./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-83.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cab7a20-46bb-4401-b231-c951fb644f71/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cab7a20-46bb-4401-b231-c951fb644f71/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cab7a20-46bb-4401-b231-c951fb644f71/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cab7a20-46bb-4401-b231-c951fb644f71/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-83.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cab7a20-46bb-4401-b231-c951fb644f71/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cab7a20-46bb-4401-b231-c951fb644f71/bin/uautomizer-verify-uCwYo4JHxu --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 975c15972d2e28638994433ae48be96fd627b5ee7b57bfcfea19e46a5c8b87bf --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:37:27,943 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:37:28,061 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cab7a20-46bb-4401-b231-c951fb644f71/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 07:37:28,068 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:37:28,069 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:37:28,108 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:37:28,109 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:37:28,110 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:37:28,112 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:37:28,117 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:37:28,119 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:37:28,119 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:37:28,120 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:37:28,122 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:37:28,122 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:37:28,123 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:37:28,123 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:37:28,124 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:37:28,124 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:37:28,124 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:37:28,125 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:37:28,126 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:37:28,126 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:37:28,128 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:37:28,128 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:37:28,129 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:37:28,130 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:37:28,130 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:37:28,131 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:37:28,131 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:37:28,133 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:37:28,133 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:37:28,133 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:37:28,134 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:37:28,134 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:37:28,134 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:37:28,135 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:37:28,135 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:37:28,135 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:37:28,136 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_9cab7a20-46bb-4401-b231-c951fb644f71/bin/uautomizer-verify-uCwYo4JHxu/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cab7a20-46bb-4401-b231-c951fb644f71/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 975c15972d2e28638994433ae48be96fd627b5ee7b57bfcfea19e46a5c8b87bf [2023-11-19 07:37:28,501 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:37:28,543 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:37:28,546 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:37:28,548 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:37:28,548 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:37:28,549 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cab7a20-46bb-4401-b231-c951fb644f71/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-83.i [2023-11-19 07:37:31,718 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:37:32,024 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:37:32,025 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cab7a20-46bb-4401-b231-c951fb644f71/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-83.i [2023-11-19 07:37:32,040 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cab7a20-46bb-4401-b231-c951fb644f71/bin/uautomizer-verify-uCwYo4JHxu/data/d1b960c8f/3698fc462e874b3f96ab631d21e6f707/FLAGe77f1480d [2023-11-19 07:37:32,055 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cab7a20-46bb-4401-b231-c951fb644f71/bin/uautomizer-verify-uCwYo4JHxu/data/d1b960c8f/3698fc462e874b3f96ab631d21e6f707 [2023-11-19 07:37:32,058 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:37:32,060 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:37:32,061 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:37:32,062 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:37:32,067 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:37:32,068 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:37:32" (1/1) ... [2023-11-19 07:37:32,069 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@773b4fb3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:32, skipping insertion in model container [2023-11-19 07:37:32,069 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:37:32" (1/1) ... [2023-11-19 07:37:32,119 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:37:32,299 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_9cab7a20-46bb-4401-b231-c951fb644f71/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-83.i[916,929] [2023-11-19 07:37:32,572 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:37:32,591 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:37:32,604 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_9cab7a20-46bb-4401-b231-c951fb644f71/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-83.i[916,929] [2023-11-19 07:37:32,722 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:37:32,753 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:37:32,788 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:32 WrapperNode [2023-11-19 07:37:32,788 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:37:32,790 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:37:32,790 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:37:32,790 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:37:32,799 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:32" (1/1) ... [2023-11-19 07:37:32,836 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:32" (1/1) ... [2023-11-19 07:37:32,990 INFO L138 Inliner]: procedures = 26, calls = 118, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 1002 [2023-11-19 07:37:32,991 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:37:32,992 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:37:32,993 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:37:32,993 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:37:33,004 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:32" (1/1) ... [2023-11-19 07:37:33,004 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:32" (1/1) ... [2023-11-19 07:37:33,030 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:32" (1/1) ... [2023-11-19 07:37:33,036 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:32" (1/1) ... [2023-11-19 07:37:33,090 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:32" (1/1) ... [2023-11-19 07:37:33,107 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:32" (1/1) ... [2023-11-19 07:37:33,131 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:32" (1/1) ... [2023-11-19 07:37:33,155 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:32" (1/1) ... [2023-11-19 07:37:33,180 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:37:33,182 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:37:33,182 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:37:33,182 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:37:33,183 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:32" (1/1) ... [2023-11-19 07:37:33,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:37:33,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cab7a20-46bb-4401-b231-c951fb644f71/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:37:33,220 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cab7a20-46bb-4401-b231-c951fb644f71/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:37:33,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cab7a20-46bb-4401-b231-c951fb644f71/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:37:33,272 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:37:33,272 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-19 07:37:33,273 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-19 07:37:33,273 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:37:33,273 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:37:33,273 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:37:33,466 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:37:33,468 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:37:34,964 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:37:34,987 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:37:34,987 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-19 07:37:35,000 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:37:35 BoogieIcfgContainer [2023-11-19 07:37:35,001 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:37:35,006 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:37:35,006 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:37:35,009 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:37:35,010 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:37:32" (1/3) ... [2023-11-19 07:37:35,011 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e06409d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:37:35, skipping insertion in model container [2023-11-19 07:37:35,011 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:32" (2/3) ... [2023-11-19 07:37:35,012 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e06409d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:37:35, skipping insertion in model container [2023-11-19 07:37:35,012 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:37:35" (3/3) ... [2023-11-19 07:37:35,014 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_fillercode_fillercodesize_ps-cn-500_file-83.i [2023-11-19 07:37:35,034 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:37:35,035 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 07:37:35,113 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:37:35,121 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@7828d8fa, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:37:35,122 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 07:37:35,130 INFO L276 IsEmpty]: Start isEmpty. Operand has 357 states, 249 states have (on average 1.6666666666666667) internal successors, (415), 250 states have internal predecessors, (415), 105 states have call successors, (105), 1 states have call predecessors, (105), 1 states have return successors, (105), 105 states have call predecessors, (105), 105 states have call successors, (105) [2023-11-19 07:37:35,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 686 [2023-11-19 07:37:35,196 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:37:35,198 INFO L195 NwaCegarLoop]: trace histogram [105, 105, 105, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:37:35,199 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:37:35,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:37:35,207 INFO L85 PathProgramCache]: Analyzing trace with hash -1835408979, now seen corresponding path program 1 times [2023-11-19 07:37:35,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:37:35,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698476596] [2023-11-19 07:37:35,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:35,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:37:35,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:35,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:37:35,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698476596] [2023-11-19 07:37:35,757 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-19 07:37:35,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110037409] [2023-11-19 07:37:35,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:35,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:37:35,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cab7a20-46bb-4401-b231-c951fb644f71/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:37:35,760 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cab7a20-46bb-4401-b231-c951fb644f71/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:37:35,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cab7a20-46bb-4401-b231-c951fb644f71/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:37:36,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:36,268 INFO L262 TraceCheckSpWp]: Trace formula consists of 1645 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-19 07:37:36,294 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:37:36,472 INFO L134 CoverageAnalysis]: Checked inductivity of 21840 backedges. 208 proven. 0 refuted. 0 times theorem prover too weak. 21632 trivial. 0 not checked. [2023-11-19 07:37:36,472 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:37:36,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110037409] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:37:36,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:37:36,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:37:36,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610391469] [2023-11-19 07:37:36,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:37:36,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 07:37:36,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:37:36,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 07:37:36,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 07:37:36,520 INFO L87 Difference]: Start difference. First operand has 357 states, 249 states have (on average 1.6666666666666667) internal successors, (415), 250 states have internal predecessors, (415), 105 states have call successors, (105), 1 states have call predecessors, (105), 1 states have return successors, (105), 105 states have call predecessors, (105), 105 states have call successors, (105) Second operand has 2 states, 2 states have (on average 82.5) internal successors, (165), 2 states have internal predecessors, (165), 2 states have call successors, (105), 2 states have call predecessors, (105), 1 states have return successors, (105), 1 states have call predecessors, (105), 2 states have call successors, (105) [2023-11-19 07:37:36,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:37:36,598 INFO L93 Difference]: Finished difference Result 707 states and 1349 transitions. [2023-11-19 07:37:36,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 07:37:36,602 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 82.5) internal successors, (165), 2 states have internal predecessors, (165), 2 states have call successors, (105), 2 states have call predecessors, (105), 1 states have return successors, (105), 1 states have call predecessors, (105), 2 states have call successors, (105) Word has length 685 [2023-11-19 07:37:36,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:37:36,617 INFO L225 Difference]: With dead ends: 707 [2023-11-19 07:37:36,618 INFO L226 Difference]: Without dead ends: 353 [2023-11-19 07:37:36,626 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 684 GetRequests, 684 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 07:37:36,629 INFO L413 NwaCegarLoop]: 618 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, 618 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:37:36,630 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 618 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:37:36,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2023-11-19 07:37:36,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 353. [2023-11-19 07:37:36,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 246 states have (on average 1.6585365853658536) internal successors, (408), 246 states have internal predecessors, (408), 105 states have call successors, (105), 1 states have call predecessors, (105), 1 states have return successors, (105), 105 states have call predecessors, (105), 105 states have call successors, (105) [2023-11-19 07:37:36,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 618 transitions. [2023-11-19 07:37:36,735 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 618 transitions. Word has length 685 [2023-11-19 07:37:36,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:37:36,736 INFO L495 AbstractCegarLoop]: Abstraction has 353 states and 618 transitions. [2023-11-19 07:37:36,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 82.5) internal successors, (165), 2 states have internal predecessors, (165), 2 states have call successors, (105), 2 states have call predecessors, (105), 1 states have return successors, (105), 1 states have call predecessors, (105), 2 states have call successors, (105) [2023-11-19 07:37:36,737 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 618 transitions. [2023-11-19 07:37:36,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 686 [2023-11-19 07:37:36,758 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:37:36,759 INFO L195 NwaCegarLoop]: trace histogram [105, 105, 105, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:37:36,789 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cab7a20-46bb-4401-b231-c951fb644f71/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 07:37:36,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cab7a20-46bb-4401-b231-c951fb644f71/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:37:36,978 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:37:36,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:37:36,979 INFO L85 PathProgramCache]: Analyzing trace with hash -1995912445, now seen corresponding path program 1 times [2023-11-19 07:37:36,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:37:36,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279670454] [2023-11-19 07:37:36,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:36,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:37:37,183 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:37:37,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [316606054] [2023-11-19 07:37:37,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:37,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:37:37,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cab7a20-46bb-4401-b231-c951fb644f71/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:37:37,185 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cab7a20-46bb-4401-b231-c951fb644f71/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:37:37,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cab7a20-46bb-4401-b231-c951fb644f71/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:37:37,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:37,764 INFO L262 TraceCheckSpWp]: Trace formula consists of 1645 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 07:37:37,793 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:37:37,952 INFO L134 CoverageAnalysis]: Checked inductivity of 21840 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21840 trivial. 0 not checked. [2023-11-19 07:37:37,952 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:37:37,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:37:37,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279670454] [2023-11-19 07:37:37,956 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:37:37,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316606054] [2023-11-19 07:37:37,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316606054] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:37:37,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:37:37,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:37:37,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857653014] [2023-11-19 07:37:37,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:37:37,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:37:37,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:37:37,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:37:37,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:37:37,967 INFO L87 Difference]: Start difference. First operand 353 states and 618 transitions. Second operand has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 1 states have call successors, (105), 1 states have call predecessors, (105), 1 states have return successors, (105), 1 states have call predecessors, (105), 1 states have call successors, (105) [2023-11-19 07:37:38,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:37:38,066 INFO L93 Difference]: Finished difference Result 703 states and 1233 transitions. [2023-11-19 07:37:38,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:37:38,068 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 1 states have call successors, (105), 1 states have call predecessors, (105), 1 states have return successors, (105), 1 states have call predecessors, (105), 1 states have call successors, (105) Word has length 685 [2023-11-19 07:37:38,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:37:38,078 INFO L225 Difference]: With dead ends: 703 [2023-11-19 07:37:38,079 INFO L226 Difference]: Without dead ends: 353 [2023-11-19 07:37:38,081 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 684 GetRequests, 683 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:37:38,084 INFO L413 NwaCegarLoop]: 616 mSDtfsCounter, 0 mSDsluCounter, 610 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1226 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:37:38,086 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1226 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:37:38,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2023-11-19 07:37:38,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 353. [2023-11-19 07:37:38,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 246 states have (on average 1.6544715447154472) internal successors, (407), 246 states have internal predecessors, (407), 105 states have call successors, (105), 1 states have call predecessors, (105), 1 states have return successors, (105), 105 states have call predecessors, (105), 105 states have call successors, (105) [2023-11-19 07:37:38,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 617 transitions. [2023-11-19 07:37:38,160 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 617 transitions. Word has length 685 [2023-11-19 07:37:38,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:37:38,165 INFO L495 AbstractCegarLoop]: Abstraction has 353 states and 617 transitions. [2023-11-19 07:37:38,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 1 states have call successors, (105), 1 states have call predecessors, (105), 1 states have return successors, (105), 1 states have call predecessors, (105), 1 states have call successors, (105) [2023-11-19 07:37:38,167 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 617 transitions. [2023-11-19 07:37:38,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 686 [2023-11-19 07:37:38,193 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:37:38,194 INFO L195 NwaCegarLoop]: trace histogram [105, 105, 105, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:37:38,222 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cab7a20-46bb-4401-b231-c951fb644f71/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:37:38,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cab7a20-46bb-4401-b231-c951fb644f71/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:37:38,408 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:37:38,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:37:38,409 INFO L85 PathProgramCache]: Analyzing trace with hash 1269695553, now seen corresponding path program 1 times [2023-11-19 07:37:38,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:37:38,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012568668] [2023-11-19 07:37:38,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:38,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:37:38,595 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:37:38,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [909247176] [2023-11-19 07:37:38,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:38,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:37:38,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cab7a20-46bb-4401-b231-c951fb644f71/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:37:38,602 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cab7a20-46bb-4401-b231-c951fb644f71/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:37:38,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cab7a20-46bb-4401-b231-c951fb644f71/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:37:39,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:39,172 INFO L262 TraceCheckSpWp]: Trace formula consists of 1643 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 07:37:39,191 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:37:39,303 INFO L134 CoverageAnalysis]: Checked inductivity of 21840 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21840 trivial. 0 not checked. [2023-11-19 07:37:39,307 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:37:39,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:37:39,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012568668] [2023-11-19 07:37:39,308 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:37:39,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909247176] [2023-11-19 07:37:39,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909247176] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:37:39,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:37:39,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:37:39,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365277913] [2023-11-19 07:37:39,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:37:39,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:37:39,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:37:39,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:37:39,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:37:39,316 INFO L87 Difference]: Start difference. First operand 353 states and 617 transitions. Second operand has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 1 states have call successors, (105), 1 states have call predecessors, (105), 1 states have return successors, (105), 1 states have call predecessors, (105), 1 states have call successors, (105) [2023-11-19 07:37:39,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:37:39,390 INFO L93 Difference]: Finished difference Result 928 states and 1632 transitions. [2023-11-19 07:37:39,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:37:39,392 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 1 states have call successors, (105), 1 states have call predecessors, (105), 1 states have return successors, (105), 1 states have call predecessors, (105), 1 states have call successors, (105) Word has length 685 [2023-11-19 07:37:39,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:37:39,406 INFO L225 Difference]: With dead ends: 928 [2023-11-19 07:37:39,407 INFO L226 Difference]: Without dead ends: 578 [2023-11-19 07:37:39,409 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 684 GetRequests, 683 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:37:39,412 INFO L413 NwaCegarLoop]: 616 mSDtfsCounter, 381 mSDsluCounter, 606 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 381 SdHoareTripleChecker+Valid, 1222 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:37:39,417 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [381 Valid, 1222 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:37:39,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2023-11-19 07:37:39,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 575. [2023-11-19 07:37:39,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 423 states have (on average 1.6950354609929077) internal successors, (717), 424 states have internal predecessors, (717), 149 states have call successors, (149), 2 states have call predecessors, (149), 2 states have return successors, (149), 148 states have call predecessors, (149), 149 states have call successors, (149) [2023-11-19 07:37:39,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 1015 transitions. [2023-11-19 07:37:39,514 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 1015 transitions. Word has length 685 [2023-11-19 07:37:39,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:37:39,519 INFO L495 AbstractCegarLoop]: Abstraction has 575 states and 1015 transitions. [2023-11-19 07:37:39,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 1 states have call successors, (105), 1 states have call predecessors, (105), 1 states have return successors, (105), 1 states have call predecessors, (105), 1 states have call successors, (105) [2023-11-19 07:37:39,520 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 1015 transitions. [2023-11-19 07:37:39,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 686 [2023-11-19 07:37:39,529 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:37:39,529 INFO L195 NwaCegarLoop]: trace histogram [105, 105, 105, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:37:39,559 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cab7a20-46bb-4401-b231-c951fb644f71/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 07:37:39,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cab7a20-46bb-4401-b231-c951fb644f71/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-11-19 07:37:39,748 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:37:39,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:37:39,749 INFO L85 PathProgramCache]: Analyzing trace with hash -416484285, now seen corresponding path program 1 times [2023-11-19 07:37:39,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:37:39,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142205067] [2023-11-19 07:37:39,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:39,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:37:39,889 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:37:39,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [651333128] [2023-11-19 07:37:39,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:39,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:37:39,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cab7a20-46bb-4401-b231-c951fb644f71/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:37:39,891 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cab7a20-46bb-4401-b231-c951fb644f71/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:37:39,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cab7a20-46bb-4401-b231-c951fb644f71/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 07:37:40,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:40,439 INFO L262 TraceCheckSpWp]: Trace formula consists of 1646 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 07:37:40,453 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:37:40,523 INFO L134 CoverageAnalysis]: Checked inductivity of 21840 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21840 trivial. 0 not checked. [2023-11-19 07:37:40,523 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:37:40,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:37:40,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142205067] [2023-11-19 07:37:40,524 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:37:40,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651333128] [2023-11-19 07:37:40,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651333128] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:37:40,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:37:40,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:37:40,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44074654] [2023-11-19 07:37:40,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:37:40,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:37:40,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:37:40,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:37:40,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:37:40,529 INFO L87 Difference]: Start difference. First operand 575 states and 1015 transitions. Second operand has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 1 states have call successors, (105), 1 states have call predecessors, (105), 1 states have return successors, (105), 1 states have call predecessors, (105), 1 states have call successors, (105) [2023-11-19 07:37:40,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:37:40,631 INFO L93 Difference]: Finished difference Result 1513 states and 2666 transitions. [2023-11-19 07:37:40,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:37:40,632 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 1 states have call successors, (105), 1 states have call predecessors, (105), 1 states have return successors, (105), 1 states have call predecessors, (105), 1 states have call successors, (105) Word has length 685 [2023-11-19 07:37:40,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:37:40,642 INFO L225 Difference]: With dead ends: 1513 [2023-11-19 07:37:40,643 INFO L226 Difference]: Without dead ends: 941 [2023-11-19 07:37:40,645 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 684 GetRequests, 683 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:37:40,646 INFO L413 NwaCegarLoop]: 731 mSDtfsCounter, 305 mSDsluCounter, 599 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 1330 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:37:40,647 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [305 Valid, 1330 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:37:40,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 941 states. [2023-11-19 07:37:40,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 941 to 938. [2023-11-19 07:37:40,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 938 states, 694 states have (on average 1.6772334293948126) internal successors, (1164), 697 states have internal predecessors, (1164), 239 states have call successors, (239), 4 states have call predecessors, (239), 4 states have return successors, (239), 236 states have call predecessors, (239), 239 states have call successors, (239) [2023-11-19 07:37:40,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 938 states to 938 states and 1642 transitions. [2023-11-19 07:37:40,752 INFO L78 Accepts]: Start accepts. Automaton has 938 states and 1642 transitions. Word has length 685 [2023-11-19 07:37:40,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:37:40,754 INFO L495 AbstractCegarLoop]: Abstraction has 938 states and 1642 transitions. [2023-11-19 07:37:40,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 1 states have call successors, (105), 1 states have call predecessors, (105), 1 states have return successors, (105), 1 states have call predecessors, (105), 1 states have call successors, (105) [2023-11-19 07:37:40,755 INFO L276 IsEmpty]: Start isEmpty. Operand 938 states and 1642 transitions. [2023-11-19 07:37:40,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 686 [2023-11-19 07:37:40,763 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:37:40,763 INFO L195 NwaCegarLoop]: trace histogram [105, 105, 105, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:37:40,795 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cab7a20-46bb-4401-b231-c951fb644f71/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 07:37:40,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cab7a20-46bb-4401-b231-c951fb644f71/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:37:40,986 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:37:40,987 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:37:40,987 INFO L85 PathProgramCache]: Analyzing trace with hash -400965567, now seen corresponding path program 1 times [2023-11-19 07:37:40,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:37:40,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984768277] [2023-11-19 07:37:40,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:40,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:37:41,121 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:37:41,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [239471925] [2023-11-19 07:37:41,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:41,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:37:41,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cab7a20-46bb-4401-b231-c951fb644f71/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:37:41,126 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cab7a20-46bb-4401-b231-c951fb644f71/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:37:41,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cab7a20-46bb-4401-b231-c951fb644f71/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 07:37:41,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:41,673 INFO L262 TraceCheckSpWp]: Trace formula consists of 1647 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-19 07:37:41,690 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:37:44,473 INFO L134 CoverageAnalysis]: Checked inductivity of 21840 backedges. 16016 proven. 198 refuted. 0 times theorem prover too weak. 5626 trivial. 0 not checked. [2023-11-19 07:37:44,473 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:37:45,460 INFO L134 CoverageAnalysis]: Checked inductivity of 21840 backedges. 114 proven. 198 refuted. 0 times theorem prover too weak. 21528 trivial. 0 not checked. [2023-11-19 07:37:45,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:37:45,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984768277] [2023-11-19 07:37:45,461 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:37:45,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239471925] [2023-11-19 07:37:45,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239471925] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:37:45,462 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:37:45,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2023-11-19 07:37:45,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503847883] [2023-11-19 07:37:45,463 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:37:45,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-19 07:37:45,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:37:45,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-19 07:37:45,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2023-11-19 07:37:45,468 INFO L87 Difference]: Start difference. First operand 938 states and 1642 transitions. Second operand has 18 states, 18 states have (on average 13.722222222222221) internal successors, (247), 18 states have internal predecessors, (247), 9 states have call successors, (171), 5 states have call predecessors, (171), 7 states have return successors, (172), 9 states have call predecessors, (172), 9 states have call successors, (172) [2023-11-19 07:37:49,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:37:49,413 INFO L93 Difference]: Finished difference Result 4909 states and 8521 transitions. [2023-11-19 07:37:49,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-19 07:37:49,414 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 13.722222222222221) internal successors, (247), 18 states have internal predecessors, (247), 9 states have call successors, (171), 5 states have call predecessors, (171), 7 states have return successors, (172), 9 states have call predecessors, (172), 9 states have call successors, (172) Word has length 685 [2023-11-19 07:37:49,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:37:49,447 INFO L225 Difference]: With dead ends: 4909 [2023-11-19 07:37:49,448 INFO L226 Difference]: Without dead ends: 3974 [2023-11-19 07:37:49,454 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1400 GetRequests, 1356 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=630, Invalid=1440, Unknown=0, NotChecked=0, Total=2070 [2023-11-19 07:37:49,455 INFO L413 NwaCegarLoop]: 478 mSDtfsCounter, 3802 mSDsluCounter, 2070 mSDsCounter, 0 mSdLazyCounter, 1681 mSolverCounterSat, 967 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3840 SdHoareTripleChecker+Valid, 2548 SdHoareTripleChecker+Invalid, 2648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 967 IncrementalHoareTripleChecker+Valid, 1681 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-11-19 07:37:49,457 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3840 Valid, 2548 Invalid, 2648 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [967 Valid, 1681 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-11-19 07:37:49,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3974 states. [2023-11-19 07:37:49,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3974 to 1241. [2023-11-19 07:37:49,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1241 states, 948 states have (on average 1.6782700421940928) internal successors, (1591), 952 states have internal predecessors, (1591), 277 states have call successors, (277), 15 states have call predecessors, (277), 15 states have return successors, (277), 273 states have call predecessors, (277), 277 states have call successors, (277) [2023-11-19 07:37:49,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1241 states to 1241 states and 2145 transitions. [2023-11-19 07:37:49,736 INFO L78 Accepts]: Start accepts. Automaton has 1241 states and 2145 transitions. Word has length 685 [2023-11-19 07:37:49,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:37:49,737 INFO L495 AbstractCegarLoop]: Abstraction has 1241 states and 2145 transitions. [2023-11-19 07:37:49,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 13.722222222222221) internal successors, (247), 18 states have internal predecessors, (247), 9 states have call successors, (171), 5 states have call predecessors, (171), 7 states have return successors, (172), 9 states have call predecessors, (172), 9 states have call successors, (172) [2023-11-19 07:37:49,738 INFO L276 IsEmpty]: Start isEmpty. Operand 1241 states and 2145 transitions. [2023-11-19 07:37:49,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 686 [2023-11-19 07:37:49,746 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:37:49,747 INFO L195 NwaCegarLoop]: trace histogram [105, 105, 105, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:37:49,772 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cab7a20-46bb-4401-b231-c951fb644f71/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 07:37:49,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cab7a20-46bb-4401-b231-c951fb644f71/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:37:49,960 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:37:49,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:37:49,961 INFO L85 PathProgramCache]: Analyzing trace with hash 1507492223, now seen corresponding path program 1 times [2023-11-19 07:37:49,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:37:49,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27243709] [2023-11-19 07:37:49,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:49,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:37:50,089 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:37:50,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1245804324] [2023-11-19 07:37:50,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:50,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:37:50,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cab7a20-46bb-4401-b231-c951fb644f71/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:37:50,091 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cab7a20-46bb-4401-b231-c951fb644f71/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:37:50,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cab7a20-46bb-4401-b231-c951fb644f71/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 07:37:50,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:50,642 INFO L262 TraceCheckSpWp]: Trace formula consists of 1647 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:37:50,657 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:37:51,350 INFO L134 CoverageAnalysis]: Checked inductivity of 21840 backedges. 10914 proven. 171 refuted. 0 times theorem prover too weak. 10755 trivial. 0 not checked. [2023-11-19 07:37:51,350 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:37:51,901 INFO L134 CoverageAnalysis]: Checked inductivity of 21840 backedges. 141 proven. 171 refuted. 0 times theorem prover too weak. 21528 trivial. 0 not checked. [2023-11-19 07:37:51,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:37:51,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27243709] [2023-11-19 07:37:51,901 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:37:51,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245804324] [2023-11-19 07:37:51,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245804324] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:37:51,902 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:37:51,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-19 07:37:51,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822829213] [2023-11-19 07:37:51,903 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:37:51,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 07:37:51,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:37:51,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 07:37:51,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:37:51,907 INFO L87 Difference]: Start difference. First operand 1241 states and 2145 transitions. Second operand has 7 states, 7 states have (on average 24.571428571428573) internal successors, (172), 7 states have internal predecessors, (172), 2 states have call successors, (162), 2 states have call predecessors, (162), 4 states have return successors, (163), 2 states have call predecessors, (163), 2 states have call successors, (163) [2023-11-19 07:37:52,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:37:52,664 INFO L93 Difference]: Finished difference Result 2116 states and 3665 transitions. [2023-11-19 07:37:52,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-19 07:37:52,665 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.571428571428573) internal successors, (172), 7 states have internal predecessors, (172), 2 states have call successors, (162), 2 states have call predecessors, (162), 4 states have return successors, (163), 2 states have call predecessors, (163), 2 states have call successors, (163) Word has length 685 [2023-11-19 07:37:52,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:37:52,674 INFO L225 Difference]: With dead ends: 2116 [2023-11-19 07:37:52,674 INFO L226 Difference]: Without dead ends: 878 [2023-11-19 07:37:52,678 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1372 GetRequests, 1362 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-19 07:37:52,680 INFO L413 NwaCegarLoop]: 493 mSDtfsCounter, 704 mSDsluCounter, 775 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 750 SdHoareTripleChecker+Valid, 1268 SdHoareTripleChecker+Invalid, 659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-19 07:37:52,681 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [750 Valid, 1268 Invalid, 659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 544 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-19 07:37:52,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 878 states. [2023-11-19 07:37:52,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 878 to 866. [2023-11-19 07:37:52,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 668 states have (on average 1.6751497005988023) internal successors, (1119), 670 states have internal predecessors, (1119), 187 states have call successors, (187), 10 states have call predecessors, (187), 10 states have return successors, (187), 185 states have call predecessors, (187), 187 states have call successors, (187) [2023-11-19 07:37:52,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 1493 transitions. [2023-11-19 07:37:52,854 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 1493 transitions. Word has length 685 [2023-11-19 07:37:52,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:37:52,855 INFO L495 AbstractCegarLoop]: Abstraction has 866 states and 1493 transitions. [2023-11-19 07:37:52,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.571428571428573) internal successors, (172), 7 states have internal predecessors, (172), 2 states have call successors, (162), 2 states have call predecessors, (162), 4 states have return successors, (163), 2 states have call predecessors, (163), 2 states have call successors, (163) [2023-11-19 07:37:52,856 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 1493 transitions. [2023-11-19 07:37:52,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 686 [2023-11-19 07:37:52,865 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:37:52,866 INFO L195 NwaCegarLoop]: trace histogram [105, 105, 105, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:37:52,898 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cab7a20-46bb-4401-b231-c951fb644f71/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 07:37:53,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cab7a20-46bb-4401-b231-c951fb644f71/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:37:53,090 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:37:53,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:37:53,091 INFO L85 PathProgramCache]: Analyzing trace with hash 341193339, now seen corresponding path program 1 times [2023-11-19 07:37:53,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:37:53,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785900859] [2023-11-19 07:37:53,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:53,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:37:53,199 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:37:53,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1469256076] [2023-11-19 07:37:53,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:53,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:37:53,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cab7a20-46bb-4401-b231-c951fb644f71/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:37:53,201 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cab7a20-46bb-4401-b231-c951fb644f71/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:37:53,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cab7a20-46bb-4401-b231-c951fb644f71/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 07:37:53,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:53,806 INFO L262 TraceCheckSpWp]: Trace formula consists of 1645 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-19 07:37:53,822 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:37:55,048 INFO L134 CoverageAnalysis]: Checked inductivity of 21840 backedges. 14375 proven. 261 refuted. 0 times theorem prover too weak. 7204 trivial. 0 not checked. [2023-11-19 07:37:55,049 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:37:56,313 INFO L134 CoverageAnalysis]: Checked inductivity of 21840 backedges. 357 proven. 264 refuted. 0 times theorem prover too weak. 21219 trivial. 0 not checked. [2023-11-19 07:37:56,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:37:56,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785900859] [2023-11-19 07:37:56,313 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:37:56,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469256076] [2023-11-19 07:37:56,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469256076] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:37:56,314 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:37:56,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2023-11-19 07:37:56,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255795678] [2023-11-19 07:37:56,315 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:37:56,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-19 07:37:56,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:37:56,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-19 07:37:56,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2023-11-19 07:37:56,320 INFO L87 Difference]: Start difference. First operand 866 states and 1493 transitions. Second operand has 18 states, 18 states have (on average 14.277777777777779) internal successors, (257), 18 states have internal predecessors, (257), 5 states have call successors, (166), 3 states have call predecessors, (166), 7 states have return successors, (167), 5 states have call predecessors, (167), 5 states have call successors, (167) [2023-11-19 07:37:58,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:37:58,783 INFO L93 Difference]: Finished difference Result 2335 states and 4003 transitions. [2023-11-19 07:37:58,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-19 07:37:58,785 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 14.277777777777779) internal successors, (257), 18 states have internal predecessors, (257), 5 states have call successors, (166), 3 states have call predecessors, (166), 7 states have return successors, (167), 5 states have call predecessors, (167), 5 states have call successors, (167) Word has length 685 [2023-11-19 07:37:58,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:37:58,799 INFO L225 Difference]: With dead ends: 2335 [2023-11-19 07:37:58,799 INFO L226 Difference]: Without dead ends: 1472 [2023-11-19 07:37:58,802 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1383 GetRequests, 1353 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=341, Invalid=651, Unknown=0, NotChecked=0, Total=992 [2023-11-19 07:37:58,804 INFO L413 NwaCegarLoop]: 478 mSDtfsCounter, 4365 mSDsluCounter, 2224 mSDsCounter, 0 mSdLazyCounter, 1535 mSolverCounterSat, 1207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4441 SdHoareTripleChecker+Valid, 2702 SdHoareTripleChecker+Invalid, 2742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1207 IncrementalHoareTripleChecker+Valid, 1535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:37:58,804 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4441 Valid, 2702 Invalid, 2742 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1207 Valid, 1535 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-11-19 07:37:58,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1472 states. [2023-11-19 07:37:58,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1472 to 1084. [2023-11-19 07:37:58,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1084 states, 859 states have (on average 1.6868451688009314) internal successors, (1449), 862 states have internal predecessors, (1449), 211 states have call successors, (211), 13 states have call predecessors, (211), 13 states have return successors, (211), 208 states have call predecessors, (211), 211 states have call successors, (211) [2023-11-19 07:37:58,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1084 states to 1084 states and 1871 transitions. [2023-11-19 07:37:58,989 INFO L78 Accepts]: Start accepts. Automaton has 1084 states and 1871 transitions. Word has length 685 [2023-11-19 07:37:58,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:37:58,990 INFO L495 AbstractCegarLoop]: Abstraction has 1084 states and 1871 transitions. [2023-11-19 07:37:58,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 14.277777777777779) internal successors, (257), 18 states have internal predecessors, (257), 5 states have call successors, (166), 3 states have call predecessors, (166), 7 states have return successors, (167), 5 states have call predecessors, (167), 5 states have call successors, (167) [2023-11-19 07:37:58,991 INFO L276 IsEmpty]: Start isEmpty. Operand 1084 states and 1871 transitions. [2023-11-19 07:37:58,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 687 [2023-11-19 07:37:58,999 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:37:59,000 INFO L195 NwaCegarLoop]: trace histogram [105, 105, 105, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:37:59,029 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cab7a20-46bb-4401-b231-c951fb644f71/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-19 07:37:59,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cab7a20-46bb-4401-b231-c951fb644f71/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:37:59,219 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:37:59,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:37:59,220 INFO L85 PathProgramCache]: Analyzing trace with hash -1270263260, now seen corresponding path program 1 times [2023-11-19 07:37:59,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:37:59,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500223609] [2023-11-19 07:37:59,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:59,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:37:59,329 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:37:59,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1727032263] [2023-11-19 07:37:59,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:59,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:37:59,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cab7a20-46bb-4401-b231-c951fb644f71/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:37:59,335 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cab7a20-46bb-4401-b231-c951fb644f71/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:37:59,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cab7a20-46bb-4401-b231-c951fb644f71/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 07:37:59,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:59,949 INFO L262 TraceCheckSpWp]: Trace formula consists of 1648 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:37:59,962 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:38:00,233 INFO L134 CoverageAnalysis]: Checked inductivity of 21840 backedges. 4704 proven. 36 refuted. 0 times theorem prover too weak. 17100 trivial. 0 not checked. [2023-11-19 07:38:00,233 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:38:00,698 INFO L134 CoverageAnalysis]: Checked inductivity of 21840 backedges. 276 proven. 36 refuted. 0 times theorem prover too weak. 21528 trivial. 0 not checked. [2023-11-19 07:38:00,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:38:00,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500223609] [2023-11-19 07:38:00,699 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:38:00,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727032263] [2023-11-19 07:38:00,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727032263] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:38:00,699 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:38:00,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-11-19 07:38:00,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492557707] [2023-11-19 07:38:00,700 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:38:00,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 07:38:00,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:38:00,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 07:38:00,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:38:00,705 INFO L87 Difference]: Start difference. First operand 1084 states and 1871 transitions. Second operand has 8 states, 8 states have (on average 29.875) internal successors, (239), 8 states have internal predecessors, (239), 3 states have call successors, (117), 2 states have call predecessors, (117), 4 states have return successors, (118), 3 states have call predecessors, (118), 3 states have call successors, (118) [2023-11-19 07:38:01,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:38:01,589 INFO L93 Difference]: Finished difference Result 2183 states and 3756 transitions. [2023-11-19 07:38:01,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 07:38:01,590 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 29.875) internal successors, (239), 8 states have internal predecessors, (239), 3 states have call successors, (117), 2 states have call predecessors, (117), 4 states have return successors, (118), 3 states have call predecessors, (118), 3 states have call successors, (118) Word has length 686 [2023-11-19 07:38:01,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:38:01,599 INFO L225 Difference]: With dead ends: 2183 [2023-11-19 07:38:01,599 INFO L226 Difference]: Without dead ends: 1102 [2023-11-19 07:38:01,602 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1374 GetRequests, 1364 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2023-11-19 07:38:01,604 INFO L413 NwaCegarLoop]: 494 mSDtfsCounter, 750 mSDsluCounter, 777 mSDsCounter, 0 mSdLazyCounter, 535 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 842 SdHoareTripleChecker+Valid, 1271 SdHoareTripleChecker+Invalid, 737 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-19 07:38:01,604 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [842 Valid, 1271 Invalid, 737 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 535 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-19 07:38:01,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1102 states. [2023-11-19 07:38:01,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1102 to 1088. [2023-11-19 07:38:01,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1088 states, 862 states have (on average 1.6751740139211138) internal successors, (1444), 865 states have internal predecessors, (1444), 211 states have call successors, (211), 14 states have call predecessors, (211), 14 states have return successors, (211), 208 states have call predecessors, (211), 211 states have call successors, (211) [2023-11-19 07:38:01,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1088 states to 1088 states and 1866 transitions. [2023-11-19 07:38:01,743 INFO L78 Accepts]: Start accepts. Automaton has 1088 states and 1866 transitions. Word has length 686 [2023-11-19 07:38:01,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:38:01,744 INFO L495 AbstractCegarLoop]: Abstraction has 1088 states and 1866 transitions. [2023-11-19 07:38:01,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 29.875) internal successors, (239), 8 states have internal predecessors, (239), 3 states have call successors, (117), 2 states have call predecessors, (117), 4 states have return successors, (118), 3 states have call predecessors, (118), 3 states have call successors, (118) [2023-11-19 07:38:01,745 INFO L276 IsEmpty]: Start isEmpty. Operand 1088 states and 1866 transitions. [2023-11-19 07:38:01,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 688 [2023-11-19 07:38:01,753 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:38:01,754 INFO L195 NwaCegarLoop]: trace histogram [105, 105, 105, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:38:01,783 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cab7a20-46bb-4401-b231-c951fb644f71/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-19 07:38:01,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cab7a20-46bb-4401-b231-c951fb644f71/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:38:01,978 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:38:01,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:38:01,979 INFO L85 PathProgramCache]: Analyzing trace with hash -240454321, now seen corresponding path program 1 times [2023-11-19 07:38:01,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:38:01,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150711434] [2023-11-19 07:38:01,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:38:01,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:38:02,069 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:38:02,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1406921923] [2023-11-19 07:38:02,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:38:02,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:38:02,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cab7a20-46bb-4401-b231-c951fb644f71/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:38:02,071 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cab7a20-46bb-4401-b231-c951fb644f71/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:38:02,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cab7a20-46bb-4401-b231-c951fb644f71/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-19 07:38:02,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:38:02,678 INFO L262 TraceCheckSpWp]: Trace formula consists of 1647 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:38:02,705 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:38:03,235 INFO L134 CoverageAnalysis]: Checked inductivity of 21840 backedges. 9968 proven. 204 refuted. 0 times theorem prover too weak. 11668 trivial. 0 not checked. [2023-11-19 07:38:03,236 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:38:03,750 INFO L134 CoverageAnalysis]: Checked inductivity of 21840 backedges. 108 proven. 204 refuted. 0 times theorem prover too weak. 21528 trivial. 0 not checked. [2023-11-19 07:38:03,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:38:03,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150711434] [2023-11-19 07:38:03,751 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:38:03,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406921923] [2023-11-19 07:38:03,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406921923] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:38:03,752 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:38:03,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-11-19 07:38:03,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356573256] [2023-11-19 07:38:03,753 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:38:03,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 07:38:03,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:38:03,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 07:38:03,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:38:03,757 INFO L87 Difference]: Start difference. First operand 1088 states and 1866 transitions. Second operand has 8 states, 8 states have (on average 28.5) internal successors, (228), 8 states have internal predecessors, (228), 3 states have call successors, (173), 2 states have call predecessors, (173), 4 states have return successors, (174), 3 states have call predecessors, (174), 3 states have call successors, (174) [2023-11-19 07:38:04,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:38:04,528 INFO L93 Difference]: Finished difference Result 2195 states and 3749 transitions. [2023-11-19 07:38:04,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 07:38:04,529 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 28.5) internal successors, (228), 8 states have internal predecessors, (228), 3 states have call successors, (173), 2 states have call predecessors, (173), 4 states have return successors, (174), 3 states have call predecessors, (174), 3 states have call successors, (174) Word has length 687 [2023-11-19 07:38:04,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:38:04,539 INFO L225 Difference]: With dead ends: 2195 [2023-11-19 07:38:04,539 INFO L226 Difference]: Without dead ends: 1110 [2023-11-19 07:38:04,543 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1376 GetRequests, 1366 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2023-11-19 07:38:04,545 INFO L413 NwaCegarLoop]: 482 mSDtfsCounter, 714 mSDsluCounter, 753 mSDsCounter, 0 mSdLazyCounter, 565 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 750 SdHoareTripleChecker+Valid, 1235 SdHoareTripleChecker+Invalid, 655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-19 07:38:04,546 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [750 Valid, 1235 Invalid, 655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 565 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-19 07:38:04,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1110 states. [2023-11-19 07:38:04,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1110 to 1096. [2023-11-19 07:38:04,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1096 states, 868 states have (on average 1.663594470046083) internal successors, (1444), 871 states have internal predecessors, (1444), 211 states have call successors, (211), 16 states have call predecessors, (211), 16 states have return successors, (211), 208 states have call predecessors, (211), 211 states have call successors, (211) [2023-11-19 07:38:04,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1096 states to 1096 states and 1866 transitions. [2023-11-19 07:38:04,691 INFO L78 Accepts]: Start accepts. Automaton has 1096 states and 1866 transitions. Word has length 687 [2023-11-19 07:38:04,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:38:04,693 INFO L495 AbstractCegarLoop]: Abstraction has 1096 states and 1866 transitions. [2023-11-19 07:38:04,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 28.5) internal successors, (228), 8 states have internal predecessors, (228), 3 states have call successors, (173), 2 states have call predecessors, (173), 4 states have return successors, (174), 3 states have call predecessors, (174), 3 states have call successors, (174) [2023-11-19 07:38:04,694 INFO L276 IsEmpty]: Start isEmpty. Operand 1096 states and 1866 transitions. [2023-11-19 07:38:04,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 689 [2023-11-19 07:38:04,702 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:38:04,703 INFO L195 NwaCegarLoop]: trace histogram [105, 105, 105, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:38:04,731 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cab7a20-46bb-4401-b231-c951fb644f71/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-19 07:38:04,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cab7a20-46bb-4401-b231-c951fb644f71/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:38:04,924 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:38:04,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:38:04,925 INFO L85 PathProgramCache]: Analyzing trace with hash -1420918998, now seen corresponding path program 1 times [2023-11-19 07:38:04,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:38:04,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633269117] [2023-11-19 07:38:04,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:38:04,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:38:05,019 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:38:05,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2141173146] [2023-11-19 07:38:05,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:38:05,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:38:05,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cab7a20-46bb-4401-b231-c951fb644f71/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:38:05,021 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cab7a20-46bb-4401-b231-c951fb644f71/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:38:05,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cab7a20-46bb-4401-b231-c951fb644f71/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-19 07:38:05,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:38:05,681 INFO L262 TraceCheckSpWp]: Trace formula consists of 1648 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 07:38:05,698 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:38:05,753 INFO L134 CoverageAnalysis]: Checked inductivity of 21840 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21840 trivial. 0 not checked. [2023-11-19 07:38:05,753 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:38:05,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:38:05,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633269117] [2023-11-19 07:38:05,754 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:38:05,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141173146] [2023-11-19 07:38:05,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141173146] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:38:05,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:38:05,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:38:05,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382147964] [2023-11-19 07:38:05,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:38:05,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:38:05,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:38:05,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:38:05,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:38:05,760 INFO L87 Difference]: Start difference. First operand 1096 states and 1866 transitions. Second operand has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 3 states have internal predecessors, (166), 1 states have call successors, (105), 1 states have call predecessors, (105), 1 states have return successors, (105), 1 states have call predecessors, (105), 1 states have call successors, (105) [2023-11-19 07:38:05,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:38:05,993 INFO L93 Difference]: Finished difference Result 2668 states and 4532 transitions. [2023-11-19 07:38:05,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:38:05,996 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 3 states have internal predecessors, (166), 1 states have call successors, (105), 1 states have call predecessors, (105), 1 states have return successors, (105), 1 states have call predecessors, (105), 1 states have call successors, (105) Word has length 688 [2023-11-19 07:38:05,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:38:06,008 INFO L225 Difference]: With dead ends: 2668 [2023-11-19 07:38:06,008 INFO L226 Difference]: Without dead ends: 1575 [2023-11-19 07:38:06,012 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 687 GetRequests, 686 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:38:06,012 INFO L413 NwaCegarLoop]: 600 mSDtfsCounter, 391 mSDsluCounter, 588 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 391 SdHoareTripleChecker+Valid, 1188 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:38:06,013 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [391 Valid, 1188 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:38:06,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1575 states. [2023-11-19 07:38:06,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1575 to 1572. [2023-11-19 07:38:06,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1572 states, 1247 states have (on average 1.6559743384121892) internal successors, (2065), 1252 states have internal predecessors, (2065), 299 states have call successors, (299), 25 states have call predecessors, (299), 25 states have return successors, (299), 294 states have call predecessors, (299), 299 states have call successors, (299) [2023-11-19 07:38:06,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1572 states to 1572 states and 2663 transitions. [2023-11-19 07:38:06,223 INFO L78 Accepts]: Start accepts. Automaton has 1572 states and 2663 transitions. Word has length 688 [2023-11-19 07:38:06,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:38:06,225 INFO L495 AbstractCegarLoop]: Abstraction has 1572 states and 2663 transitions. [2023-11-19 07:38:06,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 3 states have internal predecessors, (166), 1 states have call successors, (105), 1 states have call predecessors, (105), 1 states have return successors, (105), 1 states have call predecessors, (105), 1 states have call successors, (105) [2023-11-19 07:38:06,226 INFO L276 IsEmpty]: Start isEmpty. Operand 1572 states and 2663 transitions. [2023-11-19 07:38:06,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 690 [2023-11-19 07:38:06,235 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:38:06,236 INFO L195 NwaCegarLoop]: trace histogram [105, 105, 105, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:38:06,264 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cab7a20-46bb-4401-b231-c951fb644f71/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-19 07:38:06,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cab7a20-46bb-4401-b231-c951fb644f71/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-19 07:38:06,458 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:38:06,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:38:06,459 INFO L85 PathProgramCache]: Analyzing trace with hash 1185081416, now seen corresponding path program 1 times [2023-11-19 07:38:06,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:38:06,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633770568] [2023-11-19 07:38:06,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:38:06,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:38:06,550 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:38:06,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2015227062] [2023-11-19 07:38:06,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:38:06,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:38:06,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cab7a20-46bb-4401-b231-c951fb644f71/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:38:06,552 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cab7a20-46bb-4401-b231-c951fb644f71/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:38:06,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cab7a20-46bb-4401-b231-c951fb644f71/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-19 07:38:07,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:38:07,246 INFO L262 TraceCheckSpWp]: Trace formula consists of 1650 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:38:07,261 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:38:07,940 INFO L134 CoverageAnalysis]: Checked inductivity of 21840 backedges. 8672 proven. 228 refuted. 0 times theorem prover too weak. 12940 trivial. 0 not checked. [2023-11-19 07:38:07,940 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:38:08,483 INFO L134 CoverageAnalysis]: Checked inductivity of 21840 backedges. 84 proven. 228 refuted. 0 times theorem prover too weak. 21528 trivial. 0 not checked. [2023-11-19 07:38:08,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:38:08,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633770568] [2023-11-19 07:38:08,484 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:38:08,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015227062] [2023-11-19 07:38:08,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015227062] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:38:08,484 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:38:08,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-11-19 07:38:08,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090998704] [2023-11-19 07:38:08,485 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:38:08,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 07:38:08,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:38:08,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 07:38:08,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:38:08,501 INFO L87 Difference]: Start difference. First operand 1572 states and 2663 transitions. Second operand has 8 states, 8 states have (on average 27.875) internal successors, (223), 8 states have internal predecessors, (223), 3 states have call successors, (181), 2 states have call predecessors, (181), 4 states have return successors, (182), 3 states have call predecessors, (182), 3 states have call successors, (182) [2023-11-19 07:38:09,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:38:09,470 INFO L93 Difference]: Finished difference Result 3189 states and 5365 transitions. [2023-11-19 07:38:09,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 07:38:09,472 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 27.875) internal successors, (223), 8 states have internal predecessors, (223), 3 states have call successors, (181), 2 states have call predecessors, (181), 4 states have return successors, (182), 3 states have call predecessors, (182), 3 states have call successors, (182) Word has length 689 [2023-11-19 07:38:09,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:38:09,488 INFO L225 Difference]: With dead ends: 3189 [2023-11-19 07:38:09,488 INFO L226 Difference]: Without dead ends: 1620 [2023-11-19 07:38:09,493 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1380 GetRequests, 1370 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2023-11-19 07:38:09,494 INFO L413 NwaCegarLoop]: 462 mSDtfsCounter, 716 mSDsluCounter, 714 mSDsCounter, 0 mSdLazyCounter, 619 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 744 SdHoareTripleChecker+Valid, 1176 SdHoareTripleChecker+Invalid, 686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 619 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-19 07:38:09,495 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [744 Valid, 1176 Invalid, 686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 619 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-19 07:38:09,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1620 states. [2023-11-19 07:38:09,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1620 to 1596. [2023-11-19 07:38:09,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1596 states, 1265 states have (on average 1.6450592885375495) internal successors, (2081), 1270 states have internal predecessors, (2081), 299 states have call successors, (299), 31 states have call predecessors, (299), 31 states have return successors, (299), 294 states have call predecessors, (299), 299 states have call successors, (299) [2023-11-19 07:38:09,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1596 states to 1596 states and 2679 transitions. [2023-11-19 07:38:09,742 INFO L78 Accepts]: Start accepts. Automaton has 1596 states and 2679 transitions. Word has length 689 [2023-11-19 07:38:09,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:38:09,744 INFO L495 AbstractCegarLoop]: Abstraction has 1596 states and 2679 transitions. [2023-11-19 07:38:09,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 27.875) internal successors, (223), 8 states have internal predecessors, (223), 3 states have call successors, (181), 2 states have call predecessors, (181), 4 states have return successors, (182), 3 states have call predecessors, (182), 3 states have call successors, (182) [2023-11-19 07:38:09,745 INFO L276 IsEmpty]: Start isEmpty. Operand 1596 states and 2679 transitions. [2023-11-19 07:38:09,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 691 [2023-11-19 07:38:09,754 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:38:09,755 INFO L195 NwaCegarLoop]: trace histogram [105, 105, 105, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:38:09,780 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cab7a20-46bb-4401-b231-c951fb644f71/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-19 07:38:09,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cab7a20-46bb-4401-b231-c951fb644f71/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-19 07:38:09,970 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:38:09,970 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:38:09,970 INFO L85 PathProgramCache]: Analyzing trace with hash 666575754, now seen corresponding path program 1 times [2023-11-19 07:38:09,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:38:09,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064578476] [2023-11-19 07:38:09,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:38:09,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:38:10,061 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:38:10,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1720759095] [2023-11-19 07:38:10,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:38:10,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:38:10,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cab7a20-46bb-4401-b231-c951fb644f71/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:38:10,064 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cab7a20-46bb-4401-b231-c951fb644f71/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:38:10,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cab7a20-46bb-4401-b231-c951fb644f71/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-19 07:38:10,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:38:10,759 INFO L262 TraceCheckSpWp]: Trace formula consists of 1651 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-19 07:38:10,773 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:38:10,800 INFO L134 CoverageAnalysis]: Checked inductivity of 21840 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21840 trivial. 0 not checked. [2023-11-19 07:38:10,800 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:38:10,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:38:10,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064578476] [2023-11-19 07:38:10,801 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:38:10,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720759095] [2023-11-19 07:38:10,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720759095] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:38:10,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:38:10,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:38:10,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317573799] [2023-11-19 07:38:10,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:38:10,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:38:10,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:38:10,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:38:10,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:38:10,806 INFO L87 Difference]: Start difference. First operand 1596 states and 2679 transitions. Second operand has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 1 states have call successors, (105), 1 states have call predecessors, (105), 1 states have return successors, (105), 1 states have call predecessors, (105), 1 states have call successors, (105) [2023-11-19 07:38:11,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:38:11,004 INFO L93 Difference]: Finished difference Result 3199 states and 5375 transitions. [2023-11-19 07:38:11,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:38:11,005 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 1 states have call successors, (105), 1 states have call predecessors, (105), 1 states have return successors, (105), 1 states have call predecessors, (105), 1 states have call successors, (105) Word has length 690 [2023-11-19 07:38:11,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:38:11,017 INFO L225 Difference]: With dead ends: 3199 [2023-11-19 07:38:11,017 INFO L226 Difference]: Without dead ends: 1606 [2023-11-19 07:38:11,022 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 689 GetRequests, 688 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:38:11,023 INFO L413 NwaCegarLoop]: 601 mSDtfsCounter, 0 mSDsluCounter, 595 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1196 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:38:11,023 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1196 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:38:11,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1606 states. [2023-11-19 07:38:11,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1606 to 1606. [2023-11-19 07:38:11,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1606 states, 1275 states have (on average 1.64) internal successors, (2091), 1280 states have internal predecessors, (2091), 299 states have call successors, (299), 31 states have call predecessors, (299), 31 states have return successors, (299), 294 states have call predecessors, (299), 299 states have call successors, (299) [2023-11-19 07:38:11,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1606 states to 1606 states and 2689 transitions. [2023-11-19 07:38:11,303 INFO L78 Accepts]: Start accepts. Automaton has 1606 states and 2689 transitions. Word has length 690 [2023-11-19 07:38:11,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:38:11,304 INFO L495 AbstractCegarLoop]: Abstraction has 1606 states and 2689 transitions. [2023-11-19 07:38:11,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 1 states have call successors, (105), 1 states have call predecessors, (105), 1 states have return successors, (105), 1 states have call predecessors, (105), 1 states have call successors, (105) [2023-11-19 07:38:11,305 INFO L276 IsEmpty]: Start isEmpty. Operand 1606 states and 2689 transitions. [2023-11-19 07:38:11,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 691 [2023-11-19 07:38:11,314 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:38:11,315 INFO L195 NwaCegarLoop]: trace histogram [105, 105, 105, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:38:11,346 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cab7a20-46bb-4401-b231-c951fb644f71/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-19 07:38:11,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cab7a20-46bb-4401-b231-c951fb644f71/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-19 07:38:11,538 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:38:11,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:38:11,539 INFO L85 PathProgramCache]: Analyzing trace with hash -287364404, now seen corresponding path program 1 times [2023-11-19 07:38:11,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:38:11,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923457353] [2023-11-19 07:38:11,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:38:11,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:38:11,631 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:38:11,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [568037178] [2023-11-19 07:38:11,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:38:11,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:38:11,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cab7a20-46bb-4401-b231-c951fb644f71/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:38:11,633 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cab7a20-46bb-4401-b231-c951fb644f71/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:38:11,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cab7a20-46bb-4401-b231-c951fb644f71/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-19 07:38:12,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:38:12,307 INFO L262 TraceCheckSpWp]: Trace formula consists of 1651 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-19 07:38:12,318 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:38:13,058 INFO L134 CoverageAnalysis]: Checked inductivity of 21840 backedges. 8672 proven. 228 refuted. 0 times theorem prover too weak. 12940 trivial. 0 not checked. [2023-11-19 07:38:13,058 INFO L327 TraceCheckSpWp]: Computing backward predicates...