./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-crafted/xor4.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd802b5-956f-4314-b12c-36fc3c23b5f2/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd802b5-956f-4314-b12c-36fc3c23b5f2/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_3fd802b5-956f-4314-b12c-36fc3c23b5f2/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd802b5-956f-4314-b12c-36fc3c23b5f2/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-crafted/xor4.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd802b5-956f-4314-b12c-36fc3c23b5f2/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_3fd802b5-956f-4314-b12c-36fc3c23b5f2/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 90b7e6947bda838aad0c5e01877b9a712c46c1a2dc1a2af9f1fb1c6266593b6a --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 23:03:48,285 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 23:03:48,394 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd802b5-956f-4314-b12c-36fc3c23b5f2/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 23:03:48,401 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 23:03:48,402 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 23:03:48,442 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 23:03:48,442 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 23:03:48,443 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 23:03:48,444 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 23:03:48,449 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 23:03:48,451 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 23:03:48,452 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 23:03:48,452 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 23:03:48,454 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 23:03:48,455 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 23:03:48,455 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 23:03:48,455 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 23:03:48,456 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 23:03:48,456 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 23:03:48,457 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 23:03:48,457 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 23:03:48,458 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 23:03:48,458 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 23:03:48,459 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 23:03:48,459 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 23:03:48,460 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 23:03:48,460 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 23:03:48,460 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 23:03:48,461 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 23:03:48,461 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 23:03:48,463 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 23:03:48,463 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 23:03:48,463 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 23:03:48,463 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 23:03:48,464 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 23:03:48,464 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 23:03:48,464 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 23:03:48,464 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 23:03:48,464 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 23:03:48,465 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_3fd802b5-956f-4314-b12c-36fc3c23b5f2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd802b5-956f-4314-b12c-36fc3c23b5f2/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 90b7e6947bda838aad0c5e01877b9a712c46c1a2dc1a2af9f1fb1c6266593b6a [2023-11-06 23:03:48,757 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 23:03:48,781 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 23:03:48,784 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 23:03:48,785 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 23:03:48,786 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 23:03:48,787 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd802b5-956f-4314-b12c-36fc3c23b5f2/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/array-crafted/xor4.i [2023-11-06 23:03:51,960 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 23:03:52,215 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 23:03:52,215 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd802b5-956f-4314-b12c-36fc3c23b5f2/sv-benchmarks/c/array-crafted/xor4.i [2023-11-06 23:03:52,224 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd802b5-956f-4314-b12c-36fc3c23b5f2/bin/uautomizer-verify-WvqO1wxjHP/data/a85dc45cd/b329e9e195b74701ad07c21c75f7d9ad/FLAG206749d65 [2023-11-06 23:03:52,245 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd802b5-956f-4314-b12c-36fc3c23b5f2/bin/uautomizer-verify-WvqO1wxjHP/data/a85dc45cd/b329e9e195b74701ad07c21c75f7d9ad [2023-11-06 23:03:52,252 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 23:03:52,255 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 23:03:52,258 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 23:03:52,259 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 23:03:52,265 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 23:03:52,265 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:03:52" (1/1) ... [2023-11-06 23:03:52,266 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e75528 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:52, skipping insertion in model container [2023-11-06 23:03:52,267 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:03:52" (1/1) ... [2023-11-06 23:03:52,297 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 23:03:52,477 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_3fd802b5-956f-4314-b12c-36fc3c23b5f2/sv-benchmarks/c/array-crafted/xor4.i[1303,1316] [2023-11-06 23:03:52,482 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 23:03:52,492 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 23:03:52,515 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_3fd802b5-956f-4314-b12c-36fc3c23b5f2/sv-benchmarks/c/array-crafted/xor4.i[1303,1316] [2023-11-06 23:03:52,516 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 23:03:52,533 INFO L206 MainTranslator]: Completed translation [2023-11-06 23:03:52,533 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:52 WrapperNode [2023-11-06 23:03:52,533 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 23:03:52,535 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 23:03:52,535 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 23:03:52,535 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 23:03:52,543 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:52" (1/1) ... [2023-11-06 23:03:52,550 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:52" (1/1) ... [2023-11-06 23:03:52,572 INFO L138 Inliner]: procedures = 16, calls = 30, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 76 [2023-11-06 23:03:52,572 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 23:03:52,573 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 23:03:52,573 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 23:03:52,574 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 23:03:52,587 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:52" (1/1) ... [2023-11-06 23:03:52,587 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:52" (1/1) ... [2023-11-06 23:03:52,592 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:52" (1/1) ... [2023-11-06 23:03:52,592 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:52" (1/1) ... [2023-11-06 23:03:52,599 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:52" (1/1) ... [2023-11-06 23:03:52,603 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:52" (1/1) ... [2023-11-06 23:03:52,605 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:52" (1/1) ... [2023-11-06 23:03:52,606 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:52" (1/1) ... [2023-11-06 23:03:52,608 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 23:03:52,609 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 23:03:52,610 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 23:03:52,610 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 23:03:52,611 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:52" (1/1) ... [2023-11-06 23:03:52,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 23:03:52,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd802b5-956f-4314-b12c-36fc3c23b5f2/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:03:52,648 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd802b5-956f-4314-b12c-36fc3c23b5f2/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 23:03:52,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd802b5-956f-4314-b12c-36fc3c23b5f2/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 23:03:52,690 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 23:03:52,690 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 23:03:52,690 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 23:03:52,690 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 23:03:52,690 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 23:03:52,690 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 23:03:52,690 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 23:03:52,691 INFO L130 BoogieDeclarations]: Found specification of procedure xor [2023-11-06 23:03:52,691 INFO L138 BoogieDeclarations]: Found implementation of procedure xor [2023-11-06 23:03:52,691 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 23:03:52,768 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 23:03:52,770 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 23:03:52,975 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 23:03:52,982 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 23:03:52,982 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-06 23:03:52,984 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:03:52 BoogieIcfgContainer [2023-11-06 23:03:52,984 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 23:03:52,988 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 23:03:52,988 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 23:03:52,992 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 23:03:52,992 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 11:03:52" (1/3) ... [2023-11-06 23:03:52,993 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a924f7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:03:52, skipping insertion in model container [2023-11-06 23:03:52,993 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:52" (2/3) ... [2023-11-06 23:03:52,994 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a924f7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:03:52, skipping insertion in model container [2023-11-06 23:03:52,994 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:03:52" (3/3) ... [2023-11-06 23:03:52,995 INFO L112 eAbstractionObserver]: Analyzing ICFG xor4.i [2023-11-06 23:03:53,016 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 23:03:53,016 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 23:03:53,097 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 23:03:53,105 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;@1f5e48a5, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 23:03:53,105 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-06 23:03:53,109 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 25 states have (on average 1.44) internal successors, (36), 26 states have internal predecessors, (36), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-06 23:03:53,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-06 23:03:53,119 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:03:53,120 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:03:53,120 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:03:53,126 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:03:53,126 INFO L85 PathProgramCache]: Analyzing trace with hash 1281058140, now seen corresponding path program 1 times [2023-11-06 23:03:53,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:03:53,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132804157] [2023-11-06 23:03:53,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:53,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:03:53,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:53,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-06 23:03:53,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:53,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-06 23:03:53,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:53,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-06 23:03:53,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:53,589 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-06 23:03:53,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:03:53,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132804157] [2023-11-06 23:03:53,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132804157] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:03:53,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470804537] [2023-11-06 23:03:53,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:53,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:03:53,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd802b5-956f-4314-b12c-36fc3c23b5f2/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:03:53,600 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd802b5-956f-4314-b12c-36fc3c23b5f2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:03:53,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd802b5-956f-4314-b12c-36fc3c23b5f2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 23:03:53,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:53,714 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-06 23:03:53,719 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:03:53,740 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-06 23:03:53,740 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:03:53,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470804537] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:03:53,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 23:03:53,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 4 [2023-11-06 23:03:53,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533898585] [2023-11-06 23:03:53,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:03:53,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-06 23:03:53,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:03:53,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-06 23:03:53,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:03:53,782 INFO L87 Difference]: Start difference. First operand has 31 states, 25 states have (on average 1.44) internal successors, (36), 26 states have internal predecessors, (36), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-06 23:03:53,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:03:53,801 INFO L93 Difference]: Finished difference Result 58 states and 81 transitions. [2023-11-06 23:03:53,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-06 23:03:53,803 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2023-11-06 23:03:53,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:03:53,809 INFO L225 Difference]: With dead ends: 58 [2023-11-06 23:03:53,809 INFO L226 Difference]: Without dead ends: 27 [2023-11-06 23:03:53,812 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:03:53,815 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 23:03:53,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 23:03:53,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-11-06 23:03:53,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2023-11-06 23:03:53,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-06 23:03:53,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2023-11-06 23:03:53,857 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 29 [2023-11-06 23:03:53,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:03:53,858 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2023-11-06 23:03:53,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-06 23:03:53,859 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2023-11-06 23:03:53,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-06 23:03:53,861 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:03:53,861 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:03:53,869 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd802b5-956f-4314-b12c-36fc3c23b5f2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-06 23:03:54,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd802b5-956f-4314-b12c-36fc3c23b5f2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:03:54,067 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:03:54,068 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:03:54,068 INFO L85 PathProgramCache]: Analyzing trace with hash -822135594, now seen corresponding path program 1 times [2023-11-06 23:03:54,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:03:54,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789775788] [2023-11-06 23:03:54,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:54,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:03:54,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:54,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-06 23:03:54,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:54,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-06 23:03:54,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:54,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-06 23:03:54,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:54,260 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-06 23:03:54,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:03:54,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789775788] [2023-11-06 23:03:54,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789775788] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:03:54,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88175325] [2023-11-06 23:03:54,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:54,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:03:54,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd802b5-956f-4314-b12c-36fc3c23b5f2/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:03:54,267 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd802b5-956f-4314-b12c-36fc3c23b5f2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:03:54,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd802b5-956f-4314-b12c-36fc3c23b5f2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 23:03:54,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:54,395 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 23:03:54,398 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:03:54,415 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-06 23:03:54,415 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:03:54,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88175325] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:03:54,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 23:03:54,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-11-06 23:03:54,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391696425] [2023-11-06 23:03:54,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:03:54,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:03:54,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:03:54,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:03:54,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 23:03:54,419 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-06 23:03:54,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:03:54,436 INFO L93 Difference]: Finished difference Result 52 states and 66 transitions. [2023-11-06 23:03:54,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:03:54,437 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 29 [2023-11-06 23:03:54,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:03:54,438 INFO L225 Difference]: With dead ends: 52 [2023-11-06 23:03:54,439 INFO L226 Difference]: Without dead ends: 29 [2023-11-06 23:03:54,439 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 23:03:54,441 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 1 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 23:03:54,442 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 61 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 23:03:54,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-11-06 23:03:54,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2023-11-06 23:03:54,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-06 23:03:54,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2023-11-06 23:03:54,450 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 29 [2023-11-06 23:03:54,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:03:54,451 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2023-11-06 23:03:54,451 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), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-06 23:03:54,451 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2023-11-06 23:03:54,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-06 23:03:54,453 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:03:54,453 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:03:54,464 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd802b5-956f-4314-b12c-36fc3c23b5f2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 23:03:54,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd802b5-956f-4314-b12c-36fc3c23b5f2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:03:54,658 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:03:54,658 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:03:54,659 INFO L85 PathProgramCache]: Analyzing trace with hash 1562728212, now seen corresponding path program 1 times [2023-11-06 23:03:54,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:03:54,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112365553] [2023-11-06 23:03:54,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:54,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:03:54,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:54,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-06 23:03:54,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:54,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-06 23:03:54,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:54,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-11-06 23:03:54,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:54,823 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-06 23:03:54,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:03:54,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112365553] [2023-11-06 23:03:54,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112365553] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:03:54,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669430870] [2023-11-06 23:03:54,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:54,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:03:54,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd802b5-956f-4314-b12c-36fc3c23b5f2/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:03:54,827 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd802b5-956f-4314-b12c-36fc3c23b5f2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:03:54,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd802b5-956f-4314-b12c-36fc3c23b5f2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 23:03:54,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:54,918 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 23:03:54,921 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:03:54,934 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-06 23:03:54,934 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:03:54,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669430870] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:03:54,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 23:03:54,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-11-06 23:03:54,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825437542] [2023-11-06 23:03:54,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:03:54,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:03:54,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:03:54,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:03:54,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 23:03:54,938 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-06 23:03:54,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:03:54,975 INFO L93 Difference]: Finished difference Result 55 states and 74 transitions. [2023-11-06 23:03:54,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:03:54,980 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2023-11-06 23:03:54,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:03:54,982 INFO L225 Difference]: With dead ends: 55 [2023-11-06 23:03:54,982 INFO L226 Difference]: Without dead ends: 34 [2023-11-06 23:03:54,983 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 37 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 23:03:54,984 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 8 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 23:03:54,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 62 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 23:03:54,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-11-06 23:03:54,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 29. [2023-11-06 23:03:54,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.25) internal successors, (30), 24 states have internal predecessors, (30), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-06 23:03:55,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2023-11-06 23:03:55,002 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 31 [2023-11-06 23:03:55,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:03:55,003 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2023-11-06 23:03:55,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-06 23:03:55,004 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2023-11-06 23:03:55,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-06 23:03:55,006 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:03:55,007 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:03:55,021 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd802b5-956f-4314-b12c-36fc3c23b5f2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 23:03:55,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd802b5-956f-4314-b12c-36fc3c23b5f2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:03:55,213 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:03:55,213 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:03:55,213 INFO L85 PathProgramCache]: Analyzing trace with hash -1573441105, now seen corresponding path program 1 times [2023-11-06 23:03:55,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:03:55,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112553262] [2023-11-06 23:03:55,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:55,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:03:55,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:55,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-06 23:03:55,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:55,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-06 23:03:55,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:55,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-11-06 23:03:55,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:55,435 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-06 23:03:55,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:03:55,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112553262] [2023-11-06 23:03:55,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112553262] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:03:55,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081620293] [2023-11-06 23:03:55,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:55,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:03:55,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd802b5-956f-4314-b12c-36fc3c23b5f2/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:03:55,443 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd802b5-956f-4314-b12c-36fc3c23b5f2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:03:55,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd802b5-956f-4314-b12c-36fc3c23b5f2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 23:03:55,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:55,546 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 23:03:55,548 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:03:55,562 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-06 23:03:55,563 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:03:55,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081620293] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:03:55,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 23:03:55,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-11-06 23:03:55,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906689299] [2023-11-06 23:03:55,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:03:55,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:03:55,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:03:55,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:03:55,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-06 23:03:55,566 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-06 23:03:55,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:03:55,590 INFO L93 Difference]: Finished difference Result 48 states and 59 transitions. [2023-11-06 23:03:55,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:03:55,591 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 43 [2023-11-06 23:03:55,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:03:55,592 INFO L225 Difference]: With dead ends: 48 [2023-11-06 23:03:55,592 INFO L226 Difference]: Without dead ends: 31 [2023-11-06 23:03:55,593 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-06 23:03:55,594 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 1 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 60 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 23:03:55,595 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 60 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 23:03:55,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-11-06 23:03:55,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2023-11-06 23:03:55,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-06 23:03:55,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2023-11-06 23:03:55,602 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 43 [2023-11-06 23:03:55,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:03:55,602 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2023-11-06 23:03:55,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-06 23:03:55,603 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2023-11-06 23:03:55,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-06 23:03:55,605 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:03:55,605 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:03:55,616 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd802b5-956f-4314-b12c-36fc3c23b5f2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 23:03:55,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd802b5-956f-4314-b12c-36fc3c23b5f2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:03:55,815 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:03:55,815 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:03:55,815 INFO L85 PathProgramCache]: Analyzing trace with hash 1108099501, now seen corresponding path program 1 times [2023-11-06 23:03:55,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:03:55,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895058671] [2023-11-06 23:03:55,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:55,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:03:55,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:55,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-06 23:03:55,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:55,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-06 23:03:55,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:55,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-11-06 23:03:55,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:55,965 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-06 23:03:55,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:03:55,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895058671] [2023-11-06 23:03:55,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895058671] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:03:55,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216917795] [2023-11-06 23:03:55,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:55,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:03:55,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd802b5-956f-4314-b12c-36fc3c23b5f2/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:03:55,968 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd802b5-956f-4314-b12c-36fc3c23b5f2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:03:55,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd802b5-956f-4314-b12c-36fc3c23b5f2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 23:03:56,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:56,067 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 23:03:56,071 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:03:56,121 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-11-06 23:03:56,121 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:03:56,177 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-11-06 23:03:56,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216917795] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:03:56,178 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:03:56,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2023-11-06 23:03:56,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634715309] [2023-11-06 23:03:56,178 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:03:56,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-06 23:03:56,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:03:56,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-06 23:03:56,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-06 23:03:56,180 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-06 23:03:56,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:03:56,257 INFO L93 Difference]: Finished difference Result 72 states and 98 transitions. [2023-11-06 23:03:56,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 23:03:56,258 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 45 [2023-11-06 23:03:56,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:03:56,261 INFO L225 Difference]: With dead ends: 72 [2023-11-06 23:03:56,261 INFO L226 Difference]: Without dead ends: 47 [2023-11-06 23:03:56,262 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-06 23:03:56,263 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 20 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 23:03:56,267 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 173 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 23:03:56,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-11-06 23:03:56,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 42. [2023-11-06 23:03:56,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 37 states have (on average 1.2432432432432432) internal successors, (46), 37 states have internal predecessors, (46), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-06 23:03:56,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 52 transitions. [2023-11-06 23:03:56,284 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 52 transitions. Word has length 45 [2023-11-06 23:03:56,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:03:56,284 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 52 transitions. [2023-11-06 23:03:56,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-06 23:03:56,285 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 52 transitions. [2023-11-06 23:03:56,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-11-06 23:03:56,289 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:03:56,290 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:03:56,297 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd802b5-956f-4314-b12c-36fc3c23b5f2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 23:03:56,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd802b5-956f-4314-b12c-36fc3c23b5f2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:03:56,497 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:03:56,497 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:03:56,497 INFO L85 PathProgramCache]: Analyzing trace with hash -1898108414, now seen corresponding path program 2 times [2023-11-06 23:03:56,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:03:56,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427890737] [2023-11-06 23:03:56,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:56,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:03:56,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:56,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-06 23:03:56,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:56,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-11-06 23:03:56,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:56,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-11-06 23:03:56,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:56,661 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2023-11-06 23:03:56,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:03:56,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427890737] [2023-11-06 23:03:56,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427890737] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:03:56,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862264302] [2023-11-06 23:03:56,662 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 23:03:56,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:03:56,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd802b5-956f-4314-b12c-36fc3c23b5f2/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:03:56,665 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd802b5-956f-4314-b12c-36fc3c23b5f2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:03:56,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd802b5-956f-4314-b12c-36fc3c23b5f2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 23:03:56,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 23:03:56,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:03:56,807 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 23:03:56,819 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:03:56,875 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2023-11-06 23:03:56,876 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:03:56,973 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2023-11-06 23:03:56,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862264302] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:03:56,974 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:03:56,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2023-11-06 23:03:56,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939792508] [2023-11-06 23:03:56,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:03:56,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-06 23:03:56,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:03:56,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-06 23:03:56,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-11-06 23:03:56,980 INFO L87 Difference]: Start difference. First operand 42 states and 52 transitions. Second operand has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 14 states have internal predecessors, (57), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-06 23:03:57,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:03:57,087 INFO L93 Difference]: Finished difference Result 88 states and 114 transitions. [2023-11-06 23:03:57,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-06 23:03:57,090 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 14 states have internal predecessors, (57), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 63 [2023-11-06 23:03:57,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:03:57,093 INFO L225 Difference]: With dead ends: 88 [2023-11-06 23:03:57,094 INFO L226 Difference]: Without dead ends: 57 [2023-11-06 23:03:57,097 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 122 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 23:03:57,100 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 3 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 23:03:57,100 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 163 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 23:03:57,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-11-06 23:03:57,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2023-11-06 23:03:57,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 51 states have (on average 1.1764705882352942) internal successors, (60), 51 states have internal predecessors, (60), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-06 23:03:57,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2023-11-06 23:03:57,119 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 63 [2023-11-06 23:03:57,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:03:57,122 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2023-11-06 23:03:57,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 14 states have internal predecessors, (57), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-06 23:03:57,125 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2023-11-06 23:03:57,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-11-06 23:03:57,129 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:03:57,129 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 6, 6, 6, 6, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:03:57,136 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd802b5-956f-4314-b12c-36fc3c23b5f2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 23:03:57,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd802b5-956f-4314-b12c-36fc3c23b5f2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:03:57,336 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:03:57,337 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:03:57,337 INFO L85 PathProgramCache]: Analyzing trace with hash -1166579724, now seen corresponding path program 3 times [2023-11-06 23:03:57,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:03:57,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796852065] [2023-11-06 23:03:57,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:57,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:03:57,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:57,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-11-06 23:03:57,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:57,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2023-11-06 23:03:57,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:57,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2023-11-06 23:03:57,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:57,511 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2023-11-06 23:03:57,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:03:57,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796852065] [2023-11-06 23:03:57,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796852065] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:03:57,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96306417] [2023-11-06 23:03:57,512 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 23:03:57,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:03:57,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd802b5-956f-4314-b12c-36fc3c23b5f2/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:03:57,513 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd802b5-956f-4314-b12c-36fc3c23b5f2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:03:57,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd802b5-956f-4314-b12c-36fc3c23b5f2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 23:03:57,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-06 23:03:57,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:03:57,627 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 23:03:57,630 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:03:57,650 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 48 proven. 6 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2023-11-06 23:03:57,651 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:03:57,703 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 48 proven. 6 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2023-11-06 23:03:57,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96306417] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:03:57,704 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:03:57,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-11-06 23:03:57,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198130561] [2023-11-06 23:03:57,704 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:03:57,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 23:03:57,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:03:57,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 23:03:57,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2023-11-06 23:03:57,706 INFO L87 Difference]: Start difference. First operand 56 states and 66 transitions. Second operand has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-06 23:03:57,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:03:57,738 INFO L93 Difference]: Finished difference Result 111 states and 148 transitions. [2023-11-06 23:03:57,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 23:03:57,739 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 77 [2023-11-06 23:03:57,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:03:57,740 INFO L225 Difference]: With dead ends: 111 [2023-11-06 23:03:57,740 INFO L226 Difference]: Without dead ends: 80 [2023-11-06 23:03:57,741 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2023-11-06 23:03:57,742 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 56 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 23:03:57,742 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 136 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 23:03:57,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2023-11-06 23:03:57,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2023-11-06 23:03:57,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 75 states have (on average 1.28) internal successors, (96), 75 states have internal predecessors, (96), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-06 23:03:57,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 102 transitions. [2023-11-06 23:03:57,752 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 102 transitions. Word has length 77 [2023-11-06 23:03:57,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:03:57,753 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 102 transitions. [2023-11-06 23:03:57,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-06 23:03:57,753 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 102 transitions. [2023-11-06 23:03:57,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2023-11-06 23:03:57,755 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:03:57,756 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 18, 10, 10, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:03:57,762 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd802b5-956f-4314-b12c-36fc3c23b5f2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 23:03:57,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd802b5-956f-4314-b12c-36fc3c23b5f2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:03:57,965 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:03:57,966 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:03:57,966 INFO L85 PathProgramCache]: Analyzing trace with hash 454582112, now seen corresponding path program 4 times [2023-11-06 23:03:57,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:03:57,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506710904] [2023-11-06 23:03:57,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:57,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:03:58,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:58,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-11-06 23:03:58,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:58,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2023-11-06 23:03:58,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:58,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2023-11-06 23:03:58,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:58,453 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 685 trivial. 0 not checked. [2023-11-06 23:03:58,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:03:58,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506710904] [2023-11-06 23:03:58,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506710904] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:03:58,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269652335] [2023-11-06 23:03:58,454 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 23:03:58,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:03:58,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd802b5-956f-4314-b12c-36fc3c23b5f2/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:03:58,455 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd802b5-956f-4314-b12c-36fc3c23b5f2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:03:58,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd802b5-956f-4314-b12c-36fc3c23b5f2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 23:03:58,620 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 23:03:58,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:03:58,623 INFO L262 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 23:03:58,627 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:03:58,679 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 685 trivial. 0 not checked. [2023-11-06 23:03:58,679 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:03:58,985 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 685 trivial. 0 not checked. [2023-11-06 23:03:58,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269652335] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:03:58,985 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:03:58,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2023-11-06 23:03:58,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501439032] [2023-11-06 23:03:58,988 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:03:58,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-06 23:03:58,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:03:58,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-06 23:03:58,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-11-06 23:03:58,992 INFO L87 Difference]: Start difference. First operand 80 states and 102 transitions. Second operand has 25 states, 25 states have (on average 2.96) internal successors, (74), 25 states have internal predecessors, (74), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-06 23:03:59,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:03:59,091 INFO L93 Difference]: Finished difference Result 161 states and 216 transitions. [2023-11-06 23:03:59,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-06 23:03:59,092 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.96) internal successors, (74), 25 states have internal predecessors, (74), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 125 [2023-11-06 23:03:59,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:03:59,095 INFO L225 Difference]: With dead ends: 161 [2023-11-06 23:03:59,095 INFO L226 Difference]: Without dead ends: 104 [2023-11-06 23:03:59,097 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 244 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 23:03:59,099 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 2 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 23:03:59,099 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 177 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 23:03:59,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2023-11-06 23:03:59,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2023-11-06 23:03:59,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 99 states have (on average 1.2121212121212122) internal successors, (120), 99 states have internal predecessors, (120), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-06 23:03:59,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 126 transitions. [2023-11-06 23:03:59,135 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 126 transitions. Word has length 125 [2023-11-06 23:03:59,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:03:59,135 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 126 transitions. [2023-11-06 23:03:59,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.96) internal successors, (74), 25 states have internal predecessors, (74), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-06 23:03:59,136 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 126 transitions. [2023-11-06 23:03:59,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2023-11-06 23:03:59,142 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:03:59,142 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 18, 18, 18, 18, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:03:59,156 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd802b5-956f-4314-b12c-36fc3c23b5f2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 23:03:59,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd802b5-956f-4314-b12c-36fc3c23b5f2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:03:59,349 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:03:59,349 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:03:59,349 INFO L85 PathProgramCache]: Analyzing trace with hash 251431752, now seen corresponding path program 5 times [2023-11-06 23:03:59,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:03:59,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065992820] [2023-11-06 23:03:59,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:59,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:03:59,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:00,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2023-11-06 23:04:00,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:00,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2023-11-06 23:04:00,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:00,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2023-11-06 23:04:00,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:00,280 INFO L134 CoverageAnalysis]: Checked inductivity of 1169 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 685 trivial. 0 not checked. [2023-11-06 23:04:00,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:04:00,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065992820] [2023-11-06 23:04:00,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065992820] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:04:00,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292483616] [2023-11-06 23:04:00,281 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 23:04:00,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:00,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd802b5-956f-4314-b12c-36fc3c23b5f2/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:04:00,283 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd802b5-956f-4314-b12c-36fc3c23b5f2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:04:00,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd802b5-956f-4314-b12c-36fc3c23b5f2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 23:04:01,883 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2023-11-06 23:04:01,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:04:01,891 INFO L262 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 23:04:01,894 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:04:02,068 INFO L134 CoverageAnalysis]: Checked inductivity of 1169 backedges. 316 proven. 66 refuted. 0 times theorem prover too weak. 787 trivial. 0 not checked. [2023-11-06 23:04:02,068 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:04:02,367 INFO L134 CoverageAnalysis]: Checked inductivity of 1169 backedges. 0 proven. 386 refuted. 0 times theorem prover too weak. 783 trivial. 0 not checked. [2023-11-06 23:04:02,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292483616] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:04:02,367 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:04:02,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 9, 9] total 39 [2023-11-06 23:04:02,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347980531] [2023-11-06 23:04:02,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:04:02,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-11-06 23:04:02,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:04:02,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-11-06 23:04:02,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=419, Invalid=1063, Unknown=0, NotChecked=0, Total=1482 [2023-11-06 23:04:02,373 INFO L87 Difference]: Start difference. First operand 104 states and 126 transitions. Second operand has 39 states, 39 states have (on average 3.3333333333333335) internal successors, (130), 39 states have internal predecessors, (130), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-06 23:04:02,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:04:02,557 INFO L93 Difference]: Finished difference Result 212 states and 291 transitions. [2023-11-06 23:04:02,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-11-06 23:04:02,559 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.3333333333333335) internal successors, (130), 39 states have internal predecessors, (130), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 149 [2023-11-06 23:04:02,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:04:02,561 INFO L225 Difference]: With dead ends: 212 [2023-11-06 23:04:02,561 INFO L226 Difference]: Without dead ends: 155 [2023-11-06 23:04:02,562 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 290 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=419, Invalid=1063, Unknown=0, NotChecked=0, Total=1482 [2023-11-06 23:04:02,563 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 217 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 23:04:02,564 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 331 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 23:04:02,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2023-11-06 23:04:02,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 154. [2023-11-06 23:04:02,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 149 states have (on average 1.3020134228187918) internal successors, (194), 149 states have internal predecessors, (194), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-06 23:04:02,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 200 transitions. [2023-11-06 23:04:02,578 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 200 transitions. Word has length 149 [2023-11-06 23:04:02,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:04:02,579 INFO L495 AbstractCegarLoop]: Abstraction has 154 states and 200 transitions. [2023-11-06 23:04:02,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.3333333333333335) internal successors, (130), 39 states have internal predecessors, (130), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-06 23:04:02,579 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 200 transitions. [2023-11-06 23:04:02,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2023-11-06 23:04:02,583 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:04:02,584 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 42, 42, 23, 23, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:04:02,600 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd802b5-956f-4314-b12c-36fc3c23b5f2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-06 23:04:02,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd802b5-956f-4314-b12c-36fc3c23b5f2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:02,793 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:04:02,794 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:04:02,794 INFO L85 PathProgramCache]: Analyzing trace with hash 432175710, now seen corresponding path program 6 times [2023-11-06 23:04:02,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:04:02,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212876016] [2023-11-06 23:04:02,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:02,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:04:02,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:03,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2023-11-06 23:04:03,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:03,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2023-11-06 23:04:03,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:03,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 182 [2023-11-06 23:04:03,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:03,964 INFO L134 CoverageAnalysis]: Checked inductivity of 4118 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 3589 trivial. 0 not checked. [2023-11-06 23:04:03,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:04:03,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212876016] [2023-11-06 23:04:03,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212876016] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:04:03,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065184700] [2023-11-06 23:04:03,965 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 23:04:03,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:03,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd802b5-956f-4314-b12c-36fc3c23b5f2/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:04:03,967 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd802b5-956f-4314-b12c-36fc3c23b5f2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:04:03,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd802b5-956f-4314-b12c-36fc3c23b5f2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 23:04:04,193 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-11-06 23:04:04,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:04:04,196 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 23:04:04,201 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:04:04,269 INFO L134 CoverageAnalysis]: Checked inductivity of 4118 backedges. 1634 proven. 4 refuted. 0 times theorem prover too weak. 2480 trivial. 0 not checked. [2023-11-06 23:04:04,269 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:04:04,380 INFO L134 CoverageAnalysis]: Checked inductivity of 4118 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4114 trivial. 0 not checked. [2023-11-06 23:04:04,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065184700] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:04:04,381 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:04:04,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 5, 5] total 32 [2023-11-06 23:04:04,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972885196] [2023-11-06 23:04:04,382 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:04:04,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-06 23:04:04,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:04:04,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-06 23:04:04,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=352, Invalid=640, Unknown=0, NotChecked=0, Total=992 [2023-11-06 23:04:04,387 INFO L87 Difference]: Start difference. First operand 154 states and 200 transitions. Second operand has 32 states, 32 states have (on average 2.90625) internal successors, (93), 32 states have internal predecessors, (93), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-06 23:04:04,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:04:04,512 INFO L93 Difference]: Finished difference Result 270 states and 366 transitions. [2023-11-06 23:04:04,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-06 23:04:04,513 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.90625) internal successors, (93), 32 states have internal predecessors, (93), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 247 [2023-11-06 23:04:04,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:04:04,514 INFO L225 Difference]: With dead ends: 270 [2023-11-06 23:04:04,514 INFO L226 Difference]: Without dead ends: 165 [2023-11-06 23:04:04,516 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 524 GetRequests, 494 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=352, Invalid=640, Unknown=0, NotChecked=0, Total=992 [2023-11-06 23:04:04,517 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 3 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 23:04:04,518 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 243 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 23:04:04,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2023-11-06 23:04:04,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 164. [2023-11-06 23:04:04,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 159 states have (on average 1.2830188679245282) internal successors, (204), 159 states have internal predecessors, (204), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-06 23:04:04,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 210 transitions. [2023-11-06 23:04:04,531 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 210 transitions. Word has length 247 [2023-11-06 23:04:04,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:04:04,532 INFO L495 AbstractCegarLoop]: Abstraction has 164 states and 210 transitions. [2023-11-06 23:04:04,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.90625) internal successors, (93), 32 states have internal predecessors, (93), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-06 23:04:04,532 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 210 transitions. [2023-11-06 23:04:04,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2023-11-06 23:04:04,537 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:04:04,537 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 42, 42, 24, 24, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:04:04,548 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd802b5-956f-4314-b12c-36fc3c23b5f2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-06 23:04:04,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd802b5-956f-4314-b12c-36fc3c23b5f2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-06 23:04:04,744 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:04:04,744 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:04:04,744 INFO L85 PathProgramCache]: Analyzing trace with hash -399469548, now seen corresponding path program 7 times [2023-11-06 23:04:04,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:04:04,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840218130] [2023-11-06 23:04:04,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:04,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:04:04,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:06,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2023-11-06 23:04:06,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:06,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2023-11-06 23:04:06,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:06,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 192 [2023-11-06 23:04:06,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:06,078 INFO L134 CoverageAnalysis]: Checked inductivity of 4197 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 3621 trivial. 0 not checked. [2023-11-06 23:04:06,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:04:06,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840218130] [2023-11-06 23:04:06,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840218130] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:04:06,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223336340] [2023-11-06 23:04:06,079 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 23:04:06,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:06,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd802b5-956f-4314-b12c-36fc3c23b5f2/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:04:06,081 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd802b5-956f-4314-b12c-36fc3c23b5f2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:04:06,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd802b5-956f-4314-b12c-36fc3c23b5f2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-06 23:04:06,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:06,381 INFO L262 TraceCheckSpWp]: Trace formula consists of 858 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-06 23:04:06,389 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:04:06,515 INFO L134 CoverageAnalysis]: Checked inductivity of 4197 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 3621 trivial. 0 not checked. [2023-11-06 23:04:06,515 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:04:07,640 INFO L134 CoverageAnalysis]: Checked inductivity of 4197 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 3621 trivial. 0 not checked. [2023-11-06 23:04:07,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223336340] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:04:07,641 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:04:07,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 53 [2023-11-06 23:04:07,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406223890] [2023-11-06 23:04:07,642 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:04:07,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-11-06 23:04:07,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:04:07,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-11-06 23:04:07,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2023-11-06 23:04:07,647 INFO L87 Difference]: Start difference. First operand 164 states and 210 transitions. Second operand has 53 states, 53 states have (on average 2.452830188679245) internal successors, (130), 53 states have internal predecessors, (130), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-06 23:04:07,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:04:07,846 INFO L93 Difference]: Finished difference Result 329 states and 446 transitions. [2023-11-06 23:04:07,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-11-06 23:04:07,847 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.452830188679245) internal successors, (130), 53 states have internal predecessors, (130), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 257 [2023-11-06 23:04:07,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:04:07,849 INFO L225 Difference]: With dead ends: 329 [2023-11-06 23:04:07,850 INFO L226 Difference]: Without dead ends: 216 [2023-11-06 23:04:07,852 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 545 GetRequests, 494 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 23:04:07,853 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 2 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 23:04:07,853 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 119 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 23:04:07,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2023-11-06 23:04:07,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 216. [2023-11-06 23:04:07,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 211 states have (on average 1.2132701421800949) internal successors, (256), 211 states have internal predecessors, (256), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-06 23:04:07,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 262 transitions. [2023-11-06 23:04:07,866 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 262 transitions. Word has length 257 [2023-11-06 23:04:07,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:04:07,868 INFO L495 AbstractCegarLoop]: Abstraction has 216 states and 262 transitions. [2023-11-06 23:04:07,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.452830188679245) internal successors, (130), 53 states have internal predecessors, (130), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-06 23:04:07,869 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 262 transitions. [2023-11-06 23:04:07,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2023-11-06 23:04:07,873 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:04:07,874 INFO L195 NwaCegarLoop]: trace histogram [50, 50, 42, 42, 42, 42, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:04:07,886 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd802b5-956f-4314-b12c-36fc3c23b5f2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-06 23:04:08,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd802b5-956f-4314-b12c-36fc3c23b5f2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-06 23:04:08,087 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:04:08,087 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:04:08,087 INFO L85 PathProgramCache]: Analyzing trace with hash 1831150304, now seen corresponding path program 8 times [2023-11-06 23:04:08,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:04:08,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129817293] [2023-11-06 23:04:08,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:08,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:04:08,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:11,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2023-11-06 23:04:11,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:11,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2023-11-06 23:04:11,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:11,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 244 [2023-11-06 23:04:11,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:11,300 INFO L134 CoverageAnalysis]: Checked inductivity of 6121 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 3621 trivial. 0 not checked. [2023-11-06 23:04:11,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:04:11,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129817293] [2023-11-06 23:04:11,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129817293] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:04:11,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563606630] [2023-11-06 23:04:11,301 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 23:04:11,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:11,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd802b5-956f-4314-b12c-36fc3c23b5f2/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:04:11,302 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd802b5-956f-4314-b12c-36fc3c23b5f2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:04:11,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd802b5-956f-4314-b12c-36fc3c23b5f2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-06 23:04:11,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 23:04:11,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:04:11,665 INFO L262 TraceCheckSpWp]: Trace formula consists of 1092 conjuncts, 52 conjunts are in the unsatisfiable core [2023-11-06 23:04:11,673 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:04:11,887 INFO L134 CoverageAnalysis]: Checked inductivity of 6121 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 3621 trivial. 0 not checked. [2023-11-06 23:04:11,888 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:04:16,108 INFO L134 CoverageAnalysis]: Checked inductivity of 6121 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 3621 trivial. 0 not checked. [2023-11-06 23:04:16,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563606630] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:04:16,109 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:04:16,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53, 53] total 105 [2023-11-06 23:04:16,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216325813] [2023-11-06 23:04:16,110 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:04:16,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2023-11-06 23:04:16,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:04:16,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2023-11-06 23:04:16,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2023-11-06 23:04:16,120 INFO L87 Difference]: Start difference. First operand 216 states and 262 transitions. Second operand has 105 states, 105 states have (on average 2.2285714285714286) internal successors, (234), 105 states have internal predecessors, (234), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-06 23:04:16,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:04:16,540 INFO L93 Difference]: Finished difference Result 433 states and 576 transitions. [2023-11-06 23:04:16,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2023-11-06 23:04:16,541 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 2.2285714285714286) internal successors, (234), 105 states have internal predecessors, (234), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 309 [2023-11-06 23:04:16,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:04:16,544 INFO L225 Difference]: With dead ends: 433 [2023-11-06 23:04:16,544 INFO L226 Difference]: Without dead ends: 320 [2023-11-06 23:04:16,548 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 675 GetRequests, 572 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2023-11-06 23:04:16,549 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 2 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 23:04:16,550 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 61 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 23:04:16,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2023-11-06 23:04:16,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 320. [2023-11-06 23:04:16,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 315 states have (on average 1.1428571428571428) internal successors, (360), 315 states have internal predecessors, (360), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-06 23:04:16,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 366 transitions. [2023-11-06 23:04:16,563 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 366 transitions. Word has length 309 [2023-11-06 23:04:16,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:04:16,564 INFO L495 AbstractCegarLoop]: Abstraction has 320 states and 366 transitions. [2023-11-06 23:04:16,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 2.2285714285714286) internal successors, (234), 105 states have internal predecessors, (234), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-06 23:04:16,564 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 366 transitions. [2023-11-06 23:04:16,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 414 [2023-11-06 23:04:16,572 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:04:16,572 INFO L195 NwaCegarLoop]: trace histogram [102, 102, 42, 42, 42, 42, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:04:16,586 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd802b5-956f-4314-b12c-36fc3c23b5f2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-06 23:04:16,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd802b5-956f-4314-b12c-36fc3c23b5f2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-06 23:04:16,780 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:04:16,780 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:04:16,780 INFO L85 PathProgramCache]: Analyzing trace with hash 650679928, now seen corresponding path program 9 times [2023-11-06 23:04:16,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:04:16,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027797244] [2023-11-06 23:04:16,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:16,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:04:16,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:25,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2023-11-06 23:04:25,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:25,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 271 [2023-11-06 23:04:25,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:25,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 348 [2023-11-06 23:04:25,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:25,694 INFO L134 CoverageAnalysis]: Checked inductivity of 14025 backedges. 0 proven. 10404 refuted. 0 times theorem prover too weak. 3621 trivial. 0 not checked. [2023-11-06 23:04:25,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:04:25,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027797244] [2023-11-06 23:04:25,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027797244] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:04:25,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797873742] [2023-11-06 23:04:25,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 23:04:25,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:25,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd802b5-956f-4314-b12c-36fc3c23b5f2/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:04:25,697 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd802b5-956f-4314-b12c-36fc3c23b5f2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:04:25,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd802b5-956f-4314-b12c-36fc3c23b5f2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-06 23:04:26,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2023-11-06 23:04:26,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:04:26,145 INFO L262 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 23:04:26,151 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:04:26,575 INFO L134 CoverageAnalysis]: Checked inductivity of 14025 backedges. 1634 proven. 36 refuted. 0 times theorem prover too weak. 12355 trivial. 0 not checked. [2023-11-06 23:04:26,575 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:04:27,027 INFO L134 CoverageAnalysis]: Checked inductivity of 14025 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 13989 trivial. 0 not checked. [2023-11-06 23:04:27,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797873742] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:04:27,027 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:04:27,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 9, 9] total 119 [2023-11-06 23:04:27,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406327051] [2023-11-06 23:04:27,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:04:27,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2023-11-06 23:04:27,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:04:27,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2023-11-06 23:04:27,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5579, Invalid=8463, Unknown=0, NotChecked=0, Total=14042 [2023-11-06 23:04:27,039 INFO L87 Difference]: Start difference. First operand 320 states and 366 transitions. Second operand has 119 states, 119 states have (on average 2.2436974789915967) internal successors, (267), 119 states have internal predecessors, (267), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-06 23:04:27,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:04:27,606 INFO L93 Difference]: Finished difference Result 452 states and 552 transitions. [2023-11-06 23:04:27,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2023-11-06 23:04:27,607 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 2.2436974789915967) internal successors, (267), 119 states have internal predecessors, (267), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 413 [2023-11-06 23:04:27,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:04:27,609 INFO L225 Difference]: With dead ends: 452 [2023-11-06 23:04:27,610 INFO L226 Difference]: Without dead ends: 339 [2023-11-06 23:04:27,615 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 935 GetRequests, 818 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1428 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=5579, Invalid=8463, Unknown=0, NotChecked=0, Total=14042 [2023-11-06 23:04:27,616 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 3 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 23:04:27,616 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 243 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 23:04:27,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2023-11-06 23:04:27,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 338. [2023-11-06 23:04:27,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 333 states have (on average 1.135135135135135) internal successors, (378), 333 states have internal predecessors, (378), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-06 23:04:27,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 384 transitions. [2023-11-06 23:04:27,631 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 384 transitions. Word has length 413 [2023-11-06 23:04:27,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:04:27,632 INFO L495 AbstractCegarLoop]: Abstraction has 338 states and 384 transitions. [2023-11-06 23:04:27,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 119 states have (on average 2.2436974789915967) internal successors, (267), 119 states have internal predecessors, (267), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-06 23:04:27,633 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 384 transitions. [2023-11-06 23:04:27,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 432 [2023-11-06 23:04:27,641 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:04:27,642 INFO L195 NwaCegarLoop]: trace histogram [103, 103, 42, 42, 42, 42, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:04:27,656 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd802b5-956f-4314-b12c-36fc3c23b5f2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-06 23:04:27,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd802b5-956f-4314-b12c-36fc3c23b5f2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-06 23:04:27,848 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:04:27,849 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:04:27,849 INFO L85 PathProgramCache]: Analyzing trace with hash -1154965850, now seen corresponding path program 10 times [2023-11-06 23:04:27,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:04:27,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796534951] [2023-11-06 23:04:27,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:27,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:04:28,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:36,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 210 [2023-11-06 23:04:36,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:36,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 273 [2023-11-06 23:04:36,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:36,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 366 [2023-11-06 23:04:36,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:36,585 INFO L134 CoverageAnalysis]: Checked inductivity of 14390 backedges. 0 proven. 10609 refuted. 0 times theorem prover too weak. 3781 trivial. 0 not checked. [2023-11-06 23:04:36,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:04:36,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796534951] [2023-11-06 23:04:36,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796534951] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:04:36,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998597779] [2023-11-06 23:04:36,586 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 23:04:36,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:36,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd802b5-956f-4314-b12c-36fc3c23b5f2/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:04:36,588 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd802b5-956f-4314-b12c-36fc3c23b5f2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:04:36,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd802b5-956f-4314-b12c-36fc3c23b5f2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-06 23:04:37,133 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 23:04:37,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:04:37,145 INFO L262 TraceCheckSpWp]: Trace formula consists of 1625 conjuncts, 105 conjunts are in the unsatisfiable core [2023-11-06 23:04:37,154 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:04:37,476 INFO L134 CoverageAnalysis]: Checked inductivity of 14390 backedges. 0 proven. 10609 refuted. 0 times theorem prover too weak. 3781 trivial. 0 not checked. [2023-11-06 23:04:37,477 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:04:51,274 INFO L134 CoverageAnalysis]: Checked inductivity of 14390 backedges. 0 proven. 10609 refuted. 0 times theorem prover too weak. 3781 trivial. 0 not checked. [2023-11-06 23:04:51,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998597779] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:04:51,274 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:04:51,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 106, 106] total 211 [2023-11-06 23:04:51,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363960945] [2023-11-06 23:04:51,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:04:51,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 211 states [2023-11-06 23:04:51,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:04:51,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 211 interpolants. [2023-11-06 23:04:51,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22155, Invalid=22155, Unknown=0, NotChecked=0, Total=44310 [2023-11-06 23:04:51,291 INFO L87 Difference]: Start difference. First operand 338 states and 384 transitions. Second operand has 211 states, 211 states have (on average 2.1137440758293837) internal successors, (446), 211 states have internal predecessors, (446), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-06 23:04:52,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:04:52,796 INFO L93 Difference]: Finished difference Result 677 states and 873 transitions. [2023-11-06 23:04:52,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 210 states. [2023-11-06 23:04:52,809 INFO L78 Accepts]: Start accepts. Automaton has has 211 states, 211 states have (on average 2.1137440758293837) internal successors, (446), 211 states have internal predecessors, (446), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 431 [2023-11-06 23:04:52,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:04:52,813 INFO L225 Difference]: With dead ends: 677 [2023-11-06 23:04:52,813 INFO L226 Difference]: Without dead ends: 548 [2023-11-06 23:04:52,819 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 972 GetRequests, 763 SyntacticMatches, 0 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 17.9s TimeCoverageRelationStatistics Valid=22155, Invalid=22155, Unknown=0, NotChecked=0, Total=44310 [2023-11-06 23:04:52,819 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 2 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-06 23:04:52,820 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 148 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-06 23:04:52,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2023-11-06 23:04:52,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 548. [2023-11-06 23:04:52,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 543 states have (on average 1.0828729281767955) internal successors, (588), 543 states have internal predecessors, (588), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-06 23:04:52,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 594 transitions. [2023-11-06 23:04:52,842 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 594 transitions. Word has length 431 [2023-11-06 23:04:52,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:04:52,843 INFO L495 AbstractCegarLoop]: Abstraction has 548 states and 594 transitions. [2023-11-06 23:04:52,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 211 states, 211 states have (on average 2.1137440758293837) internal successors, (446), 211 states have internal predecessors, (446), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-06 23:04:52,844 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 594 transitions. [2023-11-06 23:04:52,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 642 [2023-11-06 23:04:52,863 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:04:52,864 INFO L195 NwaCegarLoop]: trace histogram [208, 208, 42, 42, 42, 42, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:04:52,873 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd802b5-956f-4314-b12c-36fc3c23b5f2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-06 23:04:53,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd802b5-956f-4314-b12c-36fc3c23b5f2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-06 23:04:53,072 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:04:53,073 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:04:53,073 INFO L85 PathProgramCache]: Analyzing trace with hash 1217205396, now seen corresponding path program 11 times [2023-11-06 23:04:53,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:04:53,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281246201] [2023-11-06 23:04:53,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:53,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:04:53,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:05:26,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 420 [2023-11-06 23:05:26,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:05:26,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 483 [2023-11-06 23:05:26,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:05:26,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 576 [2023-11-06 23:05:26,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:05:26,502 INFO L134 CoverageAnalysis]: Checked inductivity of 47045 backedges. 0 proven. 43264 refuted. 0 times theorem prover too weak. 3781 trivial. 0 not checked. [2023-11-06 23:05:26,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:05:26,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281246201] [2023-11-06 23:05:26,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281246201] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:05:26,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369086501] [2023-11-06 23:05:26,503 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 23:05:26,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:05:26,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd802b5-956f-4314-b12c-36fc3c23b5f2/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:05:26,505 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd802b5-956f-4314-b12c-36fc3c23b5f2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:05:26,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd802b5-956f-4314-b12c-36fc3c23b5f2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process