./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-50_file-81.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed166edc-9157-4a76-ae9a-bddf0fa767ca/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed166edc-9157-4a76-ae9a-bddf0fa767ca/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed166edc-9157-4a76-ae9a-bddf0fa767ca/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed166edc-9157-4a76-ae9a-bddf0fa767ca/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-50_file-81.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed166edc-9157-4a76-ae9a-bddf0fa767ca/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed166edc-9157-4a76-ae9a-bddf0fa767ca/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 47dd68ea39604b487f233f68e029f640f8a21785e687328515d4ba55c65777c4 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:00:39,229 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:00:39,332 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed166edc-9157-4a76-ae9a-bddf0fa767ca/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 22:00:39,341 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:00:39,342 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:00:39,383 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:00:39,384 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:00:39,385 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:00:39,386 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:00:39,391 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:00:39,392 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:00:39,393 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:00:39,393 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:00:39,395 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:00:39,396 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 22:00:39,396 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:00:39,397 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:00:39,397 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:00:39,398 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:00:39,398 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 22:00:39,398 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:00:39,399 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 22:00:39,400 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:00:39,401 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 22:00:39,402 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:00:39,402 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:00:39,403 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:00:39,403 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:00:39,404 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:00:39,404 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:00:39,405 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:00:39,406 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 22:00:39,406 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:00:39,406 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:00:39,406 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:00:39,407 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 22:00:39,407 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:00:39,407 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:00:39,407 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:00:39,408 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_ed166edc-9157-4a76-ae9a-bddf0fa767ca/bin/uautomizer-verify-WvqO1wxjHP/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed166edc-9157-4a76-ae9a-bddf0fa767ca/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 47dd68ea39604b487f233f68e029f640f8a21785e687328515d4ba55c65777c4 [2023-11-06 22:00:39,743 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:00:39,778 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:00:39,780 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:00:39,782 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:00:39,783 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:00:39,784 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed166edc-9157-4a76-ae9a-bddf0fa767ca/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-50_file-81.i [2023-11-06 22:00:42,884 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:00:43,117 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:00:43,118 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed166edc-9157-4a76-ae9a-bddf0fa767ca/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-50_file-81.i [2023-11-06 22:00:43,129 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed166edc-9157-4a76-ae9a-bddf0fa767ca/bin/uautomizer-verify-WvqO1wxjHP/data/97c91a547/6fae2513c9be4d40aa9c1cf94053a973/FLAGc43635ca2 [2023-11-06 22:00:43,149 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed166edc-9157-4a76-ae9a-bddf0fa767ca/bin/uautomizer-verify-WvqO1wxjHP/data/97c91a547/6fae2513c9be4d40aa9c1cf94053a973 [2023-11-06 22:00:43,157 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:00:43,159 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:00:43,162 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:00:43,163 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:00:43,169 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:00:43,170 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:00:43" (1/1) ... [2023-11-06 22:00:43,171 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ca29b07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:00:43, skipping insertion in model container [2023-11-06 22:00:43,171 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:00:43" (1/1) ... [2023-11-06 22:00:43,224 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:00:43,418 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_ed166edc-9157-4a76-ae9a-bddf0fa767ca/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-50_file-81.i[915,928] [2023-11-06 22:00:43,509 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:00:43,524 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:00:43,538 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_ed166edc-9157-4a76-ae9a-bddf0fa767ca/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-50_file-81.i[915,928] [2023-11-06 22:00:43,586 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:00:43,610 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:00:43,610 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:00:43 WrapperNode [2023-11-06 22:00:43,612 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:00:43,614 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:00:43,614 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:00:43,619 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:00:43,627 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:00:43" (1/1) ... [2023-11-06 22:00:43,655 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:00:43" (1/1) ... [2023-11-06 22:00:43,721 INFO L138 Inliner]: procedures = 26, calls = 63, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 307 [2023-11-06 22:00:43,722 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:00:43,722 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:00:43,723 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:00:43,723 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:00:43,733 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:00:43" (1/1) ... [2023-11-06 22:00:43,733 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:00:43" (1/1) ... [2023-11-06 22:00:43,738 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:00:43" (1/1) ... [2023-11-06 22:00:43,739 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:00:43" (1/1) ... [2023-11-06 22:00:43,755 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:00:43" (1/1) ... [2023-11-06 22:00:43,760 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:00:43" (1/1) ... [2023-11-06 22:00:43,764 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:00:43" (1/1) ... [2023-11-06 22:00:43,768 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:00:43" (1/1) ... [2023-11-06 22:00:43,775 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:00:43,776 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:00:43,777 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:00:43,777 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:00:43,778 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:00:43" (1/1) ... [2023-11-06 22:00:43,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:00:43,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed166edc-9157-4a76-ae9a-bddf0fa767ca/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:00:43,821 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed166edc-9157-4a76-ae9a-bddf0fa767ca/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:00:43,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed166edc-9157-4a76-ae9a-bddf0fa767ca/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:00:43,863 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:00:43,864 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-06 22:00:43,864 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-06 22:00:43,864 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:00:43,865 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:00:43,865 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:00:44,015 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:00:44,017 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:00:44,700 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:00:44,709 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:00:44,709 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-06 22:00:44,712 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:00:44 BoogieIcfgContainer [2023-11-06 22:00:44,712 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:00:44,715 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:00:44,715 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:00:44,735 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:00:44,736 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:00:43" (1/3) ... [2023-11-06 22:00:44,736 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7702cb9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:00:44, skipping insertion in model container [2023-11-06 22:00:44,737 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:00:43" (2/3) ... [2023-11-06 22:00:44,737 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7702cb9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:00:44, skipping insertion in model container [2023-11-06 22:00:44,737 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:00:44" (3/3) ... [2023-11-06 22:00:44,739 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_fillercode_fillercodesize_ps-cn-50_file-81.i [2023-11-06 22:00:44,763 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:00:44,764 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 22:00:44,824 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:00:44,832 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@4c1c227a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:00:44,832 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-06 22:00:44,837 INFO L276 IsEmpty]: Start isEmpty. Operand has 130 states, 77 states have (on average 1.4415584415584415) internal successors, (111), 78 states have internal predecessors, (111), 50 states have call successors, (50), 1 states have call predecessors, (50), 1 states have return successors, (50), 50 states have call predecessors, (50), 50 states have call successors, (50) [2023-11-06 22:00:44,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2023-11-06 22:00:44,861 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:00:44,862 INFO L195 NwaCegarLoop]: trace histogram [50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:00:44,863 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:00:44,868 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:00:44,868 INFO L85 PathProgramCache]: Analyzing trace with hash 1886126924, now seen corresponding path program 1 times [2023-11-06 22:00:44,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:00:44,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302623824] [2023-11-06 22:00:44,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:00:44,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:00:45,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:00:45,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:00:45,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302623824] [2023-11-06 22:00:45,197 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-06 22:00:45,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3146175] [2023-11-06 22:00:45,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:00:45,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:00:45,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed166edc-9157-4a76-ae9a-bddf0fa767ca/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:00:45,202 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed166edc-9157-4a76-ae9a-bddf0fa767ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:00:45,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed166edc-9157-4a76-ae9a-bddf0fa767ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:00:45,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:00:45,563 INFO L262 TraceCheckSpWp]: Trace formula consists of 715 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-06 22:00:45,592 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:00:45,701 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 98 proven. 0 refuted. 0 times theorem prover too weak. 4802 trivial. 0 not checked. [2023-11-06 22:00:45,701 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:00:45,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3146175] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:00:45,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:00:45,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:00:45,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404473877] [2023-11-06 22:00:45,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:00:45,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-06 22:00:45,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:00:45,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-06 22:00:45,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 22:00:45,760 INFO L87 Difference]: Start difference. First operand has 130 states, 77 states have (on average 1.4415584415584415) internal successors, (111), 78 states have internal predecessors, (111), 50 states have call successors, (50), 1 states have call predecessors, (50), 1 states have return successors, (50), 50 states have call predecessors, (50), 50 states have call successors, (50) Second operand has 2 states, 2 states have (on average 30.5) internal successors, (61), 2 states have internal predecessors, (61), 2 states have call successors, (50), 2 states have call predecessors, (50), 1 states have return successors, (50), 1 states have call predecessors, (50), 2 states have call successors, (50) [2023-11-06 22:00:45,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:00:45,843 INFO L93 Difference]: Finished difference Result 253 states and 466 transitions. [2023-11-06 22:00:45,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-06 22:00:45,846 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 30.5) internal successors, (61), 2 states have internal predecessors, (61), 2 states have call successors, (50), 2 states have call predecessors, (50), 1 states have return successors, (50), 1 states have call predecessors, (50), 2 states have call successors, (50) Word has length 306 [2023-11-06 22:00:45,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:00:45,861 INFO L225 Difference]: With dead ends: 253 [2023-11-06 22:00:45,862 INFO L226 Difference]: Without dead ends: 126 [2023-11-06 22:00:45,873 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 305 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 22:00:45,879 INFO L413 NwaCegarLoop]: 204 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, 204 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:00:45,881 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:00:45,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2023-11-06 22:00:45,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2023-11-06 22:00:45,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 74 states have (on average 1.4054054054054055) internal successors, (104), 74 states have internal predecessors, (104), 50 states have call successors, (50), 1 states have call predecessors, (50), 1 states have return successors, (50), 50 states have call predecessors, (50), 50 states have call successors, (50) [2023-11-06 22:00:45,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 204 transitions. [2023-11-06 22:00:45,978 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 204 transitions. Word has length 306 [2023-11-06 22:00:45,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:00:45,979 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 204 transitions. [2023-11-06 22:00:45,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 30.5) internal successors, (61), 2 states have internal predecessors, (61), 2 states have call successors, (50), 2 states have call predecessors, (50), 1 states have return successors, (50), 1 states have call predecessors, (50), 2 states have call successors, (50) [2023-11-06 22:00:45,980 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 204 transitions. [2023-11-06 22:00:45,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2023-11-06 22:00:45,989 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:00:45,990 INFO L195 NwaCegarLoop]: trace histogram [50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:00:46,003 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed166edc-9157-4a76-ae9a-bddf0fa767ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 22:00:46,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed166edc-9157-4a76-ae9a-bddf0fa767ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-06 22:00:46,198 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:00:46,199 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:00:46,199 INFO L85 PathProgramCache]: Analyzing trace with hash -1543542012, now seen corresponding path program 1 times [2023-11-06 22:00:46,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:00:46,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889217921] [2023-11-06 22:00:46,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:00:46,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:00:46,308 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:00:46,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1338725476] [2023-11-06 22:00:46,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:00:46,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:00:46,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed166edc-9157-4a76-ae9a-bddf0fa767ca/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:00:46,311 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed166edc-9157-4a76-ae9a-bddf0fa767ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:00:46,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed166edc-9157-4a76-ae9a-bddf0fa767ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 22:00:46,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:00:46,571 INFO L262 TraceCheckSpWp]: Trace formula consists of 715 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-06 22:00:46,582 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:00:48,162 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 1522 proven. 261 refuted. 0 times theorem prover too weak. 3117 trivial. 0 not checked. [2023-11-06 22:00:48,163 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:00:49,021 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 27 proven. 264 refuted. 0 times theorem prover too weak. 4609 trivial. 0 not checked. [2023-11-06 22:00:49,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:00:49,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889217921] [2023-11-06 22:00:49,022 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:00:49,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338725476] [2023-11-06 22:00:49,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338725476] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:00:49,023 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:00:49,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2023-11-06 22:00:49,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512242998] [2023-11-06 22:00:49,024 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:00:49,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-06 22:00:49,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:00:49,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-06 22:00:49,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2023-11-06 22:00:49,030 INFO L87 Difference]: Start difference. First operand 126 states and 204 transitions. Second operand has 16 states, 16 states have (on average 7.5625) internal successors, (121), 16 states have internal predecessors, (121), 5 states have call successors, (99), 3 states have call predecessors, (99), 7 states have return successors, (100), 4 states have call predecessors, (100), 5 states have call successors, (100) [2023-11-06 22:00:50,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:00:50,442 INFO L93 Difference]: Finished difference Result 348 states and 533 transitions. [2023-11-06 22:00:50,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-06 22:00:50,445 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 7.5625) internal successors, (121), 16 states have internal predecessors, (121), 5 states have call successors, (99), 3 states have call predecessors, (99), 7 states have return successors, (100), 4 states have call predecessors, (100), 5 states have call successors, (100) Word has length 306 [2023-11-06 22:00:50,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:00:50,457 INFO L225 Difference]: With dead ends: 348 [2023-11-06 22:00:50,458 INFO L226 Difference]: Without dead ends: 225 [2023-11-06 22:00:50,460 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 632 GetRequests, 599 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=356, Invalid=834, Unknown=0, NotChecked=0, Total=1190 [2023-11-06 22:00:50,462 INFO L413 NwaCegarLoop]: 171 mSDtfsCounter, 326 mSDsluCounter, 515 mSDsCounter, 0 mSdLazyCounter, 848 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 686 SdHoareTripleChecker+Invalid, 982 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 848 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-06 22:00:50,464 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [329 Valid, 686 Invalid, 982 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 848 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-06 22:00:50,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2023-11-06 22:00:50,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 175. [2023-11-06 22:00:50,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 109 states have (on average 1.3302752293577982) internal successors, (145), 110 states have internal predecessors, (145), 60 states have call successors, (60), 5 states have call predecessors, (60), 5 states have return successors, (60), 59 states have call predecessors, (60), 60 states have call successors, (60) [2023-11-06 22:00:50,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 265 transitions. [2023-11-06 22:00:50,530 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 265 transitions. Word has length 306 [2023-11-06 22:00:50,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:00:50,532 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 265 transitions. [2023-11-06 22:00:50,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.5625) internal successors, (121), 16 states have internal predecessors, (121), 5 states have call successors, (99), 3 states have call predecessors, (99), 7 states have return successors, (100), 4 states have call predecessors, (100), 5 states have call successors, (100) [2023-11-06 22:00:50,533 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 265 transitions. [2023-11-06 22:00:50,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2023-11-06 22:00:50,540 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:00:50,540 INFO L195 NwaCegarLoop]: trace histogram [50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:00:50,555 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed166edc-9157-4a76-ae9a-bddf0fa767ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 22:00:50,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed166edc-9157-4a76-ae9a-bddf0fa767ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-06 22:00:50,748 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:00:50,748 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:00:50,749 INFO L85 PathProgramCache]: Analyzing trace with hash 994452571, now seen corresponding path program 1 times [2023-11-06 22:00:50,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:00:50,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045647690] [2023-11-06 22:00:50,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:00:50,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:00:50,827 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:00:50,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [244247261] [2023-11-06 22:00:50,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:00:50,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:00:50,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed166edc-9157-4a76-ae9a-bddf0fa767ca/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:00:50,850 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed166edc-9157-4a76-ae9a-bddf0fa767ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:00:50,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed166edc-9157-4a76-ae9a-bddf0fa767ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 22:00:51,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:00:51,095 INFO L262 TraceCheckSpWp]: Trace formula consists of 717 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 22:00:51,120 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:00:51,171 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4900 trivial. 0 not checked. [2023-11-06 22:00:51,171 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:00:51,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:00:51,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045647690] [2023-11-06 22:00:51,172 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:00:51,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244247261] [2023-11-06 22:00:51,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244247261] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:00:51,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:00:51,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:00:51,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167290359] [2023-11-06 22:00:51,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:00:51,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:00:51,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:00:51,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:00:51,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:00:51,180 INFO L87 Difference]: Start difference. First operand 175 states and 265 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 1 states have call successors, (50), 1 states have call predecessors, (50), 1 states have return successors, (50), 1 states have call predecessors, (50), 1 states have call successors, (50) [2023-11-06 22:00:51,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:00:51,291 INFO L93 Difference]: Finished difference Result 383 states and 567 transitions. [2023-11-06 22:00:51,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:00:51,292 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 1 states have call successors, (50), 1 states have call predecessors, (50), 1 states have return successors, (50), 1 states have call predecessors, (50), 1 states have call successors, (50) Word has length 307 [2023-11-06 22:00:51,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:00:51,298 INFO L225 Difference]: With dead ends: 383 [2023-11-06 22:00:51,299 INFO L226 Difference]: Without dead ends: 211 [2023-11-06 22:00:51,300 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 304 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:00:51,303 INFO L413 NwaCegarLoop]: 204 mSDtfsCounter, 62 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 556 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:00:51,309 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 556 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:00:51,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2023-11-06 22:00:51,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 208. [2023-11-06 22:00:51,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 135 states have (on average 1.2740740740740741) internal successors, (172), 137 states have internal predecessors, (172), 64 states have call successors, (64), 8 states have call predecessors, (64), 8 states have return successors, (64), 62 states have call predecessors, (64), 64 states have call successors, (64) [2023-11-06 22:00:51,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 300 transitions. [2023-11-06 22:00:51,365 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 300 transitions. Word has length 307 [2023-11-06 22:00:51,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:00:51,367 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 300 transitions. [2023-11-06 22:00:51,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 1 states have call successors, (50), 1 states have call predecessors, (50), 1 states have return successors, (50), 1 states have call predecessors, (50), 1 states have call successors, (50) [2023-11-06 22:00:51,368 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 300 transitions. [2023-11-06 22:00:51,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2023-11-06 22:00:51,375 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:00:51,375 INFO L195 NwaCegarLoop]: trace histogram [50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:00:51,387 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed166edc-9157-4a76-ae9a-bddf0fa767ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 22:00:51,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed166edc-9157-4a76-ae9a-bddf0fa767ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:00:51,583 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:00:51,583 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:00:51,584 INFO L85 PathProgramCache]: Analyzing trace with hash 601425561, now seen corresponding path program 1 times [2023-11-06 22:00:51,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:00:51,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018297927] [2023-11-06 22:00:51,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:00:51,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:00:51,646 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:00:51,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [934084117] [2023-11-06 22:00:51,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:00:51,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:00:51,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed166edc-9157-4a76-ae9a-bddf0fa767ca/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:00:51,648 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed166edc-9157-4a76-ae9a-bddf0fa767ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:00:51,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed166edc-9157-4a76-ae9a-bddf0fa767ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 22:00:51,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:00:51,881 INFO L262 TraceCheckSpWp]: Trace formula consists of 716 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 22:00:51,890 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:00:52,660 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 1479 proven. 39 refuted. 0 times theorem prover too weak. 3382 trivial. 0 not checked. [2023-11-06 22:00:52,661 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:00:53,134 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 249 proven. 42 refuted. 0 times theorem prover too weak. 4609 trivial. 0 not checked. [2023-11-06 22:00:53,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:00:53,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018297927] [2023-11-06 22:00:53,135 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:00:53,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934084117] [2023-11-06 22:00:53,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934084117] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:00:53,135 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:00:53,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 16 [2023-11-06 22:00:53,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415586143] [2023-11-06 22:00:53,136 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:00:53,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-06 22:00:53,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:00:53,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-06 22:00:53,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2023-11-06 22:00:53,141 INFO L87 Difference]: Start difference. First operand 208 states and 300 transitions. Second operand has 16 states, 16 states have (on average 7.25) internal successors, (116), 16 states have internal predecessors, (116), 6 states have call successors, (100), 4 states have call predecessors, (100), 8 states have return successors, (100), 6 states have call predecessors, (100), 6 states have call successors, (100) [2023-11-06 22:00:55,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:00:55,672 INFO L93 Difference]: Finished difference Result 1153 states and 1682 transitions. [2023-11-06 22:00:55,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-06 22:00:55,673 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 7.25) internal successors, (116), 16 states have internal predecessors, (116), 6 states have call successors, (100), 4 states have call predecessors, (100), 8 states have return successors, (100), 6 states have call predecessors, (100), 6 states have call successors, (100) Word has length 307 [2023-11-06 22:00:55,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:00:55,687 INFO L225 Difference]: With dead ends: 1153 [2023-11-06 22:00:55,687 INFO L226 Difference]: Without dead ends: 948 [2023-11-06 22:00:55,689 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 627 GetRequests, 600 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=273, Invalid=539, Unknown=0, NotChecked=0, Total=812 [2023-11-06 22:00:55,695 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 1108 mSDsluCounter, 1138 mSDsCounter, 0 mSdLazyCounter, 1414 mSolverCounterSat, 727 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1192 SdHoareTripleChecker+Valid, 1279 SdHoareTripleChecker+Invalid, 2141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 727 IncrementalHoareTripleChecker+Valid, 1414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:00:55,697 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1192 Valid, 1279 Invalid, 2141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [727 Valid, 1414 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-11-06 22:00:55,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 948 states. [2023-11-06 22:00:55,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 948 to 601. [2023-11-06 22:00:55,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 601 states, 391 states have (on average 1.2710997442455243) internal successors, (497), 398 states have internal predecessors, (497), 183 states have call successors, (183), 26 states have call predecessors, (183), 26 states have return successors, (183), 176 states have call predecessors, (183), 183 states have call successors, (183) [2023-11-06 22:00:55,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 863 transitions. [2023-11-06 22:00:55,886 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 863 transitions. Word has length 307 [2023-11-06 22:00:55,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:00:55,891 INFO L495 AbstractCegarLoop]: Abstraction has 601 states and 863 transitions. [2023-11-06 22:00:55,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.25) internal successors, (116), 16 states have internal predecessors, (116), 6 states have call successors, (100), 4 states have call predecessors, (100), 8 states have return successors, (100), 6 states have call predecessors, (100), 6 states have call successors, (100) [2023-11-06 22:00:55,892 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 863 transitions. [2023-11-06 22:00:55,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2023-11-06 22:00:55,900 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:00:55,900 INFO L195 NwaCegarLoop]: trace histogram [50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:00:55,915 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed166edc-9157-4a76-ae9a-bddf0fa767ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-06 22:00:56,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed166edc-9157-4a76-ae9a-bddf0fa767ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:00:56,109 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:00:56,109 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:00:56,110 INFO L85 PathProgramCache]: Analyzing trace with hash -1204012773, now seen corresponding path program 1 times [2023-11-06 22:00:56,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:00:56,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314279334] [2023-11-06 22:00:56,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:00:56,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:00:56,166 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:00:56,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1696581803] [2023-11-06 22:00:56,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:00:56,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:00:56,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed166edc-9157-4a76-ae9a-bddf0fa767ca/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:00:56,168 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed166edc-9157-4a76-ae9a-bddf0fa767ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:00:56,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed166edc-9157-4a76-ae9a-bddf0fa767ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 22:00:56,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:00:56,453 INFO L262 TraceCheckSpWp]: Trace formula consists of 714 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 22:00:56,462 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:00:57,089 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 1377 proven. 123 refuted. 0 times theorem prover too weak. 3400 trivial. 0 not checked. [2023-11-06 22:00:57,090 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:00:57,514 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 24 proven. 123 refuted. 0 times theorem prover too weak. 4753 trivial. 0 not checked. [2023-11-06 22:00:57,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:00:57,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314279334] [2023-11-06 22:00:57,515 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:00:57,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696581803] [2023-11-06 22:00:57,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696581803] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:00:57,516 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:00:57,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-11-06 22:00:57,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196349027] [2023-11-06 22:00:57,517 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:00:57,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 22:00:57,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:00:57,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 22:00:57,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:00:57,521 INFO L87 Difference]: Start difference. First operand 601 states and 863 transitions. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 3 states have call successors, (91), 2 states have call predecessors, (91), 4 states have return successors, (92), 3 states have call predecessors, (92), 3 states have call successors, (92) [2023-11-06 22:00:58,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:00:58,802 INFO L93 Difference]: Finished difference Result 1460 states and 2088 transitions. [2023-11-06 22:00:58,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-06 22:00:58,803 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 3 states have call successors, (91), 2 states have call predecessors, (91), 4 states have return successors, (92), 3 states have call predecessors, (92), 3 states have call successors, (92) Word has length 307 [2023-11-06 22:00:58,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:00:58,814 INFO L225 Difference]: With dead ends: 1460 [2023-11-06 22:00:58,814 INFO L226 Difference]: Without dead ends: 862 [2023-11-06 22:00:58,817 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 625 GetRequests, 603 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=399, Unknown=0, NotChecked=0, Total=552 [2023-11-06 22:00:58,818 INFO L413 NwaCegarLoop]: 270 mSDtfsCounter, 330 mSDsluCounter, 675 mSDsCounter, 0 mSdLazyCounter, 749 mSolverCounterSat, 227 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 945 SdHoareTripleChecker+Invalid, 976 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 227 IncrementalHoareTripleChecker+Valid, 749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-06 22:00:58,819 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [339 Valid, 945 Invalid, 976 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [227 Valid, 749 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-06 22:00:58,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 862 states. [2023-11-06 22:00:58,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 862 to 663. [2023-11-06 22:00:58,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 663 states, 431 states have (on average 1.2250580046403712) internal successors, (528), 439 states have internal predecessors, (528), 194 states have call successors, (194), 37 states have call predecessors, (194), 37 states have return successors, (194), 186 states have call predecessors, (194), 194 states have call successors, (194) [2023-11-06 22:00:58,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 663 states to 663 states and 916 transitions. [2023-11-06 22:00:58,979 INFO L78 Accepts]: Start accepts. Automaton has 663 states and 916 transitions. Word has length 307 [2023-11-06 22:00:58,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:00:58,980 INFO L495 AbstractCegarLoop]: Abstraction has 663 states and 916 transitions. [2023-11-06 22:00:58,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 3 states have call successors, (91), 2 states have call predecessors, (91), 4 states have return successors, (92), 3 states have call predecessors, (92), 3 states have call successors, (92) [2023-11-06 22:00:58,981 INFO L276 IsEmpty]: Start isEmpty. Operand 663 states and 916 transitions. [2023-11-06 22:00:58,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2023-11-06 22:00:58,988 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:00:58,989 INFO L195 NwaCegarLoop]: trace histogram [50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:00:59,002 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed166edc-9157-4a76-ae9a-bddf0fa767ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 22:00:59,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed166edc-9157-4a76-ae9a-bddf0fa767ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:00:59,197 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:00:59,198 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:00:59,198 INFO L85 PathProgramCache]: Analyzing trace with hash 777310784, now seen corresponding path program 1 times [2023-11-06 22:00:59,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:00:59,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497169962] [2023-11-06 22:00:59,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:00:59,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:00:59,270 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:00:59,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2072189485] [2023-11-06 22:00:59,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:00:59,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:00:59,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed166edc-9157-4a76-ae9a-bddf0fa767ca/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:00:59,272 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed166edc-9157-4a76-ae9a-bddf0fa767ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:00:59,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed166edc-9157-4a76-ae9a-bddf0fa767ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 22:00:59,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:00:59,572 INFO L262 TraceCheckSpWp]: Trace formula consists of 715 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 22:00:59,582 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:01:00,148 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4900 trivial. 0 not checked. [2023-11-06 22:01:00,149 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:01:00,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:01:00,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497169962] [2023-11-06 22:01:00,149 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:01:00,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072189485] [2023-11-06 22:01:00,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072189485] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:01:00,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:01:00,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:01:00,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854320113] [2023-11-06 22:01:00,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:01:00,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:01:00,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:01:00,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:01:00,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:01:00,153 INFO L87 Difference]: Start difference. First operand 663 states and 916 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 3 states have internal predecessors, (61), 1 states have call successors, (50), 1 states have call predecessors, (50), 1 states have return successors, (50), 1 states have call predecessors, (50), 1 states have call successors, (50) [2023-11-06 22:01:00,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:01:00,513 INFO L93 Difference]: Finished difference Result 1288 states and 1788 transitions. [2023-11-06 22:01:00,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:01:00,514 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 3 states have internal predecessors, (61), 1 states have call successors, (50), 1 states have call predecessors, (50), 1 states have return successors, (50), 1 states have call predecessors, (50), 1 states have call successors, (50) Word has length 308 [2023-11-06 22:01:00,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:01:00,521 INFO L225 Difference]: With dead ends: 1288 [2023-11-06 22:01:00,521 INFO L226 Difference]: Without dead ends: 666 [2023-11-06 22:01:00,524 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 305 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:01:00,525 INFO L413 NwaCegarLoop]: 249 mSDtfsCounter, 61 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 581 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:01:00,526 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 581 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 22:01:00,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2023-11-06 22:01:00,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 664. [2023-11-06 22:01:00,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 664 states, 432 states have (on average 1.224537037037037) internal successors, (529), 440 states have internal predecessors, (529), 194 states have call successors, (194), 37 states have call predecessors, (194), 37 states have return successors, (194), 186 states have call predecessors, (194), 194 states have call successors, (194) [2023-11-06 22:01:00,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 917 transitions. [2023-11-06 22:01:00,685 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 917 transitions. Word has length 308 [2023-11-06 22:01:00,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:01:00,686 INFO L495 AbstractCegarLoop]: Abstraction has 664 states and 917 transitions. [2023-11-06 22:01:00,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 3 states have internal predecessors, (61), 1 states have call successors, (50), 1 states have call predecessors, (50), 1 states have return successors, (50), 1 states have call predecessors, (50), 1 states have call successors, (50) [2023-11-06 22:01:00,686 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 917 transitions. [2023-11-06 22:01:00,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2023-11-06 22:01:00,692 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:01:00,692 INFO L195 NwaCegarLoop]: trace histogram [50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:01:00,708 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed166edc-9157-4a76-ae9a-bddf0fa767ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 22:01:00,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed166edc-9157-4a76-ae9a-bddf0fa767ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:01:00,901 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:01:00,901 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:01:00,902 INFO L85 PathProgramCache]: Analyzing trace with hash 1576137805, now seen corresponding path program 1 times [2023-11-06 22:01:00,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:01:00,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540011782] [2023-11-06 22:01:00,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:01:00,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:01:00,956 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:01:00,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [871777326] [2023-11-06 22:01:00,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:01:00,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:01:00,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed166edc-9157-4a76-ae9a-bddf0fa767ca/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:01:00,958 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed166edc-9157-4a76-ae9a-bddf0fa767ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:01:00,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed166edc-9157-4a76-ae9a-bddf0fa767ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 22:01:01,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:01:01,238 INFO L262 TraceCheckSpWp]: Trace formula consists of 723 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-06 22:01:01,245 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:01:01,686 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 2479 proven. 66 refuted. 0 times theorem prover too weak. 2355 trivial. 0 not checked. [2023-11-06 22:01:01,686 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:01:02,200 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4900 trivial. 0 not checked. [2023-11-06 22:01:02,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:01:02,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540011782] [2023-11-06 22:01:02,201 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:01:02,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871777326] [2023-11-06 22:01:02,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871777326] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 22:01:02,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:01:02,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 13 [2023-11-06 22:01:02,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115034220] [2023-11-06 22:01:02,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:01:02,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:01:02,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:01:02,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:01:02,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-11-06 22:01:02,205 INFO L87 Difference]: Start difference. First operand 664 states and 917 transitions. Second operand has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 1 states have call successors, (50), 1 states have call predecessors, (50), 1 states have return successors, (50), 1 states have call predecessors, (50), 1 states have call successors, (50) [2023-11-06 22:01:03,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:01:03,595 INFO L93 Difference]: Finished difference Result 2260 states and 3058 transitions. [2023-11-06 22:01:03,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:01:03,596 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 1 states have call successors, (50), 1 states have call predecessors, (50), 1 states have return successors, (50), 1 states have call predecessors, (50), 1 states have call successors, (50) Word has length 309 [2023-11-06 22:01:03,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:01:03,608 INFO L225 Difference]: With dead ends: 2260 [2023-11-06 22:01:03,609 INFO L226 Difference]: Without dead ends: 1637 [2023-11-06 22:01:03,611 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 620 GetRequests, 607 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2023-11-06 22:01:03,612 INFO L413 NwaCegarLoop]: 256 mSDtfsCounter, 404 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 320 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 404 SdHoareTripleChecker+Valid, 491 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 320 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-06 22:01:03,613 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [404 Valid, 491 Invalid, 464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [320 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-06 22:01:03,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1637 states. [2023-11-06 22:01:03,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1637 to 685. [2023-11-06 22:01:03,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 685 states, 450 states have (on average 1.228888888888889) internal successors, (553), 458 states have internal predecessors, (553), 194 states have call successors, (194), 40 states have call predecessors, (194), 40 states have return successors, (194), 186 states have call predecessors, (194), 194 states have call successors, (194) [2023-11-06 22:01:03,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 685 states to 685 states and 941 transitions. [2023-11-06 22:01:03,895 INFO L78 Accepts]: Start accepts. Automaton has 685 states and 941 transitions. Word has length 309 [2023-11-06 22:01:03,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:01:03,897 INFO L495 AbstractCegarLoop]: Abstraction has 685 states and 941 transitions. [2023-11-06 22:01:03,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 1 states have call successors, (50), 1 states have call predecessors, (50), 1 states have return successors, (50), 1 states have call predecessors, (50), 1 states have call successors, (50) [2023-11-06 22:01:03,898 INFO L276 IsEmpty]: Start isEmpty. Operand 685 states and 941 transitions. [2023-11-06 22:01:03,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2023-11-06 22:01:03,904 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:01:03,904 INFO L195 NwaCegarLoop]: trace histogram [50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:01:03,916 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed166edc-9157-4a76-ae9a-bddf0fa767ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 22:01:04,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed166edc-9157-4a76-ae9a-bddf0fa767ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:01:04,113 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:01:04,113 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:01:04,114 INFO L85 PathProgramCache]: Analyzing trace with hash -549810788, now seen corresponding path program 1 times [2023-11-06 22:01:04,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:01:04,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58301391] [2023-11-06 22:01:04,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:01:04,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:01:04,183 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:01:04,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [397449069] [2023-11-06 22:01:04,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:01:04,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:01:04,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed166edc-9157-4a76-ae9a-bddf0fa767ca/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:01:04,186 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed166edc-9157-4a76-ae9a-bddf0fa767ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:01:04,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed166edc-9157-4a76-ae9a-bddf0fa767ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 22:01:04,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:01:04,591 INFO L262 TraceCheckSpWp]: Trace formula consists of 714 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-06 22:01:04,605 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:01:15,828 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 1417 proven. 399 refuted. 0 times theorem prover too weak. 3084 trivial. 0 not checked. [2023-11-06 22:01:15,829 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:01:27,840 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4900 trivial. 0 not checked. [2023-11-06 22:01:27,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:01:27,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58301391] [2023-11-06 22:01:27,841 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:01:27,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397449069] [2023-11-06 22:01:27,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397449069] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 22:01:27,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:01:27,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [19] total 26 [2023-11-06 22:01:27,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195093415] [2023-11-06 22:01:27,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:01:27,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 22:01:27,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:01:27,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 22:01:27,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=499, Unknown=0, NotChecked=0, Total=650 [2023-11-06 22:01:27,845 INFO L87 Difference]: Start difference. First operand 685 states and 941 transitions. Second operand has 10 states, 10 states have (on average 6.2) internal successors, (62), 10 states have internal predecessors, (62), 1 states have call successors, (50), 1 states have call predecessors, (50), 1 states have return successors, (50), 1 states have call predecessors, (50), 1 states have call successors, (50) [2023-11-06 22:01:29,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:01:29,418 INFO L93 Difference]: Finished difference Result 1520 states and 2079 transitions. [2023-11-06 22:01:29,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-06 22:01:29,420 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.2) internal successors, (62), 10 states have internal predecessors, (62), 1 states have call successors, (50), 1 states have call predecessors, (50), 1 states have return successors, (50), 1 states have call predecessors, (50), 1 states have call successors, (50) Word has length 309 [2023-11-06 22:01:29,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:01:29,427 INFO L225 Difference]: With dead ends: 1520 [2023-11-06 22:01:29,427 INFO L226 Difference]: Without dead ends: 876 [2023-11-06 22:01:29,431 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 627 GetRequests, 593 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=279, Invalid=981, Unknown=0, NotChecked=0, Total=1260 [2023-11-06 22:01:29,432 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 215 mSDsluCounter, 751 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 953 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 22:01:29,433 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [215 Valid, 953 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 22:01:29,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 876 states. [2023-11-06 22:01:29,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 876 to 715. [2023-11-06 22:01:29,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 715 states, 480 states have (on average 1.2333333333333334) internal successors, (592), 488 states have internal predecessors, (592), 194 states have call successors, (194), 40 states have call predecessors, (194), 40 states have return successors, (194), 186 states have call predecessors, (194), 194 states have call successors, (194) [2023-11-06 22:01:29,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 715 states to 715 states and 980 transitions. [2023-11-06 22:01:29,633 INFO L78 Accepts]: Start accepts. Automaton has 715 states and 980 transitions. Word has length 309 [2023-11-06 22:01:29,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:01:29,634 INFO L495 AbstractCegarLoop]: Abstraction has 715 states and 980 transitions. [2023-11-06 22:01:29,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.2) internal successors, (62), 10 states have internal predecessors, (62), 1 states have call successors, (50), 1 states have call predecessors, (50), 1 states have return successors, (50), 1 states have call predecessors, (50), 1 states have call successors, (50) [2023-11-06 22:01:29,634 INFO L276 IsEmpty]: Start isEmpty. Operand 715 states and 980 transitions. [2023-11-06 22:01:29,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2023-11-06 22:01:29,640 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:01:29,641 INFO L195 NwaCegarLoop]: trace histogram [50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:01:29,649 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed166edc-9157-4a76-ae9a-bddf0fa767ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 22:01:29,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed166edc-9157-4a76-ae9a-bddf0fa767ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:01:29,850 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:01:29,850 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:01:29,850 INFO L85 PathProgramCache]: Analyzing trace with hash -291645350, now seen corresponding path program 1 times [2023-11-06 22:01:29,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:01:29,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443755817] [2023-11-06 22:01:29,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:01:29,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:01:29,904 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:01:29,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [619097853] [2023-11-06 22:01:29,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:01:29,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:01:29,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed166edc-9157-4a76-ae9a-bddf0fa767ca/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:01:29,906 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed166edc-9157-4a76-ae9a-bddf0fa767ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:01:29,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed166edc-9157-4a76-ae9a-bddf0fa767ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 22:01:30,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:01:30,167 INFO L262 TraceCheckSpWp]: Trace formula consists of 711 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-06 22:01:30,175 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:01:31,991 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 1522 proven. 261 refuted. 0 times theorem prover too weak. 3117 trivial. 0 not checked. [2023-11-06 22:01:31,992 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:01:32,866 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 4753 trivial. 0 not checked. [2023-11-06 22:01:32,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:01:32,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443755817] [2023-11-06 22:01:32,866 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:01:32,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619097853] [2023-11-06 22:01:32,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619097853] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:01:32,867 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:01:32,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2023-11-06 22:01:32,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128919498] [2023-11-06 22:01:32,867 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:01:32,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-06 22:01:32,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:01:32,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-06 22:01:32,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2023-11-06 22:01:32,871 INFO L87 Difference]: Start difference. First operand 715 states and 980 transitions. Second operand has 18 states, 18 states have (on average 7.111111111111111) internal successors, (128), 18 states have internal predecessors, (128), 5 states have call successors, (100), 4 states have call predecessors, (100), 6 states have return successors, (100), 3 states have call predecessors, (100), 5 states have call successors, (100) [2023-11-06 22:01:35,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:01:35,808 INFO L93 Difference]: Finished difference Result 1680 states and 2328 transitions. [2023-11-06 22:01:35,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-06 22:01:35,809 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 7.111111111111111) internal successors, (128), 18 states have internal predecessors, (128), 5 states have call successors, (100), 4 states have call predecessors, (100), 6 states have return successors, (100), 3 states have call predecessors, (100), 5 states have call successors, (100) Word has length 309 [2023-11-06 22:01:35,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:01:35,818 INFO L225 Difference]: With dead ends: 1680 [2023-11-06 22:01:35,818 INFO L226 Difference]: Without dead ends: 1006 [2023-11-06 22:01:35,822 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 656 GetRequests, 608 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 684 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=610, Invalid=1840, Unknown=0, NotChecked=0, Total=2450 [2023-11-06 22:01:35,825 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 763 mSDsluCounter, 847 mSDsCounter, 0 mSdLazyCounter, 1233 mSolverCounterSat, 566 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 763 SdHoareTripleChecker+Valid, 993 SdHoareTripleChecker+Invalid, 1799 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 566 IncrementalHoareTripleChecker+Valid, 1233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-11-06 22:01:35,825 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [763 Valid, 993 Invalid, 1799 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [566 Valid, 1233 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-11-06 22:01:35,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1006 states. [2023-11-06 22:01:36,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1006 to 685. [2023-11-06 22:01:36,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 685 states, 450 states have (on average 1.2155555555555555) internal successors, (547), 458 states have internal predecessors, (547), 194 states have call successors, (194), 40 states have call predecessors, (194), 40 states have return successors, (194), 186 states have call predecessors, (194), 194 states have call successors, (194) [2023-11-06 22:01:36,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 685 states to 685 states and 935 transitions. [2023-11-06 22:01:36,066 INFO L78 Accepts]: Start accepts. Automaton has 685 states and 935 transitions. Word has length 309 [2023-11-06 22:01:36,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:01:36,067 INFO L495 AbstractCegarLoop]: Abstraction has 685 states and 935 transitions. [2023-11-06 22:01:36,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 7.111111111111111) internal successors, (128), 18 states have internal predecessors, (128), 5 states have call successors, (100), 4 states have call predecessors, (100), 6 states have return successors, (100), 3 states have call predecessors, (100), 5 states have call successors, (100) [2023-11-06 22:01:36,068 INFO L276 IsEmpty]: Start isEmpty. Operand 685 states and 935 transitions. [2023-11-06 22:01:36,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2023-11-06 22:01:36,070 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:01:36,071 INFO L195 NwaCegarLoop]: trace histogram [50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:01:36,079 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed166edc-9157-4a76-ae9a-bddf0fa767ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-06 22:01:36,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed166edc-9157-4a76-ae9a-bddf0fa767ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-06 22:01:36,279 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:01:36,279 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:01:36,279 INFO L85 PathProgramCache]: Analyzing trace with hash -1829674466, now seen corresponding path program 1 times [2023-11-06 22:01:36,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:01:36,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590056887] [2023-11-06 22:01:36,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:01:36,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:01:36,323 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:01:36,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [998031123] [2023-11-06 22:01:36,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:01:36,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:01:36,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed166edc-9157-4a76-ae9a-bddf0fa767ca/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:01:36,325 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed166edc-9157-4a76-ae9a-bddf0fa767ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:01:36,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed166edc-9157-4a76-ae9a-bddf0fa767ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 22:01:36,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:01:36,624 INFO L262 TraceCheckSpWp]: Trace formula consists of 714 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-06 22:01:36,634 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:01:40,683 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 1417 proven. 399 refuted. 0 times theorem prover too weak. 3084 trivial. 0 not checked. [2023-11-06 22:01:40,683 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:01:58,194 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4900 trivial. 0 not checked. [2023-11-06 22:01:58,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:01:58,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590056887] [2023-11-06 22:01:58,194 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:01:58,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998031123] [2023-11-06 22:01:58,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998031123] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 22:01:58,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:01:58,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [19] total 26 [2023-11-06 22:01:58,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89873050] [2023-11-06 22:01:58,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:01:58,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 22:01:58,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:01:58,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 22:01:58,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=499, Unknown=0, NotChecked=0, Total=650 [2023-11-06 22:01:58,198 INFO L87 Difference]: Start difference. First operand 685 states and 935 transitions. Second operand has 10 states, 10 states have (on average 6.2) internal successors, (62), 10 states have internal predecessors, (62), 1 states have call successors, (50), 1 states have call predecessors, (50), 1 states have return successors, (50), 1 states have call predecessors, (50), 1 states have call successors, (50) [2023-11-06 22:02:00,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:02:00,152 INFO L93 Difference]: Finished difference Result 1443 states and 1964 transitions. [2023-11-06 22:02:00,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-06 22:02:00,153 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.2) internal successors, (62), 10 states have internal predecessors, (62), 1 states have call successors, (50), 1 states have call predecessors, (50), 1 states have return successors, (50), 1 states have call predecessors, (50), 1 states have call successors, (50) Word has length 309 [2023-11-06 22:02:00,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:02:00,159 INFO L225 Difference]: With dead ends: 1443 [2023-11-06 22:02:00,159 INFO L226 Difference]: Without dead ends: 799 [2023-11-06 22:02:00,162 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 625 GetRequests, 592 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=269, Invalid=921, Unknown=0, NotChecked=0, Total=1190 [2023-11-06 22:02:00,163 INFO L413 NwaCegarLoop]: 196 mSDtfsCounter, 162 mSDsluCounter, 703 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 899 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 22:02:00,164 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 899 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 22:02:00,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 799 states. [2023-11-06 22:02:00,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 799 to 709. [2023-11-06 22:02:00,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 709 states, 474 states have (on average 1.2172995780590716) internal successors, (577), 482 states have internal predecessors, (577), 194 states have call successors, (194), 40 states have call predecessors, (194), 40 states have return successors, (194), 186 states have call predecessors, (194), 194 states have call successors, (194) [2023-11-06 22:02:00,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 709 states to 709 states and 965 transitions. [2023-11-06 22:02:00,385 INFO L78 Accepts]: Start accepts. Automaton has 709 states and 965 transitions. Word has length 309 [2023-11-06 22:02:00,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:02:00,385 INFO L495 AbstractCegarLoop]: Abstraction has 709 states and 965 transitions. [2023-11-06 22:02:00,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.2) internal successors, (62), 10 states have internal predecessors, (62), 1 states have call successors, (50), 1 states have call predecessors, (50), 1 states have return successors, (50), 1 states have call predecessors, (50), 1 states have call successors, (50) [2023-11-06 22:02:00,386 INFO L276 IsEmpty]: Start isEmpty. Operand 709 states and 965 transitions. [2023-11-06 22:02:00,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2023-11-06 22:02:00,388 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:02:00,389 INFO L195 NwaCegarLoop]: trace histogram [50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:02:00,396 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed166edc-9157-4a76-ae9a-bddf0fa767ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-06 22:02:00,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed166edc-9157-4a76-ae9a-bddf0fa767ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-06 22:02:00,596 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:02:00,596 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:02:00,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1571509028, now seen corresponding path program 1 times [2023-11-06 22:02:00,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:02:00,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969177532] [2023-11-06 22:02:00,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:02:00,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:02:00,634 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:02:00,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [564022525] [2023-11-06 22:02:00,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:02:00,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:02:00,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed166edc-9157-4a76-ae9a-bddf0fa767ca/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:02:00,636 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed166edc-9157-4a76-ae9a-bddf0fa767ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:02:00,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed166edc-9157-4a76-ae9a-bddf0fa767ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-06 22:02:00,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:02:00,920 INFO L262 TraceCheckSpWp]: Trace formula consists of 711 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-06 22:02:00,928 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:02:04,557 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 1417 proven. 399 refuted. 0 times theorem prover too weak. 3084 trivial. 0 not checked. [2023-11-06 22:02:04,558 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:02:12,190 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4900 trivial. 0 not checked. [2023-11-06 22:02:12,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:02:12,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969177532] [2023-11-06 22:02:12,191 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:02:12,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564022525] [2023-11-06 22:02:12,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564022525] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 22:02:12,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:02:12,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [19] total 26 [2023-11-06 22:02:12,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199405718] [2023-11-06 22:02:12,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:02:12,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 22:02:12,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:02:12,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 22:02:12,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=499, Unknown=0, NotChecked=0, Total=650 [2023-11-06 22:02:12,194 INFO L87 Difference]: Start difference. First operand 709 states and 965 transitions. Second operand has 10 states, 10 states have (on average 6.2) internal successors, (62), 10 states have internal predecessors, (62), 1 states have call successors, (50), 1 states have call predecessors, (50), 1 states have return successors, (50), 1 states have call predecessors, (50), 1 states have call successors, (50) [2023-11-06 22:02:14,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:02:14,236 INFO L93 Difference]: Finished difference Result 1467 states and 1991 transitions. [2023-11-06 22:02:14,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-06 22:02:14,237 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.2) internal successors, (62), 10 states have internal predecessors, (62), 1 states have call successors, (50), 1 states have call predecessors, (50), 1 states have return successors, (50), 1 states have call predecessors, (50), 1 states have call successors, (50) Word has length 309 [2023-11-06 22:02:14,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:02:14,244 INFO L225 Difference]: With dead ends: 1467 [2023-11-06 22:02:14,244 INFO L226 Difference]: Without dead ends: 799 [2023-11-06 22:02:14,247 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 625 GetRequests, 592 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=269, Invalid=921, Unknown=0, NotChecked=0, Total=1190 [2023-11-06 22:02:14,248 INFO L413 NwaCegarLoop]: 200 mSDtfsCounter, 182 mSDsluCounter, 550 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 750 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 22:02:14,249 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 750 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 22:02:14,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 799 states. [2023-11-06 22:02:14,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 799 to 709. [2023-11-06 22:02:14,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 709 states, 474 states have (on average 1.2172995780590716) internal successors, (577), 482 states have internal predecessors, (577), 194 states have call successors, (194), 40 states have call predecessors, (194), 40 states have return successors, (194), 186 states have call predecessors, (194), 194 states have call successors, (194) [2023-11-06 22:02:14,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 709 states to 709 states and 965 transitions. [2023-11-06 22:02:14,551 INFO L78 Accepts]: Start accepts. Automaton has 709 states and 965 transitions. Word has length 309 [2023-11-06 22:02:14,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:02:14,552 INFO L495 AbstractCegarLoop]: Abstraction has 709 states and 965 transitions. [2023-11-06 22:02:14,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.2) internal successors, (62), 10 states have internal predecessors, (62), 1 states have call successors, (50), 1 states have call predecessors, (50), 1 states have return successors, (50), 1 states have call predecessors, (50), 1 states have call successors, (50) [2023-11-06 22:02:14,552 INFO L276 IsEmpty]: Start isEmpty. Operand 709 states and 965 transitions. [2023-11-06 22:02:14,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2023-11-06 22:02:14,555 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:02:14,556 INFO L195 NwaCegarLoop]: trace histogram [50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:02:14,579 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed166edc-9157-4a76-ae9a-bddf0fa767ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-06 22:02:14,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed166edc-9157-4a76-ae9a-bddf0fa767ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-06 22:02:14,780 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:02:14,780 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:02:14,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1878486816, now seen corresponding path program 1 times [2023-11-06 22:02:14,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:02:14,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62428147] [2023-11-06 22:02:14,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:02:14,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:02:14,824 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:02:14,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [237773501] [2023-11-06 22:02:14,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:02:14,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:02:14,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed166edc-9157-4a76-ae9a-bddf0fa767ca/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:02:14,826 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed166edc-9157-4a76-ae9a-bddf0fa767ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:02:14,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed166edc-9157-4a76-ae9a-bddf0fa767ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-06 22:02:15,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:02:15,094 INFO L262 TraceCheckSpWp]: Trace formula consists of 713 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-06 22:02:15,102 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:02:27,844 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4900 trivial. 0 not checked. [2023-11-06 22:02:27,844 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:02:27,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:02:27,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62428147] [2023-11-06 22:02:27,845 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:02:27,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237773501] [2023-11-06 22:02:27,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237773501] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:02:27,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:02:27,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-06 22:02:27,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799262564] [2023-11-06 22:02:27,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:02:27,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 22:02:27,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:02:27,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 22:02:27,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2023-11-06 22:02:27,848 INFO L87 Difference]: Start difference. First operand 709 states and 965 transitions. Second operand has 10 states, 10 states have (on average 6.2) internal successors, (62), 10 states have internal predecessors, (62), 1 states have call successors, (50), 1 states have call predecessors, (50), 1 states have return successors, (50), 1 states have call predecessors, (50), 1 states have call successors, (50) [2023-11-06 22:02:28,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:02:28,967 INFO L93 Difference]: Finished difference Result 1563 states and 2102 transitions. [2023-11-06 22:02:28,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-06 22:02:28,968 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.2) internal successors, (62), 10 states have internal predecessors, (62), 1 states have call successors, (50), 1 states have call predecessors, (50), 1 states have return successors, (50), 1 states have call predecessors, (50), 1 states have call successors, (50) Word has length 309 [2023-11-06 22:02:28,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:02:28,975 INFO L225 Difference]: With dead ends: 1563 [2023-11-06 22:02:28,975 INFO L226 Difference]: Without dead ends: 895 [2023-11-06 22:02:28,977 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 300 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2023-11-06 22:02:28,979 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 149 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 641 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 22:02:28,979 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 641 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 22:02:28,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 895 states. [2023-11-06 22:02:29,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 895 to 733. [2023-11-06 22:02:29,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 733 states, 498 states have (on average 1.21285140562249) internal successors, (604), 506 states have internal predecessors, (604), 194 states have call successors, (194), 40 states have call predecessors, (194), 40 states have return successors, (194), 186 states have call predecessors, (194), 194 states have call successors, (194) [2023-11-06 22:02:29,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 733 states to 733 states and 992 transitions. [2023-11-06 22:02:29,240 INFO L78 Accepts]: Start accepts. Automaton has 733 states and 992 transitions. Word has length 309 [2023-11-06 22:02:29,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:02:29,241 INFO L495 AbstractCegarLoop]: Abstraction has 733 states and 992 transitions. [2023-11-06 22:02:29,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.2) internal successors, (62), 10 states have internal predecessors, (62), 1 states have call successors, (50), 1 states have call predecessors, (50), 1 states have return successors, (50), 1 states have call predecessors, (50), 1 states have call successors, (50) [2023-11-06 22:02:29,242 INFO L276 IsEmpty]: Start isEmpty. Operand 733 states and 992 transitions. [2023-11-06 22:02:29,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2023-11-06 22:02:29,244 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:02:29,245 INFO L195 NwaCegarLoop]: trace histogram [50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:02:29,252 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed166edc-9157-4a76-ae9a-bddf0fa767ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-06 22:02:29,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed166edc-9157-4a76-ae9a-bddf0fa767ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:02:29,452 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:02:29,453 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:02:29,453 INFO L85 PathProgramCache]: Analyzing trace with hash 2136652254, now seen corresponding path program 1 times [2023-11-06 22:02:29,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:02:29,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623667775] [2023-11-06 22:02:29,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:02:29,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:02:29,500 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:02:29,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1221514936] [2023-11-06 22:02:29,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:02:29,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:02:29,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed166edc-9157-4a76-ae9a-bddf0fa767ca/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:02:29,502 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed166edc-9157-4a76-ae9a-bddf0fa767ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:02:29,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed166edc-9157-4a76-ae9a-bddf0fa767ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-06 22:02:29,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:02:29,765 INFO L262 TraceCheckSpWp]: Trace formula consists of 710 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-06 22:02:29,774 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:02:39,785 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4900 trivial. 0 not checked. [2023-11-06 22:02:39,785 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:02:39,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:02:39,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623667775] [2023-11-06 22:02:39,785 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:02:39,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221514936] [2023-11-06 22:02:39,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221514936] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:02:39,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:02:39,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-06 22:02:39,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528115860] [2023-11-06 22:02:39,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:02:39,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 22:02:39,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:02:39,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 22:02:39,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2023-11-06 22:02:39,789 INFO L87 Difference]: Start difference. First operand 733 states and 992 transitions. Second operand has 10 states, 10 states have (on average 6.2) internal successors, (62), 10 states have internal predecessors, (62), 1 states have call successors, (50), 1 states have call predecessors, (50), 1 states have return successors, (50), 1 states have call predecessors, (50), 1 states have call successors, (50) [2023-11-06 22:02:40,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:02:40,986 INFO L93 Difference]: Finished difference Result 1587 states and 2123 transitions. [2023-11-06 22:02:40,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-06 22:02:40,987 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.2) internal successors, (62), 10 states have internal predecessors, (62), 1 states have call successors, (50), 1 states have call predecessors, (50), 1 states have return successors, (50), 1 states have call predecessors, (50), 1 states have call successors, (50) Word has length 309 [2023-11-06 22:02:40,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:02:40,996 INFO L225 Difference]: With dead ends: 1587 [2023-11-06 22:02:40,996 INFO L226 Difference]: Without dead ends: 895 [2023-11-06 22:02:40,998 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 300 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2023-11-06 22:02:40,999 INFO L413 NwaCegarLoop]: 220 mSDtfsCounter, 101 mSDsluCounter, 789 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 1009 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-06 22:02:41,000 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 1009 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-06 22:02:41,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 895 states. [2023-11-06 22:02:41,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 895 to 712. [2023-11-06 22:02:41,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 712 states, 477 states have (on average 1.209643605870021) internal successors, (577), 485 states have internal predecessors, (577), 194 states have call successors, (194), 40 states have call predecessors, (194), 40 states have return successors, (194), 186 states have call predecessors, (194), 194 states have call successors, (194) [2023-11-06 22:02:41,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 965 transitions. [2023-11-06 22:02:41,211 INFO L78 Accepts]: Start accepts. Automaton has 712 states and 965 transitions. Word has length 309 [2023-11-06 22:02:41,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:02:41,212 INFO L495 AbstractCegarLoop]: Abstraction has 712 states and 965 transitions. [2023-11-06 22:02:41,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.2) internal successors, (62), 10 states have internal predecessors, (62), 1 states have call successors, (50), 1 states have call predecessors, (50), 1 states have return successors, (50), 1 states have call predecessors, (50), 1 states have call successors, (50) [2023-11-06 22:02:41,213 INFO L276 IsEmpty]: Start isEmpty. Operand 712 states and 965 transitions. [2023-11-06 22:02:41,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2023-11-06 22:02:41,215 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:02:41,216 INFO L195 NwaCegarLoop]: trace histogram [50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:02:41,223 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed166edc-9157-4a76-ae9a-bddf0fa767ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-06 22:02:41,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed166edc-9157-4a76-ae9a-bddf0fa767ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:02:41,423 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:02:41,423 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:02:41,423 INFO L85 PathProgramCache]: Analyzing trace with hash 1454159385, now seen corresponding path program 1 times [2023-11-06 22:02:41,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:02:41,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045059259] [2023-11-06 22:02:41,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:02:41,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:02:41,477 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:02:41,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1266823150] [2023-11-06 22:02:41,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:02:41,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:02:41,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed166edc-9157-4a76-ae9a-bddf0fa767ca/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:02:41,479 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed166edc-9157-4a76-ae9a-bddf0fa767ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:02:41,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed166edc-9157-4a76-ae9a-bddf0fa767ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-06 22:02:41,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:02:41,745 INFO L262 TraceCheckSpWp]: Trace formula consists of 717 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 22:02:41,751 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:02:41,774 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4900 trivial. 0 not checked. [2023-11-06 22:02:41,774 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:02:41,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:02:41,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045059259] [2023-11-06 22:02:41,775 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:02:41,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266823150] [2023-11-06 22:02:41,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266823150] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:02:41,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:02:41,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:02:41,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714608622] [2023-11-06 22:02:41,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:02:41,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:02:41,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:02:41,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:02:41,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:02:41,785 INFO L87 Difference]: Start difference. First operand 712 states and 965 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 1 states have call successors, (50), 1 states have call predecessors, (50), 1 states have return successors, (50), 1 states have call predecessors, (50), 1 states have call successors, (50) [2023-11-06 22:02:42,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:02:42,032 INFO L93 Difference]: Finished difference Result 1400 states and 1896 transitions. [2023-11-06 22:02:42,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:02:42,033 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 1 states have call successors, (50), 1 states have call predecessors, (50), 1 states have return successors, (50), 1 states have call predecessors, (50), 1 states have call successors, (50) Word has length 309 [2023-11-06 22:02:42,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:02:42,038 INFO L225 Difference]: With dead ends: 1400 [2023-11-06 22:02:42,038 INFO L226 Difference]: Without dead ends: 729 [2023-11-06 22:02:42,041 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 307 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:02:42,041 INFO L413 NwaCegarLoop]: 218 mSDtfsCounter, 27 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:02:42,042 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 408 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:02:42,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 729 states. [2023-11-06 22:02:42,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 729 to 652. [2023-11-06 22:02:42,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 652 states, 432 states have (on average 1.2106481481481481) internal successors, (523), 437 states have internal predecessors, (523), 182 states have call successors, (182), 37 states have call predecessors, (182), 37 states have return successors, (182), 177 states have call predecessors, (182), 182 states have call successors, (182) [2023-11-06 22:02:42,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 652 states to 652 states and 887 transitions. [2023-11-06 22:02:42,221 INFO L78 Accepts]: Start accepts. Automaton has 652 states and 887 transitions. Word has length 309 [2023-11-06 22:02:42,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:02:42,221 INFO L495 AbstractCegarLoop]: Abstraction has 652 states and 887 transitions. [2023-11-06 22:02:42,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 1 states have call successors, (50), 1 states have call predecessors, (50), 1 states have return successors, (50), 1 states have call predecessors, (50), 1 states have call successors, (50) [2023-11-06 22:02:42,222 INFO L276 IsEmpty]: Start isEmpty. Operand 652 states and 887 transitions. [2023-11-06 22:02:42,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2023-11-06 22:02:42,225 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:02:42,225 INFO L195 NwaCegarLoop]: trace histogram [50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:02:42,237 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed166edc-9157-4a76-ae9a-bddf0fa767ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-06 22:02:42,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed166edc-9157-4a76-ae9a-bddf0fa767ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-06 22:02:42,433 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:02:42,433 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:02:42,433 INFO L85 PathProgramCache]: Analyzing trace with hash -1065800549, now seen corresponding path program 1 times [2023-11-06 22:02:42,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:02:42,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615070576] [2023-11-06 22:02:42,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:02:42,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:02:42,472 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:02:42,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [546966303] [2023-11-06 22:02:42,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:02:42,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:02:42,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed166edc-9157-4a76-ae9a-bddf0fa767ca/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:02:42,474 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed166edc-9157-4a76-ae9a-bddf0fa767ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:02:42,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed166edc-9157-4a76-ae9a-bddf0fa767ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-06 22:02:42,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:02:42,888 INFO L262 TraceCheckSpWp]: Trace formula consists of 714 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-06 22:02:42,897 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:03:02,429 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 100 proven. 288 refuted. 0 times theorem prover too weak. 4512 trivial. 0 not checked. [2023-11-06 22:03:02,429 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:03:10,370 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4900 trivial. 0 not checked. [2023-11-06 22:03:10,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:03:10,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615070576] [2023-11-06 22:03:10,373 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:03:10,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546966303] [2023-11-06 22:03:10,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546966303] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 22:03:10,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:03:10,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [16] total 23 [2023-11-06 22:03:10,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562959909] [2023-11-06 22:03:10,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:03:10,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-06 22:03:10,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:03:10,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-06 22:03:10,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2023-11-06 22:03:10,378 INFO L87 Difference]: Start difference. First operand 652 states and 887 transitions. Second operand has 9 states, 9 states have (on average 6.888888888888889) internal successors, (62), 9 states have internal predecessors, (62), 1 states have call successors, (50), 1 states have call predecessors, (50), 1 states have return successors, (50), 1 states have call predecessors, (50), 1 states have call successors, (50) [2023-11-06 22:03:12,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:03:12,092 INFO L93 Difference]: Finished difference Result 1505 states and 2007 transitions. [2023-11-06 22:03:12,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-06 22:03:12,093 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.888888888888889) internal successors, (62), 9 states have internal predecessors, (62), 1 states have call successors, (50), 1 states have call predecessors, (50), 1 states have return successors, (50), 1 states have call predecessors, (50), 1 states have call successors, (50) Word has length 309 [2023-11-06 22:03:12,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:03:12,098 INFO L225 Difference]: With dead ends: 1505 [2023-11-06 22:03:12,098 INFO L226 Difference]: Without dead ends: 894 [2023-11-06 22:03:12,100 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 622 GetRequests, 595 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=173, Invalid=639, Unknown=0, NotChecked=0, Total=812 [2023-11-06 22:03:12,101 INFO L413 NwaCegarLoop]: 193 mSDtfsCounter, 220 mSDsluCounter, 703 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 896 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-06 22:03:12,101 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 896 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-06 22:03:12,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 894 states. [2023-11-06 22:03:12,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 894 to 682. [2023-11-06 22:03:12,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 682 states, 462 states have (on average 1.2164502164502164) internal successors, (562), 467 states have internal predecessors, (562), 182 states have call successors, (182), 37 states have call predecessors, (182), 37 states have return successors, (182), 177 states have call predecessors, (182), 182 states have call successors, (182) [2023-11-06 22:03:12,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 926 transitions. [2023-11-06 22:03:12,308 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 926 transitions. Word has length 309 [2023-11-06 22:03:12,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:03:12,309 INFO L495 AbstractCegarLoop]: Abstraction has 682 states and 926 transitions. [2023-11-06 22:03:12,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.888888888888889) internal successors, (62), 9 states have internal predecessors, (62), 1 states have call successors, (50), 1 states have call predecessors, (50), 1 states have return successors, (50), 1 states have call predecessors, (50), 1 states have call successors, (50) [2023-11-06 22:03:12,310 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 926 transitions. [2023-11-06 22:03:12,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2023-11-06 22:03:12,312 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:03:12,313 INFO L195 NwaCegarLoop]: trace histogram [50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:03:12,325 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed166edc-9157-4a76-ae9a-bddf0fa767ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-06 22:03:12,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed166edc-9157-4a76-ae9a-bddf0fa767ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-06 22:03:12,525 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:03:12,526 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:03:12,526 INFO L85 PathProgramCache]: Analyzing trace with hash 1712324823, now seen corresponding path program 1 times [2023-11-06 22:03:12,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:03:12,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582350445] [2023-11-06 22:03:12,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:03:12,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:03:12,563 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:03:12,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [45119257] [2023-11-06 22:03:12,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:03:12,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:03:12,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed166edc-9157-4a76-ae9a-bddf0fa767ca/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:03:12,565 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed166edc-9157-4a76-ae9a-bddf0fa767ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:03:12,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed166edc-9157-4a76-ae9a-bddf0fa767ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-06 22:03:12,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:03:12,826 INFO L262 TraceCheckSpWp]: Trace formula consists of 716 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 22:03:12,832 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:03:12,861 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4900 trivial. 0 not checked. [2023-11-06 22:03:12,861 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:03:12,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:03:12,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582350445] [2023-11-06 22:03:12,862 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:03:12,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45119257] [2023-11-06 22:03:12,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45119257] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:03:12,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:03:12,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:03:12,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755191545] [2023-11-06 22:03:12,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:03:12,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:03:12,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:03:12,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:03:12,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:03:12,866 INFO L87 Difference]: Start difference. First operand 682 states and 926 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 1 states have call successors, (50), 1 states have call predecessors, (50), 1 states have return successors, (50), 1 states have call predecessors, (50), 1 states have call successors, (50) [2023-11-06 22:03:13,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:03:13,223 INFO L93 Difference]: Finished difference Result 1412 states and 1911 transitions. [2023-11-06 22:03:13,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:03:13,224 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 1 states have call successors, (50), 1 states have call predecessors, (50), 1 states have return successors, (50), 1 states have call predecessors, (50), 1 states have call successors, (50) Word has length 309 [2023-11-06 22:03:13,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:03:13,230 INFO L225 Difference]: With dead ends: 1412 [2023-11-06 22:03:13,230 INFO L226 Difference]: Without dead ends: 771 [2023-11-06 22:03:13,232 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 306 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:03:13,233 INFO L413 NwaCegarLoop]: 212 mSDtfsCounter, 63 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 583 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:03:13,233 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 583 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:03:13,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2023-11-06 22:03:13,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 688. [2023-11-06 22:03:13,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 688 states, 468 states have (on average 1.2136752136752136) internal successors, (568), 473 states have internal predecessors, (568), 182 states have call successors, (182), 37 states have call predecessors, (182), 37 states have return successors, (182), 177 states have call predecessors, (182), 182 states have call successors, (182) [2023-11-06 22:03:13,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 688 states to 688 states and 932 transitions. [2023-11-06 22:03:13,468 INFO L78 Accepts]: Start accepts. Automaton has 688 states and 932 transitions. Word has length 309 [2023-11-06 22:03:13,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:03:13,469 INFO L495 AbstractCegarLoop]: Abstraction has 688 states and 932 transitions. [2023-11-06 22:03:13,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 1 states have call successors, (50), 1 states have call predecessors, (50), 1 states have return successors, (50), 1 states have call predecessors, (50), 1 states have call successors, (50) [2023-11-06 22:03:13,470 INFO L276 IsEmpty]: Start isEmpty. Operand 688 states and 932 transitions. [2023-11-06 22:03:13,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2023-11-06 22:03:13,473 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:03:13,473 INFO L195 NwaCegarLoop]: trace histogram [50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:03:13,480 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed166edc-9157-4a76-ae9a-bddf0fa767ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-06 22:03:13,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed166edc-9157-4a76-ae9a-bddf0fa767ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-06 22:03:13,681 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:03:13,681 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:03:13,681 INFO L85 PathProgramCache]: Analyzing trace with hash -1652606563, now seen corresponding path program 1 times [2023-11-06 22:03:13,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:03:13,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185574995] [2023-11-06 22:03:13,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:03:13,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:03:13,720 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:03:13,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [357615899] [2023-11-06 22:03:13,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:03:13,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:03:13,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed166edc-9157-4a76-ae9a-bddf0fa767ca/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:03:13,722 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed166edc-9157-4a76-ae9a-bddf0fa767ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:03:13,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed166edc-9157-4a76-ae9a-bddf0fa767ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-06 22:03:14,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:03:14,103 INFO L262 TraceCheckSpWp]: Trace formula consists of 711 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-06 22:03:14,112 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:03:33,519 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 100 proven. 288 refuted. 0 times theorem prover too weak. 4512 trivial. 0 not checked. [2023-11-06 22:03:33,519 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:03:40,726 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4900 trivial. 0 not checked. [2023-11-06 22:03:40,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:03:40,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185574995] [2023-11-06 22:03:40,727 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:03:40,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357615899] [2023-11-06 22:03:40,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357615899] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 22:03:40,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:03:40,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [16] total 23 [2023-11-06 22:03:40,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858907458] [2023-11-06 22:03:40,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:03:40,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-06 22:03:40,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:03:40,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-06 22:03:40,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2023-11-06 22:03:40,733 INFO L87 Difference]: Start difference. First operand 688 states and 932 transitions. Second operand has 9 states, 9 states have (on average 6.888888888888889) internal successors, (62), 9 states have internal predecessors, (62), 1 states have call successors, (50), 1 states have call predecessors, (50), 1 states have return successors, (50), 1 states have call predecessors, (50), 1 states have call successors, (50) [2023-11-06 22:03:42,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:03:42,253 INFO L93 Difference]: Finished difference Result 1464 states and 1958 transitions. [2023-11-06 22:03:42,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-06 22:03:42,254 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.888888888888889) internal successors, (62), 9 states have internal predecessors, (62), 1 states have call successors, (50), 1 states have call predecessors, (50), 1 states have return successors, (50), 1 states have call predecessors, (50), 1 states have call successors, (50) Word has length 309 [2023-11-06 22:03:42,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:03:42,259 INFO L225 Difference]: With dead ends: 1464 [2023-11-06 22:03:42,260 INFO L226 Difference]: Without dead ends: 817 [2023-11-06 22:03:42,262 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 621 GetRequests, 595 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=161, Invalid=595, Unknown=0, NotChecked=0, Total=756 [2023-11-06 22:03:42,263 INFO L413 NwaCegarLoop]: 204 mSDtfsCounter, 167 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 627 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-06 22:03:42,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 627 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-06 22:03:42,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 817 states. [2023-11-06 22:03:42,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 817 to 688. [2023-11-06 22:03:42,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 688 states, 468 states have (on average 1.2136752136752136) internal successors, (568), 473 states have internal predecessors, (568), 182 states have call successors, (182), 37 states have call predecessors, (182), 37 states have return successors, (182), 177 states have call predecessors, (182), 182 states have call successors, (182) [2023-11-06 22:03:42,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 688 states to 688 states and 932 transitions. [2023-11-06 22:03:42,492 INFO L78 Accepts]: Start accepts. Automaton has 688 states and 932 transitions. Word has length 309 [2023-11-06 22:03:42,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:03:42,492 INFO L495 AbstractCegarLoop]: Abstraction has 688 states and 932 transitions. [2023-11-06 22:03:42,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.888888888888889) internal successors, (62), 9 states have internal predecessors, (62), 1 states have call successors, (50), 1 states have call predecessors, (50), 1 states have return successors, (50), 1 states have call predecessors, (50), 1 states have call successors, (50) [2023-11-06 22:03:42,492 INFO L276 IsEmpty]: Start isEmpty. Operand 688 states and 932 transitions. [2023-11-06 22:03:42,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2023-11-06 22:03:42,495 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:03:42,495 INFO L195 NwaCegarLoop]: trace histogram [50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:03:42,503 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed166edc-9157-4a76-ae9a-bddf0fa767ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-06 22:03:42,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed166edc-9157-4a76-ae9a-bddf0fa767ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-06 22:03:42,703 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:03:42,703 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:03:42,704 INFO L85 PathProgramCache]: Analyzing trace with hash -2076917799, now seen corresponding path program 1 times [2023-11-06 22:03:42,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:03:42,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812580748] [2023-11-06 22:03:42,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:03:42,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:03:42,763 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:03:42,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [314382351] [2023-11-06 22:03:42,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:03:42,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:03:42,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed166edc-9157-4a76-ae9a-bddf0fa767ca/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:03:42,767 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed166edc-9157-4a76-ae9a-bddf0fa767ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:03:42,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed166edc-9157-4a76-ae9a-bddf0fa767ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-06 22:03:43,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:03:43,062 INFO L262 TraceCheckSpWp]: Trace formula consists of 713 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-06 22:03:43,068 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:03:44,734 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 49 proven. 147 refuted. 0 times theorem prover too weak. 4704 trivial. 0 not checked. [2023-11-06 22:03:44,735 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:03:46,040 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 4753 trivial. 0 not checked. [2023-11-06 22:03:46,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:03:46,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812580748] [2023-11-06 22:03:46,041 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:03:46,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314382351] [2023-11-06 22:03:46,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314382351] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:03:46,041 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:03:46,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2023-11-06 22:03:46,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428693903] [2023-11-06 22:03:46,042 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:03:46,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-06 22:03:46,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:03:46,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-06 22:03:46,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2023-11-06 22:03:46,045 INFO L87 Difference]: Start difference. First operand 688 states and 932 transitions. Second operand has 18 states, 18 states have (on average 6.5) internal successors, (117), 18 states have internal predecessors, (117), 4 states have call successors, (100), 3 states have call predecessors, (100), 4 states have return successors, (100), 2 states have call predecessors, (100), 4 states have call successors, (100) [2023-11-06 22:03:48,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:03:48,427 INFO L93 Difference]: Finished difference Result 1723 states and 2333 transitions. [2023-11-06 22:03:48,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-06 22:03:48,428 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 6.5) internal successors, (117), 18 states have internal predecessors, (117), 4 states have call successors, (100), 3 states have call predecessors, (100), 4 states have return successors, (100), 2 states have call predecessors, (100), 4 states have call successors, (100) Word has length 309 [2023-11-06 22:03:48,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:03:48,434 INFO L225 Difference]: With dead ends: 1723 [2023-11-06 22:03:48,434 INFO L226 Difference]: Without dead ends: 1076 [2023-11-06 22:03:48,437 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 632 GetRequests, 602 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=264, Invalid=728, Unknown=0, NotChecked=0, Total=992 [2023-11-06 22:03:48,437 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 741 mSDsluCounter, 928 mSDsCounter, 0 mSdLazyCounter, 1394 mSolverCounterSat, 235 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 790 SdHoareTripleChecker+Valid, 1069 SdHoareTripleChecker+Invalid, 1629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 235 IncrementalHoareTripleChecker+Valid, 1394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-11-06 22:03:48,438 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [790 Valid, 1069 Invalid, 1629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [235 Valid, 1394 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-11-06 22:03:48,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1076 states. [2023-11-06 22:03:48,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1076 to 853. [2023-11-06 22:03:48,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 590 states have (on average 1.259322033898305) internal successors, (743), 594 states have internal predecessors, (743), 221 states have call successors, (221), 41 states have call predecessors, (221), 41 states have return successors, (221), 217 states have call predecessors, (221), 221 states have call successors, (221) [2023-11-06 22:03:48,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 1185 transitions. [2023-11-06 22:03:48,826 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 1185 transitions. Word has length 309 [2023-11-06 22:03:48,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:03:48,826 INFO L495 AbstractCegarLoop]: Abstraction has 853 states and 1185 transitions. [2023-11-06 22:03:48,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.5) internal successors, (117), 18 states have internal predecessors, (117), 4 states have call successors, (100), 3 states have call predecessors, (100), 4 states have return successors, (100), 2 states have call predecessors, (100), 4 states have call successors, (100) [2023-11-06 22:03:48,827 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 1185 transitions. [2023-11-06 22:03:48,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2023-11-06 22:03:48,830 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:03:48,830 INFO L195 NwaCegarLoop]: trace histogram [50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:03:48,837 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed166edc-9157-4a76-ae9a-bddf0fa767ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-06 22:03:49,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed166edc-9157-4a76-ae9a-bddf0fa767ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-06 22:03:49,037 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:03:49,037 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:03:49,038 INFO L85 PathProgramCache]: Analyzing trace with hash -890461892, now seen corresponding path program 1 times [2023-11-06 22:03:49,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:03:49,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842672356] [2023-11-06 22:03:49,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:03:49,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:03:49,085 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:03:49,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1173691496] [2023-11-06 22:03:49,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:03:49,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:03:49,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed166edc-9157-4a76-ae9a-bddf0fa767ca/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:03:49,087 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed166edc-9157-4a76-ae9a-bddf0fa767ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:03:49,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed166edc-9157-4a76-ae9a-bddf0fa767ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-06 22:03:49,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:03:49,492 INFO L262 TraceCheckSpWp]: Trace formula consists of 714 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-06 22:03:49,512 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:04:05,429 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 100 proven. 288 refuted. 0 times theorem prover too weak. 4512 trivial. 0 not checked. [2023-11-06 22:04:05,429 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:04:13,443 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4900 trivial. 0 not checked. [2023-11-06 22:04:13,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:04:13,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842672356] [2023-11-06 22:04:13,443 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:04:13,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173691496] [2023-11-06 22:04:13,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173691496] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 22:04:13,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:04:13,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [17] total 25 [2023-11-06 22:04:13,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802737257] [2023-11-06 22:04:13,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:04:13,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 22:04:13,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:04:13,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 22:04:13,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=456, Unknown=0, NotChecked=0, Total=600 [2023-11-06 22:04:13,449 INFO L87 Difference]: Start difference. First operand 853 states and 1185 transitions. Second operand has 10 states, 10 states have (on average 6.3) internal successors, (63), 10 states have internal predecessors, (63), 1 states have call successors, (50), 1 states have call predecessors, (50), 1 states have return successors, (50), 1 states have call predecessors, (50), 1 states have call successors, (50) [2023-11-06 22:04:14,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:04:14,574 INFO L93 Difference]: Finished difference Result 1665 states and 2259 transitions. [2023-11-06 22:04:14,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-06 22:04:14,575 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.3) internal successors, (63), 10 states have internal predecessors, (63), 1 states have call successors, (50), 1 states have call predecessors, (50), 1 states have return successors, (50), 1 states have call predecessors, (50), 1 states have call successors, (50) Word has length 310 [2023-11-06 22:04:14,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:04:14,580 INFO L225 Difference]: With dead ends: 1665 [2023-11-06 22:04:14,581 INFO L226 Difference]: Without dead ends: 1018 [2023-11-06 22:04:14,582 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 622 GetRequests, 595 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=184, Invalid=628, Unknown=0, NotChecked=0, Total=812 [2023-11-06 22:04:14,583 INFO L413 NwaCegarLoop]: 184 mSDtfsCounter, 167 mSDsluCounter, 532 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 716 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 22:04:14,583 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 716 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 22:04:14,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1018 states. [2023-11-06 22:04:14,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1018 to 859. [2023-11-06 22:04:14,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 859 states, 596 states have (on average 1.266778523489933) internal successors, (755), 600 states have internal predecessors, (755), 221 states have call successors, (221), 41 states have call predecessors, (221), 41 states have return successors, (221), 217 states have call predecessors, (221), 221 states have call successors, (221) [2023-11-06 22:04:14,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 859 states to 859 states and 1197 transitions. [2023-11-06 22:04:14,873 INFO L78 Accepts]: Start accepts. Automaton has 859 states and 1197 transitions. Word has length 310 [2023-11-06 22:04:14,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:04:14,874 INFO L495 AbstractCegarLoop]: Abstraction has 859 states and 1197 transitions. [2023-11-06 22:04:14,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.3) internal successors, (63), 10 states have internal predecessors, (63), 1 states have call successors, (50), 1 states have call predecessors, (50), 1 states have return successors, (50), 1 states have call predecessors, (50), 1 states have call successors, (50) [2023-11-06 22:04:14,874 INFO L276 IsEmpty]: Start isEmpty. Operand 859 states and 1197 transitions. [2023-11-06 22:04:14,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2023-11-06 22:04:14,877 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:04:14,877 INFO L195 NwaCegarLoop]: trace histogram [50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:04:14,883 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed166edc-9157-4a76-ae9a-bddf0fa767ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-11-06 22:04:15,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed166edc-9157-4a76-ae9a-bddf0fa767ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:04:15,078 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:04:15,078 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:04:15,078 INFO L85 PathProgramCache]: Analyzing trace with hash 1887663480, now seen corresponding path program 1 times [2023-11-06 22:04:15,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:04:15,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485907187] [2023-11-06 22:04:15,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:04:15,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:04:15,116 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:04:15,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1332605013] [2023-11-06 22:04:15,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:04:15,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:04:15,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed166edc-9157-4a76-ae9a-bddf0fa767ca/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:04:15,118 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed166edc-9157-4a76-ae9a-bddf0fa767ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:04:15,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed166edc-9157-4a76-ae9a-bddf0fa767ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-06 22:04:15,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:04:15,443 INFO L262 TraceCheckSpWp]: Trace formula consists of 716 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-06 22:04:15,448 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:04:16,457 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 49 proven. 147 refuted. 0 times theorem prover too weak. 4704 trivial. 0 not checked. [2023-11-06 22:04:16,458 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:04:16,896 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 4753 trivial. 0 not checked. [2023-11-06 22:04:16,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:04:16,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485907187] [2023-11-06 22:04:16,896 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:04:16,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332605013] [2023-11-06 22:04:16,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332605013] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:04:16,897 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:04:16,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2023-11-06 22:04:16,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823138636] [2023-11-06 22:04:16,897 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:04:16,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-06 22:04:16,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:04:16,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-06 22:04:16,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2023-11-06 22:04:16,900 INFO L87 Difference]: Start difference. First operand 859 states and 1197 transitions. Second operand has 15 states, 15 states have (on average 7.733333333333333) internal successors, (116), 15 states have internal predecessors, (116), 4 states have call successors, (100), 3 states have call predecessors, (100), 4 states have return successors, (100), 2 states have call predecessors, (100), 4 states have call successors, (100) [2023-11-06 22:04:18,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:04:18,702 INFO L93 Difference]: Finished difference Result 1856 states and 2488 transitions. [2023-11-06 22:04:18,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-06 22:04:18,703 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 7.733333333333333) internal successors, (116), 15 states have internal predecessors, (116), 4 states have call successors, (100), 3 states have call predecessors, (100), 4 states have return successors, (100), 2 states have call predecessors, (100), 4 states have call successors, (100) Word has length 310 [2023-11-06 22:04:18,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:04:18,711 INFO L225 Difference]: With dead ends: 1856 [2023-11-06 22:04:18,711 INFO L226 Difference]: Without dead ends: 1203 [2023-11-06 22:04:18,714 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 634 GetRequests, 607 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=197, Invalid=559, Unknown=0, NotChecked=0, Total=756 [2023-11-06 22:04:18,714 INFO L413 NwaCegarLoop]: 156 mSDtfsCounter, 490 mSDsluCounter, 751 mSDsCounter, 0 mSdLazyCounter, 1087 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 540 SdHoareTripleChecker+Valid, 907 SdHoareTripleChecker+Invalid, 1232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 1087 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:04:18,715 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [540 Valid, 907 Invalid, 1232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 1087 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-06 22:04:18,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1203 states. [2023-11-06 22:04:19,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1203 to 862. [2023-11-06 22:04:19,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 862 states, 599 states have (on average 1.2704507512520868) internal successors, (761), 603 states have internal predecessors, (761), 221 states have call successors, (221), 41 states have call predecessors, (221), 41 states have return successors, (221), 217 states have call predecessors, (221), 221 states have call successors, (221) [2023-11-06 22:04:19,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 1203 transitions. [2023-11-06 22:04:19,052 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 1203 transitions. Word has length 310 [2023-11-06 22:04:19,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:04:19,053 INFO L495 AbstractCegarLoop]: Abstraction has 862 states and 1203 transitions. [2023-11-06 22:04:19,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 7.733333333333333) internal successors, (116), 15 states have internal predecessors, (116), 4 states have call successors, (100), 3 states have call predecessors, (100), 4 states have return successors, (100), 2 states have call predecessors, (100), 4 states have call successors, (100) [2023-11-06 22:04:19,053 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 1203 transitions. [2023-11-06 22:04:19,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2023-11-06 22:04:19,056 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:04:19,056 INFO L195 NwaCegarLoop]: trace histogram [50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:04:19,067 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed166edc-9157-4a76-ae9a-bddf0fa767ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-11-06 22:04:19,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed166edc-9157-4a76-ae9a-bddf0fa767ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:04:19,263 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:04:19,263 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:04:19,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1477267906, now seen corresponding path program 1 times [2023-11-06 22:04:19,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:04:19,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468344818] [2023-11-06 22:04:19,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:04:19,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:04:19,309 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:04:19,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1910517677] [2023-11-06 22:04:19,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:04:19,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:04:19,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed166edc-9157-4a76-ae9a-bddf0fa767ca/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:04:19,311 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed166edc-9157-4a76-ae9a-bddf0fa767ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:04:19,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed166edc-9157-4a76-ae9a-bddf0fa767ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-06 22:04:19,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:04:19,756 INFO L262 TraceCheckSpWp]: Trace formula consists of 711 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-06 22:04:19,761 INFO L285 TraceCheckSpWp]: Computing forward predicates...