./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_normal_file-81.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b50886-6df6-4505-ae3a-4d238f822348/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b50886-6df6-4505-ae3a-4d238f822348/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b50886-6df6-4505-ae3a-4d238f822348/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b50886-6df6-4505-ae3a-4d238f822348/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_normal_file-81.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b50886-6df6-4505-ae3a-4d238f822348/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b50886-6df6-4505-ae3a-4d238f822348/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 139d16f6f2adc0a53ed334bc0ef4cd475497ad47ce08b4367552becb4de333c7 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:12:39,957 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:12:40,074 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b50886-6df6-4505-ae3a-4d238f822348/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 22:12:40,086 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:12:40,088 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:12:40,124 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:12:40,126 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:12:40,127 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:12:40,128 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:12:40,133 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:12:40,134 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:12:40,135 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:12:40,135 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:12:40,137 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:12:40,138 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 22:12:40,138 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:12:40,139 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:12:40,139 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:12:40,140 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:12:40,140 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 22:12:40,141 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:12:40,142 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 22:12:40,142 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:12:40,143 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 22:12:40,143 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:12:40,144 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:12:40,145 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:12:40,145 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:12:40,145 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:12:40,146 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:12:40,147 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:12:40,148 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 22:12:40,148 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:12:40,148 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:12:40,149 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:12:40,149 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 22:12:40,149 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:12:40,150 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:12:40,150 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:12:40,150 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_26b50886-6df6-4505-ae3a-4d238f822348/bin/uautomizer-verify-WvqO1wxjHP/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b50886-6df6-4505-ae3a-4d238f822348/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 139d16f6f2adc0a53ed334bc0ef4cd475497ad47ce08b4367552becb4de333c7 [2023-11-06 22:12:40,443 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:12:40,473 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:12:40,476 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:12:40,477 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:12:40,478 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:12:40,479 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b50886-6df6-4505-ae3a-4d238f822348/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_normal_file-81.i [2023-11-06 22:12:43,571 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:12:43,818 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:12:43,819 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b50886-6df6-4505-ae3a-4d238f822348/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_normal_file-81.i [2023-11-06 22:12:43,835 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b50886-6df6-4505-ae3a-4d238f822348/bin/uautomizer-verify-WvqO1wxjHP/data/e6e4463e3/d6646f1a12a147f0a7e404c166e87a74/FLAG8c009104b [2023-11-06 22:12:43,849 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b50886-6df6-4505-ae3a-4d238f822348/bin/uautomizer-verify-WvqO1wxjHP/data/e6e4463e3/d6646f1a12a147f0a7e404c166e87a74 [2023-11-06 22:12:43,851 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:12:43,853 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:12:43,854 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:12:43,854 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:12:43,859 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:12:43,859 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:12:43" (1/1) ... [2023-11-06 22:12:43,860 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ec6f624 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:12:43, skipping insertion in model container [2023-11-06 22:12:43,860 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:12:43" (1/1) ... [2023-11-06 22:12:43,900 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:12:44,062 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_26b50886-6df6-4505-ae3a-4d238f822348/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_normal_file-81.i[913,926] [2023-11-06 22:12:44,165 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:12:44,181 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:12:44,193 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_26b50886-6df6-4505-ae3a-4d238f822348/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_normal_file-81.i[913,926] [2023-11-06 22:12:44,226 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:12:44,246 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:12:44,248 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:12:44 WrapperNode [2023-11-06 22:12:44,248 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:12:44,250 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:12:44,250 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:12:44,254 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:12:44,262 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:12:44" (1/1) ... [2023-11-06 22:12:44,275 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:12:44" (1/1) ... [2023-11-06 22:12:44,361 INFO L138 Inliner]: procedures = 26, calls = 39, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 181 [2023-11-06 22:12:44,367 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:12:44,368 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:12:44,368 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:12:44,368 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:12:44,378 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:12:44" (1/1) ... [2023-11-06 22:12:44,378 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:12:44" (1/1) ... [2023-11-06 22:12:44,394 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:12:44" (1/1) ... [2023-11-06 22:12:44,394 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:12:44" (1/1) ... [2023-11-06 22:12:44,423 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:12:44" (1/1) ... [2023-11-06 22:12:44,427 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:12:44" (1/1) ... [2023-11-06 22:12:44,430 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:12:44" (1/1) ... [2023-11-06 22:12:44,433 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:12:44" (1/1) ... [2023-11-06 22:12:44,438 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:12:44,451 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:12:44,451 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:12:44,451 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:12:44,452 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:12:44" (1/1) ... [2023-11-06 22:12:44,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:12:44,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b50886-6df6-4505-ae3a-4d238f822348/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:12:44,497 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b50886-6df6-4505-ae3a-4d238f822348/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:12:44,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b50886-6df6-4505-ae3a-4d238f822348/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:12:44,543 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:12:44,544 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-06 22:12:44,544 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-06 22:12:44,544 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:12:44,544 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:12:44,544 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:12:44,679 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:12:44,681 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:12:45,114 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:12:45,121 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:12:45,126 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-06 22:12:45,128 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:12:45 BoogieIcfgContainer [2023-11-06 22:12:45,129 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:12:45,132 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:12:45,135 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:12:45,138 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:12:45,138 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:12:43" (1/3) ... [2023-11-06 22:12:45,139 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56275437 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:12:45, skipping insertion in model container [2023-11-06 22:12:45,139 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:12:44" (2/3) ... [2023-11-06 22:12:45,141 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56275437 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:12:45, skipping insertion in model container [2023-11-06 22:12:45,142 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:12:45" (3/3) ... [2023-11-06 22:12:45,143 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_fillercode_fillercodestructure_normal_file-81.i [2023-11-06 22:12:45,163 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:12:45,164 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 22:12:45,237 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:12:45,245 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@70e52751, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:12:45,246 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-06 22:12:45,250 INFO L276 IsEmpty]: Start isEmpty. Operand has 75 states, 46 states have (on average 1.391304347826087) internal successors, (64), 47 states have internal predecessors, (64), 26 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2023-11-06 22:12:45,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2023-11-06 22:12:45,271 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:12:45,273 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:12:45,274 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:12:45,281 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:12:45,281 INFO L85 PathProgramCache]: Analyzing trace with hash -319097942, now seen corresponding path program 1 times [2023-11-06 22:12:45,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:12:45,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779519013] [2023-11-06 22:12:45,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:12:45,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:12:45,492 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:12:45,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1816484271] [2023-11-06 22:12:45,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:12:45,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:12:45,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b50886-6df6-4505-ae3a-4d238f822348/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:12:45,497 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b50886-6df6-4505-ae3a-4d238f822348/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:12:45,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b50886-6df6-4505-ae3a-4d238f822348/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:12:45,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:12:45,761 INFO L262 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-06 22:12:45,775 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:12:46,568 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 610 proven. 117 refuted. 0 times theorem prover too weak. 573 trivial. 0 not checked. [2023-11-06 22:12:46,568 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:12:47,106 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 27 proven. 120 refuted. 0 times theorem prover too weak. 1153 trivial. 0 not checked. [2023-11-06 22:12:47,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:12:47,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779519013] [2023-11-06 22:12:47,107 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:12:47,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816484271] [2023-11-06 22:12:47,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816484271] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:12:47,108 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:12:47,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2023-11-06 22:12:47,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465262121] [2023-11-06 22:12:47,111 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:12:47,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-06 22:12:47,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:12:47,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-06 22:12:47,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2023-11-06 22:12:47,149 INFO L87 Difference]: Start difference. First operand has 75 states, 46 states have (on average 1.391304347826087) internal successors, (64), 47 states have internal predecessors, (64), 26 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) Second operand has 16 states, 16 states have (on average 4.6875) internal successors, (75), 16 states have internal predecessors, (75), 5 states have call successors, (51), 3 states have call predecessors, (51), 7 states have return successors, (52), 4 states have call predecessors, (52), 5 states have call successors, (52) [2023-11-06 22:12:48,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:12:48,249 INFO L93 Difference]: Finished difference Result 240 states and 413 transitions. [2023-11-06 22:12:48,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-06 22:12:48,252 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.6875) internal successors, (75), 16 states have internal predecessors, (75), 5 states have call successors, (51), 3 states have call predecessors, (51), 7 states have return successors, (52), 4 states have call predecessors, (52), 5 states have call successors, (52) Word has length 163 [2023-11-06 22:12:48,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:12:48,263 INFO L225 Difference]: With dead ends: 240 [2023-11-06 22:12:48,264 INFO L226 Difference]: Without dead ends: 168 [2023-11-06 22:12:48,269 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 313 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=340, Invalid=782, Unknown=0, NotChecked=0, Total=1122 [2023-11-06 22:12:48,272 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 348 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 559 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-06 22:12:48,273 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [351 Valid, 315 Invalid, 671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 559 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-06 22:12:48,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2023-11-06 22:12:48,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 120. [2023-11-06 22:12:48,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 78 states have (on average 1.2564102564102564) internal successors, (98), 79 states have internal predecessors, (98), 36 states have call successors, (36), 5 states have call predecessors, (36), 5 states have return successors, (36), 35 states have call predecessors, (36), 36 states have call successors, (36) [2023-11-06 22:12:48,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 170 transitions. [2023-11-06 22:12:48,343 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 170 transitions. Word has length 163 [2023-11-06 22:12:48,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:12:48,345 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 170 transitions. [2023-11-06 22:12:48,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.6875) internal successors, (75), 16 states have internal predecessors, (75), 5 states have call successors, (51), 3 states have call predecessors, (51), 7 states have return successors, (52), 4 states have call predecessors, (52), 5 states have call successors, (52) [2023-11-06 22:12:48,345 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 170 transitions. [2023-11-06 22:12:48,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2023-11-06 22:12:48,350 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:12:48,350 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:12:48,365 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b50886-6df6-4505-ae3a-4d238f822348/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 22:12:48,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b50886-6df6-4505-ae3a-4d238f822348/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-06 22:12:48,557 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:12:48,558 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:12:48,558 INFO L85 PathProgramCache]: Analyzing trace with hash 1110446480, now seen corresponding path program 1 times [2023-11-06 22:12:48,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:12:48,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733779357] [2023-11-06 22:12:48,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:12:48,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:12:48,648 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:12:48,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [114198367] [2023-11-06 22:12:48,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:12:48,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:12:48,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b50886-6df6-4505-ae3a-4d238f822348/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:12:48,660 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b50886-6df6-4505-ae3a-4d238f822348/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:12:48,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b50886-6df6-4505-ae3a-4d238f822348/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 22:12:48,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:12:48,808 INFO L262 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 22:12:48,816 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:12:49,080 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 585 proven. 51 refuted. 0 times theorem prover too weak. 664 trivial. 0 not checked. [2023-11-06 22:12:49,080 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:12:49,347 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 24 proven. 51 refuted. 0 times theorem prover too weak. 1225 trivial. 0 not checked. [2023-11-06 22:12:49,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:12:49,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733779357] [2023-11-06 22:12:49,348 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:12:49,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114198367] [2023-11-06 22:12:49,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114198367] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:12:49,349 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:12:49,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2023-11-06 22:12:49,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967979040] [2023-11-06 22:12:49,349 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:12:49,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-06 22:12:49,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:12:49,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-06 22:12:49,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2023-11-06 22:12:49,353 INFO L87 Difference]: Start difference. First operand 120 states and 170 transitions. Second operand has 13 states, 13 states have (on average 5.0) internal successors, (65), 13 states have internal predecessors, (65), 3 states have call successors, (43), 2 states have call predecessors, (43), 4 states have return successors, (44), 3 states have call predecessors, (44), 3 states have call successors, (44) [2023-11-06 22:12:50,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:12:50,108 INFO L93 Difference]: Finished difference Result 326 states and 455 transitions. [2023-11-06 22:12:50,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-06 22:12:50,109 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 13 states have internal predecessors, (65), 3 states have call successors, (43), 2 states have call predecessors, (43), 4 states have return successors, (44), 3 states have call predecessors, (44), 3 states have call successors, (44) Word has length 164 [2023-11-06 22:12:50,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:12:50,120 INFO L225 Difference]: With dead ends: 326 [2023-11-06 22:12:50,120 INFO L226 Difference]: Without dead ends: 209 [2023-11-06 22:12:50,124 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 316 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=154, Invalid=398, Unknown=0, NotChecked=0, Total=552 [2023-11-06 22:12:50,127 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 200 mSDsluCounter, 443 mSDsCounter, 0 mSdLazyCounter, 563 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 571 SdHoareTripleChecker+Invalid, 669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-06 22:12:50,128 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 571 Invalid, 669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 563 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-06 22:12:50,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2023-11-06 22:12:50,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 162. [2023-11-06 22:12:50,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 103 states have (on average 1.174757281553398) internal successors, (121), 105 states have internal predecessors, (121), 47 states have call successors, (47), 11 states have call predecessors, (47), 11 states have return successors, (47), 45 states have call predecessors, (47), 47 states have call successors, (47) [2023-11-06 22:12:50,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 215 transitions. [2023-11-06 22:12:50,196 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 215 transitions. Word has length 164 [2023-11-06 22:12:50,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:12:50,199 INFO L495 AbstractCegarLoop]: Abstraction has 162 states and 215 transitions. [2023-11-06 22:12:50,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 13 states have internal predecessors, (65), 3 states have call successors, (43), 2 states have call predecessors, (43), 4 states have return successors, (44), 3 states have call predecessors, (44), 3 states have call successors, (44) [2023-11-06 22:12:50,199 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 215 transitions. [2023-11-06 22:12:50,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2023-11-06 22:12:50,210 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:12:50,210 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:12:50,217 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b50886-6df6-4505-ae3a-4d238f822348/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 22:12:50,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b50886-6df6-4505-ae3a-4d238f822348/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:12:50,417 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:12:50,417 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:12:50,417 INFO L85 PathProgramCache]: Analyzing trace with hash 1286110825, now seen corresponding path program 1 times [2023-11-06 22:12:50,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:12:50,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594664584] [2023-11-06 22:12:50,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:12:50,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:12:50,463 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:12:50,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1203659429] [2023-11-06 22:12:50,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:12:50,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:12:50,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b50886-6df6-4505-ae3a-4d238f822348/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:12:50,465 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b50886-6df6-4505-ae3a-4d238f822348/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:12:50,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b50886-6df6-4505-ae3a-4d238f822348/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 22:12:50,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:12:50,696 INFO L262 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-06 22:12:50,702 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:12:51,306 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 25 proven. 75 refuted. 0 times theorem prover too weak. 1200 trivial. 0 not checked. [2023-11-06 22:12:51,307 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:12:51,848 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 1225 trivial. 0 not checked. [2023-11-06 22:12:51,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:12:51,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594664584] [2023-11-06 22:12:51,849 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:12:51,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203659429] [2023-11-06 22:12:51,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203659429] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:12:51,850 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:12:51,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 16 [2023-11-06 22:12:51,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445343974] [2023-11-06 22:12:51,852 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:12:51,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-06 22:12:51,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:12:51,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-06 22:12:51,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2023-11-06 22:12:51,855 INFO L87 Difference]: Start difference. First operand 162 states and 215 transitions. Second operand has 16 states, 16 states have (on average 4.1875) internal successors, (67), 16 states have internal predecessors, (67), 4 states have call successors, (52), 3 states have call predecessors, (52), 4 states have return successors, (52), 2 states have call predecessors, (52), 4 states have call successors, (52) [2023-11-06 22:12:53,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:12:53,856 INFO L93 Difference]: Finished difference Result 435 states and 588 transitions. [2023-11-06 22:12:53,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-06 22:12:53,857 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.1875) internal successors, (67), 16 states have internal predecessors, (67), 4 states have call successors, (52), 3 states have call predecessors, (52), 4 states have return successors, (52), 2 states have call predecessors, (52), 4 states have call successors, (52) Word has length 165 [2023-11-06 22:12:53,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:12:53,860 INFO L225 Difference]: With dead ends: 435 [2023-11-06 22:12:53,861 INFO L226 Difference]: Without dead ends: 310 [2023-11-06 22:12:53,862 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 320 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=432, Invalid=1128, Unknown=0, NotChecked=0, Total=1560 [2023-11-06 22:12:53,863 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 601 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 762 mSolverCounterSat, 528 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 601 SdHoareTripleChecker+Valid, 468 SdHoareTripleChecker+Invalid, 1290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 528 IncrementalHoareTripleChecker+Valid, 762 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:12:53,863 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [601 Valid, 468 Invalid, 1290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [528 Valid, 762 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-06 22:12:53,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2023-11-06 22:12:53,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 244. [2023-11-06 22:12:53,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 154 states have (on average 1.155844155844156) internal successors, (178), 156 states have internal predecessors, (178), 73 states have call successors, (73), 16 states have call predecessors, (73), 16 states have return successors, (73), 71 states have call predecessors, (73), 73 states have call successors, (73) [2023-11-06 22:12:53,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 324 transitions. [2023-11-06 22:12:53,953 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 324 transitions. Word has length 165 [2023-11-06 22:12:53,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:12:53,957 INFO L495 AbstractCegarLoop]: Abstraction has 244 states and 324 transitions. [2023-11-06 22:12:53,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.1875) internal successors, (67), 16 states have internal predecessors, (67), 4 states have call successors, (52), 3 states have call predecessors, (52), 4 states have return successors, (52), 2 states have call predecessors, (52), 4 states have call successors, (52) [2023-11-06 22:12:53,958 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 324 transitions. [2023-11-06 22:12:53,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2023-11-06 22:12:53,963 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:12:53,964 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:12:53,970 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b50886-6df6-4505-ae3a-4d238f822348/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 22:12:54,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b50886-6df6-4505-ae3a-4d238f822348/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:12:54,174 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:12:54,175 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:12:54,175 INFO L85 PathProgramCache]: Analyzing trace with hash 265042471, now seen corresponding path program 1 times [2023-11-06 22:12:54,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:12:54,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887139490] [2023-11-06 22:12:54,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:12:54,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:12:54,212 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:12:54,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1288479422] [2023-11-06 22:12:54,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:12:54,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:12:54,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b50886-6df6-4505-ae3a-4d238f822348/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:12:54,214 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b50886-6df6-4505-ae3a-4d238f822348/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:12:54,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b50886-6df6-4505-ae3a-4d238f822348/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 22:12:54,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:12:54,523 INFO L262 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-06 22:12:54,530 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:13:04,106 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 52 proven. 144 refuted. 0 times theorem prover too weak. 1104 trivial. 0 not checked. [2023-11-06 22:13:04,107 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:13:14,241 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1300 trivial. 0 not checked. [2023-11-06 22:13:14,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:13:14,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887139490] [2023-11-06 22:13:14,241 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:13:14,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288479422] [2023-11-06 22:13:14,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288479422] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 22:13:14,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:13:14,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [16] total 24 [2023-11-06 22:13:14,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372265442] [2023-11-06 22:13:14,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:13:14,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 22:13:14,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:13:14,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 22:13:14,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2023-11-06 22:13:14,245 INFO L87 Difference]: Start difference. First operand 244 states and 324 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) [2023-11-06 22:13:22,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:13:22,343 INFO L93 Difference]: Finished difference Result 524 states and 679 transitions. [2023-11-06 22:13:22,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-06 22:13:22,344 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) Word has length 165 [2023-11-06 22:13:22,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:13:22,348 INFO L225 Difference]: With dead ends: 524 [2023-11-06 22:13:22,348 INFO L226 Difference]: Without dead ends: 361 [2023-11-06 22:13:22,350 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 306 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=249, Invalid=941, Unknown=0, NotChecked=0, Total=1190 [2023-11-06 22:13:22,351 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 303 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 464 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-11-06 22:13:22,352 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [303 Valid, 464 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-11-06 22:13:22,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2023-11-06 22:13:22,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 262. [2023-11-06 22:13:22,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 172 states have (on average 1.1744186046511629) internal successors, (202), 174 states have internal predecessors, (202), 73 states have call successors, (73), 16 states have call predecessors, (73), 16 states have return successors, (73), 71 states have call predecessors, (73), 73 states have call successors, (73) [2023-11-06 22:13:22,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 348 transitions. [2023-11-06 22:13:22,423 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 348 transitions. Word has length 165 [2023-11-06 22:13:22,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:13:22,424 INFO L495 AbstractCegarLoop]: Abstraction has 262 states and 348 transitions. [2023-11-06 22:13:22,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) [2023-11-06 22:13:22,424 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 348 transitions. [2023-11-06 22:13:22,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2023-11-06 22:13:22,426 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:13:22,427 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:13:22,440 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b50886-6df6-4505-ae3a-4d238f822348/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 22:13:22,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b50886-6df6-4505-ae3a-4d238f822348/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:13:22,634 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:13:22,634 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:13:22,635 INFO L85 PathProgramCache]: Analyzing trace with hash 523207909, now seen corresponding path program 1 times [2023-11-06 22:13:22,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:13:22,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583107798] [2023-11-06 22:13:22,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:13:22,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:13:22,667 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:13:22,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [103805027] [2023-11-06 22:13:22,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:13:22,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:13:22,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b50886-6df6-4505-ae3a-4d238f822348/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:13:22,669 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b50886-6df6-4505-ae3a-4d238f822348/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:13:22,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b50886-6df6-4505-ae3a-4d238f822348/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 22:13:22,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:13:22,822 INFO L262 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 22:13:22,826 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:13:22,848 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1300 trivial. 0 not checked. [2023-11-06 22:13:22,851 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:13:22,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:13:22,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583107798] [2023-11-06 22:13:22,852 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:13:22,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103805027] [2023-11-06 22:13:22,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103805027] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:13:22,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:13:22,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:13:22,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473927819] [2023-11-06 22:13:22,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:13:22,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:13:22,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:13:22,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:13:22,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:13:22,864 INFO L87 Difference]: Start difference. First operand 262 states and 348 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) [2023-11-06 22:13:23,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:13:23,004 INFO L93 Difference]: Finished difference Result 537 states and 694 transitions. [2023-11-06 22:13:23,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:13:23,005 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) Word has length 165 [2023-11-06 22:13:23,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:13:23,013 INFO L225 Difference]: With dead ends: 537 [2023-11-06 22:13:23,014 INFO L226 Difference]: Without dead ends: 360 [2023-11-06 22:13:23,015 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:13:23,018 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 30 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:13:23,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 207 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:13:23,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2023-11-06 22:13:23,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 355. [2023-11-06 22:13:23,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 246 states have (on average 1.1544715447154472) internal successors, (284), 251 states have internal predecessors, (284), 85 states have call successors, (85), 23 states have call predecessors, (85), 23 states have return successors, (85), 80 states have call predecessors, (85), 85 states have call successors, (85) [2023-11-06 22:13:23,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 454 transitions. [2023-11-06 22:13:23,119 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 454 transitions. Word has length 165 [2023-11-06 22:13:23,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:13:23,120 INFO L495 AbstractCegarLoop]: Abstraction has 355 states and 454 transitions. [2023-11-06 22:13:23,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) [2023-11-06 22:13:23,120 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 454 transitions. [2023-11-06 22:13:23,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2023-11-06 22:13:23,123 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:13:23,123 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:13:23,135 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b50886-6df6-4505-ae3a-4d238f822348/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 22:13:23,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b50886-6df6-4505-ae3a-4d238f822348/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:13:23,330 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:13:23,331 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:13:23,331 INFO L85 PathProgramCache]: Analyzing trace with hash -1251799453, now seen corresponding path program 1 times [2023-11-06 22:13:23,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:13:23,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861002057] [2023-11-06 22:13:23,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:13:23,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:13:23,359 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:13:23,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1097991823] [2023-11-06 22:13:23,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:13:23,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:13:23,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b50886-6df6-4505-ae3a-4d238f822348/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:13:23,361 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b50886-6df6-4505-ae3a-4d238f822348/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:13:23,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b50886-6df6-4505-ae3a-4d238f822348/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 22:13:23,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:13:23,506 INFO L262 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 22:13:23,510 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:13:23,535 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1300 trivial. 0 not checked. [2023-11-06 22:13:23,535 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:13:23,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:13:23,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861002057] [2023-11-06 22:13:23,536 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:13:23,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097991823] [2023-11-06 22:13:23,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097991823] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:13:23,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:13:23,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:13:23,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451543870] [2023-11-06 22:13:23,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:13:23,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:13:23,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:13:23,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:13:23,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:13:23,539 INFO L87 Difference]: Start difference. First operand 355 states and 454 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) [2023-11-06 22:13:23,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:13:23,788 INFO L93 Difference]: Finished difference Result 628 states and 798 transitions. [2023-11-06 22:13:23,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:13:23,789 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) Word has length 165 [2023-11-06 22:13:23,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:13:23,811 INFO L225 Difference]: With dead ends: 628 [2023-11-06 22:13:23,811 INFO L226 Difference]: Without dead ends: 382 [2023-11-06 22:13:23,812 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:13:23,813 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 67 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:13:23,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 291 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:13:23,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2023-11-06 22:13:23,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 306. [2023-11-06 22:13:23,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 212 states have (on average 1.150943396226415) internal successors, (244), 214 states have internal predecessors, (244), 73 states have call successors, (73), 20 states have call predecessors, (73), 20 states have return successors, (73), 71 states have call predecessors, (73), 73 states have call successors, (73) [2023-11-06 22:13:23,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 390 transitions. [2023-11-06 22:13:23,878 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 390 transitions. Word has length 165 [2023-11-06 22:13:23,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:13:23,879 INFO L495 AbstractCegarLoop]: Abstraction has 306 states and 390 transitions. [2023-11-06 22:13:23,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) [2023-11-06 22:13:23,879 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 390 transitions. [2023-11-06 22:13:23,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2023-11-06 22:13:23,882 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:13:23,882 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:13:23,889 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b50886-6df6-4505-ae3a-4d238f822348/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-06 22:13:24,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b50886-6df6-4505-ae3a-4d238f822348/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-06 22:13:24,089 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:13:24,090 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:13:24,090 INFO L85 PathProgramCache]: Analyzing trace with hash -321763543, now seen corresponding path program 1 times [2023-11-06 22:13:24,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:13:24,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698019680] [2023-11-06 22:13:24,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:13:24,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:13:24,119 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:13:24,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [780234875] [2023-11-06 22:13:24,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:13:24,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:13:24,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b50886-6df6-4505-ae3a-4d238f822348/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:13:24,121 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b50886-6df6-4505-ae3a-4d238f822348/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:13:24,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b50886-6df6-4505-ae3a-4d238f822348/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 22:13:24,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:13:24,449 INFO L262 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-06 22:13:24,456 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:13:36,311 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 123 proven. 72 refuted. 0 times theorem prover too weak. 1105 trivial. 0 not checked. [2023-11-06 22:13:36,311 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:13:45,044 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1300 trivial. 0 not checked. [2023-11-06 22:13:45,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:13:45,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698019680] [2023-11-06 22:13:45,044 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:13:45,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780234875] [2023-11-06 22:13:45,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780234875] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 22:13:45,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:13:45,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [14] total 22 [2023-11-06 22:13:45,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220470348] [2023-11-06 22:13:45,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:13:45,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 22:13:45,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:13:45,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 22:13:45,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=346, Unknown=0, NotChecked=0, Total=462 [2023-11-06 22:13:45,047 INFO L87 Difference]: Start difference. First operand 306 states and 390 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) [2023-11-06 22:13:52,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:13:52,467 INFO L93 Difference]: Finished difference Result 624 states and 773 transitions. [2023-11-06 22:13:52,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-06 22:13:52,468 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) Word has length 165 [2023-11-06 22:13:52,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:13:52,472 INFO L225 Difference]: With dead ends: 624 [2023-11-06 22:13:52,472 INFO L226 Difference]: Without dead ends: 424 [2023-11-06 22:13:52,473 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 308 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=252, Invalid=804, Unknown=0, NotChecked=0, Total=1056 [2023-11-06 22:13:52,474 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 183 mSDsluCounter, 482 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 597 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:13:52,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 597 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-11-06 22:13:52,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2023-11-06 22:13:52,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 306. [2023-11-06 22:13:52,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 212 states have (on average 1.150943396226415) internal successors, (244), 214 states have internal predecessors, (244), 73 states have call successors, (73), 20 states have call predecessors, (73), 20 states have return successors, (73), 71 states have call predecessors, (73), 73 states have call successors, (73) [2023-11-06 22:13:52,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 390 transitions. [2023-11-06 22:13:52,539 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 390 transitions. Word has length 165 [2023-11-06 22:13:52,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:13:52,540 INFO L495 AbstractCegarLoop]: Abstraction has 306 states and 390 transitions. [2023-11-06 22:13:52,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) [2023-11-06 22:13:52,540 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 390 transitions. [2023-11-06 22:13:52,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2023-11-06 22:13:52,542 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:13:52,543 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:13:52,550 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b50886-6df6-4505-ae3a-4d238f822348/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 22:13:52,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b50886-6df6-4505-ae3a-4d238f822348/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-06 22:13:52,750 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:13:52,750 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:13:52,750 INFO L85 PathProgramCache]: Analyzing trace with hash -746074779, now seen corresponding path program 1 times [2023-11-06 22:13:52,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:13:52,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086213114] [2023-11-06 22:13:52,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:13:52,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:13:52,776 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:13:52,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2037652093] [2023-11-06 22:13:52,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:13:52,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:13:52,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b50886-6df6-4505-ae3a-4d238f822348/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:13:52,778 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b50886-6df6-4505-ae3a-4d238f822348/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:13:52,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b50886-6df6-4505-ae3a-4d238f822348/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 22:13:52,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:13:52,969 INFO L262 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-06 22:13:52,974 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:13:54,010 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 25 proven. 75 refuted. 0 times theorem prover too weak. 1200 trivial. 0 not checked. [2023-11-06 22:13:54,010 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:13:54,939 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 1225 trivial. 0 not checked. [2023-11-06 22:13:54,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:13:54,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086213114] [2023-11-06 22:13:54,939 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:13:54,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037652093] [2023-11-06 22:13:54,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037652093] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:13:54,940 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:13:54,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2023-11-06 22:13:54,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643515803] [2023-11-06 22:13:54,940 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:13:54,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-06 22:13:54,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:13:54,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-06 22:13:54,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2023-11-06 22:13:54,943 INFO L87 Difference]: Start difference. First operand 306 states and 390 transitions. Second operand has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 4 states have call successors, (52), 3 states have call predecessors, (52), 4 states have return successors, (52), 2 states have call predecessors, (52), 4 states have call successors, (52) [2023-11-06 22:13:56,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:13:56,418 INFO L93 Difference]: Finished difference Result 576 states and 722 transitions. [2023-11-06 22:13:56,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-06 22:13:56,419 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 4 states have call successors, (52), 3 states have call predecessors, (52), 4 states have return successors, (52), 2 states have call predecessors, (52), 4 states have call successors, (52) Word has length 165 [2023-11-06 22:13:56,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:13:56,422 INFO L225 Difference]: With dead ends: 576 [2023-11-06 22:13:56,423 INFO L226 Difference]: Without dead ends: 357 [2023-11-06 22:13:56,424 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 314 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=264, Invalid=728, Unknown=0, NotChecked=0, Total=992 [2023-11-06 22:13:56,425 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 420 mSDsluCounter, 441 mSDsCounter, 0 mSdLazyCounter, 788 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 445 SdHoareTripleChecker+Valid, 516 SdHoareTripleChecker+Invalid, 941 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 788 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:13:56,426 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [445 Valid, 516 Invalid, 941 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 788 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-06 22:13:56,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2023-11-06 22:13:56,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 300. [2023-11-06 22:13:56,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 206 states have (on average 1.1310679611650485) internal successors, (233), 208 states have internal predecessors, (233), 73 states have call successors, (73), 20 states have call predecessors, (73), 20 states have return successors, (73), 71 states have call predecessors, (73), 73 states have call successors, (73) [2023-11-06 22:13:56,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 379 transitions. [2023-11-06 22:13:56,517 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 379 transitions. Word has length 165 [2023-11-06 22:13:56,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:13:56,517 INFO L495 AbstractCegarLoop]: Abstraction has 300 states and 379 transitions. [2023-11-06 22:13:56,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 4 states have call successors, (52), 3 states have call predecessors, (52), 4 states have return successors, (52), 2 states have call predecessors, (52), 4 states have call successors, (52) [2023-11-06 22:13:56,518 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 379 transitions. [2023-11-06 22:13:56,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2023-11-06 22:13:56,520 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:13:56,520 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:13:56,527 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b50886-6df6-4505-ae3a-4d238f822348/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 22:13:56,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b50886-6df6-4505-ae3a-4d238f822348/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:13:56,726 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:13:56,727 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:13:56,727 INFO L85 PathProgramCache]: Analyzing trace with hash 575111338, now seen corresponding path program 1 times [2023-11-06 22:13:56,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:13:56,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380462912] [2023-11-06 22:13:56,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:13:56,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:13:56,756 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:13:56,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [651983302] [2023-11-06 22:13:56,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:13:56,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:13:56,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b50886-6df6-4505-ae3a-4d238f822348/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:13:56,758 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b50886-6df6-4505-ae3a-4d238f822348/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:13:56,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b50886-6df6-4505-ae3a-4d238f822348/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 22:13:56,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:13:56,915 INFO L262 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 22:13:56,926 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:13:56,955 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1300 trivial. 0 not checked. [2023-11-06 22:13:56,956 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:13:56,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:13:56,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380462912] [2023-11-06 22:13:56,956 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:13:56,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651983302] [2023-11-06 22:13:56,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651983302] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:13:56,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:13:56,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:13:56,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9947381] [2023-11-06 22:13:56,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:13:56,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:13:56,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:13:56,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:13:56,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:13:56,959 INFO L87 Difference]: Start difference. First operand 300 states and 379 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) [2023-11-06 22:13:57,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:13:57,146 INFO L93 Difference]: Finished difference Result 504 states and 634 transitions. [2023-11-06 22:13:57,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:13:57,147 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) Word has length 165 [2023-11-06 22:13:57,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:13:57,150 INFO L225 Difference]: With dead ends: 504 [2023-11-06 22:13:57,150 INFO L226 Difference]: Without dead ends: 346 [2023-11-06 22:13:57,151 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:13:57,152 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 57 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:13:57,152 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 274 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:13:57,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2023-11-06 22:13:57,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 296. [2023-11-06 22:13:57,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 202 states have (on average 1.1237623762376239) internal successors, (227), 204 states have internal predecessors, (227), 73 states have call successors, (73), 20 states have call predecessors, (73), 20 states have return successors, (73), 71 states have call predecessors, (73), 73 states have call successors, (73) [2023-11-06 22:13:57,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 373 transitions. [2023-11-06 22:13:57,229 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 373 transitions. Word has length 165 [2023-11-06 22:13:57,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:13:57,230 INFO L495 AbstractCegarLoop]: Abstraction has 296 states and 373 transitions. [2023-11-06 22:13:57,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) [2023-11-06 22:13:57,230 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 373 transitions. [2023-11-06 22:13:57,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2023-11-06 22:13:57,232 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:13:57,232 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:13:57,239 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b50886-6df6-4505-ae3a-4d238f822348/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-06 22:13:57,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b50886-6df6-4505-ae3a-4d238f822348/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:13:57,439 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:13:57,440 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:13:57,440 INFO L85 PathProgramCache]: Analyzing trace with hash -498831446, now seen corresponding path program 1 times [2023-11-06 22:13:57,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:13:57,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265721781] [2023-11-06 22:13:57,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:13:57,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:13:57,463 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:13:57,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [281918504] [2023-11-06 22:13:57,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:13:57,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:13:57,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b50886-6df6-4505-ae3a-4d238f822348/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:13:57,465 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b50886-6df6-4505-ae3a-4d238f822348/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:13:57,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b50886-6df6-4505-ae3a-4d238f822348/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 22:13:57,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:13:57,657 INFO L262 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-06 22:13:57,665 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:14:00,577 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 577 proven. 183 refuted. 0 times theorem prover too weak. 540 trivial. 0 not checked. [2023-11-06 22:14:00,577 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:14:07,529 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1300 trivial. 0 not checked. [2023-11-06 22:14:07,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:14:07,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265721781] [2023-11-06 22:14:07,529 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:14:07,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281918504] [2023-11-06 22:14:07,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281918504] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 22:14:07,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:14:07,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [19] total 26 [2023-11-06 22:14:07,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570903168] [2023-11-06 22:14:07,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:14:07,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 22:14:07,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:14:07,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 22:14:07,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=499, Unknown=0, NotChecked=0, Total=650 [2023-11-06 22:14:07,532 INFO L87 Difference]: Start difference. First operand 296 states and 373 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) [2023-11-06 22:14:09,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:14:09,679 INFO L93 Difference]: Finished difference Result 492 states and 620 transitions. [2023-11-06 22:14:09,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-06 22:14:09,684 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) Word has length 165 [2023-11-06 22:14:09,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:14:09,687 INFO L225 Difference]: With dead ends: 492 [2023-11-06 22:14:09,687 INFO L226 Difference]: Without dead ends: 338 [2023-11-06 22:14:09,688 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 305 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=269, Invalid=921, Unknown=0, NotChecked=0, Total=1190 [2023-11-06 22:14:09,689 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 230 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-06 22:14:09,690 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [230 Valid, 357 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-06 22:14:09,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2023-11-06 22:14:09,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 304. [2023-11-06 22:14:09,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 210 states have (on average 1.1285714285714286) internal successors, (237), 212 states have internal predecessors, (237), 73 states have call successors, (73), 20 states have call predecessors, (73), 20 states have return successors, (73), 71 states have call predecessors, (73), 73 states have call successors, (73) [2023-11-06 22:14:09,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 383 transitions. [2023-11-06 22:14:09,787 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 383 transitions. Word has length 165 [2023-11-06 22:14:09,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:14:09,788 INFO L495 AbstractCegarLoop]: Abstraction has 304 states and 383 transitions. [2023-11-06 22:14:09,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) [2023-11-06 22:14:09,788 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 383 transitions. [2023-11-06 22:14:09,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2023-11-06 22:14:09,790 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:14:09,790 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:14:09,797 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b50886-6df6-4505-ae3a-4d238f822348/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-06 22:14:09,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b50886-6df6-4505-ae3a-4d238f822348/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-06 22:14:09,997 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:14:09,997 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:14:09,998 INFO L85 PathProgramCache]: Analyzing trace with hash -240666008, now seen corresponding path program 1 times [2023-11-06 22:14:09,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:14:09,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969346322] [2023-11-06 22:14:09,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:14:09,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:14:10,023 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:14:10,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [174014041] [2023-11-06 22:14:10,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:14:10,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:14:10,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b50886-6df6-4505-ae3a-4d238f822348/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:14:10,025 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b50886-6df6-4505-ae3a-4d238f822348/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:14:10,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b50886-6df6-4505-ae3a-4d238f822348/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-06 22:14:10,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:14:10,233 INFO L262 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-06 22:14:10,240 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:14:13,242 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 577 proven. 183 refuted. 0 times theorem prover too weak. 540 trivial. 0 not checked. [2023-11-06 22:14:13,243 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:14:19,965 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1300 trivial. 0 not checked. [2023-11-06 22:14:19,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:14:19,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969346322] [2023-11-06 22:14:19,966 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:14:19,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174014041] [2023-11-06 22:14:19,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174014041] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 22:14:19,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:14:19,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [19] total 26 [2023-11-06 22:14:19,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121628621] [2023-11-06 22:14:19,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:14:19,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 22:14:19,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:14:19,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 22:14:19,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=499, Unknown=0, NotChecked=0, Total=650 [2023-11-06 22:14:19,969 INFO L87 Difference]: Start difference. First operand 304 states and 383 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) [2023-11-06 22:14:22,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:14:22,070 INFO L93 Difference]: Finished difference Result 500 states and 629 transitions. [2023-11-06 22:14:22,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-06 22:14:22,071 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) Word has length 165 [2023-11-06 22:14:22,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:14:22,075 INFO L225 Difference]: With dead ends: 500 [2023-11-06 22:14:22,075 INFO L226 Difference]: Without dead ends: 338 [2023-11-06 22:14:22,076 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 305 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=269, Invalid=921, Unknown=0, NotChecked=0, Total=1190 [2023-11-06 22:14:22,077 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 186 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-06 22:14:22,078 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 404 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-06 22:14:22,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2023-11-06 22:14:22,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 304. [2023-11-06 22:14:22,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 210 states have (on average 1.1285714285714286) internal successors, (237), 212 states have internal predecessors, (237), 73 states have call successors, (73), 20 states have call predecessors, (73), 20 states have return successors, (73), 71 states have call predecessors, (73), 73 states have call successors, (73) [2023-11-06 22:14:22,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 383 transitions. [2023-11-06 22:14:22,162 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 383 transitions. Word has length 165 [2023-11-06 22:14:22,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:14:22,162 INFO L495 AbstractCegarLoop]: Abstraction has 304 states and 383 transitions. [2023-11-06 22:14:22,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) [2023-11-06 22:14:22,163 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 383 transitions. [2023-11-06 22:14:22,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2023-11-06 22:14:22,164 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:14:22,164 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:14:22,179 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b50886-6df6-4505-ae3a-4d238f822348/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-06 22:14:22,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b50886-6df6-4505-ae3a-4d238f822348/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:14:22,381 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:14:22,381 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:14:22,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1394223894, now seen corresponding path program 1 times [2023-11-06 22:14:22,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:14:22,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048856546] [2023-11-06 22:14:22,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:14:22,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:14:22,428 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:14:22,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [153309996] [2023-11-06 22:14:22,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:14:22,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:14:22,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b50886-6df6-4505-ae3a-4d238f822348/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:14:22,430 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b50886-6df6-4505-ae3a-4d238f822348/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:14:22,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b50886-6df6-4505-ae3a-4d238f822348/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-06 22:14:22,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:14:22,604 INFO L262 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-06 22:14:22,614 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:14:33,014 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 52 proven. 144 refuted. 0 times theorem prover too weak. 1104 trivial. 0 not checked. [2023-11-06 22:14:33,014 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:14:38,960 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1300 trivial. 0 not checked. [2023-11-06 22:14:38,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:14:38,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048856546] [2023-11-06 22:14:38,961 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:14:38,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153309996] [2023-11-06 22:14:38,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153309996] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 22:14:38,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:14:38,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [16] total 23 [2023-11-06 22:14:38,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879471461] [2023-11-06 22:14:38,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:14:38,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 22:14:38,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:14:38,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 22:14:38,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2023-11-06 22:14:38,964 INFO L87 Difference]: Start difference. First operand 304 states and 383 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) [2023-11-06 22:14:40,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:14:40,689 INFO L93 Difference]: Finished difference Result 534 states and 666 transitions. [2023-11-06 22:14:40,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-06 22:14:40,690 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) Word has length 166 [2023-11-06 22:14:40,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:14:40,693 INFO L225 Difference]: With dead ends: 534 [2023-11-06 22:14:40,694 INFO L226 Difference]: Without dead ends: 372 [2023-11-06 22:14:40,695 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 309 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=254, Invalid=802, Unknown=0, NotChecked=0, Total=1056 [2023-11-06 22:14:40,695 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 167 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 461 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-06 22:14:40,696 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 461 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-06 22:14:40,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2023-11-06 22:14:40,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 310. [2023-11-06 22:14:40,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 216 states have (on average 1.1296296296296295) internal successors, (244), 218 states have internal predecessors, (244), 73 states have call successors, (73), 20 states have call predecessors, (73), 20 states have return successors, (73), 71 states have call predecessors, (73), 73 states have call successors, (73) [2023-11-06 22:14:40,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 390 transitions. [2023-11-06 22:14:40,789 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 390 transitions. Word has length 166 [2023-11-06 22:14:40,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:14:40,790 INFO L495 AbstractCegarLoop]: Abstraction has 310 states and 390 transitions. [2023-11-06 22:14:40,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) [2023-11-06 22:14:40,790 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 390 transitions. [2023-11-06 22:14:40,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2023-11-06 22:14:40,792 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:14:40,792 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:14:40,812 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b50886-6df6-4505-ae3a-4d238f822348/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-06 22:14:41,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b50886-6df6-4505-ae3a-4d238f822348/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:14:41,008 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:14:41,008 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:14:41,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1981029908, now seen corresponding path program 1 times [2023-11-06 22:14:41,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:14:41,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359369766] [2023-11-06 22:14:41,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:14:41,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:14:41,041 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:14:41,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1483387682] [2023-11-06 22:14:41,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:14:41,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:14:41,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b50886-6df6-4505-ae3a-4d238f822348/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:14:41,043 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b50886-6df6-4505-ae3a-4d238f822348/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:14:41,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b50886-6df6-4505-ae3a-4d238f822348/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-06 22:14:41,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:14:41,234 INFO L262 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-06 22:14:41,240 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:14:51,019 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 52 proven. 144 refuted. 0 times theorem prover too weak. 1104 trivial. 0 not checked. [2023-11-06 22:14:51,019 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:14:56,828 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1300 trivial. 0 not checked. [2023-11-06 22:14:56,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:14:56,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359369766] [2023-11-06 22:14:56,829 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:14:56,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483387682] [2023-11-06 22:14:56,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483387682] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 22:14:56,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:14:56,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [16] total 23 [2023-11-06 22:14:56,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396586166] [2023-11-06 22:14:56,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:14:56,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 22:14:56,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:14:56,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 22:14:56,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2023-11-06 22:14:56,833 INFO L87 Difference]: Start difference. First operand 310 states and 390 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) [2023-11-06 22:14:58,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:14:58,493 INFO L93 Difference]: Finished difference Result 540 states and 672 transitions. [2023-11-06 22:14:58,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-06 22:14:58,494 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) Word has length 166 [2023-11-06 22:14:58,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:14:58,499 INFO L225 Difference]: With dead ends: 540 [2023-11-06 22:14:58,499 INFO L226 Difference]: Without dead ends: 372 [2023-11-06 22:14:58,502 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 309 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=254, Invalid=802, Unknown=0, NotChecked=0, Total=1056 [2023-11-06 22:14:58,503 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 139 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 490 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-06 22:14:58,503 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 490 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-06 22:14:58,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2023-11-06 22:14:58,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 307. [2023-11-06 22:14:58,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 213 states have (on average 1.1267605633802817) internal successors, (240), 215 states have internal predecessors, (240), 73 states have call successors, (73), 20 states have call predecessors, (73), 20 states have return successors, (73), 71 states have call predecessors, (73), 73 states have call successors, (73) [2023-11-06 22:14:58,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 386 transitions. [2023-11-06 22:14:58,617 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 386 transitions. Word has length 166 [2023-11-06 22:14:58,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:14:58,618 INFO L495 AbstractCegarLoop]: Abstraction has 307 states and 386 transitions. [2023-11-06 22:14:58,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) [2023-11-06 22:14:58,618 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 386 transitions. [2023-11-06 22:14:58,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2023-11-06 22:14:58,620 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:14:58,620 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:14:58,627 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b50886-6df6-4505-ae3a-4d238f822348/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-06 22:14:58,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b50886-6df6-4505-ae3a-4d238f822348/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:14:58,827 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:14:58,828 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:14:58,828 INFO L85 PathProgramCache]: Analyzing trace with hash 194124008, now seen corresponding path program 1 times [2023-11-06 22:14:58,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:14:58,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377436272] [2023-11-06 22:14:58,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:14:58,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:14:58,853 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:14:58,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [274436093] [2023-11-06 22:14:58,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:14:58,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:14:58,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b50886-6df6-4505-ae3a-4d238f822348/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:14:58,855 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b50886-6df6-4505-ae3a-4d238f822348/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:14:58,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b50886-6df6-4505-ae3a-4d238f822348/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-06 22:14:59,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:14:59,043 INFO L262 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-06 22:14:59,046 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:14:59,693 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 25 proven. 75 refuted. 0 times theorem prover too weak. 1200 trivial. 0 not checked. [2023-11-06 22:14:59,693 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:15:00,046 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 1225 trivial. 0 not checked. [2023-11-06 22:15:00,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:15:00,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377436272] [2023-11-06 22:15:00,047 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:15:00,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274436093] [2023-11-06 22:15:00,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274436093] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:15:00,047 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:15:00,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2023-11-06 22:15:00,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972392989] [2023-11-06 22:15:00,047 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:15:00,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-06 22:15:00,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:15:00,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-06 22:15:00,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2023-11-06 22:15:00,049 INFO L87 Difference]: Start difference. First operand 307 states and 386 transitions. Second operand has 15 states, 15 states have (on average 4.533333333333333) internal successors, (68), 15 states have internal predecessors, (68), 4 states have call successors, (52), 3 states have call predecessors, (52), 4 states have return successors, (52), 2 states have call predecessors, (52), 4 states have call successors, (52) [2023-11-06 22:15:01,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:15:01,419 INFO L93 Difference]: Finished difference Result 613 states and 752 transitions. [2023-11-06 22:15:01,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-06 22:15:01,421 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.533333333333333) internal successors, (68), 15 states have internal predecessors, (68), 4 states have call successors, (52), 3 states have call predecessors, (52), 4 states have return successors, (52), 2 states have call predecessors, (52), 4 states have call successors, (52) Word has length 166 [2023-11-06 22:15:01,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:15:01,424 INFO L225 Difference]: With dead ends: 613 [2023-11-06 22:15:01,424 INFO L226 Difference]: Without dead ends: 396 [2023-11-06 22:15:01,425 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 319 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=197, Invalid=559, Unknown=0, NotChecked=0, Total=756 [2023-11-06 22:15:01,426 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 420 mSDsluCounter, 489 mSDsCounter, 0 mSdLazyCounter, 773 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 446 SdHoareTripleChecker+Valid, 577 SdHoareTripleChecker+Invalid, 933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 773 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:15:01,426 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [446 Valid, 577 Invalid, 933 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 773 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-06 22:15:01,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2023-11-06 22:15:01,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 295. [2023-11-06 22:15:01,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 201 states have (on average 1.1194029850746268) internal successors, (225), 203 states have internal predecessors, (225), 73 states have call successors, (73), 20 states have call predecessors, (73), 20 states have return successors, (73), 71 states have call predecessors, (73), 73 states have call successors, (73) [2023-11-06 22:15:01,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 371 transitions. [2023-11-06 22:15:01,528 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 371 transitions. Word has length 166 [2023-11-06 22:15:01,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:15:01,528 INFO L495 AbstractCegarLoop]: Abstraction has 295 states and 371 transitions. [2023-11-06 22:15:01,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.533333333333333) internal successors, (68), 15 states have internal predecessors, (68), 4 states have call successors, (52), 3 states have call predecessors, (52), 4 states have return successors, (52), 2 states have call predecessors, (52), 4 states have call successors, (52) [2023-11-06 22:15:01,529 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 371 transitions. [2023-11-06 22:15:01,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2023-11-06 22:15:01,530 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:15:01,530 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:15:01,537 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b50886-6df6-4505-ae3a-4d238f822348/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-06 22:15:01,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b50886-6df6-4505-ae3a-4d238f822348/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:15:01,737 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:15:01,737 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:15:01,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1741298501, now seen corresponding path program 1 times [2023-11-06 22:15:01,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:15:01,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495867848] [2023-11-06 22:15:01,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:15:01,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:15:01,758 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:15:01,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1246881939] [2023-11-06 22:15:01,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:15:01,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:15:01,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b50886-6df6-4505-ae3a-4d238f822348/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:15:01,760 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b50886-6df6-4505-ae3a-4d238f822348/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:15:01,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26b50886-6df6-4505-ae3a-4d238f822348/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-06 22:15:01,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:15:01,903 INFO L262 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-06 22:15:01,907 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:16:25,568 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 6 proven. 69 refuted. 0 times theorem prover too weak. 1225 trivial. 0 not checked. [2023-11-06 22:16:25,568 INFO L327 TraceCheckSpWp]: Computing backward predicates...