./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-100_file-59.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_6774b8e9-e26f-411b-997f-1d9b716cedef/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6774b8e9-e26f-411b-997f-1d9b716cedef/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_6774b8e9-e26f-411b-997f-1d9b716cedef/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6774b8e9-e26f-411b-997f-1d9b716cedef/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-100_file-59.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6774b8e9-e26f-411b-997f-1d9b716cedef/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_6774b8e9-e26f-411b-997f-1d9b716cedef/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 3e25c1e865f9c17a1fadd9c040f12ed15699bfd313ad109ce8205c26bee89007 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:21:32,185 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:21:32,298 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6774b8e9-e26f-411b-997f-1d9b716cedef/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 22:21:32,311 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:21:32,312 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:21:32,354 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:21:32,356 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:21:32,356 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:21:32,358 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:21:32,363 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:21:32,364 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:21:32,364 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:21:32,365 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:21:32,367 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:21:32,367 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 22:21:32,368 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:21:32,368 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:21:32,369 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:21:32,369 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:21:32,370 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 22:21:32,370 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:21:32,371 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 22:21:32,372 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:21:32,372 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 22:21:32,373 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:21:32,374 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:21:32,374 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:21:32,375 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:21:32,375 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:21:32,376 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:21:32,377 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:21:32,378 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 22:21:32,378 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:21:32,378 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:21:32,379 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:21:32,379 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 22:21:32,379 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:21:32,380 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:21:32,380 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:21:32,381 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_6774b8e9-e26f-411b-997f-1d9b716cedef/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6774b8e9-e26f-411b-997f-1d9b716cedef/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3e25c1e865f9c17a1fadd9c040f12ed15699bfd313ad109ce8205c26bee89007 [2023-11-06 22:21:32,682 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:21:32,720 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:21:32,723 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:21:32,725 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:21:32,725 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:21:32,726 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6774b8e9-e26f-411b-997f-1d9b716cedef/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-100_file-59.i [2023-11-06 22:21:35,938 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:21:36,173 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:21:36,174 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6774b8e9-e26f-411b-997f-1d9b716cedef/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-100_file-59.i [2023-11-06 22:21:36,186 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6774b8e9-e26f-411b-997f-1d9b716cedef/bin/uautomizer-verify-WvqO1wxjHP/data/c87bb9b09/e027274d89cd4f6383902f1eae943ffb/FLAG2fa735e0e [2023-11-06 22:21:36,204 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6774b8e9-e26f-411b-997f-1d9b716cedef/bin/uautomizer-verify-WvqO1wxjHP/data/c87bb9b09/e027274d89cd4f6383902f1eae943ffb [2023-11-06 22:21:36,211 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:21:36,217 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:21:36,222 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:21:36,222 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:21:36,228 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:21:36,229 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:21:36" (1/1) ... [2023-11-06 22:21:36,230 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14a73c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:21:36, skipping insertion in model container [2023-11-06 22:21:36,231 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:21:36" (1/1) ... [2023-11-06 22:21:36,282 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:21:36,456 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_6774b8e9-e26f-411b-997f-1d9b716cedef/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-100_file-59.i[916,929] [2023-11-06 22:21:36,575 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:21:36,599 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:21:36,614 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_6774b8e9-e26f-411b-997f-1d9b716cedef/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-100_file-59.i[916,929] [2023-11-06 22:21:36,698 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:21:36,731 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:21:36,732 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:21:36 WrapperNode [2023-11-06 22:21:36,733 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:21:36,735 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:21:36,735 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:21:36,736 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:21:36,750 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:21:36" (1/1) ... [2023-11-06 22:21:36,772 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:21:36" (1/1) ... [2023-11-06 22:21:36,858 INFO L138 Inliner]: procedures = 26, calls = 62, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 350 [2023-11-06 22:21:36,858 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:21:36,859 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:21:36,859 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:21:36,859 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:21:36,873 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:21:36" (1/1) ... [2023-11-06 22:21:36,874 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:21:36" (1/1) ... [2023-11-06 22:21:36,890 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:21:36" (1/1) ... [2023-11-06 22:21:36,890 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:21:36" (1/1) ... [2023-11-06 22:21:36,915 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:21:36" (1/1) ... [2023-11-06 22:21:36,920 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:21:36" (1/1) ... [2023-11-06 22:21:36,929 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:21:36" (1/1) ... [2023-11-06 22:21:36,942 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:21:36" (1/1) ... [2023-11-06 22:21:36,955 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:21:36,961 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:21:36,962 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:21:36,962 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:21:36,963 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:21:36" (1/1) ... [2023-11-06 22:21:36,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:21:36,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6774b8e9-e26f-411b-997f-1d9b716cedef/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:21:37,002 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6774b8e9-e26f-411b-997f-1d9b716cedef/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:21:37,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6774b8e9-e26f-411b-997f-1d9b716cedef/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:21:37,054 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:21:37,054 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-06 22:21:37,055 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-06 22:21:37,056 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:21:37,056 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:21:37,056 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:21:37,253 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:21:37,255 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:21:38,175 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:21:38,188 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:21:38,188 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-06 22:21:38,192 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:21:38 BoogieIcfgContainer [2023-11-06 22:21:38,192 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:21:38,199 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:21:38,199 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:21:38,204 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:21:38,204 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:21:36" (1/3) ... [2023-11-06 22:21:38,205 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37d1b6cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:21:38, skipping insertion in model container [2023-11-06 22:21:38,205 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:21:36" (2/3) ... [2023-11-06 22:21:38,208 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37d1b6cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:21:38, skipping insertion in model container [2023-11-06 22:21:38,208 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:21:38" (3/3) ... [2023-11-06 22:21:38,209 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_fillercode_fillercodesize_ps-cn-100_file-59.i [2023-11-06 22:21:38,234 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:21:38,235 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 22:21:38,323 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:21:38,331 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;@76cd5a3b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:21:38,331 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-06 22:21:38,336 INFO L276 IsEmpty]: Start isEmpty. Operand has 142 states, 90 states have (on average 1.511111111111111) internal successors, (136), 91 states have internal predecessors, (136), 49 states have call successors, (49), 1 states have call predecessors, (49), 1 states have return successors, (49), 49 states have call predecessors, (49), 49 states have call successors, (49) [2023-11-06 22:21:38,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2023-11-06 22:21:38,360 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:21:38,361 INFO L195 NwaCegarLoop]: trace histogram [49, 49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:21:38,362 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:21:38,367 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:21:38,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1655074974, now seen corresponding path program 1 times [2023-11-06 22:21:38,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:21:38,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473977852] [2023-11-06 22:21:38,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:21:38,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:21:38,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:21:38,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:21:38,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473977852] [2023-11-06 22:21:38,673 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-06 22:21:38,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124336070] [2023-11-06 22:21:38,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:21:38,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:21:38,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6774b8e9-e26f-411b-997f-1d9b716cedef/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:21:38,678 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6774b8e9-e26f-411b-997f-1d9b716cedef/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:21:38,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6774b8e9-e26f-411b-997f-1d9b716cedef/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:21:39,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:21:39,083 INFO L262 TraceCheckSpWp]: Trace formula consists of 716 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-06 22:21:39,099 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:21:39,168 INFO L134 CoverageAnalysis]: Checked inductivity of 4704 backedges. 96 proven. 0 refuted. 0 times theorem prover too weak. 4608 trivial. 0 not checked. [2023-11-06 22:21:39,168 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:21:39,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124336070] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:21:39,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:21:39,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:21:39,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581591070] [2023-11-06 22:21:39,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:21:39,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-06 22:21:39,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:21:39,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-06 22:21:39,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 22:21:39,214 INFO L87 Difference]: Start difference. First operand has 142 states, 90 states have (on average 1.511111111111111) internal successors, (136), 91 states have internal predecessors, (136), 49 states have call successors, (49), 1 states have call predecessors, (49), 1 states have return successors, (49), 49 states have call predecessors, (49), 49 states have call successors, (49) Second operand has 2 states, 2 states have (on average 32.0) internal successors, (64), 2 states have internal predecessors, (64), 2 states have call successors, (49), 2 states have call predecessors, (49), 1 states have return successors, (49), 1 states have call predecessors, (49), 2 states have call successors, (49) [2023-11-06 22:21:39,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:21:39,264 INFO L93 Difference]: Finished difference Result 270 states and 498 transitions. [2023-11-06 22:21:39,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-06 22:21:39,267 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 32.0) internal successors, (64), 2 states have internal predecessors, (64), 2 states have call successors, (49), 2 states have call predecessors, (49), 1 states have return successors, (49), 1 states have call predecessors, (49), 2 states have call successors, (49) Word has length 304 [2023-11-06 22:21:39,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:21:39,277 INFO L225 Difference]: With dead ends: 270 [2023-11-06 22:21:39,277 INFO L226 Difference]: Without dead ends: 131 [2023-11-06 22:21:39,283 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 303 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 22:21:39,287 INFO L413 NwaCegarLoop]: 213 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:21:39,288 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:21:39,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2023-11-06 22:21:39,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2023-11-06 22:21:39,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 80 states have (on average 1.4375) internal successors, (115), 80 states have internal predecessors, (115), 49 states have call successors, (49), 1 states have call predecessors, (49), 1 states have return successors, (49), 49 states have call predecessors, (49), 49 states have call successors, (49) [2023-11-06 22:21:39,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 213 transitions. [2023-11-06 22:21:39,377 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 213 transitions. Word has length 304 [2023-11-06 22:21:39,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:21:39,378 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 213 transitions. [2023-11-06 22:21:39,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 32.0) internal successors, (64), 2 states have internal predecessors, (64), 2 states have call successors, (49), 2 states have call predecessors, (49), 1 states have return successors, (49), 1 states have call predecessors, (49), 2 states have call successors, (49) [2023-11-06 22:21:39,379 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 213 transitions. [2023-11-06 22:21:39,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2023-11-06 22:21:39,393 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:21:39,394 INFO L195 NwaCegarLoop]: trace histogram [49, 49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:21:39,415 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6774b8e9-e26f-411b-997f-1d9b716cedef/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 22:21:39,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6774b8e9-e26f-411b-997f-1d9b716cedef/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-06 22:21:39,606 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:21:39,607 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:21:39,607 INFO L85 PathProgramCache]: Analyzing trace with hash -28796512, now seen corresponding path program 1 times [2023-11-06 22:21:39,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:21:39,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977429341] [2023-11-06 22:21:39,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:21:39,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:21:39,767 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:21:39,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [876793381] [2023-11-06 22:21:39,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:21:39,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:21:39,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6774b8e9-e26f-411b-997f-1d9b716cedef/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:21:39,772 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6774b8e9-e26f-411b-997f-1d9b716cedef/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:21:39,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6774b8e9-e26f-411b-997f-1d9b716cedef/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 22:21:40,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:21:40,084 INFO L262 TraceCheckSpWp]: Trace formula consists of 716 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 22:21:40,107 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:21:40,750 INFO L134 CoverageAnalysis]: Checked inductivity of 4704 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4704 trivial. 0 not checked. [2023-11-06 22:21:40,750 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:21:40,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:21:40,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977429341] [2023-11-06 22:21:40,751 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:21:40,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876793381] [2023-11-06 22:21:40,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876793381] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:21:40,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:21:40,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:21:40,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646266725] [2023-11-06 22:21:40,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:21:40,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:21:40,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:21:40,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:21:40,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:21:40,757 INFO L87 Difference]: Start difference. First operand 131 states and 213 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 3 states have internal predecessors, (62), 1 states have call successors, (49), 1 states have call predecessors, (49), 1 states have return successors, (49), 1 states have call predecessors, (49), 1 states have call successors, (49) [2023-11-06 22:21:41,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:21:41,097 INFO L93 Difference]: Finished difference Result 388 states and 634 transitions. [2023-11-06 22:21:41,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:21:41,099 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 3 states have internal predecessors, (62), 1 states have call successors, (49), 1 states have call predecessors, (49), 1 states have return successors, (49), 1 states have call predecessors, (49), 1 states have call successors, (49) Word has length 304 [2023-11-06 22:21:41,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:21:41,114 INFO L225 Difference]: With dead ends: 388 [2023-11-06 22:21:41,114 INFO L226 Difference]: Without dead ends: 260 [2023-11-06 22:21:41,119 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 301 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:21:41,120 INFO L413 NwaCegarLoop]: 210 mSDtfsCounter, 154 mSDsluCounter, 413 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 623 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:21:41,123 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 623 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 22:21:41,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2023-11-06 22:21:41,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 241. [2023-11-06 22:21:41,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 140 states have (on average 1.4214285714285715) internal successors, (199), 140 states have internal predecessors, (199), 98 states have call successors, (98), 2 states have call predecessors, (98), 2 states have return successors, (98), 98 states have call predecessors, (98), 98 states have call successors, (98) [2023-11-06 22:21:41,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 395 transitions. [2023-11-06 22:21:41,241 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 395 transitions. Word has length 304 [2023-11-06 22:21:41,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:21:41,246 INFO L495 AbstractCegarLoop]: Abstraction has 241 states and 395 transitions. [2023-11-06 22:21:41,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 3 states have internal predecessors, (62), 1 states have call successors, (49), 1 states have call predecessors, (49), 1 states have return successors, (49), 1 states have call predecessors, (49), 1 states have call successors, (49) [2023-11-06 22:21:41,247 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 395 transitions. [2023-11-06 22:21:41,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2023-11-06 22:21:41,262 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:21:41,263 INFO L195 NwaCegarLoop]: trace histogram [49, 49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:21:41,273 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6774b8e9-e26f-411b-997f-1d9b716cedef/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 22:21:41,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6774b8e9-e26f-411b-997f-1d9b716cedef/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:21:41,472 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:21:41,473 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:21:41,473 INFO L85 PathProgramCache]: Analyzing trace with hash 706924136, now seen corresponding path program 1 times [2023-11-06 22:21:41,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:21:41,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485909710] [2023-11-06 22:21:41,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:21:41,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:21:41,575 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:21:41,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2058652372] [2023-11-06 22:21:41,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:21:41,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:21:41,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6774b8e9-e26f-411b-997f-1d9b716cedef/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:21:41,589 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6774b8e9-e26f-411b-997f-1d9b716cedef/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:21:41,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6774b8e9-e26f-411b-997f-1d9b716cedef/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 22:21:41,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:21:41,906 INFO L262 TraceCheckSpWp]: Trace formula consists of 716 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 22:21:41,918 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:21:42,427 INFO L134 CoverageAnalysis]: Checked inductivity of 4704 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4704 trivial. 0 not checked. [2023-11-06 22:21:42,434 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:21:42,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:21:42,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485909710] [2023-11-06 22:21:42,435 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:21:42,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058652372] [2023-11-06 22:21:42,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058652372] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:21:42,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:21:42,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 22:21:42,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121116629] [2023-11-06 22:21:42,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:21:42,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:21:42,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:21:42,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:21:42,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:21:42,441 INFO L87 Difference]: Start difference. First operand 241 states and 395 transitions. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 5 states have internal predecessors, (63), 1 states have call successors, (49), 1 states have call predecessors, (49), 1 states have return successors, (49), 1 states have call predecessors, (49), 1 states have call successors, (49) [2023-11-06 22:21:42,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:21:42,978 INFO L93 Difference]: Finished difference Result 507 states and 827 transitions. [2023-11-06 22:21:42,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:21:42,979 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 5 states have internal predecessors, (63), 1 states have call successors, (49), 1 states have call predecessors, (49), 1 states have return successors, (49), 1 states have call predecessors, (49), 1 states have call successors, (49) Word has length 305 [2023-11-06 22:21:42,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:21:42,987 INFO L225 Difference]: With dead ends: 507 [2023-11-06 22:21:42,987 INFO L226 Difference]: Without dead ends: 379 [2023-11-06 22:21:42,988 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 300 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2023-11-06 22:21:42,992 INFO L413 NwaCegarLoop]: 211 mSDtfsCounter, 227 mSDsluCounter, 716 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 927 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 22:21:42,996 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [227 Valid, 927 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 22:21:42,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2023-11-06 22:21:43,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 367. [2023-11-06 22:21:43,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 216 states have (on average 1.4259259259259258) internal successors, (308), 216 states have internal predecessors, (308), 147 states have call successors, (147), 3 states have call predecessors, (147), 3 states have return successors, (147), 147 states have call predecessors, (147), 147 states have call successors, (147) [2023-11-06 22:21:43,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 602 transitions. [2023-11-06 22:21:43,101 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 602 transitions. Word has length 305 [2023-11-06 22:21:43,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:21:43,103 INFO L495 AbstractCegarLoop]: Abstraction has 367 states and 602 transitions. [2023-11-06 22:21:43,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 5 states have internal predecessors, (63), 1 states have call successors, (49), 1 states have call predecessors, (49), 1 states have return successors, (49), 1 states have call predecessors, (49), 1 states have call successors, (49) [2023-11-06 22:21:43,103 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 602 transitions. [2023-11-06 22:21:43,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2023-11-06 22:21:43,106 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:21:43,106 INFO L195 NwaCegarLoop]: trace histogram [49, 49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:21:43,119 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6774b8e9-e26f-411b-997f-1d9b716cedef/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 22:21:43,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6774b8e9-e26f-411b-997f-1d9b716cedef/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:21:43,314 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:21:43,315 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:21:43,315 INFO L85 PathProgramCache]: Analyzing trace with hash 58587797, now seen corresponding path program 1 times [2023-11-06 22:21:43,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:21:43,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240746156] [2023-11-06 22:21:43,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:21:43,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:21:43,373 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:21:43,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [808416227] [2023-11-06 22:21:43,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:21:43,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:21:43,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6774b8e9-e26f-411b-997f-1d9b716cedef/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:21:43,376 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6774b8e9-e26f-411b-997f-1d9b716cedef/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:21:43,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6774b8e9-e26f-411b-997f-1d9b716cedef/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 22:21:43,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:21:43,849 INFO L262 TraceCheckSpWp]: Trace formula consists of 718 conjuncts, 40 conjunts are in the unsatisfiable core [2023-11-06 22:21:43,860 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:21:48,315 INFO L134 CoverageAnalysis]: Checked inductivity of 4704 backedges. 624 proven. 630 refuted. 0 times theorem prover too weak. 3450 trivial. 0 not checked. [2023-11-06 22:21:48,315 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:22:32,821 WARN L293 SmtUtils]: Spent 13.32s on a formula simplification that was a NOOP. DAG size: 49 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-06 22:22:49,494 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse7 (mod c_~var_1_4~0 256))) (let ((.cse4 (mod c_~var_1_19~0 4294967296)) (.cse2 (div (mod c_~var_1_6~0 65536) .cse7))) (let ((.cse0 (mod (+ .cse7 c_~var_1_7~0) 65536)) (.cse3 (mod (* c_~var_1_19~0 .cse2) 4294967296)) (.cse5 (mod |c_ULTIMATE.start_step_~stepLocal_2~0#1| 65536)) (.cse6 (+ (mod c_~var_1_7~0 65536) .cse7 1)) (.cse1 (+ .cse4 1))) (and (or (< .cse0 .cse1) (not (= (mod (* .cse2 .cse0) 4294967296) .cse0))) (or (not (= .cse3 .cse0)) (< .cse4 .cse0)) (or (< .cse5 .cse3) (< .cse3 .cse6) (< .cse4 .cse3)) (forall ((v_z_6 Int)) (or (not (= (mod (* v_z_6 .cse2) 4294967296) v_z_6)) (< .cse5 v_z_6) (< v_z_6 .cse6) (< v_z_6 .cse1))))))) is different from false [2023-11-06 22:23:08,149 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse7 (mod c_~var_1_4~0 256))) (let ((.cse2 (div (mod c_~var_1_6~0 65536) .cse7)) (.cse4 (mod c_~var_1_19~0 4294967296))) (let ((.cse0 (mod (+ .cse7 c_~var_1_7~0) 65536)) (.cse1 (+ .cse4 1)) (.cse6 (mod c_~var_1_17~0 65536)) (.cse5 (+ (mod c_~var_1_7~0 65536) .cse7 1)) (.cse3 (mod (* c_~var_1_19~0 .cse2) 4294967296))) (and (or (< .cse0 .cse1) (not (= (mod (* .cse2 .cse0) 4294967296) .cse0))) (or (not (= .cse3 .cse0)) (< .cse4 .cse0)) (forall ((v_z_6 Int)) (or (not (= (mod (* v_z_6 .cse2) 4294967296) v_z_6)) (< v_z_6 .cse5) (< v_z_6 .cse1) (< .cse6 v_z_6))) (or (< .cse6 .cse3) (< .cse3 .cse5) (< .cse4 .cse3)))))) is different from false [2023-11-06 22:24:00,756 WARN L861 $PredicateComparison]: unable to prove that (or (= c_assume_abort_if_not_~cond 0) (< (mod c_~var_1_7~0 65536) 32768) (not (= |c_assume_abort_if_not_#in~cond| 0)) (let ((.cse1 (mod c_~var_1_4~0 256))) (let ((.cse2 (div (mod c_~var_1_6~0 65536) .cse1)) (.cse0 (mod (+ .cse1 c_~var_1_7~0) 65536))) (and (or (< .cse0 (+ .cse1 1)) (not (= (mod (* .cse2 .cse0) 4294967296) .cse0))) (or (< .cse1 .cse0) (not (= (mod (* .cse2 .cse1) 4294967296) .cse0))))))) is different from true [2023-11-06 22:24:10,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:24:10,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240746156] [2023-11-06 22:24:10,846 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:24:10,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808416227] [2023-11-06 22:24:10,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808416227] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:24:10,846 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:24:10,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2023-11-06 22:24:10,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922653043] [2023-11-06 22:24:10,847 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-06 22:24:10,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-06 22:24:10,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:24:10,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-06 22:24:10,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=602, Unknown=13, NotChecked=168, Total=992 [2023-11-06 22:24:10,854 INFO L87 Difference]: Start difference. First operand 367 states and 602 transitions. Second operand has 22 states, 22 states have (on average 3.727272727272727) internal successors, (82), 20 states have internal predecessors, (82), 6 states have call successors, (49), 6 states have call predecessors, (49), 7 states have return successors, (49), 6 states have call predecessors, (49), 6 states have call successors, (49) [2023-11-06 22:24:23,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:24:23,888 INFO L93 Difference]: Finished difference Result 588 states and 894 transitions. [2023-11-06 22:24:23,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-06 22:24:23,889 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.727272727272727) internal successors, (82), 20 states have internal predecessors, (82), 6 states have call successors, (49), 6 states have call predecessors, (49), 7 states have return successors, (49), 6 states have call predecessors, (49), 6 states have call successors, (49) Word has length 306 [2023-11-06 22:24:23,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:24:23,894 INFO L225 Difference]: With dead ends: 588 [2023-11-06 22:24:23,894 INFO L226 Difference]: Without dead ends: 460 [2023-11-06 22:24:23,896 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 590 GetRequests, 545 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 76.3s TimeCoverageRelationStatistics Valid=474, Invalid=1414, Unknown=16, NotChecked=258, Total=2162 [2023-11-06 22:24:23,897 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 210 mSDsluCounter, 1022 mSDsCounter, 0 mSdLazyCounter, 1288 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 1184 SdHoareTripleChecker+Invalid, 1310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-11-06 22:24:23,898 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 1184 Invalid, 1310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1288 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-11-06 22:24:23,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2023-11-06 22:24:23,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 429. [2023-11-06 22:24:23,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 263 states have (on average 1.349809885931559) internal successors, (355), 263 states have internal predecessors, (355), 147 states have call successors, (147), 18 states have call predecessors, (147), 18 states have return successors, (147), 147 states have call predecessors, (147), 147 states have call successors, (147) [2023-11-06 22:24:23,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 649 transitions. [2023-11-06 22:24:23,991 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 649 transitions. Word has length 306 [2023-11-06 22:24:23,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:24:23,993 INFO L495 AbstractCegarLoop]: Abstraction has 429 states and 649 transitions. [2023-11-06 22:24:23,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.727272727272727) internal successors, (82), 20 states have internal predecessors, (82), 6 states have call successors, (49), 6 states have call predecessors, (49), 7 states have return successors, (49), 6 states have call predecessors, (49), 6 states have call successors, (49) [2023-11-06 22:24:23,993 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 649 transitions. [2023-11-06 22:24:23,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2023-11-06 22:24:23,996 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:24:23,997 INFO L195 NwaCegarLoop]: trace histogram [49, 49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:24:24,009 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6774b8e9-e26f-411b-997f-1d9b716cedef/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 22:24:24,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6774b8e9-e26f-411b-997f-1d9b716cedef/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:24:24,205 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:24:24,206 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:24:24,206 INFO L85 PathProgramCache]: Analyzing trace with hash 1833595159, now seen corresponding path program 1 times [2023-11-06 22:24:24,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:24:24,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703996997] [2023-11-06 22:24:24,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:24:24,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:24:24,262 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:24:24,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [644466414] [2023-11-06 22:24:24,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:24:24,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:24:24,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6774b8e9-e26f-411b-997f-1d9b716cedef/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:24:24,264 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6774b8e9-e26f-411b-997f-1d9b716cedef/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:24:24,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6774b8e9-e26f-411b-997f-1d9b716cedef/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 22:24:24,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:24:24,511 INFO L262 TraceCheckSpWp]: Trace formula consists of 715 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-06 22:24:24,520 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:24:25,763 INFO L134 CoverageAnalysis]: Checked inductivity of 4704 backedges. 1800 proven. 108 refuted. 0 times theorem prover too weak. 2796 trivial. 0 not checked. [2023-11-06 22:24:25,763 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:24:26,481 INFO L134 CoverageAnalysis]: Checked inductivity of 4704 backedges. 36 proven. 108 refuted. 0 times theorem prover too weak. 4560 trivial. 0 not checked. [2023-11-06 22:24:26,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:24:26,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703996997] [2023-11-06 22:24:26,483 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:24:26,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644466414] [2023-11-06 22:24:26,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644466414] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:24:26,484 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:24:26,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2023-11-06 22:24:26,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678498888] [2023-11-06 22:24:26,486 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:24:26,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-06 22:24:26,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:24:26,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-06 22:24:26,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2023-11-06 22:24:26,491 INFO L87 Difference]: Start difference. First operand 429 states and 649 transitions. Second operand has 15 states, 15 states have (on average 8.666666666666666) internal successors, (130), 15 states have internal predecessors, (130), 4 states have call successors, (98), 3 states have call predecessors, (98), 5 states have return successors, (98), 4 states have call predecessors, (98), 4 states have call successors, (98) [2023-11-06 22:24:29,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:24:29,094 INFO L93 Difference]: Finished difference Result 1333 states and 1918 transitions. [2023-11-06 22:24:29,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-06 22:24:29,096 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 8.666666666666666) internal successors, (130), 15 states have internal predecessors, (130), 4 states have call successors, (98), 3 states have call predecessors, (98), 5 states have return successors, (98), 4 states have call predecessors, (98), 4 states have call successors, (98) Word has length 306 [2023-11-06 22:24:29,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:24:29,107 INFO L225 Difference]: With dead ends: 1333 [2023-11-06 22:24:29,107 INFO L226 Difference]: Without dead ends: 1037 [2023-11-06 22:24:29,109 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 637 GetRequests, 601 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=317, Invalid=1015, Unknown=0, NotChecked=0, Total=1332 [2023-11-06 22:24:29,110 INFO L413 NwaCegarLoop]: 339 mSDtfsCounter, 830 mSDsluCounter, 1756 mSDsCounter, 0 mSdLazyCounter, 1699 mSolverCounterSat, 414 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 844 SdHoareTripleChecker+Valid, 2095 SdHoareTripleChecker+Invalid, 2113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 414 IncrementalHoareTripleChecker+Valid, 1699 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:24:29,111 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [844 Valid, 2095 Invalid, 2113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [414 Valid, 1699 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-11-06 22:24:29,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1037 states. [2023-11-06 22:24:29,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1037 to 639. [2023-11-06 22:24:29,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 639 states, 414 states have (on average 1.2753623188405796) internal successors, (528), 417 states have internal predecessors, (528), 184 states have call successors, (184), 40 states have call predecessors, (184), 40 states have return successors, (184), 181 states have call predecessors, (184), 184 states have call successors, (184) [2023-11-06 22:24:29,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 896 transitions. [2023-11-06 22:24:29,241 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 896 transitions. Word has length 306 [2023-11-06 22:24:29,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:24:29,242 INFO L495 AbstractCegarLoop]: Abstraction has 639 states and 896 transitions. [2023-11-06 22:24:29,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 8.666666666666666) internal successors, (130), 15 states have internal predecessors, (130), 4 states have call successors, (98), 3 states have call predecessors, (98), 5 states have return successors, (98), 4 states have call predecessors, (98), 4 states have call successors, (98) [2023-11-06 22:24:29,243 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 896 transitions. [2023-11-06 22:24:29,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2023-11-06 22:24:29,247 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:24:29,248 INFO L195 NwaCegarLoop]: trace histogram [49, 49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:24:29,260 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6774b8e9-e26f-411b-997f-1d9b716cedef/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 22:24:29,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6774b8e9-e26f-411b-997f-1d9b716cedef/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:24:29,455 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:24:29,456 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:24:29,456 INFO L85 PathProgramCache]: Analyzing trace with hash 2091760597, now seen corresponding path program 1 times [2023-11-06 22:24:29,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:24:29,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593936319] [2023-11-06 22:24:29,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:24:29,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:24:29,509 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:24:29,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [406425526] [2023-11-06 22:24:29,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:24:29,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:24:29,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6774b8e9-e26f-411b-997f-1d9b716cedef/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:24:29,511 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6774b8e9-e26f-411b-997f-1d9b716cedef/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:24:29,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6774b8e9-e26f-411b-997f-1d9b716cedef/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 22:24:29,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:24:29,845 INFO L262 TraceCheckSpWp]: Trace formula consists of 715 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-06 22:24:29,854 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:24:33,631 INFO L134 CoverageAnalysis]: Checked inductivity of 4704 backedges. 518 proven. 396 refuted. 0 times theorem prover too weak. 3790 trivial. 0 not checked. [2023-11-06 22:24:33,632 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:25:52,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:25:52,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593936319] [2023-11-06 22:25:52,644 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:25:52,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406425526] [2023-11-06 22:25:52,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406425526] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:25:52,644 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:25:52,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2023-11-06 22:25:52,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224104723] [2023-11-06 22:25:52,645 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-06 22:25:52,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-06 22:25:52,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:25:52,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-06 22:25:52,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=477, Unknown=4, NotChecked=0, Total=650 [2023-11-06 22:25:52,647 INFO L87 Difference]: Start difference. First operand 639 states and 896 transitions. Second operand has 17 states, 17 states have (on average 4.470588235294118) internal successors, (76), 15 states have internal predecessors, (76), 4 states have call successors, (49), 4 states have call predecessors, (49), 5 states have return successors, (49), 4 states have call predecessors, (49), 4 states have call successors, (49)