./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-75.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec3c8fe-a195-4138-ad00-fb03fee8dd4b/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec3c8fe-a195-4138-ad00-fb03fee8dd4b/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_cec3c8fe-a195-4138-ad00-fb03fee8dd4b/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec3c8fe-a195-4138-ad00-fb03fee8dd4b/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-75.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec3c8fe-a195-4138-ad00-fb03fee8dd4b/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_cec3c8fe-a195-4138-ad00-fb03fee8dd4b/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 5f27064a0b5796ba4fcefa469388f6a0b44b51572a6c95971fa540335b609a62 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:37:48,357 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:37:48,436 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec3c8fe-a195-4138-ad00-fb03fee8dd4b/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 22:37:48,442 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:37:48,443 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:37:48,473 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:37:48,474 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:37:48,474 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:37:48,475 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:37:48,476 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:37:48,476 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:37:48,477 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:37:48,478 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:37:48,478 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:37:48,479 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 22:37:48,479 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:37:48,480 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:37:48,481 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:37:48,481 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:37:48,482 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 22:37:48,482 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:37:48,483 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 22:37:48,484 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:37:48,484 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 22:37:48,485 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:37:48,486 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:37:48,486 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:37:48,487 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:37:48,487 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:37:48,488 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:37:48,488 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:37:48,489 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 22:37:48,489 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:37:48,489 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:37:48,490 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:37:48,490 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 22:37:48,491 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:37:48,491 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:37:48,492 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:37:48,492 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_cec3c8fe-a195-4138-ad00-fb03fee8dd4b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec3c8fe-a195-4138-ad00-fb03fee8dd4b/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5f27064a0b5796ba4fcefa469388f6a0b44b51572a6c95971fa540335b609a62 [2023-11-06 22:37:48,767 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:37:48,816 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:37:48,819 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:37:48,821 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:37:48,821 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:37:48,822 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec3c8fe-a195-4138-ad00-fb03fee8dd4b/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-75.i [2023-11-06 22:37:51,906 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:37:52,237 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:37:52,238 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec3c8fe-a195-4138-ad00-fb03fee8dd4b/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-75.i [2023-11-06 22:37:52,256 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec3c8fe-a195-4138-ad00-fb03fee8dd4b/bin/uautomizer-verify-WvqO1wxjHP/data/fff334900/182384f23a14492cbf0e844703bda1e8/FLAGe0a85c4b5 [2023-11-06 22:37:52,271 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec3c8fe-a195-4138-ad00-fb03fee8dd4b/bin/uautomizer-verify-WvqO1wxjHP/data/fff334900/182384f23a14492cbf0e844703bda1e8 [2023-11-06 22:37:52,273 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:37:52,275 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:37:52,277 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:37:52,277 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:37:52,282 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:37:52,283 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:37:52" (1/1) ... [2023-11-06 22:37:52,286 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36462734 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:37:52, skipping insertion in model container [2023-11-06 22:37:52,286 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:37:52" (1/1) ... [2023-11-06 22:37:52,382 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:37:52,552 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_cec3c8fe-a195-4138-ad00-fb03fee8dd4b/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-75.i[916,929] [2023-11-06 22:37:52,783 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:37:52,823 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:37:52,843 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_cec3c8fe-a195-4138-ad00-fb03fee8dd4b/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-75.i[916,929] [2023-11-06 22:37:52,997 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:37:53,040 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:37:53,041 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:37:53 WrapperNode [2023-11-06 22:37:53,041 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:37:53,042 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:37:53,043 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:37:53,043 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:37:53,049 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:37:53" (1/1) ... [2023-11-06 22:37:53,085 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:37:53" (1/1) ... [2023-11-06 22:37:53,189 INFO L138 Inliner]: procedures = 26, calls = 136, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 1143 [2023-11-06 22:37:53,195 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:37:53,196 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:37:53,199 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:37:53,200 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:37:53,212 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:37:53" (1/1) ... [2023-11-06 22:37:53,212 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:37:53" (1/1) ... [2023-11-06 22:37:53,226 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:37:53" (1/1) ... [2023-11-06 22:37:53,228 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:37:53" (1/1) ... [2023-11-06 22:37:53,282 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:37:53" (1/1) ... [2023-11-06 22:37:53,291 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:37:53" (1/1) ... [2023-11-06 22:37:53,321 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:37:53" (1/1) ... [2023-11-06 22:37:53,330 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:37:53" (1/1) ... [2023-11-06 22:37:53,344 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:37:53,348 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:37:53,348 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:37:53,348 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:37:53,349 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:37:53" (1/1) ... [2023-11-06 22:37:53,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:37:53,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec3c8fe-a195-4138-ad00-fb03fee8dd4b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:37:53,382 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec3c8fe-a195-4138-ad00-fb03fee8dd4b/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:37:53,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec3c8fe-a195-4138-ad00-fb03fee8dd4b/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:37:53,428 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:37:53,429 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-06 22:37:53,429 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-06 22:37:53,429 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:37:53,429 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:37:53,430 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:37:53,629 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:37:53,631 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:37:55,093 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:37:55,115 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:37:55,115 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-06 22:37:55,118 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:37:55 BoogieIcfgContainer [2023-11-06 22:37:55,119 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:37:55,123 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:37:55,123 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:37:55,127 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:37:55,127 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:37:52" (1/3) ... [2023-11-06 22:37:55,128 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4036d905 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:37:55, skipping insertion in model container [2023-11-06 22:37:55,128 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:37:53" (2/3) ... [2023-11-06 22:37:55,130 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4036d905 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:37:55, skipping insertion in model container [2023-11-06 22:37:55,130 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:37:55" (3/3) ... [2023-11-06 22:37:55,131 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_fillercode_fillercodesize_ps-cn-500_file-75.i [2023-11-06 22:37:55,151 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:37:55,152 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 22:37:55,230 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:37:55,238 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;@534a1dc8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:37:55,238 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-06 22:37:55,245 INFO L276 IsEmpty]: Start isEmpty. Operand has 411 states, 285 states have (on average 1.631578947368421) internal successors, (465), 286 states have internal predecessors, (465), 123 states have call successors, (123), 1 states have call predecessors, (123), 1 states have return successors, (123), 123 states have call predecessors, (123), 123 states have call successors, (123) [2023-11-06 22:37:55,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 788 [2023-11-06 22:37:55,306 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:37:55,308 INFO L195 NwaCegarLoop]: trace histogram [123, 123, 123, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:37:55,308 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:37:55,314 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:37:55,314 INFO L85 PathProgramCache]: Analyzing trace with hash -1821644460, now seen corresponding path program 1 times [2023-11-06 22:37:55,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:37:55,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073655782] [2023-11-06 22:37:55,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:37:55,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:37:55,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:55,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:37:55,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073655782] [2023-11-06 22:37:55,873 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-06 22:37:55,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177604069] [2023-11-06 22:37:55,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:37:55,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:37:55,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec3c8fe-a195-4138-ad00-fb03fee8dd4b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:37:55,880 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec3c8fe-a195-4138-ad00-fb03fee8dd4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:37:55,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec3c8fe-a195-4138-ad00-fb03fee8dd4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:37:56,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:56,521 INFO L262 TraceCheckSpWp]: Trace formula consists of 1866 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-06 22:37:56,566 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:37:56,691 INFO L134 CoverageAnalysis]: Checked inductivity of 30012 backedges. 244 proven. 0 refuted. 0 times theorem prover too weak. 29768 trivial. 0 not checked. [2023-11-06 22:37:56,696 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:37:56,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177604069] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:37:56,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:37:56,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:37:56,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779840447] [2023-11-06 22:37:56,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:37:56,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-06 22:37:56,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:37:56,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-06 22:37:56,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 22:37:56,759 INFO L87 Difference]: Start difference. First operand has 411 states, 285 states have (on average 1.631578947368421) internal successors, (465), 286 states have internal predecessors, (465), 123 states have call successors, (123), 1 states have call predecessors, (123), 1 states have return successors, (123), 123 states have call predecessors, (123), 123 states have call successors, (123) Second operand has 2 states, 2 states have (on average 88.5) internal successors, (177), 2 states have internal predecessors, (177), 2 states have call successors, (123), 2 states have call predecessors, (123), 1 states have return successors, (123), 1 states have call predecessors, (123), 2 states have call successors, (123) [2023-11-06 22:37:56,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:37:56,848 INFO L93 Difference]: Finished difference Result 815 states and 1539 transitions. [2023-11-06 22:37:56,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-06 22:37:56,851 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 88.5) internal successors, (177), 2 states have internal predecessors, (177), 2 states have call successors, (123), 2 states have call predecessors, (123), 1 states have return successors, (123), 1 states have call predecessors, (123), 2 states have call successors, (123) Word has length 787 [2023-11-06 22:37:56,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:37:56,865 INFO L225 Difference]: With dead ends: 815 [2023-11-06 22:37:56,865 INFO L226 Difference]: Without dead ends: 407 [2023-11-06 22:37:56,875 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 786 GetRequests, 786 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 22:37:56,878 INFO L413 NwaCegarLoop]: 703 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 703 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:37:56,879 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 703 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:37:56,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2023-11-06 22:37:57,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 407. [2023-11-06 22:37:57,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 282 states have (on average 1.6205673758865249) internal successors, (457), 282 states have internal predecessors, (457), 123 states have call successors, (123), 1 states have call predecessors, (123), 1 states have return successors, (123), 123 states have call predecessors, (123), 123 states have call successors, (123) [2023-11-06 22:37:57,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 703 transitions. [2023-11-06 22:37:57,057 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 703 transitions. Word has length 787 [2023-11-06 22:37:57,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:37:57,059 INFO L495 AbstractCegarLoop]: Abstraction has 407 states and 703 transitions. [2023-11-06 22:37:57,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 88.5) internal successors, (177), 2 states have internal predecessors, (177), 2 states have call successors, (123), 2 states have call predecessors, (123), 1 states have return successors, (123), 1 states have call predecessors, (123), 2 states have call successors, (123) [2023-11-06 22:37:57,060 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 703 transitions. [2023-11-06 22:37:57,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 789 [2023-11-06 22:37:57,086 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:37:57,087 INFO L195 NwaCegarLoop]: trace histogram [123, 123, 123, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:37:57,101 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec3c8fe-a195-4138-ad00-fb03fee8dd4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 22:37:57,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec3c8fe-a195-4138-ad00-fb03fee8dd4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-06 22:37:57,297 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:37:57,297 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:37:57,298 INFO L85 PathProgramCache]: Analyzing trace with hash 386855167, now seen corresponding path program 1 times [2023-11-06 22:37:57,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:37:57,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858677279] [2023-11-06 22:37:57,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:37:57,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:37:57,484 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:37:57,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1276369013] [2023-11-06 22:37:57,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:37:57,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:37:57,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec3c8fe-a195-4138-ad00-fb03fee8dd4b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:37:57,486 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec3c8fe-a195-4138-ad00-fb03fee8dd4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:37:57,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec3c8fe-a195-4138-ad00-fb03fee8dd4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 22:37:58,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:58,131 INFO L262 TraceCheckSpWp]: Trace formula consists of 1869 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 22:37:58,148 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:37:58,230 INFO L134 CoverageAnalysis]: Checked inductivity of 30012 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30012 trivial. 0 not checked. [2023-11-06 22:37:58,230 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:37:58,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:37:58,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858677279] [2023-11-06 22:37:58,234 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:37:58,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276369013] [2023-11-06 22:37:58,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276369013] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:37:58,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:37:58,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:37:58,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145815789] [2023-11-06 22:37:58,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:37:58,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:37:58,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:37:58,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:37:58,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:37:58,244 INFO L87 Difference]: Start difference. First operand 407 states and 703 transitions. Second operand has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 1 states have call successors, (123), 1 states have call predecessors, (123), 1 states have return successors, (123), 1 states have call predecessors, (123), 1 states have call successors, (123) [2023-11-06 22:37:58,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:37:58,338 INFO L93 Difference]: Finished difference Result 816 states and 1412 transitions. [2023-11-06 22:37:58,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:37:58,340 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 1 states have call successors, (123), 1 states have call predecessors, (123), 1 states have return successors, (123), 1 states have call predecessors, (123), 1 states have call successors, (123) Word has length 788 [2023-11-06 22:37:58,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:37:58,352 INFO L225 Difference]: With dead ends: 816 [2023-11-06 22:37:58,352 INFO L226 Difference]: Without dead ends: 412 [2023-11-06 22:37:58,356 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 787 GetRequests, 786 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 22:37:58,357 INFO L413 NwaCegarLoop]: 704 mSDtfsCounter, 6 mSDsluCounter, 694 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 1398 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:37:58,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 1398 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:37:58,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2023-11-06 22:37:58,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 408. [2023-11-06 22:37:58,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 283 states have (on average 1.6183745583038869) internal successors, (458), 283 states have internal predecessors, (458), 123 states have call successors, (123), 1 states have call predecessors, (123), 1 states have return successors, (123), 123 states have call predecessors, (123), 123 states have call successors, (123) [2023-11-06 22:37:58,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 704 transitions. [2023-11-06 22:37:58,432 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 704 transitions. Word has length 788 [2023-11-06 22:37:58,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:37:58,437 INFO L495 AbstractCegarLoop]: Abstraction has 408 states and 704 transitions. [2023-11-06 22:37:58,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 1 states have call successors, (123), 1 states have call predecessors, (123), 1 states have return successors, (123), 1 states have call predecessors, (123), 1 states have call successors, (123) [2023-11-06 22:37:58,439 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 704 transitions. [2023-11-06 22:37:58,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 790 [2023-11-06 22:37:58,451 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:37:58,452 INFO L195 NwaCegarLoop]: trace histogram [123, 123, 123, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:37:58,469 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec3c8fe-a195-4138-ad00-fb03fee8dd4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 22:37:58,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec3c8fe-a195-4138-ad00-fb03fee8dd4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:37:58,664 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:37:58,665 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:37:58,665 INFO L85 PathProgramCache]: Analyzing trace with hash 908177178, now seen corresponding path program 1 times [2023-11-06 22:37:58,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:37:58,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543303355] [2023-11-06 22:37:58,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:37:58,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:37:58,853 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:37:58,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [481397099] [2023-11-06 22:37:58,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:37:58,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:37:58,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec3c8fe-a195-4138-ad00-fb03fee8dd4b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:37:58,859 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec3c8fe-a195-4138-ad00-fb03fee8dd4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:37:58,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec3c8fe-a195-4138-ad00-fb03fee8dd4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 22:37:59,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:59,460 INFO L262 TraceCheckSpWp]: Trace formula consists of 1870 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 22:37:59,513 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:38:00,736 INFO L134 CoverageAnalysis]: Checked inductivity of 30012 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30012 trivial. 0 not checked. [2023-11-06 22:38:00,737 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:38:00,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:38:00,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543303355] [2023-11-06 22:38:00,737 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:38:00,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481397099] [2023-11-06 22:38:00,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481397099] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:38:00,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:38:00,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:38:00,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022081761] [2023-11-06 22:38:00,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:38:00,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:38:00,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:38:00,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:38:00,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:38:00,742 INFO L87 Difference]: Start difference. First operand 408 states and 704 transitions. Second operand has 4 states, 4 states have (on average 44.25) internal successors, (177), 3 states have internal predecessors, (177), 1 states have call successors, (123), 1 states have call predecessors, (123), 1 states have return successors, (123), 1 states have call predecessors, (123), 1 states have call successors, (123) [2023-11-06 22:38:00,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:38:00,839 INFO L93 Difference]: Finished difference Result 1218 states and 2106 transitions. [2023-11-06 22:38:00,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:38:00,840 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 44.25) internal successors, (177), 3 states have internal predecessors, (177), 1 states have call successors, (123), 1 states have call predecessors, (123), 1 states have return successors, (123), 1 states have call predecessors, (123), 1 states have call successors, (123) Word has length 789 [2023-11-06 22:38:00,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:38:00,849 INFO L225 Difference]: With dead ends: 1218 [2023-11-06 22:38:00,849 INFO L226 Difference]: Without dead ends: 813 [2023-11-06 22:38:00,852 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 789 GetRequests, 786 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 22:38:00,853 INFO L413 NwaCegarLoop]: 699 mSDtfsCounter, 352 mSDsluCounter, 1390 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 2089 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:38:00,853 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [352 Valid, 2089 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:38:00,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 813 states. [2023-11-06 22:38:01,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 813 to 805. [2023-11-06 22:38:01,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 805 states, 556 states have (on average 1.6169064748201438) internal successors, (899), 556 states have internal predecessors, (899), 246 states have call successors, (246), 2 states have call predecessors, (246), 2 states have return successors, (246), 246 states have call predecessors, (246), 246 states have call successors, (246) [2023-11-06 22:38:01,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 805 states to 805 states and 1391 transitions. [2023-11-06 22:38:01,015 INFO L78 Accepts]: Start accepts. Automaton has 805 states and 1391 transitions. Word has length 789 [2023-11-06 22:38:01,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:38:01,017 INFO L495 AbstractCegarLoop]: Abstraction has 805 states and 1391 transitions. [2023-11-06 22:38:01,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 44.25) internal successors, (177), 3 states have internal predecessors, (177), 1 states have call successors, (123), 1 states have call predecessors, (123), 1 states have return successors, (123), 1 states have call predecessors, (123), 1 states have call successors, (123) [2023-11-06 22:38:01,018 INFO L276 IsEmpty]: Start isEmpty. Operand 805 states and 1391 transitions. [2023-11-06 22:38:01,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 790 [2023-11-06 22:38:01,028 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:38:01,028 INFO L195 NwaCegarLoop]: trace histogram [123, 123, 123, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:38:01,046 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec3c8fe-a195-4138-ad00-fb03fee8dd4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 22:38:01,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec3c8fe-a195-4138-ad00-fb03fee8dd4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:38:01,239 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:38:01,239 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:38:01,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1652685668, now seen corresponding path program 1 times [2023-11-06 22:38:01,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:38:01,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899140165] [2023-11-06 22:38:01,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:38:01,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:38:01,388 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:38:01,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1676660060] [2023-11-06 22:38:01,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:38:01,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:38:01,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec3c8fe-a195-4138-ad00-fb03fee8dd4b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:38:01,395 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec3c8fe-a195-4138-ad00-fb03fee8dd4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:38:01,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec3c8fe-a195-4138-ad00-fb03fee8dd4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 22:38:01,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:38:01,996 INFO L262 TraceCheckSpWp]: Trace formula consists of 1868 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 22:38:02,012 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:38:02,135 INFO L134 CoverageAnalysis]: Checked inductivity of 30012 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30012 trivial. 0 not checked. [2023-11-06 22:38:02,135 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:38:02,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:38:02,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899140165] [2023-11-06 22:38:02,135 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:38:02,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676660060] [2023-11-06 22:38:02,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676660060] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:38:02,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:38:02,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:38:02,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504368413] [2023-11-06 22:38:02,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:38:02,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:38:02,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:38:02,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:38:02,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:38:02,140 INFO L87 Difference]: Start difference. First operand 805 states and 1391 transitions. Second operand has 3 states, 3 states have (on average 59.0) internal successors, (177), 3 states have internal predecessors, (177), 1 states have call successors, (123), 1 states have call predecessors, (123), 1 states have return successors, (123), 1 states have call predecessors, (123), 1 states have call successors, (123) [2023-11-06 22:38:02,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:38:02,272 INFO L93 Difference]: Finished difference Result 2405 states and 4159 transitions. [2023-11-06 22:38:02,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:38:02,273 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.0) internal successors, (177), 3 states have internal predecessors, (177), 1 states have call successors, (123), 1 states have call predecessors, (123), 1 states have return successors, (123), 1 states have call predecessors, (123), 1 states have call successors, (123) Word has length 789 [2023-11-06 22:38:02,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:38:02,288 INFO L225 Difference]: With dead ends: 2405 [2023-11-06 22:38:02,288 INFO L226 Difference]: Without dead ends: 1603 [2023-11-06 22:38:02,291 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 788 GetRequests, 787 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 22:38:02,294 INFO L413 NwaCegarLoop]: 1147 mSDtfsCounter, 681 mSDsluCounter, 694 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 681 SdHoareTripleChecker+Valid, 1841 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:38:02,295 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [681 Valid, 1841 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:38:02,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1603 states. [2023-11-06 22:38:02,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1603 to 1597. [2023-11-06 22:38:02,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1597 states, 1100 states have (on average 1.6109090909090908) internal successors, (1772), 1100 states have internal predecessors, (1772), 492 states have call successors, (492), 4 states have call predecessors, (492), 4 states have return successors, (492), 492 states have call predecessors, (492), 492 states have call successors, (492) [2023-11-06 22:38:02,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1597 states to 1597 states and 2756 transitions. [2023-11-06 22:38:02,629 INFO L78 Accepts]: Start accepts. Automaton has 1597 states and 2756 transitions. Word has length 789 [2023-11-06 22:38:02,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:38:02,631 INFO L495 AbstractCegarLoop]: Abstraction has 1597 states and 2756 transitions. [2023-11-06 22:38:02,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.0) internal successors, (177), 3 states have internal predecessors, (177), 1 states have call successors, (123), 1 states have call predecessors, (123), 1 states have return successors, (123), 1 states have call predecessors, (123), 1 states have call successors, (123) [2023-11-06 22:38:02,632 INFO L276 IsEmpty]: Start isEmpty. Operand 1597 states and 2756 transitions. [2023-11-06 22:38:02,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 790 [2023-11-06 22:38:02,642 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:38:02,643 INFO L195 NwaCegarLoop]: trace histogram [123, 123, 123, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:38:02,665 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec3c8fe-a195-4138-ad00-fb03fee8dd4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 22:38:02,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec3c8fe-a195-4138-ad00-fb03fee8dd4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:38:02,852 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:38:02,853 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:38:02,853 INFO L85 PathProgramCache]: Analyzing trace with hash -2070552808, now seen corresponding path program 1 times [2023-11-06 22:38:02,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:38:02,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714273111] [2023-11-06 22:38:02,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:38:02,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:38:02,974 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:38:02,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1816470249] [2023-11-06 22:38:02,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:38:02,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:38:02,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec3c8fe-a195-4138-ad00-fb03fee8dd4b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:38:02,980 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec3c8fe-a195-4138-ad00-fb03fee8dd4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:38:03,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec3c8fe-a195-4138-ad00-fb03fee8dd4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 22:38:03,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:38:03,597 INFO L262 TraceCheckSpWp]: Trace formula consists of 1868 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 22:38:03,613 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:38:03,677 INFO L134 CoverageAnalysis]: Checked inductivity of 30012 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30012 trivial. 0 not checked. [2023-11-06 22:38:03,678 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:38:03,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:38:03,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714273111] [2023-11-06 22:38:03,679 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:38:03,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816470249] [2023-11-06 22:38:03,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816470249] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:38:03,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:38:03,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:38:03,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219065036] [2023-11-06 22:38:03,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:38:03,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:38:03,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:38:03,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:38:03,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:38:03,692 INFO L87 Difference]: Start difference. First operand 1597 states and 2756 transitions. Second operand has 3 states, 3 states have (on average 59.0) internal successors, (177), 3 states have internal predecessors, (177), 1 states have call successors, (123), 1 states have call predecessors, (123), 1 states have return successors, (123), 1 states have call predecessors, (123), 1 states have call successors, (123) [2023-11-06 22:38:03,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:38:03,921 INFO L93 Difference]: Finished difference Result 3917 states and 6770 transitions. [2023-11-06 22:38:03,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:38:03,923 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.0) internal successors, (177), 3 states have internal predecessors, (177), 1 states have call successors, (123), 1 states have call predecessors, (123), 1 states have return successors, (123), 1 states have call predecessors, (123), 1 states have call successors, (123) Word has length 789 [2023-11-06 22:38:03,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:38:03,943 INFO L225 Difference]: With dead ends: 3917 [2023-11-06 22:38:03,944 INFO L226 Difference]: Without dead ends: 2323 [2023-11-06 22:38:03,951 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 788 GetRequests, 787 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 22:38:03,952 INFO L413 NwaCegarLoop]: 734 mSDtfsCounter, 312 mSDsluCounter, 682 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 1416 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:38:03,952 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [312 Valid, 1416 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:38:03,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2323 states. [2023-11-06 22:38:04,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2323 to 2317. [2023-11-06 22:38:04,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2317 states, 1704 states have (on average 1.636150234741784) internal successors, (2788), 1708 states have internal predecessors, (2788), 604 states have call successors, (604), 8 states have call predecessors, (604), 8 states have return successors, (604), 600 states have call predecessors, (604), 604 states have call successors, (604) [2023-11-06 22:38:04,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2317 states to 2317 states and 3996 transitions. [2023-11-06 22:38:04,349 INFO L78 Accepts]: Start accepts. Automaton has 2317 states and 3996 transitions. Word has length 789 [2023-11-06 22:38:04,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:38:04,351 INFO L495 AbstractCegarLoop]: Abstraction has 2317 states and 3996 transitions. [2023-11-06 22:38:04,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.0) internal successors, (177), 3 states have internal predecessors, (177), 1 states have call successors, (123), 1 states have call predecessors, (123), 1 states have return successors, (123), 1 states have call predecessors, (123), 1 states have call successors, (123) [2023-11-06 22:38:04,352 INFO L276 IsEmpty]: Start isEmpty. Operand 2317 states and 3996 transitions. [2023-11-06 22:38:04,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 790 [2023-11-06 22:38:04,362 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:38:04,363 INFO L195 NwaCegarLoop]: trace histogram [123, 123, 123, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:38:04,380 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec3c8fe-a195-4138-ad00-fb03fee8dd4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 22:38:04,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec3c8fe-a195-4138-ad00-fb03fee8dd4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:38:04,572 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:38:04,573 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:38:04,573 INFO L85 PathProgramCache]: Analyzing trace with hash -2069400938, now seen corresponding path program 1 times [2023-11-06 22:38:04,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:38:04,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242414306] [2023-11-06 22:38:04,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:38:04,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:38:04,694 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:38:04,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1432524001] [2023-11-06 22:38:04,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:38:04,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:38:04,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec3c8fe-a195-4138-ad00-fb03fee8dd4b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:38:04,696 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec3c8fe-a195-4138-ad00-fb03fee8dd4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:38:04,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec3c8fe-a195-4138-ad00-fb03fee8dd4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 22:38:05,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:38:05,348 INFO L262 TraceCheckSpWp]: Trace formula consists of 1863 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:38:05,365 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:38:07,778 INFO L134 CoverageAnalysis]: Checked inductivity of 30012 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30012 trivial. 0 not checked. [2023-11-06 22:38:07,778 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:38:07,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:38:07,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242414306] [2023-11-06 22:38:07,779 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:38:07,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432524001] [2023-11-06 22:38:07,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432524001] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:38:07,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:38:07,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:38:07,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969821426] [2023-11-06 22:38:07,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:38:07,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:38:07,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:38:07,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:38:07,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:38:07,783 INFO L87 Difference]: Start difference. First operand 2317 states and 3996 transitions. Second operand has 3 states, 3 states have (on average 59.0) internal successors, (177), 2 states have internal predecessors, (177), 1 states have call successors, (123), 1 states have call predecessors, (123), 1 states have return successors, (123), 1 states have call predecessors, (123), 1 states have call successors, (123) [2023-11-06 22:38:08,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:38:08,033 INFO L93 Difference]: Finished difference Result 5797 states and 10008 transitions. [2023-11-06 22:38:08,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:38:08,034 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.0) internal successors, (177), 2 states have internal predecessors, (177), 1 states have call successors, (123), 1 states have call predecessors, (123), 1 states have return successors, (123), 1 states have call predecessors, (123), 1 states have call successors, (123) Word has length 789 [2023-11-06 22:38:08,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:38:08,066 INFO L225 Difference]: With dead ends: 5797 [2023-11-06 22:38:08,066 INFO L226 Difference]: Without dead ends: 3483 [2023-11-06 22:38:08,076 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 788 GetRequests, 787 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 22:38:08,077 INFO L413 NwaCegarLoop]: 699 mSDtfsCounter, 351 mSDsluCounter, 689 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 1388 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:38:08,078 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [351 Valid, 1388 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:38:08,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3483 states. [2023-11-06 22:38:08,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3483 to 3481. [2023-11-06 22:38:08,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3481 states, 2562 states have (on average 1.633879781420765) internal successors, (4186), 2568 states have internal predecessors, (4186), 906 states have call successors, (906), 12 states have call predecessors, (906), 12 states have return successors, (906), 900 states have call predecessors, (906), 906 states have call successors, (906) [2023-11-06 22:38:08,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3481 states to 3481 states and 5998 transitions. [2023-11-06 22:38:08,616 INFO L78 Accepts]: Start accepts. Automaton has 3481 states and 5998 transitions. Word has length 789 [2023-11-06 22:38:08,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:38:08,617 INFO L495 AbstractCegarLoop]: Abstraction has 3481 states and 5998 transitions. [2023-11-06 22:38:08,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.0) internal successors, (177), 2 states have internal predecessors, (177), 1 states have call successors, (123), 1 states have call predecessors, (123), 1 states have return successors, (123), 1 states have call predecessors, (123), 1 states have call successors, (123) [2023-11-06 22:38:08,618 INFO L276 IsEmpty]: Start isEmpty. Operand 3481 states and 5998 transitions. [2023-11-06 22:38:08,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 791 [2023-11-06 22:38:08,630 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:38:08,630 INFO L195 NwaCegarLoop]: trace histogram [123, 123, 123, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:38:08,644 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec3c8fe-a195-4138-ad00-fb03fee8dd4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 22:38:08,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec3c8fe-a195-4138-ad00-fb03fee8dd4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:38:08,840 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:38:08,840 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:38:08,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1220965687, now seen corresponding path program 1 times [2023-11-06 22:38:08,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:38:08,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997087491] [2023-11-06 22:38:08,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:38:08,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:38:08,961 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:38:08,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [699862840] [2023-11-06 22:38:08,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:38:08,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:38:08,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec3c8fe-a195-4138-ad00-fb03fee8dd4b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:38:08,963 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec3c8fe-a195-4138-ad00-fb03fee8dd4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:38:08,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec3c8fe-a195-4138-ad00-fb03fee8dd4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 22:38:09,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:38:09,636 INFO L262 TraceCheckSpWp]: Trace formula consists of 1864 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 22:38:09,650 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:38:09,706 INFO L134 CoverageAnalysis]: Checked inductivity of 30012 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30012 trivial. 0 not checked. [2023-11-06 22:38:09,706 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:38:09,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:38:09,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997087491] [2023-11-06 22:38:09,707 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:38:09,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699862840] [2023-11-06 22:38:09,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699862840] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:38:09,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:38:09,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:38:09,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110555286] [2023-11-06 22:38:09,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:38:09,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:38:09,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:38:09,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:38:09,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:38:09,711 INFO L87 Difference]: Start difference. First operand 3481 states and 5998 transitions. Second operand has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 3 states have internal predecessors, (178), 1 states have call successors, (123), 1 states have call predecessors, (123), 1 states have return successors, (123), 1 states have call predecessors, (123), 1 states have call successors, (123) [2023-11-06 22:38:09,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:38:09,992 INFO L93 Difference]: Finished difference Result 9053 states and 15596 transitions. [2023-11-06 22:38:09,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:38:09,996 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 3 states have internal predecessors, (178), 1 states have call successors, (123), 1 states have call predecessors, (123), 1 states have return successors, (123), 1 states have call predecessors, (123), 1 states have call successors, (123) Word has length 790 [2023-11-06 22:38:09,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:38:10,038 INFO L225 Difference]: With dead ends: 9053 [2023-11-06 22:38:10,038 INFO L226 Difference]: Without dead ends: 5575 [2023-11-06 22:38:10,050 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 789 GetRequests, 788 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 22:38:10,051 INFO L413 NwaCegarLoop]: 700 mSDtfsCounter, 319 mSDsluCounter, 688 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 1388 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:38:10,051 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [319 Valid, 1388 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:38:10,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5575 states. [2023-11-06 22:38:10,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5575 to 5567. [2023-11-06 22:38:10,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5567 states, 4288 states have (on average 1.6441231343283582) internal successors, (7050), 4306 states have internal predecessors, (7050), 1254 states have call successors, (1254), 24 states have call predecessors, (1254), 24 states have return successors, (1254), 1236 states have call predecessors, (1254), 1254 states have call successors, (1254) [2023-11-06 22:38:10,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5567 states to 5567 states and 9558 transitions. [2023-11-06 22:38:10,803 INFO L78 Accepts]: Start accepts. Automaton has 5567 states and 9558 transitions. Word has length 790 [2023-11-06 22:38:10,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:38:10,805 INFO L495 AbstractCegarLoop]: Abstraction has 5567 states and 9558 transitions. [2023-11-06 22:38:10,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 3 states have internal predecessors, (178), 1 states have call successors, (123), 1 states have call predecessors, (123), 1 states have return successors, (123), 1 states have call predecessors, (123), 1 states have call successors, (123) [2023-11-06 22:38:10,806 INFO L276 IsEmpty]: Start isEmpty. Operand 5567 states and 9558 transitions. [2023-11-06 22:38:10,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 791 [2023-11-06 22:38:10,821 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:38:10,821 INFO L195 NwaCegarLoop]: trace histogram [123, 123, 123, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:38:10,836 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec3c8fe-a195-4138-ad00-fb03fee8dd4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 22:38:11,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec3c8fe-a195-4138-ad00-fb03fee8dd4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:38:11,032 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:38:11,032 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:38:11,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1600899211, now seen corresponding path program 1 times [2023-11-06 22:38:11,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:38:11,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885174891] [2023-11-06 22:38:11,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:38:11,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:38:11,132 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:38:11,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1257618588] [2023-11-06 22:38:11,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:38:11,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:38:11,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec3c8fe-a195-4138-ad00-fb03fee8dd4b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:38:11,135 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec3c8fe-a195-4138-ad00-fb03fee8dd4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:38:11,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec3c8fe-a195-4138-ad00-fb03fee8dd4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 22:38:11,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:38:11,830 INFO L262 TraceCheckSpWp]: Trace formula consists of 1863 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:38:11,845 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:38:12,903 INFO L134 CoverageAnalysis]: Checked inductivity of 30012 backedges. 10706 proven. 282 refuted. 0 times theorem prover too weak. 19024 trivial. 0 not checked. [2023-11-06 22:38:12,904 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:38:13,593 INFO L134 CoverageAnalysis]: Checked inductivity of 30012 backedges. 84 proven. 282 refuted. 0 times theorem prover too weak. 29646 trivial. 0 not checked. [2023-11-06 22:38:13,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:38:13,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885174891] [2023-11-06 22:38:13,594 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:38:13,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257618588] [2023-11-06 22:38:13,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257618588] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:38:13,594 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:38:13,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-06 22:38:13,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327487954] [2023-11-06 22:38:13,595 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:38:13,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:38:13,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:38:13,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:38:13,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:38:13,599 INFO L87 Difference]: Start difference. First operand 5567 states and 9558 transitions. Second operand has 7 states, 7 states have (on average 26.714285714285715) internal successors, (187), 7 states have internal predecessors, (187), 2 states have call successors, (217), 2 states have call predecessors, (217), 4 states have return successors, (218), 2 states have call predecessors, (218), 2 states have call successors, (218) [2023-11-06 22:38:14,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:38:14,689 INFO L93 Difference]: Finished difference Result 9164 states and 15684 transitions. [2023-11-06 22:38:14,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 22:38:14,690 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 26.714285714285715) internal successors, (187), 7 states have internal predecessors, (187), 2 states have call successors, (217), 2 states have call predecessors, (217), 4 states have return successors, (218), 2 states have call predecessors, (218), 2 states have call successors, (218) Word has length 790 [2023-11-06 22:38:14,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:38:14,720 INFO L225 Difference]: With dead ends: 9164 [2023-11-06 22:38:14,721 INFO L226 Difference]: Without dead ends: 3600 [2023-11-06 22:38:14,736 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1582 GetRequests, 1572 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-06 22:38:14,737 INFO L413 NwaCegarLoop]: 613 mSDtfsCounter, 1124 mSDsluCounter, 895 mSDsCounter, 0 mSdLazyCounter, 727 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1152 SdHoareTripleChecker+Valid, 1508 SdHoareTripleChecker+Invalid, 860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 727 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-06 22:38:14,737 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1152 Valid, 1508 Invalid, 860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 727 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-06 22:38:14,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3600 states. [2023-11-06 22:38:15,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3600 to 3573. [2023-11-06 22:38:15,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3573 states, 2601 states have (on average 1.6032295271049597) internal successors, (4170), 2608 states have internal predecessors, (4170), 946 states have call successors, (946), 25 states have call predecessors, (946), 25 states have return successors, (946), 939 states have call predecessors, (946), 946 states have call successors, (946) [2023-11-06 22:38:15,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3573 states to 3573 states and 6062 transitions. [2023-11-06 22:38:15,378 INFO L78 Accepts]: Start accepts. Automaton has 3573 states and 6062 transitions. Word has length 790 [2023-11-06 22:38:15,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:38:15,379 INFO L495 AbstractCegarLoop]: Abstraction has 3573 states and 6062 transitions. [2023-11-06 22:38:15,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 26.714285714285715) internal successors, (187), 7 states have internal predecessors, (187), 2 states have call successors, (217), 2 states have call predecessors, (217), 4 states have return successors, (218), 2 states have call predecessors, (218), 2 states have call successors, (218) [2023-11-06 22:38:15,380 INFO L276 IsEmpty]: Start isEmpty. Operand 3573 states and 6062 transitions. [2023-11-06 22:38:15,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 796 [2023-11-06 22:38:15,392 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:38:15,392 INFO L195 NwaCegarLoop]: trace histogram [123, 123, 123, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:38:15,406 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec3c8fe-a195-4138-ad00-fb03fee8dd4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 22:38:15,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec3c8fe-a195-4138-ad00-fb03fee8dd4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:38:15,607 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:38:15,607 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:38:15,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1344475111, now seen corresponding path program 1 times [2023-11-06 22:38:15,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:38:15,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814552296] [2023-11-06 22:38:15,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:38:15,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:38:15,711 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:38:15,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1611849219] [2023-11-06 22:38:15,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:38:15,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:38:15,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec3c8fe-a195-4138-ad00-fb03fee8dd4b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:38:15,713 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec3c8fe-a195-4138-ad00-fb03fee8dd4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:38:15,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec3c8fe-a195-4138-ad00-fb03fee8dd4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 22:38:16,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:38:16,431 INFO L262 TraceCheckSpWp]: Trace formula consists of 1881 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:38:16,446 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:38:17,004 INFO L134 CoverageAnalysis]: Checked inductivity of 30012 backedges. 14748 proven. 153 refuted. 0 times theorem prover too weak. 15111 trivial. 0 not checked. [2023-11-06 22:38:17,005 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:38:17,498 INFO L134 CoverageAnalysis]: Checked inductivity of 30012 backedges. 213 proven. 153 refuted. 0 times theorem prover too weak. 29646 trivial. 0 not checked. [2023-11-06 22:38:17,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:38:17,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814552296] [2023-11-06 22:38:17,499 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:38:17,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611849219] [2023-11-06 22:38:17,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611849219] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:38:17,500 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:38:17,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-11-06 22:38:17,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998290095] [2023-11-06 22:38:17,503 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:38:17,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 22:38:17,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:38:17,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 22:38:17,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:38:17,508 INFO L87 Difference]: Start difference. First operand 3573 states and 6062 transitions. Second operand has 8 states, 8 states have (on average 32.5) internal successors, (260), 8 states have internal predecessors, (260), 3 states have call successors, (174), 2 states have call predecessors, (174), 4 states have return successors, (175), 3 states have call predecessors, (175), 3 states have call successors, (175) [2023-11-06 22:38:18,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:38:18,448 INFO L93 Difference]: Finished difference Result 7143 states and 12088 transitions. [2023-11-06 22:38:18,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 22:38:18,448 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 32.5) internal successors, (260), 8 states have internal predecessors, (260), 3 states have call successors, (174), 2 states have call predecessors, (174), 4 states have return successors, (175), 3 states have call predecessors, (175), 3 states have call successors, (175) Word has length 795 [2023-11-06 22:38:18,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:38:18,487 INFO L225 Difference]: With dead ends: 7143 [2023-11-06 22:38:18,487 INFO L226 Difference]: Without dead ends: 3623 [2023-11-06 22:38:18,500 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1592 GetRequests, 1582 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:38:18,502 INFO L413 NwaCegarLoop]: 567 mSDtfsCounter, 455 mSDsluCounter, 886 mSDsCounter, 0 mSdLazyCounter, 627 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 526 SdHoareTripleChecker+Valid, 1453 SdHoareTripleChecker+Invalid, 647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 627 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-06 22:38:18,503 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [526 Valid, 1453 Invalid, 647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 627 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-06 22:38:18,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3623 states. [2023-11-06 22:38:19,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3623 to 3597. [2023-11-06 22:38:19,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3597 states, 2619 states have (on average 1.5899198167239403) internal successors, (4164), 2626 states have internal predecessors, (4164), 946 states have call successors, (946), 31 states have call predecessors, (946), 31 states have return successors, (946), 939 states have call predecessors, (946), 946 states have call successors, (946) [2023-11-06 22:38:19,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3597 states to 3597 states and 6056 transitions. [2023-11-06 22:38:19,251 INFO L78 Accepts]: Start accepts. Automaton has 3597 states and 6056 transitions. Word has length 795 [2023-11-06 22:38:19,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:38:19,253 INFO L495 AbstractCegarLoop]: Abstraction has 3597 states and 6056 transitions. [2023-11-06 22:38:19,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 32.5) internal successors, (260), 8 states have internal predecessors, (260), 3 states have call successors, (174), 2 states have call predecessors, (174), 4 states have return successors, (175), 3 states have call predecessors, (175), 3 states have call successors, (175) [2023-11-06 22:38:19,254 INFO L276 IsEmpty]: Start isEmpty. Operand 3597 states and 6056 transitions. [2023-11-06 22:38:19,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 798 [2023-11-06 22:38:19,272 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:38:19,273 INFO L195 NwaCegarLoop]: trace histogram [123, 123, 123, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:38:19,288 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec3c8fe-a195-4138-ad00-fb03fee8dd4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-06 22:38:19,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec3c8fe-a195-4138-ad00-fb03fee8dd4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:38:19,483 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:38:19,484 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:38:19,484 INFO L85 PathProgramCache]: Analyzing trace with hash -2121602175, now seen corresponding path program 1 times [2023-11-06 22:38:19,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:38:19,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327998770] [2023-11-06 22:38:19,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:38:19,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:38:19,623 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:38:19,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [988935030] [2023-11-06 22:38:19,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:38:19,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:38:19,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec3c8fe-a195-4138-ad00-fb03fee8dd4b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:38:19,626 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec3c8fe-a195-4138-ad00-fb03fee8dd4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:38:19,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec3c8fe-a195-4138-ad00-fb03fee8dd4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 22:38:20,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:38:20,387 INFO L262 TraceCheckSpWp]: Trace formula consists of 1885 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:38:20,401 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:38:20,879 INFO L134 CoverageAnalysis]: Checked inductivity of 30012 backedges. 12476 proven. 105 refuted. 0 times theorem prover too weak. 17431 trivial. 0 not checked. [2023-11-06 22:38:20,879 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:38:21,434 INFO L134 CoverageAnalysis]: Checked inductivity of 30012 backedges. 261 proven. 105 refuted. 0 times theorem prover too weak. 29646 trivial. 0 not checked. [2023-11-06 22:38:21,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:38:21,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327998770] [2023-11-06 22:38:21,435 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:38:21,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988935030] [2023-11-06 22:38:21,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988935030] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:38:21,435 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:38:21,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-06 22:38:21,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351915266] [2023-11-06 22:38:21,436 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:38:21,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:38:21,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:38:21,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:38:21,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:38:21,440 INFO L87 Difference]: Start difference. First operand 3597 states and 6056 transitions. Second operand has 7 states, 7 states have (on average 27.714285714285715) internal successors, (194), 7 states have internal predecessors, (194), 2 states have call successors, (158), 2 states have call predecessors, (158), 4 states have return successors, (159), 2 states have call predecessors, (159), 2 states have call successors, (159) [2023-11-06 22:38:22,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:38:22,399 INFO L93 Difference]: Finished difference Result 7203 states and 12088 transitions. [2023-11-06 22:38:22,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 22:38:22,400 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 27.714285714285715) internal successors, (194), 7 states have internal predecessors, (194), 2 states have call successors, (158), 2 states have call predecessors, (158), 4 states have return successors, (159), 2 states have call predecessors, (159), 2 states have call successors, (159) Word has length 797 [2023-11-06 22:38:22,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:38:22,423 INFO L225 Difference]: With dead ends: 7203 [2023-11-06 22:38:22,423 INFO L226 Difference]: Without dead ends: 3659 [2023-11-06 22:38:22,436 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1596 GetRequests, 1586 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-06 22:38:22,437 INFO L413 NwaCegarLoop]: 562 mSDtfsCounter, 442 mSDsluCounter, 876 mSDsCounter, 0 mSdLazyCounter, 631 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 528 SdHoareTripleChecker+Valid, 1438 SdHoareTripleChecker+Invalid, 653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-06 22:38:22,438 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [528 Valid, 1438 Invalid, 653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 631 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-06 22:38:22,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3659 states. [2023-11-06 22:38:23,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3659 to 3621. [2023-11-06 22:38:23,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3621 states, 2637 states have (on average 1.5676905574516495) internal successors, (4134), 2644 states have internal predecessors, (4134), 946 states have call successors, (946), 37 states have call predecessors, (946), 37 states have return successors, (946), 939 states have call predecessors, (946), 946 states have call successors, (946) [2023-11-06 22:38:23,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3621 states to 3621 states and 6026 transitions. [2023-11-06 22:38:23,081 INFO L78 Accepts]: Start accepts. Automaton has 3621 states and 6026 transitions. Word has length 797 [2023-11-06 22:38:23,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:38:23,082 INFO L495 AbstractCegarLoop]: Abstraction has 3621 states and 6026 transitions. [2023-11-06 22:38:23,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 27.714285714285715) internal successors, (194), 7 states have internal predecessors, (194), 2 states have call successors, (158), 2 states have call predecessors, (158), 4 states have return successors, (159), 2 states have call predecessors, (159), 2 states have call successors, (159) [2023-11-06 22:38:23,083 INFO L276 IsEmpty]: Start isEmpty. Operand 3621 states and 6026 transitions. [2023-11-06 22:38:23,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 798 [2023-11-06 22:38:23,094 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:38:23,095 INFO L195 NwaCegarLoop]: trace histogram [123, 123, 123, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:38:23,105 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec3c8fe-a195-4138-ad00-fb03fee8dd4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-06 22:38:23,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec3c8fe-a195-4138-ad00-fb03fee8dd4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:38:23,305 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:38:23,306 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:38:23,306 INFO L85 PathProgramCache]: Analyzing trace with hash -1256821437, now seen corresponding path program 1 times [2023-11-06 22:38:23,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:38:23,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750384235] [2023-11-06 22:38:23,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:38:23,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:38:23,447 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:38:23,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1904555120] [2023-11-06 22:38:23,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:38:23,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:38:23,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec3c8fe-a195-4138-ad00-fb03fee8dd4b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:38:23,450 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec3c8fe-a195-4138-ad00-fb03fee8dd4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:38:23,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec3c8fe-a195-4138-ad00-fb03fee8dd4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-06 22:38:24,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:38:24,275 INFO L262 TraceCheckSpWp]: Trace formula consists of 1884 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 22:38:24,290 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:38:25,293 INFO L134 CoverageAnalysis]: Checked inductivity of 30012 backedges. 6572 proven. 321 refuted. 0 times theorem prover too weak. 23119 trivial. 0 not checked. [2023-11-06 22:38:25,293 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:38:26,019 INFO L134 CoverageAnalysis]: Checked inductivity of 30012 backedges. 45 proven. 321 refuted. 0 times theorem prover too weak. 29646 trivial. 0 not checked. [2023-11-06 22:38:26,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:38:26,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750384235] [2023-11-06 22:38:26,019 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:38:26,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904555120] [2023-11-06 22:38:26,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904555120] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:38:26,020 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:38:26,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-11-06 22:38:26,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712593233] [2023-11-06 22:38:26,021 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:38:26,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 22:38:26,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:38:26,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 22:38:26,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-11-06 22:38:26,026 INFO L87 Difference]: Start difference. First operand 3621 states and 6026 transitions. Second operand has 10 states, 10 states have (on average 34.5) internal successors, (345), 10 states have internal predecessors, (345), 3 states have call successors, (230), 2 states have call predecessors, (230), 4 states have return successors, (231), 3 states have call predecessors, (231), 3 states have call successors, (231) [2023-11-06 22:38:28,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:38:28,398 INFO L93 Difference]: Finished difference Result 8755 states and 14614 transitions. [2023-11-06 22:38:28,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-06 22:38:28,399 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 34.5) internal successors, (345), 10 states have internal predecessors, (345), 3 states have call successors, (230), 2 states have call predecessors, (230), 4 states have return successors, (231), 3 states have call predecessors, (231), 3 states have call successors, (231) Word has length 797 [2023-11-06 22:38:28,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:38:28,419 INFO L225 Difference]: With dead ends: 8755 [2023-11-06 22:38:28,419 INFO L226 Difference]: Without dead ends: 5187 [2023-11-06 22:38:28,429 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1606 GetRequests, 1586 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=154, Invalid=308, Unknown=0, NotChecked=0, Total=462 [2023-11-06 22:38:28,430 INFO L413 NwaCegarLoop]: 1055 mSDtfsCounter, 1699 mSDsluCounter, 2005 mSDsCounter, 0 mSdLazyCounter, 1525 mSolverCounterSat, 607 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1701 SdHoareTripleChecker+Valid, 3060 SdHoareTripleChecker+Invalid, 2132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 607 IncrementalHoareTripleChecker+Valid, 1525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-11-06 22:38:28,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1701 Valid, 3060 Invalid, 2132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [607 Valid, 1525 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-11-06 22:38:28,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5187 states. [2023-11-06 22:38:29,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5187 to 3844. [2023-11-06 22:38:29,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3844 states, 2747 states have (on average 1.5100109210047323) internal successors, (4148), 2754 states have internal predecessors, (4148), 1041 states have call successors, (1041), 55 states have call predecessors, (1041), 55 states have return successors, (1041), 1034 states have call predecessors, (1041), 1041 states have call successors, (1041) [2023-11-06 22:38:29,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3844 states to 3844 states and 6230 transitions. [2023-11-06 22:38:29,503 INFO L78 Accepts]: Start accepts. Automaton has 3844 states and 6230 transitions. Word has length 797 [2023-11-06 22:38:29,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:38:29,504 INFO L495 AbstractCegarLoop]: Abstraction has 3844 states and 6230 transitions. [2023-11-06 22:38:29,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 34.5) internal successors, (345), 10 states have internal predecessors, (345), 3 states have call successors, (230), 2 states have call predecessors, (230), 4 states have return successors, (231), 3 states have call predecessors, (231), 3 states have call successors, (231) [2023-11-06 22:38:29,505 INFO L276 IsEmpty]: Start isEmpty. Operand 3844 states and 6230 transitions. [2023-11-06 22:38:29,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 799 [2023-11-06 22:38:29,517 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:38:29,517 INFO L195 NwaCegarLoop]: trace histogram [123, 123, 123, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:38:29,528 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec3c8fe-a195-4138-ad00-fb03fee8dd4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-06 22:38:29,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec3c8fe-a195-4138-ad00-fb03fee8dd4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-06 22:38:29,732 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:38:29,732 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:38:29,733 INFO L85 PathProgramCache]: Analyzing trace with hash -891777774, now seen corresponding path program 1 times [2023-11-06 22:38:29,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:38:29,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470700434] [2023-11-06 22:38:29,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:38:29,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:38:29,836 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:38:29,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [803287127] [2023-11-06 22:38:29,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:38:29,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:38:29,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec3c8fe-a195-4138-ad00-fb03fee8dd4b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:38:29,838 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec3c8fe-a195-4138-ad00-fb03fee8dd4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:38:29,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec3c8fe-a195-4138-ad00-fb03fee8dd4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-06 22:38:30,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:38:30,744 INFO L262 TraceCheckSpWp]: Trace formula consists of 1885 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 22:38:30,756 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:38:30,841 INFO L134 CoverageAnalysis]: Checked inductivity of 30012 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30012 trivial. 0 not checked. [2023-11-06 22:38:30,842 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:38:30,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:38:30,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470700434] [2023-11-06 22:38:30,842 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:38:30,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803287127] [2023-11-06 22:38:30,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803287127] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:38:30,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:38:30,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:38:30,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175789388] [2023-11-06 22:38:30,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:38:30,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:38:30,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:38:30,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:38:30,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:38:30,847 INFO L87 Difference]: Start difference. First operand 3844 states and 6230 transitions. Second operand has 4 states, 4 states have (on average 46.5) internal successors, (186), 4 states have internal predecessors, (186), 1 states have call successors, (123), 1 states have call predecessors, (123), 1 states have return successors, (123), 1 states have call predecessors, (123), 1 states have call successors, (123) [2023-11-06 22:38:31,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:38:31,622 INFO L93 Difference]: Finished difference Result 10330 states and 16776 transitions. [2023-11-06 22:38:31,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:38:31,623 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 46.5) internal successors, (186), 4 states have internal predecessors, (186), 1 states have call successors, (123), 1 states have call predecessors, (123), 1 states have return successors, (123), 1 states have call predecessors, (123), 1 states have call successors, (123) Word has length 798 [2023-11-06 22:38:31,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:38:31,648 INFO L225 Difference]: With dead ends: 10330 [2023-11-06 22:38:31,649 INFO L226 Difference]: Without dead ends: 6714 [2023-11-06 22:38:31,660 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 799 GetRequests, 796 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 22:38:31,661 INFO L413 NwaCegarLoop]: 1247 mSDtfsCounter, 1119 mSDsluCounter, 1627 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1119 SdHoareTripleChecker+Valid, 2874 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:38:31,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1119 Valid, 2874 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:38:31,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6714 states. [2023-11-06 22:38:32,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6714 to 5605. [2023-11-06 22:38:32,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5605 states, 3846 states have (on average 1.4625585023400935) internal successors, (5625), 3858 states have internal predecessors, (5625), 1656 states have call successors, (1656), 102 states have call predecessors, (1656), 102 states have return successors, (1656), 1644 states have call predecessors, (1656), 1656 states have call successors, (1656) [2023-11-06 22:38:32,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5605 states to 5605 states and 8937 transitions. [2023-11-06 22:38:32,876 INFO L78 Accepts]: Start accepts. Automaton has 5605 states and 8937 transitions. Word has length 798 [2023-11-06 22:38:32,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:38:32,878 INFO L495 AbstractCegarLoop]: Abstraction has 5605 states and 8937 transitions. [2023-11-06 22:38:32,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 46.5) internal successors, (186), 4 states have internal predecessors, (186), 1 states have call successors, (123), 1 states have call predecessors, (123), 1 states have return successors, (123), 1 states have call predecessors, (123), 1 states have call successors, (123) [2023-11-06 22:38:32,879 INFO L276 IsEmpty]: Start isEmpty. Operand 5605 states and 8937 transitions. [2023-11-06 22:38:32,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 799 [2023-11-06 22:38:32,891 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:38:32,892 INFO L195 NwaCegarLoop]: trace histogram [123, 123, 123, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:38:32,909 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec3c8fe-a195-4138-ad00-fb03fee8dd4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-06 22:38:33,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec3c8fe-a195-4138-ad00-fb03fee8dd4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-06 22:38:33,110 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:38:33,110 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:38:33,110 INFO L85 PathProgramCache]: Analyzing trace with hash -232246252, now seen corresponding path program 1 times [2023-11-06 22:38:33,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:38:33,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379002272] [2023-11-06 22:38:33,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:38:33,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:38:33,207 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:38:33,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1284439152] [2023-11-06 22:38:33,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:38:33,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:38:33,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec3c8fe-a195-4138-ad00-fb03fee8dd4b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:38:33,209 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec3c8fe-a195-4138-ad00-fb03fee8dd4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:38:33,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec3c8fe-a195-4138-ad00-fb03fee8dd4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-06 22:38:34,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:38:34,290 INFO L262 TraceCheckSpWp]: Trace formula consists of 1884 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 22:38:34,306 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:38:35,367 INFO L134 CoverageAnalysis]: Checked inductivity of 30012 backedges. 6572 proven. 321 refuted. 0 times theorem prover too weak. 23119 trivial. 0 not checked. [2023-11-06 22:38:35,367 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:38:36,127 INFO L134 CoverageAnalysis]: Checked inductivity of 30012 backedges. 45 proven. 321 refuted. 0 times theorem prover too weak. 29646 trivial. 0 not checked. [2023-11-06 22:38:36,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:38:36,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379002272] [2023-11-06 22:38:36,127 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:38:36,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284439152] [2023-11-06 22:38:36,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284439152] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:38:36,128 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:38:36,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-11-06 22:38:36,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377166715] [2023-11-06 22:38:36,129 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:38:36,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 22:38:36,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:38:36,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 22:38:36,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:38:36,133 INFO L87 Difference]: Start difference. First operand 5605 states and 8937 transitions. Second operand has 12 states, 12 states have (on average 29.0) internal successors, (348), 12 states have internal predecessors, (348), 3 states have call successors, (230), 2 states have call predecessors, (230), 4 states have return successors, (231), 3 states have call predecessors, (231), 3 states have call successors, (231) [2023-11-06 22:38:39,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:38:39,429 INFO L93 Difference]: Finished difference Result 13237 states and 21328 transitions. [2023-11-06 22:38:39,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-06 22:38:39,430 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 29.0) internal successors, (348), 12 states have internal predecessors, (348), 3 states have call successors, (230), 2 states have call predecessors, (230), 4 states have return successors, (231), 3 states have call predecessors, (231), 3 states have call successors, (231) Word has length 798 [2023-11-06 22:38:39,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:38:39,459 INFO L225 Difference]: With dead ends: 13237 [2023-11-06 22:38:39,460 INFO L226 Difference]: Without dead ends: 7635 [2023-11-06 22:38:39,475 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1606 GetRequests, 1585 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=142, Invalid=364, Unknown=0, NotChecked=0, Total=506 [2023-11-06 22:38:39,476 INFO L413 NwaCegarLoop]: 1055 mSDtfsCounter, 1747 mSDsluCounter, 3056 mSDsCounter, 0 mSdLazyCounter, 1797 mSolverCounterSat, 570 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1763 SdHoareTripleChecker+Valid, 4111 SdHoareTripleChecker+Invalid, 2367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 570 IncrementalHoareTripleChecker+Valid, 1797 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-11-06 22:38:39,476 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1763 Valid, 4111 Invalid, 2367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [570 Valid, 1797 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-11-06 22:38:39,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7635 states. [2023-11-06 22:38:40,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7635 to 5605. [2023-11-06 22:38:40,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5605 states, 3846 states have (on average 1.4578783151326054) internal successors, (5607), 3858 states have internal predecessors, (5607), 1656 states have call successors, (1656), 102 states have call predecessors, (1656), 102 states have return successors, (1656), 1644 states have call predecessors, (1656), 1656 states have call successors, (1656) [2023-11-06 22:38:40,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5605 states to 5605 states and 8919 transitions. [2023-11-06 22:38:40,700 INFO L78 Accepts]: Start accepts. Automaton has 5605 states and 8919 transitions. Word has length 798 [2023-11-06 22:38:40,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:38:40,703 INFO L495 AbstractCegarLoop]: Abstraction has 5605 states and 8919 transitions. [2023-11-06 22:38:40,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 29.0) internal successors, (348), 12 states have internal predecessors, (348), 3 states have call successors, (230), 2 states have call predecessors, (230), 4 states have return successors, (231), 3 states have call predecessors, (231), 3 states have call successors, (231) [2023-11-06 22:38:40,704 INFO L276 IsEmpty]: Start isEmpty. Operand 5605 states and 8919 transitions. [2023-11-06 22:38:40,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 802 [2023-11-06 22:38:40,716 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:38:40,716 INFO L195 NwaCegarLoop]: trace histogram [123, 123, 123, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:38:40,732 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec3c8fe-a195-4138-ad00-fb03fee8dd4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-06 22:38:40,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec3c8fe-a195-4138-ad00-fb03fee8dd4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:38:40,928 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:38:40,928 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:38:40,929 INFO L85 PathProgramCache]: Analyzing trace with hash 583830338, now seen corresponding path program 1 times [2023-11-06 22:38:40,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:38:40,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903090863] [2023-11-06 22:38:40,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:38:40,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:38:41,032 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:38:41,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [776205626] [2023-11-06 22:38:41,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:38:41,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:38:41,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec3c8fe-a195-4138-ad00-fb03fee8dd4b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:38:41,034 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec3c8fe-a195-4138-ad00-fb03fee8dd4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:38:41,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec3c8fe-a195-4138-ad00-fb03fee8dd4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-06 22:38:41,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:38:42,006 INFO L262 TraceCheckSpWp]: Trace formula consists of 1889 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 22:38:42,019 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:38:45,115 INFO L134 CoverageAnalysis]: Checked inductivity of 30012 backedges. 14960 proven. 0 refuted. 0 times theorem prover too weak. 15052 trivial. 0 not checked. [2023-11-06 22:38:45,115 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:38:45,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:38:45,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903090863] [2023-11-06 22:38:45,116 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:38:45,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776205626] [2023-11-06 22:38:45,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776205626] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:38:45,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:38:45,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 22:38:45,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459862316] [2023-11-06 22:38:45,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:38:45,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:38:45,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:38:45,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:38:45,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:38:45,120 INFO L87 Difference]: Start difference. First operand 5605 states and 8919 transitions. Second operand has 6 states, 6 states have (on average 32.0) internal successors, (192), 5 states have internal predecessors, (192), 2 states have call successors, (123), 2 states have call predecessors, (123), 2 states have return successors, (123), 2 states have call predecessors, (123), 2 states have call successors, (123) [2023-11-06 22:38:48,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:38:48,311 INFO L93 Difference]: Finished difference Result 15376 states and 24417 transitions. [2023-11-06 22:38:48,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:38:48,311 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 32.0) internal successors, (192), 5 states have internal predecessors, (192), 2 states have call successors, (123), 2 states have call predecessors, (123), 2 states have return successors, (123), 2 states have call predecessors, (123), 2 states have call successors, (123) Word has length 801 [2023-11-06 22:38:48,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:38:48,344 INFO L225 Difference]: With dead ends: 15376 [2023-11-06 22:38:48,344 INFO L226 Difference]: Without dead ends: 9774 [2023-11-06 22:38:48,358 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 802 GetRequests, 796 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:38:48,359 INFO L413 NwaCegarLoop]: 819 mSDtfsCounter, 2847 mSDsluCounter, 1487 mSDsCounter, 0 mSdLazyCounter, 588 mSolverCounterSat, 363 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2847 SdHoareTripleChecker+Valid, 2306 SdHoareTripleChecker+Invalid, 951 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 363 IncrementalHoareTripleChecker+Valid, 588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-11-06 22:38:48,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2847 Valid, 2306 Invalid, 951 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [363 Valid, 588 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-11-06 22:38:48,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9774 states. [2023-11-06 22:38:50,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9774 to 7724. [2023-11-06 22:38:50,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7724 states, 5464 states have (on average 1.4701683748169838) internal successors, (8033), 5485 states have internal predecessors, (8033), 2118 states have call successors, (2118), 141 states have call predecessors, (2118), 141 states have return successors, (2118), 2097 states have call predecessors, (2118), 2118 states have call successors, (2118) [2023-11-06 22:38:50,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7724 states to 7724 states and 12269 transitions. [2023-11-06 22:38:50,301 INFO L78 Accepts]: Start accepts. Automaton has 7724 states and 12269 transitions. Word has length 801 [2023-11-06 22:38:50,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:38:50,302 INFO L495 AbstractCegarLoop]: Abstraction has 7724 states and 12269 transitions. [2023-11-06 22:38:50,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 32.0) internal successors, (192), 5 states have internal predecessors, (192), 2 states have call successors, (123), 2 states have call predecessors, (123), 2 states have return successors, (123), 2 states have call predecessors, (123), 2 states have call successors, (123) [2023-11-06 22:38:50,303 INFO L276 IsEmpty]: Start isEmpty. Operand 7724 states and 12269 transitions. [2023-11-06 22:38:50,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 802 [2023-11-06 22:38:50,316 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:38:50,317 INFO L195 NwaCegarLoop]: trace histogram [123, 123, 123, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:38:50,328 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec3c8fe-a195-4138-ad00-fb03fee8dd4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-06 22:38:50,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec3c8fe-a195-4138-ad00-fb03fee8dd4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:38:50,528 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:38:50,528 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:38:50,529 INFO L85 PathProgramCache]: Analyzing trace with hash -2445884, now seen corresponding path program 1 times [2023-11-06 22:38:50,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:38:50,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404882914] [2023-11-06 22:38:50,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:38:50,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:38:50,622 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:38:50,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1414199523] [2023-11-06 22:38:50,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:38:50,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:38:50,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec3c8fe-a195-4138-ad00-fb03fee8dd4b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:38:50,624 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec3c8fe-a195-4138-ad00-fb03fee8dd4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:38:50,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec3c8fe-a195-4138-ad00-fb03fee8dd4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-06 22:38:51,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:38:51,730 INFO L262 TraceCheckSpWp]: Trace formula consists of 1889 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-06 22:38:51,744 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:38:54,607 INFO L134 CoverageAnalysis]: Checked inductivity of 30012 backedges. 15844 proven. 282 refuted. 0 times theorem prover too weak. 13886 trivial. 0 not checked. [2023-11-06 22:38:54,607 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:39:02,194 INFO L134 CoverageAnalysis]: Checked inductivity of 30012 backedges. 798 proven. 291 refuted. 0 times theorem prover too weak. 28923 trivial. 0 not checked. [2023-11-06 22:39:02,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:39:02,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404882914] [2023-11-06 22:39:02,195 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:39:02,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414199523] [2023-11-06 22:39:02,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414199523] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:39:02,196 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:39:02,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 26 [2023-11-06 22:39:02,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993138299] [2023-11-06 22:39:02,197 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:39:02,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-06 22:39:02,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:39:02,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-06 22:39:02,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=477, Unknown=0, NotChecked=0, Total=650 [2023-11-06 22:39:02,202 INFO L87 Difference]: Start difference. First operand 7724 states and 12269 transitions. Second operand has 26 states, 25 states have (on average 14.08) internal successors, (352), 24 states have internal predecessors, (352), 8 states have call successors, (246), 5 states have call predecessors, (246), 10 states have return successors, (246), 8 states have call predecessors, (246), 8 states have call successors, (246) [2023-11-06 22:39:46,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:39:46,621 INFO L93 Difference]: Finished difference Result 64890 states and 101425 transitions. [2023-11-06 22:39:46,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2023-11-06 22:39:46,622 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 14.08) internal successors, (352), 24 states have internal predecessors, (352), 8 states have call successors, (246), 5 states have call predecessors, (246), 10 states have return successors, (246), 8 states have call predecessors, (246), 8 states have call successors, (246) Word has length 801 [2023-11-06 22:39:46,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:39:46,773 INFO L225 Difference]: With dead ends: 64890 [2023-11-06 22:39:46,773 INFO L226 Difference]: Without dead ends: 57169 [2023-11-06 22:39:46,803 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1668 GetRequests, 1585 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2583 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=2041, Invalid=5099, Unknown=0, NotChecked=0, Total=7140 [2023-11-06 22:39:46,804 INFO L413 NwaCegarLoop]: 889 mSDtfsCounter, 5517 mSDsluCounter, 10691 mSDsCounter, 0 mSdLazyCounter, 8927 mSolverCounterSat, 2794 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5754 SdHoareTripleChecker+Valid, 11580 SdHoareTripleChecker+Invalid, 11721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2794 IncrementalHoareTripleChecker+Valid, 8927 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.4s IncrementalHoareTripleChecker+Time [2023-11-06 22:39:46,804 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5754 Valid, 11580 Invalid, 11721 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2794 Valid, 8927 Invalid, 0 Unknown, 0 Unchecked, 24.4s Time] [2023-11-06 22:39:46,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57169 states. [2023-11-06 22:39:59,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57169 to 36825. [2023-11-06 22:39:59,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36825 states, 25448 states have (on average 1.407969192077963) internal successors, (35830), 25592 states have internal predecessors, (35830), 10528 states have call successors, (10528), 848 states have call predecessors, (10528), 848 states have return successors, (10528), 10384 states have call predecessors, (10528), 10528 states have call successors, (10528) [2023-11-06 22:39:59,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36825 states to 36825 states and 56886 transitions. [2023-11-06 22:39:59,207 INFO L78 Accepts]: Start accepts. Automaton has 36825 states and 56886 transitions. Word has length 801 [2023-11-06 22:39:59,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:39:59,208 INFO L495 AbstractCegarLoop]: Abstraction has 36825 states and 56886 transitions. [2023-11-06 22:39:59,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 14.08) internal successors, (352), 24 states have internal predecessors, (352), 8 states have call successors, (246), 5 states have call predecessors, (246), 10 states have return successors, (246), 8 states have call predecessors, (246), 8 states have call successors, (246) [2023-11-06 22:39:59,208 INFO L276 IsEmpty]: Start isEmpty. Operand 36825 states and 56886 transitions. [2023-11-06 22:39:59,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 802 [2023-11-06 22:39:59,243 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:39:59,243 INFO L195 NwaCegarLoop]: trace histogram [123, 123, 123, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:39:59,263 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec3c8fe-a195-4138-ad00-fb03fee8dd4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-06 22:39:59,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec3c8fe-a195-4138-ad00-fb03fee8dd4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-06 22:39:59,454 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:39:59,454 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:39:59,455 INFO L85 PathProgramCache]: Analyzing trace with hash -495072058, now seen corresponding path program 1 times [2023-11-06 22:39:59,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:39:59,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392588490] [2023-11-06 22:39:59,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:39:59,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:39:59,546 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:39:59,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1497240515] [2023-11-06 22:39:59,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:39:59,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:39:59,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec3c8fe-a195-4138-ad00-fb03fee8dd4b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:39:59,549 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec3c8fe-a195-4138-ad00-fb03fee8dd4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:39:59,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec3c8fe-a195-4138-ad00-fb03fee8dd4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-06 22:40:00,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:40:00,676 INFO L262 TraceCheckSpWp]: Trace formula consists of 1886 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 22:40:00,691 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:40:02,095 INFO L134 CoverageAnalysis]: Checked inductivity of 30012 backedges. 10572 proven. 81 refuted. 0 times theorem prover too weak. 19359 trivial. 0 not checked. [2023-11-06 22:40:02,095 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:40:03,396 INFO L134 CoverageAnalysis]: Checked inductivity of 30012 backedges. 285 proven. 81 refuted. 0 times theorem prover too weak. 29646 trivial. 0 not checked. [2023-11-06 22:40:03,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:40:03,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392588490] [2023-11-06 22:40:03,396 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:40:03,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497240515] [2023-11-06 22:40:03,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497240515] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:40:03,397 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:40:03,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2023-11-06 22:40:03,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088783416] [2023-11-06 22:40:03,398 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:40:03,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 22:40:03,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:40:03,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 22:40:03,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-11-06 22:40:03,402 INFO L87 Difference]: Start difference. First operand 36825 states and 56886 transitions. Second operand has 10 states, 10 states have (on average 33.7) internal successors, (337), 10 states have internal predecessors, (337), 4 states have call successors, (246), 3 states have call predecessors, (246), 5 states have return successors, (246), 4 states have call predecessors, (246), 4 states have call successors, (246) [2023-11-06 22:40:24,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:40:24,986 INFO L93 Difference]: Finished difference Result 99955 states and 155982 transitions. [2023-11-06 22:40:24,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-06 22:40:24,987 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 33.7) internal successors, (337), 10 states have internal predecessors, (337), 4 states have call successors, (246), 3 states have call predecessors, (246), 5 states have return successors, (246), 4 states have call predecessors, (246), 4 states have call successors, (246) Word has length 801 [2023-11-06 22:40:24,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:40:25,153 INFO L225 Difference]: With dead ends: 99955 [2023-11-06 22:40:25,154 INFO L226 Difference]: Without dead ends: 63133 [2023-11-06 22:40:25,230 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1604 GetRequests, 1592 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=110, Unknown=0, NotChecked=0, Total=182 [2023-11-06 22:40:25,231 INFO L413 NwaCegarLoop]: 710 mSDtfsCounter, 1975 mSDsluCounter, 2391 mSDsCounter, 0 mSdLazyCounter, 1869 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2192 SdHoareTripleChecker+Valid, 3101 SdHoareTripleChecker+Invalid, 2073 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 1869 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-11-06 22:40:25,231 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2192 Valid, 3101 Invalid, 2073 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 1869 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-11-06 22:40:25,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63133 states.