./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-5.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f75ce01-31bb-4ccc-86e1-5fafded5f15c/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f75ce01-31bb-4ccc-86e1-5fafded5f15c/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_1f75ce01-31bb-4ccc-86e1-5fafded5f15c/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f75ce01-31bb-4ccc-86e1-5fafded5f15c/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-5.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f75ce01-31bb-4ccc-86e1-5fafded5f15c/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_1f75ce01-31bb-4ccc-86e1-5fafded5f15c/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 4639c6b0fb22706997cf521ef330c95d8a0fb320eefb7d80395f3064e0e7914f --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:18:12,941 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:18:13,042 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f75ce01-31bb-4ccc-86e1-5fafded5f15c/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 22:18:13,050 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:18:13,050 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:18:13,094 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:18:13,095 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:18:13,096 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:18:13,097 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:18:13,102 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:18:13,103 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:18:13,104 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:18:13,104 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:18:13,106 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:18:13,106 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 22:18:13,107 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:18:13,107 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:18:13,108 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:18:13,108 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:18:13,108 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 22:18:13,109 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:18:13,109 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 22:18:13,110 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:18:13,110 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 22:18:13,111 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:18:13,112 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:18:13,112 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:18:13,112 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:18:13,113 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:18:13,113 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:18:13,115 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:18:13,115 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 22:18:13,115 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:18:13,115 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:18:13,116 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:18:13,116 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 22:18:13,116 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:18:13,116 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:18:13,117 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:18:13,117 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_1f75ce01-31bb-4ccc-86e1-5fafded5f15c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f75ce01-31bb-4ccc-86e1-5fafded5f15c/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4639c6b0fb22706997cf521ef330c95d8a0fb320eefb7d80395f3064e0e7914f [2023-11-06 22:18:13,430 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:18:13,469 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:18:13,471 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:18:13,472 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:18:13,472 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:18:13,474 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f75ce01-31bb-4ccc-86e1-5fafded5f15c/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-5.i [2023-11-06 22:18:16,575 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:18:16,816 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:18:16,816 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f75ce01-31bb-4ccc-86e1-5fafded5f15c/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-5.i [2023-11-06 22:18:16,830 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f75ce01-31bb-4ccc-86e1-5fafded5f15c/bin/uautomizer-verify-WvqO1wxjHP/data/f05b0a052/0ca421c4ecee436a97642b11959112df/FLAGccce1ad2d [2023-11-06 22:18:16,846 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f75ce01-31bb-4ccc-86e1-5fafded5f15c/bin/uautomizer-verify-WvqO1wxjHP/data/f05b0a052/0ca421c4ecee436a97642b11959112df [2023-11-06 22:18:16,848 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:18:16,850 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:18:16,852 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:18:16,852 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:18:16,857 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:18:16,858 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:18:16" (1/1) ... [2023-11-06 22:18:16,859 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e9e43ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:18:16, skipping insertion in model container [2023-11-06 22:18:16,860 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:18:16" (1/1) ... [2023-11-06 22:18:16,906 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:18:17,074 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_1f75ce01-31bb-4ccc-86e1-5fafded5f15c/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-5.i[915,928] [2023-11-06 22:18:17,250 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:18:17,275 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:18:17,298 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_1f75ce01-31bb-4ccc-86e1-5fafded5f15c/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-5.i[915,928] [2023-11-06 22:18:17,391 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:18:17,410 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:18:17,411 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:18:17 WrapperNode [2023-11-06 22:18:17,411 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:18:17,424 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:18:17,424 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:18:17,425 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:18:17,432 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:18:17" (1/1) ... [2023-11-06 22:18:17,456 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:18:17" (1/1) ... [2023-11-06 22:18:17,619 INFO L138 Inliner]: procedures = 26, calls = 48, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 422 [2023-11-06 22:18:17,620 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:18:17,621 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:18:17,621 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:18:17,621 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:18:17,630 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:18:17" (1/1) ... [2023-11-06 22:18:17,630 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:18:17" (1/1) ... [2023-11-06 22:18:17,655 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:18:17" (1/1) ... [2023-11-06 22:18:17,655 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:18:17" (1/1) ... [2023-11-06 22:18:17,695 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:18:17" (1/1) ... [2023-11-06 22:18:17,714 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:18:17" (1/1) ... [2023-11-06 22:18:17,730 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:18:17" (1/1) ... [2023-11-06 22:18:17,751 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:18:17" (1/1) ... [2023-11-06 22:18:17,767 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:18:17,769 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:18:17,769 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:18:17,769 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:18:17,770 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:18:17" (1/1) ... [2023-11-06 22:18:17,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:18:17,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f75ce01-31bb-4ccc-86e1-5fafded5f15c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:18:17,813 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f75ce01-31bb-4ccc-86e1-5fafded5f15c/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:18:17,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f75ce01-31bb-4ccc-86e1-5fafded5f15c/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:18:17,861 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:18:17,861 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-06 22:18:17,861 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-06 22:18:17,861 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:18:17,862 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:18:17,862 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:18:18,005 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:18:18,007 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:18:18,958 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:18:18,973 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:18:18,973 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-06 22:18:18,976 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:18:18 BoogieIcfgContainer [2023-11-06 22:18:18,976 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:18:18,981 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:18:18,981 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:18:18,987 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:18:18,987 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:18:16" (1/3) ... [2023-11-06 22:18:18,988 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e8eb6fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:18:18, skipping insertion in model container [2023-11-06 22:18:18,988 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:18:17" (2/3) ... [2023-11-06 22:18:18,990 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e8eb6fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:18:18, skipping insertion in model container [2023-11-06 22:18:18,991 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:18:18" (3/3) ... [2023-11-06 22:18:18,992 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_operatoramount_amount250_file-5.i [2023-11-06 22:18:19,013 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:18:19,014 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 22:18:19,092 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:18:19,100 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;@4b09210d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:18:19,100 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-06 22:18:19,105 INFO L276 IsEmpty]: Start isEmpty. Operand has 161 states, 123 states have (on average 1.5772357723577235) internal successors, (194), 124 states have internal predecessors, (194), 35 states have call successors, (35), 1 states have call predecessors, (35), 1 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2023-11-06 22:18:19,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2023-11-06 22:18:19,128 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:18:19,130 INFO L195 NwaCegarLoop]: trace histogram [35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:18:19,130 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:18:19,137 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:18:19,137 INFO L85 PathProgramCache]: Analyzing trace with hash -642302352, now seen corresponding path program 1 times [2023-11-06 22:18:19,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:18:19,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047816419] [2023-11-06 22:18:19,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:19,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:18:19,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:19,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:18:19,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047816419] [2023-11-06 22:18:19,447 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-06 22:18:19,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330228472] [2023-11-06 22:18:19,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:19,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:18:19,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f75ce01-31bb-4ccc-86e1-5fafded5f15c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:18:19,454 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f75ce01-31bb-4ccc-86e1-5fafded5f15c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:18:19,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f75ce01-31bb-4ccc-86e1-5fafded5f15c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:18:19,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:19,788 INFO L262 TraceCheckSpWp]: Trace formula consists of 634 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-06 22:18:19,802 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:18:19,892 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 2312 trivial. 0 not checked. [2023-11-06 22:18:19,893 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:18:19,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330228472] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:18:19,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:18:19,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:18:19,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87848643] [2023-11-06 22:18:19,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:18:19,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-06 22:18:19,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:18:19,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-06 22:18:19,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 22:18:19,961 INFO L87 Difference]: Start difference. First operand has 161 states, 123 states have (on average 1.5772357723577235) internal successors, (194), 124 states have internal predecessors, (194), 35 states have call successors, (35), 1 states have call predecessors, (35), 1 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) Second operand has 2 states, 2 states have (on average 39.5) internal successors, (79), 2 states have internal predecessors, (79), 2 states have call successors, (35), 2 states have call predecessors, (35), 1 states have return successors, (35), 1 states have call predecessors, (35), 2 states have call successors, (35) [2023-11-06 22:18:20,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:18:20,031 INFO L93 Difference]: Finished difference Result 315 states and 557 transitions. [2023-11-06 22:18:20,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-06 22:18:20,033 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 39.5) internal successors, (79), 2 states have internal predecessors, (79), 2 states have call successors, (35), 2 states have call predecessors, (35), 1 states have return successors, (35), 1 states have call predecessors, (35), 2 states have call successors, (35) Word has length 249 [2023-11-06 22:18:20,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:18:20,044 INFO L225 Difference]: With dead ends: 315 [2023-11-06 22:18:20,044 INFO L226 Difference]: Without dead ends: 157 [2023-11-06 22:18:20,049 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 248 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 22:18:20,052 INFO L413 NwaCegarLoop]: 255 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, 255 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 22:18:20,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:18:20,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2023-11-06 22:18:20,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2023-11-06 22:18:20,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 120 states have (on average 1.5416666666666667) internal successors, (185), 120 states have internal predecessors, (185), 35 states have call successors, (35), 1 states have call predecessors, (35), 1 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2023-11-06 22:18:20,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 255 transitions. [2023-11-06 22:18:20,122 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 255 transitions. Word has length 249 [2023-11-06 22:18:20,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:18:20,123 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 255 transitions. [2023-11-06 22:18:20,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 39.5) internal successors, (79), 2 states have internal predecessors, (79), 2 states have call successors, (35), 2 states have call predecessors, (35), 1 states have return successors, (35), 1 states have call predecessors, (35), 2 states have call successors, (35) [2023-11-06 22:18:20,124 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 255 transitions. [2023-11-06 22:18:20,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2023-11-06 22:18:20,131 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:18:20,132 INFO L195 NwaCegarLoop]: trace histogram [35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:18:20,140 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f75ce01-31bb-4ccc-86e1-5fafded5f15c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-06 22:18:20,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f75ce01-31bb-4ccc-86e1-5fafded5f15c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:18:20,333 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:18:20,334 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:18:20,334 INFO L85 PathProgramCache]: Analyzing trace with hash 1762997012, now seen corresponding path program 1 times [2023-11-06 22:18:20,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:18:20,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263802767] [2023-11-06 22:18:20,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:20,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:18:20,499 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:18:20,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1147086654] [2023-11-06 22:18:20,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:20,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:18:20,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f75ce01-31bb-4ccc-86e1-5fafded5f15c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:18:20,510 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f75ce01-31bb-4ccc-86e1-5fafded5f15c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:18:20,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f75ce01-31bb-4ccc-86e1-5fafded5f15c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 22:18:20,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:20,782 INFO L262 TraceCheckSpWp]: Trace formula consists of 634 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:18:20,792 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:18:21,916 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2380 trivial. 0 not checked. [2023-11-06 22:18:21,916 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:18:21,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:18:21,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263802767] [2023-11-06 22:18:21,920 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:18:21,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147086654] [2023-11-06 22:18:21,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147086654] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:18:21,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:18:21,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:18:21,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278639443] [2023-11-06 22:18:21,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:18:21,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:18:21,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:18:21,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:18:21,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:18:21,928 INFO L87 Difference]: Start difference. First operand 157 states and 255 transitions. Second operand has 5 states, 5 states have (on average 15.4) internal successors, (77), 4 states have internal predecessors, (77), 1 states have call successors, (35), 1 states have call predecessors, (35), 1 states have return successors, (35), 1 states have call predecessors, (35), 1 states have call successors, (35) [2023-11-06 22:18:22,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:18:22,411 INFO L93 Difference]: Finished difference Result 520 states and 857 transitions. [2023-11-06 22:18:22,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:18:22,412 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 4 states have internal predecessors, (77), 1 states have call successors, (35), 1 states have call predecessors, (35), 1 states have return successors, (35), 1 states have call predecessors, (35), 1 states have call successors, (35) Word has length 249 [2023-11-06 22:18:22,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:18:22,419 INFO L225 Difference]: With dead ends: 520 [2023-11-06 22:18:22,420 INFO L226 Difference]: Without dead ends: 366 [2023-11-06 22:18:22,422 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 245 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:18:22,423 INFO L413 NwaCegarLoop]: 335 mSDtfsCounter, 366 mSDsluCounter, 653 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 366 SdHoareTripleChecker+Valid, 988 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 22:18:22,424 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [366 Valid, 988 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 22:18:22,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2023-11-06 22:18:22,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 235. [2023-11-06 22:18:22,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 162 states have (on average 1.4567901234567902) internal successors, (236), 162 states have internal predecessors, (236), 70 states have call successors, (70), 2 states have call predecessors, (70), 2 states have return successors, (70), 70 states have call predecessors, (70), 70 states have call successors, (70) [2023-11-06 22:18:22,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 376 transitions. [2023-11-06 22:18:22,475 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 376 transitions. Word has length 249 [2023-11-06 22:18:22,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:18:22,477 INFO L495 AbstractCegarLoop]: Abstraction has 235 states and 376 transitions. [2023-11-06 22:18:22,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 4 states have internal predecessors, (77), 1 states have call successors, (35), 1 states have call predecessors, (35), 1 states have return successors, (35), 1 states have call predecessors, (35), 1 states have call successors, (35) [2023-11-06 22:18:22,478 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 376 transitions. [2023-11-06 22:18:22,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2023-11-06 22:18:22,484 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:18:22,485 INFO L195 NwaCegarLoop]: trace histogram [35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:18:22,504 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f75ce01-31bb-4ccc-86e1-5fafded5f15c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-06 22:18:22,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f75ce01-31bb-4ccc-86e1-5fafded5f15c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:18:22,692 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:18:22,693 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:18:22,693 INFO L85 PathProgramCache]: Analyzing trace with hash -1373155300, now seen corresponding path program 1 times [2023-11-06 22:18:22,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:18:22,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172744911] [2023-11-06 22:18:22,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:22,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:18:22,809 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:18:22,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [490410403] [2023-11-06 22:18:22,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:22,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:18:22,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f75ce01-31bb-4ccc-86e1-5fafded5f15c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:18:22,816 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f75ce01-31bb-4ccc-86e1-5fafded5f15c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:18:22,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f75ce01-31bb-4ccc-86e1-5fafded5f15c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 22:18:23,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:23,090 INFO L262 TraceCheckSpWp]: Trace formula consists of 634 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:18:23,102 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:18:23,180 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2380 trivial. 0 not checked. [2023-11-06 22:18:23,186 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:18:23,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:18:23,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172744911] [2023-11-06 22:18:23,187 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:18:23,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490410403] [2023-11-06 22:18:23,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490410403] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:18:23,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:18:23,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:18:23,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897918363] [2023-11-06 22:18:23,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:18:23,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:18:23,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:18:23,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:18:23,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:18:23,193 INFO L87 Difference]: Start difference. First operand 235 states and 376 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 1 states have call successors, (35), 1 states have call predecessors, (35), 1 states have return successors, (35), 1 states have call predecessors, (35), 1 states have call successors, (35) [2023-11-06 22:18:23,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:18:23,756 INFO L93 Difference]: Finished difference Result 727 states and 1165 transitions. [2023-11-06 22:18:23,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:18:23,757 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 1 states have call successors, (35), 1 states have call predecessors, (35), 1 states have return successors, (35), 1 states have call predecessors, (35), 1 states have call successors, (35) Word has length 249 [2023-11-06 22:18:23,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:18:23,764 INFO L225 Difference]: With dead ends: 727 [2023-11-06 22:18:23,765 INFO L226 Difference]: Without dead ends: 573 [2023-11-06 22:18:23,766 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 247 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 22:18:23,767 INFO L413 NwaCegarLoop]: 275 mSDtfsCounter, 536 mSDsluCounter, 464 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 536 SdHoareTripleChecker+Valid, 739 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-06 22:18:23,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [536 Valid, 739 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-06 22:18:23,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2023-11-06 22:18:23,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 415. [2023-11-06 22:18:23,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 322 states have (on average 1.5372670807453417) internal successors, (495), 323 states have internal predecessors, (495), 88 states have call successors, (88), 4 states have call predecessors, (88), 4 states have return successors, (88), 87 states have call predecessors, (88), 88 states have call successors, (88) [2023-11-06 22:18:23,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 671 transitions. [2023-11-06 22:18:23,843 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 671 transitions. Word has length 249 [2023-11-06 22:18:23,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:18:23,845 INFO L495 AbstractCegarLoop]: Abstraction has 415 states and 671 transitions. [2023-11-06 22:18:23,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 1 states have call successors, (35), 1 states have call predecessors, (35), 1 states have return successors, (35), 1 states have call predecessors, (35), 1 states have call successors, (35) [2023-11-06 22:18:23,846 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 671 transitions. [2023-11-06 22:18:23,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2023-11-06 22:18:23,853 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:18:23,854 INFO L195 NwaCegarLoop]: trace histogram [35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:18:23,871 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f75ce01-31bb-4ccc-86e1-5fafded5f15c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 22:18:24,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f75ce01-31bb-4ccc-86e1-5fafded5f15c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:18:24,061 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:18:24,062 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:18:24,062 INFO L85 PathProgramCache]: Analyzing trace with hash 1602258840, now seen corresponding path program 1 times [2023-11-06 22:18:24,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:18:24,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997893614] [2023-11-06 22:18:24,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:24,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:18:24,143 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:18:24,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1696196396] [2023-11-06 22:18:24,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:24,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:18:24,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f75ce01-31bb-4ccc-86e1-5fafded5f15c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:18:24,154 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f75ce01-31bb-4ccc-86e1-5fafded5f15c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:18:24,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f75ce01-31bb-4ccc-86e1-5fafded5f15c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 22:18:24,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:24,430 INFO L262 TraceCheckSpWp]: Trace formula consists of 634 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 22:18:24,437 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:18:25,207 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2380 trivial. 0 not checked. [2023-11-06 22:18:25,207 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:18:25,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:18:25,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997893614] [2023-11-06 22:18:25,208 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:18:25,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696196396] [2023-11-06 22:18:25,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696196396] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:18:25,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:18:25,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 22:18:25,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68588239] [2023-11-06 22:18:25,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:18:25,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:18:25,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:18:25,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:18:25,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:18:25,212 INFO L87 Difference]: Start difference. First operand 415 states and 671 transitions. Second operand has 6 states, 6 states have (on average 13.0) internal successors, (78), 5 states have internal predecessors, (78), 1 states have call successors, (35), 1 states have call predecessors, (35), 1 states have return successors, (35), 1 states have call predecessors, (35), 1 states have call successors, (35) [2023-11-06 22:18:25,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:18:25,518 INFO L93 Difference]: Finished difference Result 969 states and 1594 transitions. [2023-11-06 22:18:25,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:18:25,519 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 5 states have internal predecessors, (78), 1 states have call successors, (35), 1 states have call predecessors, (35), 1 states have return successors, (35), 1 states have call predecessors, (35), 1 states have call successors, (35) Word has length 250 [2023-11-06 22:18:25,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:18:25,527 INFO L225 Difference]: With dead ends: 969 [2023-11-06 22:18:25,527 INFO L226 Difference]: Without dead ends: 632 [2023-11-06 22:18:25,528 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 245 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2023-11-06 22:18:25,533 INFO L413 NwaCegarLoop]: 246 mSDtfsCounter, 438 mSDsluCounter, 715 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 438 SdHoareTripleChecker+Valid, 961 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:18:25,535 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [438 Valid, 961 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 22:18:25,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2023-11-06 22:18:25,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 415. [2023-11-06 22:18:25,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 322 states have (on average 1.531055900621118) internal successors, (493), 323 states have internal predecessors, (493), 88 states have call successors, (88), 4 states have call predecessors, (88), 4 states have return successors, (88), 87 states have call predecessors, (88), 88 states have call successors, (88) [2023-11-06 22:18:25,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 669 transitions. [2023-11-06 22:18:25,604 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 669 transitions. Word has length 250 [2023-11-06 22:18:25,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:18:25,605 INFO L495 AbstractCegarLoop]: Abstraction has 415 states and 669 transitions. [2023-11-06 22:18:25,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 5 states have internal predecessors, (78), 1 states have call successors, (35), 1 states have call predecessors, (35), 1 states have return successors, (35), 1 states have call predecessors, (35), 1 states have call successors, (35) [2023-11-06 22:18:25,605 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 669 transitions. [2023-11-06 22:18:25,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2023-11-06 22:18:25,609 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:18:25,610 INFO L195 NwaCegarLoop]: trace histogram [35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:18:25,622 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f75ce01-31bb-4ccc-86e1-5fafded5f15c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-06 22:18:25,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f75ce01-31bb-4ccc-86e1-5fafded5f15c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:18:25,818 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:18:25,818 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:18:25,819 INFO L85 PathProgramCache]: Analyzing trace with hash 1986106831, now seen corresponding path program 1 times [2023-11-06 22:18:25,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:18:25,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076190107] [2023-11-06 22:18:25,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:25,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:18:25,891 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:18:25,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [282027618] [2023-11-06 22:18:25,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:25,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:18:25,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f75ce01-31bb-4ccc-86e1-5fafded5f15c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:18:25,899 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f75ce01-31bb-4ccc-86e1-5fafded5f15c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:18:25,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f75ce01-31bb-4ccc-86e1-5fafded5f15c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 22:18:26,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:26,210 INFO L262 TraceCheckSpWp]: Trace formula consists of 632 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-06 22:18:26,222 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:18:26,646 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2380 trivial. 0 not checked. [2023-11-06 22:18:26,647 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:18:26,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:18:26,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076190107] [2023-11-06 22:18:26,648 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:18:26,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282027618] [2023-11-06 22:18:26,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282027618] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:18:26,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:18:26,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-06 22:18:26,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662212595] [2023-11-06 22:18:26,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:18:26,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 22:18:26,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:18:26,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 22:18:26,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:18:26,651 INFO L87 Difference]: Start difference. First operand 415 states and 669 transitions. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 7 states have internal predecessors, (79), 1 states have call successors, (35), 1 states have call predecessors, (35), 1 states have return successors, (35), 1 states have call predecessors, (35), 1 states have call successors, (35) [2023-11-06 22:18:27,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:18:27,330 INFO L93 Difference]: Finished difference Result 1253 states and 2074 transitions. [2023-11-06 22:18:27,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 22:18:27,331 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 7 states have internal predecessors, (79), 1 states have call successors, (35), 1 states have call predecessors, (35), 1 states have return successors, (35), 1 states have call predecessors, (35), 1 states have call successors, (35) Word has length 251 [2023-11-06 22:18:27,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:18:27,338 INFO L225 Difference]: With dead ends: 1253 [2023-11-06 22:18:27,338 INFO L226 Difference]: Without dead ends: 923 [2023-11-06 22:18:27,340 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2023-11-06 22:18:27,341 INFO L413 NwaCegarLoop]: 217 mSDtfsCounter, 500 mSDsluCounter, 1087 mSDsCounter, 0 mSdLazyCounter, 464 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 500 SdHoareTripleChecker+Valid, 1304 SdHoareTripleChecker+Invalid, 543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-06 22:18:27,341 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [500 Valid, 1304 Invalid, 543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 464 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-06 22:18:27,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 923 states. [2023-11-06 22:18:27,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 923 to 803. [2023-11-06 22:18:27,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 803 states, 710 states have (on average 1.611267605633803) internal successors, (1144), 711 states have internal predecessors, (1144), 88 states have call successors, (88), 4 states have call predecessors, (88), 4 states have return successors, (88), 87 states have call predecessors, (88), 88 states have call successors, (88) [2023-11-06 22:18:27,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 1320 transitions. [2023-11-06 22:18:27,410 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 1320 transitions. Word has length 251 [2023-11-06 22:18:27,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:18:27,410 INFO L495 AbstractCegarLoop]: Abstraction has 803 states and 1320 transitions. [2023-11-06 22:18:27,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 7 states have internal predecessors, (79), 1 states have call successors, (35), 1 states have call predecessors, (35), 1 states have return successors, (35), 1 states have call predecessors, (35), 1 states have call successors, (35) [2023-11-06 22:18:27,411 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 1320 transitions. [2023-11-06 22:18:27,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2023-11-06 22:18:27,415 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:18:27,416 INFO L195 NwaCegarLoop]: trace histogram [35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:18:27,433 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f75ce01-31bb-4ccc-86e1-5fafded5f15c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 22:18:27,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f75ce01-31bb-4ccc-86e1-5fafded5f15c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:18:27,623 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:18:27,623 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:18:27,624 INFO L85 PathProgramCache]: Analyzing trace with hash 984722946, now seen corresponding path program 1 times [2023-11-06 22:18:27,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:18:27,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885451447] [2023-11-06 22:18:27,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:27,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:18:27,698 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:18:27,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1953912747] [2023-11-06 22:18:27,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:27,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:18:27,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f75ce01-31bb-4ccc-86e1-5fafded5f15c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:18:27,701 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f75ce01-31bb-4ccc-86e1-5fafded5f15c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:18:27,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f75ce01-31bb-4ccc-86e1-5fafded5f15c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 22:18:27,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:27,990 INFO L262 TraceCheckSpWp]: Trace formula consists of 632 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:18:27,996 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:18:28,182 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 1212 proven. 45 refuted. 0 times theorem prover too weak. 1123 trivial. 0 not checked. [2023-11-06 22:18:28,183 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:18:28,407 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 57 proven. 45 refuted. 0 times theorem prover too weak. 2278 trivial. 0 not checked. [2023-11-06 22:18:28,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:18:28,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885451447] [2023-11-06 22:18:28,407 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:18:28,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953912747] [2023-11-06 22:18:28,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953912747] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:18:28,408 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:18:28,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-06 22:18:28,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454731293] [2023-11-06 22:18:28,408 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:18:28,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:18:28,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:18:28,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:18:28,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:18:28,411 INFO L87 Difference]: Start difference. First operand 803 states and 1320 transitions. Second operand has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 2 states have call successors, (50), 2 states have call predecessors, (50), 4 states have return successors, (51), 2 states have call predecessors, (51), 2 states have call successors, (51) [2023-11-06 22:18:28,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:18:28,749 INFO L93 Difference]: Finished difference Result 1349 states and 2200 transitions. [2023-11-06 22:18:28,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 22:18:28,750 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 2 states have call successors, (50), 2 states have call predecessors, (50), 4 states have return successors, (51), 2 states have call predecessors, (51), 2 states have call successors, (51) Word has length 252 [2023-11-06 22:18:28,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:18:28,756 INFO L225 Difference]: With dead ends: 1349 [2023-11-06 22:18:28,756 INFO L226 Difference]: Without dead ends: 664 [2023-11-06 22:18:28,757 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 506 GetRequests, 496 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 22:18:28,758 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 169 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 530 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 22:18:28,759 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 530 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 22:18:28,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2023-11-06 22:18:28,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 652. [2023-11-06 22:18:28,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 652 states, 557 states have (on average 1.5601436265709157) internal successors, (869), 558 states have internal predecessors, (869), 88 states have call successors, (88), 6 states have call predecessors, (88), 6 states have return successors, (88), 87 states have call predecessors, (88), 88 states have call successors, (88) [2023-11-06 22:18:28,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 652 states to 652 states and 1045 transitions. [2023-11-06 22:18:28,835 INFO L78 Accepts]: Start accepts. Automaton has 652 states and 1045 transitions. Word has length 252 [2023-11-06 22:18:28,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:18:28,836 INFO L495 AbstractCegarLoop]: Abstraction has 652 states and 1045 transitions. [2023-11-06 22:18:28,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 2 states have call successors, (50), 2 states have call predecessors, (50), 4 states have return successors, (51), 2 states have call predecessors, (51), 2 states have call successors, (51) [2023-11-06 22:18:28,836 INFO L276 IsEmpty]: Start isEmpty. Operand 652 states and 1045 transitions. [2023-11-06 22:18:28,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2023-11-06 22:18:28,843 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:18:28,844 INFO L195 NwaCegarLoop]: trace histogram [35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:18:28,855 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f75ce01-31bb-4ccc-86e1-5fafded5f15c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 22:18:29,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f75ce01-31bb-4ccc-86e1-5fafded5f15c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:18:29,051 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:18:29,051 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:18:29,051 INFO L85 PathProgramCache]: Analyzing trace with hash -134190181, now seen corresponding path program 1 times [2023-11-06 22:18:29,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:18:29,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007471709] [2023-11-06 22:18:29,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:29,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:18:29,117 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:18:29,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [973253609] [2023-11-06 22:18:29,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:29,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:18:29,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f75ce01-31bb-4ccc-86e1-5fafded5f15c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:18:29,119 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f75ce01-31bb-4ccc-86e1-5fafded5f15c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:18:29,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f75ce01-31bb-4ccc-86e1-5fafded5f15c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 22:18:29,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:29,443 INFO L262 TraceCheckSpWp]: Trace formula consists of 634 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-06 22:18:29,451 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:18:30,002 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2380 trivial. 0 not checked. [2023-11-06 22:18:30,003 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:18:30,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:18:30,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007471709] [2023-11-06 22:18:30,003 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:18:30,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973253609] [2023-11-06 22:18:30,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973253609] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:18:30,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:18:30,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-06 22:18:30,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411458231] [2023-11-06 22:18:30,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:18:30,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 22:18:30,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:18:30,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 22:18:30,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-11-06 22:18:30,006 INFO L87 Difference]: Start difference. First operand 652 states and 1045 transitions. Second operand has 10 states, 10 states have (on average 8.0) internal successors, (80), 10 states have internal predecessors, (80), 1 states have call successors, (35), 1 states have call predecessors, (35), 1 states have return successors, (35), 1 states have call predecessors, (35), 1 states have call successors, (35) [2023-11-06 22:18:32,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:18:32,116 INFO L93 Difference]: Finished difference Result 3517 states and 5503 transitions. [2023-11-06 22:18:32,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-06 22:18:32,117 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 8.0) internal successors, (80), 10 states have internal predecessors, (80), 1 states have call successors, (35), 1 states have call predecessors, (35), 1 states have return successors, (35), 1 states have call predecessors, (35), 1 states have call successors, (35) Word has length 252 [2023-11-06 22:18:32,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:18:32,137 INFO L225 Difference]: With dead ends: 3517 [2023-11-06 22:18:32,137 INFO L226 Difference]: Without dead ends: 3084 [2023-11-06 22:18:32,140 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=208, Invalid=604, Unknown=0, NotChecked=0, Total=812 [2023-11-06 22:18:32,140 INFO L413 NwaCegarLoop]: 347 mSDtfsCounter, 3211 mSDsluCounter, 1802 mSDsCounter, 0 mSdLazyCounter, 691 mSolverCounterSat, 538 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3211 SdHoareTripleChecker+Valid, 2149 SdHoareTripleChecker+Invalid, 1229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 538 IncrementalHoareTripleChecker+Valid, 691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-06 22:18:32,141 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3211 Valid, 2149 Invalid, 1229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [538 Valid, 691 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-06 22:18:32,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3084 states. [2023-11-06 22:18:32,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3084 to 1660. [2023-11-06 22:18:32,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1660 states, 1522 states have (on average 1.5900131406044677) internal successors, (2420), 1525 states have internal predecessors, (2420), 128 states have call successors, (128), 9 states have call predecessors, (128), 9 states have return successors, (128), 125 states have call predecessors, (128), 128 states have call successors, (128) [2023-11-06 22:18:32,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1660 states to 1660 states and 2676 transitions. [2023-11-06 22:18:32,266 INFO L78 Accepts]: Start accepts. Automaton has 1660 states and 2676 transitions. Word has length 252 [2023-11-06 22:18:32,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:18:32,266 INFO L495 AbstractCegarLoop]: Abstraction has 1660 states and 2676 transitions. [2023-11-06 22:18:32,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.0) internal successors, (80), 10 states have internal predecessors, (80), 1 states have call successors, (35), 1 states have call predecessors, (35), 1 states have return successors, (35), 1 states have call predecessors, (35), 1 states have call successors, (35) [2023-11-06 22:18:32,267 INFO L276 IsEmpty]: Start isEmpty. Operand 1660 states and 2676 transitions. [2023-11-06 22:18:32,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2023-11-06 22:18:32,272 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:18:32,273 INFO L195 NwaCegarLoop]: trace histogram [35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:18:32,288 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f75ce01-31bb-4ccc-86e1-5fafded5f15c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 22:18:32,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f75ce01-31bb-4ccc-86e1-5fafded5f15c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-06 22:18:32,488 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:18:32,488 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:18:32,488 INFO L85 PathProgramCache]: Analyzing trace with hash 1243505170, now seen corresponding path program 1 times [2023-11-06 22:18:32,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:18:32,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595640832] [2023-11-06 22:18:32,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:32,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:18:32,534 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:18:32,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [721952582] [2023-11-06 22:18:32,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:32,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:18:32,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f75ce01-31bb-4ccc-86e1-5fafded5f15c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:18:32,537 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f75ce01-31bb-4ccc-86e1-5fafded5f15c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:18:32,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f75ce01-31bb-4ccc-86e1-5fafded5f15c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 22:18:32,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:32,849 INFO L262 TraceCheckSpWp]: Trace formula consists of 636 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-06 22:18:32,858 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:18:33,518 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2380 trivial. 0 not checked. [2023-11-06 22:18:33,518 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:18:33,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:18:33,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595640832] [2023-11-06 22:18:33,519 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:18:33,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721952582] [2023-11-06 22:18:33,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721952582] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:18:33,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:18:33,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-06 22:18:33,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545696915] [2023-11-06 22:18:33,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:18:33,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 22:18:33,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:18:33,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 22:18:33,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-11-06 22:18:33,522 INFO L87 Difference]: Start difference. First operand 1660 states and 2676 transitions. Second operand has 10 states, 10 states have (on average 8.0) internal successors, (80), 10 states have internal predecessors, (80), 1 states have call successors, (35), 1 states have call predecessors, (35), 1 states have return successors, (35), 1 states have call predecessors, (35), 1 states have call successors, (35) [2023-11-06 22:18:35,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:18:35,226 INFO L93 Difference]: Finished difference Result 3033 states and 4777 transitions. [2023-11-06 22:18:35,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-06 22:18:35,227 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 8.0) internal successors, (80), 10 states have internal predecessors, (80), 1 states have call successors, (35), 1 states have call predecessors, (35), 1 states have return successors, (35), 1 states have call predecessors, (35), 1 states have call successors, (35) Word has length 252 [2023-11-06 22:18:35,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:18:35,242 INFO L225 Difference]: With dead ends: 3033 [2023-11-06 22:18:35,242 INFO L226 Difference]: Without dead ends: 2300 [2023-11-06 22:18:35,244 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=118, Invalid=302, Unknown=0, NotChecked=0, Total=420 [2023-11-06 22:18:35,245 INFO L413 NwaCegarLoop]: 288 mSDtfsCounter, 3148 mSDsluCounter, 1441 mSDsCounter, 0 mSdLazyCounter, 748 mSolverCounterSat, 485 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3148 SdHoareTripleChecker+Valid, 1729 SdHoareTripleChecker+Invalid, 1233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 485 IncrementalHoareTripleChecker+Valid, 748 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-06 22:18:35,246 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3148 Valid, 1729 Invalid, 1233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [485 Valid, 748 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-06 22:18:35,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2300 states. [2023-11-06 22:18:35,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2300 to 1778. [2023-11-06 22:18:35,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1778 states, 1615 states have (on average 1.5826625386996904) internal successors, (2556), 1619 states have internal predecessors, (2556), 150 states have call successors, (150), 12 states have call predecessors, (150), 12 states have return successors, (150), 146 states have call predecessors, (150), 150 states have call successors, (150) [2023-11-06 22:18:35,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1778 states to 1778 states and 2856 transitions. [2023-11-06 22:18:35,393 INFO L78 Accepts]: Start accepts. Automaton has 1778 states and 2856 transitions. Word has length 252 [2023-11-06 22:18:35,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:18:35,394 INFO L495 AbstractCegarLoop]: Abstraction has 1778 states and 2856 transitions. [2023-11-06 22:18:35,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.0) internal successors, (80), 10 states have internal predecessors, (80), 1 states have call successors, (35), 1 states have call predecessors, (35), 1 states have return successors, (35), 1 states have call predecessors, (35), 1 states have call successors, (35) [2023-11-06 22:18:35,395 INFO L276 IsEmpty]: Start isEmpty. Operand 1778 states and 2856 transitions. [2023-11-06 22:18:35,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2023-11-06 22:18:35,402 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:18:35,402 INFO L195 NwaCegarLoop]: trace histogram [35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:18:35,409 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f75ce01-31bb-4ccc-86e1-5fafded5f15c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 22:18:35,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f75ce01-31bb-4ccc-86e1-5fafded5f15c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:18:35,609 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:18:35,610 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:18:35,610 INFO L85 PathProgramCache]: Analyzing trace with hash 697937051, now seen corresponding path program 1 times [2023-11-06 22:18:35,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:18:35,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902771346] [2023-11-06 22:18:35,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:35,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:18:35,670 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:18:35,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1280600321] [2023-11-06 22:18:35,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:35,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:18:35,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f75ce01-31bb-4ccc-86e1-5fafded5f15c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:18:35,672 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f75ce01-31bb-4ccc-86e1-5fafded5f15c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:18:35,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f75ce01-31bb-4ccc-86e1-5fafded5f15c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 22:18:35,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:35,994 INFO L262 TraceCheckSpWp]: Trace formula consists of 637 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-06 22:18:36,001 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:18:36,650 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 1134 proven. 36 refuted. 0 times theorem prover too weak. 1210 trivial. 0 not checked. [2023-11-06 22:18:36,651 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:18:37,103 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 66 proven. 36 refuted. 0 times theorem prover too weak. 2278 trivial. 0 not checked. [2023-11-06 22:18:37,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:18:37,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902771346] [2023-11-06 22:18:37,104 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:18:37,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280600321] [2023-11-06 22:18:37,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280600321] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:18:37,104 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:18:37,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2023-11-06 22:18:37,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562131456] [2023-11-06 22:18:37,107 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:18:37,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-06 22:18:37,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:18:37,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-06 22:18:37,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2023-11-06 22:18:37,110 INFO L87 Difference]: Start difference. First operand 1778 states and 2856 transitions. Second operand has 15 states, 15 states have (on average 8.4) internal successors, (126), 15 states have internal predecessors, (126), 4 states have call successors, (70), 3 states have call predecessors, (70), 5 states have return successors, (70), 4 states have call predecessors, (70), 4 states have call successors, (70) [2023-11-06 22:18:40,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:18:40,514 INFO L93 Difference]: Finished difference Result 5608 states and 8785 transitions. [2023-11-06 22:18:40,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-11-06 22:18:40,515 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 8.4) internal successors, (126), 15 states have internal predecessors, (126), 4 states have call successors, (70), 3 states have call predecessors, (70), 5 states have return successors, (70), 4 states have call predecessors, (70), 4 states have call successors, (70) Word has length 252 [2023-11-06 22:18:40,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:18:40,545 INFO L225 Difference]: With dead ends: 5608 [2023-11-06 22:18:40,545 INFO L226 Difference]: Without dead ends: 4627 [2023-11-06 22:18:40,549 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 547 GetRequests, 495 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 820 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=619, Invalid=1931, Unknown=0, NotChecked=0, Total=2550 [2023-11-06 22:18:40,552 INFO L413 NwaCegarLoop]: 263 mSDtfsCounter, 4862 mSDsluCounter, 1762 mSDsCounter, 0 mSdLazyCounter, 1000 mSolverCounterSat, 1000 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4921 SdHoareTripleChecker+Valid, 2025 SdHoareTripleChecker+Invalid, 2000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1000 IncrementalHoareTripleChecker+Valid, 1000 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:18:40,552 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4921 Valid, 2025 Invalid, 2000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1000 Valid, 1000 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-11-06 22:18:40,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4627 states. [2023-11-06 22:18:40,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4627 to 3595. [2023-11-06 22:18:40,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3595 states, 3244 states have (on average 1.5804562268803946) internal successors, (5127), 3256 states have internal predecessors, (5127), 319 states have call successors, (319), 31 states have call predecessors, (319), 31 states have return successors, (319), 307 states have call predecessors, (319), 319 states have call successors, (319) [2023-11-06 22:18:40,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3595 states to 3595 states and 5765 transitions. [2023-11-06 22:18:40,883 INFO L78 Accepts]: Start accepts. Automaton has 3595 states and 5765 transitions. Word has length 252 [2023-11-06 22:18:40,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:18:40,885 INFO L495 AbstractCegarLoop]: Abstraction has 3595 states and 5765 transitions. [2023-11-06 22:18:40,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 8.4) internal successors, (126), 15 states have internal predecessors, (126), 4 states have call successors, (70), 3 states have call predecessors, (70), 5 states have return successors, (70), 4 states have call predecessors, (70), 4 states have call successors, (70) [2023-11-06 22:18:40,886 INFO L276 IsEmpty]: Start isEmpty. Operand 3595 states and 5765 transitions. [2023-11-06 22:18:40,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2023-11-06 22:18:40,894 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:18:40,895 INFO L195 NwaCegarLoop]: trace histogram [35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:18:40,904 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f75ce01-31bb-4ccc-86e1-5fafded5f15c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-06 22:18:41,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f75ce01-31bb-4ccc-86e1-5fafded5f15c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:18:41,102 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:18:41,102 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:18:41,103 INFO L85 PathProgramCache]: Analyzing trace with hash -2080782181, now seen corresponding path program 1 times [2023-11-06 22:18:41,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:18:41,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427052670] [2023-11-06 22:18:41,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:41,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:18:41,155 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:18:41,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [476184536] [2023-11-06 22:18:41,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:41,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:18:41,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f75ce01-31bb-4ccc-86e1-5fafded5f15c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:18:41,157 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f75ce01-31bb-4ccc-86e1-5fafded5f15c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:18:41,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f75ce01-31bb-4ccc-86e1-5fafded5f15c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 22:18:41,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:41,527 INFO L262 TraceCheckSpWp]: Trace formula consists of 636 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-06 22:18:41,543 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:18:42,247 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2380 trivial. 0 not checked. [2023-11-06 22:18:42,247 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:18:42,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:18:42,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427052670] [2023-11-06 22:18:42,248 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:18:42,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476184536] [2023-11-06 22:18:42,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476184536] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:18:42,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:18:42,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-06 22:18:42,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000181832] [2023-11-06 22:18:42,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:18:42,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:18:42,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:18:42,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:18:42,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:18:42,251 INFO L87 Difference]: Start difference. First operand 3595 states and 5765 transitions. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 6 states have internal predecessors, (80), 1 states have call successors, (35), 1 states have call predecessors, (35), 1 states have return successors, (35), 1 states have call predecessors, (35), 1 states have call successors, (35) [2023-11-06 22:18:43,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:18:43,038 INFO L93 Difference]: Finished difference Result 9392 states and 14960 transitions. [2023-11-06 22:18:43,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-06 22:18:43,039 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 6 states have internal predecessors, (80), 1 states have call successors, (35), 1 states have call predecessors, (35), 1 states have return successors, (35), 1 states have call predecessors, (35), 1 states have call successors, (35) Word has length 252 [2023-11-06 22:18:43,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:18:43,083 INFO L225 Difference]: With dead ends: 9392 [2023-11-06 22:18:43,083 INFO L226 Difference]: Without dead ends: 6378 [2023-11-06 22:18:43,095 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2023-11-06 22:18:43,096 INFO L413 NwaCegarLoop]: 236 mSDtfsCounter, 992 mSDsluCounter, 811 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 992 SdHoareTripleChecker+Valid, 1047 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 22:18:43,097 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [992 Valid, 1047 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 22:18:43,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6378 states. [2023-11-06 22:18:43,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6378 to 4405. [2023-11-06 22:18:43,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4405 states, 4054 states have (on average 1.5929945732609767) internal successors, (6458), 4066 states have internal predecessors, (6458), 319 states have call successors, (319), 31 states have call predecessors, (319), 31 states have return successors, (319), 307 states have call predecessors, (319), 319 states have call successors, (319) [2023-11-06 22:18:43,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4405 states to 4405 states and 7096 transitions. [2023-11-06 22:18:43,446 INFO L78 Accepts]: Start accepts. Automaton has 4405 states and 7096 transitions. Word has length 252 [2023-11-06 22:18:43,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:18:43,447 INFO L495 AbstractCegarLoop]: Abstraction has 4405 states and 7096 transitions. [2023-11-06 22:18:43,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 6 states have internal predecessors, (80), 1 states have call successors, (35), 1 states have call predecessors, (35), 1 states have return successors, (35), 1 states have call predecessors, (35), 1 states have call successors, (35) [2023-11-06 22:18:43,447 INFO L276 IsEmpty]: Start isEmpty. Operand 4405 states and 7096 transitions. [2023-11-06 22:18:43,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2023-11-06 22:18:43,455 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:18:43,455 INFO L195 NwaCegarLoop]: trace histogram [35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:18:43,467 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f75ce01-31bb-4ccc-86e1-5fafded5f15c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-06 22:18:43,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f75ce01-31bb-4ccc-86e1-5fafded5f15c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-06 22:18:43,662 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:18:43,663 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:18:43,663 INFO L85 PathProgramCache]: Analyzing trace with hash -528556967, now seen corresponding path program 1 times [2023-11-06 22:18:43,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:18:43,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685426968] [2023-11-06 22:18:43,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:43,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:18:43,725 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:18:43,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1459608633] [2023-11-06 22:18:43,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:43,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:18:43,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f75ce01-31bb-4ccc-86e1-5fafded5f15c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:18:43,728 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f75ce01-31bb-4ccc-86e1-5fafded5f15c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:18:43,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f75ce01-31bb-4ccc-86e1-5fafded5f15c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-06 22:18:44,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:44,071 INFO L262 TraceCheckSpWp]: Trace formula consists of 635 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-06 22:18:44,078 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:18:44,434 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2380 trivial. 0 not checked. [2023-11-06 22:18:44,435 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:18:44,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:18:44,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685426968] [2023-11-06 22:18:44,435 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:18:44,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459608633] [2023-11-06 22:18:44,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459608633] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:18:44,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:18:44,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-06 22:18:44,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540051066] [2023-11-06 22:18:44,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:18:44,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:18:44,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:18:44,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:18:44,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:18:44,439 INFO L87 Difference]: Start difference. First operand 4405 states and 7096 transitions. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 1 states have call successors, (35), 1 states have call predecessors, (35), 1 states have return successors, (35), 1 states have call predecessors, (35), 1 states have call successors, (35) [2023-11-06 22:18:45,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:18:45,716 INFO L93 Difference]: Finished difference Result 10529 states and 16574 transitions. [2023-11-06 22:18:45,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-06 22:18:45,717 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 1 states have call successors, (35), 1 states have call predecessors, (35), 1 states have return successors, (35), 1 states have call predecessors, (35), 1 states have call successors, (35) Word has length 252 [2023-11-06 22:18:45,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:18:45,757 INFO L225 Difference]: With dead ends: 10529 [2023-11-06 22:18:45,757 INFO L226 Difference]: Without dead ends: 7525 [2023-11-06 22:18:45,764 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 249 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2023-11-06 22:18:45,765 INFO L413 NwaCegarLoop]: 385 mSDtfsCounter, 1321 mSDsluCounter, 1489 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 229 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1321 SdHoareTripleChecker+Valid, 1874 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 229 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-06 22:18:45,765 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1321 Valid, 1874 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [229 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-06 22:18:45,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7525 states. [2023-11-06 22:18:46,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7525 to 4679. [2023-11-06 22:18:46,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4679 states, 4226 states have (on average 1.5586843350686228) internal successors, (6587), 4242 states have internal predecessors, (6587), 409 states have call successors, (409), 43 states have call predecessors, (409), 43 states have return successors, (409), 393 states have call predecessors, (409), 409 states have call successors, (409) [2023-11-06 22:18:46,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4679 states to 4679 states and 7405 transitions. [2023-11-06 22:18:46,316 INFO L78 Accepts]: Start accepts. Automaton has 4679 states and 7405 transitions. Word has length 252 [2023-11-06 22:18:46,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:18:46,317 INFO L495 AbstractCegarLoop]: Abstraction has 4679 states and 7405 transitions. [2023-11-06 22:18:46,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 1 states have call successors, (35), 1 states have call predecessors, (35), 1 states have return successors, (35), 1 states have call predecessors, (35), 1 states have call successors, (35) [2023-11-06 22:18:46,318 INFO L276 IsEmpty]: Start isEmpty. Operand 4679 states and 7405 transitions. [2023-11-06 22:18:46,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2023-11-06 22:18:46,325 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:18:46,325 INFO L195 NwaCegarLoop]: trace histogram [35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:18:46,332 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f75ce01-31bb-4ccc-86e1-5fafded5f15c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-06 22:18:46,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f75ce01-31bb-4ccc-86e1-5fafded5f15c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:18:46,533 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:18:46,533 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:18:46,534 INFO L85 PathProgramCache]: Analyzing trace with hash 849138384, now seen corresponding path program 1 times [2023-11-06 22:18:46,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:18:46,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773334842] [2023-11-06 22:18:46,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:46,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:18:46,585 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:18:46,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2832705] [2023-11-06 22:18:46,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:46,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:18:46,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f75ce01-31bb-4ccc-86e1-5fafded5f15c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:18:46,588 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f75ce01-31bb-4ccc-86e1-5fafded5f15c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:18:46,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f75ce01-31bb-4ccc-86e1-5fafded5f15c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-06 22:18:46,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:46,963 INFO L262 TraceCheckSpWp]: Trace formula consists of 637 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-06 22:18:46,969 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:18:47,356 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2380 trivial. 0 not checked. [2023-11-06 22:18:47,356 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:18:47,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:18:47,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773334842] [2023-11-06 22:18:47,356 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:18:47,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2832705] [2023-11-06 22:18:47,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2832705] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:18:47,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:18:47,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-06 22:18:47,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821184767] [2023-11-06 22:18:47,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:18:47,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 22:18:47,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:18:47,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 22:18:47,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:18:47,360 INFO L87 Difference]: Start difference. First operand 4679 states and 7405 transitions. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 1 states have call successors, (35), 1 states have call predecessors, (35), 1 states have return successors, (35), 1 states have call predecessors, (35), 1 states have call successors, (35) [2023-11-06 22:18:49,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:18:49,010 INFO L93 Difference]: Finished difference Result 9425 states and 14682 transitions. [2023-11-06 22:18:49,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-06 22:18:49,012 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 1 states have call successors, (35), 1 states have call predecessors, (35), 1 states have return successors, (35), 1 states have call predecessors, (35), 1 states have call successors, (35) Word has length 252 [2023-11-06 22:18:49,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:18:49,040 INFO L225 Difference]: With dead ends: 9425 [2023-11-06 22:18:49,040 INFO L226 Difference]: Without dead ends: 6597 [2023-11-06 22:18:49,046 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2023-11-06 22:18:49,047 INFO L413 NwaCegarLoop]: 259 mSDtfsCounter, 1566 mSDsluCounter, 1488 mSDsCounter, 0 mSdLazyCounter, 597 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1566 SdHoareTripleChecker+Valid, 1747 SdHoareTripleChecker+Invalid, 790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-06 22:18:49,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1566 Valid, 1747 Invalid, 790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 597 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-06 22:18:49,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6597 states. [2023-11-06 22:18:49,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6597 to 4706. [2023-11-06 22:18:49,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4706 states, 4253 states have (on average 1.5593698565718317) internal successors, (6632), 4269 states have internal predecessors, (6632), 409 states have call successors, (409), 43 states have call predecessors, (409), 43 states have return successors, (409), 393 states have call predecessors, (409), 409 states have call successors, (409) [2023-11-06 22:18:49,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4706 states to 4706 states and 7450 transitions. [2023-11-06 22:18:49,462 INFO L78 Accepts]: Start accepts. Automaton has 4706 states and 7450 transitions. Word has length 252 [2023-11-06 22:18:49,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:18:49,462 INFO L495 AbstractCegarLoop]: Abstraction has 4706 states and 7450 transitions. [2023-11-06 22:18:49,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 1 states have call successors, (35), 1 states have call predecessors, (35), 1 states have return successors, (35), 1 states have call predecessors, (35), 1 states have call successors, (35) [2023-11-06 22:18:49,463 INFO L276 IsEmpty]: Start isEmpty. Operand 4706 states and 7450 transitions. [2023-11-06 22:18:49,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2023-11-06 22:18:49,469 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:18:49,470 INFO L195 NwaCegarLoop]: trace histogram [35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:18:49,483 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f75ce01-31bb-4ccc-86e1-5fafded5f15c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-06 22:18:49,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f75ce01-31bb-4ccc-86e1-5fafded5f15c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-06 22:18:49,677 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:18:49,677 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:18:49,677 INFO L85 PathProgramCache]: Analyzing trace with hash 303570265, now seen corresponding path program 1 times [2023-11-06 22:18:49,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:18:49,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744074846] [2023-11-06 22:18:49,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:49,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:18:49,778 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:18:49,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [753656111] [2023-11-06 22:18:49,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:49,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:18:49,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f75ce01-31bb-4ccc-86e1-5fafded5f15c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:18:49,796 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f75ce01-31bb-4ccc-86e1-5fafded5f15c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:18:49,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f75ce01-31bb-4ccc-86e1-5fafded5f15c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-06 22:18:50,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:50,189 INFO L262 TraceCheckSpWp]: Trace formula consists of 638 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 22:18:50,195 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:18:50,852 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 1114 proven. 66 refuted. 0 times theorem prover too weak. 1200 trivial. 0 not checked. [2023-11-06 22:18:50,852 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:18:51,246 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 36 proven. 66 refuted. 0 times theorem prover too weak. 2278 trivial. 0 not checked. [2023-11-06 22:18:51,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:18:51,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744074846] [2023-11-06 22:18:51,247 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:18:51,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753656111] [2023-11-06 22:18:51,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753656111] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:18:51,248 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:18:51,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2023-11-06 22:18:51,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131703748] [2023-11-06 22:18:51,250 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:18:51,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-06 22:18:51,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:18:51,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-06 22:18:51,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2023-11-06 22:18:51,253 INFO L87 Difference]: Start difference. First operand 4706 states and 7450 transitions. Second operand has 14 states, 14 states have (on average 8.714285714285714) internal successors, (122), 14 states have internal predecessors, (122), 4 states have call successors, (70), 3 states have call predecessors, (70), 5 states have return successors, (70), 4 states have call predecessors, (70), 4 states have call successors, (70) [2023-11-06 22:18:52,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:18:52,956 INFO L93 Difference]: Finished difference Result 13348 states and 21094 transitions. [2023-11-06 22:18:52,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-06 22:18:52,960 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 8.714285714285714) internal successors, (122), 14 states have internal predecessors, (122), 4 states have call successors, (70), 3 states have call predecessors, (70), 5 states have return successors, (70), 4 states have call predecessors, (70), 4 states have call successors, (70) Word has length 252 [2023-11-06 22:18:52,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:18:52,986 INFO L225 Difference]: With dead ends: 13348 [2023-11-06 22:18:52,987 INFO L226 Difference]: Without dead ends: 9652 [2023-11-06 22:18:52,995 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 514 GetRequests, 492 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=391, Unknown=0, NotChecked=0, Total=552 [2023-11-06 22:18:52,996 INFO L413 NwaCegarLoop]: 244 mSDtfsCounter, 1278 mSDsluCounter, 1895 mSDsCounter, 0 mSdLazyCounter, 884 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1312 SdHoareTripleChecker+Valid, 2139 SdHoareTripleChecker+Invalid, 1046 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 884 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-06 22:18:52,996 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1312 Valid, 2139 Invalid, 1046 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 884 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-06 22:18:53,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9652 states. [2023-11-06 22:18:53,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9652 to 6742. [2023-11-06 22:18:53,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6742 states, 5858 states have (on average 1.5472857630590646) internal successors, (9064), 5890 states have internal predecessors, (9064), 783 states have call successors, (783), 100 states have call predecessors, (783), 100 states have return successors, (783), 751 states have call predecessors, (783), 783 states have call successors, (783) [2023-11-06 22:18:53,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6742 states to 6742 states and 10630 transitions. [2023-11-06 22:18:53,921 INFO L78 Accepts]: Start accepts. Automaton has 6742 states and 10630 transitions. Word has length 252 [2023-11-06 22:18:53,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:18:53,921 INFO L495 AbstractCegarLoop]: Abstraction has 6742 states and 10630 transitions. [2023-11-06 22:18:53,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 8.714285714285714) internal successors, (122), 14 states have internal predecessors, (122), 4 states have call successors, (70), 3 states have call predecessors, (70), 5 states have return successors, (70), 4 states have call predecessors, (70), 4 states have call successors, (70) [2023-11-06 22:18:53,922 INFO L276 IsEmpty]: Start isEmpty. Operand 6742 states and 10630 transitions. [2023-11-06 22:18:53,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2023-11-06 22:18:53,927 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:18:53,927 INFO L195 NwaCegarLoop]: trace histogram [35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:18:53,939 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f75ce01-31bb-4ccc-86e1-5fafded5f15c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-06 22:18:54,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f75ce01-31bb-4ccc-86e1-5fafded5f15c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-06 22:18:54,134 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:18:54,135 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:18:54,135 INFO L85 PathProgramCache]: Analyzing trace with hash -1855712559, now seen corresponding path program 1 times [2023-11-06 22:18:54,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:18:54,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774457433] [2023-11-06 22:18:54,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:54,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:18:54,203 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:18:54,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1819705099] [2023-11-06 22:18:54,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:54,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:18:54,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f75ce01-31bb-4ccc-86e1-5fafded5f15c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:18:54,212 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f75ce01-31bb-4ccc-86e1-5fafded5f15c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:18:54,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f75ce01-31bb-4ccc-86e1-5fafded5f15c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-06 22:18:54,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:54,587 INFO L262 TraceCheckSpWp]: Trace formula consists of 639 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-06 22:18:54,592 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:18:55,464 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2380 trivial. 0 not checked. [2023-11-06 22:18:55,464 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:18:55,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:18:55,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774457433] [2023-11-06 22:18:55,465 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:18:55,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819705099] [2023-11-06 22:18:55,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819705099] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:18:55,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:18:55,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-06 22:18:55,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568045393] [2023-11-06 22:18:55,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:18:55,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 22:18:55,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:18:55,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 22:18:55,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:18:55,468 INFO L87 Difference]: Start difference. First operand 6742 states and 10630 transitions. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 7 states have internal predecessors, (81), 1 states have call successors, (35), 1 states have call predecessors, (35), 1 states have return successors, (35), 1 states have call predecessors, (35), 1 states have call successors, (35) [2023-11-06 22:18:56,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:18:56,860 INFO L93 Difference]: Finished difference Result 16898 states and 26622 transitions. [2023-11-06 22:18:56,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 22:18:56,861 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 7 states have internal predecessors, (81), 1 states have call successors, (35), 1 states have call predecessors, (35), 1 states have return successors, (35), 1 states have call predecessors, (35), 1 states have call successors, (35) Word has length 253 [2023-11-06 22:18:56,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:18:56,887 INFO L225 Difference]: With dead ends: 16898 [2023-11-06 22:18:56,887 INFO L226 Difference]: Without dead ends: 10338 [2023-11-06 22:18:56,899 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2023-11-06 22:18:56,900 INFO L413 NwaCegarLoop]: 274 mSDtfsCounter, 548 mSDsluCounter, 1367 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 548 SdHoareTripleChecker+Valid, 1641 SdHoareTripleChecker+Invalid, 535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-06 22:18:56,900 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [548 Valid, 1641 Invalid, 535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 463 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-06 22:18:56,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10338 states. [2023-11-06 22:18:57,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10338 to 7165. [2023-11-06 22:18:57,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7165 states, 6281 states have (on average 1.5480019105238019) internal successors, (9723), 6313 states have internal predecessors, (9723), 783 states have call successors, (783), 100 states have call predecessors, (783), 100 states have return successors, (783), 751 states have call predecessors, (783), 783 states have call successors, (783) [2023-11-06 22:18:57,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7165 states to 7165 states and 11289 transitions. [2023-11-06 22:18:57,688 INFO L78 Accepts]: Start accepts. Automaton has 7165 states and 11289 transitions. Word has length 253 [2023-11-06 22:18:57,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:18:57,689 INFO L495 AbstractCegarLoop]: Abstraction has 7165 states and 11289 transitions. [2023-11-06 22:18:57,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 7 states have internal predecessors, (81), 1 states have call successors, (35), 1 states have call predecessors, (35), 1 states have return successors, (35), 1 states have call predecessors, (35), 1 states have call successors, (35) [2023-11-06 22:18:57,689 INFO L276 IsEmpty]: Start isEmpty. Operand 7165 states and 11289 transitions. [2023-11-06 22:18:57,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2023-11-06 22:18:57,695 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:18:57,696 INFO L195 NwaCegarLoop]: trace histogram [35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:18:57,712 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f75ce01-31bb-4ccc-86e1-5fafded5f15c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-06 22:18:57,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f75ce01-31bb-4ccc-86e1-5fafded5f15c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-06 22:18:57,903 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:18:57,904 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:18:57,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1035396335, now seen corresponding path program 1 times [2023-11-06 22:18:57,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:18:57,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419463960] [2023-11-06 22:18:57,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:57,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:18:57,954 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:18:57,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [581821664] [2023-11-06 22:18:57,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:57,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:18:57,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f75ce01-31bb-4ccc-86e1-5fafded5f15c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:18:57,956 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f75ce01-31bb-4ccc-86e1-5fafded5f15c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:18:57,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f75ce01-31bb-4ccc-86e1-5fafded5f15c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-06 22:18:58,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:58,380 INFO L262 TraceCheckSpWp]: Trace formula consists of 642 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-06 22:18:58,386 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:18:59,311 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2380 trivial. 0 not checked. [2023-11-06 22:18:59,311 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:18:59,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:18:59,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419463960] [2023-11-06 22:18:59,311 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:18:59,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581821664] [2023-11-06 22:18:59,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581821664] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:18:59,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:18:59,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-06 22:18:59,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920010986] [2023-11-06 22:18:59,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:18:59,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 22:18:59,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:18:59,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 22:18:59,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:18:59,314 INFO L87 Difference]: Start difference. First operand 7165 states and 11289 transitions. Second operand has 12 states, 12 states have (on average 6.833333333333333) internal successors, (82), 11 states have internal predecessors, (82), 1 states have call successors, (35), 1 states have call predecessors, (35), 1 states have return successors, (35), 1 states have call predecessors, (35), 1 states have call successors, (35) [2023-11-06 22:19:02,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:19:02,159 INFO L93 Difference]: Finished difference Result 34748 states and 55151 transitions. [2023-11-06 22:19:02,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-06 22:19:02,160 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.833333333333333) internal successors, (82), 11 states have internal predecessors, (82), 1 states have call successors, (35), 1 states have call predecessors, (35), 1 states have return successors, (35), 1 states have call predecessors, (35), 1 states have call successors, (35) Word has length 254 [2023-11-06 22:19:02,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:19:02,224 INFO L225 Difference]: With dead ends: 34748 [2023-11-06 22:19:02,224 INFO L226 Difference]: Without dead ends: 29176 [2023-11-06 22:19:02,239 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 243 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=158, Invalid=394, Unknown=0, NotChecked=0, Total=552 [2023-11-06 22:19:02,240 INFO L413 NwaCegarLoop]: 275 mSDtfsCounter, 1081 mSDsluCounter, 2058 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1081 SdHoareTripleChecker+Valid, 2333 SdHoareTripleChecker+Invalid, 812 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-06 22:19:02,240 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1081 Valid, 2333 Invalid, 812 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 662 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-06 22:19:02,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29176 states. [2023-11-06 22:19:03,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29176 to 14459. [2023-11-06 22:19:03,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14459 states, 12698 states have (on average 1.543550165380375) internal successors, (19600), 12762 states have internal predecessors, (19600), 1531 states have call successors, (1531), 229 states have call predecessors, (1531), 229 states have return successors, (1531), 1467 states have call predecessors, (1531), 1531 states have call successors, (1531) [2023-11-06 22:19:03,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14459 states to 14459 states and 22662 transitions. [2023-11-06 22:19:03,748 INFO L78 Accepts]: Start accepts. Automaton has 14459 states and 22662 transitions. Word has length 254 [2023-11-06 22:19:03,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:19:03,749 INFO L495 AbstractCegarLoop]: Abstraction has 14459 states and 22662 transitions. [2023-11-06 22:19:03,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.833333333333333) internal successors, (82), 11 states have internal predecessors, (82), 1 states have call successors, (35), 1 states have call predecessors, (35), 1 states have return successors, (35), 1 states have call predecessors, (35), 1 states have call successors, (35) [2023-11-06 22:19:03,749 INFO L276 IsEmpty]: Start isEmpty. Operand 14459 states and 22662 transitions. [2023-11-06 22:19:03,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2023-11-06 22:19:03,757 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:19:03,758 INFO L195 NwaCegarLoop]: trace histogram [35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:19:03,769 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f75ce01-31bb-4ccc-86e1-5fafded5f15c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-06 22:19:03,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f75ce01-31bb-4ccc-86e1-5fafded5f15c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-06 22:19:03,965 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:19:03,965 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:19:03,965 INFO L85 PathProgramCache]: Analyzing trace with hash -792378989, now seen corresponding path program 1 times [2023-11-06 22:19:03,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:19:03,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544047618] [2023-11-06 22:19:03,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:19:03,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:19:04,013 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:19:04,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [287165926] [2023-11-06 22:19:04,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:19:04,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:19:04,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f75ce01-31bb-4ccc-86e1-5fafded5f15c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:19:04,015 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f75ce01-31bb-4ccc-86e1-5fafded5f15c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:19:04,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f75ce01-31bb-4ccc-86e1-5fafded5f15c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-06 22:19:04,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:19:04,466 INFO L262 TraceCheckSpWp]: Trace formula consists of 643 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-06 22:19:04,472 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:19:06,867 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 1192 proven. 228 refuted. 0 times theorem prover too weak. 960 trivial. 0 not checked. [2023-11-06 22:19:06,868 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:19:08,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:19:08,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544047618] [2023-11-06 22:19:08,282 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:19:08,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287165926] [2023-11-06 22:19:08,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287165926] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:19:08,283 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:19:08,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2023-11-06 22:19:08,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049984635] [2023-11-06 22:19:08,283 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-06 22:19:08,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-06 22:19:08,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:19:08,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-06 22:19:08,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1026, Unknown=0, NotChecked=0, Total=1190 [2023-11-06 22:19:08,286 INFO L87 Difference]: Start difference. First operand 14459 states and 22662 transitions. Second operand has 23 states, 23 states have (on average 4.217391304347826) internal successors, (97), 20 states have internal predecessors, (97), 5 states have call successors, (35), 5 states have call predecessors, (35), 6 states have return successors, (35), 5 states have call predecessors, (35), 5 states have call successors, (35) [2023-11-06 22:19:14,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:19:14,281 INFO L93 Difference]: Finished difference Result 46727 states and 73286 transitions. [2023-11-06 22:19:14,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-06 22:19:14,282 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.217391304347826) internal successors, (97), 20 states have internal predecessors, (97), 5 states have call successors, (35), 5 states have call predecessors, (35), 6 states have return successors, (35), 5 states have call predecessors, (35), 5 states have call successors, (35) Word has length 254 [2023-11-06 22:19:14,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:19:14,344 INFO L225 Difference]: With dead ends: 46727 [2023-11-06 22:19:14,344 INFO L226 Difference]: Without dead ends: 33021 [2023-11-06 22:19:14,368 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 384 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 984 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=805, Invalid=3485, Unknown=0, NotChecked=0, Total=4290 [2023-11-06 22:19:14,369 INFO L413 NwaCegarLoop]: 311 mSDtfsCounter, 1939 mSDsluCounter, 2035 mSDsCounter, 0 mSdLazyCounter, 1871 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1939 SdHoareTripleChecker+Valid, 2346 SdHoareTripleChecker+Invalid, 2057 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 1871 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-11-06 22:19:14,370 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1939 Valid, 2346 Invalid, 2057 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 1871 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-11-06 22:19:14,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33021 states. [2023-11-06 22:19:16,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33021 to 25331. [2023-11-06 22:19:16,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25331 states, 22391 states have (on average 1.5343218257335536) internal successors, (34355), 22497 states have internal predecessors, (34355), 2561 states have call successors, (2561), 378 states have call predecessors, (2561), 378 states have return successors, (2561), 2455 states have call predecessors, (2561), 2561 states have call successors, (2561) [2023-11-06 22:19:16,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25331 states to 25331 states and 39477 transitions. [2023-11-06 22:19:16,803 INFO L78 Accepts]: Start accepts. Automaton has 25331 states and 39477 transitions. Word has length 254 [2023-11-06 22:19:16,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:19:16,804 INFO L495 AbstractCegarLoop]: Abstraction has 25331 states and 39477 transitions. [2023-11-06 22:19:16,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.217391304347826) internal successors, (97), 20 states have internal predecessors, (97), 5 states have call successors, (35), 5 states have call predecessors, (35), 6 states have return successors, (35), 5 states have call predecessors, (35), 5 states have call successors, (35) [2023-11-06 22:19:16,804 INFO L276 IsEmpty]: Start isEmpty. Operand 25331 states and 39477 transitions. [2023-11-06 22:19:16,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2023-11-06 22:19:16,817 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:19:16,817 INFO L195 NwaCegarLoop]: trace histogram [35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:19:16,829 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f75ce01-31bb-4ccc-86e1-5fafded5f15c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-06 22:19:17,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f75ce01-31bb-4ccc-86e1-5fafded5f15c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-06 22:19:17,024 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:19:17,025 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:19:17,025 INFO L85 PathProgramCache]: Analyzing trace with hash -2046513585, now seen corresponding path program 1 times [2023-11-06 22:19:17,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:19:17,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316355682] [2023-11-06 22:19:17,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:19:17,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:19:17,075 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:19:17,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1842094574] [2023-11-06 22:19:17,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:19:17,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:19:17,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f75ce01-31bb-4ccc-86e1-5fafded5f15c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:19:17,077 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f75ce01-31bb-4ccc-86e1-5fafded5f15c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:19:17,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f75ce01-31bb-4ccc-86e1-5fafded5f15c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-06 22:19:17,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:19:17,499 INFO L262 TraceCheckSpWp]: Trace formula consists of 640 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 22:19:17,504 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:19:17,811 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2380 trivial. 0 not checked. [2023-11-06 22:19:17,812 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:19:17,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:19:17,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316355682] [2023-11-06 22:19:17,812 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:19:17,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842094574] [2023-11-06 22:19:17,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842094574] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:19:17,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:19:17,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:19:17,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450443505] [2023-11-06 22:19:17,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:19:17,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:19:17,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:19:17,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:19:17,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:19:17,815 INFO L87 Difference]: Start difference. First operand 25331 states and 39477 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 1 states have call successors, (35), 1 states have call predecessors, (35), 1 states have return successors, (35), 1 states have call predecessors, (35), 1 states have call successors, (35) [2023-11-06 22:19:21,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:19:21,788 INFO L93 Difference]: Finished difference Result 71777 states and 111749 transitions. [2023-11-06 22:19:21,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:19:21,789 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 1 states have call successors, (35), 1 states have call predecessors, (35), 1 states have return successors, (35), 1 states have call predecessors, (35), 1 states have call successors, (35) Word has length 254 [2023-11-06 22:19:21,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:19:21,899 INFO L225 Difference]: With dead ends: 71777 [2023-11-06 22:19:21,899 INFO L226 Difference]: Without dead ends: 48437 [2023-11-06 22:19:21,937 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 252 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 22:19:21,938 INFO L413 NwaCegarLoop]: 243 mSDtfsCounter, 99 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 478 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:19:21,938 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 478 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:19:21,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48437 states. [2023-11-06 22:19:27,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48437 to 47215. [2023-11-06 22:19:27,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47215 states, 41380 states have (on average 1.5246012566457225) internal successors, (63088), 41592 states have internal predecessors, (63088), 5087 states have call successors, (5087), 747 states have call predecessors, (5087), 747 states have return successors, (5087), 4875 states have call predecessors, (5087), 5087 states have call successors, (5087) [2023-11-06 22:19:27,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47215 states to 47215 states and 73262 transitions. [2023-11-06 22:19:27,518 INFO L78 Accepts]: Start accepts. Automaton has 47215 states and 73262 transitions. Word has length 254 [2023-11-06 22:19:27,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:19:27,519 INFO L495 AbstractCegarLoop]: Abstraction has 47215 states and 73262 transitions. [2023-11-06 22:19:27,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 1 states have call successors, (35), 1 states have call predecessors, (35), 1 states have return successors, (35), 1 states have call predecessors, (35), 1 states have call successors, (35) [2023-11-06 22:19:27,519 INFO L276 IsEmpty]: Start isEmpty. Operand 47215 states and 73262 transitions. [2023-11-06 22:19:27,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2023-11-06 22:19:27,535 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:19:27,535 INFO L195 NwaCegarLoop]: trace histogram [35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:19:27,543 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f75ce01-31bb-4ccc-86e1-5fafded5f15c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-06 22:19:27,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f75ce01-31bb-4ccc-86e1-5fafded5f15c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-06 22:19:27,743 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:19:27,743 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:19:27,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1803496239, now seen corresponding path program 1 times [2023-11-06 22:19:27,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:19:27,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881315993] [2023-11-06 22:19:27,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:19:27,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:19:27,908 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:19:27,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1300743872] [2023-11-06 22:19:27,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:19:27,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:19:27,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f75ce01-31bb-4ccc-86e1-5fafded5f15c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:19:27,911 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f75ce01-31bb-4ccc-86e1-5fafded5f15c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:19:27,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f75ce01-31bb-4ccc-86e1-5fafded5f15c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-06 22:19:28,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:19:28,402 INFO L262 TraceCheckSpWp]: Trace formula consists of 641 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-06 22:19:28,408 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:19:29,703 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 1204 proven. 114 refuted. 0 times theorem prover too weak. 1062 trivial. 0 not checked. [2023-11-06 22:19:29,704 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:19:30,860 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 84 proven. 117 refuted. 0 times theorem prover too weak. 2179 trivial. 0 not checked. [2023-11-06 22:19:30,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:19:30,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881315993] [2023-11-06 22:19:30,861 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:19:30,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300743872] [2023-11-06 22:19:30,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300743872] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:19:30,861 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:19:30,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 26 [2023-11-06 22:19:30,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824404273] [2023-11-06 22:19:30,862 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:19:30,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-06 22:19:30,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:19:30,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-06 22:19:30,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=523, Unknown=0, NotChecked=0, Total=650 [2023-11-06 22:19:30,865 INFO L87 Difference]: Start difference. First operand 47215 states and 73262 transitions. Second operand has 26 states, 25 states have (on average 6.48) internal successors, (162), 24 states have internal predecessors, (162), 6 states have call successors, (70), 4 states have call predecessors, (70), 7 states have return successors, (70), 6 states have call predecessors, (70), 6 states have call successors, (70) [2023-11-06 22:19:41,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:19:41,949 INFO L93 Difference]: Finished difference Result 130658 states and 201022 transitions. [2023-11-06 22:19:41,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-06 22:19:41,950 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 6.48) internal successors, (162), 24 states have internal predecessors, (162), 6 states have call successors, (70), 4 states have call predecessors, (70), 7 states have return successors, (70), 6 states have call predecessors, (70), 6 states have call successors, (70) Word has length 254 [2023-11-06 22:19:41,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:19:42,141 INFO L225 Difference]: With dead ends: 130658 [2023-11-06 22:19:42,142 INFO L226 Difference]: Without dead ends: 85006 [2023-11-06 22:19:42,215 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 541 GetRequests, 487 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 846 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=801, Invalid=2279, Unknown=0, NotChecked=0, Total=3080 [2023-11-06 22:19:42,216 INFO L413 NwaCegarLoop]: 160 mSDtfsCounter, 2001 mSDsluCounter, 2126 mSDsCounter, 0 mSdLazyCounter, 2002 mSolverCounterSat, 376 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2002 SdHoareTripleChecker+Valid, 2286 SdHoareTripleChecker+Invalid, 2378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 376 IncrementalHoareTripleChecker+Valid, 2002 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:19:42,216 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2002 Valid, 2286 Invalid, 2378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [376 Valid, 2002 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-11-06 22:19:42,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85006 states. [2023-11-06 22:19:48,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85006 to 49392. [2023-11-06 22:19:48,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49392 states, 43557 states have (on average 1.5264595816975457) internal successors, (66488), 43769 states have internal predecessors, (66488), 5087 states have call successors, (5087), 747 states have call predecessors, (5087), 747 states have return successors, (5087), 4875 states have call predecessors, (5087), 5087 states have call successors, (5087) [2023-11-06 22:19:48,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49392 states to 49392 states and 76662 transitions. [2023-11-06 22:19:48,792 INFO L78 Accepts]: Start accepts. Automaton has 49392 states and 76662 transitions. Word has length 254 [2023-11-06 22:19:48,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:19:48,793 INFO L495 AbstractCegarLoop]: Abstraction has 49392 states and 76662 transitions. [2023-11-06 22:19:48,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 6.48) internal successors, (162), 24 states have internal predecessors, (162), 6 states have call successors, (70), 4 states have call predecessors, (70), 7 states have return successors, (70), 6 states have call predecessors, (70), 6 states have call successors, (70) [2023-11-06 22:19:48,794 INFO L276 IsEmpty]: Start isEmpty. Operand 49392 states and 76662 transitions. [2023-11-06 22:19:48,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2023-11-06 22:19:48,811 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:19:48,811 INFO L195 NwaCegarLoop]: trace histogram [35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:19:48,817 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f75ce01-31bb-4ccc-86e1-5fafded5f15c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-06 22:19:49,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f75ce01-31bb-4ccc-86e1-5fafded5f15c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-06 22:19:49,012 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:19:49,013 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:19:49,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1082537779, now seen corresponding path program 1 times [2023-11-06 22:19:49,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:19:49,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497638214] [2023-11-06 22:19:49,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:19:49,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:19:49,063 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:19:49,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1498944197] [2023-11-06 22:19:49,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:19:49,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:19:49,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f75ce01-31bb-4ccc-86e1-5fafded5f15c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:19:49,065 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f75ce01-31bb-4ccc-86e1-5fafded5f15c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:19:49,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f75ce01-31bb-4ccc-86e1-5fafded5f15c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-06 22:19:49,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:19:49,537 INFO L262 TraceCheckSpWp]: Trace formula consists of 644 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-06 22:19:49,542 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:19:50,403 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2380 trivial. 0 not checked. [2023-11-06 22:19:50,403 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:19:50,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:19:50,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497638214] [2023-11-06 22:19:50,403 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:19:50,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498944197] [2023-11-06 22:19:50,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498944197] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:19:50,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:19:50,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-06 22:19:50,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452254648] [2023-11-06 22:19:50,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:19:50,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 22:19:50,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:19:50,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 22:19:50,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:19:50,408 INFO L87 Difference]: Start difference. First operand 49392 states and 76662 transitions. Second operand has 8 states, 8 states have (on average 10.25) internal successors, (82), 7 states have internal predecessors, (82), 1 states have call successors, (35), 1 states have call predecessors, (35), 1 states have return successors, (35), 1 states have call predecessors, (35), 1 states have call successors, (35)