./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-25_file-81.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7823dc0c-8eee-4404-bfc6-1fbb1ef12f30/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7823dc0c-8eee-4404-bfc6-1fbb1ef12f30/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_7823dc0c-8eee-4404-bfc6-1fbb1ef12f30/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7823dc0c-8eee-4404-bfc6-1fbb1ef12f30/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-25_file-81.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7823dc0c-8eee-4404-bfc6-1fbb1ef12f30/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_7823dc0c-8eee-4404-bfc6-1fbb1ef12f30/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 20b89f8a60d2f6d2584628c0d5624c8090542a805d1f710cb23a05b88ce8a600 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 23:12:18,645 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 23:12:18,773 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7823dc0c-8eee-4404-bfc6-1fbb1ef12f30/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 23:12:18,787 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 23:12:18,788 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 23:12:18,828 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 23:12:18,830 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 23:12:18,830 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 23:12:18,831 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 23:12:18,836 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 23:12:18,838 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 23:12:18,839 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 23:12:18,839 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 23:12:18,841 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 23:12:18,842 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 23:12:18,843 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 23:12:18,843 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 23:12:18,844 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 23:12:18,844 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 23:12:18,845 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 23:12:18,845 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 23:12:18,846 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 23:12:18,846 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 23:12:18,847 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 23:12:18,847 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 23:12:18,848 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 23:12:18,849 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 23:12:18,849 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 23:12:18,850 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 23:12:18,851 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 23:12:18,852 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 23:12:18,852 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 23:12:18,853 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 23:12:18,853 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 23:12:18,853 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 23:12:18,854 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 23:12:18,854 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 23:12:18,854 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 23:12:18,855 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 23:12:18,855 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_7823dc0c-8eee-4404-bfc6-1fbb1ef12f30/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7823dc0c-8eee-4404-bfc6-1fbb1ef12f30/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 20b89f8a60d2f6d2584628c0d5624c8090542a805d1f710cb23a05b88ce8a600 [2023-11-06 23:12:19,192 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 23:12:19,220 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 23:12:19,223 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 23:12:19,225 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 23:12:19,239 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 23:12:19,241 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7823dc0c-8eee-4404-bfc6-1fbb1ef12f30/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-25_file-81.i [2023-11-06 23:12:22,362 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 23:12:22,588 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 23:12:22,589 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7823dc0c-8eee-4404-bfc6-1fbb1ef12f30/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-25_file-81.i [2023-11-06 23:12:22,600 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7823dc0c-8eee-4404-bfc6-1fbb1ef12f30/bin/uautomizer-verify-WvqO1wxjHP/data/0ad0f1193/4eb7aec0559b429e9701440615df4f2c/FLAG6b9a816ed [2023-11-06 23:12:22,617 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7823dc0c-8eee-4404-bfc6-1fbb1ef12f30/bin/uautomizer-verify-WvqO1wxjHP/data/0ad0f1193/4eb7aec0559b429e9701440615df4f2c [2023-11-06 23:12:22,620 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 23:12:22,621 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 23:12:22,623 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 23:12:22,623 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 23:12:22,629 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 23:12:22,630 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:12:22" (1/1) ... [2023-11-06 23:12:22,631 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1016d415 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:12:22, skipping insertion in model container [2023-11-06 23:12:22,631 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:12:22" (1/1) ... [2023-11-06 23:12:22,672 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 23:12:22,857 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_7823dc0c-8eee-4404-bfc6-1fbb1ef12f30/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-25_file-81.i[915,928] [2023-11-06 23:12:22,934 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 23:12:22,961 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 23:12:22,987 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_7823dc0c-8eee-4404-bfc6-1fbb1ef12f30/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-25_file-81.i[915,928] [2023-11-06 23:12:23,048 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 23:12:23,067 INFO L206 MainTranslator]: Completed translation [2023-11-06 23:12:23,067 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:12:23 WrapperNode [2023-11-06 23:12:23,068 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 23:12:23,069 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 23:12:23,069 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 23:12:23,069 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 23:12:23,077 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:12:23" (1/1) ... [2023-11-06 23:12:23,091 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:12:23" (1/1) ... [2023-11-06 23:12:23,168 INFO L138 Inliner]: procedures = 26, calls = 54, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 250 [2023-11-06 23:12:23,168 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 23:12:23,169 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 23:12:23,169 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 23:12:23,170 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 23:12:23,180 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:12:23" (1/1) ... [2023-11-06 23:12:23,180 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:12:23" (1/1) ... [2023-11-06 23:12:23,186 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:12:23" (1/1) ... [2023-11-06 23:12:23,186 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:12:23" (1/1) ... [2023-11-06 23:12:23,203 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:12:23" (1/1) ... [2023-11-06 23:12:23,212 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:12:23" (1/1) ... [2023-11-06 23:12:23,217 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:12:23" (1/1) ... [2023-11-06 23:12:23,221 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:12:23" (1/1) ... [2023-11-06 23:12:23,243 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 23:12:23,244 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 23:12:23,244 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 23:12:23,244 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 23:12:23,245 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:12:23" (1/1) ... [2023-11-06 23:12:23,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 23:12:23,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7823dc0c-8eee-4404-bfc6-1fbb1ef12f30/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:12:23,291 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7823dc0c-8eee-4404-bfc6-1fbb1ef12f30/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 23:12:23,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7823dc0c-8eee-4404-bfc6-1fbb1ef12f30/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 23:12:23,337 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 23:12:23,337 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-06 23:12:23,338 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-06 23:12:23,338 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 23:12:23,339 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 23:12:23,339 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 23:12:23,489 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 23:12:23,492 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 23:12:24,043 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 23:12:24,050 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 23:12:24,051 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-06 23:12:24,060 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:12:24 BoogieIcfgContainer [2023-11-06 23:12:24,060 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 23:12:24,065 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 23:12:24,066 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 23:12:24,069 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 23:12:24,069 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 11:12:22" (1/3) ... [2023-11-06 23:12:24,070 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6de87172 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:12:24, skipping insertion in model container [2023-11-06 23:12:24,070 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:12:23" (2/3) ... [2023-11-06 23:12:24,072 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6de87172 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:12:24, skipping insertion in model container [2023-11-06 23:12:24,072 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:12:24" (3/3) ... [2023-11-06 23:12:24,074 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_fillercode_fillercodesize_ps-cn-25_file-81.i [2023-11-06 23:12:24,094 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 23:12:24,094 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 23:12:24,174 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 23:12:24,182 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;@5fa44827, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 23:12:24,183 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-06 23:12:24,188 INFO L276 IsEmpty]: Start isEmpty. Operand has 106 states, 62 states have (on average 1.403225806451613) internal successors, (87), 63 states have internal predecessors, (87), 41 states have call successors, (41), 1 states have call predecessors, (41), 1 states have return successors, (41), 41 states have call predecessors, (41), 41 states have call successors, (41) [2023-11-06 23:12:24,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2023-11-06 23:12:24,211 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:12:24,212 INFO L195 NwaCegarLoop]: trace histogram [41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:12:24,212 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:12:24,220 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:12:24,221 INFO L85 PathProgramCache]: Analyzing trace with hash -418334211, now seen corresponding path program 1 times [2023-11-06 23:12:24,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:12:24,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058490802] [2023-11-06 23:12:24,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:12:24,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:12:24,524 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:12:24,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [873539522] [2023-11-06 23:12:24,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:12:24,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:12:24,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7823dc0c-8eee-4404-bfc6-1fbb1ef12f30/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:12:24,539 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7823dc0c-8eee-4404-bfc6-1fbb1ef12f30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:12:24,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7823dc0c-8eee-4404-bfc6-1fbb1ef12f30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 23:12:24,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:24,849 INFO L262 TraceCheckSpWp]: Trace formula consists of 596 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-06 23:12:24,866 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:12:26,296 INFO L134 CoverageAnalysis]: Checked inductivity of 3280 backedges. 1180 proven. 207 refuted. 0 times theorem prover too weak. 1893 trivial. 0 not checked. [2023-11-06 23:12:26,297 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:12:26,991 INFO L134 CoverageAnalysis]: Checked inductivity of 3280 backedges. 27 proven. 210 refuted. 0 times theorem prover too weak. 3043 trivial. 0 not checked. [2023-11-06 23:12:26,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:12:26,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058490802] [2023-11-06 23:12:26,992 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:12:26,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873539522] [2023-11-06 23:12:26,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873539522] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:12:26,993 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:12:26,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2023-11-06 23:12:26,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703705647] [2023-11-06 23:12:26,997 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:12:27,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-06 23:12:27,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:12:27,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-06 23:12:27,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2023-11-06 23:12:27,038 INFO L87 Difference]: Start difference. First operand has 106 states, 62 states have (on average 1.403225806451613) internal successors, (87), 63 states have internal predecessors, (87), 41 states have call successors, (41), 1 states have call predecessors, (41), 1 states have return successors, (41), 41 states have call predecessors, (41), 41 states have call successors, (41) Second operand has 16 states, 16 states have (on average 6.3125) internal successors, (101), 16 states have internal predecessors, (101), 5 states have call successors, (81), 3 states have call predecessors, (81), 7 states have return successors, (82), 4 states have call predecessors, (82), 5 states have call successors, (82) [2023-11-06 23:12:28,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:12:28,227 INFO L93 Difference]: Finished difference Result 304 states and 537 transitions. [2023-11-06 23:12:28,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-06 23:12:28,230 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 6.3125) internal successors, (101), 16 states have internal predecessors, (101), 5 states have call successors, (81), 3 states have call predecessors, (81), 7 states have return successors, (82), 4 states have call predecessors, (82), 5 states have call successors, (82) Word has length 251 [2023-11-06 23:12:28,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:12:28,244 INFO L225 Difference]: With dead ends: 304 [2023-11-06 23:12:28,244 INFO L226 Difference]: Without dead ends: 201 [2023-11-06 23:12:28,260 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 522 GetRequests, 489 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=356, Invalid=834, Unknown=0, NotChecked=0, Total=1190 [2023-11-06 23:12:28,266 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 336 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 604 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-06 23:12:28,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [339 Valid, 405 Invalid, 750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 604 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-06 23:12:28,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2023-11-06 23:12:28,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 151. [2023-11-06 23:12:28,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 94 states have (on average 1.2872340425531914) internal successors, (121), 95 states have internal predecessors, (121), 51 states have call successors, (51), 5 states have call predecessors, (51), 5 states have return successors, (51), 50 states have call predecessors, (51), 51 states have call successors, (51) [2023-11-06 23:12:28,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 223 transitions. [2023-11-06 23:12:28,375 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 223 transitions. Word has length 251 [2023-11-06 23:12:28,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:12:28,380 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 223 transitions. [2023-11-06 23:12:28,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.3125) internal successors, (101), 16 states have internal predecessors, (101), 5 states have call successors, (81), 3 states have call predecessors, (81), 7 states have return successors, (82), 4 states have call predecessors, (82), 5 states have call successors, (82) [2023-11-06 23:12:28,382 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 223 transitions. [2023-11-06 23:12:28,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2023-11-06 23:12:28,395 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:12:28,396 INFO L195 NwaCegarLoop]: trace histogram [41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:12:28,408 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7823dc0c-8eee-4404-bfc6-1fbb1ef12f30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-06 23:12:28,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7823dc0c-8eee-4404-bfc6-1fbb1ef12f30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-06 23:12:28,608 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:12:28,609 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:12:28,609 INFO L85 PathProgramCache]: Analyzing trace with hash -1965877795, now seen corresponding path program 1 times [2023-11-06 23:12:28,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:12:28,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324509649] [2023-11-06 23:12:28,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:12:28,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:12:28,735 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:12:28,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [75123427] [2023-11-06 23:12:28,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:12:28,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:12:28,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7823dc0c-8eee-4404-bfc6-1fbb1ef12f30/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:12:28,737 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7823dc0c-8eee-4404-bfc6-1fbb1ef12f30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:12:28,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7823dc0c-8eee-4404-bfc6-1fbb1ef12f30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 23:12:28,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:28,928 INFO L262 TraceCheckSpWp]: Trace formula consists of 600 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-06 23:12:28,937 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:12:29,907 INFO L134 CoverageAnalysis]: Checked inductivity of 3280 backedges. 1019 proven. 210 refuted. 0 times theorem prover too weak. 2051 trivial. 0 not checked. [2023-11-06 23:12:29,907 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:12:30,313 INFO L134 CoverageAnalysis]: Checked inductivity of 3280 backedges. 24 proven. 96 refuted. 0 times theorem prover too weak. 3160 trivial. 0 not checked. [2023-11-06 23:12:30,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:12:30,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324509649] [2023-11-06 23:12:30,315 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:12:30,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75123427] [2023-11-06 23:12:30,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75123427] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:12:30,316 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:12:30,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2023-11-06 23:12:30,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705397027] [2023-11-06 23:12:30,317 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:12:30,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-06 23:12:30,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:12:30,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-06 23:12:30,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2023-11-06 23:12:30,325 INFO L87 Difference]: Start difference. First operand 151 states and 223 transitions. Second operand has 17 states, 17 states have (on average 5.9411764705882355) internal successors, (101), 17 states have internal predecessors, (101), 4 states have call successors, (80), 3 states have call predecessors, (80), 6 states have return successors, (81), 4 states have call predecessors, (81), 4 states have call successors, (81) [2023-11-06 23:12:32,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:12:32,586 INFO L93 Difference]: Finished difference Result 563 states and 799 transitions. [2023-11-06 23:12:32,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-11-06 23:12:32,588 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.9411764705882355) internal successors, (101), 17 states have internal predecessors, (101), 4 states have call successors, (80), 3 states have call predecessors, (80), 6 states have return successors, (81), 4 states have call predecessors, (81), 4 states have call successors, (81) Word has length 252 [2023-11-06 23:12:32,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:12:32,595 INFO L225 Difference]: With dead ends: 563 [2023-11-06 23:12:32,595 INFO L226 Difference]: Without dead ends: 415 [2023-11-06 23:12:32,597 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 541 GetRequests, 490 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 669 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=599, Invalid=2157, Unknown=0, NotChecked=0, Total=2756 [2023-11-06 23:12:32,599 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 745 mSDsluCounter, 691 mSDsCounter, 0 mSdLazyCounter, 1246 mSolverCounterSat, 502 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 747 SdHoareTripleChecker+Valid, 873 SdHoareTripleChecker+Invalid, 1748 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 502 IncrementalHoareTripleChecker+Valid, 1246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-06 23:12:32,600 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [747 Valid, 873 Invalid, 1748 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [502 Valid, 1246 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-06 23:12:32,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2023-11-06 23:12:32,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 261. [2023-11-06 23:12:32,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 167 states have (on average 1.1676646706586826) internal successors, (195), 170 states have internal predecessors, (195), 72 states have call successors, (72), 21 states have call predecessors, (72), 21 states have return successors, (72), 69 states have call predecessors, (72), 72 states have call successors, (72) [2023-11-06 23:12:32,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 339 transitions. [2023-11-06 23:12:32,686 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 339 transitions. Word has length 252 [2023-11-06 23:12:32,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:12:32,690 INFO L495 AbstractCegarLoop]: Abstraction has 261 states and 339 transitions. [2023-11-06 23:12:32,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.9411764705882355) internal successors, (101), 17 states have internal predecessors, (101), 4 states have call successors, (80), 3 states have call predecessors, (80), 6 states have return successors, (81), 4 states have call predecessors, (81), 4 states have call successors, (81) [2023-11-06 23:12:32,692 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 339 transitions. [2023-11-06 23:12:32,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2023-11-06 23:12:32,696 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:12:32,696 INFO L195 NwaCegarLoop]: trace histogram [41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:12:32,708 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7823dc0c-8eee-4404-bfc6-1fbb1ef12f30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 23:12:32,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7823dc0c-8eee-4404-bfc6-1fbb1ef12f30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:12:32,904 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:12:32,904 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:12:32,904 INFO L85 PathProgramCache]: Analyzing trace with hash 409338876, now seen corresponding path program 1 times [2023-11-06 23:12:32,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:12:32,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511911059] [2023-11-06 23:12:32,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:12:32,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:12:32,992 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:12:33,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [347105168] [2023-11-06 23:12:33,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:12:33,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:12:33,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7823dc0c-8eee-4404-bfc6-1fbb1ef12f30/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:12:33,005 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7823dc0c-8eee-4404-bfc6-1fbb1ef12f30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:12:33,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7823dc0c-8eee-4404-bfc6-1fbb1ef12f30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 23:12:33,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:33,199 INFO L262 TraceCheckSpWp]: Trace formula consists of 598 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-06 23:12:33,207 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:12:34,120 INFO L134 CoverageAnalysis]: Checked inductivity of 3280 backedges. 40 proven. 120 refuted. 0 times theorem prover too weak. 3120 trivial. 0 not checked. [2023-11-06 23:12:34,121 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:12:34,822 INFO L134 CoverageAnalysis]: Checked inductivity of 3280 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 3160 trivial. 0 not checked. [2023-11-06 23:12:34,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:12:34,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511911059] [2023-11-06 23:12:34,823 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:12:34,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347105168] [2023-11-06 23:12:34,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347105168] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:12:34,823 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:12:34,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 16 [2023-11-06 23:12:34,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576531206] [2023-11-06 23:12:34,825 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:12:34,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-06 23:12:34,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:12:34,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-06 23:12:34,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2023-11-06 23:12:34,829 INFO L87 Difference]: Start difference. First operand 261 states and 339 transitions. Second operand has 16 states, 16 states have (on average 5.8125) internal successors, (93), 16 states have internal predecessors, (93), 4 states have call successors, (82), 3 states have call predecessors, (82), 4 states have return successors, (82), 2 states have call predecessors, (82), 4 states have call successors, (82) [2023-11-06 23:12:36,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:12:36,957 INFO L93 Difference]: Finished difference Result 705 states and 953 transitions. [2023-11-06 23:12:36,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-06 23:12:36,958 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.8125) internal successors, (93), 16 states have internal predecessors, (93), 4 states have call successors, (82), 3 states have call predecessors, (82), 4 states have return successors, (82), 2 states have call predecessors, (82), 4 states have call successors, (82) Word has length 253 [2023-11-06 23:12:36,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:12:36,963 INFO L225 Difference]: With dead ends: 705 [2023-11-06 23:12:36,964 INFO L226 Difference]: Without dead ends: 483 [2023-11-06 23:12:36,966 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 533 GetRequests, 496 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=406, Invalid=1076, Unknown=0, NotChecked=0, Total=1482 [2023-11-06 23:12:36,967 INFO L413 NwaCegarLoop]: 225 mSDtfsCounter, 711 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 846 mSolverCounterSat, 589 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 711 SdHoareTripleChecker+Valid, 697 SdHoareTripleChecker+Invalid, 1435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 589 IncrementalHoareTripleChecker+Valid, 846 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-06 23:12:36,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [711 Valid, 697 Invalid, 1435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [589 Valid, 846 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-06 23:12:36,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2023-11-06 23:12:37,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 261. [2023-11-06 23:12:37,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 167 states have (on average 1.155688622754491) internal successors, (193), 170 states have internal predecessors, (193), 72 states have call successors, (72), 21 states have call predecessors, (72), 21 states have return successors, (72), 69 states have call predecessors, (72), 72 states have call successors, (72) [2023-11-06 23:12:37,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 337 transitions. [2023-11-06 23:12:37,075 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 337 transitions. Word has length 253 [2023-11-06 23:12:37,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:12:37,078 INFO L495 AbstractCegarLoop]: Abstraction has 261 states and 337 transitions. [2023-11-06 23:12:37,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.8125) internal successors, (93), 16 states have internal predecessors, (93), 4 states have call successors, (82), 3 states have call predecessors, (82), 4 states have return successors, (82), 2 states have call predecessors, (82), 4 states have call successors, (82) [2023-11-06 23:12:37,079 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 337 transitions. [2023-11-06 23:12:37,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2023-11-06 23:12:37,084 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:12:37,084 INFO L195 NwaCegarLoop]: trace histogram [41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:12:37,096 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7823dc0c-8eee-4404-bfc6-1fbb1ef12f30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-06 23:12:37,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7823dc0c-8eee-4404-bfc6-1fbb1ef12f30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:12:37,292 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:12:37,293 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:12:37,293 INFO L85 PathProgramCache]: Analyzing trace with hash -611729478, now seen corresponding path program 1 times [2023-11-06 23:12:37,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:12:37,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547741525] [2023-11-06 23:12:37,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:12:37,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:12:37,369 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:12:37,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [430368727] [2023-11-06 23:12:37,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:12:37,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:12:37,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7823dc0c-8eee-4404-bfc6-1fbb1ef12f30/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:12:37,371 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7823dc0c-8eee-4404-bfc6-1fbb1ef12f30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:12:37,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7823dc0c-8eee-4404-bfc6-1fbb1ef12f30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 23:12:37,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:37,610 INFO L262 TraceCheckSpWp]: Trace formula consists of 598 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-06 23:12:37,618 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:12:49,883 INFO L134 CoverageAnalysis]: Checked inductivity of 3280 backedges. 82 proven. 234 refuted. 0 times theorem prover too weak. 2964 trivial. 0 not checked. [2023-11-06 23:12:49,883 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:12:58,170 INFO L134 CoverageAnalysis]: Checked inductivity of 3280 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3280 trivial. 0 not checked. [2023-11-06 23:12:58,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:12:58,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547741525] [2023-11-06 23:12:58,171 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:12:58,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430368727] [2023-11-06 23:12:58,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430368727] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 23:12:58,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 23:12:58,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [16] total 23 [2023-11-06 23:12:58,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468089567] [2023-11-06 23:12:58,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:12:58,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-06 23:12:58,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:12:58,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-06 23:12:58,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2023-11-06 23:12:58,174 INFO L87 Difference]: Start difference. First operand 261 states and 337 transitions. Second operand has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 9 states have internal predecessors, (51), 1 states have call successors, (41), 1 states have call predecessors, (41), 1 states have return successors, (41), 1 states have call predecessors, (41), 1 states have call successors, (41) [2023-11-06 23:13:00,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:13:00,088 INFO L93 Difference]: Finished difference Result 559 states and 720 transitions. [2023-11-06 23:13:00,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-06 23:13:00,092 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 9 states have internal predecessors, (51), 1 states have call successors, (41), 1 states have call predecessors, (41), 1 states have return successors, (41), 1 states have call predecessors, (41), 1 states have call successors, (41) Word has length 253 [2023-11-06 23:13:00,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:13:00,095 INFO L225 Difference]: With dead ends: 559 [2023-11-06 23:13:00,095 INFO L226 Difference]: Without dead ends: 337 [2023-11-06 23:13:00,097 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 510 GetRequests, 483 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=173, Invalid=639, Unknown=0, NotChecked=0, Total=812 [2023-11-06 23:13:00,101 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 151 mSDsluCounter, 674 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 820 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-06 23:13:00,102 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 820 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-06 23:13:00,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2023-11-06 23:13:00,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 273. [2023-11-06 23:13:00,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 179 states have (on average 1.1675977653631284) internal successors, (209), 182 states have internal predecessors, (209), 72 states have call successors, (72), 21 states have call predecessors, (72), 21 states have return successors, (72), 69 states have call predecessors, (72), 72 states have call successors, (72) [2023-11-06 23:13:00,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 353 transitions. [2023-11-06 23:13:00,162 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 353 transitions. Word has length 253 [2023-11-06 23:13:00,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:13:00,163 INFO L495 AbstractCegarLoop]: Abstraction has 273 states and 353 transitions. [2023-11-06 23:13:00,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 9 states have internal predecessors, (51), 1 states have call successors, (41), 1 states have call predecessors, (41), 1 states have return successors, (41), 1 states have call predecessors, (41), 1 states have call successors, (41) [2023-11-06 23:13:00,164 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 353 transitions. [2023-11-06 23:13:00,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2023-11-06 23:13:00,168 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:13:00,168 INFO L195 NwaCegarLoop]: trace histogram [41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:13:00,182 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7823dc0c-8eee-4404-bfc6-1fbb1ef12f30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 23:13:00,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7823dc0c-8eee-4404-bfc6-1fbb1ef12f30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:13:00,375 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:13:00,376 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:13:00,376 INFO L85 PathProgramCache]: Analyzing trace with hash -353564040, now seen corresponding path program 1 times [2023-11-06 23:13:00,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:13:00,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011547515] [2023-11-06 23:13:00,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:13:00,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:13:00,411 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:13:00,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [131578850] [2023-11-06 23:13:00,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:13:00,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:13:00,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7823dc0c-8eee-4404-bfc6-1fbb1ef12f30/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:13:00,413 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7823dc0c-8eee-4404-bfc6-1fbb1ef12f30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:13:00,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7823dc0c-8eee-4404-bfc6-1fbb1ef12f30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 23:13:00,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:13:00,594 INFO L262 TraceCheckSpWp]: Trace formula consists of 597 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 23:13:00,599 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:13:00,629 INFO L134 CoverageAnalysis]: Checked inductivity of 3280 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3280 trivial. 0 not checked. [2023-11-06 23:13:00,630 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:13:00,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:13:00,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011547515] [2023-11-06 23:13:00,630 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:13:00,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131578850] [2023-11-06 23:13:00,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131578850] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:13:00,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:13:00,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 23:13:00,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898909282] [2023-11-06 23:13:00,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:13:00,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:13:00,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:13:00,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:13:00,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:13:00,634 INFO L87 Difference]: Start difference. First operand 273 states and 353 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 1 states have call successors, (41), 1 states have call predecessors, (41), 1 states have return successors, (41), 1 states have call predecessors, (41), 1 states have call successors, (41) [2023-11-06 23:13:00,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:13:00,759 INFO L93 Difference]: Finished difference Result 613 states and 780 transitions. [2023-11-06 23:13:00,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:13:00,760 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 1 states have call successors, (41), 1 states have call predecessors, (41), 1 states have return successors, (41), 1 states have call predecessors, (41), 1 states have call successors, (41) Word has length 253 [2023-11-06 23:13:00,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:13:00,763 INFO L225 Difference]: With dead ends: 613 [2023-11-06 23:13:00,763 INFO L226 Difference]: Without dead ends: 379 [2023-11-06 23:13:00,764 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 251 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 23:13:00,765 INFO L413 NwaCegarLoop]: 167 mSDtfsCounter, 30 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 23:13:00,766 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 313 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 23:13:00,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2023-11-06 23:13:00,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 374. [2023-11-06 23:13:00,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 258 states have (on average 1.1472868217054264) internal successors, (296), 264 states have internal predecessors, (296), 84 states have call successors, (84), 31 states have call predecessors, (84), 31 states have return successors, (84), 78 states have call predecessors, (84), 84 states have call successors, (84) [2023-11-06 23:13:00,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 464 transitions. [2023-11-06 23:13:00,846 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 464 transitions. Word has length 253 [2023-11-06 23:13:00,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:13:00,847 INFO L495 AbstractCegarLoop]: Abstraction has 374 states and 464 transitions. [2023-11-06 23:13:00,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 1 states have call successors, (41), 1 states have call predecessors, (41), 1 states have return successors, (41), 1 states have call predecessors, (41), 1 states have call successors, (41) [2023-11-06 23:13:00,847 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 464 transitions. [2023-11-06 23:13:00,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2023-11-06 23:13:00,852 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:13:00,852 INFO L195 NwaCegarLoop]: trace histogram [41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:13:00,859 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7823dc0c-8eee-4404-bfc6-1fbb1ef12f30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 23:13:01,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7823dc0c-8eee-4404-bfc6-1fbb1ef12f30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:13:01,059 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:13:01,059 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:13:01,060 INFO L85 PathProgramCache]: Analyzing trace with hash -2128571402, now seen corresponding path program 1 times [2023-11-06 23:13:01,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:13:01,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207179574] [2023-11-06 23:13:01,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:13:01,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:13:01,091 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:13:01,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1483604386] [2023-11-06 23:13:01,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:13:01,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:13:01,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7823dc0c-8eee-4404-bfc6-1fbb1ef12f30/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:13:01,093 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7823dc0c-8eee-4404-bfc6-1fbb1ef12f30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:13:01,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7823dc0c-8eee-4404-bfc6-1fbb1ef12f30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 23:13:01,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:13:01,309 INFO L262 TraceCheckSpWp]: Trace formula consists of 600 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 23:13:01,320 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:13:01,350 INFO L134 CoverageAnalysis]: Checked inductivity of 3280 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3280 trivial. 0 not checked. [2023-11-06 23:13:01,350 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:13:01,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:13:01,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207179574] [2023-11-06 23:13:01,351 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:13:01,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483604386] [2023-11-06 23:13:01,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483604386] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:13:01,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:13:01,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 23:13:01,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76457193] [2023-11-06 23:13:01,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:13:01,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:13:01,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:13:01,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:13:01,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:13:01,353 INFO L87 Difference]: Start difference. First operand 374 states and 464 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 1 states have call successors, (41), 1 states have call predecessors, (41), 1 states have return successors, (41), 1 states have call predecessors, (41), 1 states have call successors, (41) [2023-11-06 23:13:01,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:13:01,594 INFO L93 Difference]: Finished difference Result 722 states and 896 transitions. [2023-11-06 23:13:01,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 23:13:01,595 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 1 states have call successors, (41), 1 states have call predecessors, (41), 1 states have return successors, (41), 1 states have call predecessors, (41), 1 states have call successors, (41) Word has length 253 [2023-11-06 23:13:01,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:13:01,598 INFO L225 Difference]: With dead ends: 722 [2023-11-06 23:13:01,599 INFO L226 Difference]: Without dead ends: 391 [2023-11-06 23:13:01,600 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 250 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 23:13:01,601 INFO L413 NwaCegarLoop]: 165 mSDtfsCounter, 67 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 23:13:01,601 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 449 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 23:13:01,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2023-11-06 23:13:01,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 303. [2023-11-06 23:13:01,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 205 states have (on average 1.1317073170731706) internal successors, (232), 208 states have internal predecessors, (232), 72 states have call successors, (72), 25 states have call predecessors, (72), 25 states have return successors, (72), 69 states have call predecessors, (72), 72 states have call successors, (72) [2023-11-06 23:13:01,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 376 transitions. [2023-11-06 23:13:01,681 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 376 transitions. Word has length 253 [2023-11-06 23:13:01,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:13:01,682 INFO L495 AbstractCegarLoop]: Abstraction has 303 states and 376 transitions. [2023-11-06 23:13:01,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 1 states have call successors, (41), 1 states have call predecessors, (41), 1 states have return successors, (41), 1 states have call predecessors, (41), 1 states have call successors, (41) [2023-11-06 23:13:01,683 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 376 transitions. [2023-11-06 23:13:01,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2023-11-06 23:13:01,685 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:13:01,685 INFO L195 NwaCegarLoop]: trace histogram [41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:13:01,696 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7823dc0c-8eee-4404-bfc6-1fbb1ef12f30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 23:13:01,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7823dc0c-8eee-4404-bfc6-1fbb1ef12f30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-06 23:13:01,892 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:13:01,893 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:13:01,893 INFO L85 PathProgramCache]: Analyzing trace with hash -1198535492, now seen corresponding path program 1 times [2023-11-06 23:13:01,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:13:01,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214304324] [2023-11-06 23:13:01,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:13:01,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:13:01,931 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:13:01,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1418147321] [2023-11-06 23:13:01,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:13:01,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:13:01,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7823dc0c-8eee-4404-bfc6-1fbb1ef12f30/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:13:01,951 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7823dc0c-8eee-4404-bfc6-1fbb1ef12f30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:13:01,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7823dc0c-8eee-4404-bfc6-1fbb1ef12f30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 23:13:02,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:13:02,189 INFO L262 TraceCheckSpWp]: Trace formula consists of 595 conjuncts, 65 conjunts are in the unsatisfiable core [2023-11-06 23:13:02,203 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:13:32,479 INFO L134 CoverageAnalysis]: Checked inductivity of 3280 backedges. 1290 proven. 723 refuted. 0 times theorem prover too weak. 1267 trivial. 0 not checked. [2023-11-06 23:13:32,479 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:13:40,743 INFO L134 CoverageAnalysis]: Checked inductivity of 3280 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3280 trivial. 0 not checked. [2023-11-06 23:13:40,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:13:40,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214304324] [2023-11-06 23:13:40,744 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:13:40,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418147321] [2023-11-06 23:13:40,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418147321] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 23:13:40,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 23:13:40,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [37] total 44 [2023-11-06 23:13:40,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189063425] [2023-11-06 23:13:40,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:13:40,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-06 23:13:40,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:13:40,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-06 23:13:40,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=399, Invalid=1493, Unknown=0, NotChecked=0, Total=1892 [2023-11-06 23:13:40,748 INFO L87 Difference]: Start difference. First operand 303 states and 376 transitions. Second operand has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 9 states have internal predecessors, (51), 1 states have call successors, (41), 1 states have call predecessors, (41), 1 states have return successors, (41), 1 states have call predecessors, (41), 1 states have call successors, (41) [2023-11-06 23:13:42,459 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-06 23:13:43,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:13:43,341 INFO L93 Difference]: Finished difference Result 608 states and 752 transitions. [2023-11-06 23:13:43,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-06 23:13:43,343 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 9 states have internal predecessors, (51), 1 states have call successors, (41), 1 states have call predecessors, (41), 1 states have return successors, (41), 1 states have call predecessors, (41), 1 states have call successors, (41) Word has length 253 [2023-11-06 23:13:43,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:13:43,346 INFO L225 Difference]: With dead ends: 608 [2023-11-06 23:13:43,346 INFO L226 Difference]: Without dead ends: 348 [2023-11-06 23:13:43,349 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 509 GetRequests, 462 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 652 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=441, Invalid=1911, Unknown=0, NotChecked=0, Total=2352 [2023-11-06 23:13:43,349 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 169 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 576 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-11-06 23:13:43,350 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 576 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-11-06 23:13:43,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2023-11-06 23:13:43,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 303. [2023-11-06 23:13:43,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 205 states have (on average 1.1317073170731706) internal successors, (232), 208 states have internal predecessors, (232), 72 states have call successors, (72), 25 states have call predecessors, (72), 25 states have return successors, (72), 69 states have call predecessors, (72), 72 states have call successors, (72) [2023-11-06 23:13:43,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 376 transitions. [2023-11-06 23:13:43,423 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 376 transitions. Word has length 253 [2023-11-06 23:13:43,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:13:43,424 INFO L495 AbstractCegarLoop]: Abstraction has 303 states and 376 transitions. [2023-11-06 23:13:43,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 9 states have internal predecessors, (51), 1 states have call successors, (41), 1 states have call predecessors, (41), 1 states have return successors, (41), 1 states have call predecessors, (41), 1 states have call successors, (41) [2023-11-06 23:13:43,424 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 376 transitions. [2023-11-06 23:13:43,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2023-11-06 23:13:43,427 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:13:43,427 INFO L195 NwaCegarLoop]: trace histogram [41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:13:43,434 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7823dc0c-8eee-4404-bfc6-1fbb1ef12f30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 23:13:43,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7823dc0c-8eee-4404-bfc6-1fbb1ef12f30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-06 23:13:43,634 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:13:43,635 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:13:43,635 INFO L85 PathProgramCache]: Analyzing trace with hash -1622846728, now seen corresponding path program 1 times [2023-11-06 23:13:43,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:13:43,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659411948] [2023-11-06 23:13:43,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:13:43,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:13:43,671 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:13:43,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1772999482] [2023-11-06 23:13:43,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:13:43,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:13:43,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7823dc0c-8eee-4404-bfc6-1fbb1ef12f30/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:13:43,673 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7823dc0c-8eee-4404-bfc6-1fbb1ef12f30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:13:43,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7823dc0c-8eee-4404-bfc6-1fbb1ef12f30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 23:13:43,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:13:43,901 INFO L262 TraceCheckSpWp]: Trace formula consists of 597 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-06 23:13:43,908 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:13:45,271 INFO L134 CoverageAnalysis]: Checked inductivity of 3280 backedges. 40 proven. 120 refuted. 0 times theorem prover too weak. 3120 trivial. 0 not checked. [2023-11-06 23:13:45,272 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:13:46,369 INFO L134 CoverageAnalysis]: Checked inductivity of 3280 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 3160 trivial. 0 not checked. [2023-11-06 23:13:46,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:13:46,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659411948] [2023-11-06 23:13:46,370 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:13:46,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772999482] [2023-11-06 23:13:46,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772999482] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:13:46,370 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:13:46,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2023-11-06 23:13:46,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785328899] [2023-11-06 23:13:46,370 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:13:46,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-06 23:13:46,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:13:46,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-06 23:13:46,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2023-11-06 23:13:46,373 INFO L87 Difference]: Start difference. First operand 303 states and 376 transitions. Second operand has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 4 states have call successors, (82), 3 states have call predecessors, (82), 4 states have return successors, (82), 2 states have call predecessors, (82), 4 states have call successors, (82) [2023-11-06 23:13:48,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:13:48,325 INFO L93 Difference]: Finished difference Result 731 states and 926 transitions. [2023-11-06 23:13:48,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-06 23:13:48,326 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 4 states have call successors, (82), 3 states have call predecessors, (82), 4 states have return successors, (82), 2 states have call predecessors, (82), 4 states have call successors, (82) Word has length 253 [2023-11-06 23:13:48,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:13:48,330 INFO L225 Difference]: With dead ends: 731 [2023-11-06 23:13:48,330 INFO L226 Difference]: Without dead ends: 471 [2023-11-06 23:13:48,332 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 520 GetRequests, 490 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=264, Invalid=728, Unknown=0, NotChecked=0, Total=992 [2023-11-06 23:13:48,333 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 357 mSDsluCounter, 719 mSDsCounter, 0 mSdLazyCounter, 1200 mSolverCounterSat, 276 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 397 SdHoareTripleChecker+Valid, 832 SdHoareTripleChecker+Invalid, 1476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 276 IncrementalHoareTripleChecker+Valid, 1200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-06 23:13:48,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [397 Valid, 832 Invalid, 1476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [276 Valid, 1200 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-06 23:13:48,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2023-11-06 23:13:48,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 378. [2023-11-06 23:13:48,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 247 states have (on average 1.145748987854251) internal successors, (283), 249 states have internal predecessors, (283), 103 states have call successors, (103), 27 states have call predecessors, (103), 27 states have return successors, (103), 101 states have call predecessors, (103), 103 states have call successors, (103) [2023-11-06 23:13:48,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 489 transitions. [2023-11-06 23:13:48,458 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 489 transitions. Word has length 253 [2023-11-06 23:13:48,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:13:48,459 INFO L495 AbstractCegarLoop]: Abstraction has 378 states and 489 transitions. [2023-11-06 23:13:48,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 4 states have call successors, (82), 3 states have call predecessors, (82), 4 states have return successors, (82), 2 states have call predecessors, (82), 4 states have call successors, (82) [2023-11-06 23:13:48,460 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 489 transitions. [2023-11-06 23:13:48,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2023-11-06 23:13:48,462 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:13:48,463 INFO L195 NwaCegarLoop]: trace histogram [41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:13:48,469 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7823dc0c-8eee-4404-bfc6-1fbb1ef12f30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 23:13:48,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7823dc0c-8eee-4404-bfc6-1fbb1ef12f30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-06 23:13:48,665 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:13:48,665 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:13:48,665 INFO L85 PathProgramCache]: Analyzing trace with hash -301660611, now seen corresponding path program 1 times [2023-11-06 23:13:48,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:13:48,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900432147] [2023-11-06 23:13:48,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:13:48,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:13:48,708 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:13:48,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [27870981] [2023-11-06 23:13:48,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:13:48,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:13:48,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7823dc0c-8eee-4404-bfc6-1fbb1ef12f30/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:13:48,710 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7823dc0c-8eee-4404-bfc6-1fbb1ef12f30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:13:48,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7823dc0c-8eee-4404-bfc6-1fbb1ef12f30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 23:13:48,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:13:48,881 INFO L262 TraceCheckSpWp]: Trace formula consists of 596 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 23:13:48,885 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:13:48,910 INFO L134 CoverageAnalysis]: Checked inductivity of 3280 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3280 trivial. 0 not checked. [2023-11-06 23:13:48,911 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:13:48,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:13:48,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900432147] [2023-11-06 23:13:48,911 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:13:48,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27870981] [2023-11-06 23:13:48,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27870981] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:13:48,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:13:48,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 23:13:48,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746635179] [2023-11-06 23:13:48,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:13:48,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:13:48,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:13:48,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:13:48,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:13:48,914 INFO L87 Difference]: Start difference. First operand 378 states and 489 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 1 states have call successors, (41), 1 states have call predecessors, (41), 1 states have return successors, (41), 1 states have call predecessors, (41), 1 states have call successors, (41) [2023-11-06 23:13:49,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:13:49,085 INFO L93 Difference]: Finished difference Result 662 states and 843 transitions. [2023-11-06 23:13:49,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 23:13:49,086 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 1 states have call successors, (41), 1 states have call predecessors, (41), 1 states have return successors, (41), 1 states have call predecessors, (41), 1 states have call successors, (41) Word has length 253 [2023-11-06 23:13:49,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:13:49,090 INFO L225 Difference]: With dead ends: 662 [2023-11-06 23:13:49,090 INFO L226 Difference]: Without dead ends: 402 [2023-11-06 23:13:49,091 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 250 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 23:13:49,092 INFO L413 NwaCegarLoop]: 163 mSDtfsCounter, 57 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 23:13:49,092 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 432 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 23:13:49,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2023-11-06 23:13:49,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 371. [2023-11-06 23:13:49,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 240 states have (on average 1.1416666666666666) internal successors, (274), 242 states have internal predecessors, (274), 103 states have call successors, (103), 27 states have call predecessors, (103), 27 states have return successors, (103), 101 states have call predecessors, (103), 103 states have call successors, (103) [2023-11-06 23:13:49,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 480 transitions. [2023-11-06 23:13:49,213 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 480 transitions. Word has length 253 [2023-11-06 23:13:49,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:13:49,213 INFO L495 AbstractCegarLoop]: Abstraction has 371 states and 480 transitions. [2023-11-06 23:13:49,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 1 states have call successors, (41), 1 states have call predecessors, (41), 1 states have return successors, (41), 1 states have call predecessors, (41), 1 states have call successors, (41) [2023-11-06 23:13:49,213 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 480 transitions. [2023-11-06 23:13:49,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2023-11-06 23:13:49,216 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:13:49,216 INFO L195 NwaCegarLoop]: trace histogram [41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:13:49,222 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7823dc0c-8eee-4404-bfc6-1fbb1ef12f30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-06 23:13:49,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7823dc0c-8eee-4404-bfc6-1fbb1ef12f30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-06 23:13:49,417 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:13:49,417 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:13:49,418 INFO L85 PathProgramCache]: Analyzing trace with hash -1375603395, now seen corresponding path program 1 times [2023-11-06 23:13:49,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:13:49,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836425147] [2023-11-06 23:13:49,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:13:49,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:13:49,447 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:13:49,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1295880026] [2023-11-06 23:13:49,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:13:49,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:13:49,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7823dc0c-8eee-4404-bfc6-1fbb1ef12f30/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:13:49,449 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7823dc0c-8eee-4404-bfc6-1fbb1ef12f30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:13:49,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7823dc0c-8eee-4404-bfc6-1fbb1ef12f30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 23:13:49,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:13:49,692 INFO L262 TraceCheckSpWp]: Trace formula consists of 598 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-06 23:13:49,701 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:13:53,173 INFO L134 CoverageAnalysis]: Checked inductivity of 3280 backedges. 1102 proven. 318 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2023-11-06 23:13:53,173 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:13:59,604 INFO L134 CoverageAnalysis]: Checked inductivity of 3280 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3280 trivial. 0 not checked. [2023-11-06 23:13:59,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:13:59,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836425147] [2023-11-06 23:13:59,605 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:13:59,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295880026] [2023-11-06 23:13:59,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295880026] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 23:13:59,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 23:13:59,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [19] total 26 [2023-11-06 23:13:59,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246987993] [2023-11-06 23:13:59,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:13:59,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 23:13:59,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:13:59,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 23:13:59,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=499, Unknown=0, NotChecked=0, Total=650 [2023-11-06 23:13:59,610 INFO L87 Difference]: Start difference. First operand 371 states and 480 transitions. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 1 states have call successors, (41), 1 states have call predecessors, (41), 1 states have return successors, (41), 1 states have call predecessors, (41), 1 states have call successors, (41) [2023-11-06 23:14:01,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:14:01,500 INFO L93 Difference]: Finished difference Result 666 states and 849 transitions. [2023-11-06 23:14:01,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-06 23:14:01,507 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 1 states have call successors, (41), 1 states have call predecessors, (41), 1 states have return successors, (41), 1 states have call predecessors, (41), 1 states have call successors, (41) Word has length 253 [2023-11-06 23:14:01,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:14:01,510 INFO L225 Difference]: With dead ends: 666 [2023-11-06 23:14:01,510 INFO L226 Difference]: Without dead ends: 413 [2023-11-06 23:14:01,512 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 513 GetRequests, 480 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=269, Invalid=921, Unknown=0, NotChecked=0, Total=1190 [2023-11-06 23:14:01,513 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 159 mSDsluCounter, 535 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 690 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-06 23:14:01,513 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 690 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-06 23:14:01,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2023-11-06 23:14:01,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 379. [2023-11-06 23:14:01,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 248 states have (on average 1.1451612903225807) internal successors, (284), 250 states have internal predecessors, (284), 103 states have call successors, (103), 27 states have call predecessors, (103), 27 states have return successors, (103), 101 states have call predecessors, (103), 103 states have call successors, (103) [2023-11-06 23:14:01,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 490 transitions. [2023-11-06 23:14:01,622 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 490 transitions. Word has length 253 [2023-11-06 23:14:01,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:14:01,623 INFO L495 AbstractCegarLoop]: Abstraction has 379 states and 490 transitions. [2023-11-06 23:14:01,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 1 states have call successors, (41), 1 states have call predecessors, (41), 1 states have return successors, (41), 1 states have call predecessors, (41), 1 states have call successors, (41) [2023-11-06 23:14:01,624 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 490 transitions. [2023-11-06 23:14:01,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2023-11-06 23:14:01,626 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:14:01,626 INFO L195 NwaCegarLoop]: trace histogram [41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:14:01,633 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7823dc0c-8eee-4404-bfc6-1fbb1ef12f30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-06 23:14:01,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7823dc0c-8eee-4404-bfc6-1fbb1ef12f30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-06 23:14:01,834 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:14:01,834 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:14:01,834 INFO L85 PathProgramCache]: Analyzing trace with hash -1117437957, now seen corresponding path program 1 times [2023-11-06 23:14:01,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:14:01,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281285477] [2023-11-06 23:14:01,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:14:01,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:14:01,879 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:14:01,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [854203430] [2023-11-06 23:14:01,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:14:01,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:14:01,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7823dc0c-8eee-4404-bfc6-1fbb1ef12f30/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:14:01,881 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7823dc0c-8eee-4404-bfc6-1fbb1ef12f30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:14:01,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7823dc0c-8eee-4404-bfc6-1fbb1ef12f30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-06 23:14:02,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:14:02,105 INFO L262 TraceCheckSpWp]: Trace formula consists of 595 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-06 23:14:02,113 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:14:05,374 INFO L134 CoverageAnalysis]: Checked inductivity of 3280 backedges. 1102 proven. 318 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2023-11-06 23:14:05,375 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:14:13,274 INFO L134 CoverageAnalysis]: Checked inductivity of 3280 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3280 trivial. 0 not checked. [2023-11-06 23:14:13,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:14:13,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281285477] [2023-11-06 23:14:13,275 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:14:13,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854203430] [2023-11-06 23:14:13,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854203430] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 23:14:13,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 23:14:13,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [19] total 26 [2023-11-06 23:14:13,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958269839] [2023-11-06 23:14:13,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:14:13,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 23:14:13,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:14:13,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 23:14:13,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=499, Unknown=0, NotChecked=0, Total=650 [2023-11-06 23:14:13,278 INFO L87 Difference]: Start difference. First operand 379 states and 490 transitions. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 1 states have call successors, (41), 1 states have call predecessors, (41), 1 states have return successors, (41), 1 states have call predecessors, (41), 1 states have call successors, (41) [2023-11-06 23:14:15,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:14:15,168 INFO L93 Difference]: Finished difference Result 674 states and 858 transitions. [2023-11-06 23:14:15,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-06 23:14:15,169 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 1 states have call successors, (41), 1 states have call predecessors, (41), 1 states have return successors, (41), 1 states have call predecessors, (41), 1 states have call successors, (41) Word has length 253 [2023-11-06 23:14:15,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:14:15,171 INFO L225 Difference]: With dead ends: 674 [2023-11-06 23:14:15,171 INFO L226 Difference]: Without dead ends: 413 [2023-11-06 23:14:15,172 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 513 GetRequests, 480 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=269, Invalid=921, Unknown=0, NotChecked=0, Total=1190 [2023-11-06 23:14:15,173 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 150 mSDsluCounter, 733 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 883 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-06 23:14:15,173 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 883 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-06 23:14:15,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2023-11-06 23:14:15,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 379. [2023-11-06 23:14:15,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 248 states have (on average 1.1451612903225807) internal successors, (284), 250 states have internal predecessors, (284), 103 states have call successors, (103), 27 states have call predecessors, (103), 27 states have return successors, (103), 101 states have call predecessors, (103), 103 states have call successors, (103) [2023-11-06 23:14:15,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 490 transitions. [2023-11-06 23:14:15,317 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 490 transitions. Word has length 253 [2023-11-06 23:14:15,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:14:15,318 INFO L495 AbstractCegarLoop]: Abstraction has 379 states and 490 transitions. [2023-11-06 23:14:15,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 1 states have call successors, (41), 1 states have call predecessors, (41), 1 states have return successors, (41), 1 states have call predecessors, (41), 1 states have call successors, (41) [2023-11-06 23:14:15,319 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 490 transitions. [2023-11-06 23:14:15,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2023-11-06 23:14:15,321 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:14:15,321 INFO L195 NwaCegarLoop]: trace histogram [41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:14:15,333 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7823dc0c-8eee-4404-bfc6-1fbb1ef12f30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-06 23:14:15,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7823dc0c-8eee-4404-bfc6-1fbb1ef12f30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:14:15,528 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:14:15,528 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:14:15,529 INFO L85 PathProgramCache]: Analyzing trace with hash 1490616823, now seen corresponding path program 1 times [2023-11-06 23:14:15,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:14:15,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937859078] [2023-11-06 23:14:15,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:14:15,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:14:15,578 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:14:15,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1568565627] [2023-11-06 23:14:15,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:14:15,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:14:15,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7823dc0c-8eee-4404-bfc6-1fbb1ef12f30/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:14:15,580 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7823dc0c-8eee-4404-bfc6-1fbb1ef12f30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:14:15,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7823dc0c-8eee-4404-bfc6-1fbb1ef12f30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-06 23:14:15,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:14:15,766 INFO L262 TraceCheckSpWp]: Trace formula consists of 602 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-06 23:14:15,773 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:14:25,505 INFO L134 CoverageAnalysis]: Checked inductivity of 3280 backedges. 82 proven. 234 refuted. 0 times theorem prover too weak. 2964 trivial. 0 not checked. [2023-11-06 23:14:25,505 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:14:31,116 INFO L134 CoverageAnalysis]: Checked inductivity of 3280 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3280 trivial. 0 not checked. [2023-11-06 23:14:31,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:14:31,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937859078] [2023-11-06 23:14:31,116 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:14:31,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568565627] [2023-11-06 23:14:31,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568565627] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 23:14:31,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 23:14:31,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [16] total 23 [2023-11-06 23:14:31,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280576198] [2023-11-06 23:14:31,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:14:31,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 23:14:31,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:14:31,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 23:14:31,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2023-11-06 23:14:31,119 INFO L87 Difference]: Start difference. First operand 379 states and 490 transitions. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 1 states have call successors, (41), 1 states have call predecessors, (41), 1 states have return successors, (41), 1 states have call predecessors, (41), 1 states have call successors, (41) [2023-11-06 23:14:32,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:14:32,735 INFO L93 Difference]: Finished difference Result 695 states and 880 transitions. [2023-11-06 23:14:32,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-06 23:14:32,736 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 1 states have call successors, (41), 1 states have call predecessors, (41), 1 states have return successors, (41), 1 states have call predecessors, (41), 1 states have call successors, (41) Word has length 254 [2023-11-06 23:14:32,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:14:32,739 INFO L225 Difference]: With dead ends: 695 [2023-11-06 23:14:32,740 INFO L226 Difference]: Without dead ends: 434 [2023-11-06 23:14:32,741 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 516 GetRequests, 485 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=254, Invalid=802, Unknown=0, NotChecked=0, Total=1056 [2023-11-06 23:14:32,742 INFO L413 NwaCegarLoop]: 167 mSDtfsCounter, 158 mSDsluCounter, 689 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 856 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-06 23:14:32,743 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 856 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-06 23:14:32,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2023-11-06 23:14:32,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 387. [2023-11-06 23:14:32,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 256 states have (on average 1.14453125) internal successors, (293), 258 states have internal predecessors, (293), 103 states have call successors, (103), 27 states have call predecessors, (103), 27 states have return successors, (103), 101 states have call predecessors, (103), 103 states have call successors, (103) [2023-11-06 23:14:32,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 499 transitions. [2023-11-06 23:14:32,904 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 499 transitions. Word has length 254 [2023-11-06 23:14:32,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:14:32,905 INFO L495 AbstractCegarLoop]: Abstraction has 387 states and 499 transitions. [2023-11-06 23:14:32,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 1 states have call successors, (41), 1 states have call predecessors, (41), 1 states have return successors, (41), 1 states have call predecessors, (41), 1 states have call successors, (41) [2023-11-06 23:14:32,905 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 499 transitions. [2023-11-06 23:14:32,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2023-11-06 23:14:32,907 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:14:32,907 INFO L195 NwaCegarLoop]: trace histogram [41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:14:32,919 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7823dc0c-8eee-4404-bfc6-1fbb1ef12f30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-06 23:14:33,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7823dc0c-8eee-4404-bfc6-1fbb1ef12f30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-06 23:14:33,114 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:14:33,115 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:14:33,115 INFO L85 PathProgramCache]: Analyzing trace with hash 903810809, now seen corresponding path program 1 times [2023-11-06 23:14:33,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:14:33,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499025432] [2023-11-06 23:14:33,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:14:33,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:14:33,170 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:14:33,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [813449600] [2023-11-06 23:14:33,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:14:33,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:14:33,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7823dc0c-8eee-4404-bfc6-1fbb1ef12f30/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:14:33,172 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7823dc0c-8eee-4404-bfc6-1fbb1ef12f30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:14:33,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7823dc0c-8eee-4404-bfc6-1fbb1ef12f30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-06 23:14:33,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:14:33,372 INFO L262 TraceCheckSpWp]: Trace formula consists of 599 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-06 23:14:33,380 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:14:43,434 INFO L134 CoverageAnalysis]: Checked inductivity of 3280 backedges. 88 proven. 342 refuted. 0 times theorem prover too weak. 2850 trivial. 0 not checked. [2023-11-06 23:14:43,434 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:14:49,002 INFO L134 CoverageAnalysis]: Checked inductivity of 3280 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3280 trivial. 0 not checked. [2023-11-06 23:14:49,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:14:49,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499025432] [2023-11-06 23:14:49,003 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:14:49,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813449600] [2023-11-06 23:14:49,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813449600] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 23:14:49,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 23:14:49,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [18] total 25 [2023-11-06 23:14:49,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559401527] [2023-11-06 23:14:49,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:14:49,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 23:14:49,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:14:49,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 23:14:49,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2023-11-06 23:14:49,005 INFO L87 Difference]: Start difference. First operand 387 states and 499 transitions. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 1 states have call successors, (41), 1 states have call predecessors, (41), 1 states have return successors, (41), 1 states have call predecessors, (41), 1 states have call successors, (41) [2023-11-06 23:14:50,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:14:50,494 INFO L93 Difference]: Finished difference Result 703 states and 888 transitions. [2023-11-06 23:14:50,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-06 23:14:50,494 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 1 states have call successors, (41), 1 states have call predecessors, (41), 1 states have return successors, (41), 1 states have call predecessors, (41), 1 states have call successors, (41) Word has length 254 [2023-11-06 23:14:50,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:14:50,498 INFO L225 Difference]: With dead ends: 703 [2023-11-06 23:14:50,498 INFO L226 Difference]: Without dead ends: 434 [2023-11-06 23:14:50,500 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 516 GetRequests, 483 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=266, Invalid=924, Unknown=0, NotChecked=0, Total=1190 [2023-11-06 23:14:50,500 INFO L413 NwaCegarLoop]: 179 mSDtfsCounter, 149 mSDsluCounter, 590 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 769 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-06 23:14:50,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 769 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-06 23:14:50,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2023-11-06 23:14:50,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 384. [2023-11-06 23:14:50,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 253 states have (on average 1.1422924901185771) internal successors, (289), 255 states have internal predecessors, (289), 103 states have call successors, (103), 27 states have call predecessors, (103), 27 states have return successors, (103), 101 states have call predecessors, (103), 103 states have call successors, (103) [2023-11-06 23:14:50,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 495 transitions. [2023-11-06 23:14:50,632 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 495 transitions. Word has length 254 [2023-11-06 23:14:50,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:14:50,632 INFO L495 AbstractCegarLoop]: Abstraction has 384 states and 495 transitions. [2023-11-06 23:14:50,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 1 states have call successors, (41), 1 states have call predecessors, (41), 1 states have return successors, (41), 1 states have call predecessors, (41), 1 states have call successors, (41) [2023-11-06 23:14:50,633 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 495 transitions. [2023-11-06 23:14:50,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2023-11-06 23:14:50,635 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:14:50,635 INFO L195 NwaCegarLoop]: trace histogram [41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:14:50,642 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7823dc0c-8eee-4404-bfc6-1fbb1ef12f30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-06 23:14:50,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7823dc0c-8eee-4404-bfc6-1fbb1ef12f30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:14:50,842 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:14:50,842 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:14:50,842 INFO L85 PathProgramCache]: Analyzing trace with hash 300839353, now seen corresponding path program 1 times [2023-11-06 23:14:50,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:14:50,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729878022] [2023-11-06 23:14:50,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:14:50,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:14:50,878 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:14:50,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1429645914] [2023-11-06 23:14:50,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:14:50,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:14:50,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7823dc0c-8eee-4404-bfc6-1fbb1ef12f30/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:14:50,880 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7823dc0c-8eee-4404-bfc6-1fbb1ef12f30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:14:50,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7823dc0c-8eee-4404-bfc6-1fbb1ef12f30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-06 23:14:51,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:14:51,299 INFO L262 TraceCheckSpWp]: Trace formula consists of 598 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-06 23:14:51,307 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:15:06,092 INFO L134 CoverageAnalysis]: Checked inductivity of 3280 backedges. 82 proven. 234 refuted. 0 times theorem prover too weak. 2964 trivial. 0 not checked. [2023-11-06 23:15:06,092 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:15:13,308 INFO L134 CoverageAnalysis]: Checked inductivity of 3280 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3280 trivial. 0 not checked. [2023-11-06 23:15:13,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:15:13,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729878022] [2023-11-06 23:15:13,308 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:15:13,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429645914] [2023-11-06 23:15:13,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429645914] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 23:15:13,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 23:15:13,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [17] total 25 [2023-11-06 23:15:13,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398810299] [2023-11-06 23:15:13,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:15:13,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 23:15:13,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:15:13,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 23:15:13,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=456, Unknown=0, NotChecked=0, Total=600 [2023-11-06 23:15:13,314 INFO L87 Difference]: Start difference. First operand 384 states and 495 transitions. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 1 states have call successors, (41), 1 states have call predecessors, (41), 1 states have return successors, (41), 1 states have call predecessors, (41), 1 states have call successors, (41) [2023-11-06 23:15:14,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:15:14,173 INFO L93 Difference]: Finished difference Result 707 states and 893 transitions. [2023-11-06 23:15:14,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-06 23:15:14,174 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 1 states have call successors, (41), 1 states have call predecessors, (41), 1 states have return successors, (41), 1 states have call predecessors, (41), 1 states have call successors, (41) Word has length 254 [2023-11-06 23:15:14,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:15:14,178 INFO L225 Difference]: With dead ends: 707 [2023-11-06 23:15:14,178 INFO L226 Difference]: Without dead ends: 441 [2023-11-06 23:15:14,179 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 510 GetRequests, 483 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=184, Invalid=628, Unknown=0, NotChecked=0, Total=812 [2023-11-06 23:15:14,180 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 137 mSDsluCounter, 515 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 655 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 23:15:14,180 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 655 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 23:15:14,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2023-11-06 23:15:14,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 386. [2023-11-06 23:15:14,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 255 states have (on average 1.1490196078431372) internal successors, (293), 257 states have internal predecessors, (293), 103 states have call successors, (103), 27 states have call predecessors, (103), 27 states have return successors, (103), 101 states have call predecessors, (103), 103 states have call successors, (103) [2023-11-06 23:15:14,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 499 transitions. [2023-11-06 23:15:14,286 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 499 transitions. Word has length 254 [2023-11-06 23:15:14,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:15:14,286 INFO L495 AbstractCegarLoop]: Abstraction has 386 states and 499 transitions. [2023-11-06 23:15:14,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 1 states have call successors, (41), 1 states have call predecessors, (41), 1 states have return successors, (41), 1 states have call predecessors, (41), 1 states have call successors, (41) [2023-11-06 23:15:14,287 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 499 transitions. [2023-11-06 23:15:14,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2023-11-06 23:15:14,288 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:15:14,288 INFO L195 NwaCegarLoop]: trace histogram [41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:15:14,295 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7823dc0c-8eee-4404-bfc6-1fbb1ef12f30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-06 23:15:14,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7823dc0c-8eee-4404-bfc6-1fbb1ef12f30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-06 23:15:14,489 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:15:14,489 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:15:14,489 INFO L85 PathProgramCache]: Analyzing trace with hash -1216002571, now seen corresponding path program 1 times [2023-11-06 23:15:14,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:15:14,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079442969] [2023-11-06 23:15:14,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:15:14,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:15:14,519 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:15:14,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [33388845] [2023-11-06 23:15:14,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:15:14,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:15:14,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7823dc0c-8eee-4404-bfc6-1fbb1ef12f30/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:15:14,520 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7823dc0c-8eee-4404-bfc6-1fbb1ef12f30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:15:14,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7823dc0c-8eee-4404-bfc6-1fbb1ef12f30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-06 23:15:14,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:15:14,737 INFO L262 TraceCheckSpWp]: Trace formula consists of 600 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-06 23:15:14,741 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:15:15,538 INFO L134 CoverageAnalysis]: Checked inductivity of 3280 backedges. 40 proven. 120 refuted. 0 times theorem prover too weak. 3120 trivial. 0 not checked. [2023-11-06 23:15:15,539 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:15:15,887 INFO L134 CoverageAnalysis]: Checked inductivity of 3280 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 3160 trivial. 0 not checked. [2023-11-06 23:15:15,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:15:15,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079442969] [2023-11-06 23:15:15,888 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:15:15,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33388845] [2023-11-06 23:15:15,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33388845] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:15:15,889 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:15:15,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2023-11-06 23:15:15,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140947360] [2023-11-06 23:15:15,889 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:15:15,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-06 23:15:15,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:15:15,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-06 23:15:15,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2023-11-06 23:15:15,892 INFO L87 Difference]: Start difference. First operand 386 states and 499 transitions. Second operand has 15 states, 15 states have (on average 6.266666666666667) internal successors, (94), 15 states have internal predecessors, (94), 4 states have call successors, (82), 3 states have call predecessors, (82), 4 states have return successors, (82), 2 states have call predecessors, (82), 4 states have call successors, (82) [2023-11-06 23:15:17,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:15:17,115 INFO L93 Difference]: Finished difference Result 771 states and 965 transitions. [2023-11-06 23:15:17,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-06 23:15:17,115 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 6.266666666666667) internal successors, (94), 15 states have internal predecessors, (94), 4 states have call successors, (82), 3 states have call predecessors, (82), 4 states have return successors, (82), 2 states have call predecessors, (82), 4 states have call successors, (82) Word has length 254 [2023-11-06 23:15:17,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:15:17,122 INFO L225 Difference]: With dead ends: 771 [2023-11-06 23:15:17,122 INFO L226 Difference]: Without dead ends: 503 [2023-11-06 23:15:17,126 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 522 GetRequests, 495 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=197, Invalid=559, Unknown=0, NotChecked=0, Total=756 [2023-11-06 23:15:17,127 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 518 mSDsluCounter, 475 mSDsCounter, 0 mSdLazyCounter, 844 mSolverCounterSat, 222 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 559 SdHoareTripleChecker+Valid, 594 SdHoareTripleChecker+Invalid, 1066 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 222 IncrementalHoareTripleChecker+Valid, 844 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-06 23:15:17,127 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [559 Valid, 594 Invalid, 1066 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [222 Valid, 844 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-06 23:15:17,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2023-11-06 23:15:17,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 387. [2023-11-06 23:15:17,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 256 states have (on average 1.15234375) internal successors, (295), 258 states have internal predecessors, (295), 103 states have call successors, (103), 27 states have call predecessors, (103), 27 states have return successors, (103), 101 states have call predecessors, (103), 103 states have call successors, (103) [2023-11-06 23:15:17,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 501 transitions. [2023-11-06 23:15:17,274 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 501 transitions. Word has length 254 [2023-11-06 23:15:17,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:15:17,275 INFO L495 AbstractCegarLoop]: Abstraction has 387 states and 501 transitions. [2023-11-06 23:15:17,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.266666666666667) internal successors, (94), 15 states have internal predecessors, (94), 4 states have call successors, (82), 3 states have call predecessors, (82), 4 states have return successors, (82), 2 states have call predecessors, (82), 4 states have call successors, (82) [2023-11-06 23:15:17,275 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 501 transitions. [2023-11-06 23:15:17,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2023-11-06 23:15:17,277 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:15:17,277 INFO L195 NwaCegarLoop]: trace histogram [41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:15:17,291 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7823dc0c-8eee-4404-bfc6-1fbb1ef12f30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-06 23:15:17,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7823dc0c-8eee-4404-bfc6-1fbb1ef12f30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-06 23:15:17,484 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:15:17,485 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:15:17,485 INFO L85 PathProgramCache]: Analyzing trace with hash -285966661, now seen corresponding path program 1 times [2023-11-06 23:15:17,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:15:17,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242244535] [2023-11-06 23:15:17,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:15:17,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:15:17,516 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:15:17,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [198851865] [2023-11-06 23:15:17,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:15:17,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:15:17,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7823dc0c-8eee-4404-bfc6-1fbb1ef12f30/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:15:17,518 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7823dc0c-8eee-4404-bfc6-1fbb1ef12f30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:15:17,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7823dc0c-8eee-4404-bfc6-1fbb1ef12f30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-06 23:15:17,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:15:17,814 INFO L262 TraceCheckSpWp]: Trace formula consists of 595 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-06 23:15:17,822 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:15:31,756 INFO L134 CoverageAnalysis]: Checked inductivity of 3280 backedges. 82 proven. 234 refuted. 0 times theorem prover too weak. 2964 trivial. 0 not checked. [2023-11-06 23:15:31,757 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:15:38,503 INFO L134 CoverageAnalysis]: Checked inductivity of 3280 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3280 trivial. 0 not checked. [2023-11-06 23:15:38,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:15:38,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242244535] [2023-11-06 23:15:38,503 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:15:38,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198851865] [2023-11-06 23:15:38,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198851865] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 23:15:38,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 23:15:38,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [17] total 25 [2023-11-06 23:15:38,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324423669] [2023-11-06 23:15:38,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:15:38,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 23:15:38,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:15:38,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 23:15:38,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=456, Unknown=0, NotChecked=0, Total=600 [2023-11-06 23:15:38,508 INFO L87 Difference]: Start difference. First operand 387 states and 501 transitions. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 1 states have call successors, (41), 1 states have call predecessors, (41), 1 states have return successors, (41), 1 states have call predecessors, (41), 1 states have call successors, (41) [2023-11-06 23:15:39,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:15:39,414 INFO L93 Difference]: Finished difference Result 704 states and 892 transitions. [2023-11-06 23:15:39,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-06 23:15:39,415 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 1 states have call successors, (41), 1 states have call predecessors, (41), 1 states have return successors, (41), 1 states have call predecessors, (41), 1 states have call successors, (41) Word has length 254 [2023-11-06 23:15:39,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:15:39,418 INFO L225 Difference]: With dead ends: 704 [2023-11-06 23:15:39,418 INFO L226 Difference]: Without dead ends: 436 [2023-11-06 23:15:39,419 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 510 GetRequests, 483 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=184, Invalid=628, Unknown=0, NotChecked=0, Total=812 [2023-11-06 23:15:39,420 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 188 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 546 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-06 23:15:39,420 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 546 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-06 23:15:39,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2023-11-06 23:15:39,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 383. [2023-11-06 23:15:39,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 252 states have (on average 1.1507936507936507) internal successors, (290), 254 states have internal predecessors, (290), 103 states have call successors, (103), 27 states have call predecessors, (103), 27 states have return successors, (103), 101 states have call predecessors, (103), 103 states have call successors, (103) [2023-11-06 23:15:39,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 496 transitions. [2023-11-06 23:15:39,560 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 496 transitions. Word has length 254 [2023-11-06 23:15:39,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:15:39,561 INFO L495 AbstractCegarLoop]: Abstraction has 383 states and 496 transitions. [2023-11-06 23:15:39,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 1 states have call successors, (41), 1 states have call predecessors, (41), 1 states have return successors, (41), 1 states have call predecessors, (41), 1 states have call successors, (41) [2023-11-06 23:15:39,561 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 496 transitions. [2023-11-06 23:15:39,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2023-11-06 23:15:39,563 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:15:39,564 INFO L195 NwaCegarLoop]: trace histogram [41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:15:39,570 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7823dc0c-8eee-4404-bfc6-1fbb1ef12f30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-06 23:15:39,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7823dc0c-8eee-4404-bfc6-1fbb1ef12f30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-06 23:15:39,770 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:15:39,771 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:15:39,771 INFO L85 PathProgramCache]: Analyzing trace with hash 977047576, now seen corresponding path program 1 times [2023-11-06 23:15:39,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:15:39,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167002547] [2023-11-06 23:15:39,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:15:39,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:15:39,797 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:15:39,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1402936542] [2023-11-06 23:15:39,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:15:39,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:15:39,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7823dc0c-8eee-4404-bfc6-1fbb1ef12f30/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:15:39,799 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7823dc0c-8eee-4404-bfc6-1fbb1ef12f30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:15:39,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7823dc0c-8eee-4404-bfc6-1fbb1ef12f30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-06 23:15:39,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:15:40,000 INFO L262 TraceCheckSpWp]: Trace formula consists of 602 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-06 23:15:40,007 INFO L285 TraceCheckSpWp]: Computing forward predicates...