./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-54.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_89f3e463-973e-412c-b2f7-1268382b82d1/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89f3e463-973e-412c-b2f7-1268382b82d1/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_89f3e463-973e-412c-b2f7-1268382b82d1/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89f3e463-973e-412c-b2f7-1268382b82d1/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-54.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89f3e463-973e-412c-b2f7-1268382b82d1/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_89f3e463-973e-412c-b2f7-1268382b82d1/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 d8c08ca97dd545a810e8bc96a865afc430829cbfc14494ef87537262cc33351e --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:42:37,121 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:42:37,214 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89f3e463-973e-412c-b2f7-1268382b82d1/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 22:42:37,221 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:42:37,222 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:42:37,263 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:42:37,267 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:42:37,268 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:42:37,270 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:42:37,276 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:42:37,277 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:42:37,278 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:42:37,278 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:42:37,281 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:42:37,281 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 22:42:37,282 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:42:37,283 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:42:37,283 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:42:37,284 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:42:37,285 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 22:42:37,285 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:42:37,286 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 22:42:37,287 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:42:37,287 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 22:42:37,288 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:42:37,290 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:42:37,290 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:42:37,291 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:42:37,292 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:42:37,292 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:42:37,294 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:42:37,295 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 22:42:37,295 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:42:37,296 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:42:37,296 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:42:37,296 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 22:42:37,297 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:42:37,297 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:42:37,297 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:42:37,298 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_89f3e463-973e-412c-b2f7-1268382b82d1/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89f3e463-973e-412c-b2f7-1268382b82d1/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d8c08ca97dd545a810e8bc96a865afc430829cbfc14494ef87537262cc33351e [2023-11-06 22:42:37,640 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:42:37,666 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:42:37,669 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:42:37,670 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:42:37,671 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:42:37,672 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89f3e463-973e-412c-b2f7-1268382b82d1/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-54.i [2023-11-06 22:42:41,233 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:42:41,685 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:42:41,689 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89f3e463-973e-412c-b2f7-1268382b82d1/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-54.i [2023-11-06 22:42:41,717 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89f3e463-973e-412c-b2f7-1268382b82d1/bin/uautomizer-verify-WvqO1wxjHP/data/25760fd00/19f5cd93cb224737aae1ebc53602d43c/FLAGee937f807 [2023-11-06 22:42:41,737 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89f3e463-973e-412c-b2f7-1268382b82d1/bin/uautomizer-verify-WvqO1wxjHP/data/25760fd00/19f5cd93cb224737aae1ebc53602d43c [2023-11-06 22:42:41,746 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:42:41,750 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:42:41,757 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:42:41,757 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:42:41,766 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:42:41,767 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:42:41" (1/1) ... [2023-11-06 22:42:41,768 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@365ef732 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:41, skipping insertion in model container [2023-11-06 22:42:41,768 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:42:41" (1/1) ... [2023-11-06 22:42:41,845 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:42:42,056 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_89f3e463-973e-412c-b2f7-1268382b82d1/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-54.i[916,929] [2023-11-06 22:42:42,326 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:42:42,350 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:42:42,364 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_89f3e463-973e-412c-b2f7-1268382b82d1/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-54.i[916,929] [2023-11-06 22:42:42,463 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:42:42,488 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:42:42,489 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:42 WrapperNode [2023-11-06 22:42:42,489 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:42:42,490 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:42:42,491 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:42:42,491 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:42:42,499 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:42" (1/1) ... [2023-11-06 22:42:42,539 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:42" (1/1) ... [2023-11-06 22:42:42,637 INFO L138 Inliner]: procedures = 26, calls = 128, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 885 [2023-11-06 22:42:42,638 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:42:42,639 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:42:42,639 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:42:42,639 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:42:42,650 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:42" (1/1) ... [2023-11-06 22:42:42,650 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:42" (1/1) ... [2023-11-06 22:42:42,659 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:42" (1/1) ... [2023-11-06 22:42:42,659 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:42" (1/1) ... [2023-11-06 22:42:42,695 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:42" (1/1) ... [2023-11-06 22:42:42,705 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:42" (1/1) ... [2023-11-06 22:42:42,718 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:42" (1/1) ... [2023-11-06 22:42:42,727 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:42" (1/1) ... [2023-11-06 22:42:42,747 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:42:42,748 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:42:42,749 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:42:42,749 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:42:42,750 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:42" (1/1) ... [2023-11-06 22:42:42,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:42:42,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89f3e463-973e-412c-b2f7-1268382b82d1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:42:42,815 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89f3e463-973e-412c-b2f7-1268382b82d1/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:42:42,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89f3e463-973e-412c-b2f7-1268382b82d1/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:42:42,867 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:42:42,868 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-06 22:42:42,868 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-06 22:42:42,868 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:42:42,868 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:42:42,868 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:42:43,095 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:42:43,097 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:42:44,525 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:42:44,544 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:42:44,544 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-06 22:42:44,548 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:42:44 BoogieIcfgContainer [2023-11-06 22:42:44,549 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:42:44,555 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:42:44,555 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:42:44,559 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:42:44,559 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:42:41" (1/3) ... [2023-11-06 22:42:44,560 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39609724 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:42:44, skipping insertion in model container [2023-11-06 22:42:44,560 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:42" (2/3) ... [2023-11-06 22:42:44,562 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39609724 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:42:44, skipping insertion in model container [2023-11-06 22:42:44,563 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:42:44" (3/3) ... [2023-11-06 22:42:44,564 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_fillercode_fillercodesize_ps-cn-500_file-54.i [2023-11-06 22:42:44,586 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:42:44,587 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 22:42:44,678 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:42:44,688 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;@27786946, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:42:44,689 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-06 22:42:44,697 INFO L276 IsEmpty]: Start isEmpty. Operand has 336 states, 218 states have (on average 1.6192660550458715) internal successors, (353), 219 states have internal predecessors, (353), 115 states have call successors, (115), 1 states have call predecessors, (115), 1 states have return successors, (115), 115 states have call predecessors, (115), 115 states have call successors, (115) [2023-11-06 22:42:44,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 722 [2023-11-06 22:42:44,763 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:42:44,764 INFO L195 NwaCegarLoop]: trace histogram [115, 115, 115, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:42:44,765 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:42:44,770 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:42:44,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1887447529, now seen corresponding path program 1 times [2023-11-06 22:42:44,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:42:44,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908209610] [2023-11-06 22:42:44,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:42:44,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:42:45,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:42:45,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:42:45,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908209610] [2023-11-06 22:42:45,273 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-06 22:42:45,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979195211] [2023-11-06 22:42:45,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:42:45,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:42:45,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89f3e463-973e-412c-b2f7-1268382b82d1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:42:45,278 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89f3e463-973e-412c-b2f7-1268382b82d1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:42:45,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89f3e463-973e-412c-b2f7-1268382b82d1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:42:45,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:42:45,963 INFO L262 TraceCheckSpWp]: Trace formula consists of 1684 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-06 22:42:46,019 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:42:46,188 INFO L134 CoverageAnalysis]: Checked inductivity of 26220 backedges. 228 proven. 0 refuted. 0 times theorem prover too weak. 25992 trivial. 0 not checked. [2023-11-06 22:42:46,189 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:42:46,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979195211] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:42:46,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:42:46,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:42:46,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766514507] [2023-11-06 22:42:46,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:42:46,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-06 22:42:46,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:42:46,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-06 22:42:46,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 22:42:46,245 INFO L87 Difference]: Start difference. First operand has 336 states, 218 states have (on average 1.6192660550458715) internal successors, (353), 219 states have internal predecessors, (353), 115 states have call successors, (115), 1 states have call predecessors, (115), 1 states have return successors, (115), 115 states have call predecessors, (115), 115 states have call successors, (115) Second operand has 2 states, 2 states have (on average 75.5) internal successors, (151), 2 states have internal predecessors, (151), 2 states have call successors, (115), 2 states have call predecessors, (115), 1 states have return successors, (115), 1 states have call predecessors, (115), 2 states have call successors, (115) [2023-11-06 22:42:46,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:42:46,369 INFO L93 Difference]: Finished difference Result 665 states and 1275 transitions. [2023-11-06 22:42:46,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-06 22:42:46,378 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 75.5) internal successors, (151), 2 states have internal predecessors, (151), 2 states have call successors, (115), 2 states have call predecessors, (115), 1 states have return successors, (115), 1 states have call predecessors, (115), 2 states have call successors, (115) Word has length 721 [2023-11-06 22:42:46,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:42:46,404 INFO L225 Difference]: With dead ends: 665 [2023-11-06 22:42:46,404 INFO L226 Difference]: Without dead ends: 332 [2023-11-06 22:42:46,417 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 720 GetRequests, 720 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 22:42:46,425 INFO L413 NwaCegarLoop]: 574 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, 574 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 22:42:46,428 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 574 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:42:46,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2023-11-06 22:42:46,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 332. [2023-11-06 22:42:46,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 215 states have (on average 1.6) internal successors, (344), 215 states have internal predecessors, (344), 115 states have call successors, (115), 1 states have call predecessors, (115), 1 states have return successors, (115), 115 states have call predecessors, (115), 115 states have call successors, (115) [2023-11-06 22:42:46,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 574 transitions. [2023-11-06 22:42:46,647 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 574 transitions. Word has length 721 [2023-11-06 22:42:46,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:42:46,650 INFO L495 AbstractCegarLoop]: Abstraction has 332 states and 574 transitions. [2023-11-06 22:42:46,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 75.5) internal successors, (151), 2 states have internal predecessors, (151), 2 states have call successors, (115), 2 states have call predecessors, (115), 1 states have return successors, (115), 1 states have call predecessors, (115), 2 states have call successors, (115) [2023-11-06 22:42:46,651 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 574 transitions. [2023-11-06 22:42:46,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 722 [2023-11-06 22:42:46,691 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:42:46,693 INFO L195 NwaCegarLoop]: trace histogram [115, 115, 115, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:42:46,709 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89f3e463-973e-412c-b2f7-1268382b82d1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 22:42:46,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89f3e463-973e-412c-b2f7-1268382b82d1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-06 22:42:46,904 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:42:46,905 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:42:46,906 INFO L85 PathProgramCache]: Analyzing trace with hash -126658029, now seen corresponding path program 1 times [2023-11-06 22:42:46,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:42:46,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301043904] [2023-11-06 22:42:46,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:42:46,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:42:47,190 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:42:47,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [535093736] [2023-11-06 22:42:47,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:42:47,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:42:47,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89f3e463-973e-412c-b2f7-1268382b82d1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:42:47,193 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89f3e463-973e-412c-b2f7-1268382b82d1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:42:47,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89f3e463-973e-412c-b2f7-1268382b82d1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 22:42:47,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:42:47,891 INFO L262 TraceCheckSpWp]: Trace formula consists of 1684 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 22:42:47,970 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:42:48,171 INFO L134 CoverageAnalysis]: Checked inductivity of 26220 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26220 trivial. 0 not checked. [2023-11-06 22:42:48,171 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:42:48,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:42:48,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301043904] [2023-11-06 22:42:48,176 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:42:48,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535093736] [2023-11-06 22:42:48,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535093736] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:42:48,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:42:48,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:42:48,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716686245] [2023-11-06 22:42:48,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:42:48,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:42:48,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:42:48,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:42:48,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:42:48,186 INFO L87 Difference]: Start difference. First operand 332 states and 574 transitions. Second operand has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 1 states have call successors, (115), 1 states have call predecessors, (115), 1 states have return successors, (115), 1 states have call predecessors, (115), 1 states have call successors, (115) [2023-11-06 22:42:48,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:42:48,312 INFO L93 Difference]: Finished difference Result 855 states and 1471 transitions. [2023-11-06 22:42:48,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:42:48,313 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 1 states have call successors, (115), 1 states have call predecessors, (115), 1 states have return successors, (115), 1 states have call predecessors, (115), 1 states have call successors, (115) Word has length 721 [2023-11-06 22:42:48,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:42:48,324 INFO L225 Difference]: With dead ends: 855 [2023-11-06 22:42:48,325 INFO L226 Difference]: Without dead ends: 526 [2023-11-06 22:42:48,327 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 720 GetRequests, 719 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 22:42:48,329 INFO L413 NwaCegarLoop]: 762 mSDtfsCounter, 297 mSDsluCounter, 561 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 1323 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:42:48,330 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [297 Valid, 1323 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:42:48,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2023-11-06 22:42:48,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 523. [2023-11-06 22:42:48,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 523 states, 333 states have (on average 1.5705705705705706) internal successors, (523), 334 states have internal predecessors, (523), 187 states have call successors, (187), 2 states have call predecessors, (187), 2 states have return successors, (187), 186 states have call predecessors, (187), 187 states have call successors, (187) [2023-11-06 22:42:48,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 897 transitions. [2023-11-06 22:42:48,453 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 897 transitions. Word has length 721 [2023-11-06 22:42:48,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:42:48,456 INFO L495 AbstractCegarLoop]: Abstraction has 523 states and 897 transitions. [2023-11-06 22:42:48,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 1 states have call successors, (115), 1 states have call predecessors, (115), 1 states have return successors, (115), 1 states have call predecessors, (115), 1 states have call successors, (115) [2023-11-06 22:42:48,457 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 897 transitions. [2023-11-06 22:42:48,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 722 [2023-11-06 22:42:48,468 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:42:48,468 INFO L195 NwaCegarLoop]: trace histogram [115, 115, 115, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:42:48,480 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89f3e463-973e-412c-b2f7-1268382b82d1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 22:42:48,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89f3e463-973e-412c-b2f7-1268382b82d1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:42:48,679 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:42:48,680 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:42:48,681 INFO L85 PathProgramCache]: Analyzing trace with hash 1562285713, now seen corresponding path program 1 times [2023-11-06 22:42:48,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:42:48,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166780036] [2023-11-06 22:42:48,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:42:48,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:42:48,842 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:42:48,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [229133965] [2023-11-06 22:42:48,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:42:48,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:42:48,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89f3e463-973e-412c-b2f7-1268382b82d1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:42:48,845 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89f3e463-973e-412c-b2f7-1268382b82d1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:42:48,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89f3e463-973e-412c-b2f7-1268382b82d1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 22:42:49,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:42:49,525 INFO L262 TraceCheckSpWp]: Trace formula consists of 1685 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 22:42:49,549 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:42:53,255 INFO L134 CoverageAnalysis]: Checked inductivity of 26220 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26220 trivial. 0 not checked. [2023-11-06 22:42:53,259 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:42:53,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:42:53,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166780036] [2023-11-06 22:42:53,260 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:42:53,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229133965] [2023-11-06 22:42:53,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229133965] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:42:53,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:42:53,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:42:53,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608188690] [2023-11-06 22:42:53,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:42:53,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:42:53,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:42:53,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:42:53,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:42:53,267 INFO L87 Difference]: Start difference. First operand 523 states and 897 transitions. Second operand has 5 states, 5 states have (on average 29.8) internal successors, (149), 4 states have internal predecessors, (149), 1 states have call successors, (115), 1 states have call predecessors, (115), 1 states have return successors, (115), 1 states have call predecessors, (115), 1 states have call successors, (115) [2023-11-06 22:42:53,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:42:53,956 INFO L93 Difference]: Finished difference Result 1581 states and 2746 transitions. [2023-11-06 22:42:53,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:42:53,958 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.8) internal successors, (149), 4 states have internal predecessors, (149), 1 states have call successors, (115), 1 states have call predecessors, (115), 1 states have return successors, (115), 1 states have call predecessors, (115), 1 states have call successors, (115) Word has length 721 [2023-11-06 22:42:53,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:42:53,975 INFO L225 Difference]: With dead ends: 1581 [2023-11-06 22:42:53,976 INFO L226 Difference]: Without dead ends: 1061 [2023-11-06 22:42:53,979 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 721 GetRequests, 717 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:42:53,983 INFO L413 NwaCegarLoop]: 570 mSDtfsCounter, 863 mSDsluCounter, 1250 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 233 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 863 SdHoareTripleChecker+Valid, 1820 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 233 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-06 22:42:53,988 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [863 Valid, 1820 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [233 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-06 22:42:53,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1061 states. [2023-11-06 22:42:54,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1061 to 993. [2023-11-06 22:42:54,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 993 states, 687 states have (on average 1.6593886462882097) internal successors, (1140), 688 states have internal predecessors, (1140), 302 states have call successors, (302), 3 states have call predecessors, (302), 3 states have return successors, (302), 301 states have call predecessors, (302), 302 states have call successors, (302) [2023-11-06 22:42:54,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 993 states to 993 states and 1744 transitions. [2023-11-06 22:42:54,277 INFO L78 Accepts]: Start accepts. Automaton has 993 states and 1744 transitions. Word has length 721 [2023-11-06 22:42:54,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:42:54,279 INFO L495 AbstractCegarLoop]: Abstraction has 993 states and 1744 transitions. [2023-11-06 22:42:54,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.8) internal successors, (149), 4 states have internal predecessors, (149), 1 states have call successors, (115), 1 states have call predecessors, (115), 1 states have return successors, (115), 1 states have call predecessors, (115), 1 states have call successors, (115) [2023-11-06 22:42:54,280 INFO L276 IsEmpty]: Start isEmpty. Operand 993 states and 1744 transitions. [2023-11-06 22:42:54,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 723 [2023-11-06 22:42:54,290 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:42:54,291 INFO L195 NwaCegarLoop]: trace histogram [115, 115, 115, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:42:54,309 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89f3e463-973e-412c-b2f7-1268382b82d1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-06 22:42:54,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89f3e463-973e-412c-b2f7-1268382b82d1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:42:54,502 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:42:54,502 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:42:54,502 INFO L85 PathProgramCache]: Analyzing trace with hash -1071875620, now seen corresponding path program 1 times [2023-11-06 22:42:54,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:42:54,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932312463] [2023-11-06 22:42:54,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:42:54,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:42:54,677 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:42:54,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [788104617] [2023-11-06 22:42:54,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:42:54,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:42:54,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89f3e463-973e-412c-b2f7-1268382b82d1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:42:54,680 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89f3e463-973e-412c-b2f7-1268382b82d1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:42:54,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89f3e463-973e-412c-b2f7-1268382b82d1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 22:42:55,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:42:55,356 INFO L262 TraceCheckSpWp]: Trace formula consists of 1686 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:42:55,376 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:42:56,018 INFO L134 CoverageAnalysis]: Checked inductivity of 26220 backedges. 11154 proven. 102 refuted. 0 times theorem prover too weak. 14964 trivial. 0 not checked. [2023-11-06 22:42:56,019 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:42:56,727 INFO L134 CoverageAnalysis]: Checked inductivity of 26220 backedges. 240 proven. 102 refuted. 0 times theorem prover too weak. 25878 trivial. 0 not checked. [2023-11-06 22:42:56,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:42:56,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932312463] [2023-11-06 22:42:56,728 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:42:56,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788104617] [2023-11-06 22:42:56,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788104617] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:42:56,728 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:42:56,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-11-06 22:42:56,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257664013] [2023-11-06 22:42:56,730 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:42:56,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 22:42:56,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:42:56,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 22:42:56,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:42:56,736 INFO L87 Difference]: Start difference. First operand 993 states and 1744 transitions. Second operand has 8 states, 8 states have (on average 26.875) internal successors, (215), 8 states have internal predecessors, (215), 3 states have call successors, (149), 2 states have call predecessors, (149), 4 states have return successors, (150), 3 states have call predecessors, (150), 3 states have call successors, (150) [2023-11-06 22:42:57,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:42:57,610 INFO L93 Difference]: Finished difference Result 1703 states and 2990 transitions. [2023-11-06 22:42:57,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 22:42:57,611 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 26.875) internal successors, (215), 8 states have internal predecessors, (215), 3 states have call successors, (149), 2 states have call predecessors, (149), 4 states have return successors, (150), 3 states have call predecessors, (150), 3 states have call successors, (150) Word has length 722 [2023-11-06 22:42:57,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:42:57,621 INFO L225 Difference]: With dead ends: 1703 [2023-11-06 22:42:57,622 INFO L226 Difference]: Without dead ends: 1007 [2023-11-06 22:42:57,624 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1446 GetRequests, 1436 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 22:42:57,625 INFO L413 NwaCegarLoop]: 449 mSDtfsCounter, 368 mSDsluCounter, 667 mSDsCounter, 0 mSdLazyCounter, 593 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 448 SdHoareTripleChecker+Valid, 1116 SdHoareTripleChecker+Invalid, 613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-06 22:42:57,626 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [448 Valid, 1116 Invalid, 613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 593 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-06 22:42:57,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1007 states. [2023-11-06 22:42:57,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1007 to 1001. [2023-11-06 22:42:57,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1001 states, 693 states have (on average 1.645021645021645) internal successors, (1140), 694 states have internal predecessors, (1140), 302 states have call successors, (302), 5 states have call predecessors, (302), 5 states have return successors, (302), 301 states have call predecessors, (302), 302 states have call successors, (302) [2023-11-06 22:42:57,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1001 states to 1001 states and 1744 transitions. [2023-11-06 22:42:57,862 INFO L78 Accepts]: Start accepts. Automaton has 1001 states and 1744 transitions. Word has length 722 [2023-11-06 22:42:57,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:42:57,865 INFO L495 AbstractCegarLoop]: Abstraction has 1001 states and 1744 transitions. [2023-11-06 22:42:57,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 26.875) internal successors, (215), 8 states have internal predecessors, (215), 3 states have call successors, (149), 2 states have call predecessors, (149), 4 states have return successors, (150), 3 states have call predecessors, (150), 3 states have call successors, (150) [2023-11-06 22:42:57,866 INFO L276 IsEmpty]: Start isEmpty. Operand 1001 states and 1744 transitions. [2023-11-06 22:42:57,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 724 [2023-11-06 22:42:57,874 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:42:57,875 INFO L195 NwaCegarLoop]: trace histogram [115, 115, 115, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:42:57,885 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89f3e463-973e-412c-b2f7-1268382b82d1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 22:42:58,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89f3e463-973e-412c-b2f7-1268382b82d1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:42:58,084 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:42:58,085 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:42:58,085 INFO L85 PathProgramCache]: Analyzing trace with hash 638662772, now seen corresponding path program 1 times [2023-11-06 22:42:58,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:42:58,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676435458] [2023-11-06 22:42:58,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:42:58,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:42:58,233 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:42:58,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [746025133] [2023-11-06 22:42:58,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:42:58,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:42:58,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89f3e463-973e-412c-b2f7-1268382b82d1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:42:58,235 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89f3e463-973e-412c-b2f7-1268382b82d1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:42:58,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89f3e463-973e-412c-b2f7-1268382b82d1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 22:42:58,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:42:58,856 INFO L262 TraceCheckSpWp]: Trace formula consists of 1690 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 22:42:58,873 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:42:58,960 INFO L134 CoverageAnalysis]: Checked inductivity of 26220 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26220 trivial. 0 not checked. [2023-11-06 22:42:58,960 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:42:58,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:42:58,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676435458] [2023-11-06 22:42:58,961 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:42:58,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746025133] [2023-11-06 22:42:58,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746025133] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:42:58,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:42:58,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:42:58,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908364285] [2023-11-06 22:42:58,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:42:58,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:42:58,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:42:58,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:42:58,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:42:58,974 INFO L87 Difference]: Start difference. First operand 1001 states and 1744 transitions. Second operand has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 1 states have call successors, (115), 1 states have call predecessors, (115), 1 states have return successors, (115), 1 states have call predecessors, (115), 1 states have call successors, (115) [2023-11-06 22:42:59,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:42:59,134 INFO L93 Difference]: Finished difference Result 2370 states and 4189 transitions. [2023-11-06 22:42:59,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:42:59,135 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 1 states have call successors, (115), 1 states have call predecessors, (115), 1 states have return successors, (115), 1 states have call predecessors, (115), 1 states have call successors, (115) Word has length 723 [2023-11-06 22:42:59,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:42:59,150 INFO L225 Difference]: With dead ends: 2370 [2023-11-06 22:42:59,150 INFO L226 Difference]: Without dead ends: 1599 [2023-11-06 22:42:59,156 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 722 GetRequests, 721 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 22:42:59,157 INFO L413 NwaCegarLoop]: 909 mSDtfsCounter, 343 mSDsluCounter, 550 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 1459 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:42:59,157 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [343 Valid, 1459 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:42:59,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1599 states. [2023-11-06 22:42:59,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1599 to 1595. [2023-11-06 22:42:59,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1595 states, 1193 states have (on average 1.6756077116512993) internal successors, (1999), 1196 states have internal predecessors, (1999), 394 states have call successors, (394), 7 states have call predecessors, (394), 7 states have return successors, (394), 391 states have call predecessors, (394), 394 states have call successors, (394) [2023-11-06 22:42:59,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1595 states to 1595 states and 2787 transitions. [2023-11-06 22:42:59,407 INFO L78 Accepts]: Start accepts. Automaton has 1595 states and 2787 transitions. Word has length 723 [2023-11-06 22:42:59,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:42:59,409 INFO L495 AbstractCegarLoop]: Abstraction has 1595 states and 2787 transitions. [2023-11-06 22:42:59,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 1 states have call successors, (115), 1 states have call predecessors, (115), 1 states have return successors, (115), 1 states have call predecessors, (115), 1 states have call successors, (115) [2023-11-06 22:42:59,410 INFO L276 IsEmpty]: Start isEmpty. Operand 1595 states and 2787 transitions. [2023-11-06 22:42:59,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 724 [2023-11-06 22:42:59,419 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:42:59,419 INFO L195 NwaCegarLoop]: trace histogram [115, 115, 115, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:42:59,434 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89f3e463-973e-412c-b2f7-1268382b82d1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 22:42:59,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89f3e463-973e-412c-b2f7-1268382b82d1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:42:59,634 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:42:59,635 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:42:59,635 INFO L85 PathProgramCache]: Analyzing trace with hash -733144526, now seen corresponding path program 1 times [2023-11-06 22:42:59,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:42:59,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279193901] [2023-11-06 22:42:59,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:42:59,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:42:59,775 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:42:59,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1663654690] [2023-11-06 22:42:59,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:42:59,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:42:59,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89f3e463-973e-412c-b2f7-1268382b82d1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:42:59,777 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89f3e463-973e-412c-b2f7-1268382b82d1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:42:59,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89f3e463-973e-412c-b2f7-1268382b82d1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 22:43:00,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:43:00,574 INFO L262 TraceCheckSpWp]: Trace formula consists of 1687 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:43:00,592 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:43:01,160 INFO L134 CoverageAnalysis]: Checked inductivity of 26220 backedges. 12232 proven. 123 refuted. 0 times theorem prover too weak. 13865 trivial. 0 not checked. [2023-11-06 22:43:01,161 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:43:01,787 INFO L134 CoverageAnalysis]: Checked inductivity of 26220 backedges. 219 proven. 123 refuted. 0 times theorem prover too weak. 25878 trivial. 0 not checked. [2023-11-06 22:43:01,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:43:01,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279193901] [2023-11-06 22:43:01,788 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:43:01,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663654690] [2023-11-06 22:43:01,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663654690] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:43:01,788 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:43:01,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-06 22:43:01,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30302680] [2023-11-06 22:43:01,790 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:43:01,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:43:01,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:43:01,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:43:01,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:43:01,795 INFO L87 Difference]: Start difference. First operand 1595 states and 2787 transitions. Second operand has 7 states, 7 states have (on average 22.857142857142858) internal successors, (160), 7 states have internal predecessors, (160), 2 states have call successors, (156), 2 states have call predecessors, (156), 4 states have return successors, (157), 2 states have call predecessors, (157), 2 states have call successors, (157) [2023-11-06 22:43:02,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:43:02,892 INFO L93 Difference]: Finished difference Result 2142 states and 3717 transitions. [2023-11-06 22:43:02,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 22:43:02,893 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.857142857142858) internal successors, (160), 7 states have internal predecessors, (160), 2 states have call successors, (156), 2 states have call predecessors, (156), 4 states have return successors, (157), 2 states have call predecessors, (157), 2 states have call successors, (157) Word has length 723 [2023-11-06 22:43:02,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:43:02,904 INFO L225 Difference]: With dead ends: 2142 [2023-11-06 22:43:02,905 INFO L226 Difference]: Without dead ends: 1067 [2023-11-06 22:43:02,909 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1448 GetRequests, 1438 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 22:43:02,911 INFO L413 NwaCegarLoop]: 447 mSDtfsCounter, 650 mSDsluCounter, 661 mSDsCounter, 0 mSdLazyCounter, 591 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 722 SdHoareTripleChecker+Valid, 1108 SdHoareTripleChecker+Invalid, 758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-06 22:43:02,912 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [722 Valid, 1108 Invalid, 758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 591 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-06 22:43:02,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1067 states. [2023-11-06 22:43:03,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1067 to 1057. [2023-11-06 22:43:03,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1057 states, 773 states have (on average 1.6597671410090555) internal successors, (1283), 774 states have internal predecessors, (1283), 276 states have call successors, (276), 7 states have call predecessors, (276), 7 states have return successors, (276), 275 states have call predecessors, (276), 276 states have call successors, (276) [2023-11-06 22:43:03,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1057 states to 1057 states and 1835 transitions. [2023-11-06 22:43:03,084 INFO L78 Accepts]: Start accepts. Automaton has 1057 states and 1835 transitions. Word has length 723 [2023-11-06 22:43:03,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:43:03,086 INFO L495 AbstractCegarLoop]: Abstraction has 1057 states and 1835 transitions. [2023-11-06 22:43:03,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.857142857142858) internal successors, (160), 7 states have internal predecessors, (160), 2 states have call successors, (156), 2 states have call predecessors, (156), 4 states have return successors, (157), 2 states have call predecessors, (157), 2 states have call successors, (157) [2023-11-06 22:43:03,087 INFO L276 IsEmpty]: Start isEmpty. Operand 1057 states and 1835 transitions. [2023-11-06 22:43:03,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 724 [2023-11-06 22:43:03,096 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:43:03,097 INFO L195 NwaCegarLoop]: trace histogram [115, 115, 115, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:43:03,108 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89f3e463-973e-412c-b2f7-1268382b82d1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 22:43:03,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89f3e463-973e-412c-b2f7-1268382b82d1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:43:03,308 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:43:03,309 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:43:03,309 INFO L85 PathProgramCache]: Analyzing trace with hash -1566311694, now seen corresponding path program 1 times [2023-11-06 22:43:03,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:43:03,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84091614] [2023-11-06 22:43:03,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:43:03,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:43:03,457 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:43:03,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [693599416] [2023-11-06 22:43:03,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:43:03,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:43:03,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89f3e463-973e-412c-b2f7-1268382b82d1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:43:03,461 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89f3e463-973e-412c-b2f7-1268382b82d1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:43:03,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89f3e463-973e-412c-b2f7-1268382b82d1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 22:43:04,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:43:04,289 INFO L262 TraceCheckSpWp]: Trace formula consists of 1687 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 22:43:04,307 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:43:05,177 INFO L134 CoverageAnalysis]: Checked inductivity of 26220 backedges. 13204 proven. 177 refuted. 0 times theorem prover too weak. 12839 trivial. 0 not checked. [2023-11-06 22:43:05,178 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:43:05,973 INFO L134 CoverageAnalysis]: Checked inductivity of 26220 backedges. 165 proven. 177 refuted. 0 times theorem prover too weak. 25878 trivial. 0 not checked. [2023-11-06 22:43:05,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:43:05,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84091614] [2023-11-06 22:43:05,973 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:43:05,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693599416] [2023-11-06 22:43:05,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693599416] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:43:05,974 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:43:05,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2023-11-06 22:43:05,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791174808] [2023-11-06 22:43:05,975 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:43:05,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-06 22:43:05,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:43:05,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-06 22:43:05,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2023-11-06 22:43:05,980 INFO L87 Difference]: Start difference. First operand 1057 states and 1835 transitions. Second operand has 14 states, 14 states have (on average 17.142857142857142) internal successors, (240), 14 states have internal predecessors, (240), 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 22:43:10,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:43:10,261 INFO L93 Difference]: Finished difference Result 3835 states and 6610 transitions. [2023-11-06 22:43:10,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-11-06 22:43:10,262 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 17.142857142857142) internal successors, (240), 14 states have internal predecessors, (240), 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 723 [2023-11-06 22:43:10,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:43:10,291 INFO L225 Difference]: With dead ends: 3835 [2023-11-06 22:43:10,291 INFO L226 Difference]: Without dead ends: 3234 [2023-11-06 22:43:10,297 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1480 GetRequests, 1436 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=517, Invalid=1553, Unknown=0, NotChecked=0, Total=2070 [2023-11-06 22:43:10,298 INFO L413 NwaCegarLoop]: 586 mSDtfsCounter, 2549 mSDsluCounter, 3334 mSDsCounter, 0 mSdLazyCounter, 2640 mSolverCounterSat, 1169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2661 SdHoareTripleChecker+Valid, 3920 SdHoareTripleChecker+Invalid, 3809 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1169 IncrementalHoareTripleChecker+Valid, 2640 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:43:10,299 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2661 Valid, 3920 Invalid, 3809 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1169 Valid, 2640 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2023-11-06 22:43:10,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3234 states. [2023-11-06 22:43:10,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3234 to 2894. [2023-11-06 22:43:10,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2894 states, 2278 states have (on average 1.697980684811238) internal successors, (3868), 2285 states have internal predecessors, (3868), 596 states have call successors, (596), 19 states have call predecessors, (596), 19 states have return successors, (596), 589 states have call predecessors, (596), 596 states have call successors, (596) [2023-11-06 22:43:10,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2894 states to 2894 states and 5060 transitions. [2023-11-06 22:43:10,738 INFO L78 Accepts]: Start accepts. Automaton has 2894 states and 5060 transitions. Word has length 723 [2023-11-06 22:43:10,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:43:10,739 INFO L495 AbstractCegarLoop]: Abstraction has 2894 states and 5060 transitions. [2023-11-06 22:43:10,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 17.142857142857142) internal successors, (240), 14 states have internal predecessors, (240), 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 22:43:10,740 INFO L276 IsEmpty]: Start isEmpty. Operand 2894 states and 5060 transitions. [2023-11-06 22:43:10,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 724 [2023-11-06 22:43:10,752 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:43:10,753 INFO L195 NwaCegarLoop]: trace histogram [115, 115, 115, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:43:10,766 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89f3e463-973e-412c-b2f7-1268382b82d1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 22:43:10,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89f3e463-973e-412c-b2f7-1268382b82d1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:43:10,965 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:43:10,966 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:43:10,966 INFO L85 PathProgramCache]: Analyzing trace with hash -864711820, now seen corresponding path program 1 times [2023-11-06 22:43:10,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:43:10,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754911655] [2023-11-06 22:43:10,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:43:10,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:43:11,090 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:43:11,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1341556818] [2023-11-06 22:43:11,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:43:11,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:43:11,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89f3e463-973e-412c-b2f7-1268382b82d1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:43:11,098 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89f3e463-973e-412c-b2f7-1268382b82d1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:43:11,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89f3e463-973e-412c-b2f7-1268382b82d1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 22:43:11,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:43:11,834 INFO L262 TraceCheckSpWp]: Trace formula consists of 1687 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 22:43:11,851 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:43:13,077 INFO L134 CoverageAnalysis]: Checked inductivity of 26220 backedges. 16896 proven. 90 refuted. 0 times theorem prover too weak. 9234 trivial. 0 not checked. [2023-11-06 22:43:13,077 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:43:13,671 INFO L134 CoverageAnalysis]: Checked inductivity of 26220 backedges. 252 proven. 90 refuted. 0 times theorem prover too weak. 25878 trivial. 0 not checked. [2023-11-06 22:43:13,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:43:13,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754911655] [2023-11-06 22:43:13,671 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:43:13,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341556818] [2023-11-06 22:43:13,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341556818] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:43:13,672 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:43:13,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-11-06 22:43:13,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969887440] [2023-11-06 22:43:13,673 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:43:13,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 22:43:13,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:43:13,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 22:43:13,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-11-06 22:43:13,678 INFO L87 Difference]: Start difference. First operand 2894 states and 5060 transitions. Second operand has 10 states, 10 states have (on average 22.0) internal successors, (220), 10 states have internal predecessors, (220), 5 states have call successors, (176), 3 states have call predecessors, (176), 5 states have return successors, (176), 5 states have call predecessors, (176), 5 states have call successors, (176) [2023-11-06 22:43:14,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:43:14,793 INFO L93 Difference]: Finished difference Result 5454 states and 9518 transitions. [2023-11-06 22:43:14,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 22:43:14,794 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 22.0) internal successors, (220), 10 states have internal predecessors, (220), 5 states have call successors, (176), 3 states have call predecessors, (176), 5 states have return successors, (176), 5 states have call predecessors, (176), 5 states have call successors, (176) Word has length 723 [2023-11-06 22:43:14,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:43:14,825 INFO L225 Difference]: With dead ends: 5454 [2023-11-06 22:43:14,825 INFO L226 Difference]: Without dead ends: 2926 [2023-11-06 22:43:14,834 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1448 GetRequests, 1436 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 22:43:14,836 INFO L413 NwaCegarLoop]: 425 mSDtfsCounter, 663 mSDsluCounter, 614 mSDsCounter, 0 mSdLazyCounter, 657 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 747 SdHoareTripleChecker+Valid, 1039 SdHoareTripleChecker+Invalid, 780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 657 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-06 22:43:14,837 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [747 Valid, 1039 Invalid, 780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 657 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-06 22:43:14,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2926 states. [2023-11-06 22:43:15,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2926 to 2902. [2023-11-06 22:43:15,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2902 states, 2284 states have (on average 1.6908931698774081) internal successors, (3862), 2291 states have internal predecessors, (3862), 596 states have call successors, (596), 21 states have call predecessors, (596), 21 states have return successors, (596), 589 states have call predecessors, (596), 596 states have call successors, (596) [2023-11-06 22:43:15,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2902 states to 2902 states and 5054 transitions. [2023-11-06 22:43:15,296 INFO L78 Accepts]: Start accepts. Automaton has 2902 states and 5054 transitions. Word has length 723 [2023-11-06 22:43:15,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:43:15,298 INFO L495 AbstractCegarLoop]: Abstraction has 2902 states and 5054 transitions. [2023-11-06 22:43:15,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 22.0) internal successors, (220), 10 states have internal predecessors, (220), 5 states have call successors, (176), 3 states have call predecessors, (176), 5 states have return successors, (176), 5 states have call predecessors, (176), 5 states have call successors, (176) [2023-11-06 22:43:15,299 INFO L276 IsEmpty]: Start isEmpty. Operand 2902 states and 5054 transitions. [2023-11-06 22:43:15,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 724 [2023-11-06 22:43:15,311 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:43:15,311 INFO L195 NwaCegarLoop]: trace histogram [115, 115, 115, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:43:15,328 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89f3e463-973e-412c-b2f7-1268382b82d1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 22:43:15,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89f3e463-973e-412c-b2f7-1268382b82d1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-06 22:43:15,523 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:43:15,523 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:43:15,524 INFO L85 PathProgramCache]: Analyzing trace with hash 11307186, now seen corresponding path program 1 times [2023-11-06 22:43:15,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:43:15,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065275675] [2023-11-06 22:43:15,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:43:15,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:43:15,619 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:43:15,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [918641622] [2023-11-06 22:43:15,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:43:15,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:43:15,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89f3e463-973e-412c-b2f7-1268382b82d1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:43:15,622 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89f3e463-973e-412c-b2f7-1268382b82d1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:43:15,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89f3e463-973e-412c-b2f7-1268382b82d1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 22:43:16,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:43:16,359 INFO L262 TraceCheckSpWp]: Trace formula consists of 1684 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-06 22:43:16,383 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:43:18,000 INFO L134 CoverageAnalysis]: Checked inductivity of 26220 backedges. 14881 proven. 324 refuted. 0 times theorem prover too weak. 11015 trivial. 0 not checked. [2023-11-06 22:43:18,001 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:43:20,239 INFO L134 CoverageAnalysis]: Checked inductivity of 26220 backedges. 354 proven. 327 refuted. 0 times theorem prover too weak. 25539 trivial. 0 not checked. [2023-11-06 22:43:20,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:43:20,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065275675] [2023-11-06 22:43:20,240 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:43:20,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918641622] [2023-11-06 22:43:20,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918641622] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:43:20,240 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:43:20,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2023-11-06 22:43:20,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479792254] [2023-11-06 22:43:20,241 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:43:20,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-06 22:43:20,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:43:20,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-06 22:43:20,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2023-11-06 22:43:20,246 INFO L87 Difference]: Start difference. First operand 2902 states and 5054 transitions. Second operand has 17 states, 17 states have (on average 14.588235294117647) internal successors, (248), 17 states have internal predecessors, (248), 5 states have call successors, (174), 3 states have call predecessors, (174), 7 states have return successors, (175), 5 states have call predecessors, (175), 5 states have call successors, (175) [2023-11-06 22:43:24,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:43:24,427 INFO L93 Difference]: Finished difference Result 4475 states and 7658 transitions. [2023-11-06 22:43:24,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-06 22:43:24,428 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 14.588235294117647) internal successors, (248), 17 states have internal predecessors, (248), 5 states have call successors, (174), 3 states have call predecessors, (174), 7 states have return successors, (175), 5 states have call predecessors, (175), 5 states have call successors, (175) Word has length 723 [2023-11-06 22:43:24,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:43:24,455 INFO L225 Difference]: With dead ends: 4475 [2023-11-06 22:43:24,455 INFO L226 Difference]: Without dead ends: 2573 [2023-11-06 22:43:24,463 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1469 GetRequests, 1431 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=466, Invalid=1094, Unknown=0, NotChecked=0, Total=1560 [2023-11-06 22:43:24,466 INFO L413 NwaCegarLoop]: 783 mSDtfsCounter, 1048 mSDsluCounter, 3379 mSDsCounter, 0 mSdLazyCounter, 3330 mSolverCounterSat, 416 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1160 SdHoareTripleChecker+Valid, 4162 SdHoareTripleChecker+Invalid, 3746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 416 IncrementalHoareTripleChecker+Valid, 3330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2023-11-06 22:43:24,467 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1160 Valid, 4162 Invalid, 3746 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [416 Valid, 3330 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2023-11-06 22:43:24,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2573 states. [2023-11-06 22:43:24,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2573 to 2242. [2023-11-06 22:43:24,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2242 states, 1736 states have (on average 1.6705069124423964) internal successors, (2900), 1741 states have internal predecessors, (2900), 486 states have call successors, (486), 19 states have call predecessors, (486), 19 states have return successors, (486), 481 states have call predecessors, (486), 486 states have call successors, (486) [2023-11-06 22:43:24,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2242 states to 2242 states and 3872 transitions. [2023-11-06 22:43:24,818 INFO L78 Accepts]: Start accepts. Automaton has 2242 states and 3872 transitions. Word has length 723 [2023-11-06 22:43:24,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:43:24,820 INFO L495 AbstractCegarLoop]: Abstraction has 2242 states and 3872 transitions. [2023-11-06 22:43:24,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 14.588235294117647) internal successors, (248), 17 states have internal predecessors, (248), 5 states have call successors, (174), 3 states have call predecessors, (174), 7 states have return successors, (175), 5 states have call predecessors, (175), 5 states have call successors, (175) [2023-11-06 22:43:24,821 INFO L276 IsEmpty]: Start isEmpty. Operand 2242 states and 3872 transitions. [2023-11-06 22:43:24,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 725 [2023-11-06 22:43:24,832 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:43:24,833 INFO L195 NwaCegarLoop]: trace histogram [115, 115, 115, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:43:24,849 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89f3e463-973e-412c-b2f7-1268382b82d1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-06 22:43:25,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89f3e463-973e-412c-b2f7-1268382b82d1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-06 22:43:25,044 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:43:25,044 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:43:25,045 INFO L85 PathProgramCache]: Analyzing trace with hash 1700757492, now seen corresponding path program 1 times [2023-11-06 22:43:25,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:43:25,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770809106] [2023-11-06 22:43:25,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:43:25,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:43:25,162 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:43:25,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1555891361] [2023-11-06 22:43:25,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:43:25,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:43:25,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89f3e463-973e-412c-b2f7-1268382b82d1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:43:25,164 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89f3e463-973e-412c-b2f7-1268382b82d1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:43:25,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89f3e463-973e-412c-b2f7-1268382b82d1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 22:43:25,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:43:25,906 INFO L262 TraceCheckSpWp]: Trace formula consists of 1690 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 22:43:25,919 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:43:26,045 INFO L134 CoverageAnalysis]: Checked inductivity of 26220 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26220 trivial. 0 not checked. [2023-11-06 22:43:26,046 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:43:26,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:43:26,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770809106] [2023-11-06 22:43:26,046 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:43:26,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555891361] [2023-11-06 22:43:26,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555891361] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:43:26,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:43:26,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:43:26,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025956807] [2023-11-06 22:43:26,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:43:26,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:43:26,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:43:26,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:43:26,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:43:26,051 INFO L87 Difference]: Start difference. First operand 2242 states and 3872 transitions. Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 1 states have call successors, (115), 1 states have call predecessors, (115), 1 states have return successors, (115), 1 states have call predecessors, (115), 1 states have call successors, (115) [2023-11-06 22:43:26,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:43:26,385 INFO L93 Difference]: Finished difference Result 5541 states and 9561 transitions. [2023-11-06 22:43:26,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:43:26,386 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 1 states have call successors, (115), 1 states have call predecessors, (115), 1 states have return successors, (115), 1 states have call predecessors, (115), 1 states have call successors, (115) Word has length 724 [2023-11-06 22:43:26,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:43:26,424 INFO L225 Difference]: With dead ends: 5541 [2023-11-06 22:43:26,424 INFO L226 Difference]: Without dead ends: 3955 [2023-11-06 22:43:26,432 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 723 GetRequests, 722 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 22:43:26,433 INFO L413 NwaCegarLoop]: 1100 mSDtfsCounter, 534 mSDsluCounter, 558 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 534 SdHoareTripleChecker+Valid, 1658 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:43:26,434 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [534 Valid, 1658 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:43:26,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3955 states. [2023-11-06 22:43:26,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3955 to 3156. [2023-11-06 22:43:26,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3156 states, 2650 states have (on average 1.7309433962264151) internal successors, (4587), 2655 states have internal predecessors, (4587), 486 states have call successors, (486), 19 states have call predecessors, (486), 19 states have return successors, (486), 481 states have call predecessors, (486), 486 states have call successors, (486) [2023-11-06 22:43:26,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3156 states to 3156 states and 5559 transitions. [2023-11-06 22:43:26,896 INFO L78 Accepts]: Start accepts. Automaton has 3156 states and 5559 transitions. Word has length 724 [2023-11-06 22:43:26,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:43:26,898 INFO L495 AbstractCegarLoop]: Abstraction has 3156 states and 5559 transitions. [2023-11-06 22:43:26,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 1 states have call successors, (115), 1 states have call predecessors, (115), 1 states have return successors, (115), 1 states have call predecessors, (115), 1 states have call successors, (115) [2023-11-06 22:43:26,899 INFO L276 IsEmpty]: Start isEmpty. Operand 3156 states and 5559 transitions. [2023-11-06 22:43:26,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 725 [2023-11-06 22:43:26,950 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:43:26,951 INFO L195 NwaCegarLoop]: trace histogram [115, 115, 115, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:43:26,969 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89f3e463-973e-412c-b2f7-1268382b82d1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-06 22:43:27,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89f3e463-973e-412c-b2f7-1268382b82d1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-06 22:43:27,162 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:43:27,162 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:43:27,163 INFO L85 PathProgramCache]: Analyzing trace with hash 989519309, now seen corresponding path program 1 times [2023-11-06 22:43:27,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:43:27,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232814890] [2023-11-06 22:43:27,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:43:27,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:43:27,292 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:43:27,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [686273344] [2023-11-06 22:43:27,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:43:27,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:43:27,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89f3e463-973e-412c-b2f7-1268382b82d1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:43:27,294 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89f3e463-973e-412c-b2f7-1268382b82d1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:43:27,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89f3e463-973e-412c-b2f7-1268382b82d1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-06 22:43:28,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:43:28,216 INFO L262 TraceCheckSpWp]: Trace formula consists of 1688 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 22:43:28,237 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:43:29,278 INFO L134 CoverageAnalysis]: Checked inductivity of 26220 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26220 trivial. 0 not checked. [2023-11-06 22:43:29,278 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:43:29,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:43:29,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232814890] [2023-11-06 22:43:29,279 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:43:29,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686273344] [2023-11-06 22:43:29,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686273344] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:43:29,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:43:29,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:43:29,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946355873] [2023-11-06 22:43:29,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:43:29,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:43:29,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:43:29,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:43:29,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:43:29,282 INFO L87 Difference]: Start difference. First operand 3156 states and 5559 transitions. Second operand has 4 states, 4 states have (on average 38.0) internal successors, (152), 3 states have internal predecessors, (152), 1 states have call successors, (115), 1 states have call predecessors, (115), 1 states have return successors, (115), 1 states have call predecessors, (115), 1 states have call successors, (115) [2023-11-06 22:43:29,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:43:29,707 INFO L93 Difference]: Finished difference Result 7912 states and 13877 transitions. [2023-11-06 22:43:29,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:43:29,708 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.0) internal successors, (152), 3 states have internal predecessors, (152), 1 states have call successors, (115), 1 states have call predecessors, (115), 1 states have return successors, (115), 1 states have call predecessors, (115), 1 states have call successors, (115) Word has length 724 [2023-11-06 22:43:29,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:43:29,755 INFO L225 Difference]: With dead ends: 7912 [2023-11-06 22:43:29,755 INFO L226 Difference]: Without dead ends: 5944 [2023-11-06 22:43:29,764 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 724 GetRequests, 721 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 22:43:29,765 INFO L413 NwaCegarLoop]: 559 mSDtfsCounter, 219 mSDsluCounter, 1112 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 1671 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:43:29,765 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [219 Valid, 1671 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:43:29,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5944 states. [2023-11-06 22:43:30,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5944 to 5942. [2023-11-06 22:43:30,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5942 states, 5053 states have (on average 1.7314466653473184) internal successors, (8749), 5063 states have internal predecessors, (8749), 857 states have call successors, (857), 31 states have call predecessors, (857), 31 states have return successors, (857), 847 states have call predecessors, (857), 857 states have call successors, (857) [2023-11-06 22:43:30,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5942 states to 5942 states and 10463 transitions. [2023-11-06 22:43:30,507 INFO L78 Accepts]: Start accepts. Automaton has 5942 states and 10463 transitions. Word has length 724 [2023-11-06 22:43:30,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:43:30,508 INFO L495 AbstractCegarLoop]: Abstraction has 5942 states and 10463 transitions. [2023-11-06 22:43:30,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.0) internal successors, (152), 3 states have internal predecessors, (152), 1 states have call successors, (115), 1 states have call predecessors, (115), 1 states have return successors, (115), 1 states have call predecessors, (115), 1 states have call successors, (115) [2023-11-06 22:43:30,509 INFO L276 IsEmpty]: Start isEmpty. Operand 5942 states and 10463 transitions. [2023-11-06 22:43:30,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 725 [2023-11-06 22:43:30,526 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:43:30,526 INFO L195 NwaCegarLoop]: trace histogram [115, 115, 115, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:43:30,543 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89f3e463-973e-412c-b2f7-1268382b82d1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-06 22:43:30,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89f3e463-973e-412c-b2f7-1268382b82d1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:43:30,738 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:43:30,738 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:43:30,739 INFO L85 PathProgramCache]: Analyzing trace with hash 1691119183, now seen corresponding path program 1 times [2023-11-06 22:43:30,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:43:30,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689423653] [2023-11-06 22:43:30,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:43:30,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:43:30,841 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:43:30,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [909040586] [2023-11-06 22:43:30,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:43:30,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:43:30,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89f3e463-973e-412c-b2f7-1268382b82d1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:43:30,843 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89f3e463-973e-412c-b2f7-1268382b82d1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:43:30,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89f3e463-973e-412c-b2f7-1268382b82d1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-06 22:43:31,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:43:31,774 INFO L262 TraceCheckSpWp]: Trace formula consists of 1688 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-06 22:43:31,789 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:43:35,007 INFO L134 CoverageAnalysis]: Checked inductivity of 26220 backedges. 4839 proven. 618 refuted. 0 times theorem prover too weak. 20763 trivial. 0 not checked. [2023-11-06 22:43:35,007 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:43:35,465 INFO L134 CoverageAnalysis]: Checked inductivity of 26220 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26220 trivial. 0 not checked. [2023-11-06 22:43:35,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:43:35,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689423653] [2023-11-06 22:43:35,466 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:43:35,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909040586] [2023-11-06 22:43:35,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909040586] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 22:43:35,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:43:35,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10] total 12 [2023-11-06 22:43:35,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958790642] [2023-11-06 22:43:35,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:43:35,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:43:35,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:43:35,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:43:35,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:43:35,475 INFO L87 Difference]: Start difference. First operand 5942 states and 10463 transitions. Second operand has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 1 states have call successors, (115), 1 states have call predecessors, (115), 1 states have return successors, (115), 1 states have call predecessors, (115), 1 states have call successors, (115) [2023-11-06 22:43:36,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:43:36,924 INFO L93 Difference]: Finished difference Result 12738 states and 22051 transitions. [2023-11-06 22:43:36,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:43:36,925 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 1 states have call successors, (115), 1 states have call predecessors, (115), 1 states have return successors, (115), 1 states have call predecessors, (115), 1 states have call successors, (115) Word has length 724 [2023-11-06 22:43:36,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:43:36,964 INFO L225 Difference]: With dead ends: 12738 [2023-11-06 22:43:36,965 INFO L226 Difference]: Without dead ends: 8708 [2023-11-06 22:43:36,980 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1446 GetRequests, 1436 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:43:36,981 INFO L413 NwaCegarLoop]: 957 mSDtfsCounter, 1146 mSDsluCounter, 603 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 237 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1146 SdHoareTripleChecker+Valid, 1560 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 237 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-06 22:43:36,982 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1146 Valid, 1560 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [237 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-06 22:43:36,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8708 states. [2023-11-06 22:43:38,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8708 to 7862. [2023-11-06 22:43:38,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7862 states, 6195 states have (on average 1.660855528652139) internal successors, (10289), 6217 states have internal predecessors, (10289), 1599 states have call successors, (1599), 67 states have call predecessors, (1599), 67 states have return successors, (1599), 1577 states have call predecessors, (1599), 1599 states have call successors, (1599) [2023-11-06 22:43:38,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7862 states to 7862 states and 13487 transitions. [2023-11-06 22:43:38,448 INFO L78 Accepts]: Start accepts. Automaton has 7862 states and 13487 transitions. Word has length 724 [2023-11-06 22:43:38,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:43:38,450 INFO L495 AbstractCegarLoop]: Abstraction has 7862 states and 13487 transitions. [2023-11-06 22:43:38,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 1 states have call successors, (115), 1 states have call predecessors, (115), 1 states have return successors, (115), 1 states have call predecessors, (115), 1 states have call successors, (115) [2023-11-06 22:43:38,450 INFO L276 IsEmpty]: Start isEmpty. Operand 7862 states and 13487 transitions. [2023-11-06 22:43:38,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 726 [2023-11-06 22:43:38,467 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:43:38,536 INFO L195 NwaCegarLoop]: trace histogram [115, 115, 115, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:43:38,549 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89f3e463-973e-412c-b2f7-1268382b82d1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-06 22:43:38,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89f3e463-973e-412c-b2f7-1268382b82d1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:43:38,737 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:43:38,737 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:43:38,738 INFO L85 PathProgramCache]: Analyzing trace with hash -1756237611, now seen corresponding path program 1 times [2023-11-06 22:43:38,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:43:38,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000786903] [2023-11-06 22:43:38,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:43:38,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:43:38,858 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:43:38,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1400812013] [2023-11-06 22:43:38,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:43:38,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:43:38,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89f3e463-973e-412c-b2f7-1268382b82d1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:43:38,860 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89f3e463-973e-412c-b2f7-1268382b82d1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:43:38,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89f3e463-973e-412c-b2f7-1268382b82d1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-06 22:43:39,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:43:39,618 INFO L262 TraceCheckSpWp]: Trace formula consists of 1692 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:43:39,630 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:43:40,129 INFO L134 CoverageAnalysis]: Checked inductivity of 26220 backedges. 12762 proven. 138 refuted. 0 times theorem prover too weak. 13320 trivial. 0 not checked. [2023-11-06 22:43:40,129 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:43:40,592 INFO L134 CoverageAnalysis]: Checked inductivity of 26220 backedges. 204 proven. 138 refuted. 0 times theorem prover too weak. 25878 trivial. 0 not checked. [2023-11-06 22:43:40,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:43:40,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000786903] [2023-11-06 22:43:40,592 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:43:40,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400812013] [2023-11-06 22:43:40,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400812013] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:43:40,593 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:43:40,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-06 22:43:40,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943417116] [2023-11-06 22:43:40,594 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:43:40,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:43:40,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:43:40,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:43:40,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:43:40,598 INFO L87 Difference]: Start difference. First operand 7862 states and 13487 transitions. Second operand has 7 states, 7 states have (on average 23.142857142857142) internal successors, (162), 7 states have internal predecessors, (162), 2 states have call successors, (161), 2 states have call predecessors, (161), 4 states have return successors, (162), 2 states have call predecessors, (162), 2 states have call successors, (162) [2023-11-06 22:43:42,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:43:42,708 INFO L93 Difference]: Finished difference Result 13814 states and 23449 transitions. [2023-11-06 22:43:42,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 22:43:42,709 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 23.142857142857142) internal successors, (162), 7 states have internal predecessors, (162), 2 states have call successors, (161), 2 states have call predecessors, (161), 4 states have return successors, (162), 2 states have call predecessors, (162), 2 states have call successors, (162) Word has length 725 [2023-11-06 22:43:42,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:43:42,743 INFO L225 Difference]: With dead ends: 13814 [2023-11-06 22:43:42,743 INFO L226 Difference]: Without dead ends: 7944 [2023-11-06 22:43:42,764 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1452 GetRequests, 1442 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 22:43:42,765 INFO L413 NwaCegarLoop]: 561 mSDtfsCounter, 361 mSDsluCounter, 906 mSDsCounter, 0 mSdLazyCounter, 1121 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 429 SdHoareTripleChecker+Valid, 1467 SdHoareTripleChecker+Invalid, 1140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:43:42,766 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [429 Valid, 1467 Invalid, 1140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1121 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-06 22:43:42,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7944 states. [2023-11-06 22:43:43,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7944 to 7858. [2023-11-06 22:43:43,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7858 states, 6186 states have (on average 1.65696734561914) internal successors, (10250), 6208 states have internal predecessors, (10250), 1599 states have call successors, (1599), 72 states have call predecessors, (1599), 72 states have return successors, (1599), 1577 states have call predecessors, (1599), 1599 states have call successors, (1599) [2023-11-06 22:43:44,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7858 states to 7858 states and 13448 transitions. [2023-11-06 22:43:44,020 INFO L78 Accepts]: Start accepts. Automaton has 7858 states and 13448 transitions. Word has length 725 [2023-11-06 22:43:44,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:43:44,022 INFO L495 AbstractCegarLoop]: Abstraction has 7858 states and 13448 transitions. [2023-11-06 22:43:44,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.142857142857142) internal successors, (162), 7 states have internal predecessors, (162), 2 states have call successors, (161), 2 states have call predecessors, (161), 4 states have return successors, (162), 2 states have call predecessors, (162), 2 states have call successors, (162) [2023-11-06 22:43:44,022 INFO L276 IsEmpty]: Start isEmpty. Operand 7858 states and 13448 transitions. [2023-11-06 22:43:44,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 726 [2023-11-06 22:43:44,040 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:43:44,040 INFO L195 NwaCegarLoop]: trace histogram [115, 115, 115, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:43:44,057 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89f3e463-973e-412c-b2f7-1268382b82d1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-06 22:43:44,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89f3e463-973e-412c-b2f7-1268382b82d1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-06 22:43:44,257 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:43:44,258 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:43:44,258 INFO L85 PathProgramCache]: Analyzing trace with hash 1965182492, now seen corresponding path program 1 times [2023-11-06 22:43:44,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:43:44,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857987170] [2023-11-06 22:43:44,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:43:44,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:43:44,364 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:43:44,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [85787854] [2023-11-06 22:43:44,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:43:44,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:43:44,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89f3e463-973e-412c-b2f7-1268382b82d1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:43:44,366 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89f3e463-973e-412c-b2f7-1268382b82d1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:43:44,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89f3e463-973e-412c-b2f7-1268382b82d1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-06 22:43:45,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:43:45,376 INFO L262 TraceCheckSpWp]: Trace formula consists of 1690 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-06 22:43:45,395 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:43:49,674 INFO L134 CoverageAnalysis]: Checked inductivity of 26220 backedges. 19635 proven. 732 refuted. 0 times theorem prover too weak. 5853 trivial. 0 not checked. [2023-11-06 22:43:49,675 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:43:53,310 INFO L134 CoverageAnalysis]: Checked inductivity of 26220 backedges. 918 proven. 762 refuted. 0 times theorem prover too weak. 24540 trivial. 0 not checked. [2023-11-06 22:43:53,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:43:53,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857987170] [2023-11-06 22:43:53,310 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:43:53,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85787854] [2023-11-06 22:43:53,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85787854] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:43:53,311 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:43:53,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 37 [2023-11-06 22:43:53,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043211093] [2023-11-06 22:43:53,312 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:43:53,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-11-06 22:43:53,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:43:53,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-11-06 22:43:53,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=308, Invalid=1024, Unknown=0, NotChecked=0, Total=1332 [2023-11-06 22:43:53,319 INFO L87 Difference]: Start difference. First operand 7858 states and 13448 transitions. Second operand has 37 states, 36 states have (on average 7.722222222222222) internal successors, (278), 35 states have internal predecessors, (278), 10 states have call successors, (193), 6 states have call predecessors, (193), 15 states have return successors, (194), 10 states have call predecessors, (194), 10 states have call successors, (194) [2023-11-06 22:44:17,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:44:17,869 INFO L93 Difference]: Finished difference Result 38462 states and 64211 transitions. [2023-11-06 22:44:17,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2023-11-06 22:44:17,870 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 7.722222222222222) internal successors, (278), 35 states have internal predecessors, (278), 10 states have call successors, (193), 6 states have call predecessors, (193), 15 states have return successors, (194), 10 states have call predecessors, (194), 10 states have call successors, (194) Word has length 725 [2023-11-06 22:44:17,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:44:17,995 INFO L225 Difference]: With dead ends: 38462 [2023-11-06 22:44:17,995 INFO L226 Difference]: Without dead ends: 30832 [2023-11-06 22:44:18,040 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1595 GetRequests, 1423 SyntacticMatches, 0 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11426 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=6112, Invalid=23990, Unknown=0, NotChecked=0, Total=30102 [2023-11-06 22:44:18,041 INFO L413 NwaCegarLoop]: 606 mSDtfsCounter, 3896 mSDsluCounter, 4507 mSDsCounter, 0 mSdLazyCounter, 5961 mSolverCounterSat, 2435 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3933 SdHoareTripleChecker+Valid, 5113 SdHoareTripleChecker+Invalid, 8396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2435 IncrementalHoareTripleChecker+Valid, 5961 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.4s IncrementalHoareTripleChecker+Time [2023-11-06 22:44:18,041 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3933 Valid, 5113 Invalid, 8396 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2435 Valid, 5961 Invalid, 0 Unknown, 0 Unchecked, 10.4s Time] [2023-11-06 22:44:18,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30832 states. [2023-11-06 22:44:21,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30832 to 14910. [2023-11-06 22:44:21,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14910 states, 12978 states have (on average 1.7424872861766065) internal successors, (22614), 13008 states have internal predecessors, (22614), 1809 states have call successors, (1809), 122 states have call predecessors, (1809), 122 states have return successors, (1809), 1779 states have call predecessors, (1809), 1809 states have call successors, (1809) [2023-11-06 22:44:21,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14910 states to 14910 states and 26232 transitions. [2023-11-06 22:44:21,209 INFO L78 Accepts]: Start accepts. Automaton has 14910 states and 26232 transitions. Word has length 725 [2023-11-06 22:44:21,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:44:21,211 INFO L495 AbstractCegarLoop]: Abstraction has 14910 states and 26232 transitions. [2023-11-06 22:44:21,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 7.722222222222222) internal successors, (278), 35 states have internal predecessors, (278), 10 states have call successors, (193), 6 states have call predecessors, (193), 15 states have return successors, (194), 10 states have call predecessors, (194), 10 states have call successors, (194) [2023-11-06 22:44:21,212 INFO L276 IsEmpty]: Start isEmpty. Operand 14910 states and 26232 transitions. [2023-11-06 22:44:21,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 726 [2023-11-06 22:44:21,252 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:44:21,253 INFO L195 NwaCegarLoop]: trace histogram [115, 115, 115, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:44:21,271 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89f3e463-973e-412c-b2f7-1268382b82d1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-06 22:44:21,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89f3e463-973e-412c-b2f7-1268382b82d1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:44:21,465 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:44:21,466 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:44:21,466 INFO L85 PathProgramCache]: Analyzing trace with hash 1472556318, now seen corresponding path program 1 times [2023-11-06 22:44:21,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:44:21,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287790240] [2023-11-06 22:44:21,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:44:21,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:44:21,579 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:44:21,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1193813349] [2023-11-06 22:44:21,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:44:21,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:44:21,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89f3e463-973e-412c-b2f7-1268382b82d1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:44:21,581 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89f3e463-973e-412c-b2f7-1268382b82d1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:44:21,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89f3e463-973e-412c-b2f7-1268382b82d1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-06 22:44:22,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:44:22,631 INFO L262 TraceCheckSpWp]: Trace formula consists of 1690 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-06 22:44:22,650 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:44:27,890 INFO L134 CoverageAnalysis]: Checked inductivity of 26220 backedges. 16784 proven. 828 refuted. 0 times theorem prover too weak. 8608 trivial. 0 not checked. [2023-11-06 22:44:27,890 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:44:35,115 INFO L134 CoverageAnalysis]: Checked inductivity of 26220 backedges. 1134 proven. 873 refuted. 0 times theorem prover too weak. 24213 trivial. 0 not checked. [2023-11-06 22:44:35,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:44:35,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287790240] [2023-11-06 22:44:35,116 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:44:35,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193813349] [2023-11-06 22:44:35,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193813349] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:44:35,116 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:44:35,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 44 [2023-11-06 22:44:35,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812559746] [2023-11-06 22:44:35,118 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:44:35,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-11-06 22:44:35,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:44:35,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-11-06 22:44:35,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=1422, Unknown=0, NotChecked=0, Total=1892 [2023-11-06 22:44:35,124 INFO L87 Difference]: Start difference. First operand 14910 states and 26232 transitions. Second operand has 44 states, 42 states have (on average 6.690476190476191) internal successors, (281), 40 states have internal predecessors, (281), 13 states have call successors, (174), 7 states have call predecessors, (174), 16 states have return successors, (175), 13 states have call predecessors, (175), 13 states have call successors, (175) [2023-11-06 22:44:46,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:44:46,628 INFO L93 Difference]: Finished difference Result 31764 states and 53644 transitions. [2023-11-06 22:44:46,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-11-06 22:44:46,629 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 42 states have (on average 6.690476190476191) internal successors, (281), 40 states have internal predecessors, (281), 13 states have call successors, (174), 7 states have call predecessors, (174), 16 states have return successors, (175), 13 states have call predecessors, (175), 13 states have call successors, (175) Word has length 725 [2023-11-06 22:44:46,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:44:46,709 INFO L225 Difference]: With dead ends: 31764 [2023-11-06 22:44:46,709 INFO L226 Difference]: Without dead ends: 23272 [2023-11-06 22:44:46,734 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1485 GetRequests, 1410 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1493 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1795, Invalid=4057, Unknown=0, NotChecked=0, Total=5852 [2023-11-06 22:44:46,735 INFO L413 NwaCegarLoop]: 498 mSDtfsCounter, 3361 mSDsluCounter, 2804 mSDsCounter, 0 mSdLazyCounter, 3751 mSolverCounterSat, 1244 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3415 SdHoareTripleChecker+Valid, 3302 SdHoareTripleChecker+Invalid, 4995 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1244 IncrementalHoareTripleChecker+Valid, 3751 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:44:46,735 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3415 Valid, 3302 Invalid, 4995 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1244 Valid, 3751 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2023-11-06 22:44:46,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23272 states. [2023-11-06 22:44:49,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23272 to 12400. [2023-11-06 22:44:49,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12400 states, 10458 states have (on average 1.6955440810862497) internal successors, (17732), 10488 states have internal predecessors, (17732), 1809 states have call successors, (1809), 132 states have call predecessors, (1809), 132 states have return successors, (1809), 1779 states have call predecessors, (1809), 1809 states have call successors, (1809) [2023-11-06 22:44:49,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12400 states to 12400 states and 21350 transitions. [2023-11-06 22:44:49,451 INFO L78 Accepts]: Start accepts. Automaton has 12400 states and 21350 transitions. Word has length 725 [2023-11-06 22:44:49,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:44:49,452 INFO L495 AbstractCegarLoop]: Abstraction has 12400 states and 21350 transitions. [2023-11-06 22:44:49,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 42 states have (on average 6.690476190476191) internal successors, (281), 40 states have internal predecessors, (281), 13 states have call successors, (174), 7 states have call predecessors, (174), 16 states have return successors, (175), 13 states have call predecessors, (175), 13 states have call successors, (175) [2023-11-06 22:44:49,453 INFO L276 IsEmpty]: Start isEmpty. Operand 12400 states and 21350 transitions. [2023-11-06 22:44:49,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 727 [2023-11-06 22:44:49,474 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:44:49,475 INFO L195 NwaCegarLoop]: trace histogram [115, 115, 115, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:44:49,487 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89f3e463-973e-412c-b2f7-1268382b82d1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-06 22:44:49,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89f3e463-973e-412c-b2f7-1268382b82d1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-06 22:44:49,687 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:44:49,687 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:44:49,688 INFO L85 PathProgramCache]: Analyzing trace with hash 1277321308, now seen corresponding path program 1 times [2023-11-06 22:44:49,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:44:49,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914862017] [2023-11-06 22:44:49,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:44:49,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:44:49,811 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:44:49,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [41629534] [2023-11-06 22:44:49,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:44:49,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:44:49,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89f3e463-973e-412c-b2f7-1268382b82d1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:44:49,814 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89f3e463-973e-412c-b2f7-1268382b82d1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:44:49,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89f3e463-973e-412c-b2f7-1268382b82d1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-06 22:44:50,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:44:50,935 INFO L262 TraceCheckSpWp]: Trace formula consists of 1695 conjuncts, 44 conjunts are in the unsatisfiable core [2023-11-06 22:44:50,954 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:44:56,589 INFO L134 CoverageAnalysis]: Checked inductivity of 26220 backedges. 20405 proven. 903 refuted. 0 times theorem prover too weak. 4912 trivial. 0 not checked. [2023-11-06 22:44:56,589 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:45:02,430 INFO L134 CoverageAnalysis]: Checked inductivity of 26220 backedges. 1221 proven. 786 refuted. 0 times theorem prover too weak. 24213 trivial. 0 not checked. [2023-11-06 22:45:02,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:45:02,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914862017] [2023-11-06 22:45:02,430 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:45:02,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41629534] [2023-11-06 22:45:02,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41629534] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:45:02,431 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:45:02,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 50 [2023-11-06 22:45:02,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999930483] [2023-11-06 22:45:02,432 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:45:02,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-11-06 22:45:02,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:45:02,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-11-06 22:45:02,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=556, Invalid=1894, Unknown=0, NotChecked=0, Total=2450 [2023-11-06 22:45:02,437 INFO L87 Difference]: Start difference. First operand 12400 states and 21350 transitions. Second operand has 50 states, 48 states have (on average 6.104166666666667) internal successors, (293), 46 states have internal predecessors, (293), 14 states have call successors, (193), 8 states have call predecessors, (193), 19 states have return successors, (194), 14 states have call predecessors, (194), 14 states have call successors, (194) [2023-11-06 22:45:27,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:45:27,063 INFO L93 Difference]: Finished difference Result 27912 states and 46991 transitions. [2023-11-06 22:45:27,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2023-11-06 22:45:27,064 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 48 states have (on average 6.104166666666667) internal successors, (293), 46 states have internal predecessors, (293), 14 states have call successors, (193), 8 states have call predecessors, (193), 19 states have return successors, (194), 14 states have call predecessors, (194), 14 states have call successors, (194) Word has length 726 [2023-11-06 22:45:27,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:45:27,121 INFO L225 Difference]: With dead ends: 27912 [2023-11-06 22:45:27,121 INFO L226 Difference]: Without dead ends: 17308 [2023-11-06 22:45:27,147 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1584 GetRequests, 1411 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10951 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=6066, Invalid=24384, Unknown=0, NotChecked=0, Total=30450 [2023-11-06 22:45:27,148 INFO L413 NwaCegarLoop]: 572 mSDtfsCounter, 7186 mSDsluCounter, 3818 mSDsCounter, 0 mSdLazyCounter, 6196 mSolverCounterSat, 3103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7220 SdHoareTripleChecker+Valid, 4390 SdHoareTripleChecker+Invalid, 9299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3103 IncrementalHoareTripleChecker+Valid, 6196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:45:27,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7220 Valid, 4390 Invalid, 9299 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3103 Valid, 6196 Invalid, 0 Unknown, 0 Unchecked, 10.2s Time] [2023-11-06 22:45:27,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17308 states. [2023-11-06 22:45:28,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17308 to 6396. [2023-11-06 22:45:28,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6396 states, 5238 states have (on average 1.6433753340969837) internal successors, (8608), 5252 states have internal predecessors, (8608), 1057 states have call successors, (1057), 100 states have call predecessors, (1057), 100 states have return successors, (1057), 1043 states have call predecessors, (1057), 1057 states have call successors, (1057) [2023-11-06 22:45:28,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6396 states to 6396 states and 10722 transitions. [2023-11-06 22:45:28,985 INFO L78 Accepts]: Start accepts. Automaton has 6396 states and 10722 transitions. Word has length 726 [2023-11-06 22:45:28,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:45:28,986 INFO L495 AbstractCegarLoop]: Abstraction has 6396 states and 10722 transitions. [2023-11-06 22:45:28,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 48 states have (on average 6.104166666666667) internal successors, (293), 46 states have internal predecessors, (293), 14 states have call successors, (193), 8 states have call predecessors, (193), 19 states have return successors, (194), 14 states have call predecessors, (194), 14 states have call successors, (194) [2023-11-06 22:45:28,987 INFO L276 IsEmpty]: Start isEmpty. Operand 6396 states and 10722 transitions. [2023-11-06 22:45:28,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 727 [2023-11-06 22:45:28,999 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:45:28,999 INFO L195 NwaCegarLoop]: trace histogram [115, 115, 115, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:45:29,010 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89f3e463-973e-412c-b2f7-1268382b82d1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-06 22:45:29,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89f3e463-973e-412c-b2f7-1268382b82d1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-06 22:45:29,210 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:45:29,210 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:45:29,211 INFO L85 PathProgramCache]: Analyzing trace with hash 767848218, now seen corresponding path program 1 times [2023-11-06 22:45:29,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:45:29,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565033867] [2023-11-06 22:45:29,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:45:29,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:45:29,319 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:45:29,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [104032147] [2023-11-06 22:45:29,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:45:29,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:45:29,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89f3e463-973e-412c-b2f7-1268382b82d1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:45:29,322 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89f3e463-973e-412c-b2f7-1268382b82d1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:45:29,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89f3e463-973e-412c-b2f7-1268382b82d1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-06 22:45:30,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:45:30,424 INFO L262 TraceCheckSpWp]: Trace formula consists of 1695 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-06 22:45:30,444 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:45:34,715 INFO L134 CoverageAnalysis]: Checked inductivity of 26220 backedges. 13121 proven. 687 refuted. 0 times theorem prover too weak. 12412 trivial. 0 not checked. [2023-11-06 22:45:34,715 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:45:37,358 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse3 (mod c_~var_1_43~0 256))) (or (let ((.cse5 (+ c_~var_1_35~0 1))) (let ((.cse1 (+ c_~var_1_34~0 c_~var_1_35~0 1)) (.cse0 (< 0 .cse5)) (.cse2 (forall ((|v_ULTIMATE.start_step_#t~nondet8#1_39| Int)) (or (< |v_ULTIMATE.start_step_#t~nondet8#1_39| .cse3) (not (= (mod |v_ULTIMATE.start_step_#t~nondet8#1_39| c_~var_1_34~0) 0)))))) (and (or .cse0 (< 0 .cse1) .cse2) (forall ((|v_ULTIMATE.start_step_#t~nondet8#1_39| Int)) (let ((.cse4 (mod |v_ULTIMATE.start_step_#t~nondet8#1_39| c_~var_1_34~0))) (or (< |v_ULTIMATE.start_step_#t~nondet8#1_39| .cse3) (< .cse4 .cse5) (< .cse4 .cse1)))) (forall ((|v_ULTIMATE.start_step_#t~nondet8#1_39| Int)) (let ((.cse6 (mod |v_ULTIMATE.start_step_#t~nondet8#1_39| c_~var_1_34~0))) (or (< |v_ULTIMATE.start_step_#t~nondet8#1_39| .cse3) (< .cse6 .cse1) (< (+ c_~var_1_34~0 .cse6) .cse5)))) (forall ((|v_ULTIMATE.start_step_#t~nondet8#1_39| Int)) (or (< |v_ULTIMATE.start_step_#t~nondet8#1_39| .cse3) (< (mod |v_ULTIMATE.start_step_#t~nondet8#1_39| c_~var_1_34~0) .cse5))) (or .cse0 .cse2)))) (and (not (= c_~var_1_24~0 0)) (not (= .cse3 c_~var_1_24~0))) (< (mod c_~var_1_41~0 256) c_~var_1_26~0))) is different from false [2023-11-06 22:45:47,437 INFO L134 CoverageAnalysis]: Checked inductivity of 26220 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26220 trivial. 0 not checked. [2023-11-06 22:45:47,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:45:47,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565033867] [2023-11-06 22:45:47,437 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:45:47,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104032147] [2023-11-06 22:45:47,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104032147] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 22:45:47,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:45:47,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [13] total 21 [2023-11-06 22:45:47,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248422237] [2023-11-06 22:45:47,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:45:47,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 22:45:47,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:45:47,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 22:45:47,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=303, Unknown=1, NotChecked=36, Total=420 [2023-11-06 22:45:47,442 INFO L87 Difference]: Start difference. First operand 6396 states and 10722 transitions. Second operand has 10 states, 10 states have (on average 15.4) internal successors, (154), 10 states have internal predecessors, (154), 1 states have call successors, (115), 1 states have call predecessors, (115), 1 states have return successors, (115), 1 states have call predecessors, (115), 1 states have call successors, (115) [2023-11-06 22:45:53,742 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-11-06 22:45:56,205 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-11-06 22:45:58,397 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1]