./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-94.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_8b818246-d398-4f82-9faa-539be9b2dbf5/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b818246-d398-4f82-9faa-539be9b2dbf5/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_8b818246-d398-4f82-9faa-539be9b2dbf5/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b818246-d398-4f82-9faa-539be9b2dbf5/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-94.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b818246-d398-4f82-9faa-539be9b2dbf5/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_8b818246-d398-4f82-9faa-539be9b2dbf5/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 6feca5d4270fedbde3a8e3d6dcd4bcf83513724a215067edc4c46300cba8b69c --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:45:50,972 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:45:51,074 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b818246-d398-4f82-9faa-539be9b2dbf5/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 07:45:51,081 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:45:51,082 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:45:51,111 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:45:51,112 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:45:51,113 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:45:51,114 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:45:51,115 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:45:51,116 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:45:51,117 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:45:51,117 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:45:51,118 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:45:51,119 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:45:51,120 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:45:51,120 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:45:51,121 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:45:51,122 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:45:51,122 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:45:51,123 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:45:51,124 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:45:51,124 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:45:51,125 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:45:51,126 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:45:51,126 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:45:51,127 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:45:51,128 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:45:51,128 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:45:51,129 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:45:51,129 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:45:51,130 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:45:51,131 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:45:51,131 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:45:51,132 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:45:51,133 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:45:51,133 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:45:51,134 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:45:51,134 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:45:51,135 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_8b818246-d398-4f82-9faa-539be9b2dbf5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b818246-d398-4f82-9faa-539be9b2dbf5/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6feca5d4270fedbde3a8e3d6dcd4bcf83513724a215067edc4c46300cba8b69c [2023-11-19 07:45:51,466 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:45:51,504 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:45:51,508 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:45:51,510 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:45:51,511 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:45:51,513 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b818246-d398-4f82-9faa-539be9b2dbf5/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-94.i [2023-11-19 07:45:54,962 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:45:55,251 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:45:55,252 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b818246-d398-4f82-9faa-539be9b2dbf5/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-94.i [2023-11-19 07:45:55,267 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b818246-d398-4f82-9faa-539be9b2dbf5/bin/uautomizer-verify-uCwYo4JHxu/data/56623d0b3/906fb68a5f0542808facccd5f9521e01/FLAG30d28fc08 [2023-11-19 07:45:55,284 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b818246-d398-4f82-9faa-539be9b2dbf5/bin/uautomizer-verify-uCwYo4JHxu/data/56623d0b3/906fb68a5f0542808facccd5f9521e01 [2023-11-19 07:45:55,287 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:45:55,289 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:45:55,291 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:45:55,291 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:45:55,298 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:45:55,299 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:45:55" (1/1) ... [2023-11-19 07:45:55,300 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c88f00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:45:55, skipping insertion in model container [2023-11-19 07:45:55,300 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:45:55" (1/1) ... [2023-11-19 07:45:55,352 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:45:55,571 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_8b818246-d398-4f82-9faa-539be9b2dbf5/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-94.i[916,929] [2023-11-19 07:45:55,782 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:45:55,801 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:45:55,815 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_8b818246-d398-4f82-9faa-539be9b2dbf5/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-94.i[916,929] [2023-11-19 07:45:55,891 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:45:55,914 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:45:55,914 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:45:55 WrapperNode [2023-11-19 07:45:55,915 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:45:55,916 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:45:55,916 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:45:55,917 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:45:55,925 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:45:55" (1/1) ... [2023-11-19 07:45:55,950 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:45:55" (1/1) ... [2023-11-19 07:45:56,023 INFO L138 Inliner]: procedures = 26, calls = 96, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 625 [2023-11-19 07:45:56,024 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:45:56,025 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:45:56,025 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:45:56,025 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:45:56,038 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:45:55" (1/1) ... [2023-11-19 07:45:56,038 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:45:55" (1/1) ... [2023-11-19 07:45:56,047 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:45:55" (1/1) ... [2023-11-19 07:45:56,048 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:45:55" (1/1) ... [2023-11-19 07:45:56,109 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:45:55" (1/1) ... [2023-11-19 07:45:56,122 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:45:55" (1/1) ... [2023-11-19 07:45:56,128 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:45:55" (1/1) ... [2023-11-19 07:45:56,135 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:45:55" (1/1) ... [2023-11-19 07:45:56,147 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:45:56,148 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:45:56,149 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:45:56,149 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:45:56,150 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:45:55" (1/1) ... [2023-11-19 07:45:56,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:45:56,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b818246-d398-4f82-9faa-539be9b2dbf5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:45:56,198 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b818246-d398-4f82-9faa-539be9b2dbf5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:45:56,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b818246-d398-4f82-9faa-539be9b2dbf5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:45:56,251 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:45:56,251 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-19 07:45:56,252 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-19 07:45:56,252 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:45:56,252 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:45:56,252 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:45:56,407 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:45:56,410 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:45:57,409 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:45:57,426 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:45:57,426 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-19 07:45:57,439 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:45:57 BoogieIcfgContainer [2023-11-19 07:45:57,439 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:45:57,445 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:45:57,445 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:45:57,449 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:45:57,449 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:45:55" (1/3) ... [2023-11-19 07:45:57,450 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@747127ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:45:57, skipping insertion in model container [2023-11-19 07:45:57,450 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:45:55" (2/3) ... [2023-11-19 07:45:57,451 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@747127ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:45:57, skipping insertion in model container [2023-11-19 07:45:57,451 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:45:57" (3/3) ... [2023-11-19 07:45:57,453 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_fillercode_fillercodesize_ps-cn-250_file-94.i [2023-11-19 07:45:57,472 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:45:57,473 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 07:45:57,535 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:45:57,541 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;@7ad1fb28, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:45:57,541 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 07:45:57,546 INFO L276 IsEmpty]: Start isEmpty. Operand has 240 states, 154 states have (on average 1.5584415584415585) internal successors, (240), 155 states have internal predecessors, (240), 83 states have call successors, (83), 1 states have call predecessors, (83), 1 states have return successors, (83), 83 states have call predecessors, (83), 83 states have call successors, (83) [2023-11-19 07:45:57,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 523 [2023-11-19 07:45:57,581 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:45:57,582 INFO L195 NwaCegarLoop]: trace histogram [83, 83, 83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:45:57,583 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:45:57,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:45:57,591 INFO L85 PathProgramCache]: Analyzing trace with hash 124053131, now seen corresponding path program 1 times [2023-11-19 07:45:57,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:45:57,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793797413] [2023-11-19 07:45:57,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:45:57,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:45:57,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:45:58,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:45:58,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793797413] [2023-11-19 07:45:58,128 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-19 07:45:58,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020979878] [2023-11-19 07:45:58,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:45:58,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:45:58,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b818246-d398-4f82-9faa-539be9b2dbf5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:45:58,131 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b818246-d398-4f82-9faa-539be9b2dbf5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:45:58,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b818246-d398-4f82-9faa-539be9b2dbf5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:45:58,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:45:58,647 INFO L262 TraceCheckSpWp]: Trace formula consists of 1229 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-19 07:45:58,673 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:45:58,807 INFO L134 CoverageAnalysis]: Checked inductivity of 13612 backedges. 164 proven. 0 refuted. 0 times theorem prover too weak. 13448 trivial. 0 not checked. [2023-11-19 07:45:58,807 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:45:58,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020979878] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:45:58,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:45:58,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:45:58,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917863972] [2023-11-19 07:45:58,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:45:58,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 07:45:58,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:45:58,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 07:45:58,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 07:45:58,876 INFO L87 Difference]: Start difference. First operand has 240 states, 154 states have (on average 1.5584415584415585) internal successors, (240), 155 states have internal predecessors, (240), 83 states have call successors, (83), 1 states have call predecessors, (83), 1 states have return successors, (83), 83 states have call predecessors, (83), 83 states have call successors, (83) Second operand has 2 states, 2 states have (on average 56.0) internal successors, (112), 2 states have internal predecessors, (112), 2 states have call successors, (83), 2 states have call predecessors, (83), 1 states have return successors, (83), 1 states have call predecessors, (83), 2 states have call successors, (83) [2023-11-19 07:45:58,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:45:59,001 INFO L93 Difference]: Finished difference Result 473 states and 889 transitions. [2023-11-19 07:45:59,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 07:45:59,004 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 56.0) internal successors, (112), 2 states have internal predecessors, (112), 2 states have call successors, (83), 2 states have call predecessors, (83), 1 states have return successors, (83), 1 states have call predecessors, (83), 2 states have call successors, (83) Word has length 522 [2023-11-19 07:45:59,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:45:59,023 INFO L225 Difference]: With dead ends: 473 [2023-11-19 07:45:59,024 INFO L226 Difference]: Without dead ends: 236 [2023-11-19 07:45:59,035 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 521 GetRequests, 521 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 07:45:59,040 INFO L413 NwaCegarLoop]: 396 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, 396 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 07:45:59,042 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:45:59,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2023-11-19 07:45:59,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 236. [2023-11-19 07:45:59,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 151 states have (on average 1.5231788079470199) internal successors, (230), 151 states have internal predecessors, (230), 83 states have call successors, (83), 1 states have call predecessors, (83), 1 states have return successors, (83), 83 states have call predecessors, (83), 83 states have call successors, (83) [2023-11-19 07:45:59,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 396 transitions. [2023-11-19 07:45:59,154 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 396 transitions. Word has length 522 [2023-11-19 07:45:59,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:45:59,155 INFO L495 AbstractCegarLoop]: Abstraction has 236 states and 396 transitions. [2023-11-19 07:45:59,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 56.0) internal successors, (112), 2 states have internal predecessors, (112), 2 states have call successors, (83), 2 states have call predecessors, (83), 1 states have return successors, (83), 1 states have call predecessors, (83), 2 states have call successors, (83) [2023-11-19 07:45:59,169 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 396 transitions. [2023-11-19 07:45:59,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 523 [2023-11-19 07:45:59,193 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:45:59,194 INFO L195 NwaCegarLoop]: trace histogram [83, 83, 83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:45:59,225 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b818246-d398-4f82-9faa-539be9b2dbf5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 07:45:59,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b818246-d398-4f82-9faa-539be9b2dbf5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:45:59,425 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:45:59,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:45:59,427 INFO L85 PathProgramCache]: Analyzing trace with hash -1815308759, now seen corresponding path program 1 times [2023-11-19 07:45:59,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:45:59,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349358544] [2023-11-19 07:45:59,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:45:59,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:45:59,607 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:45:59,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [65945814] [2023-11-19 07:45:59,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:45:59,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:45:59,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b818246-d398-4f82-9faa-539be9b2dbf5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:45:59,609 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b818246-d398-4f82-9faa-539be9b2dbf5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:45:59,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b818246-d398-4f82-9faa-539be9b2dbf5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:46:00,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:46:00,047 INFO L262 TraceCheckSpWp]: Trace formula consists of 1229 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 07:46:00,064 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:46:00,255 INFO L134 CoverageAnalysis]: Checked inductivity of 13612 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13612 trivial. 0 not checked. [2023-11-19 07:46:00,256 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:46:00,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:46:00,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349358544] [2023-11-19 07:46:00,260 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:46:00,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65945814] [2023-11-19 07:46:00,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65945814] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:46:00,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:46:00,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 07:46:00,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078858833] [2023-11-19 07:46:00,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:46:00,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:46:00,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:46:00,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:46:00,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:46:00,270 INFO L87 Difference]: Start difference. First operand 236 states and 396 transitions. Second operand has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 1 states have call successors, (83), 1 states have call predecessors, (83), 1 states have return successors, (83), 1 states have call predecessors, (83), 1 states have call successors, (83) [2023-11-19 07:46:00,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:46:00,725 INFO L93 Difference]: Finished difference Result 709 states and 1193 transitions. [2023-11-19 07:46:00,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:46:00,726 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 1 states have call successors, (83), 1 states have call predecessors, (83), 1 states have return successors, (83), 1 states have call predecessors, (83), 1 states have call successors, (83) Word has length 522 [2023-11-19 07:46:00,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:46:00,739 INFO L225 Difference]: With dead ends: 709 [2023-11-19 07:46:00,739 INFO L226 Difference]: Without dead ends: 476 [2023-11-19 07:46:00,741 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 521 GetRequests, 519 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:46:00,743 INFO L413 NwaCegarLoop]: 467 mSDtfsCounter, 451 mSDsluCounter, 511 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 451 SdHoareTripleChecker+Valid, 978 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 07:46:00,744 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [451 Valid, 978 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 07:46:00,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2023-11-19 07:46:00,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 372. [2023-11-19 07:46:00,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 259 states have (on average 1.583011583011583) internal successors, (410), 260 states have internal predecessors, (410), 110 states have call successors, (110), 2 states have call predecessors, (110), 2 states have return successors, (110), 109 states have call predecessors, (110), 110 states have call successors, (110) [2023-11-19 07:46:00,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 630 transitions. [2023-11-19 07:46:00,823 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 630 transitions. Word has length 522 [2023-11-19 07:46:00,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:46:00,826 INFO L495 AbstractCegarLoop]: Abstraction has 372 states and 630 transitions. [2023-11-19 07:46:00,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 1 states have call successors, (83), 1 states have call predecessors, (83), 1 states have return successors, (83), 1 states have call predecessors, (83), 1 states have call successors, (83) [2023-11-19 07:46:00,827 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 630 transitions. [2023-11-19 07:46:00,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 523 [2023-11-19 07:46:00,833 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:46:00,834 INFO L195 NwaCegarLoop]: trace histogram [83, 83, 83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:46:00,864 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b818246-d398-4f82-9faa-539be9b2dbf5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:46:01,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b818246-d398-4f82-9faa-539be9b2dbf5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:46:01,049 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:46:01,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:46:01,050 INFO L85 PathProgramCache]: Analyzing trace with hash 1107851239, now seen corresponding path program 1 times [2023-11-19 07:46:01,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:46:01,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928623489] [2023-11-19 07:46:01,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:46:01,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:46:01,174 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:46:01,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1590104655] [2023-11-19 07:46:01,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:46:01,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:46:01,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b818246-d398-4f82-9faa-539be9b2dbf5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:46:01,181 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b818246-d398-4f82-9faa-539be9b2dbf5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:46:01,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b818246-d398-4f82-9faa-539be9b2dbf5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:46:01,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:46:01,575 INFO L262 TraceCheckSpWp]: Trace formula consists of 1227 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 07:46:01,630 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:46:02,461 INFO L134 CoverageAnalysis]: Checked inductivity of 13612 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13612 trivial. 0 not checked. [2023-11-19 07:46:02,461 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:46:02,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:46:02,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928623489] [2023-11-19 07:46:02,462 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:46:02,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590104655] [2023-11-19 07:46:02,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590104655] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:46:02,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:46:02,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:46:02,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661976503] [2023-11-19 07:46:02,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:46:02,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:46:02,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:46:02,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:46:02,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:46:02,467 INFO L87 Difference]: Start difference. First operand 372 states and 630 transitions. Second operand has 4 states, 4 states have (on average 27.5) internal successors, (110), 3 states have internal predecessors, (110), 1 states have call successors, (83), 1 states have call predecessors, (83), 1 states have return successors, (83), 1 states have call predecessors, (83), 1 states have call successors, (83) [2023-11-19 07:46:02,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:46:02,917 INFO L93 Difference]: Finished difference Result 1095 states and 1854 transitions. [2023-11-19 07:46:02,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:46:02,918 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 3 states have internal predecessors, (110), 1 states have call successors, (83), 1 states have call predecessors, (83), 1 states have return successors, (83), 1 states have call predecessors, (83), 1 states have call successors, (83) Word has length 522 [2023-11-19 07:46:02,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:46:02,929 INFO L225 Difference]: With dead ends: 1095 [2023-11-19 07:46:02,929 INFO L226 Difference]: Without dead ends: 726 [2023-11-19 07:46:02,931 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 521 GetRequests, 519 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:46:02,933 INFO L413 NwaCegarLoop]: 512 mSDtfsCounter, 472 mSDsluCounter, 586 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 472 SdHoareTripleChecker+Valid, 1098 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 07:46:02,934 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [472 Valid, 1098 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 07:46:02,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 726 states. [2023-11-19 07:46:03,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 726 to 721. [2023-11-19 07:46:03,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 721 states, 496 states have (on average 1.5745967741935485) internal successors, (781), 498 states have internal predecessors, (781), 220 states have call successors, (220), 4 states have call predecessors, (220), 4 states have return successors, (220), 218 states have call predecessors, (220), 220 states have call successors, (220) [2023-11-19 07:46:03,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 721 states to 721 states and 1221 transitions. [2023-11-19 07:46:03,121 INFO L78 Accepts]: Start accepts. Automaton has 721 states and 1221 transitions. Word has length 522 [2023-11-19 07:46:03,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:46:03,127 INFO L495 AbstractCegarLoop]: Abstraction has 721 states and 1221 transitions. [2023-11-19 07:46:03,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 3 states have internal predecessors, (110), 1 states have call successors, (83), 1 states have call predecessors, (83), 1 states have return successors, (83), 1 states have call predecessors, (83), 1 states have call successors, (83) [2023-11-19 07:46:03,128 INFO L276 IsEmpty]: Start isEmpty. Operand 721 states and 1221 transitions. [2023-11-19 07:46:03,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 524 [2023-11-19 07:46:03,137 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:46:03,138 INFO L195 NwaCegarLoop]: trace histogram [83, 83, 83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:46:03,173 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b818246-d398-4f82-9faa-539be9b2dbf5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 07:46:03,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b818246-d398-4f82-9faa-539be9b2dbf5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:46:03,353 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:46:03,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:46:03,354 INFO L85 PathProgramCache]: Analyzing trace with hash -1448617744, now seen corresponding path program 1 times [2023-11-19 07:46:03,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:46:03,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051681322] [2023-11-19 07:46:03,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:46:03,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:46:03,441 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:46:03,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1087206178] [2023-11-19 07:46:03,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:46:03,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:46:03,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b818246-d398-4f82-9faa-539be9b2dbf5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:46:03,443 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b818246-d398-4f82-9faa-539be9b2dbf5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:46:03,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b818246-d398-4f82-9faa-539be9b2dbf5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 07:46:03,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:46:03,830 INFO L262 TraceCheckSpWp]: Trace formula consists of 1233 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 07:46:03,842 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:46:04,590 INFO L134 CoverageAnalysis]: Checked inductivity of 13612 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13612 trivial. 0 not checked. [2023-11-19 07:46:04,590 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:46:04,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:46:04,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051681322] [2023-11-19 07:46:04,592 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:46:04,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087206178] [2023-11-19 07:46:04,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087206178] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:46:04,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:46:04,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:46:04,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739448465] [2023-11-19 07:46:04,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:46:04,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:46:04,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:46:04,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:46:04,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:46:04,597 INFO L87 Difference]: Start difference. First operand 721 states and 1221 transitions. Second operand has 3 states, 3 states have (on average 37.0) internal successors, (111), 2 states have internal predecessors, (111), 1 states have call successors, (83), 1 states have call predecessors, (83), 1 states have return successors, (83), 1 states have call predecessors, (83), 1 states have call successors, (83) [2023-11-19 07:46:04,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:46:04,683 INFO L93 Difference]: Finished difference Result 2149 states and 3641 transitions. [2023-11-19 07:46:04,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:46:04,683 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 2 states have internal predecessors, (111), 1 states have call successors, (83), 1 states have call predecessors, (83), 1 states have return successors, (83), 1 states have call predecessors, (83), 1 states have call successors, (83) Word has length 523 [2023-11-19 07:46:04,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:46:04,699 INFO L225 Difference]: With dead ends: 2149 [2023-11-19 07:46:04,699 INFO L226 Difference]: Without dead ends: 1431 [2023-11-19 07:46:04,702 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 522 GetRequests, 521 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 07:46:04,706 INFO L413 NwaCegarLoop]: 394 mSDtfsCounter, 142 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 782 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:46:04,709 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 782 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:46:04,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1431 states. [2023-11-19 07:46:04,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1431 to 1424. [2023-11-19 07:46:04,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1424 states, 975 states have (on average 1.5682051282051281) internal successors, (1529), 979 states have internal predecessors, (1529), 440 states have call successors, (440), 8 states have call predecessors, (440), 8 states have return successors, (440), 436 states have call predecessors, (440), 440 states have call successors, (440) [2023-11-19 07:46:04,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1424 states to 1424 states and 2409 transitions. [2023-11-19 07:46:04,966 INFO L78 Accepts]: Start accepts. Automaton has 1424 states and 2409 transitions. Word has length 523 [2023-11-19 07:46:04,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:46:04,968 INFO L495 AbstractCegarLoop]: Abstraction has 1424 states and 2409 transitions. [2023-11-19 07:46:04,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 2 states have internal predecessors, (111), 1 states have call successors, (83), 1 states have call predecessors, (83), 1 states have return successors, (83), 1 states have call predecessors, (83), 1 states have call successors, (83) [2023-11-19 07:46:04,969 INFO L276 IsEmpty]: Start isEmpty. Operand 1424 states and 2409 transitions. [2023-11-19 07:46:04,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 524 [2023-11-19 07:46:04,977 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:46:04,978 INFO L195 NwaCegarLoop]: trace histogram [83, 83, 83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:46:05,005 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b818246-d398-4f82-9faa-539be9b2dbf5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 07:46:05,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b818246-d398-4f82-9faa-539be9b2dbf5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:46:05,193 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:46:05,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:46:05,193 INFO L85 PathProgramCache]: Analyzing trace with hash 1574434608, now seen corresponding path program 1 times [2023-11-19 07:46:05,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:46:05,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046250380] [2023-11-19 07:46:05,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:46:05,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:46:05,309 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:46:05,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1611680030] [2023-11-19 07:46:05,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:46:05,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:46:05,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b818246-d398-4f82-9faa-539be9b2dbf5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:46:05,312 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b818246-d398-4f82-9faa-539be9b2dbf5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:46:05,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b818246-d398-4f82-9faa-539be9b2dbf5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 07:46:05,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:46:05,713 INFO L262 TraceCheckSpWp]: Trace formula consists of 1230 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 07:46:05,727 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:46:05,838 INFO L134 CoverageAnalysis]: Checked inductivity of 13612 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13612 trivial. 0 not checked. [2023-11-19 07:46:05,838 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:46:05,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:46:05,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046250380] [2023-11-19 07:46:05,839 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:46:05,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611680030] [2023-11-19 07:46:05,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611680030] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:46:05,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:46:05,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:46:05,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786273331] [2023-11-19 07:46:05,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:46:05,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:46:05,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:46:05,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:46:05,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:46:05,845 INFO L87 Difference]: Start difference. First operand 1424 states and 2409 transitions. Second operand has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 1 states have call successors, (83), 1 states have call predecessors, (83), 1 states have return successors, (83), 1 states have call predecessors, (83), 1 states have call successors, (83) [2023-11-19 07:46:06,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:46:06,082 INFO L93 Difference]: Finished difference Result 3958 states and 6713 transitions. [2023-11-19 07:46:06,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:46:06,085 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 1 states have call successors, (83), 1 states have call predecessors, (83), 1 states have return successors, (83), 1 states have call predecessors, (83), 1 states have call successors, (83) Word has length 523 [2023-11-19 07:46:06,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:46:06,107 INFO L225 Difference]: With dead ends: 3958 [2023-11-19 07:46:06,107 INFO L226 Difference]: Without dead ends: 2537 [2023-11-19 07:46:06,113 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 522 GetRequests, 521 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 07:46:06,115 INFO L413 NwaCegarLoop]: 495 mSDtfsCounter, 231 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 875 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:46:06,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [231 Valid, 875 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:46:06,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2537 states. [2023-11-19 07:46:06,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2537 to 2531. [2023-11-19 07:46:06,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2531 states, 1810 states have (on average 1.5878453038674034) internal successors, (2874), 1822 states have internal predecessors, (2874), 704 states have call successors, (704), 16 states have call predecessors, (704), 16 states have return successors, (704), 692 states have call predecessors, (704), 704 states have call successors, (704) [2023-11-19 07:46:06,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2531 states to 2531 states and 4282 transitions. [2023-11-19 07:46:06,509 INFO L78 Accepts]: Start accepts. Automaton has 2531 states and 4282 transitions. Word has length 523 [2023-11-19 07:46:06,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:46:06,511 INFO L495 AbstractCegarLoop]: Abstraction has 2531 states and 4282 transitions. [2023-11-19 07:46:06,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 1 states have call successors, (83), 1 states have call predecessors, (83), 1 states have return successors, (83), 1 states have call predecessors, (83), 1 states have call successors, (83) [2023-11-19 07:46:06,512 INFO L276 IsEmpty]: Start isEmpty. Operand 2531 states and 4282 transitions. [2023-11-19 07:46:06,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 524 [2023-11-19 07:46:06,519 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:46:06,520 INFO L195 NwaCegarLoop]: trace histogram [83, 83, 83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:46:06,550 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b818246-d398-4f82-9faa-539be9b2dbf5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 07:46:06,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b818246-d398-4f82-9faa-539be9b2dbf5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:46:06,740 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:46:06,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:46:06,741 INFO L85 PathProgramCache]: Analyzing trace with hash -1902884238, now seen corresponding path program 1 times [2023-11-19 07:46:06,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:46:06,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951356012] [2023-11-19 07:46:06,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:46:06,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:46:06,851 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:46:06,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1644626303] [2023-11-19 07:46:06,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:46:06,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:46:06,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b818246-d398-4f82-9faa-539be9b2dbf5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:46:06,857 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b818246-d398-4f82-9faa-539be9b2dbf5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:46:06,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b818246-d398-4f82-9faa-539be9b2dbf5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 07:46:07,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:46:07,291 INFO L262 TraceCheckSpWp]: Trace formula consists of 1231 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 07:46:07,302 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:46:07,456 INFO L134 CoverageAnalysis]: Checked inductivity of 13612 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13612 trivial. 0 not checked. [2023-11-19 07:46:07,456 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:46:07,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:46:07,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951356012] [2023-11-19 07:46:07,457 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:46:07,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644626303] [2023-11-19 07:46:07,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644626303] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:46:07,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:46:07,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 07:46:07,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645347148] [2023-11-19 07:46:07,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:46:07,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:46:07,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:46:07,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:46:07,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:46:07,464 INFO L87 Difference]: Start difference. First operand 2531 states and 4282 transitions. Second operand has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 1 states have call successors, (83), 1 states have call predecessors, (83), 1 states have return successors, (83), 1 states have call predecessors, (83), 1 states have call successors, (83) [2023-11-19 07:46:08,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:46:08,393 INFO L93 Difference]: Finished difference Result 6408 states and 10846 transitions. [2023-11-19 07:46:08,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:46:08,394 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 1 states have call successors, (83), 1 states have call predecessors, (83), 1 states have return successors, (83), 1 states have call predecessors, (83), 1 states have call successors, (83) Word has length 523 [2023-11-19 07:46:08,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:46:08,425 INFO L225 Difference]: With dead ends: 6408 [2023-11-19 07:46:08,425 INFO L226 Difference]: Without dead ends: 3880 [2023-11-19 07:46:08,435 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 522 GetRequests, 520 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:46:08,436 INFO L413 NwaCegarLoop]: 422 mSDtfsCounter, 468 mSDsluCounter, 666 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 468 SdHoareTripleChecker+Valid, 1088 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 07:46:08,436 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [468 Valid, 1088 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 07:46:08,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3880 states. [2023-11-19 07:46:08,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3880 to 1841. [2023-11-19 07:46:08,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1841 states, 1336 states have (on average 1.6047904191616766) internal successors, (2144), 1340 states have internal predecessors, (2144), 488 states have call successors, (488), 16 states have call predecessors, (488), 16 states have return successors, (488), 484 states have call predecessors, (488), 488 states have call successors, (488) [2023-11-19 07:46:08,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1841 states to 1841 states and 3120 transitions. [2023-11-19 07:46:08,865 INFO L78 Accepts]: Start accepts. Automaton has 1841 states and 3120 transitions. Word has length 523 [2023-11-19 07:46:08,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:46:08,867 INFO L495 AbstractCegarLoop]: Abstraction has 1841 states and 3120 transitions. [2023-11-19 07:46:08,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 1 states have call successors, (83), 1 states have call predecessors, (83), 1 states have return successors, (83), 1 states have call predecessors, (83), 1 states have call successors, (83) [2023-11-19 07:46:08,868 INFO L276 IsEmpty]: Start isEmpty. Operand 1841 states and 3120 transitions. [2023-11-19 07:46:08,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 524 [2023-11-19 07:46:08,878 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:46:08,878 INFO L195 NwaCegarLoop]: trace histogram [83, 83, 83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:46:08,909 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b818246-d398-4f82-9faa-539be9b2dbf5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 07:46:09,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b818246-d398-4f82-9faa-539be9b2dbf5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-19 07:46:09,093 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:46:09,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:46:09,094 INFO L85 PathProgramCache]: Analyzing trace with hash 1597097957, now seen corresponding path program 1 times [2023-11-19 07:46:09,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:46:09,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523719209] [2023-11-19 07:46:09,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:46:09,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:46:09,205 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:46:09,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [372451579] [2023-11-19 07:46:09,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:46:09,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:46:09,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b818246-d398-4f82-9faa-539be9b2dbf5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:46:09,208 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b818246-d398-4f82-9faa-539be9b2dbf5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:46:09,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b818246-d398-4f82-9faa-539be9b2dbf5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 07:46:09,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:46:09,683 INFO L262 TraceCheckSpWp]: Trace formula consists of 1228 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:46:09,695 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:46:09,796 INFO L134 CoverageAnalysis]: Checked inductivity of 13612 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13612 trivial. 0 not checked. [2023-11-19 07:46:09,797 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:46:09,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:46:09,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523719209] [2023-11-19 07:46:09,797 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:46:09,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372451579] [2023-11-19 07:46:09,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372451579] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:46:09,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:46:09,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 07:46:09,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516624477] [2023-11-19 07:46:09,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:46:09,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 07:46:09,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:46:09,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 07:46:09,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:46:09,802 INFO L87 Difference]: Start difference. First operand 1841 states and 3120 transitions. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 1 states have call successors, (83), 1 states have call predecessors, (83), 1 states have return successors, (83), 1 states have call predecessors, (83), 1 states have call successors, (83) [2023-11-19 07:46:11,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:46:11,672 INFO L93 Difference]: Finished difference Result 7433 states and 12625 transitions. [2023-11-19 07:46:11,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:46:11,673 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 1 states have call successors, (83), 1 states have call predecessors, (83), 1 states have return successors, (83), 1 states have call predecessors, (83), 1 states have call successors, (83) Word has length 523 [2023-11-19 07:46:11,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:46:11,710 INFO L225 Difference]: With dead ends: 7433 [2023-11-19 07:46:11,710 INFO L226 Difference]: Without dead ends: 5595 [2023-11-19 07:46:11,716 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 528 GetRequests, 521 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2023-11-19 07:46:11,717 INFO L413 NwaCegarLoop]: 466 mSDtfsCounter, 1119 mSDsluCounter, 1410 mSDsCounter, 0 mSdLazyCounter, 504 mSolverCounterSat, 383 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1119 SdHoareTripleChecker+Valid, 1876 SdHoareTripleChecker+Invalid, 887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 383 IncrementalHoareTripleChecker+Valid, 504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:46:11,718 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1119 Valid, 1876 Invalid, 887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [383 Valid, 504 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-19 07:46:11,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5595 states. [2023-11-19 07:46:12,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5595 to 2331. [2023-11-19 07:46:12,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2331 states, 1826 states have (on average 1.6746987951807228) internal successors, (3058), 1830 states have internal predecessors, (3058), 488 states have call successors, (488), 16 states have call predecessors, (488), 16 states have return successors, (488), 484 states have call predecessors, (488), 488 states have call successors, (488) [2023-11-19 07:46:12,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2331 states to 2331 states and 4034 transitions. [2023-11-19 07:46:12,227 INFO L78 Accepts]: Start accepts. Automaton has 2331 states and 4034 transitions. Word has length 523 [2023-11-19 07:46:12,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:46:12,228 INFO L495 AbstractCegarLoop]: Abstraction has 2331 states and 4034 transitions. [2023-11-19 07:46:12,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 1 states have call successors, (83), 1 states have call predecessors, (83), 1 states have return successors, (83), 1 states have call predecessors, (83), 1 states have call successors, (83) [2023-11-19 07:46:12,229 INFO L276 IsEmpty]: Start isEmpty. Operand 2331 states and 4034 transitions. [2023-11-19 07:46:12,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 524 [2023-11-19 07:46:12,236 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:46:12,236 INFO L195 NwaCegarLoop]: trace histogram [83, 83, 83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:46:12,259 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b818246-d398-4f82-9faa-539be9b2dbf5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-19 07:46:12,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b818246-d398-4f82-9faa-539be9b2dbf5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:46:12,450 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:46:12,450 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:46:12,450 INFO L85 PathProgramCache]: Analyzing trace with hash 225290659, now seen corresponding path program 1 times [2023-11-19 07:46:12,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:46:12,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621741671] [2023-11-19 07:46:12,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:46:12,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:46:12,529 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:46:12,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1152739322] [2023-11-19 07:46:12,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:46:12,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:46:12,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b818246-d398-4f82-9faa-539be9b2dbf5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:46:12,532 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b818246-d398-4f82-9faa-539be9b2dbf5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:46:12,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b818246-d398-4f82-9faa-539be9b2dbf5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 07:46:12,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:46:12,957 INFO L262 TraceCheckSpWp]: Trace formula consists of 1226 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:46:12,970 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:46:13,815 INFO L134 CoverageAnalysis]: Checked inductivity of 13612 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13612 trivial. 0 not checked. [2023-11-19 07:46:13,815 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:46:13,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:46:13,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621741671] [2023-11-19 07:46:13,816 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:46:13,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152739322] [2023-11-19 07:46:13,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152739322] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:46:13,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:46:13,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:46:13,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771224781] [2023-11-19 07:46:13,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:46:13,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 07:46:13,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:46:13,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 07:46:13,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:46:13,821 INFO L87 Difference]: Start difference. First operand 2331 states and 4034 transitions. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 5 states have internal predecessors, (111), 1 states have call successors, (83), 1 states have call predecessors, (83), 1 states have return successors, (83), 1 states have call predecessors, (83), 1 states have call successors, (83) [2023-11-19 07:46:15,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:46:15,862 INFO L93 Difference]: Finished difference Result 6075 states and 10433 transitions. [2023-11-19 07:46:15,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:46:15,863 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 5 states have internal predecessors, (111), 1 states have call successors, (83), 1 states have call predecessors, (83), 1 states have return successors, (83), 1 states have call predecessors, (83), 1 states have call successors, (83) Word has length 523 [2023-11-19 07:46:15,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:46:15,896 INFO L225 Difference]: With dead ends: 6075 [2023-11-19 07:46:15,897 INFO L226 Difference]: Without dead ends: 3747 [2023-11-19 07:46:15,905 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 524 GetRequests, 518 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:46:15,907 INFO L413 NwaCegarLoop]: 584 mSDtfsCounter, 974 mSDsluCounter, 1600 mSDsCounter, 0 mSdLazyCounter, 859 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 974 SdHoareTripleChecker+Valid, 2184 SdHoareTripleChecker+Invalid, 1078 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 859 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-19 07:46:15,907 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [974 Valid, 2184 Invalid, 1078 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 859 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-19 07:46:15,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3747 states. [2023-11-19 07:46:16,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3747 to 2331. [2023-11-19 07:46:16,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2331 states, 1826 states have (on average 1.6725082146768895) internal successors, (3054), 1830 states have internal predecessors, (3054), 488 states have call successors, (488), 16 states have call predecessors, (488), 16 states have return successors, (488), 484 states have call predecessors, (488), 488 states have call successors, (488) [2023-11-19 07:46:16,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2331 states to 2331 states and 4030 transitions. [2023-11-19 07:46:16,314 INFO L78 Accepts]: Start accepts. Automaton has 2331 states and 4030 transitions. Word has length 523 [2023-11-19 07:46:16,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:46:16,315 INFO L495 AbstractCegarLoop]: Abstraction has 2331 states and 4030 transitions. [2023-11-19 07:46:16,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 5 states have internal predecessors, (111), 1 states have call successors, (83), 1 states have call predecessors, (83), 1 states have return successors, (83), 1 states have call predecessors, (83), 1 states have call successors, (83) [2023-11-19 07:46:16,316 INFO L276 IsEmpty]: Start isEmpty. Operand 2331 states and 4030 transitions. [2023-11-19 07:46:16,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 524 [2023-11-19 07:46:16,323 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:46:16,323 INFO L195 NwaCegarLoop]: trace histogram [83, 83, 83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:46:16,347 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b818246-d398-4f82-9faa-539be9b2dbf5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-19 07:46:16,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b818246-d398-4f82-9faa-539be9b2dbf5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:46:16,545 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:46:16,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:46:16,545 INFO L85 PathProgramCache]: Analyzing trace with hash -1458983564, now seen corresponding path program 1 times [2023-11-19 07:46:16,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:46:16,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281823031] [2023-11-19 07:46:16,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:46:16,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:46:16,626 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:46:16,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [347325451] [2023-11-19 07:46:16,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:46:16,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:46:16,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b818246-d398-4f82-9faa-539be9b2dbf5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:46:16,628 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b818246-d398-4f82-9faa-539be9b2dbf5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:46:16,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b818246-d398-4f82-9faa-539be9b2dbf5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-19 07:46:17,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:46:17,079 INFO L262 TraceCheckSpWp]: Trace formula consists of 1229 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:46:17,090 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:46:18,843 INFO L134 CoverageAnalysis]: Checked inductivity of 13612 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13612 trivial. 0 not checked. [2023-11-19 07:46:18,843 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:46:18,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:46:18,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281823031] [2023-11-19 07:46:18,844 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:46:18,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347325451] [2023-11-19 07:46:18,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347325451] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:46:18,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:46:18,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:46:18,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382346495] [2023-11-19 07:46:18,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:46:18,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:46:18,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:46:18,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:46:18,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:46:18,853 INFO L87 Difference]: Start difference. First operand 2331 states and 4030 transitions. Second operand has 4 states, 4 states have (on average 27.75) internal successors, (111), 3 states have internal predecessors, (111), 1 states have call successors, (83), 1 states have call predecessors, (83), 1 states have return successors, (83), 1 states have call predecessors, (83), 1 states have call successors, (83) [2023-11-19 07:46:19,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:46:19,737 INFO L93 Difference]: Finished difference Result 8701 states and 14973 transitions. [2023-11-19 07:46:19,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:46:19,738 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 3 states have internal predecessors, (111), 1 states have call successors, (83), 1 states have call predecessors, (83), 1 states have return successors, (83), 1 states have call predecessors, (83), 1 states have call successors, (83) Word has length 523 [2023-11-19 07:46:19,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:46:19,787 INFO L225 Difference]: With dead ends: 8701 [2023-11-19 07:46:19,788 INFO L226 Difference]: Without dead ends: 6373 [2023-11-19 07:46:19,797 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 522 GetRequests, 520 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:46:19,797 INFO L413 NwaCegarLoop]: 423 mSDtfsCounter, 514 mSDsluCounter, 832 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 514 SdHoareTripleChecker+Valid, 1255 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 07:46:19,798 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [514 Valid, 1255 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 07:46:19,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6373 states. [2023-11-19 07:46:20,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6373 to 4649. [2023-11-19 07:46:20,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4649 states, 3640 states have (on average 1.6681318681318682) internal successors, (6072), 3648 states have internal predecessors, (6072), 976 states have call successors, (976), 32 states have call predecessors, (976), 32 states have return successors, (976), 968 states have call predecessors, (976), 976 states have call successors, (976) [2023-11-19 07:46:20,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4649 states to 4649 states and 8024 transitions. [2023-11-19 07:46:20,651 INFO L78 Accepts]: Start accepts. Automaton has 4649 states and 8024 transitions. Word has length 523 [2023-11-19 07:46:20,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:46:20,652 INFO L495 AbstractCegarLoop]: Abstraction has 4649 states and 8024 transitions. [2023-11-19 07:46:20,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 3 states have internal predecessors, (111), 1 states have call successors, (83), 1 states have call predecessors, (83), 1 states have return successors, (83), 1 states have call predecessors, (83), 1 states have call successors, (83) [2023-11-19 07:46:20,653 INFO L276 IsEmpty]: Start isEmpty. Operand 4649 states and 8024 transitions. [2023-11-19 07:46:20,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 525 [2023-11-19 07:46:20,660 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:46:20,661 INFO L195 NwaCegarLoop]: trace histogram [83, 83, 83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:46:20,686 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b818246-d398-4f82-9faa-539be9b2dbf5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-19 07:46:20,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b818246-d398-4f82-9faa-539be9b2dbf5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:46:20,877 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:46:20,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:46:20,877 INFO L85 PathProgramCache]: Analyzing trace with hash 1404360767, now seen corresponding path program 1 times [2023-11-19 07:46:20,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:46:20,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400099300] [2023-11-19 07:46:20,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:46:20,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:46:20,988 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:46:20,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1855493487] [2023-11-19 07:46:20,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:46:21,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:46:21,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b818246-d398-4f82-9faa-539be9b2dbf5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:46:21,007 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b818246-d398-4f82-9faa-539be9b2dbf5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:46:21,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b818246-d398-4f82-9faa-539be9b2dbf5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-19 07:46:21,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:46:21,486 INFO L262 TraceCheckSpWp]: Trace formula consists of 1228 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:46:21,497 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:46:22,430 INFO L134 CoverageAnalysis]: Checked inductivity of 13612 backedges. 1036 proven. 237 refuted. 0 times theorem prover too weak. 12339 trivial. 0 not checked. [2023-11-19 07:46:22,431 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:46:23,170 INFO L134 CoverageAnalysis]: Checked inductivity of 13612 backedges. 9 proven. 237 refuted. 0 times theorem prover too weak. 13366 trivial. 0 not checked. [2023-11-19 07:46:23,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:46:23,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400099300] [2023-11-19 07:46:23,171 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:46:23,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855493487] [2023-11-19 07:46:23,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855493487] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:46:23,171 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:46:23,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-19 07:46:23,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683541801] [2023-11-19 07:46:23,173 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:46:23,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 07:46:23,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:46:23,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 07:46:23,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:46:23,177 INFO L87 Difference]: Start difference. First operand 4649 states and 8024 transitions. Second operand has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 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 07:46:24,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:46:24,083 INFO L93 Difference]: Finished difference Result 9423 states and 16157 transitions. [2023-11-19 07:46:24,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 07:46:24,093 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 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 524 [2023-11-19 07:46:24,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:46:24,127 INFO L225 Difference]: With dead ends: 9423 [2023-11-19 07:46:24,128 INFO L226 Difference]: Without dead ends: 4777 [2023-11-19 07:46:24,141 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1050 GetRequests, 1040 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 07:46:24,142 INFO L413 NwaCegarLoop]: 307 mSDtfsCounter, 266 mSDsluCounter, 444 mSDsCounter, 0 mSdLazyCounter, 422 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 751 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 07:46:24,143 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [269 Valid, 751 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 422 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 07:46:24,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4777 states. [2023-11-19 07:46:24,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4777 to 4713. [2023-11-19 07:46:24,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4713 states, 3688 states have (on average 1.6550976138828633) internal successors, (6104), 3696 states have internal predecessors, (6104), 976 states have call successors, (976), 48 states have call predecessors, (976), 48 states have return successors, (976), 968 states have call predecessors, (976), 976 states have call successors, (976) [2023-11-19 07:46:24,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4713 states to 4713 states and 8056 transitions. [2023-11-19 07:46:24,813 INFO L78 Accepts]: Start accepts. Automaton has 4713 states and 8056 transitions. Word has length 524 [2023-11-19 07:46:24,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:46:24,814 INFO L495 AbstractCegarLoop]: Abstraction has 4713 states and 8056 transitions. [2023-11-19 07:46:24,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 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 07:46:24,815 INFO L276 IsEmpty]: Start isEmpty. Operand 4713 states and 8056 transitions. [2023-11-19 07:46:24,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 525 [2023-11-19 07:46:24,822 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:46:24,822 INFO L195 NwaCegarLoop]: trace histogram [83, 83, 83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:46:24,845 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b818246-d398-4f82-9faa-539be9b2dbf5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-19 07:46:25,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b818246-d398-4f82-9faa-539be9b2dbf5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-19 07:46:25,041 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:46:25,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:46:25,041 INFO L85 PathProgramCache]: Analyzing trace with hash -2081259903, now seen corresponding path program 1 times [2023-11-19 07:46:25,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:46:25,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949067783] [2023-11-19 07:46:25,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:46:25,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:46:25,113 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:46:25,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [620660101] [2023-11-19 07:46:25,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:46:25,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:46:25,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b818246-d398-4f82-9faa-539be9b2dbf5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:46:25,115 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b818246-d398-4f82-9faa-539be9b2dbf5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:46:25,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b818246-d398-4f82-9faa-539be9b2dbf5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-19 07:46:25,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:46:25,585 INFO L262 TraceCheckSpWp]: Trace formula consists of 1228 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:46:25,596 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:46:26,288 INFO L134 CoverageAnalysis]: Checked inductivity of 13612 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13612 trivial. 0 not checked. [2023-11-19 07:46:26,289 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:46:26,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:46:26,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949067783] [2023-11-19 07:46:26,289 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:46:26,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620660101] [2023-11-19 07:46:26,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620660101] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:46:26,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:46:26,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:46:26,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576522938] [2023-11-19 07:46:26,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:46:26,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:46:26,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:46:26,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:46:26,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:46:26,293 INFO L87 Difference]: Start difference. First operand 4713 states and 8056 transitions. Second operand has 4 states, 4 states have (on average 28.0) internal successors, (112), 3 states have internal predecessors, (112), 1 states have call successors, (83), 1 states have call predecessors, (83), 1 states have return successors, (83), 1 states have call predecessors, (83), 1 states have call successors, (83) [2023-11-19 07:46:27,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:46:27,422 INFO L93 Difference]: Finished difference Result 14247 states and 24307 transitions. [2023-11-19 07:46:27,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:46:27,424 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.0) internal successors, (112), 3 states have internal predecessors, (112), 1 states have call successors, (83), 1 states have call predecessors, (83), 1 states have return successors, (83), 1 states have call predecessors, (83), 1 states have call successors, (83) Word has length 524 [2023-11-19 07:46:27,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:46:27,466 INFO L225 Difference]: With dead ends: 14247 [2023-11-19 07:46:27,467 INFO L226 Difference]: Without dead ends: 9537 [2023-11-19 07:46:27,486 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 524 GetRequests, 521 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:46:27,487 INFO L413 NwaCegarLoop]: 394 mSDtfsCounter, 356 mSDsluCounter, 771 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 1165 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 07:46:27,487 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [356 Valid, 1165 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 07:46:27,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9537 states. [2023-11-19 07:46:28,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9537 to 9453. [2023-11-19 07:46:28,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9453 states, 7404 states have (on average 1.6482982171799028) internal successors, (12204), 7420 states have internal predecessors, (12204), 1952 states have call successors, (1952), 96 states have call predecessors, (1952), 96 states have return successors, (1952), 1936 states have call predecessors, (1952), 1952 states have call successors, (1952) [2023-11-19 07:46:28,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9453 states to 9453 states and 16108 transitions. [2023-11-19 07:46:28,785 INFO L78 Accepts]: Start accepts. Automaton has 9453 states and 16108 transitions. Word has length 524 [2023-11-19 07:46:28,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:46:28,786 INFO L495 AbstractCegarLoop]: Abstraction has 9453 states and 16108 transitions. [2023-11-19 07:46:28,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.0) internal successors, (112), 3 states have internal predecessors, (112), 1 states have call successors, (83), 1 states have call predecessors, (83), 1 states have return successors, (83), 1 states have call predecessors, (83), 1 states have call successors, (83) [2023-11-19 07:46:28,787 INFO L276 IsEmpty]: Start isEmpty. Operand 9453 states and 16108 transitions. [2023-11-19 07:46:28,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 525 [2023-11-19 07:46:28,794 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:46:28,795 INFO L195 NwaCegarLoop]: trace histogram [83, 83, 83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:46:28,824 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b818246-d398-4f82-9faa-539be9b2dbf5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-19 07:46:29,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b818246-d398-4f82-9faa-539be9b2dbf5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-19 07:46:29,009 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:46:29,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:46:29,009 INFO L85 PathProgramCache]: Analyzing trace with hash 1194486081, now seen corresponding path program 1 times [2023-11-19 07:46:29,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:46:29,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732873857] [2023-11-19 07:46:29,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:46:29,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:46:29,081 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:46:29,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1193061612] [2023-11-19 07:46:29,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:46:29,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:46:29,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b818246-d398-4f82-9faa-539be9b2dbf5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:46:29,083 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b818246-d398-4f82-9faa-539be9b2dbf5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:46:29,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b818246-d398-4f82-9faa-539be9b2dbf5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-19 07:46:29,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:46:29,652 INFO L262 TraceCheckSpWp]: Trace formula consists of 1224 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-19 07:46:29,668 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:46:32,303 INFO L134 CoverageAnalysis]: Checked inductivity of 13612 backedges. 8486 proven. 264 refuted. 0 times theorem prover too weak. 4862 trivial. 0 not checked. [2023-11-19 07:46:32,303 INFO L327 TraceCheckSpWp]: Computing backward predicates...