./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-59.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb32a358-ccdd-40bc-ace1-ca45cfbd1957/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb32a358-ccdd-40bc-ace1-ca45cfbd1957/bin/uautomizer-verify-uTZkv6EMXl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb32a358-ccdd-40bc-ace1-ca45cfbd1957/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb32a358-ccdd-40bc-ace1-ca45cfbd1957/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-59.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb32a358-ccdd-40bc-ace1-ca45cfbd1957/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb32a358-ccdd-40bc-ace1-ca45cfbd1957/bin/uautomizer-verify-uTZkv6EMXl --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c3eff42a8b8c884ae11f90d187410b4308f7ccc8d2492e13c8b7c80478f2454e --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:08:24,106 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:08:24,226 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb32a358-ccdd-40bc-ace1-ca45cfbd1957/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-12 02:08:24,231 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:08:24,232 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:08:24,258 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:08:24,259 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:08:24,260 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:08:24,260 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:08:24,261 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:08:24,262 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:08:24,262 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:08:24,263 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:08:24,264 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:08:24,264 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 02:08:24,265 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:08:24,265 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:08:24,266 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:08:24,266 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:08:24,267 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 02:08:24,267 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:08:24,268 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 02:08:24,269 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:08:24,269 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 02:08:24,270 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:08:24,270 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:08:24,271 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:08:24,271 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:08:24,272 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:08:24,272 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:08:24,273 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:08:24,273 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 02:08:24,274 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:08:24,274 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:08:24,275 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:08:24,275 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 02:08:24,276 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:08:24,276 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:08:24,276 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:08:24,277 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_bb32a358-ccdd-40bc-ace1-ca45cfbd1957/bin/uautomizer-verify-uTZkv6EMXl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb32a358-ccdd-40bc-ace1-ca45cfbd1957/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c3eff42a8b8c884ae11f90d187410b4308f7ccc8d2492e13c8b7c80478f2454e [2023-11-12 02:08:24,581 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:08:24,626 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:08:24,629 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:08:24,632 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:08:24,632 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:08:24,634 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb32a358-ccdd-40bc-ace1-ca45cfbd1957/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-59.i [2023-11-12 02:08:27,622 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:08:27,989 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:08:27,992 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb32a358-ccdd-40bc-ace1-ca45cfbd1957/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-59.i [2023-11-12 02:08:28,016 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb32a358-ccdd-40bc-ace1-ca45cfbd1957/bin/uautomizer-verify-uTZkv6EMXl/data/3b1b90fee/141897af69d543ebba3c729a151be2ad/FLAG4cf27aab0 [2023-11-12 02:08:28,037 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb32a358-ccdd-40bc-ace1-ca45cfbd1957/bin/uautomizer-verify-uTZkv6EMXl/data/3b1b90fee/141897af69d543ebba3c729a151be2ad [2023-11-12 02:08:28,043 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:08:28,045 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:08:28,047 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:08:28,048 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:08:28,053 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:08:28,056 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:08:28" (1/1) ... [2023-11-12 02:08:28,059 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54165d16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:08:28, skipping insertion in model container [2023-11-12 02:08:28,059 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:08:28" (1/1) ... [2023-11-12 02:08:28,126 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:08:28,309 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_bb32a358-ccdd-40bc-ace1-ca45cfbd1957/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-59.i[916,929] [2023-11-12 02:08:28,536 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:08:28,563 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:08:28,576 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_bb32a358-ccdd-40bc-ace1-ca45cfbd1957/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-59.i[916,929] [2023-11-12 02:08:28,679 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:08:28,729 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:08:28,748 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:08:28 WrapperNode [2023-11-12 02:08:28,748 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:08:28,750 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:08:28,750 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:08:28,751 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:08:28,759 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:08:28" (1/1) ... [2023-11-12 02:08:28,821 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:08:28" (1/1) ... [2023-11-12 02:08:28,943 INFO L138 Inliner]: procedures = 26, calls = 129, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 887 [2023-11-12 02:08:28,944 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:08:28,945 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:08:28,945 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:08:28,945 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:08:28,956 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:08:28" (1/1) ... [2023-11-12 02:08:28,957 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:08:28" (1/1) ... [2023-11-12 02:08:28,977 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:08:28" (1/1) ... [2023-11-12 02:08:28,977 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:08:28" (1/1) ... [2023-11-12 02:08:29,025 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:08:28" (1/1) ... [2023-11-12 02:08:29,034 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:08:28" (1/1) ... [2023-11-12 02:08:29,042 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:08:28" (1/1) ... [2023-11-12 02:08:29,051 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:08:28" (1/1) ... [2023-11-12 02:08:29,065 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:08:29,066 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:08:29,067 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:08:29,067 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:08:29,068 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:08:28" (1/1) ... [2023-11-12 02:08:29,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:08:29,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb32a358-ccdd-40bc-ace1-ca45cfbd1957/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:08:29,107 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb32a358-ccdd-40bc-ace1-ca45cfbd1957/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:08:29,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb32a358-ccdd-40bc-ace1-ca45cfbd1957/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:08:29,158 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:08:29,158 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-12 02:08:29,158 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-12 02:08:29,159 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:08:29,159 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:08:29,159 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:08:29,346 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:08:29,348 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:08:30,833 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:08:30,850 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:08:30,854 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-12 02:08:30,858 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:08:30 BoogieIcfgContainer [2023-11-12 02:08:30,859 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:08:30,863 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:08:30,863 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:08:30,867 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:08:30,867 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:08:28" (1/3) ... [2023-11-12 02:08:30,868 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a16217c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:08:30, skipping insertion in model container [2023-11-12 02:08:30,869 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:08:28" (2/3) ... [2023-11-12 02:08:30,870 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a16217c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:08:30, skipping insertion in model container [2023-11-12 02:08:30,871 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:08:30" (3/3) ... [2023-11-12 02:08:30,872 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_fillercode_fillercodesize_ps-cn-500_file-59.i [2023-11-12 02:08:30,893 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:08:30,894 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 02:08:30,964 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:08:30,972 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=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1edb8686, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:08:30,972 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 02:08:30,979 INFO L276 IsEmpty]: Start isEmpty. Operand has 353 states, 234 states have (on average 1.623931623931624) internal successors, (380), 235 states have internal predecessors, (380), 116 states have call successors, (116), 1 states have call predecessors, (116), 1 states have return successors, (116), 116 states have call predecessors, (116), 116 states have call successors, (116) [2023-11-12 02:08:31,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 732 [2023-11-12 02:08:31,028 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:08:31,030 INFO L195 NwaCegarLoop]: trace histogram [116, 116, 116, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:08:31,030 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:08:31,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:08:31,037 INFO L85 PathProgramCache]: Analyzing trace with hash 324270179, now seen corresponding path program 1 times [2023-11-12 02:08:31,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:08:31,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142108605] [2023-11-12 02:08:31,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:08:31,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:08:31,549 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:08:31,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [715226386] [2023-11-12 02:08:31,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:08:31,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:08:31,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb32a358-ccdd-40bc-ace1-ca45cfbd1957/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:08:31,554 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb32a358-ccdd-40bc-ace1-ca45cfbd1957/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:08:31,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb32a358-ccdd-40bc-ace1-ca45cfbd1957/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 02:08:32,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:08:32,205 INFO L262 TraceCheckSpWp]: Trace formula consists of 1722 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-12 02:08:32,246 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:08:34,876 INFO L134 CoverageAnalysis]: Checked inductivity of 26680 backedges. 10320 proven. 0 refuted. 0 times theorem prover too weak. 16360 trivial. 0 not checked. [2023-11-12 02:08:34,877 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:08:34,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:08:34,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142108605] [2023-11-12 02:08:34,878 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:08:34,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715226386] [2023-11-12 02:08:34,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715226386] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:08:34,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:08:34,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:08:34,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353803659] [2023-11-12 02:08:34,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:08:34,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:08:34,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:08:34,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:08:34,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:08:34,935 INFO L87 Difference]: Start difference. First operand has 353 states, 234 states have (on average 1.623931623931624) internal successors, (380), 235 states have internal predecessors, (380), 116 states have call successors, (116), 1 states have call predecessors, (116), 1 states have return successors, (116), 116 states have call predecessors, (116), 116 states have call successors, (116) Second operand has 4 states, 4 states have (on average 39.25) internal successors, (157), 3 states have internal predecessors, (157), 2 states have call successors, (116), 2 states have call predecessors, (116), 2 states have return successors, (116), 2 states have call predecessors, (116), 2 states have call successors, (116) [2023-11-12 02:08:35,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:08:35,157 INFO L93 Difference]: Finished difference Result 1044 states and 2054 transitions. [2023-11-12 02:08:35,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:08:35,160 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 39.25) internal successors, (157), 3 states have internal predecessors, (157), 2 states have call successors, (116), 2 states have call predecessors, (116), 2 states have return successors, (116), 2 states have call predecessors, (116), 2 states have call successors, (116) Word has length 731 [2023-11-12 02:08:35,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:08:35,208 INFO L225 Difference]: With dead ends: 1044 [2023-11-12 02:08:35,208 INFO L226 Difference]: Without dead ends: 694 [2023-11-12 02:08:35,216 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 730 GetRequests, 728 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:08:35,221 INFO L413 NwaCegarLoop]: 585 mSDtfsCounter, 651 mSDsluCounter, 587 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 651 SdHoareTripleChecker+Valid, 1172 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:08:35,222 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [651 Valid, 1172 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:08:35,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2023-11-12 02:08:35,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 692. [2023-11-12 02:08:35,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 692 states, 457 states have (on average 1.6170678336980306) internal successors, (739), 457 states have internal predecessors, (739), 232 states have call successors, (232), 2 states have call predecessors, (232), 2 states have return successors, (232), 232 states have call predecessors, (232), 232 states have call successors, (232) [2023-11-12 02:08:35,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 692 states to 692 states and 1203 transitions. [2023-11-12 02:08:35,434 INFO L78 Accepts]: Start accepts. Automaton has 692 states and 1203 transitions. Word has length 731 [2023-11-12 02:08:35,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:08:35,439 INFO L495 AbstractCegarLoop]: Abstraction has 692 states and 1203 transitions. [2023-11-12 02:08:35,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.25) internal successors, (157), 3 states have internal predecessors, (157), 2 states have call successors, (116), 2 states have call predecessors, (116), 2 states have return successors, (116), 2 states have call predecessors, (116), 2 states have call successors, (116) [2023-11-12 02:08:35,440 INFO L276 IsEmpty]: Start isEmpty. Operand 692 states and 1203 transitions. [2023-11-12 02:08:35,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 732 [2023-11-12 02:08:35,473 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:08:35,474 INFO L195 NwaCegarLoop]: trace histogram [116, 116, 116, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:08:35,490 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb32a358-ccdd-40bc-ace1-ca45cfbd1957/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 02:08:35,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb32a358-ccdd-40bc-ace1-ca45cfbd1957/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-12 02:08:35,685 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:08:35,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:08:35,686 INFO L85 PathProgramCache]: Analyzing trace with hash 268034069, now seen corresponding path program 1 times [2023-11-12 02:08:35,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:08:35,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44341182] [2023-11-12 02:08:35,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:08:35,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:08:35,888 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:08:35,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2080039898] [2023-11-12 02:08:35,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:08:35,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:08:35,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb32a358-ccdd-40bc-ace1-ca45cfbd1957/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:08:35,896 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb32a358-ccdd-40bc-ace1-ca45cfbd1957/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:08:35,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb32a358-ccdd-40bc-ace1-ca45cfbd1957/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 02:08:36,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:08:36,488 INFO L262 TraceCheckSpWp]: Trace formula consists of 1718 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 02:08:36,510 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:08:39,241 INFO L134 CoverageAnalysis]: Checked inductivity of 26680 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26680 trivial. 0 not checked. [2023-11-12 02:08:39,241 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:08:39,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:08:39,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44341182] [2023-11-12 02:08:39,243 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:08:39,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080039898] [2023-11-12 02:08:39,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080039898] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:08:39,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:08:39,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:08:39,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191389826] [2023-11-12 02:08:39,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:08:39,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:08:39,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:08:39,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:08:39,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:08:39,252 INFO L87 Difference]: Start difference. First operand 692 states and 1203 transitions. Second operand has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 2 states have internal predecessors, (154), 1 states have call successors, (116), 1 states have call predecessors, (116), 1 states have return successors, (116), 1 states have call predecessors, (116), 1 states have call successors, (116) [2023-11-12 02:08:39,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:08:39,497 INFO L93 Difference]: Finished difference Result 2062 states and 3587 transitions. [2023-11-12 02:08:39,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:08:39,499 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 2 states have internal predecessors, (154), 1 states have call successors, (116), 1 states have call predecessors, (116), 1 states have return successors, (116), 1 states have call predecessors, (116), 1 states have call successors, (116) Word has length 731 [2023-11-12 02:08:39,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:08:39,520 INFO L225 Difference]: With dead ends: 2062 [2023-11-12 02:08:39,520 INFO L226 Difference]: Without dead ends: 1373 [2023-11-12 02:08:39,524 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 730 GetRequests, 729 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:08:39,526 INFO L413 NwaCegarLoop]: 579 mSDtfsCounter, 273 mSDsluCounter, 562 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 1141 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:08:39,527 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [273 Valid, 1141 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:08:39,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1373 states. [2023-11-12 02:08:39,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1373 to 1367. [2023-11-12 02:08:39,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1367 states, 898 states have (on average 1.6080178173719377) internal successors, (1444), 898 states have internal predecessors, (1444), 464 states have call successors, (464), 4 states have call predecessors, (464), 4 states have return successors, (464), 464 states have call predecessors, (464), 464 states have call successors, (464) [2023-11-12 02:08:39,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1367 states to 1367 states and 2372 transitions. [2023-11-12 02:08:39,928 INFO L78 Accepts]: Start accepts. Automaton has 1367 states and 2372 transitions. Word has length 731 [2023-11-12 02:08:39,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:08:39,930 INFO L495 AbstractCegarLoop]: Abstraction has 1367 states and 2372 transitions. [2023-11-12 02:08:39,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 2 states have internal predecessors, (154), 1 states have call successors, (116), 1 states have call predecessors, (116), 1 states have return successors, (116), 1 states have call predecessors, (116), 1 states have call successors, (116) [2023-11-12 02:08:39,931 INFO L276 IsEmpty]: Start isEmpty. Operand 1367 states and 2372 transitions. [2023-11-12 02:08:39,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 732 [2023-11-12 02:08:39,941 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:08:39,941 INFO L195 NwaCegarLoop]: trace histogram [116, 116, 116, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:08:39,965 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb32a358-ccdd-40bc-ace1-ca45cfbd1957/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 02:08:40,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb32a358-ccdd-40bc-ace1-ca45cfbd1957/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:08:40,151 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:08:40,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:08:40,152 INFO L85 PathProgramCache]: Analyzing trace with hash -224592105, now seen corresponding path program 1 times [2023-11-12 02:08:40,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:08:40,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858198634] [2023-11-12 02:08:40,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:08:40,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:08:40,269 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:08:40,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1432223354] [2023-11-12 02:08:40,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:08:40,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:08:40,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb32a358-ccdd-40bc-ace1-ca45cfbd1957/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:08:40,271 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb32a358-ccdd-40bc-ace1-ca45cfbd1957/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:08:40,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb32a358-ccdd-40bc-ace1-ca45cfbd1957/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 02:08:40,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:08:40,804 INFO L262 TraceCheckSpWp]: Trace formula consists of 1715 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 02:08:40,830 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:08:40,927 INFO L134 CoverageAnalysis]: Checked inductivity of 26680 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26680 trivial. 0 not checked. [2023-11-12 02:08:40,927 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:08:40,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:08:40,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858198634] [2023-11-12 02:08:40,928 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:08:40,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432223354] [2023-11-12 02:08:40,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432223354] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:08:40,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:08:40,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:08:40,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866891400] [2023-11-12 02:08:40,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:08:40,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:08:40,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:08:40,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:08:40,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:08:40,933 INFO L87 Difference]: Start difference. First operand 1367 states and 2372 transitions. Second operand has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 1 states have call successors, (116), 1 states have call predecessors, (116), 1 states have return successors, (116), 1 states have call predecessors, (116), 1 states have call successors, (116) [2023-11-12 02:08:41,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:08:41,135 INFO L93 Difference]: Finished difference Result 3159 states and 5494 transitions. [2023-11-12 02:08:41,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:08:41,137 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 1 states have call successors, (116), 1 states have call predecessors, (116), 1 states have return successors, (116), 1 states have call predecessors, (116), 1 states have call successors, (116) Word has length 731 [2023-11-12 02:08:41,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:08:41,152 INFO L225 Difference]: With dead ends: 3159 [2023-11-12 02:08:41,153 INFO L226 Difference]: Without dead ends: 1795 [2023-11-12 02:08:41,158 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 730 GetRequests, 729 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:08:41,159 INFO L413 NwaCegarLoop]: 675 mSDtfsCounter, 326 mSDsluCounter, 589 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 1264 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:08:41,160 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [326 Valid, 1264 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:08:41,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1795 states. [2023-11-12 02:08:41,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1795 to 1790. [2023-11-12 02:08:41,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1790 states, 1233 states have (on average 1.6261151662611517) internal successors, (2005), 1236 states have internal predecessors, (2005), 548 states have call successors, (548), 8 states have call predecessors, (548), 8 states have return successors, (548), 545 states have call predecessors, (548), 548 states have call successors, (548) [2023-11-12 02:08:41,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1790 states to 1790 states and 3101 transitions. [2023-11-12 02:08:41,514 INFO L78 Accepts]: Start accepts. Automaton has 1790 states and 3101 transitions. Word has length 731 [2023-11-12 02:08:41,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:08:41,516 INFO L495 AbstractCegarLoop]: Abstraction has 1790 states and 3101 transitions. [2023-11-12 02:08:41,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 1 states have call successors, (116), 1 states have call predecessors, (116), 1 states have return successors, (116), 1 states have call predecessors, (116), 1 states have call successors, (116) [2023-11-12 02:08:41,517 INFO L276 IsEmpty]: Start isEmpty. Operand 1790 states and 3101 transitions. [2023-11-12 02:08:41,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 732 [2023-11-12 02:08:41,527 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:08:41,527 INFO L195 NwaCegarLoop]: trace histogram [116, 116, 116, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:08:41,537 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb32a358-ccdd-40bc-ace1-ca45cfbd1957/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 02:08:41,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb32a358-ccdd-40bc-ace1-ca45cfbd1957/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:08:41,738 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:08:41,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:08:41,738 INFO L85 PathProgramCache]: Analyzing trace with hash -840416621, now seen corresponding path program 1 times [2023-11-12 02:08:41,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:08:41,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295137110] [2023-11-12 02:08:41,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:08:41,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:08:41,879 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:08:41,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [279738503] [2023-11-12 02:08:41,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:08:41,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:08:41,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb32a358-ccdd-40bc-ace1-ca45cfbd1957/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:08:41,881 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb32a358-ccdd-40bc-ace1-ca45cfbd1957/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:08:41,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb32a358-ccdd-40bc-ace1-ca45cfbd1957/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 02:08:42,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:08:42,402 INFO L262 TraceCheckSpWp]: Trace formula consists of 1713 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 02:08:42,418 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:08:42,506 INFO L134 CoverageAnalysis]: Checked inductivity of 26680 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26680 trivial. 0 not checked. [2023-11-12 02:08:42,506 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:08:42,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:08:42,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295137110] [2023-11-12 02:08:42,507 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:08:42,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279738503] [2023-11-12 02:08:42,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279738503] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:08:42,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:08:42,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:08:42,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042647155] [2023-11-12 02:08:42,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:08:42,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:08:42,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:08:42,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:08:42,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:08:42,511 INFO L87 Difference]: Start difference. First operand 1790 states and 3101 transitions. Second operand has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 1 states have call successors, (116), 1 states have call predecessors, (116), 1 states have return successors, (116), 1 states have call predecessors, (116), 1 states have call successors, (116) [2023-11-12 02:08:42,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:08:42,689 INFO L93 Difference]: Finished difference Result 4514 states and 7833 transitions. [2023-11-12 02:08:42,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:08:42,690 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 1 states have call successors, (116), 1 states have call predecessors, (116), 1 states have return successors, (116), 1 states have call predecessors, (116), 1 states have call successors, (116) Word has length 731 [2023-11-12 02:08:42,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:08:42,715 INFO L225 Difference]: With dead ends: 4514 [2023-11-12 02:08:42,715 INFO L226 Difference]: Without dead ends: 2771 [2023-11-12 02:08:42,725 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 730 GetRequests, 729 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:08:42,728 INFO L413 NwaCegarLoop]: 687 mSDtfsCounter, 311 mSDsluCounter, 590 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 1277 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:08:42,729 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [311 Valid, 1277 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:08:42,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2771 states. [2023-11-12 02:08:43,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2771 to 2765. [2023-11-12 02:08:43,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2765 states, 1992 states have (on average 1.6440763052208835) internal successors, (3275), 2001 states have internal predecessors, (3275), 756 states have call successors, (756), 16 states have call predecessors, (756), 16 states have return successors, (756), 747 states have call predecessors, (756), 756 states have call successors, (756) [2023-11-12 02:08:43,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2765 states to 2765 states and 4787 transitions. [2023-11-12 02:08:43,122 INFO L78 Accepts]: Start accepts. Automaton has 2765 states and 4787 transitions. Word has length 731 [2023-11-12 02:08:43,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:08:43,123 INFO L495 AbstractCegarLoop]: Abstraction has 2765 states and 4787 transitions. [2023-11-12 02:08:43,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 1 states have call successors, (116), 1 states have call predecessors, (116), 1 states have return successors, (116), 1 states have call predecessors, (116), 1 states have call successors, (116) [2023-11-12 02:08:43,124 INFO L276 IsEmpty]: Start isEmpty. Operand 2765 states and 4787 transitions. [2023-11-12 02:08:43,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 732 [2023-11-12 02:08:43,134 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:08:43,135 INFO L195 NwaCegarLoop]: trace histogram [116, 116, 116, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:08:43,150 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb32a358-ccdd-40bc-ace1-ca45cfbd1957/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 02:08:43,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb32a358-ccdd-40bc-ace1-ca45cfbd1957/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:08:43,345 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:08:43,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:08:43,346 INFO L85 PathProgramCache]: Analyzing trace with hash 1460405969, now seen corresponding path program 1 times [2023-11-12 02:08:43,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:08:43,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283647523] [2023-11-12 02:08:43,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:08:43,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:08:43,472 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:08:43,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [205068010] [2023-11-12 02:08:43,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:08:43,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:08:43,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb32a358-ccdd-40bc-ace1-ca45cfbd1957/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:08:43,474 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb32a358-ccdd-40bc-ace1-ca45cfbd1957/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:08:43,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb32a358-ccdd-40bc-ace1-ca45cfbd1957/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 02:08:44,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:08:44,032 INFO L262 TraceCheckSpWp]: Trace formula consists of 1712 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 02:08:44,054 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:08:44,115 INFO L134 CoverageAnalysis]: Checked inductivity of 26680 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26680 trivial. 0 not checked. [2023-11-12 02:08:44,115 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:08:44,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:08:44,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283647523] [2023-11-12 02:08:44,116 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:08:44,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205068010] [2023-11-12 02:08:44,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205068010] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:08:44,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:08:44,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:08:44,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650722054] [2023-11-12 02:08:44,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:08:44,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:08:44,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:08:44,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:08:44,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:08:44,121 INFO L87 Difference]: Start difference. First operand 2765 states and 4787 transitions. Second operand has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 1 states have call successors, (116), 1 states have call predecessors, (116), 1 states have return successors, (116), 1 states have call predecessors, (116), 1 states have call successors, (116) [2023-11-12 02:08:44,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:08:44,368 INFO L93 Difference]: Finished difference Result 7580 states and 13177 transitions. [2023-11-12 02:08:44,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:08:44,369 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 1 states have call successors, (116), 1 states have call predecessors, (116), 1 states have return successors, (116), 1 states have call predecessors, (116), 1 states have call successors, (116) Word has length 731 [2023-11-12 02:08:44,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:08:44,406 INFO L225 Difference]: With dead ends: 7580 [2023-11-12 02:08:44,406 INFO L226 Difference]: Without dead ends: 4862 [2023-11-12 02:08:44,417 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 730 GetRequests, 729 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:08:44,418 INFO L413 NwaCegarLoop]: 933 mSDtfsCounter, 348 mSDsluCounter, 590 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 1523 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:08:44,418 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [348 Valid, 1523 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:08:44,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4862 states. [2023-11-12 02:08:44,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4862 to 4852. [2023-11-12 02:08:44,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4852 states, 3695 states have (on average 1.6728010825439783) internal successors, (6181), 3716 states have internal predecessors, (6181), 1124 states have call successors, (1124), 32 states have call predecessors, (1124), 32 states have return successors, (1124), 1103 states have call predecessors, (1124), 1124 states have call successors, (1124) [2023-11-12 02:08:44,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4852 states to 4852 states and 8429 transitions. [2023-11-12 02:08:44,969 INFO L78 Accepts]: Start accepts. Automaton has 4852 states and 8429 transitions. Word has length 731 [2023-11-12 02:08:44,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:08:44,971 INFO L495 AbstractCegarLoop]: Abstraction has 4852 states and 8429 transitions. [2023-11-12 02:08:44,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 1 states have call successors, (116), 1 states have call predecessors, (116), 1 states have return successors, (116), 1 states have call predecessors, (116), 1 states have call successors, (116) [2023-11-12 02:08:44,971 INFO L276 IsEmpty]: Start isEmpty. Operand 4852 states and 8429 transitions. [2023-11-12 02:08:44,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 733 [2023-11-12 02:08:44,986 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:08:44,986 INFO L195 NwaCegarLoop]: trace histogram [116, 116, 116, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:08:45,000 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb32a358-ccdd-40bc-ace1-ca45cfbd1957/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-12 02:08:45,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb32a358-ccdd-40bc-ace1-ca45cfbd1957/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:08:45,195 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:08:45,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:08:45,196 INFO L85 PathProgramCache]: Analyzing trace with hash -1153103276, now seen corresponding path program 1 times [2023-11-12 02:08:45,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:08:45,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274908792] [2023-11-12 02:08:45,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:08:45,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:08:45,348 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:08:45,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [840206824] [2023-11-12 02:08:45,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:08:45,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:08:45,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb32a358-ccdd-40bc-ace1-ca45cfbd1957/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:08:45,352 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb32a358-ccdd-40bc-ace1-ca45cfbd1957/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:08:45,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb32a358-ccdd-40bc-ace1-ca45cfbd1957/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-12 02:08:45,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:08:45,906 INFO L262 TraceCheckSpWp]: Trace formula consists of 1716 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:08:45,927 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:08:46,022 INFO L134 CoverageAnalysis]: Checked inductivity of 26680 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26680 trivial. 0 not checked. [2023-11-12 02:08:46,023 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:08:46,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:08:46,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274908792] [2023-11-12 02:08:46,024 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:08:46,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840206824] [2023-11-12 02:08:46,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840206824] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:08:46,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:08:46,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 02:08:46,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527177594] [2023-11-12 02:08:46,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:08:46,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:08:46,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:08:46,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:08:46,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:08:46,028 INFO L87 Difference]: Start difference. First operand 4852 states and 8429 transitions. Second operand has 4 states, 4 states have (on average 38.75) internal successors, (155), 4 states have internal predecessors, (155), 1 states have call successors, (116), 1 states have call predecessors, (116), 1 states have return successors, (116), 1 states have call predecessors, (116), 1 states have call successors, (116) [2023-11-12 02:08:47,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:08:47,781 INFO L93 Difference]: Finished difference Result 20928 states and 36125 transitions. [2023-11-12 02:08:47,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:08:47,782 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.75) internal successors, (155), 4 states have internal predecessors, (155), 1 states have call successors, (116), 1 states have call predecessors, (116), 1 states have return successors, (116), 1 states have call predecessors, (116), 1 states have call successors, (116) Word has length 732 [2023-11-12 02:08:47,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:08:47,894 INFO L225 Difference]: With dead ends: 20928 [2023-11-12 02:08:47,894 INFO L226 Difference]: Without dead ends: 16123 [2023-11-12 02:08:47,916 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 733 GetRequests, 730 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:08:47,917 INFO L413 NwaCegarLoop]: 1123 mSDtfsCounter, 1031 mSDsluCounter, 1440 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1031 SdHoareTripleChecker+Valid, 2563 SdHoareTripleChecker+Invalid, 446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-12 02:08:47,917 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1031 Valid, 2563 Invalid, 446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 360 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-12 02:08:47,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16123 states. [2023-11-12 02:08:49,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16123 to 16101. [2023-11-12 02:08:49,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16101 states, 12248 states have (on average 1.6401045068582625) internal successors, (20088), 12337 states have internal predecessors, (20088), 3724 states have call successors, (3724), 128 states have call predecessors, (3724), 128 states have return successors, (3724), 3635 states have call predecessors, (3724), 3724 states have call successors, (3724) [2023-11-12 02:08:49,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16101 states to 16101 states and 27536 transitions. [2023-11-12 02:08:49,561 INFO L78 Accepts]: Start accepts. Automaton has 16101 states and 27536 transitions. Word has length 732 [2023-11-12 02:08:49,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:08:49,562 INFO L495 AbstractCegarLoop]: Abstraction has 16101 states and 27536 transitions. [2023-11-12 02:08:49,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.75) internal successors, (155), 4 states have internal predecessors, (155), 1 states have call successors, (116), 1 states have call predecessors, (116), 1 states have return successors, (116), 1 states have call predecessors, (116), 1 states have call successors, (116) [2023-11-12 02:08:49,564 INFO L276 IsEmpty]: Start isEmpty. Operand 16101 states and 27536 transitions. [2023-11-12 02:08:49,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 733 [2023-11-12 02:08:49,595 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:08:49,596 INFO L195 NwaCegarLoop]: trace histogram [116, 116, 116, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:08:49,605 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb32a358-ccdd-40bc-ace1-ca45cfbd1957/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-12 02:08:49,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb32a358-ccdd-40bc-ace1-ca45cfbd1957/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-12 02:08:49,805 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:08:49,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:08:49,806 INFO L85 PathProgramCache]: Analyzing trace with hash 535840466, now seen corresponding path program 1 times [2023-11-12 02:08:49,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:08:49,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717566804] [2023-11-12 02:08:49,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:08:49,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:08:49,999 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:08:49,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1861970411] [2023-11-12 02:08:50,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:08:50,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:08:50,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb32a358-ccdd-40bc-ace1-ca45cfbd1957/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:08:50,001 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb32a358-ccdd-40bc-ace1-ca45cfbd1957/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:08:50,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb32a358-ccdd-40bc-ace1-ca45cfbd1957/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-12 02:08:50,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:08:50,575 INFO L262 TraceCheckSpWp]: Trace formula consists of 1717 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:08:50,591 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:08:51,609 INFO L134 CoverageAnalysis]: Checked inductivity of 26680 backedges. 11563 proven. 237 refuted. 0 times theorem prover too weak. 14880 trivial. 0 not checked. [2023-11-12 02:08:51,610 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:08:52,278 INFO L134 CoverageAnalysis]: Checked inductivity of 26680 backedges. 108 proven. 237 refuted. 0 times theorem prover too weak. 26335 trivial. 0 not checked. [2023-11-12 02:08:52,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:08:52,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717566804] [2023-11-12 02:08:52,279 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:08:52,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861970411] [2023-11-12 02:08:52,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861970411] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:08:52,279 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:08:52,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-12 02:08:52,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267686871] [2023-11-12 02:08:52,280 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:08:52,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:08:52,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:08:52,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:08:52,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:08:52,284 INFO L87 Difference]: Start difference. First operand 16101 states and 27536 transitions. Second operand has 7 states, 7 states have (on average 23.428571428571427) internal successors, (164), 7 states have internal predecessors, (164), 2 states have call successors, (195), 2 states have call predecessors, (195), 4 states have return successors, (196), 2 states have call predecessors, (196), 2 states have call successors, (196) [2023-11-12 02:08:54,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:08:54,444 INFO L93 Difference]: Finished difference Result 32475 states and 55301 transitions. [2023-11-12 02:08:54,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 02:08:54,445 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 23.428571428571427) internal successors, (164), 7 states have internal predecessors, (164), 2 states have call successors, (195), 2 states have call predecessors, (195), 4 states have return successors, (196), 2 states have call predecessors, (196), 2 states have call successors, (196) Word has length 732 [2023-11-12 02:08:54,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:08:54,508 INFO L225 Difference]: With dead ends: 32475 [2023-11-12 02:08:54,509 INFO L226 Difference]: Without dead ends: 16421 [2023-11-12 02:08:54,557 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1466 GetRequests, 1456 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-12 02:08:54,558 INFO L413 NwaCegarLoop]: 482 mSDtfsCounter, 333 mSDsluCounter, 730 mSDsCounter, 0 mSdLazyCounter, 579 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 369 SdHoareTripleChecker+Valid, 1212 SdHoareTripleChecker+Invalid, 602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-12 02:08:54,558 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [369 Valid, 1212 Invalid, 602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 579 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-12 02:08:54,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16421 states. [2023-11-12 02:08:56,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16421 to 16165. [2023-11-12 02:08:56,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16165 states, 12296 states have (on average 1.6332140533506831) internal successors, (20082), 12385 states have internal predecessors, (20082), 3724 states have call successors, (3724), 144 states have call predecessors, (3724), 144 states have return successors, (3724), 3635 states have call predecessors, (3724), 3724 states have call successors, (3724) [2023-11-12 02:08:56,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16165 states to 16165 states and 27530 transitions. [2023-11-12 02:08:56,489 INFO L78 Accepts]: Start accepts. Automaton has 16165 states and 27530 transitions. Word has length 732 [2023-11-12 02:08:56,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:08:56,491 INFO L495 AbstractCegarLoop]: Abstraction has 16165 states and 27530 transitions. [2023-11-12 02:08:56,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.428571428571427) internal successors, (164), 7 states have internal predecessors, (164), 2 states have call successors, (195), 2 states have call predecessors, (195), 4 states have return successors, (196), 2 states have call predecessors, (196), 2 states have call successors, (196) [2023-11-12 02:08:56,491 INFO L276 IsEmpty]: Start isEmpty. Operand 16165 states and 27530 transitions. [2023-11-12 02:08:56,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 733 [2023-11-12 02:08:56,518 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:08:56,518 INFO L195 NwaCegarLoop]: trace histogram [116, 116, 116, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:08:56,531 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb32a358-ccdd-40bc-ace1-ca45cfbd1957/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-12 02:08:56,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb32a358-ccdd-40bc-ace1-ca45cfbd1957/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-12 02:08:56,729 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:08:56,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:08:56,729 INFO L85 PathProgramCache]: Analyzing trace with hash -1002499564, now seen corresponding path program 1 times [2023-11-12 02:08:56,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:08:56,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294116621] [2023-11-12 02:08:56,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:08:56,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:08:56,831 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:08:56,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2026688745] [2023-11-12 02:08:56,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:08:56,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:08:56,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb32a358-ccdd-40bc-ace1-ca45cfbd1957/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:08:56,837 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb32a358-ccdd-40bc-ace1-ca45cfbd1957/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:08:56,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb32a358-ccdd-40bc-ace1-ca45cfbd1957/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-12 02:08:57,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:08:57,425 INFO L262 TraceCheckSpWp]: Trace formula consists of 1716 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-12 02:08:57,448 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:08:58,801 INFO L134 CoverageAnalysis]: Checked inductivity of 26680 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26680 trivial. 0 not checked. [2023-11-12 02:08:58,801 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:08:58,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:08:58,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294116621] [2023-11-12 02:08:58,802 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:08:58,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026688745] [2023-11-12 02:08:58,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026688745] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:08:58,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:08:58,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 02:08:58,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408466144] [2023-11-12 02:08:58,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:08:58,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:08:58,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:08:58,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:08:58,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:08:58,806 INFO L87 Difference]: Start difference. First operand 16165 states and 27530 transitions. Second operand has 5 states, 5 states have (on average 31.0) internal successors, (155), 4 states have internal predecessors, (155), 1 states have call successors, (116), 1 states have call predecessors, (116), 1 states have return successors, (116), 1 states have call predecessors, (116), 1 states have call successors, (116) [2023-11-12 02:09:01,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:09:01,132 INFO L93 Difference]: Finished difference Result 49428 states and 85371 transitions. [2023-11-12 02:09:01,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 02:09:01,133 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.0) internal successors, (155), 4 states have internal predecessors, (155), 1 states have call successors, (116), 1 states have call predecessors, (116), 1 states have return successors, (116), 1 states have call predecessors, (116), 1 states have call successors, (116) Word has length 732 [2023-11-12 02:09:01,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:09:01,232 INFO L225 Difference]: With dead ends: 49428 [2023-11-12 02:09:01,232 INFO L226 Difference]: Without dead ends: 33310 [2023-11-12 02:09:01,271 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 733 GetRequests, 728 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:09:01,272 INFO L413 NwaCegarLoop]: 594 mSDtfsCounter, 1283 mSDsluCounter, 1524 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 307 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1283 SdHoareTripleChecker+Valid, 2118 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 307 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-12 02:09:01,272 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1283 Valid, 2118 Invalid, 502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [307 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-12 02:09:01,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33310 states. [2023-11-12 02:09:03,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33310 to 23209. [2023-11-12 02:09:03,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23209 states, 19247 states have (on average 1.6926793786044578) internal successors, (32579), 19335 states have internal predecessors, (32579), 3812 states have call successors, (3812), 149 states have call predecessors, (3812), 149 states have return successors, (3812), 3724 states have call predecessors, (3812), 3812 states have call successors, (3812) [2023-11-12 02:09:03,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23209 states to 23209 states and 40203 transitions. [2023-11-12 02:09:03,630 INFO L78 Accepts]: Start accepts. Automaton has 23209 states and 40203 transitions. Word has length 732 [2023-11-12 02:09:03,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:09:03,632 INFO L495 AbstractCegarLoop]: Abstraction has 23209 states and 40203 transitions. [2023-11-12 02:09:03,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.0) internal successors, (155), 4 states have internal predecessors, (155), 1 states have call successors, (116), 1 states have call predecessors, (116), 1 states have return successors, (116), 1 states have call predecessors, (116), 1 states have call successors, (116) [2023-11-12 02:09:03,632 INFO L276 IsEmpty]: Start isEmpty. Operand 23209 states and 40203 transitions. [2023-11-12 02:09:03,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 734 [2023-11-12 02:09:03,655 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:09:03,656 INFO L195 NwaCegarLoop]: trace histogram [116, 116, 116, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:09:03,671 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb32a358-ccdd-40bc-ace1-ca45cfbd1957/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-12 02:09:03,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb32a358-ccdd-40bc-ace1-ca45cfbd1957/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:09:03,866 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:09:03,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:09:03,867 INFO L85 PathProgramCache]: Analyzing trace with hash 845066727, now seen corresponding path program 1 times [2023-11-12 02:09:03,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:09:03,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394227833] [2023-11-12 02:09:03,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:09:03,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:09:04,161 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:09:04,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [324653782] [2023-11-12 02:09:04,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:09:04,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:09:04,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb32a358-ccdd-40bc-ace1-ca45cfbd1957/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:09:04,164 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb32a358-ccdd-40bc-ace1-ca45cfbd1957/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:09:04,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb32a358-ccdd-40bc-ace1-ca45cfbd1957/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-12 02:09:04,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:09:04,792 INFO L262 TraceCheckSpWp]: Trace formula consists of 1716 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:09:04,826 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:09:05,809 INFO L134 CoverageAnalysis]: Checked inductivity of 26680 backedges. 11385 proven. 240 refuted. 0 times theorem prover too weak. 15055 trivial. 0 not checked. [2023-11-12 02:09:05,810 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:09:06,556 INFO L134 CoverageAnalysis]: Checked inductivity of 26680 backedges. 105 proven. 240 refuted. 0 times theorem prover too weak. 26335 trivial. 0 not checked. [2023-11-12 02:09:06,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:09:06,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394227833] [2023-11-12 02:09:06,557 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:09:06,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324653782] [2023-11-12 02:09:06,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324653782] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:09:06,558 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:09:06,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-12 02:09:06,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376865288] [2023-11-12 02:09:06,562 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:09:06,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:09:06,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:09:06,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:09:06,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:09:06,567 INFO L87 Difference]: Start difference. First operand 23209 states and 40203 transitions. Second operand has 7 states, 7 states have (on average 23.571428571428573) internal successors, (165), 7 states have internal predecessors, (165), 2 states have call successors, (196), 2 states have call predecessors, (196), 4 states have return successors, (197), 2 states have call predecessors, (197), 2 states have call successors, (197) [2023-11-12 02:09:08,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:09:08,467 INFO L93 Difference]: Finished difference Result 40693 states and 69652 transitions. [2023-11-12 02:09:08,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 02:09:08,468 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 23.571428571428573) internal successors, (165), 7 states have internal predecessors, (165), 2 states have call successors, (196), 2 states have call predecessors, (196), 4 states have return successors, (197), 2 states have call predecessors, (197), 2 states have call successors, (197) Word has length 733 [2023-11-12 02:09:08,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:09:08,540 INFO L225 Difference]: With dead ends: 40693 [2023-11-12 02:09:08,541 INFO L226 Difference]: Without dead ends: 21271 [2023-11-12 02:09:08,569 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1468 GetRequests, 1458 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-12 02:09:08,571 INFO L413 NwaCegarLoop]: 479 mSDtfsCounter, 305 mSDsluCounter, 724 mSDsCounter, 0 mSdLazyCounter, 587 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 1203 SdHoareTripleChecker+Invalid, 611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-12 02:09:08,572 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [339 Valid, 1203 Invalid, 611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 587 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-12 02:09:08,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21271 states.