./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-76.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_e64ba29b-166a-46fc-a566-4e760716d806/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e64ba29b-166a-46fc-a566-4e760716d806/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_e64ba29b-166a-46fc-a566-4e760716d806/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e64ba29b-166a-46fc-a566-4e760716d806/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-76.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e64ba29b-166a-46fc-a566-4e760716d806/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_e64ba29b-166a-46fc-a566-4e760716d806/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 0be401d6498cca46882a4cc3fc239228ee20ea10357489f3f675e5f70b0bebf7 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 21:59:15,532 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 21:59:15,639 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e64ba29b-166a-46fc-a566-4e760716d806/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 21:59:15,648 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 21:59:15,650 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 21:59:15,688 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 21:59:15,690 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 21:59:15,691 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 21:59:15,692 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 21:59:15,697 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 21:59:15,698 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 21:59:15,698 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 21:59:15,699 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 21:59:15,705 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 21:59:15,705 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 21:59:15,706 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 21:59:15,720 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 21:59:15,721 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 21:59:15,721 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 21:59:15,722 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 21:59:15,722 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 21:59:15,723 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 21:59:15,723 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 21:59:15,724 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 21:59:15,724 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 21:59:15,725 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 21:59:15,726 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 21:59:15,726 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 21:59:15,727 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 21:59:15,727 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 21:59:15,729 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 21:59:15,729 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 21:59:15,730 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 21:59:15,730 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 21:59:15,730 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 21:59:15,731 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 21:59:15,731 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 21:59:15,731 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 21:59:15,732 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 21:59:15,732 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_e64ba29b-166a-46fc-a566-4e760716d806/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e64ba29b-166a-46fc-a566-4e760716d806/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0be401d6498cca46882a4cc3fc239228ee20ea10357489f3f675e5f70b0bebf7 [2023-11-06 21:59:16,064 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 21:59:16,096 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 21:59:16,099 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 21:59:16,100 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 21:59:16,101 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 21:59:16,102 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e64ba29b-166a-46fc-a566-4e760716d806/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-76.i [2023-11-06 21:59:19,150 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 21:59:19,507 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 21:59:19,521 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e64ba29b-166a-46fc-a566-4e760716d806/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-76.i [2023-11-06 21:59:19,541 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e64ba29b-166a-46fc-a566-4e760716d806/bin/uautomizer-verify-WvqO1wxjHP/data/eceb12778/29db3d79b8bd4d5ea03079f4961deb18/FLAG8b5887242 [2023-11-06 21:59:19,561 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e64ba29b-166a-46fc-a566-4e760716d806/bin/uautomizer-verify-WvqO1wxjHP/data/eceb12778/29db3d79b8bd4d5ea03079f4961deb18 [2023-11-06 21:59:19,568 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 21:59:19,569 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 21:59:19,576 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 21:59:19,576 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 21:59:19,583 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 21:59:19,586 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:59:19" (1/1) ... [2023-11-06 21:59:19,588 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f660803 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:59:19, skipping insertion in model container [2023-11-06 21:59:19,588 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:59:19" (1/1) ... [2023-11-06 21:59:19,655 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 21:59:19,807 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_e64ba29b-166a-46fc-a566-4e760716d806/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-76.i[916,929] [2023-11-06 21:59:19,955 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 21:59:19,980 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 21:59:19,998 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_e64ba29b-166a-46fc-a566-4e760716d806/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-76.i[916,929] [2023-11-06 21:59:20,111 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 21:59:20,151 INFO L206 MainTranslator]: Completed translation [2023-11-06 21:59:20,152 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:59:20 WrapperNode [2023-11-06 21:59:20,152 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 21:59:20,153 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 21:59:20,153 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 21:59:20,154 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 21:59:20,168 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:59:20" (1/1) ... [2023-11-06 21:59:20,191 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:59:20" (1/1) ... [2023-11-06 21:59:20,276 INFO L138 Inliner]: procedures = 26, calls = 113, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 648 [2023-11-06 21:59:20,276 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 21:59:20,277 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 21:59:20,277 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 21:59:20,277 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 21:59:20,287 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:59:20" (1/1) ... [2023-11-06 21:59:20,288 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:59:20" (1/1) ... [2023-11-06 21:59:20,297 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:59:20" (1/1) ... [2023-11-06 21:59:20,298 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:59:20" (1/1) ... [2023-11-06 21:59:20,335 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:59:20" (1/1) ... [2023-11-06 21:59:20,341 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:59:20" (1/1) ... [2023-11-06 21:59:20,349 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:59:20" (1/1) ... [2023-11-06 21:59:20,360 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:59:20" (1/1) ... [2023-11-06 21:59:20,372 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 21:59:20,373 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 21:59:20,374 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 21:59:20,374 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 21:59:20,375 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:59:20" (1/1) ... [2023-11-06 21:59:20,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 21:59:20,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e64ba29b-166a-46fc-a566-4e760716d806/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:59:20,426 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e64ba29b-166a-46fc-a566-4e760716d806/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 21:59:20,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e64ba29b-166a-46fc-a566-4e760716d806/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 21:59:20,491 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 21:59:20,491 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-06 21:59:20,492 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-06 21:59:20,492 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 21:59:20,492 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 21:59:20,492 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 21:59:20,713 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 21:59:20,716 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 21:59:21,827 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 21:59:21,838 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 21:59:21,838 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-06 21:59:21,841 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:59:21 BoogieIcfgContainer [2023-11-06 21:59:21,841 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 21:59:21,844 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 21:59:21,845 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 21:59:21,849 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 21:59:21,849 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 09:59:19" (1/3) ... [2023-11-06 21:59:21,850 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ec81cdb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:59:21, skipping insertion in model container [2023-11-06 21:59:21,850 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:59:20" (2/3) ... [2023-11-06 21:59:21,851 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ec81cdb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:59:21, skipping insertion in model container [2023-11-06 21:59:21,851 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:59:21" (3/3) ... [2023-11-06 21:59:21,853 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_fillercode_fillercodesize_ps-cn-250_file-76.i [2023-11-06 21:59:21,874 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 21:59:21,875 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 21:59:21,957 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 21:59:21,967 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;@4709cf88, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 21:59:21,968 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-06 21:59:21,977 INFO L276 IsEmpty]: Start isEmpty. Operand has 259 states, 156 states have (on average 1.5512820512820513) internal successors, (242), 157 states have internal predecessors, (242), 100 states have call successors, (100), 1 states have call predecessors, (100), 1 states have return successors, (100), 100 states have call predecessors, (100), 100 states have call successors, (100) [2023-11-06 21:59:22,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 603 [2023-11-06 21:59:22,035 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:59:22,037 INFO L195 NwaCegarLoop]: trace histogram [100, 100, 100, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:59:22,037 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:59:22,043 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:59:22,043 INFO L85 PathProgramCache]: Analyzing trace with hash 644205438, now seen corresponding path program 1 times [2023-11-06 21:59:22,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:59:22,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414451131] [2023-11-06 21:59:22,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:59:22,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:59:22,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:59:22,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:59:22,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414451131] [2023-11-06 21:59:22,614 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-06 21:59:22,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752406939] [2023-11-06 21:59:22,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:59:22,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:59:22,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e64ba29b-166a-46fc-a566-4e760716d806/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:59:22,619 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e64ba29b-166a-46fc-a566-4e760716d806/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:59:22,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e64ba29b-166a-46fc-a566-4e760716d806/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 21:59:23,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:59:23,109 INFO L262 TraceCheckSpWp]: Trace formula consists of 1376 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-06 21:59:23,137 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:59:23,280 INFO L134 CoverageAnalysis]: Checked inductivity of 19800 backedges. 198 proven. 0 refuted. 0 times theorem prover too weak. 19602 trivial. 0 not checked. [2023-11-06 21:59:23,280 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:59:23,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752406939] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:59:23,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:59:23,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 21:59:23,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763255367] [2023-11-06 21:59:23,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:59:23,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-06 21:59:23,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:59:23,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-06 21:59:23,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 21:59:23,343 INFO L87 Difference]: Start difference. First operand has 259 states, 156 states have (on average 1.5512820512820513) internal successors, (242), 157 states have internal predecessors, (242), 100 states have call successors, (100), 1 states have call predecessors, (100), 1 states have return successors, (100), 100 states have call predecessors, (100), 100 states have call successors, (100) Second operand has 2 states, 2 states have (on average 53.5) internal successors, (107), 2 states have internal predecessors, (107), 2 states have call successors, (100), 2 states have call predecessors, (100), 1 states have return successors, (100), 1 states have call predecessors, (100), 2 states have call successors, (100) [2023-11-06 21:59:23,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:59:23,452 INFO L93 Difference]: Finished difference Result 508 states and 972 transitions. [2023-11-06 21:59:23,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-06 21:59:23,455 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 53.5) internal successors, (107), 2 states have internal predecessors, (107), 2 states have call successors, (100), 2 states have call predecessors, (100), 1 states have return successors, (100), 1 states have call predecessors, (100), 2 states have call successors, (100) Word has length 602 [2023-11-06 21:59:23,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:59:23,471 INFO L225 Difference]: With dead ends: 508 [2023-11-06 21:59:23,472 INFO L226 Difference]: Without dead ends: 252 [2023-11-06 21:59:23,483 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 601 GetRequests, 601 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 21:59:23,489 INFO L413 NwaCegarLoop]: 426 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, 426 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 21:59:23,491 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 426 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 21:59:23,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2023-11-06 21:59:23,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 252. [2023-11-06 21:59:23,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 150 states have (on average 1.5066666666666666) internal successors, (226), 150 states have internal predecessors, (226), 100 states have call successors, (100), 1 states have call predecessors, (100), 1 states have return successors, (100), 100 states have call predecessors, (100), 100 states have call successors, (100) [2023-11-06 21:59:23,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 426 transitions. [2023-11-06 21:59:23,625 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 426 transitions. Word has length 602 [2023-11-06 21:59:23,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:59:23,627 INFO L495 AbstractCegarLoop]: Abstraction has 252 states and 426 transitions. [2023-11-06 21:59:23,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 53.5) internal successors, (107), 2 states have internal predecessors, (107), 2 states have call successors, (100), 2 states have call predecessors, (100), 1 states have return successors, (100), 1 states have call predecessors, (100), 2 states have call successors, (100) [2023-11-06 21:59:23,628 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 426 transitions. [2023-11-06 21:59:23,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 603 [2023-11-06 21:59:23,651 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:59:23,652 INFO L195 NwaCegarLoop]: trace histogram [100, 100, 100, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:59:23,665 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e64ba29b-166a-46fc-a566-4e760716d806/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 21:59:23,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e64ba29b-166a-46fc-a566-4e760716d806/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:59:23,860 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:59:23,860 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:59:23,861 INFO L85 PathProgramCache]: Analyzing trace with hash 234451318, now seen corresponding path program 1 times [2023-11-06 21:59:23,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:59:23,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612551389] [2023-11-06 21:59:23,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:59:23,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:59:24,078 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:59:24,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1440640765] [2023-11-06 21:59:24,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:59:24,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:59:24,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e64ba29b-166a-46fc-a566-4e760716d806/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:59:24,085 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e64ba29b-166a-46fc-a566-4e760716d806/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:59:24,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e64ba29b-166a-46fc-a566-4e760716d806/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 21:59:24,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:59:24,522 INFO L262 TraceCheckSpWp]: Trace formula consists of 1376 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 21:59:24,539 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:59:24,600 INFO L134 CoverageAnalysis]: Checked inductivity of 19800 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19800 trivial. 0 not checked. [2023-11-06 21:59:24,600 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:59:24,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:59:24,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612551389] [2023-11-06 21:59:24,601 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:59:24,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440640765] [2023-11-06 21:59:24,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440640765] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:59:24,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:59:24,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 21:59:24,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623980121] [2023-11-06 21:59:24,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:59:24,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:59:24,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:59:24,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:59:24,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:59:24,607 INFO L87 Difference]: Start difference. First operand 252 states and 426 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 1 states have call successors, (100), 1 states have call predecessors, (100), 1 states have return successors, (100), 1 states have call predecessors, (100), 1 states have call successors, (100) [2023-11-06 21:59:24,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:59:24,650 INFO L93 Difference]: Finished difference Result 501 states and 849 transitions. [2023-11-06 21:59:24,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:59:24,651 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 1 states have call successors, (100), 1 states have call predecessors, (100), 1 states have return successors, (100), 1 states have call predecessors, (100), 1 states have call successors, (100) Word has length 602 [2023-11-06 21:59:24,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:59:24,658 INFO L225 Difference]: With dead ends: 501 [2023-11-06 21:59:24,658 INFO L226 Difference]: Without dead ends: 252 [2023-11-06 21:59:24,660 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 601 GetRequests, 600 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:59:24,661 INFO L413 NwaCegarLoop]: 424 mSDtfsCounter, 0 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 843 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:59:24,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 843 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 21:59:24,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2023-11-06 21:59:24,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 252. [2023-11-06 21:59:24,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 150 states have (on average 1.5) internal successors, (225), 150 states have internal predecessors, (225), 100 states have call successors, (100), 1 states have call predecessors, (100), 1 states have return successors, (100), 100 states have call predecessors, (100), 100 states have call successors, (100) [2023-11-06 21:59:24,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 425 transitions. [2023-11-06 21:59:24,704 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 425 transitions. Word has length 602 [2023-11-06 21:59:24,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:59:24,708 INFO L495 AbstractCegarLoop]: Abstraction has 252 states and 425 transitions. [2023-11-06 21:59:24,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 1 states have call successors, (100), 1 states have call predecessors, (100), 1 states have return successors, (100), 1 states have call predecessors, (100), 1 states have call successors, (100) [2023-11-06 21:59:24,708 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 425 transitions. [2023-11-06 21:59:24,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 606 [2023-11-06 21:59:24,715 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:59:24,739 INFO L195 NwaCegarLoop]: trace histogram [100, 100, 100, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:59:24,758 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e64ba29b-166a-46fc-a566-4e760716d806/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 21:59:24,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e64ba29b-166a-46fc-a566-4e760716d806/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-06 21:59:24,949 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:59:24,950 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:59:24,950 INFO L85 PathProgramCache]: Analyzing trace with hash -137050404, now seen corresponding path program 1 times [2023-11-06 21:59:24,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:59:24,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272692246] [2023-11-06 21:59:24,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:59:24,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:59:25,089 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:59:25,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [440241501] [2023-11-06 21:59:25,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:59:25,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:59:25,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e64ba29b-166a-46fc-a566-4e760716d806/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:59:25,091 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e64ba29b-166a-46fc-a566-4e760716d806/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:59:25,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e64ba29b-166a-46fc-a566-4e760716d806/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 21:59:25,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:59:25,523 INFO L262 TraceCheckSpWp]: Trace formula consists of 1382 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 21:59:25,550 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:59:25,680 INFO L134 CoverageAnalysis]: Checked inductivity of 19800 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19800 trivial. 0 not checked. [2023-11-06 21:59:25,685 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:59:25,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:59:25,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272692246] [2023-11-06 21:59:25,685 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:59:25,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440241501] [2023-11-06 21:59:25,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440241501] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:59:25,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:59:25,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 21:59:25,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508946554] [2023-11-06 21:59:25,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:59:25,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 21:59:25,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:59:25,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 21:59:25,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:59:25,693 INFO L87 Difference]: Start difference. First operand 252 states and 425 transitions. Second operand has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 1 states have call successors, (100), 1 states have call predecessors, (100), 1 states have return successors, (100), 1 states have call predecessors, (100), 1 states have call successors, (100) [2023-11-06 21:59:25,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:59:25,827 INFO L93 Difference]: Finished difference Result 654 states and 1106 transitions. [2023-11-06 21:59:25,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 21:59:25,828 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 1 states have call successors, (100), 1 states have call predecessors, (100), 1 states have return successors, (100), 1 states have call predecessors, (100), 1 states have call successors, (100) Word has length 605 [2023-11-06 21:59:25,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:59:25,838 INFO L225 Difference]: With dead ends: 654 [2023-11-06 21:59:25,838 INFO L226 Difference]: Without dead ends: 405 [2023-11-06 21:59:25,839 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 605 GetRequests, 602 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 21:59:25,841 INFO L413 NwaCegarLoop]: 538 mSDtfsCounter, 240 mSDsluCounter, 940 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 1478 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 21:59:25,841 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [240 Valid, 1478 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 21:59:25,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2023-11-06 21:59:25,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 402. [2023-11-06 21:59:25,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 255 states have (on average 1.5333333333333334) internal successors, (391), 256 states have internal predecessors, (391), 144 states have call successors, (144), 2 states have call predecessors, (144), 2 states have return successors, (144), 143 states have call predecessors, (144), 144 states have call successors, (144) [2023-11-06 21:59:25,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 679 transitions. [2023-11-06 21:59:25,938 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 679 transitions. Word has length 605 [2023-11-06 21:59:25,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:59:25,941 INFO L495 AbstractCegarLoop]: Abstraction has 402 states and 679 transitions. [2023-11-06 21:59:25,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 1 states have call successors, (100), 1 states have call predecessors, (100), 1 states have return successors, (100), 1 states have call predecessors, (100), 1 states have call successors, (100) [2023-11-06 21:59:25,941 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 679 transitions. [2023-11-06 21:59:25,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 607 [2023-11-06 21:59:25,951 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:59:25,952 INFO L195 NwaCegarLoop]: trace histogram [100, 100, 100, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:59:25,969 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e64ba29b-166a-46fc-a566-4e760716d806/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-06 21:59:26,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e64ba29b-166a-46fc-a566-4e760716d806/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-11-06 21:59:26,160 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:59:26,161 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:59:26,161 INFO L85 PathProgramCache]: Analyzing trace with hash -2071833914, now seen corresponding path program 1 times [2023-11-06 21:59:26,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:59:26,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814359123] [2023-11-06 21:59:26,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:59:26,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:59:26,299 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:59:26,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [738053262] [2023-11-06 21:59:26,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:59:26,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:59:26,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e64ba29b-166a-46fc-a566-4e760716d806/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:59:26,302 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e64ba29b-166a-46fc-a566-4e760716d806/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:59:26,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e64ba29b-166a-46fc-a566-4e760716d806/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 21:59:26,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:59:26,719 INFO L262 TraceCheckSpWp]: Trace formula consists of 1385 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 21:59:26,733 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:59:27,730 INFO L134 CoverageAnalysis]: Checked inductivity of 19800 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19800 trivial. 0 not checked. [2023-11-06 21:59:27,730 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:59:27,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:59:27,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814359123] [2023-11-06 21:59:27,731 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:59:27,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738053262] [2023-11-06 21:59:27,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738053262] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:59:27,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:59:27,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 21:59:27,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445503345] [2023-11-06 21:59:27,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:59:27,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 21:59:27,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:59:27,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 21:59:27,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:59:27,736 INFO L87 Difference]: Start difference. First operand 402 states and 679 transitions. Second operand has 4 states, 4 states have (on average 27.25) internal successors, (109), 3 states have internal predecessors, (109), 1 states have call successors, (100), 1 states have call predecessors, (100), 1 states have return successors, (100), 1 states have call predecessors, (100), 1 states have call successors, (100) [2023-11-06 21:59:28,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:59:28,168 INFO L93 Difference]: Finished difference Result 1200 states and 2031 transitions. [2023-11-06 21:59:28,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 21:59:28,169 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 3 states have internal predecessors, (109), 1 states have call successors, (100), 1 states have call predecessors, (100), 1 states have return successors, (100), 1 states have call predecessors, (100), 1 states have call successors, (100) Word has length 606 [2023-11-06 21:59:28,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:59:28,178 INFO L225 Difference]: With dead ends: 1200 [2023-11-06 21:59:28,178 INFO L226 Difference]: Without dead ends: 801 [2023-11-06 21:59:28,180 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 605 GetRequests, 603 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:59:28,181 INFO L413 NwaCegarLoop]: 420 mSDtfsCounter, 125 mSDsluCounter, 631 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 1051 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 21:59:28,182 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 1051 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 21:59:28,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 801 states. [2023-11-06 21:59:28,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 801 to 799. [2023-11-06 21:59:28,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 799 states, 506 states have (on average 1.533596837944664) internal successors, (776), 508 states have internal predecessors, (776), 288 states have call successors, (288), 4 states have call predecessors, (288), 4 states have return successors, (288), 286 states have call predecessors, (288), 288 states have call successors, (288) [2023-11-06 21:59:28,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 1352 transitions. [2023-11-06 21:59:28,300 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 1352 transitions. Word has length 606 [2023-11-06 21:59:28,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:59:28,302 INFO L495 AbstractCegarLoop]: Abstraction has 799 states and 1352 transitions. [2023-11-06 21:59:28,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 3 states have internal predecessors, (109), 1 states have call successors, (100), 1 states have call predecessors, (100), 1 states have return successors, (100), 1 states have call predecessors, (100), 1 states have call successors, (100) [2023-11-06 21:59:28,303 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 1352 transitions. [2023-11-06 21:59:28,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 607 [2023-11-06 21:59:28,309 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:59:28,309 INFO L195 NwaCegarLoop]: trace histogram [100, 100, 100, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:59:28,326 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e64ba29b-166a-46fc-a566-4e760716d806/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 21:59:28,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e64ba29b-166a-46fc-a566-4e760716d806/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:59:28,518 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:59:28,518 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:59:28,518 INFO L85 PathProgramCache]: Analyzing trace with hash -1370769336, now seen corresponding path program 1 times [2023-11-06 21:59:28,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:59:28,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034292655] [2023-11-06 21:59:28,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:59:28,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:59:28,619 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:59:28,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1035193171] [2023-11-06 21:59:28,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:59:28,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:59:28,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e64ba29b-166a-46fc-a566-4e760716d806/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:59:28,621 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e64ba29b-166a-46fc-a566-4e760716d806/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:59:28,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e64ba29b-166a-46fc-a566-4e760716d806/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 21:59:29,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:59:29,065 INFO L262 TraceCheckSpWp]: Trace formula consists of 1383 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 21:59:29,078 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:59:29,148 INFO L134 CoverageAnalysis]: Checked inductivity of 19800 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19800 trivial. 0 not checked. [2023-11-06 21:59:29,149 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:59:29,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:59:29,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034292655] [2023-11-06 21:59:29,149 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:59:29,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035193171] [2023-11-06 21:59:29,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035193171] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:59:29,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:59:29,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 21:59:29,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997272506] [2023-11-06 21:59:29,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:59:29,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:59:29,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:59:29,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:59:29,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:59:29,159 INFO L87 Difference]: Start difference. First operand 799 states and 1352 transitions. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 1 states have call successors, (100), 1 states have call predecessors, (100), 1 states have return successors, (100), 1 states have call predecessors, (100), 1 states have call successors, (100) [2023-11-06 21:59:29,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:59:29,258 INFO L93 Difference]: Finished difference Result 2037 states and 3462 transitions. [2023-11-06 21:59:29,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:59:29,259 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 1 states have call successors, (100), 1 states have call predecessors, (100), 1 states have return successors, (100), 1 states have call predecessors, (100), 1 states have call successors, (100) Word has length 606 [2023-11-06 21:59:29,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:59:29,273 INFO L225 Difference]: With dead ends: 2037 [2023-11-06 21:59:29,274 INFO L226 Difference]: Without dead ends: 1241 [2023-11-06 21:59:29,277 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 605 GetRequests, 604 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:59:29,279 INFO L413 NwaCegarLoop]: 477 mSDtfsCounter, 178 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 893 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:59:29,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 893 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 21:59:29,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1241 states. [2023-11-06 21:59:29,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1241 to 1235. [2023-11-06 21:59:29,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1235 states, 882 states have (on average 1.600907029478458) internal successors, (1412), 888 states have internal predecessors, (1412), 344 states have call successors, (344), 8 states have call predecessors, (344), 8 states have return successors, (344), 338 states have call predecessors, (344), 344 states have call successors, (344) [2023-11-06 21:59:29,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1235 states to 1235 states and 2100 transitions. [2023-11-06 21:59:29,472 INFO L78 Accepts]: Start accepts. Automaton has 1235 states and 2100 transitions. Word has length 606 [2023-11-06 21:59:29,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:59:29,474 INFO L495 AbstractCegarLoop]: Abstraction has 1235 states and 2100 transitions. [2023-11-06 21:59:29,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 1 states have call successors, (100), 1 states have call predecessors, (100), 1 states have return successors, (100), 1 states have call predecessors, (100), 1 states have call successors, (100) [2023-11-06 21:59:29,475 INFO L276 IsEmpty]: Start isEmpty. Operand 1235 states and 2100 transitions. [2023-11-06 21:59:29,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 607 [2023-11-06 21:59:29,481 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:59:29,482 INFO L195 NwaCegarLoop]: trace histogram [100, 100, 100, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:59:29,490 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e64ba29b-166a-46fc-a566-4e760716d806/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-06 21:59:29,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e64ba29b-166a-46fc-a566-4e760716d806/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:59:29,691 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:59:29,691 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:59:29,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1723857718, now seen corresponding path program 1 times [2023-11-06 21:59:29,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:59:29,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848227170] [2023-11-06 21:59:29,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:59:29,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:59:29,772 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:59:29,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1540042440] [2023-11-06 21:59:29,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:59:29,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:59:29,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e64ba29b-166a-46fc-a566-4e760716d806/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:59:29,774 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e64ba29b-166a-46fc-a566-4e760716d806/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:59:29,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e64ba29b-166a-46fc-a566-4e760716d806/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 21:59:30,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:59:30,205 INFO L262 TraceCheckSpWp]: Trace formula consists of 1384 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 21:59:30,218 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:59:30,299 INFO L134 CoverageAnalysis]: Checked inductivity of 19800 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19800 trivial. 0 not checked. [2023-11-06 21:59:30,299 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:59:30,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:59:30,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848227170] [2023-11-06 21:59:30,300 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:59:30,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540042440] [2023-11-06 21:59:30,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540042440] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:59:30,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:59:30,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 21:59:30,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770866553] [2023-11-06 21:59:30,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:59:30,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:59:30,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:59:30,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:59:30,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:59:30,304 INFO L87 Difference]: Start difference. First operand 1235 states and 2100 transitions. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 1 states have call successors, (100), 1 states have call predecessors, (100), 1 states have return successors, (100), 1 states have call predecessors, (100), 1 states have call successors, (100) [2023-11-06 21:59:30,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:59:30,446 INFO L93 Difference]: Finished difference Result 2489 states and 4214 transitions. [2023-11-06 21:59:30,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:59:30,447 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 1 states have call successors, (100), 1 states have call predecessors, (100), 1 states have return successors, (100), 1 states have call predecessors, (100), 1 states have call successors, (100) Word has length 606 [2023-11-06 21:59:30,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:59:30,459 INFO L225 Difference]: With dead ends: 2489 [2023-11-06 21:59:30,459 INFO L226 Difference]: Without dead ends: 1257 [2023-11-06 21:59:30,466 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 605 GetRequests, 604 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:59:30,468 INFO L413 NwaCegarLoop]: 528 mSDtfsCounter, 176 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 942 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:59:30,469 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 942 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 21:59:30,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1257 states. [2023-11-06 21:59:30,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1257 to 1039. [2023-11-06 21:59:30,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1039 states, 742 states have (on average 1.6307277628032344) internal successors, (1210), 744 states have internal predecessors, (1210), 288 states have call successors, (288), 8 states have call predecessors, (288), 8 states have return successors, (288), 286 states have call predecessors, (288), 288 states have call successors, (288) [2023-11-06 21:59:30,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1039 states to 1039 states and 1786 transitions. [2023-11-06 21:59:30,643 INFO L78 Accepts]: Start accepts. Automaton has 1039 states and 1786 transitions. Word has length 606 [2023-11-06 21:59:30,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:59:30,645 INFO L495 AbstractCegarLoop]: Abstraction has 1039 states and 1786 transitions. [2023-11-06 21:59:30,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 1 states have call successors, (100), 1 states have call predecessors, (100), 1 states have return successors, (100), 1 states have call predecessors, (100), 1 states have call successors, (100) [2023-11-06 21:59:30,645 INFO L276 IsEmpty]: Start isEmpty. Operand 1039 states and 1786 transitions. [2023-11-06 21:59:30,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 607 [2023-11-06 21:59:30,652 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:59:30,652 INFO L195 NwaCegarLoop]: trace histogram [100, 100, 100, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:59:30,665 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e64ba29b-166a-46fc-a566-4e760716d806/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 21:59:30,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e64ba29b-166a-46fc-a566-4e760716d806/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:59:30,860 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:59:30,861 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:59:30,861 INFO L85 PathProgramCache]: Analyzing trace with hash 882165836, now seen corresponding path program 1 times [2023-11-06 21:59:30,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:59:30,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711394169] [2023-11-06 21:59:30,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:59:30,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:59:30,945 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:59:30,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [744432068] [2023-11-06 21:59:30,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:59:30,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:59:30,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e64ba29b-166a-46fc-a566-4e760716d806/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:59:30,948 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e64ba29b-166a-46fc-a566-4e760716d806/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:59:30,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e64ba29b-166a-46fc-a566-4e760716d806/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 21:59:31,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:59:31,387 INFO L262 TraceCheckSpWp]: Trace formula consists of 1383 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 21:59:31,400 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:59:32,230 INFO L134 CoverageAnalysis]: Checked inductivity of 19800 backedges. 6217 proven. 240 refuted. 0 times theorem prover too weak. 13343 trivial. 0 not checked. [2023-11-06 21:59:32,231 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:59:32,857 INFO L134 CoverageAnalysis]: Checked inductivity of 19800 backedges. 57 proven. 240 refuted. 0 times theorem prover too weak. 19503 trivial. 0 not checked. [2023-11-06 21:59:32,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:59:32,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711394169] [2023-11-06 21:59:32,858 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:59:32,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744432068] [2023-11-06 21:59:32,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744432068] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:59:32,858 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 21:59:32,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-06 21:59:32,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278633757] [2023-11-06 21:59:32,859 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 21:59:32,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 21:59:32,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:59:32,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 21:59:32,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-06 21:59:32,863 INFO L87 Difference]: Start difference. First operand 1039 states and 1786 transitions. Second operand has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 7 states have internal predecessors, (118), 2 states have call successors, (180), 2 states have call predecessors, (180), 4 states have return successors, (181), 2 states have call predecessors, (181), 2 states have call successors, (181) [2023-11-06 21:59:33,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:59:33,505 INFO L93 Difference]: Finished difference Result 2115 states and 3605 transitions. [2023-11-06 21:59:33,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 21:59:33,508 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 7 states have internal predecessors, (118), 2 states have call successors, (180), 2 states have call predecessors, (180), 4 states have return successors, (181), 2 states have call predecessors, (181), 2 states have call successors, (181) Word has length 606 [2023-11-06 21:59:33,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:59:33,518 INFO L225 Difference]: With dead ends: 2115 [2023-11-06 21:59:33,518 INFO L226 Difference]: Without dead ends: 1079 [2023-11-06 21:59:33,521 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1214 GetRequests, 1204 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-06 21:59:33,523 INFO L413 NwaCegarLoop]: 317 mSDtfsCounter, 194 mSDsluCounter, 433 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 750 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-06 21:59:33,523 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 750 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 501 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-06 21:59:33,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1079 states. [2023-11-06 21:59:33,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1079 to 1055. [2023-11-06 21:59:33,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1055 states, 754 states have (on average 1.5994694960212201) internal successors, (1206), 756 states have internal predecessors, (1206), 288 states have call successors, (288), 12 states have call predecessors, (288), 12 states have return successors, (288), 286 states have call predecessors, (288), 288 states have call successors, (288) [2023-11-06 21:59:33,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1055 states to 1055 states and 1782 transitions. [2023-11-06 21:59:33,646 INFO L78 Accepts]: Start accepts. Automaton has 1055 states and 1782 transitions. Word has length 606 [2023-11-06 21:59:33,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:59:33,647 INFO L495 AbstractCegarLoop]: Abstraction has 1055 states and 1782 transitions. [2023-11-06 21:59:33,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 7 states have internal predecessors, (118), 2 states have call successors, (180), 2 states have call predecessors, (180), 4 states have return successors, (181), 2 states have call predecessors, (181), 2 states have call successors, (181) [2023-11-06 21:59:33,648 INFO L276 IsEmpty]: Start isEmpty. Operand 1055 states and 1782 transitions. [2023-11-06 21:59:33,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 608 [2023-11-06 21:59:33,654 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:59:33,654 INFO L195 NwaCegarLoop]: trace histogram [100, 100, 100, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:59:33,668 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e64ba29b-166a-46fc-a566-4e760716d806/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 21:59:33,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e64ba29b-166a-46fc-a566-4e760716d806/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:59:33,863 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:59:33,864 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:59:33,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1612186356, now seen corresponding path program 1 times [2023-11-06 21:59:33,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:59:33,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730079048] [2023-11-06 21:59:33,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:59:33,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:59:33,956 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:59:33,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1502803896] [2023-11-06 21:59:33,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:59:33,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:59:33,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e64ba29b-166a-46fc-a566-4e760716d806/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:59:33,958 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e64ba29b-166a-46fc-a566-4e760716d806/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:59:33,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e64ba29b-166a-46fc-a566-4e760716d806/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 21:59:34,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:59:34,481 INFO L262 TraceCheckSpWp]: Trace formula consists of 1383 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 21:59:34,494 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:59:34,735 INFO L134 CoverageAnalysis]: Checked inductivity of 19800 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19800 trivial. 0 not checked. [2023-11-06 21:59:34,736 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:59:34,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:59:34,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730079048] [2023-11-06 21:59:34,736 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:59:34,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502803896] [2023-11-06 21:59:34,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502803896] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:59:34,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:59:34,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 21:59:34,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112110249] [2023-11-06 21:59:34,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:59:34,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 21:59:34,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:59:34,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 21:59:34,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:59:34,741 INFO L87 Difference]: Start difference. First operand 1055 states and 1782 transitions. Second operand has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 1 states have call successors, (100), 1 states have call predecessors, (100), 1 states have return successors, (100), 1 states have call predecessors, (100), 1 states have call successors, (100) [2023-11-06 21:59:35,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:59:35,410 INFO L93 Difference]: Finished difference Result 3103 states and 5077 transitions. [2023-11-06 21:59:35,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 21:59:35,411 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 1 states have call successors, (100), 1 states have call predecessors, (100), 1 states have return successors, (100), 1 states have call predecessors, (100), 1 states have call successors, (100) Word has length 607 [2023-11-06 21:59:35,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:59:35,429 INFO L225 Difference]: With dead ends: 3103 [2023-11-06 21:59:35,430 INFO L226 Difference]: Without dead ends: 2051 [2023-11-06 21:59:35,434 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 608 GetRequests, 605 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 21:59:35,436 INFO L413 NwaCegarLoop]: 779 mSDtfsCounter, 563 mSDsluCounter, 916 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 563 SdHoareTripleChecker+Valid, 1695 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 21:59:35,436 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [563 Valid, 1695 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 21:59:35,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2051 states. [2023-11-06 21:59:35,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2051 to 2039. [2023-11-06 21:59:35,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2039 states, 1334 states have (on average 1.4587706146926536) internal successors, (1946), 1344 states have internal predecessors, (1946), 664 states have call successors, (664), 40 states have call predecessors, (664), 40 states have return successors, (664), 654 states have call predecessors, (664), 664 states have call successors, (664) [2023-11-06 21:59:35,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2039 states to 2039 states and 3274 transitions. [2023-11-06 21:59:35,818 INFO L78 Accepts]: Start accepts. Automaton has 2039 states and 3274 transitions. Word has length 607 [2023-11-06 21:59:35,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:59:35,819 INFO L495 AbstractCegarLoop]: Abstraction has 2039 states and 3274 transitions. [2023-11-06 21:59:35,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 1 states have call successors, (100), 1 states have call predecessors, (100), 1 states have return successors, (100), 1 states have call predecessors, (100), 1 states have call successors, (100) [2023-11-06 21:59:35,820 INFO L276 IsEmpty]: Start isEmpty. Operand 2039 states and 3274 transitions. [2023-11-06 21:59:35,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 608 [2023-11-06 21:59:35,826 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:59:35,827 INFO L195 NwaCegarLoop]: trace histogram [100, 100, 100, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:59:35,835 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e64ba29b-166a-46fc-a566-4e760716d806/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 21:59:36,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e64ba29b-166a-46fc-a566-4e760716d806/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-06 21:59:36,035 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:59:36,036 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:59:36,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1323498036, now seen corresponding path program 1 times [2023-11-06 21:59:36,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:59:36,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729451104] [2023-11-06 21:59:36,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:59:36,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:59:36,111 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:59:36,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [308091799] [2023-11-06 21:59:36,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:59:36,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:59:36,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e64ba29b-166a-46fc-a566-4e760716d806/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:59:36,113 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e64ba29b-166a-46fc-a566-4e760716d806/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:59:36,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e64ba29b-166a-46fc-a566-4e760716d806/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 21:59:36,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:59:36,681 INFO L262 TraceCheckSpWp]: Trace formula consists of 1385 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 21:59:36,693 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:59:38,302 INFO L134 CoverageAnalysis]: Checked inductivity of 19800 backedges. 9693 proven. 174 refuted. 0 times theorem prover too weak. 9933 trivial. 0 not checked. [2023-11-06 21:59:38,302 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:59:39,098 INFO L134 CoverageAnalysis]: Checked inductivity of 19800 backedges. 123 proven. 174 refuted. 0 times theorem prover too weak. 19503 trivial. 0 not checked. [2023-11-06 21:59:39,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:59:39,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729451104] [2023-11-06 21:59:39,099 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:59:39,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308091799] [2023-11-06 21:59:39,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308091799] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:59:39,099 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 21:59:39,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2023-11-06 21:59:39,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543831379] [2023-11-06 21:59:39,103 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 21:59:39,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-06 21:59:39,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:59:39,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-06 21:59:39,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2023-11-06 21:59:39,107 INFO L87 Difference]: Start difference. First operand 2039 states and 3274 transitions. Second operand has 11 states, 11 states have (on average 15.0) internal successors, (165), 11 states have internal predecessors, (165), 3 states have call successors, (158), 2 states have call predecessors, (158), 4 states have return successors, (159), 3 states have call predecessors, (159), 3 states have call successors, (159) [2023-11-06 21:59:45,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:59:45,423 INFO L93 Difference]: Finished difference Result 9579 states and 14994 transitions. [2023-11-06 21:59:45,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-06 21:59:45,424 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 15.0) internal successors, (165), 11 states have internal predecessors, (165), 3 states have call successors, (158), 2 states have call predecessors, (158), 4 states have return successors, (159), 3 states have call predecessors, (159), 3 states have call successors, (159) Word has length 607 [2023-11-06 21:59:45,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:59:45,481 INFO L225 Difference]: With dead ends: 9579 [2023-11-06 21:59:45,481 INFO L226 Difference]: Without dead ends: 7543 [2023-11-06 21:59:45,492 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1234 GetRequests, 1206 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=252, Invalid=618, Unknown=0, NotChecked=0, Total=870 [2023-11-06 21:59:45,492 INFO L413 NwaCegarLoop]: 644 mSDtfsCounter, 1271 mSDsluCounter, 1876 mSDsCounter, 0 mSdLazyCounter, 2044 mSolverCounterSat, 623 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1313 SdHoareTripleChecker+Valid, 2520 SdHoareTripleChecker+Invalid, 2667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 623 IncrementalHoareTripleChecker+Valid, 2044 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2023-11-06 21:59:45,493 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1313 Valid, 2520 Invalid, 2667 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [623 Valid, 2044 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2023-11-06 21:59:45,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7543 states. [2023-11-06 21:59:46,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7543 to 7169. [2023-11-06 21:59:46,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7169 states, 4880 states have (on average 1.451639344262295) internal successors, (7084), 4924 states have internal predecessors, (7084), 2112 states have call successors, (2112), 176 states have call predecessors, (2112), 176 states have return successors, (2112), 2068 states have call predecessors, (2112), 2112 states have call successors, (2112) [2023-11-06 21:59:46,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7169 states to 7169 states and 11308 transitions. [2023-11-06 21:59:46,833 INFO L78 Accepts]: Start accepts. Automaton has 7169 states and 11308 transitions. Word has length 607 [2023-11-06 21:59:46,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:59:46,835 INFO L495 AbstractCegarLoop]: Abstraction has 7169 states and 11308 transitions. [2023-11-06 21:59:46,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 15.0) internal successors, (165), 11 states have internal predecessors, (165), 3 states have call successors, (158), 2 states have call predecessors, (158), 4 states have return successors, (159), 3 states have call predecessors, (159), 3 states have call successors, (159) [2023-11-06 21:59:46,836 INFO L276 IsEmpty]: Start isEmpty. Operand 7169 states and 11308 transitions. [2023-11-06 21:59:46,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 609 [2023-11-06 21:59:46,846 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:59:46,846 INFO L195 NwaCegarLoop]: trace histogram [100, 100, 100, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:59:46,860 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e64ba29b-166a-46fc-a566-4e760716d806/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-06 21:59:47,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e64ba29b-166a-46fc-a566-4e760716d806/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:59:47,055 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:59:47,055 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:59:47,055 INFO L85 PathProgramCache]: Analyzing trace with hash 1843652523, now seen corresponding path program 1 times [2023-11-06 21:59:47,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:59:47,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823320813] [2023-11-06 21:59:47,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:59:47,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:59:47,202 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:59:47,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [865828119] [2023-11-06 21:59:47,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:59:47,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:59:47,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e64ba29b-166a-46fc-a566-4e760716d806/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:59:47,205 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e64ba29b-166a-46fc-a566-4e760716d806/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:59:47,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e64ba29b-166a-46fc-a566-4e760716d806/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 21:59:47,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:59:47,706 INFO L262 TraceCheckSpWp]: Trace formula consists of 1384 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 21:59:47,725 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:59:47,805 INFO L134 CoverageAnalysis]: Checked inductivity of 19800 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19800 trivial. 0 not checked. [2023-11-06 21:59:47,805 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:59:47,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:59:47,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823320813] [2023-11-06 21:59:47,806 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:59:47,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865828119] [2023-11-06 21:59:47,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865828119] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:59:47,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:59:47,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 21:59:47,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290691877] [2023-11-06 21:59:47,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:59:47,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:59:47,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:59:47,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:59:47,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:59:47,812 INFO L87 Difference]: Start difference. First operand 7169 states and 11308 transitions. Second operand has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 1 states have call successors, (100), 1 states have call predecessors, (100), 1 states have return successors, (100), 1 states have call predecessors, (100), 1 states have call successors, (100) [2023-11-06 21:59:49,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:59:49,811 INFO L93 Difference]: Finished difference Result 21485 states and 33886 transitions. [2023-11-06 21:59:49,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:59:49,812 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 1 states have call successors, (100), 1 states have call predecessors, (100), 1 states have return successors, (100), 1 states have call predecessors, (100), 1 states have call successors, (100) Word has length 608 [2023-11-06 21:59:49,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:59:49,917 INFO L225 Difference]: With dead ends: 21485 [2023-11-06 21:59:49,917 INFO L226 Difference]: Without dead ends: 14319 [2023-11-06 21:59:49,941 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 607 GetRequests, 606 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:59:49,942 INFO L413 NwaCegarLoop]: 729 mSDtfsCounter, 394 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 394 SdHoareTripleChecker+Valid, 1140 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:59:49,943 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [394 Valid, 1140 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 21:59:49,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14319 states. [2023-11-06 21:59:52,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14319 to 14293. [2023-11-06 21:59:52,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14293 states, 9716 states have (on average 1.442980650473446) internal successors, (14020), 9804 states have internal predecessors, (14020), 4224 states have call successors, (4224), 352 states have call predecessors, (4224), 352 states have return successors, (4224), 4136 states have call predecessors, (4224), 4224 states have call successors, (4224) [2023-11-06 21:59:52,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14293 states to 14293 states and 22468 transitions. [2023-11-06 21:59:52,694 INFO L78 Accepts]: Start accepts. Automaton has 14293 states and 22468 transitions. Word has length 608 [2023-11-06 21:59:52,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:59:52,696 INFO L495 AbstractCegarLoop]: Abstraction has 14293 states and 22468 transitions. [2023-11-06 21:59:52,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 1 states have call successors, (100), 1 states have call predecessors, (100), 1 states have return successors, (100), 1 states have call predecessors, (100), 1 states have call successors, (100) [2023-11-06 21:59:52,696 INFO L276 IsEmpty]: Start isEmpty. Operand 14293 states and 22468 transitions. [2023-11-06 21:59:52,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 609 [2023-11-06 21:59:52,707 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:59:52,707 INFO L195 NwaCegarLoop]: trace histogram [100, 100, 100, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:59:52,716 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e64ba29b-166a-46fc-a566-4e760716d806/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-06 21:59:52,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e64ba29b-166a-46fc-a566-4e760716d806/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-06 21:59:52,916 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:59:52,917 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:59:52,917 INFO L85 PathProgramCache]: Analyzing trace with hash -457170067, now seen corresponding path program 1 times [2023-11-06 21:59:52,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:59:52,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230373869] [2023-11-06 21:59:52,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:59:52,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:59:52,994 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:59:52,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1827357753] [2023-11-06 21:59:52,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:59:52,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:59:52,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e64ba29b-166a-46fc-a566-4e760716d806/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:59:52,996 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e64ba29b-166a-46fc-a566-4e760716d806/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:59:53,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e64ba29b-166a-46fc-a566-4e760716d806/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-06 21:59:53,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:59:53,509 INFO L262 TraceCheckSpWp]: Trace formula consists of 1386 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 21:59:53,520 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:59:54,310 INFO L134 CoverageAnalysis]: Checked inductivity of 19800 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19800 trivial. 0 not checked. [2023-11-06 21:59:54,310 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:59:54,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:59:54,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230373869] [2023-11-06 21:59:54,311 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:59:54,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827357753] [2023-11-06 21:59:54,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827357753] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:59:54,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:59:54,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 21:59:54,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310893685] [2023-11-06 21:59:54,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:59:54,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:59:54,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:59:54,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:59:54,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:59:54,315 INFO L87 Difference]: Start difference. First operand 14293 states and 22468 transitions. Second operand has 3 states, 3 states have (on average 37.0) internal successors, (111), 2 states have internal predecessors, (111), 1 states have call successors, (100), 1 states have call predecessors, (100), 1 states have return successors, (100), 1 states have call predecessors, (100), 1 states have call successors, (100) [2023-11-06 21:59:57,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:59:57,051 INFO L93 Difference]: Finished difference Result 35749 states and 56238 transitions. [2023-11-06 21:59:57,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:59:57,052 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 2 states have internal predecessors, (111), 1 states have call successors, (100), 1 states have call predecessors, (100), 1 states have return successors, (100), 1 states have call predecessors, (100), 1 states have call successors, (100) Word has length 608 [2023-11-06 21:59:57,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:59:57,132 INFO L225 Difference]: With dead ends: 35749 [2023-11-06 21:59:57,132 INFO L226 Difference]: Without dead ends: 21459 [2023-11-06 21:59:57,178 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 607 GetRequests, 606 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:59:57,179 INFO L413 NwaCegarLoop]: 415 mSDtfsCounter, 147 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 824 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:59:57,179 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 824 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 21:59:57,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21459 states. [2023-11-06 22:00:00,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21459 to 21433. [2023-11-06 22:00:00,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21433 states, 14568 states have (on average 1.4439868204283361) internal successors, (21036), 14700 states have internal predecessors, (21036), 6336 states have call successors, (6336), 528 states have call predecessors, (6336), 528 states have return successors, (6336), 6204 states have call predecessors, (6336), 6336 states have call successors, (6336) [2023-11-06 22:00:00,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21433 states to 21433 states and 33708 transitions. [2023-11-06 22:00:00,535 INFO L78 Accepts]: Start accepts. Automaton has 21433 states and 33708 transitions. Word has length 608 [2023-11-06 22:00:00,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:00:00,537 INFO L495 AbstractCegarLoop]: Abstraction has 21433 states and 33708 transitions. [2023-11-06 22:00:00,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 2 states have internal predecessors, (111), 1 states have call successors, (100), 1 states have call predecessors, (100), 1 states have return successors, (100), 1 states have call predecessors, (100), 1 states have call successors, (100) [2023-11-06 22:00:00,537 INFO L276 IsEmpty]: Start isEmpty. Operand 21433 states and 33708 transitions. [2023-11-06 22:00:00,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 609 [2023-11-06 22:00:00,557 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:00:00,557 INFO L195 NwaCegarLoop]: trace histogram [100, 100, 100, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:00:00,571 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e64ba29b-166a-46fc-a566-4e760716d806/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-06 22:00:00,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e64ba29b-166a-46fc-a566-4e760716d806/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-06 22:00:00,766 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:00:00,767 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:00:00,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1760763344, now seen corresponding path program 1 times [2023-11-06 22:00:00,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:00:00,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522764585] [2023-11-06 22:00:00,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:00:00,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:00:00,858 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:00:00,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2141811345] [2023-11-06 22:00:00,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:00:00,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:00:00,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e64ba29b-166a-46fc-a566-4e760716d806/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:00:00,860 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e64ba29b-166a-46fc-a566-4e760716d806/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:00:00,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e64ba29b-166a-46fc-a566-4e760716d806/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-06 22:00:01,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:00:01,512 INFO L262 TraceCheckSpWp]: Trace formula consists of 1386 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-06 22:00:01,541 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:00:05,878 INFO L134 CoverageAnalysis]: Checked inductivity of 19800 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19800 trivial. 0 not checked. [2023-11-06 22:00:05,879 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:00:05,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:00:05,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522764585] [2023-11-06 22:00:05,879 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:00:05,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141811345] [2023-11-06 22:00:05,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141811345] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:00:05,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:00:05,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-06 22:00:05,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431560702] [2023-11-06 22:00:05,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:00:05,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:00:05,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:00:05,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:00:05,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:00:05,884 INFO L87 Difference]: Start difference. First operand 21433 states and 33708 transitions. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 6 states have internal predecessors, (111), 1 states have call successors, (100), 1 states have call predecessors, (100), 1 states have return successors, (100), 1 states have call predecessors, (100), 1 states have call successors, (100) [2023-11-06 22:00:20,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:00:20,709 INFO L93 Difference]: Finished difference Result 131831 states and 207061 transitions. [2023-11-06 22:00:20,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-06 22:00:20,710 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 6 states have internal predecessors, (111), 1 states have call successors, (100), 1 states have call predecessors, (100), 1 states have return successors, (100), 1 states have call predecessors, (100), 1 states have call successors, (100) Word has length 608 [2023-11-06 22:00:20,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:00:21,237 INFO L225 Difference]: With dead ends: 131831 [2023-11-06 22:00:21,237 INFO L226 Difference]: Without dead ends: 110401 [2023-11-06 22:00:21,332 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 616 GetRequests, 602 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2023-11-06 22:00:21,333 INFO L413 NwaCegarLoop]: 1198 mSDtfsCounter, 1554 mSDsluCounter, 2860 mSDsCounter, 0 mSdLazyCounter, 2164 mSolverCounterSat, 809 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1554 SdHoareTripleChecker+Valid, 4058 SdHoareTripleChecker+Invalid, 2973 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 809 IncrementalHoareTripleChecker+Valid, 2164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-11-06 22:00:21,334 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1554 Valid, 4058 Invalid, 2973 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [809 Valid, 2164 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-11-06 22:00:21,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110401 states. [2023-11-06 22:00:34,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110401 to 75075. [2023-11-06 22:00:34,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75075 states, 51050 states have (on average 1.4371008814887365) internal successors, (73364), 51512 states have internal predecessors, (73364), 22176 states have call successors, (22176), 1848 states have call predecessors, (22176), 1848 states have return successors, (22176), 21714 states have call predecessors, (22176), 22176 states have call successors, (22176) [2023-11-06 22:00:35,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75075 states to 75075 states and 117716 transitions. [2023-11-06 22:00:35,470 INFO L78 Accepts]: Start accepts. Automaton has 75075 states and 117716 transitions. Word has length 608 [2023-11-06 22:00:35,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:00:35,471 INFO L495 AbstractCegarLoop]: Abstraction has 75075 states and 117716 transitions. [2023-11-06 22:00:35,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 6 states have internal predecessors, (111), 1 states have call successors, (100), 1 states have call predecessors, (100), 1 states have return successors, (100), 1 states have call predecessors, (100), 1 states have call successors, (100) [2023-11-06 22:00:35,472 INFO L276 IsEmpty]: Start isEmpty. Operand 75075 states and 117716 transitions. [2023-11-06 22:00:35,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 609 [2023-11-06 22:00:35,492 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:00:35,492 INFO L195 NwaCegarLoop]: trace histogram [100, 100, 100, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:00:35,509 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e64ba29b-166a-46fc-a566-4e760716d806/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-06 22:00:35,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e64ba29b-166a-46fc-a566-4e760716d806/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-06 22:00:35,705 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:00:35,706 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:00:35,706 INFO L85 PathProgramCache]: Analyzing trace with hash -1080704974, now seen corresponding path program 1 times [2023-11-06 22:00:35,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:00:35,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389060346] [2023-11-06 22:00:35,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:00:35,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:00:35,789 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:00:35,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [933513429] [2023-11-06 22:00:35,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:00:35,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:00:35,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e64ba29b-166a-46fc-a566-4e760716d806/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:00:35,791 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e64ba29b-166a-46fc-a566-4e760716d806/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:00:35,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e64ba29b-166a-46fc-a566-4e760716d806/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-06 22:00:36,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:00:36,385 INFO L262 TraceCheckSpWp]: Trace formula consists of 1386 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 22:00:36,399 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:00:37,444 INFO L134 CoverageAnalysis]: Checked inductivity of 19800 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19800 trivial. 0 not checked. [2023-11-06 22:00:37,444 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:00:37,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:00:37,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389060346] [2023-11-06 22:00:37,445 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:00:37,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933513429] [2023-11-06 22:00:37,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933513429] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:00:37,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:00:37,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 22:00:37,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858805878] [2023-11-06 22:00:37,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:00:37,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:00:37,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:00:37,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:00:37,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:00:37,448 INFO L87 Difference]: Start difference. First operand 75075 states and 117716 transitions. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 5 states have internal predecessors, (111), 1 states have call successors, (100), 1 states have call predecessors, (100), 1 states have return successors, (100), 1 states have call predecessors, (100), 1 states have call successors, (100)