./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_100-while_file-68.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09761d8f-bf23-4945-8d14-45ca8ed823a2/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09761d8f-bf23-4945-8d14-45ca8ed823a2/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09761d8f-bf23-4945-8d14-45ca8ed823a2/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09761d8f-bf23-4945-8d14-45ca8ed823a2/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_100-while_file-68.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09761d8f-bf23-4945-8d14-45ca8ed823a2/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09761d8f-bf23-4945-8d14-45ca8ed823a2/bin/uautomizer-verify-uCwYo4JHxu --witnessprinter.witness.filename witness --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 a50f9ed11f10306280cf680a91856fa84d69e79835a7539c0719fe95b31ba9a8 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:49:29,313 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:49:29,431 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09761d8f-bf23-4945-8d14-45ca8ed823a2/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 07:49:29,441 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:49:29,443 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:49:29,484 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:49:29,485 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:49:29,486 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:49:29,489 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:49:29,494 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:49:29,495 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:49:29,496 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:49:29,496 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:49:29,499 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:49:29,499 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:49:29,500 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:49:29,501 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:49:29,501 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:49:29,502 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:49:29,502 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:49:29,503 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:49:29,504 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:49:29,504 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:49:29,505 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:49:29,505 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:49:29,507 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:49:29,507 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:49:29,508 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:49:29,509 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:49:29,509 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:49:29,511 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:49:29,511 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:49:29,512 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:49:29,512 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:49:29,512 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:49:29,513 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:49:29,513 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:49:29,513 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:49:29,514 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:49:29,514 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_09761d8f-bf23-4945-8d14-45ca8ed823a2/bin/uautomizer-verify-uCwYo4JHxu/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09761d8f-bf23-4945-8d14-45ca8ed823a2/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a50f9ed11f10306280cf680a91856fa84d69e79835a7539c0719fe95b31ba9a8 [2023-11-19 07:49:29,796 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:49:29,819 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:49:29,821 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:49:29,823 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:49:29,823 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:49:29,824 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09761d8f-bf23-4945-8d14-45ca8ed823a2/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_100-while_file-68.i [2023-11-19 07:49:33,070 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:49:33,354 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:49:33,357 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09761d8f-bf23-4945-8d14-45ca8ed823a2/sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_100-while_file-68.i [2023-11-19 07:49:33,371 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09761d8f-bf23-4945-8d14-45ca8ed823a2/bin/uautomizer-verify-uCwYo4JHxu/data/57da7850f/cf1d6fb511a740f2afa4d457895b129c/FLAG060b4905f [2023-11-19 07:49:33,391 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09761d8f-bf23-4945-8d14-45ca8ed823a2/bin/uautomizer-verify-uCwYo4JHxu/data/57da7850f/cf1d6fb511a740f2afa4d457895b129c [2023-11-19 07:49:33,398 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:49:33,400 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:49:33,403 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:49:33,404 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:49:33,410 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:49:33,410 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:49:33" (1/1) ... [2023-11-19 07:49:33,412 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44b589ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:49:33, skipping insertion in model container [2023-11-19 07:49:33,412 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:49:33" (1/1) ... [2023-11-19 07:49:33,468 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:49:33,654 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_09761d8f-bf23-4945-8d14-45ca8ed823a2/sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_100-while_file-68.i[916,929] [2023-11-19 07:49:33,781 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:49:33,802 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:49:33,819 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_09761d8f-bf23-4945-8d14-45ca8ed823a2/sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_100-while_file-68.i[916,929] [2023-11-19 07:49:33,867 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:49:33,887 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:49:33,887 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:49:33 WrapperNode [2023-11-19 07:49:33,888 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:49:33,889 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:49:33,889 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:49:33,889 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:49:33,898 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:49:33" (1/1) ... [2023-11-19 07:49:33,928 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:49:33" (1/1) ... [2023-11-19 07:49:34,016 INFO L138 Inliner]: procedures = 26, calls = 53, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 358 [2023-11-19 07:49:34,020 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:49:34,021 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:49:34,022 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:49:34,022 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:49:34,032 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:49:33" (1/1) ... [2023-11-19 07:49:34,032 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:49:33" (1/1) ... [2023-11-19 07:49:34,051 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:49:33" (1/1) ... [2023-11-19 07:49:34,058 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:49:33" (1/1) ... [2023-11-19 07:49:34,092 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:49:33" (1/1) ... [2023-11-19 07:49:34,112 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:49:33" (1/1) ... [2023-11-19 07:49:34,119 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:49:33" (1/1) ... [2023-11-19 07:49:34,124 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:49:33" (1/1) ... [2023-11-19 07:49:34,142 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:49:34,148 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:49:34,149 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:49:34,150 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:49:34,151 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:49:33" (1/1) ... [2023-11-19 07:49:34,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:49:34,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09761d8f-bf23-4945-8d14-45ca8ed823a2/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:49:34,193 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09761d8f-bf23-4945-8d14-45ca8ed823a2/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:49:34,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09761d8f-bf23-4945-8d14-45ca8ed823a2/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:49:34,265 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:49:34,265 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-19 07:49:34,266 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-19 07:49:34,266 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:49:34,266 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:49:34,266 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:49:34,412 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:49:34,415 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:49:35,237 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:49:35,253 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:49:35,254 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-19 07:49:35,265 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:49:35 BoogieIcfgContainer [2023-11-19 07:49:35,266 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:49:35,271 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:49:35,272 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:49:35,276 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:49:35,276 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:49:33" (1/3) ... [2023-11-19 07:49:35,277 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@791feaa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:49:35, skipping insertion in model container [2023-11-19 07:49:35,277 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:49:33" (2/3) ... [2023-11-19 07:49:35,278 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@791feaa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:49:35, skipping insertion in model container [2023-11-19 07:49:35,278 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:49:35" (3/3) ... [2023-11-19 07:49:35,279 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_loopvsstraightlinecode_100-while_file-68.i [2023-11-19 07:49:35,302 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:49:35,302 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 07:49:35,378 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:49:35,386 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=LoopHeads, 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;@7c740988, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:49:35,387 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 07:49:35,393 INFO L276 IsEmpty]: Start isEmpty. Operand has 149 states, 106 states have (on average 1.5188679245283019) internal successors, (161), 107 states have internal predecessors, (161), 40 states have call successors, (40), 1 states have call predecessors, (40), 1 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2023-11-19 07:49:35,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2023-11-19 07:49:35,420 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:49:35,421 INFO L195 NwaCegarLoop]: trace histogram [40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:49:35,421 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:49:35,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:49:35,427 INFO L85 PathProgramCache]: Analyzing trace with hash -1470835136, now seen corresponding path program 1 times [2023-11-19 07:49:35,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:49:35,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703382580] [2023-11-19 07:49:35,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:49:35,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:49:35,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:49:35,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:49:35,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703382580] [2023-11-19 07:49:35,854 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-19 07:49:35,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001216544] [2023-11-19 07:49:35,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:49:35,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:49:35,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09761d8f-bf23-4945-8d14-45ca8ed823a2/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:49:35,857 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09761d8f-bf23-4945-8d14-45ca8ed823a2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:49:35,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09761d8f-bf23-4945-8d14-45ca8ed823a2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:49:36,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:49:36,153 INFO L262 TraceCheckSpWp]: Trace formula consists of 635 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-19 07:49:36,185 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:49:36,290 INFO L134 CoverageAnalysis]: Checked inductivity of 3120 backedges. 78 proven. 0 refuted. 0 times theorem prover too weak. 3042 trivial. 0 not checked. [2023-11-19 07:49:36,296 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:49:36,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001216544] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:49:36,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:49:36,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:49:36,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145471451] [2023-11-19 07:49:36,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:49:36,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 07:49:36,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:49:36,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 07:49:36,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 07:49:36,364 INFO L87 Difference]: Start difference. First operand has 149 states, 106 states have (on average 1.5188679245283019) internal successors, (161), 107 states have internal predecessors, (161), 40 states have call successors, (40), 1 states have call predecessors, (40), 1 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) Second operand has 2 states, 2 states have (on average 37.0) internal successors, (74), 2 states have internal predecessors, (74), 2 states have call successors, (40), 2 states have call predecessors, (40), 1 states have return successors, (40), 1 states have call predecessors, (40), 2 states have call successors, (40) [2023-11-19 07:49:36,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:49:36,440 INFO L93 Difference]: Finished difference Result 291 states and 516 transitions. [2023-11-19 07:49:36,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 07:49:36,443 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 37.0) internal successors, (74), 2 states have internal predecessors, (74), 2 states have call successors, (40), 2 states have call predecessors, (40), 1 states have return successors, (40), 1 states have call predecessors, (40), 2 states have call successors, (40) Word has length 269 [2023-11-19 07:49:36,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:49:36,458 INFO L225 Difference]: With dead ends: 291 [2023-11-19 07:49:36,458 INFO L226 Difference]: Without dead ends: 145 [2023-11-19 07:49:36,468 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 268 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 07:49:36,472 INFO L413 NwaCegarLoop]: 234 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, 234 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 [2023-11-19 07:49:36,474 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:49:36,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2023-11-19 07:49:36,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2023-11-19 07:49:36,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 103 states have (on average 1.4951456310679612) internal successors, (154), 103 states have internal predecessors, (154), 40 states have call successors, (40), 1 states have call predecessors, (40), 1 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2023-11-19 07:49:36,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 234 transitions. [2023-11-19 07:49:36,536 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 234 transitions. Word has length 269 [2023-11-19 07:49:36,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:49:36,537 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 234 transitions. [2023-11-19 07:49:36,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 37.0) internal successors, (74), 2 states have internal predecessors, (74), 2 states have call successors, (40), 2 states have call predecessors, (40), 1 states have return successors, (40), 1 states have call predecessors, (40), 2 states have call successors, (40) [2023-11-19 07:49:36,538 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 234 transitions. [2023-11-19 07:49:36,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2023-11-19 07:49:36,545 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:49:36,545 INFO L195 NwaCegarLoop]: trace histogram [40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:49:36,567 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09761d8f-bf23-4945-8d14-45ca8ed823a2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-19 07:49:36,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09761d8f-bf23-4945-8d14-45ca8ed823a2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-19 07:49:36,759 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:49:36,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:49:36,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1536737924, now seen corresponding path program 1 times [2023-11-19 07:49:36,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:49:36,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783152635] [2023-11-19 07:49:36,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:49:36,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:49:36,917 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:49:36,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [886531814] [2023-11-19 07:49:36,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:49:36,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:49:36,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09761d8f-bf23-4945-8d14-45ca8ed823a2/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:49:36,925 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09761d8f-bf23-4945-8d14-45ca8ed823a2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:49:36,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09761d8f-bf23-4945-8d14-45ca8ed823a2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:49:37,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:49:37,208 INFO L262 TraceCheckSpWp]: Trace formula consists of 635 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 07:49:37,222 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:49:37,313 INFO L134 CoverageAnalysis]: Checked inductivity of 3120 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3120 trivial. 0 not checked. [2023-11-19 07:49:37,314 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:49:37,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:49:37,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783152635] [2023-11-19 07:49:37,315 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:49:37,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886531814] [2023-11-19 07:49:37,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886531814] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:49:37,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:49:37,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:49:37,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610148569] [2023-11-19 07:49:37,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:49:37,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:49:37,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:49:37,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:49:37,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:49:37,320 INFO L87 Difference]: Start difference. First operand 145 states and 234 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 1 states have call successors, (40), 1 states have call predecessors, (40), 1 states have return successors, (40), 1 states have call predecessors, (40), 1 states have call successors, (40) [2023-11-19 07:49:37,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:49:37,351 INFO L93 Difference]: Finished difference Result 287 states and 465 transitions. [2023-11-19 07:49:37,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:49:37,352 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 1 states have call successors, (40), 1 states have call predecessors, (40), 1 states have return successors, (40), 1 states have call predecessors, (40), 1 states have call successors, (40) Word has length 269 [2023-11-19 07:49:37,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:49:37,357 INFO L225 Difference]: With dead ends: 287 [2023-11-19 07:49:37,357 INFO L226 Difference]: Without dead ends: 145 [2023-11-19 07:49:37,358 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 267 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:49:37,360 INFO L413 NwaCegarLoop]: 232 mSDtfsCounter, 57 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:49:37,361 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 405 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:49:37,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2023-11-19 07:49:37,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2023-11-19 07:49:37,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 103 states have (on average 1.4854368932038835) internal successors, (153), 103 states have internal predecessors, (153), 40 states have call successors, (40), 1 states have call predecessors, (40), 1 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2023-11-19 07:49:37,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 233 transitions. [2023-11-19 07:49:37,383 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 233 transitions. Word has length 269 [2023-11-19 07:49:37,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:49:37,386 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 233 transitions. [2023-11-19 07:49:37,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 1 states have call successors, (40), 1 states have call predecessors, (40), 1 states have return successors, (40), 1 states have call predecessors, (40), 1 states have call successors, (40) [2023-11-19 07:49:37,387 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 233 transitions. [2023-11-19 07:49:37,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2023-11-19 07:49:37,392 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:49:37,393 INFO L195 NwaCegarLoop]: trace histogram [40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:49:37,420 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09761d8f-bf23-4945-8d14-45ca8ed823a2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:49:37,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09761d8f-bf23-4945-8d14-45ca8ed823a2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:49:37,594 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:49:37,594 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:49:37,595 INFO L85 PathProgramCache]: Analyzing trace with hash -1931104710, now seen corresponding path program 1 times [2023-11-19 07:49:37,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:49:37,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961703357] [2023-11-19 07:49:37,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:49:37,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:49:37,702 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:49:37,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1129916782] [2023-11-19 07:49:37,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:49:37,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:49:37,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09761d8f-bf23-4945-8d14-45ca8ed823a2/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:49:37,724 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09761d8f-bf23-4945-8d14-45ca8ed823a2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:49:37,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09761d8f-bf23-4945-8d14-45ca8ed823a2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:49:37,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:49:37,996 INFO L262 TraceCheckSpWp]: Trace formula consists of 633 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-19 07:49:38,006 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:49:38,927 INFO L134 CoverageAnalysis]: Checked inductivity of 3120 backedges. 1543 proven. 147 refuted. 0 times theorem prover too weak. 1430 trivial. 0 not checked. [2023-11-19 07:49:38,927 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:49:39,468 INFO L134 CoverageAnalysis]: Checked inductivity of 3120 backedges. 81 proven. 150 refuted. 0 times theorem prover too weak. 2889 trivial. 0 not checked. [2023-11-19 07:49:39,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:49:39,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961703357] [2023-11-19 07:49:39,469 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:49:39,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129916782] [2023-11-19 07:49:39,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129916782] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:49:39,469 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:49:39,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2023-11-19 07:49:39,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961954610] [2023-11-19 07:49:39,471 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:49:39,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-19 07:49:39,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:49:39,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-19 07:49:39,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2023-11-19 07:49:39,479 INFO L87 Difference]: Start difference. First operand 145 states and 233 transitions. Second operand has 14 states, 14 states have (on average 7.714285714285714) internal successors, (108), 14 states have internal predecessors, (108), 5 states have call successors, (66), 3 states have call predecessors, (66), 7 states have return successors, (67), 5 states have call predecessors, (67), 5 states have call successors, (67) [2023-11-19 07:49:39,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:49:39,930 INFO L93 Difference]: Finished difference Result 297 states and 471 transitions. [2023-11-19 07:49:39,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-19 07:49:39,931 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 7.714285714285714) internal successors, (108), 14 states have internal predecessors, (108), 5 states have call successors, (66), 3 states have call predecessors, (66), 7 states have return successors, (67), 5 states have call predecessors, (67), 5 states have call successors, (67) Word has length 269 [2023-11-19 07:49:39,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:49:39,934 INFO L225 Difference]: With dead ends: 297 [2023-11-19 07:49:39,935 INFO L226 Difference]: Without dead ends: 155 [2023-11-19 07:49:39,936 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 542 GetRequests, 524 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=140, Invalid=240, Unknown=0, NotChecked=0, Total=380 [2023-11-19 07:49:39,937 INFO L413 NwaCegarLoop]: 178 mSDtfsCounter, 152 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 07:49:39,938 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 454 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 07:49:39,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2023-11-19 07:49:39,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 153. [2023-11-19 07:49:39,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 109 states have (on average 1.4403669724770642) internal successors, (157), 109 states have internal predecessors, (157), 40 states have call successors, (40), 3 states have call predecessors, (40), 3 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2023-11-19 07:49:39,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 237 transitions. [2023-11-19 07:49:39,974 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 237 transitions. Word has length 269 [2023-11-19 07:49:39,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:49:39,977 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 237 transitions. [2023-11-19 07:49:39,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.714285714285714) internal successors, (108), 14 states have internal predecessors, (108), 5 states have call successors, (66), 3 states have call predecessors, (66), 7 states have return successors, (67), 5 states have call predecessors, (67), 5 states have call successors, (67) [2023-11-19 07:49:39,977 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 237 transitions. [2023-11-19 07:49:39,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2023-11-19 07:49:39,983 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:49:39,983 INFO L195 NwaCegarLoop]: trace histogram [40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:49:40,005 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09761d8f-bf23-4945-8d14-45ca8ed823a2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 07:49:40,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09761d8f-bf23-4945-8d14-45ca8ed823a2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:49:40,205 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:49:40,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:49:40,206 INFO L85 PathProgramCache]: Analyzing trace with hash 518495420, now seen corresponding path program 1 times [2023-11-19 07:49:40,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:49:40,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790775951] [2023-11-19 07:49:40,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:49:40,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:49:40,315 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:49:40,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [485483920] [2023-11-19 07:49:40,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:49:40,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:49:40,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09761d8f-bf23-4945-8d14-45ca8ed823a2/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:49:40,320 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09761d8f-bf23-4945-8d14-45ca8ed823a2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:49:40,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09761d8f-bf23-4945-8d14-45ca8ed823a2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 07:49:40,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:49:40,552 INFO L262 TraceCheckSpWp]: Trace formula consists of 633 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:49:40,559 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:49:40,933 INFO L134 CoverageAnalysis]: Checked inductivity of 3120 backedges. 477 proven. 108 refuted. 0 times theorem prover too weak. 2535 trivial. 0 not checked. [2023-11-19 07:49:40,933 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:49:41,208 INFO L134 CoverageAnalysis]: Checked inductivity of 3120 backedges. 9 proven. 108 refuted. 0 times theorem prover too weak. 3003 trivial. 0 not checked. [2023-11-19 07:49:41,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:49:41,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790775951] [2023-11-19 07:49:41,209 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:49:41,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485483920] [2023-11-19 07:49:41,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485483920] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:49:41,210 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:49:41,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-11-19 07:49:41,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799035112] [2023-11-19 07:49:41,210 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:49:41,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 07:49:41,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:49:41,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 07:49:41,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:49:41,213 INFO L87 Difference]: Start difference. First operand 153 states and 237 transitions. Second operand has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 3 states have call successors, (76), 2 states have call predecessors, (76), 4 states have return successors, (77), 3 states have call predecessors, (77), 3 states have call successors, (77) [2023-11-19 07:49:41,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:49:41,547 INFO L93 Difference]: Finished difference Result 309 states and 476 transitions. [2023-11-19 07:49:41,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 07:49:41,548 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 3 states have call successors, (76), 2 states have call predecessors, (76), 4 states have return successors, (77), 3 states have call predecessors, (77), 3 states have call successors, (77) Word has length 269 [2023-11-19 07:49:41,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:49:41,551 INFO L225 Difference]: With dead ends: 309 [2023-11-19 07:49:41,551 INFO L226 Difference]: Without dead ends: 159 [2023-11-19 07:49:41,552 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 540 GetRequests, 530 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2023-11-19 07:49:41,553 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 222 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 07:49:41,554 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [225 Valid, 392 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 07:49:41,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2023-11-19 07:49:41,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 157. [2023-11-19 07:49:41,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 112 states have (on average 1.3571428571428572) internal successors, (152), 112 states have internal predecessors, (152), 40 states have call successors, (40), 4 states have call predecessors, (40), 4 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2023-11-19 07:49:41,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 232 transitions. [2023-11-19 07:49:41,579 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 232 transitions. Word has length 269 [2023-11-19 07:49:41,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:49:41,580 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 232 transitions. [2023-11-19 07:49:41,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 3 states have call successors, (76), 2 states have call predecessors, (76), 4 states have return successors, (77), 3 states have call predecessors, (77), 3 states have call successors, (77) [2023-11-19 07:49:41,580 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 232 transitions. [2023-11-19 07:49:41,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2023-11-19 07:49:41,585 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:49:41,586 INFO L195 NwaCegarLoop]: trace histogram [40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:49:41,616 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09761d8f-bf23-4945-8d14-45ca8ed823a2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 07:49:41,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09761d8f-bf23-4945-8d14-45ca8ed823a2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:49:41,806 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:49:41,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:49:41,807 INFO L85 PathProgramCache]: Analyzing trace with hash -1192747238, now seen corresponding path program 1 times [2023-11-19 07:49:41,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:49:41,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513295249] [2023-11-19 07:49:41,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:49:41,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:49:41,876 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:49:41,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1746910438] [2023-11-19 07:49:41,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:49:41,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:49:41,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09761d8f-bf23-4945-8d14-45ca8ed823a2/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:49:41,878 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09761d8f-bf23-4945-8d14-45ca8ed823a2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:49:41,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09761d8f-bf23-4945-8d14-45ca8ed823a2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 07:49:42,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:49:42,099 INFO L262 TraceCheckSpWp]: Trace formula consists of 634 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-19 07:49:42,105 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:49:42,282 INFO L134 CoverageAnalysis]: Checked inductivity of 3120 backedges. 1327 proven. 33 refuted. 0 times theorem prover too weak. 1760 trivial. 0 not checked. [2023-11-19 07:49:42,282 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:49:42,545 INFO L134 CoverageAnalysis]: Checked inductivity of 3120 backedges. 84 proven. 33 refuted. 0 times theorem prover too weak. 3003 trivial. 0 not checked. [2023-11-19 07:49:42,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:49:42,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513295249] [2023-11-19 07:49:42,546 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:49:42,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746910438] [2023-11-19 07:49:42,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746910438] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:49:42,546 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:49:42,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-11-19 07:49:42,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469139170] [2023-11-19 07:49:42,547 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:49:42,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-19 07:49:42,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:49:42,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-19 07:49:42,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-11-19 07:49:42,549 INFO L87 Difference]: Start difference. First operand 157 states and 232 transitions. Second operand has 12 states, 12 states have (on average 8.666666666666666) internal successors, (104), 12 states have internal predecessors, (104), 3 states have call successors, (51), 2 states have call predecessors, (51), 4 states have return successors, (52), 3 states have call predecessors, (52), 3 states have call successors, (52) [2023-11-19 07:49:43,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:49:43,212 INFO L93 Difference]: Finished difference Result 325 states and 475 transitions. [2023-11-19 07:49:43,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-19 07:49:43,214 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.666666666666666) internal successors, (104), 12 states have internal predecessors, (104), 3 states have call successors, (51), 2 states have call predecessors, (51), 4 states have return successors, (52), 3 states have call predecessors, (52), 3 states have call successors, (52) Word has length 270 [2023-11-19 07:49:43,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:49:43,217 INFO L225 Difference]: With dead ends: 325 [2023-11-19 07:49:43,217 INFO L226 Difference]: Without dead ends: 171 [2023-11-19 07:49:43,218 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 546 GetRequests, 528 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2023-11-19 07:49:43,219 INFO L413 NwaCegarLoop]: 147 mSDtfsCounter, 283 mSDsluCounter, 471 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 310 SdHoareTripleChecker+Valid, 618 SdHoareTripleChecker+Invalid, 674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 07:49:43,219 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [310 Valid, 618 Invalid, 674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 610 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 07:49:43,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2023-11-19 07:49:43,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 166. [2023-11-19 07:49:43,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 119 states have (on average 1.3361344537815125) internal successors, (159), 119 states have internal predecessors, (159), 40 states have call successors, (40), 6 states have call predecessors, (40), 6 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2023-11-19 07:49:43,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 239 transitions. [2023-11-19 07:49:43,242 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 239 transitions. Word has length 270 [2023-11-19 07:49:43,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:49:43,243 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 239 transitions. [2023-11-19 07:49:43,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.666666666666666) internal successors, (104), 12 states have internal predecessors, (104), 3 states have call successors, (51), 2 states have call predecessors, (51), 4 states have return successors, (52), 3 states have call predecessors, (52), 3 states have call successors, (52) [2023-11-19 07:49:43,244 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 239 transitions. [2023-11-19 07:49:43,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2023-11-19 07:49:43,249 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:49:43,249 INFO L195 NwaCegarLoop]: trace histogram [40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:49:43,280 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09761d8f-bf23-4945-8d14-45ca8ed823a2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 07:49:43,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09761d8f-bf23-4945-8d14-45ca8ed823a2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:49:43,476 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:49:43,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:49:43,476 INFO L85 PathProgramCache]: Analyzing trace with hash 209356178, now seen corresponding path program 1 times [2023-11-19 07:49:43,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:49:43,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649869467] [2023-11-19 07:49:43,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:49:43,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:49:43,521 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:49:43,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [944874489] [2023-11-19 07:49:43,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:49:43,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:49:43,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09761d8f-bf23-4945-8d14-45ca8ed823a2/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:49:43,547 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09761d8f-bf23-4945-8d14-45ca8ed823a2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:49:43,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09761d8f-bf23-4945-8d14-45ca8ed823a2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 07:49:43,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:49:43,781 INFO L262 TraceCheckSpWp]: Trace formula consists of 637 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 07:49:43,788 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:49:44,194 INFO L134 CoverageAnalysis]: Checked inductivity of 3120 backedges. 477 proven. 108 refuted. 0 times theorem prover too weak. 2535 trivial. 0 not checked. [2023-11-19 07:49:44,195 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:49:44,556 INFO L134 CoverageAnalysis]: Checked inductivity of 3120 backedges. 9 proven. 108 refuted. 0 times theorem prover too weak. 3003 trivial. 0 not checked. [2023-11-19 07:49:44,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:49:44,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649869467] [2023-11-19 07:49:44,557 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:49:44,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944874489] [2023-11-19 07:49:44,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944874489] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:49:44,557 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:49:44,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-11-19 07:49:44,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635045895] [2023-11-19 07:49:44,558 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:49:44,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-19 07:49:44,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:49:44,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-19 07:49:44,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-11-19 07:49:44,561 INFO L87 Difference]: Start difference. First operand 166 states and 239 transitions. Second operand has 10 states, 10 states have (on average 11.8) internal successors, (118), 10 states have internal predecessors, (118), 3 states have call successors, (76), 2 states have call predecessors, (76), 4 states have return successors, (77), 3 states have call predecessors, (77), 3 states have call successors, (77) [2023-11-19 07:49:45,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:49:45,033 INFO L93 Difference]: Finished difference Result 335 states and 483 transitions. [2023-11-19 07:49:45,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-19 07:49:45,034 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 11.8) internal successors, (118), 10 states have internal predecessors, (118), 3 states have call successors, (76), 2 states have call predecessors, (76), 4 states have return successors, (77), 3 states have call predecessors, (77), 3 states have call successors, (77) Word has length 271 [2023-11-19 07:49:45,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:49:45,037 INFO L225 Difference]: With dead ends: 335 [2023-11-19 07:49:45,037 INFO L226 Difference]: Without dead ends: 172 [2023-11-19 07:49:45,038 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 545 GetRequests, 532 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2023-11-19 07:49:45,039 INFO L413 NwaCegarLoop]: 156 mSDtfsCounter, 339 mSDsluCounter, 528 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 684 SdHoareTripleChecker+Invalid, 448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 07:49:45,039 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [342 Valid, 684 Invalid, 448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 07:49:45,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2023-11-19 07:49:45,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 167. [2023-11-19 07:49:45,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 120 states have (on average 1.3333333333333333) internal successors, (160), 120 states have internal predecessors, (160), 40 states have call successors, (40), 6 states have call predecessors, (40), 6 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2023-11-19 07:49:45,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 240 transitions. [2023-11-19 07:49:45,065 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 240 transitions. Word has length 271 [2023-11-19 07:49:45,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:49:45,066 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 240 transitions. [2023-11-19 07:49:45,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.8) internal successors, (118), 10 states have internal predecessors, (118), 3 states have call successors, (76), 2 states have call predecessors, (76), 4 states have return successors, (77), 3 states have call predecessors, (77), 3 states have call successors, (77) [2023-11-19 07:49:45,067 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 240 transitions. [2023-11-19 07:49:45,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2023-11-19 07:49:45,070 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:49:45,070 INFO L195 NwaCegarLoop]: trace histogram [40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:49:45,099 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09761d8f-bf23-4945-8d14-45ca8ed823a2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 07:49:45,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09761d8f-bf23-4945-8d14-45ca8ed823a2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-19 07:49:45,290 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:49:45,291 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:49:45,291 INFO L85 PathProgramCache]: Analyzing trace with hash 1595559572, now seen corresponding path program 1 times [2023-11-19 07:49:45,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:49:45,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353945075] [2023-11-19 07:49:45,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:49:45,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:49:45,361 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:49:45,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [423101955] [2023-11-19 07:49:45,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:49:45,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:49:45,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09761d8f-bf23-4945-8d14-45ca8ed823a2/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:49:45,363 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09761d8f-bf23-4945-8d14-45ca8ed823a2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:49:45,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09761d8f-bf23-4945-8d14-45ca8ed823a2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 07:49:45,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:49:45,610 INFO L262 TraceCheckSpWp]: Trace formula consists of 636 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-19 07:49:45,617 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:49:45,989 INFO L134 CoverageAnalysis]: Checked inductivity of 3120 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3120 trivial. 0 not checked. [2023-11-19 07:49:45,989 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:49:45,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:49:45,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353945075] [2023-11-19 07:49:45,990 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:49:45,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423101955] [2023-11-19 07:49:45,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423101955] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:49:45,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:49:45,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:49:45,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124943965] [2023-11-19 07:49:45,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:49:45,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 07:49:45,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:49:45,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 07:49:45,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:49:45,993 INFO L87 Difference]: Start difference. First operand 167 states and 240 transitions. Second operand has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 5 states have internal predecessors, (74), 1 states have call successors, (40), 1 states have call predecessors, (40), 1 states have return successors, (40), 1 states have call predecessors, (40), 1 states have call successors, (40) [2023-11-19 07:49:46,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:49:46,611 INFO L93 Difference]: Finished difference Result 599 states and 855 transitions. [2023-11-19 07:49:46,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 07:49:46,622 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 5 states have internal predecessors, (74), 1 states have call successors, (40), 1 states have call predecessors, (40), 1 states have return successors, (40), 1 states have call predecessors, (40), 1 states have call successors, (40) Word has length 271 [2023-11-19 07:49:46,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:49:46,626 INFO L225 Difference]: With dead ends: 599 [2023-11-19 07:49:46,627 INFO L226 Difference]: Without dead ends: 435 [2023-11-19 07:49:46,628 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 266 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:49:46,634 INFO L413 NwaCegarLoop]: 260 mSDtfsCounter, 324 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 707 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 07:49:46,635 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [324 Valid, 707 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 363 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 07:49:46,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2023-11-19 07:49:46,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 334. [2023-11-19 07:49:46,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 240 states have (on average 1.3333333333333333) internal successors, (320), 240 states have internal predecessors, (320), 80 states have call successors, (80), 13 states have call predecessors, (80), 13 states have return successors, (80), 80 states have call predecessors, (80), 80 states have call successors, (80) [2023-11-19 07:49:46,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 480 transitions. [2023-11-19 07:49:46,684 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 480 transitions. Word has length 271 [2023-11-19 07:49:46,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:49:46,685 INFO L495 AbstractCegarLoop]: Abstraction has 334 states and 480 transitions. [2023-11-19 07:49:46,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 5 states have internal predecessors, (74), 1 states have call successors, (40), 1 states have call predecessors, (40), 1 states have return successors, (40), 1 states have call predecessors, (40), 1 states have call successors, (40) [2023-11-19 07:49:46,686 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 480 transitions. [2023-11-19 07:49:46,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2023-11-19 07:49:46,688 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:49:46,688 INFO L195 NwaCegarLoop]: trace histogram [40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:49:46,716 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09761d8f-bf23-4945-8d14-45ca8ed823a2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-19 07:49:46,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09761d8f-bf23-4945-8d14-45ca8ed823a2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:49:46,905 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:49:46,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:49:46,906 INFO L85 PathProgramCache]: Analyzing trace with hash 1667946130, now seen corresponding path program 1 times [2023-11-19 07:49:46,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:49:46,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149631553] [2023-11-19 07:49:46,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:49:46,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:49:46,960 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:49:46,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1597499758] [2023-11-19 07:49:46,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:49:46,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:49:46,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09761d8f-bf23-4945-8d14-45ca8ed823a2/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:49:46,962 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09761d8f-bf23-4945-8d14-45ca8ed823a2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:49:46,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09761d8f-bf23-4945-8d14-45ca8ed823a2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 07:49:47,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:49:47,260 INFO L262 TraceCheckSpWp]: Trace formula consists of 639 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-19 07:49:47,267 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:49:47,640 INFO L134 CoverageAnalysis]: Checked inductivity of 3120 backedges. 1190 proven. 48 refuted. 0 times theorem prover too weak. 1882 trivial. 0 not checked. [2023-11-19 07:49:47,640 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:49:47,892 INFO L134 CoverageAnalysis]: Checked inductivity of 3120 backedges. 90 proven. 27 refuted. 0 times theorem prover too weak. 3003 trivial. 0 not checked. [2023-11-19 07:49:47,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:49:47,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149631553] [2023-11-19 07:49:47,893 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:49:47,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597499758] [2023-11-19 07:49:47,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597499758] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:49:47,893 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:49:47,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 13 [2023-11-19 07:49:47,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172341000] [2023-11-19 07:49:47,894 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:49:47,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-19 07:49:47,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:49:47,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-19 07:49:47,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-11-19 07:49:47,896 INFO L87 Difference]: Start difference. First operand 334 states and 480 transitions. Second operand has 13 states, 13 states have (on average 7.769230769230769) internal successors, (101), 13 states have internal predecessors, (101), 3 states have call successors, (49), 3 states have call predecessors, (49), 5 states have return successors, (50), 3 states have call predecessors, (50), 3 states have call successors, (50) [2023-11-19 07:49:49,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:49:49,378 INFO L93 Difference]: Finished difference Result 1385 states and 1951 transitions. [2023-11-19 07:49:49,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-19 07:49:49,379 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 7.769230769230769) internal successors, (101), 13 states have internal predecessors, (101), 3 states have call successors, (49), 3 states have call predecessors, (49), 5 states have return successors, (50), 3 states have call predecessors, (50), 3 states have call successors, (50) Word has length 271 [2023-11-19 07:49:49,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:49:49,387 INFO L225 Difference]: With dead ends: 1385 [2023-11-19 07:49:49,388 INFO L226 Difference]: Without dead ends: 1054 [2023-11-19 07:49:49,390 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 568 GetRequests, 530 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=348, Invalid=984, Unknown=0, NotChecked=0, Total=1332 [2023-11-19 07:49:49,391 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 1098 mSDsluCounter, 1080 mSDsCounter, 0 mSdLazyCounter, 736 mSolverCounterSat, 466 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1130 SdHoareTripleChecker+Valid, 1244 SdHoareTripleChecker+Invalid, 1202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 466 IncrementalHoareTripleChecker+Valid, 736 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:49:49,391 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1130 Valid, 1244 Invalid, 1202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [466 Valid, 736 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-19 07:49:49,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1054 states. [2023-11-19 07:49:49,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1054 to 368. [2023-11-19 07:49:49,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 270 states have (on average 1.325925925925926) internal successors, (358), 270 states have internal predecessors, (358), 80 states have call successors, (80), 17 states have call predecessors, (80), 17 states have return successors, (80), 80 states have call predecessors, (80), 80 states have call successors, (80) [2023-11-19 07:49:49,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 518 transitions. [2023-11-19 07:49:49,477 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 518 transitions. Word has length 271 [2023-11-19 07:49:49,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:49:49,478 INFO L495 AbstractCegarLoop]: Abstraction has 368 states and 518 transitions. [2023-11-19 07:49:49,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.769230769230769) internal successors, (101), 13 states have internal predecessors, (101), 3 states have call successors, (49), 3 states have call predecessors, (49), 5 states have return successors, (50), 3 states have call predecessors, (50), 3 states have call successors, (50) [2023-11-19 07:49:49,478 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 518 transitions. [2023-11-19 07:49:49,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2023-11-19 07:49:49,481 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:49:49,481 INFO L195 NwaCegarLoop]: trace histogram [40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:49:49,492 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09761d8f-bf23-4945-8d14-45ca8ed823a2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-19 07:49:49,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09761d8f-bf23-4945-8d14-45ca8ed823a2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:49:49,688 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:49:49,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:49:49,689 INFO L85 PathProgramCache]: Analyzing trace with hash 1273579344, now seen corresponding path program 1 times [2023-11-19 07:49:49,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:49:49,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514470260] [2023-11-19 07:49:49,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:49:49,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:49:49,763 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:49:49,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [65759019] [2023-11-19 07:49:49,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:49:49,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:49:49,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09761d8f-bf23-4945-8d14-45ca8ed823a2/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:49:49,765 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09761d8f-bf23-4945-8d14-45ca8ed823a2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:49:49,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09761d8f-bf23-4945-8d14-45ca8ed823a2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-19 07:49:50,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:49:50,013 INFO L262 TraceCheckSpWp]: Trace formula consists of 639 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-19 07:49:50,021 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:49:51,139 INFO L134 CoverageAnalysis]: Checked inductivity of 3120 backedges. 1613 proven. 213 refuted. 0 times theorem prover too weak. 1294 trivial. 0 not checked. [2023-11-19 07:49:51,139 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:49:52,240 INFO L134 CoverageAnalysis]: Checked inductivity of 3120 backedges. 120 proven. 222 refuted. 0 times theorem prover too weak. 2778 trivial. 0 not checked. [2023-11-19 07:49:52,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:49:52,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514470260] [2023-11-19 07:49:52,241 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:49:52,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65759019] [2023-11-19 07:49:52,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65759019] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:49:52,241 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:49:52,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2023-11-19 07:49:52,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706438014] [2023-11-19 07:49:52,242 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:49:52,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-19 07:49:52,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:49:52,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-19 07:49:52,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=587, Unknown=0, NotChecked=0, Total=756 [2023-11-19 07:49:52,245 INFO L87 Difference]: Start difference. First operand 368 states and 518 transitions. Second operand has 28 states, 27 states have (on average 4.925925925925926) internal successors, (133), 26 states have internal predecessors, (133), 7 states have call successors, (67), 4 states have call predecessors, (67), 9 states have return successors, (68), 7 states have call predecessors, (68), 7 states have call successors, (68) [2023-11-19 07:49:56,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:49:56,800 INFO L93 Difference]: Finished difference Result 1079 states and 1503 transitions. [2023-11-19 07:49:56,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2023-11-19 07:49:56,800 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 4.925925925925926) internal successors, (133), 26 states have internal predecessors, (133), 7 states have call successors, (67), 4 states have call predecessors, (67), 9 states have return successors, (68), 7 states have call predecessors, (68), 7 states have call successors, (68) Word has length 271 [2023-11-19 07:49:56,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:49:56,807 INFO L225 Difference]: With dead ends: 1079 [2023-11-19 07:49:56,808 INFO L226 Difference]: Without dead ends: 898 [2023-11-19 07:49:56,812 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 608 GetRequests, 524 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2003 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1771, Invalid=5539, Unknown=0, NotChecked=0, Total=7310 [2023-11-19 07:49:56,813 INFO L413 NwaCegarLoop]: 263 mSDtfsCounter, 1508 mSDsluCounter, 1617 mSDsCounter, 0 mSdLazyCounter, 2635 mSolverCounterSat, 420 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1508 SdHoareTripleChecker+Valid, 1880 SdHoareTripleChecker+Invalid, 3055 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 420 IncrementalHoareTripleChecker+Valid, 2635 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-11-19 07:49:56,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1508 Valid, 1880 Invalid, 3055 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [420 Valid, 2635 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-11-19 07:49:56,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 898 states. [2023-11-19 07:49:56,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 898 to 573. [2023-11-19 07:49:56,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 573 states, 444 states have (on average 1.3513513513513513) internal successors, (600), 446 states have internal predecessors, (600), 102 states have call successors, (102), 26 states have call predecessors, (102), 26 states have return successors, (102), 100 states have call predecessors, (102), 102 states have call successors, (102) [2023-11-19 07:49:56,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 804 transitions. [2023-11-19 07:49:56,964 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 804 transitions. Word has length 271 [2023-11-19 07:49:56,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:49:56,965 INFO L495 AbstractCegarLoop]: Abstraction has 573 states and 804 transitions. [2023-11-19 07:49:56,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 4.925925925925926) internal successors, (133), 26 states have internal predecessors, (133), 7 states have call successors, (67), 4 states have call predecessors, (67), 9 states have return successors, (68), 7 states have call predecessors, (68), 7 states have call successors, (68) [2023-11-19 07:49:56,966 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 804 transitions. [2023-11-19 07:49:56,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2023-11-19 07:49:56,969 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:49:56,969 INFO L195 NwaCegarLoop]: trace histogram [40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:49:56,996 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09761d8f-bf23-4945-8d14-45ca8ed823a2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-19 07:49:57,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09761d8f-bf23-4945-8d14-45ca8ed823a2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-19 07:49:57,184 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:49:57,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:49:57,185 INFO L85 PathProgramCache]: Analyzing trace with hash 1876203796, now seen corresponding path program 1 times [2023-11-19 07:49:57,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:49:57,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048486568] [2023-11-19 07:49:57,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:49:57,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:49:57,258 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:49:57,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1382429055] [2023-11-19 07:49:57,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:49:57,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:49:57,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09761d8f-bf23-4945-8d14-45ca8ed823a2/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:49:57,260 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09761d8f-bf23-4945-8d14-45ca8ed823a2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:49:57,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09761d8f-bf23-4945-8d14-45ca8ed823a2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-19 07:49:57,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:49:57,535 INFO L262 TraceCheckSpWp]: Trace formula consists of 639 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-19 07:49:57,543 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:49:58,509 INFO L134 CoverageAnalysis]: Checked inductivity of 3120 backedges. 477 proven. 108 refuted. 0 times theorem prover too weak. 2535 trivial. 0 not checked. [2023-11-19 07:49:58,509 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:49:58,881 INFO L134 CoverageAnalysis]: Checked inductivity of 3120 backedges. 9 proven. 108 refuted. 0 times theorem prover too weak. 3003 trivial. 0 not checked. [2023-11-19 07:49:58,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:49:58,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048486568] [2023-11-19 07:49:58,882 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:49:58,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382429055] [2023-11-19 07:49:58,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382429055] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:49:58,882 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:49:58,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2023-11-19 07:49:58,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351338156] [2023-11-19 07:49:58,883 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:49:58,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-19 07:49:58,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:49:58,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-19 07:49:58,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-11-19 07:49:58,886 INFO L87 Difference]: Start difference. First operand 573 states and 804 transitions. Second operand has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 states have internal predecessors, (135), 4 states have call successors, (80), 3 states have call predecessors, (80), 5 states have return successors, (80), 4 states have call predecessors, (80), 4 states have call successors, (80) [2023-11-19 07:49:59,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:49:59,821 INFO L93 Difference]: Finished difference Result 1307 states and 1837 transitions. [2023-11-19 07:49:59,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-19 07:49:59,822 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 states have internal predecessors, (135), 4 states have call successors, (80), 3 states have call predecessors, (80), 5 states have return successors, (80), 4 states have call predecessors, (80), 4 states have call successors, (80) Word has length 272 [2023-11-19 07:49:59,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:49:59,833 INFO L225 Difference]: With dead ends: 1307 [2023-11-19 07:49:59,834 INFO L226 Difference]: Without dead ends: 737 [2023-11-19 07:49:59,836 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 548 GetRequests, 533 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2023-11-19 07:49:59,836 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 558 mSDsluCounter, 575 mSDsCounter, 0 mSdLazyCounter, 717 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 561 SdHoareTripleChecker+Valid, 721 SdHoareTripleChecker+Invalid, 773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 717 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-19 07:49:59,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [561 Valid, 721 Invalid, 773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 717 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-19 07:49:59,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 737 states. [2023-11-19 07:49:59,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 737 to 721. [2023-11-19 07:49:59,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 721 states, 584 states have (on average 1.3732876712328768) internal successors, (802), 588 states have internal predecessors, (802), 108 states have call successors, (108), 28 states have call predecessors, (108), 28 states have return successors, (108), 104 states have call predecessors, (108), 108 states have call successors, (108) [2023-11-19 07:49:59,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 721 states to 721 states and 1018 transitions. [2023-11-19 07:49:59,930 INFO L78 Accepts]: Start accepts. Automaton has 721 states and 1018 transitions. Word has length 272 [2023-11-19 07:49:59,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:49:59,931 INFO L495 AbstractCegarLoop]: Abstraction has 721 states and 1018 transitions. [2023-11-19 07:49:59,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 states have internal predecessors, (135), 4 states have call successors, (80), 3 states have call predecessors, (80), 5 states have return successors, (80), 4 states have call predecessors, (80), 4 states have call successors, (80) [2023-11-19 07:49:59,932 INFO L276 IsEmpty]: Start isEmpty. Operand 721 states and 1018 transitions. [2023-11-19 07:49:59,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2023-11-19 07:49:59,934 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:49:59,934 INFO L195 NwaCegarLoop]: trace histogram [40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:49:59,956 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09761d8f-bf23-4945-8d14-45ca8ed823a2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-19 07:50:00,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09761d8f-bf23-4945-8d14-45ca8ed823a2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:00,156 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:50:00,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:00,157 INFO L85 PathProgramCache]: Analyzing trace with hash 2016752406, now seen corresponding path program 1 times [2023-11-19 07:50:00,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:00,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962413806] [2023-11-19 07:50:00,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:00,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:00,198 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:50:00,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [740337915] [2023-11-19 07:50:00,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:00,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:00,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09761d8f-bf23-4945-8d14-45ca8ed823a2/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:50:00,200 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09761d8f-bf23-4945-8d14-45ca8ed823a2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:50:00,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09761d8f-bf23-4945-8d14-45ca8ed823a2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-19 07:50:00,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:00,512 INFO L262 TraceCheckSpWp]: Trace formula consists of 638 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 07:50:00,518 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:50:00,838 INFO L134 CoverageAnalysis]: Checked inductivity of 3120 backedges. 1219 proven. 87 refuted. 0 times theorem prover too weak. 1814 trivial. 0 not checked. [2023-11-19 07:50:00,839 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:50:01,128 INFO L134 CoverageAnalysis]: Checked inductivity of 3120 backedges. 30 proven. 87 refuted. 0 times theorem prover too weak. 3003 trivial. 0 not checked. [2023-11-19 07:50:01,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:01,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962413806] [2023-11-19 07:50:01,129 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:50:01,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740337915] [2023-11-19 07:50:01,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740337915] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:50:01,129 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:50:01,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2023-11-19 07:50:01,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292670518] [2023-11-19 07:50:01,130 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:50:01,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 07:50:01,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:01,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 07:50:01,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:50:01,132 INFO L87 Difference]: Start difference. First operand 721 states and 1018 transitions. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 2 states have call successors, (69), 2 states have call predecessors, (69), 4 states have return successors, (70), 2 states have call predecessors, (70), 2 states have call successors, (70) [2023-11-19 07:50:01,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:50:01,815 INFO L93 Difference]: Finished difference Result 2229 states and 3112 transitions. [2023-11-19 07:50:01,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-19 07:50:01,816 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 2 states have call successors, (69), 2 states have call predecessors, (69), 4 states have return successors, (70), 2 states have call predecessors, (70), 2 states have call successors, (70) Word has length 272 [2023-11-19 07:50:01,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:50:01,828 INFO L225 Difference]: With dead ends: 2229 [2023-11-19 07:50:01,828 INFO L226 Difference]: Without dead ends: 1511 [2023-11-19 07:50:01,833 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 554 GetRequests, 535 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2023-11-19 07:50:01,834 INFO L413 NwaCegarLoop]: 178 mSDtfsCounter, 359 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 624 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 07:50:01,835 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [370 Valid, 624 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 07:50:01,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1511 states. [2023-11-19 07:50:02,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1511 to 1441. [2023-11-19 07:50:02,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1441 states, 1172 states have (on average 1.3668941979522184) internal successors, (1602), 1180 states have internal predecessors, (1602), 208 states have call successors, (208), 60 states have call predecessors, (208), 60 states have return successors, (208), 200 states have call predecessors, (208), 208 states have call successors, (208) [2023-11-19 07:50:02,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1441 states to 1441 states and 2018 transitions. [2023-11-19 07:50:02,074 INFO L78 Accepts]: Start accepts. Automaton has 1441 states and 2018 transitions. Word has length 272 [2023-11-19 07:50:02,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:50:02,075 INFO L495 AbstractCegarLoop]: Abstraction has 1441 states and 2018 transitions. [2023-11-19 07:50:02,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 2 states have call successors, (69), 2 states have call predecessors, (69), 4 states have return successors, (70), 2 states have call predecessors, (70), 2 states have call successors, (70) [2023-11-19 07:50:02,075 INFO L276 IsEmpty]: Start isEmpty. Operand 1441 states and 2018 transitions. [2023-11-19 07:50:02,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2023-11-19 07:50:02,078 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:50:02,078 INFO L195 NwaCegarLoop]: trace histogram [40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:50:02,101 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09761d8f-bf23-4945-8d14-45ca8ed823a2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-19 07:50:02,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09761d8f-bf23-4945-8d14-45ca8ed823a2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:02,297 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:50:02,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:02,298 INFO L85 PathProgramCache]: Analyzing trace with hash 428404504, now seen corresponding path program 1 times [2023-11-19 07:50:02,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:02,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737600083] [2023-11-19 07:50:02,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:02,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:02,358 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:50:02,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1563043260] [2023-11-19 07:50:02,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:02,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:02,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09761d8f-bf23-4945-8d14-45ca8ed823a2/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:50:02,382 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09761d8f-bf23-4945-8d14-45ca8ed823a2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:50:02,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09761d8f-bf23-4945-8d14-45ca8ed823a2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-19 07:50:02,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:02,638 INFO L262 TraceCheckSpWp]: Trace formula consists of 635 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-19 07:50:02,644 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:50:03,117 INFO L134 CoverageAnalysis]: Checked inductivity of 3120 backedges. 1985 proven. 87 refuted. 0 times theorem prover too weak. 1048 trivial. 0 not checked. [2023-11-19 07:50:03,117 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:50:03,825 INFO L134 CoverageAnalysis]: Checked inductivity of 3120 backedges. 246 proven. 96 refuted. 0 times theorem prover too weak. 2778 trivial. 0 not checked. [2023-11-19 07:50:03,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:03,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737600083] [2023-11-19 07:50:03,825 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:50:03,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563043260] [2023-11-19 07:50:03,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563043260] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:50:03,825 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:50:03,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2023-11-19 07:50:03,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475198682] [2023-11-19 07:50:03,826 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:50:03,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-19 07:50:03,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:03,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-19 07:50:03,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2023-11-19 07:50:03,828 INFO L87 Difference]: Start difference. First operand 1441 states and 2018 transitions. Second operand has 22 states, 21 states have (on average 6.190476190476191) internal successors, (130), 20 states have internal predecessors, (130), 7 states have call successors, (61), 4 states have call predecessors, (61), 9 states have return successors, (62), 7 states have call predecessors, (62), 7 states have call successors, (62) [2023-11-19 07:50:06,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:50:06,272 INFO L93 Difference]: Finished difference Result 4485 states and 6184 transitions. [2023-11-19 07:50:06,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-11-19 07:50:06,273 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 6.190476190476191) internal successors, (130), 20 states have internal predecessors, (130), 7 states have call successors, (61), 4 states have call predecessors, (61), 9 states have return successors, (62), 7 states have call predecessors, (62), 7 states have call successors, (62) Word has length 272 [2023-11-19 07:50:06,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:50:06,291 INFO L225 Difference]: With dead ends: 4485 [2023-11-19 07:50:06,292 INFO L226 Difference]: Without dead ends: 3047 [2023-11-19 07:50:06,297 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 580 GetRequests, 528 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 678 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=822, Invalid=2040, Unknown=0, NotChecked=0, Total=2862 [2023-11-19 07:50:06,297 INFO L413 NwaCegarLoop]: 229 mSDtfsCounter, 593 mSDsluCounter, 883 mSDsCounter, 0 mSdLazyCounter, 1305 mSolverCounterSat, 247 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 593 SdHoareTripleChecker+Valid, 1112 SdHoareTripleChecker+Invalid, 1552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 247 IncrementalHoareTripleChecker+Valid, 1305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-19 07:50:06,298 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [593 Valid, 1112 Invalid, 1552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [247 Valid, 1305 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-19 07:50:06,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3047 states. [2023-11-19 07:50:06,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3047 to 983. [2023-11-19 07:50:06,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 983 states, 752 states have (on average 1.2965425531914894) internal successors, (975), 754 states have internal predecessors, (975), 166 states have call successors, (166), 64 states have call predecessors, (166), 64 states have return successors, (166), 164 states have call predecessors, (166), 166 states have call successors, (166) [2023-11-19 07:50:06,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 983 states to 983 states and 1307 transitions. [2023-11-19 07:50:06,571 INFO L78 Accepts]: Start accepts. Automaton has 983 states and 1307 transitions. Word has length 272 [2023-11-19 07:50:06,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:50:06,571 INFO L495 AbstractCegarLoop]: Abstraction has 983 states and 1307 transitions. [2023-11-19 07:50:06,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 6.190476190476191) internal successors, (130), 20 states have internal predecessors, (130), 7 states have call successors, (61), 4 states have call predecessors, (61), 9 states have return successors, (62), 7 states have call predecessors, (62), 7 states have call successors, (62) [2023-11-19 07:50:06,572 INFO L276 IsEmpty]: Start isEmpty. Operand 983 states and 1307 transitions. [2023-11-19 07:50:06,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2023-11-19 07:50:06,574 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:50:06,575 INFO L195 NwaCegarLoop]: trace histogram [40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:50:06,604 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09761d8f-bf23-4945-8d14-45ca8ed823a2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-19 07:50:06,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09761d8f-bf23-4945-8d14-45ca8ed823a2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-19 07:50:06,788 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:50:06,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:06,789 INFO L85 PathProgramCache]: Analyzing trace with hash -1304037715, now seen corresponding path program 1 times [2023-11-19 07:50:06,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:06,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425846632] [2023-11-19 07:50:06,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:06,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:06,828 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:50:06,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1244974994] [2023-11-19 07:50:06,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:06,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:06,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09761d8f-bf23-4945-8d14-45ca8ed823a2/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:50:06,830 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09761d8f-bf23-4945-8d14-45ca8ed823a2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:50:06,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09761d8f-bf23-4945-8d14-45ca8ed823a2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-19 07:50:07,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:07,090 INFO L262 TraceCheckSpWp]: Trace formula consists of 633 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:50:07,096 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:50:07,177 INFO L134 CoverageAnalysis]: Checked inductivity of 3120 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3120 trivial. 0 not checked. [2023-11-19 07:50:07,177 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:50:07,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:07,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425846632] [2023-11-19 07:50:07,178 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:50:07,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244974994] [2023-11-19 07:50:07,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244974994] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:50:07,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:50:07,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:50:07,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688602199] [2023-11-19 07:50:07,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:50:07,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:50:07,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:07,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:50:07,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:50:07,180 INFO L87 Difference]: Start difference. First operand 983 states and 1307 transitions. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 1 states have call successors, (40), 1 states have call predecessors, (40), 1 states have return successors, (40), 1 states have call predecessors, (40), 1 states have call successors, (40) [2023-11-19 07:50:07,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:50:07,631 INFO L93 Difference]: Finished difference Result 2159 states and 2910 transitions. [2023-11-19 07:50:07,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:50:07,633 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 1 states have call successors, (40), 1 states have call predecessors, (40), 1 states have return successors, (40), 1 states have call predecessors, (40), 1 states have call successors, (40) Word has length 273 [2023-11-19 07:50:07,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:50:07,640 INFO L225 Difference]: With dead ends: 2159 [2023-11-19 07:50:07,641 INFO L226 Difference]: Without dead ends: 1179 [2023-11-19 07:50:07,643 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:50:07,644 INFO L413 NwaCegarLoop]: 230 mSDtfsCounter, 234 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 07:50:07,644 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [234 Valid, 533 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 07:50:07,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1179 states. [2023-11-19 07:50:07,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1179 to 995. [2023-11-19 07:50:07,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 995 states, 764 states have (on average 1.2918848167539267) internal successors, (987), 766 states have internal predecessors, (987), 166 states have call successors, (166), 64 states have call predecessors, (166), 64 states have return successors, (166), 164 states have call predecessors, (166), 166 states have call successors, (166) [2023-11-19 07:50:07,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 995 states to 995 states and 1319 transitions. [2023-11-19 07:50:07,862 INFO L78 Accepts]: Start accepts. Automaton has 995 states and 1319 transitions. Word has length 273 [2023-11-19 07:50:07,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:50:07,863 INFO L495 AbstractCegarLoop]: Abstraction has 995 states and 1319 transitions. [2023-11-19 07:50:07,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 1 states have call successors, (40), 1 states have call predecessors, (40), 1 states have return successors, (40), 1 states have call predecessors, (40), 1 states have call successors, (40) [2023-11-19 07:50:07,863 INFO L276 IsEmpty]: Start isEmpty. Operand 995 states and 1319 transitions. [2023-11-19 07:50:07,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2023-11-19 07:50:07,866 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:50:07,866 INFO L195 NwaCegarLoop]: trace histogram [40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:50:07,893 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09761d8f-bf23-4945-8d14-45ca8ed823a2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-19 07:50:08,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09761d8f-bf23-4945-8d14-45ca8ed823a2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:08,080 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:50:08,080 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:08,081 INFO L85 PathProgramCache]: Analyzing trace with hash 1185491247, now seen corresponding path program 1 times [2023-11-19 07:50:08,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:08,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726411410] [2023-11-19 07:50:08,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:08,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:08,120 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:50:08,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [373147223] [2023-11-19 07:50:08,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:08,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:08,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09761d8f-bf23-4945-8d14-45ca8ed823a2/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:50:08,126 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09761d8f-bf23-4945-8d14-45ca8ed823a2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:50:08,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09761d8f-bf23-4945-8d14-45ca8ed823a2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-19 07:50:08,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:08,474 INFO L262 TraceCheckSpWp]: Trace formula consists of 631 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-19 07:50:08,479 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:50:09,606 INFO L134 CoverageAnalysis]: Checked inductivity of 3120 backedges. 515 proven. 210 refuted. 0 times theorem prover too weak. 2395 trivial. 0 not checked. [2023-11-19 07:50:09,606 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:50:10,582 INFO L134 CoverageAnalysis]: Checked inductivity of 3120 backedges. 9 proven. 108 refuted. 0 times theorem prover too weak. 3003 trivial. 0 not checked. [2023-11-19 07:50:10,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:10,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726411410] [2023-11-19 07:50:10,583 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:50:10,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373147223] [2023-11-19 07:50:10,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373147223] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:50:10,583 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:50:10,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2023-11-19 07:50:10,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484504111] [2023-11-19 07:50:10,584 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:50:10,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-19 07:50:10,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:10,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-19 07:50:10,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2023-11-19 07:50:10,587 INFO L87 Difference]: Start difference. First operand 995 states and 1319 transitions. Second operand has 16 states, 16 states have (on average 8.5) internal successors, (136), 15 states have internal predecessors, (136), 4 states have call successors, (76), 3 states have call predecessors, (76), 5 states have return successors, (77), 4 states have call predecessors, (77), 4 states have call successors, (77) [2023-11-19 07:50:12,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:50:12,266 INFO L93 Difference]: Finished difference Result 2899 states and 3895 transitions. [2023-11-19 07:50:12,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-19 07:50:12,267 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 8.5) internal successors, (136), 15 states have internal predecessors, (136), 4 states have call successors, (76), 3 states have call predecessors, (76), 5 states have return successors, (77), 4 states have call predecessors, (77), 4 states have call successors, (77) Word has length 273 [2023-11-19 07:50:12,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:50:12,279 INFO L225 Difference]: With dead ends: 2899 [2023-11-19 07:50:12,279 INFO L226 Difference]: Without dead ends: 1907 [2023-11-19 07:50:12,282 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 560 GetRequests, 531 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=272, Invalid=598, Unknown=0, NotChecked=0, Total=870 [2023-11-19 07:50:12,283 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 1283 mSDsluCounter, 883 mSDsCounter, 0 mSdLazyCounter, 826 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1286 SdHoareTripleChecker+Valid, 1081 SdHoareTripleChecker+Invalid, 950 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 826 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-19 07:50:12,284 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1286 Valid, 1081 Invalid, 950 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 826 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-19 07:50:12,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1907 states. [2023-11-19 07:50:12,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1907 to 515. [2023-11-19 07:50:12,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 400 states have (on average 1.305) internal successors, (522), 400 states have internal predecessors, (522), 80 states have call successors, (80), 34 states have call predecessors, (80), 34 states have return successors, (80), 80 states have call predecessors, (80), 80 states have call successors, (80) [2023-11-19 07:50:12,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 682 transitions. [2023-11-19 07:50:12,512 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 682 transitions. Word has length 273 [2023-11-19 07:50:12,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:50:12,513 INFO L495 AbstractCegarLoop]: Abstraction has 515 states and 682 transitions. [2023-11-19 07:50:12,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 8.5) internal successors, (136), 15 states have internal predecessors, (136), 4 states have call successors, (76), 3 states have call predecessors, (76), 5 states have return successors, (77), 4 states have call predecessors, (77), 4 states have call successors, (77) [2023-11-19 07:50:12,514 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 682 transitions. [2023-11-19 07:50:12,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2023-11-19 07:50:12,516 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:50:12,517 INFO L195 NwaCegarLoop]: trace histogram [40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:50:12,529 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09761d8f-bf23-4945-8d14-45ca8ed823a2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-19 07:50:12,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09761d8f-bf23-4945-8d14-45ca8ed823a2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:12,724 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:50:12,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:12,725 INFO L85 PathProgramCache]: Analyzing trace with hash 1208123501, now seen corresponding path program 1 times [2023-11-19 07:50:12,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:12,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050027041] [2023-11-19 07:50:12,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:12,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:12,780 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:50:12,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [906720067] [2023-11-19 07:50:12,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:12,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:12,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09761d8f-bf23-4945-8d14-45ca8ed823a2/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:50:12,793 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09761d8f-bf23-4945-8d14-45ca8ed823a2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:50:12,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09761d8f-bf23-4945-8d14-45ca8ed823a2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-19 07:50:13,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:13,157 INFO L262 TraceCheckSpWp]: Trace formula consists of 631 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-19 07:50:13,164 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:50:14,629 INFO L134 CoverageAnalysis]: Checked inductivity of 3120 backedges. 515 proven. 210 refuted. 0 times theorem prover too weak. 2395 trivial. 0 not checked. [2023-11-19 07:50:14,630 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:50:15,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:15,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050027041] [2023-11-19 07:50:15,690 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:50:15,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906720067] [2023-11-19 07:50:15,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906720067] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:50:15,691 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:50:15,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2023-11-19 07:50:15,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399572737] [2023-11-19 07:50:15,695 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-19 07:50:15,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-19 07:50:15,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:15,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-19 07:50:15,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-11-19 07:50:15,697 INFO L87 Difference]: Start difference. First operand 515 states and 682 transitions. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 8 states have internal predecessors, (85), 3 states have call successors, (40), 3 states have call predecessors, (40), 4 states have return successors, (40), 3 states have call predecessors, (40), 3 states have call successors, (40) [2023-11-19 07:50:16,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:50:16,501 INFO L93 Difference]: Finished difference Result 1165 states and 1538 transitions. [2023-11-19 07:50:16,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-19 07:50:16,502 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 8 states have internal predecessors, (85), 3 states have call successors, (40), 3 states have call predecessors, (40), 4 states have return successors, (40), 3 states have call predecessors, (40), 3 states have call successors, (40) Word has length 273 [2023-11-19 07:50:16,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:50:16,507 INFO L225 Difference]: With dead ends: 1165 [2023-11-19 07:50:16,507 INFO L226 Difference]: Without dead ends: 653 [2023-11-19 07:50:16,510 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 309 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=128, Invalid=292, Unknown=0, NotChecked=0, Total=420 [2023-11-19 07:50:16,511 INFO L413 NwaCegarLoop]: 147 mSDtfsCounter, 301 mSDsluCounter, 525 mSDsCounter, 0 mSdLazyCounter, 639 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 672 SdHoareTripleChecker+Invalid, 657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 639 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 07:50:16,511 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [304 Valid, 672 Invalid, 657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 639 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 07:50:16,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 653 states. [2023-11-19 07:50:16,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 653 to 439. [2023-11-19 07:50:16,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 324 states have (on average 1.2438271604938271) internal successors, (403), 324 states have internal predecessors, (403), 80 states have call successors, (80), 34 states have call predecessors, (80), 34 states have return successors, (80), 80 states have call predecessors, (80), 80 states have call successors, (80) [2023-11-19 07:50:16,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 563 transitions. [2023-11-19 07:50:16,669 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 563 transitions. Word has length 273 [2023-11-19 07:50:16,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:50:16,670 INFO L495 AbstractCegarLoop]: Abstraction has 439 states and 563 transitions. [2023-11-19 07:50:16,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 8 states have internal predecessors, (85), 3 states have call successors, (40), 3 states have call predecessors, (40), 4 states have return successors, (40), 3 states have call predecessors, (40), 3 states have call successors, (40) [2023-11-19 07:50:16,670 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 563 transitions. [2023-11-19 07:50:16,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2023-11-19 07:50:16,672 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:50:16,673 INFO L195 NwaCegarLoop]: trace histogram [40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:50:16,688 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09761d8f-bf23-4945-8d14-45ca8ed823a2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-19 07:50:16,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09761d8f-bf23-4945-8d14-45ca8ed823a2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-19 07:50:16,889 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:50:16,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:16,889 INFO L85 PathProgramCache]: Analyzing trace with hash -1078164772, now seen corresponding path program 1 times [2023-11-19 07:50:16,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:16,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980324708] [2023-11-19 07:50:16,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:16,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:16,934 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:50:16,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1626505919] [2023-11-19 07:50:16,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:16,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:16,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09761d8f-bf23-4945-8d14-45ca8ed823a2/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:50:16,936 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09761d8f-bf23-4945-8d14-45ca8ed823a2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:50:16,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09761d8f-bf23-4945-8d14-45ca8ed823a2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-19 07:50:17,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:17,278 INFO L262 TraceCheckSpWp]: Trace formula consists of 634 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-19 07:50:17,285 INFO L285 TraceCheckSpWp]: Computing forward predicates...