./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/fib_unsafe-6.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/pthread/fib_unsafe-6.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4c475d56613186560380fd7710c1a393bef46e366024d2f60e26aa83cc625627 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 04:23:57,279 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 04:23:57,281 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 04:23:57,312 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 04:23:57,313 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 04:23:57,314 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 04:23:57,316 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 04:23:57,319 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 04:23:57,321 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 04:23:57,322 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 04:23:57,323 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 04:23:57,324 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 04:23:57,325 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 04:23:57,326 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 04:23:57,328 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 04:23:57,329 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 04:23:57,330 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 04:23:57,331 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 04:23:57,333 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 04:23:57,336 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 04:23:57,338 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 04:23:57,339 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 04:23:57,340 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 04:23:57,341 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 04:23:57,345 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 04:23:57,345 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 04:23:57,346 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 04:23:57,347 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 04:23:57,347 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 04:23:57,348 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 04:23:57,349 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 04:23:57,350 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 04:23:57,351 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 04:23:57,352 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 04:23:57,353 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 04:23:57,353 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 04:23:57,354 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 04:23:57,354 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 04:23:57,355 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 04:23:57,356 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 04:23:57,357 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 04:23:57,358 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-03 04:23:57,383 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 04:23:57,387 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 04:23:57,389 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 04:23:57,390 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 04:23:57,391 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 04:23:57,391 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 04:23:57,391 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 04:23:57,391 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 04:23:57,392 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 04:23:57,392 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 04:23:57,393 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 04:23:57,393 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 04:23:57,393 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 04:23:57,394 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 04:23:57,394 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 04:23:57,395 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 04:23:57,395 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 04:23:57,395 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 04:23:57,395 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 04:23:57,396 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 04:23:57,396 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 04:23:57,396 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 04:23:57,396 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 04:23:57,396 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 04:23:57,397 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 04:23:57,397 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 04:23:57,397 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 04:23:57,397 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 04:23:57,398 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 04:23:57,399 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 04:23:57,400 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:23:57,400 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 04:23:57,400 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 04:23:57,401 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 04:23:57,401 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 04:23:57,401 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 04:23:57,401 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 04:23:57,402 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 04:23:57,402 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 04:23:57,402 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4c475d56613186560380fd7710c1a393bef46e366024d2f60e26aa83cc625627 [2021-11-03 04:23:57,718 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 04:23:57,739 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 04:23:57,741 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 04:23:57,742 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 04:23:57,743 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 04:23:57,744 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/pthread/fib_unsafe-6.i [2021-11-03 04:23:57,828 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/data/213929eba/9505a7e868574479aac47bf66c76c808/FLAGec07e02e7 [2021-11-03 04:23:58,366 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 04:23:58,366 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/sv-benchmarks/c/pthread/fib_unsafe-6.i [2021-11-03 04:23:58,392 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/data/213929eba/9505a7e868574479aac47bf66c76c808/FLAGec07e02e7 [2021-11-03 04:23:58,649 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/data/213929eba/9505a7e868574479aac47bf66c76c808 [2021-11-03 04:23:58,652 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 04:23:58,653 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 04:23:58,655 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 04:23:58,655 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 04:23:58,658 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 04:23:58,659 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:23:58" (1/1) ... [2021-11-03 04:23:58,660 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51c49231 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:23:58, skipping insertion in model container [2021-11-03 04:23:58,661 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:23:58" (1/1) ... [2021-11-03 04:23:58,668 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 04:23:58,702 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:23:59,059 WARN L228 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_6fe95dda-a9ea-4f68-b354-e181560dadc6/sv-benchmarks/c/pthread/fib_unsafe-6.i[30811,30824] [2021-11-03 04:23:59,062 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:23:59,070 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 04:23:59,108 WARN L228 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_6fe95dda-a9ea-4f68-b354-e181560dadc6/sv-benchmarks/c/pthread/fib_unsafe-6.i[30811,30824] [2021-11-03 04:23:59,110 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:23:59,149 INFO L208 MainTranslator]: Completed translation [2021-11-03 04:23:59,150 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:23:59 WrapperNode [2021-11-03 04:23:59,150 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 04:23:59,151 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 04:23:59,152 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 04:23:59,152 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 04:23:59,159 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:23:59" (1/1) ... [2021-11-03 04:23:59,173 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:23:59" (1/1) ... [2021-11-03 04:23:59,194 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 04:23:59,195 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 04:23:59,196 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 04:23:59,196 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 04:23:59,204 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:23:59" (1/1) ... [2021-11-03 04:23:59,204 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:23:59" (1/1) ... [2021-11-03 04:23:59,208 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:23:59" (1/1) ... [2021-11-03 04:23:59,208 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:23:59" (1/1) ... [2021-11-03 04:23:59,214 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:23:59" (1/1) ... [2021-11-03 04:23:59,219 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:23:59" (1/1) ... [2021-11-03 04:23:59,221 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:23:59" (1/1) ... [2021-11-03 04:23:59,224 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 04:23:59,225 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 04:23:59,225 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 04:23:59,225 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 04:23:59,226 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:23:59" (1/1) ... [2021-11-03 04:23:59,234 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:23:59,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:23:59,264 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 04:23:59,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 04:23:59,318 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2021-11-03 04:23:59,318 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2021-11-03 04:23:59,320 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2021-11-03 04:23:59,320 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2021-11-03 04:23:59,320 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-03 04:23:59,320 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-11-03 04:23:59,321 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 04:23:59,321 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-03 04:23:59,321 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-03 04:23:59,321 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-11-03 04:23:59,321 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 04:23:59,322 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 04:23:59,323 WARN L209 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-11-03 04:23:59,671 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 04:23:59,671 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2021-11-03 04:23:59,674 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:23:59 BoogieIcfgContainer [2021-11-03 04:23:59,674 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 04:23:59,676 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 04:23:59,676 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 04:23:59,680 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 04:23:59,680 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 04:23:58" (1/3) ... [2021-11-03 04:23:59,681 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3afbe247 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:23:59, skipping insertion in model container [2021-11-03 04:23:59,681 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:23:59" (2/3) ... [2021-11-03 04:23:59,681 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3afbe247 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:23:59, skipping insertion in model container [2021-11-03 04:23:59,681 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:23:59" (3/3) ... [2021-11-03 04:23:59,683 INFO L111 eAbstractionObserver]: Analyzing ICFG fib_unsafe-6.i [2021-11-03 04:23:59,688 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-11-03 04:23:59,689 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 04:23:59,689 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-03 04:23:59,689 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-11-03 04:23:59,717 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-03 04:23:59,718 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-03 04:23:59,718 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-03 04:23:59,718 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-03 04:23:59,718 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-03 04:23:59,719 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-03 04:23:59,719 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-03 04:23:59,719 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-03 04:23:59,720 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-03 04:23:59,720 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-03 04:23:59,720 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-03 04:23:59,720 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-03 04:23:59,721 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-03 04:23:59,721 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-03 04:23:59,721 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-03 04:23:59,722 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-03 04:23:59,722 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-03 04:23:59,722 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-03 04:23:59,723 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-03 04:23:59,723 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-03 04:23:59,723 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-03 04:23:59,723 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-03 04:23:59,724 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-03 04:23:59,724 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-03 04:23:59,724 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-03 04:23:59,724 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-03 04:23:59,725 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-03 04:23:59,725 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-03 04:23:59,725 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-03 04:23:59,726 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-03 04:23:59,726 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-03 04:23:59,726 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-03 04:23:59,726 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-03 04:23:59,727 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-03 04:23:59,727 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-03 04:23:59,727 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-03 04:23:59,731 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-03 04:23:59,731 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-03 04:23:59,731 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-03 04:23:59,732 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-03 04:23:59,732 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-03 04:23:59,737 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-03 04:23:59,737 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-03 04:23:59,737 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-03 04:23:59,737 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-03 04:23:59,738 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-03 04:23:59,740 INFO L148 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-11-03 04:23:59,785 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 04:23:59,792 INFO L339 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=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-03 04:23:59,793 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-11-03 04:23:59,808 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-11-03 04:23:59,821 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 90 places, 90 transitions, 190 flow [2021-11-03 04:23:59,825 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 90 places, 90 transitions, 190 flow [2021-11-03 04:23:59,827 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 90 places, 90 transitions, 190 flow [2021-11-03 04:23:59,879 INFO L129 PetriNetUnfolder]: 7/88 cut-off events. [2021-11-03 04:23:59,880 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-11-03 04:23:59,884 INFO L84 FinitePrefix]: Finished finitePrefix Result has 95 conditions, 88 events. 7/88 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 79 event pairs, 0 based on Foata normal form. 0/80 useless extension candidates. Maximal degree in co-relation 61. Up to 2 conditions per place. [2021-11-03 04:23:59,887 INFO L116 LiptonReduction]: Number of co-enabled transitions 1738 [2021-11-03 04:24:03,693 INFO L131 LiptonReduction]: Checked pairs total: 1312 [2021-11-03 04:24:03,693 INFO L133 LiptonReduction]: Total number of compositions: 83 [2021-11-03 04:24:03,713 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 16 transitions, 42 flow [2021-11-03 04:24:03,725 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 35 states, 34 states have (on average 2.7941176470588234) internal successors, (95), 34 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:24:03,727 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 34 states have (on average 2.7941176470588234) internal successors, (95), 34 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:24:03,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-03 04:24:03,732 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:24:03,733 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-03 04:24:03,734 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-03 04:24:03,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:24:03,739 INFO L85 PathProgramCache]: Analyzing trace with hash 1657331388, now seen corresponding path program 1 times [2021-11-03 04:24:03,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:24:03,750 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536691456] [2021-11-03 04:24:03,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:24:03,751 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:24:03,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:24:03,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:24:03,982 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:24:03,982 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536691456] [2021-11-03 04:24:03,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536691456] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:24:03,983 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:24:03,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-03 04:24:03,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911577416] [2021-11-03 04:24:03,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:24:03,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:24:04,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:24:04,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:24:04,007 INFO L87 Difference]: Start difference. First operand has 35 states, 34 states have (on average 2.7941176470588234) internal successors, (95), 34 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:24:04,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:24:04,042 INFO L93 Difference]: Finished difference Result 44 states and 122 transitions. [2021-11-03 04:24:04,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:24:04,045 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-03 04:24:04,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:24:04,069 INFO L225 Difference]: With dead ends: 44 [2021-11-03 04:24:04,069 INFO L226 Difference]: Without dead ends: 44 [2021-11-03 04:24:04,070 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:24:04,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-11-03 04:24:04,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-11-03 04:24:04,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 2.8372093023255816) internal successors, (122), 43 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:24:04,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 122 transitions. [2021-11-03 04:24:04,114 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 122 transitions. Word has length 6 [2021-11-03 04:24:04,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:24:04,116 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 122 transitions. [2021-11-03 04:24:04,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:24:04,117 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 122 transitions. [2021-11-03 04:24:04,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-03 04:24:04,119 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:24:04,119 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:24:04,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-03 04:24:04,119 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-03 04:24:04,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:24:04,121 INFO L85 PathProgramCache]: Analyzing trace with hash -162334149, now seen corresponding path program 1 times [2021-11-03 04:24:04,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:24:04,122 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485192396] [2021-11-03 04:24:04,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:24:04,122 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:24:04,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:24:04,224 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:24:04,224 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:24:04,225 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485192396] [2021-11-03 04:24:04,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485192396] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-03 04:24:04,227 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355628485] [2021-11-03 04:24:04,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:24:04,227 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:24:04,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:24:04,230 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:24:04,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-03 04:24:04,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:24:04,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:24:04,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:24:04,425 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:24:04,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:24:04,481 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:24:04,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355628485] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:24:04,481 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [575568501] [2021-11-03 04:24:04,488 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1603) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:609) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-03 04:24:04,490 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-03 04:24:04,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2021-11-03 04:24:04,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298731719] [2021-11-03 04:24:04,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 04:24:04,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:24:04,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 04:24:04,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-03 04:24:04,493 INFO L87 Difference]: Start difference. First operand 44 states and 122 transitions. Second operand has 7 states, 6 states have (on average 2.0) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:24:04,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:24:04,544 INFO L93 Difference]: Finished difference Result 71 states and 203 transitions. [2021-11-03 04:24:04,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 04:24:04,544 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-03 04:24:04,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:24:04,546 INFO L225 Difference]: With dead ends: 71 [2021-11-03 04:24:04,546 INFO L226 Difference]: Without dead ends: 71 [2021-11-03 04:24:04,547 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-03 04:24:04,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-11-03 04:24:04,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2021-11-03 04:24:04,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 2.9) internal successors, (203), 70 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:24:04,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 203 transitions. [2021-11-03 04:24:04,568 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 203 transitions. Word has length 7 [2021-11-03 04:24:04,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:24:04,569 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 203 transitions. [2021-11-03 04:24:04,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:24:04,571 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 203 transitions. [2021-11-03 04:24:04,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-03 04:24:04,572 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:24:04,573 INFO L513 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2021-11-03 04:24:04,615 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-03 04:24:04,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-11-03 04:24:04,803 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-03 04:24:04,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:24:04,804 INFO L85 PathProgramCache]: Analyzing trace with hash 36914812, now seen corresponding path program 2 times [2021-11-03 04:24:04,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:24:04,804 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819937849] [2021-11-03 04:24:04,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:24:04,805 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:24:04,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:24:04,949 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:24:04,949 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:24:04,950 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819937849] [2021-11-03 04:24:04,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819937849] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-03 04:24:04,950 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541984498] [2021-11-03 04:24:04,950 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-03 04:24:04,951 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:24:04,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:24:04,955 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:24:04,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-03 04:24:05,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-03 04:24:05,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:24:05,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-03 04:24:05,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:24:05,149 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:24:05,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:24:05,229 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:24:05,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541984498] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:24:05,232 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1492959340] [2021-11-03 04:24:05,232 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1603) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:609) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-03 04:24:05,234 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-03 04:24:05,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2021-11-03 04:24:05,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679494834] [2021-11-03 04:24:05,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-03 04:24:05,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:24:05,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-03 04:24:05,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-11-03 04:24:05,241 INFO L87 Difference]: Start difference. First operand 71 states and 203 transitions. Second operand has 13 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:24:05,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:24:05,304 INFO L93 Difference]: Finished difference Result 125 states and 365 transitions. [2021-11-03 04:24:05,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-03 04:24:05,306 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-03 04:24:05,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:24:05,315 INFO L225 Difference]: With dead ends: 125 [2021-11-03 04:24:05,316 INFO L226 Difference]: Without dead ends: 125 [2021-11-03 04:24:05,317 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-11-03 04:24:05,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-11-03 04:24:05,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2021-11-03 04:24:05,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 2.943548387096774) internal successors, (365), 124 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:24:05,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 365 transitions. [2021-11-03 04:24:05,348 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 365 transitions. Word has length 10 [2021-11-03 04:24:05,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:24:05,349 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 365 transitions. [2021-11-03 04:24:05,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:24:05,350 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 365 transitions. [2021-11-03 04:24:05,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-03 04:24:05,353 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:24:05,354 INFO L513 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2021-11-03 04:24:05,394 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-03 04:24:05,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:24:05,571 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-03 04:24:05,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:24:05,572 INFO L85 PathProgramCache]: Analyzing trace with hash 2028559900, now seen corresponding path program 3 times [2021-11-03 04:24:05,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:24:05,572 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184939334] [2021-11-03 04:24:05,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:24:05,573 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:24:05,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:24:05,768 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:24:05,768 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:24:05,769 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184939334] [2021-11-03 04:24:05,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184939334] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-03 04:24:05,769 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000601585] [2021-11-03 04:24:05,769 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-03 04:24:05,769 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:24:05,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:24:05,783 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:24:05,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-03 04:24:05,898 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-03 04:24:05,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:24:05,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-03 04:24:05,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:24:05,992 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:24:05,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:24:06,136 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:24:06,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000601585] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:24:06,138 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1072758704] [2021-11-03 04:24:06,138 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1603) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:609) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-03 04:24:06,140 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-03 04:24:06,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 16 [2021-11-03 04:24:06,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636146877] [2021-11-03 04:24:06,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-03 04:24:06,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:24:06,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-03 04:24:06,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-11-03 04:24:06,149 INFO L87 Difference]: Start difference. First operand 125 states and 365 transitions. Second operand has 17 states, 16 states have (on average 1.4375) internal successors, (23), 17 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:24:06,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:24:06,220 INFO L93 Difference]: Finished difference Result 161 states and 473 transitions. [2021-11-03 04:24:06,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-03 04:24:06,221 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.4375) internal successors, (23), 17 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-03 04:24:06,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:24:06,225 INFO L225 Difference]: With dead ends: 161 [2021-11-03 04:24:06,225 INFO L226 Difference]: Without dead ends: 161 [2021-11-03 04:24:06,226 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-11-03 04:24:06,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-11-03 04:24:06,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2021-11-03 04:24:06,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.95625) internal successors, (473), 160 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:24:06,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 473 transitions. [2021-11-03 04:24:06,262 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 473 transitions. Word has length 16 [2021-11-03 04:24:06,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:24:06,263 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 473 transitions. [2021-11-03 04:24:06,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.4375) internal successors, (23), 17 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:24:06,263 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 473 transitions. [2021-11-03 04:24:06,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-03 04:24:06,270 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:24:06,270 INFO L513 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1] [2021-11-03 04:24:06,305 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-03 04:24:06,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:24:06,496 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-03 04:24:06,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:24:06,496 INFO L85 PathProgramCache]: Analyzing trace with hash 189076956, now seen corresponding path program 4 times [2021-11-03 04:24:06,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:24:06,497 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188322453] [2021-11-03 04:24:06,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:24:06,497 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:24:06,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:24:06,958 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:24:06,959 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:24:06,959 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188322453] [2021-11-03 04:24:06,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188322453] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-03 04:24:06,959 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052370877] [2021-11-03 04:24:06,959 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-03 04:24:06,959 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:24:06,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:24:06,963 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:24:06,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-03 04:24:07,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:24:07,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-03 04:24:07,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:24:07,876 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 78 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:24:07,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:25:02,961 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:25:02,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052370877] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:25:02,962 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [871511265] [2021-11-03 04:25:02,962 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1603) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:609) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-03 04:25:02,962 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-03 04:25:02,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 45 [2021-11-03 04:25:02,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22477072] [2021-11-03 04:25:02,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-11-03 04:25:02,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:25:02,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-11-03 04:25:02,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=389, Invalid=1761, Unknown=12, NotChecked=0, Total=2162 [2021-11-03 04:25:02,966 INFO L87 Difference]: Start difference. First operand 161 states and 473 transitions. Second operand has 47 states, 46 states have (on average 1.3043478260869565) internal successors, (60), 46 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:26:23,171 WARN L228 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2021-11-03 04:26:23,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:26:23,179 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 101 [2021-11-03 04:26:23,203 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-11-03 04:26:23,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:26:23,372 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:241) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:260) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:155) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.Util.checkSat(Util.java:61) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA.getRedundancy(SimplifyDDA.java:621) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.simplify.SimplifyDDAWithTimeout.getRedundancy(SimplifyDDAWithTimeout.java:120) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA$Simplifier.walk(SimplifyDDA.java:371) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA.simplifyOnce(SimplifyDDA.java:650) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.simplify.SimplifyDDAWithTimeout.getSimplifiedTerm(SimplifyDDAWithTimeout.java:180) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:174) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:140) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:360) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:388) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:229) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.getOrConstructPredicate(DeterministicInterpolantAutomaton.java:282) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.constructSuccessorsAndTransitions(DeterministicInterpolantAutomaton.java:304) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:79) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:869) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:783) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:462) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:420) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1465) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:658) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:237) ... 56 more [2021-11-03 04:26:23,375 INFO L168 Benchmark]: Toolchain (without parser) took 144720.57 ms. Allocated memory was 148.9 MB in the beginning and 218.1 MB in the end (delta: 69.2 MB). Free memory was 114.2 MB in the beginning and 177.0 MB in the end (delta: -62.8 MB). Peak memory consumption was 122.7 MB. Max. memory is 16.1 GB. [2021-11-03 04:26:23,375 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 88.1 MB. Free memory is still 44.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-03 04:26:23,376 INFO L168 Benchmark]: CACSL2BoogieTranslator took 495.55 ms. Allocated memory is still 148.9 MB. Free memory was 113.9 MB in the beginning and 114.2 MB in the end (delta: -393.9 kB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-11-03 04:26:23,376 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.36 ms. Allocated memory is still 148.9 MB. Free memory was 114.2 MB in the beginning and 112.5 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-03 04:26:23,377 INFO L168 Benchmark]: Boogie Preprocessor took 28.95 ms. Allocated memory is still 148.9 MB. Free memory was 112.5 MB in the beginning and 111.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-03 04:26:23,377 INFO L168 Benchmark]: RCFGBuilder took 449.38 ms. Allocated memory is still 148.9 MB. Free memory was 111.0 MB in the beginning and 98.3 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-11-03 04:26:23,378 INFO L168 Benchmark]: TraceAbstraction took 143697.41 ms. Allocated memory was 148.9 MB in the beginning and 218.1 MB in the end (delta: 69.2 MB). Free memory was 97.9 MB in the beginning and 177.0 MB in the end (delta: -79.1 MB). Peak memory consumption was 108.7 MB. Max. memory is 16.1 GB. [2021-11-03 04:26:23,380 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 88.1 MB. Free memory is still 44.7 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 495.55 ms. Allocated memory is still 148.9 MB. Free memory was 113.9 MB in the beginning and 114.2 MB in the end (delta: -393.9 kB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 43.36 ms. Allocated memory is still 148.9 MB. Free memory was 114.2 MB in the beginning and 112.5 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 28.95 ms. Allocated memory is still 148.9 MB. Free memory was 112.5 MB in the beginning and 111.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 449.38 ms. Allocated memory is still 148.9 MB. Free memory was 111.0 MB in the beginning and 98.3 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 143697.41 ms. Allocated memory was 148.9 MB in the beginning and 218.1 MB in the end (delta: 69.2 MB). Free memory was 97.9 MB in the beginning and 177.0 MB in the end (delta: -79.1 MB). Peak memory consumption was 108.7 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.8s, 90 PlacesBefore, 20 PlacesAfterwards, 90 TransitionsBefore, 16 TransitionsAfterwards, 1738 CoEnabledTransitionPairs, 6 FixpointIterations, 27 TrivialSequentialCompositions, 45 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 7 ConcurrentYvCompositions, 4 ChoiceCompositions, 83 TotalNumberOfCompositions, 1312 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1171, positive: 1163, positive conditional: 0, positive unconditional: 1163, negative: 8, negative conditional: 0, negative unconditional: 8, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 1022, positive: 1015, positive conditional: 0, positive unconditional: 1015, negative: 7, negative conditional: 0, negative unconditional: 7, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 1022, positive: 1015, positive conditional: 0, positive unconditional: 1015, negative: 7, negative conditional: 0, negative unconditional: 7, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 7, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 7, negative conditional: 0, negative unconditional: 7, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 22, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 22, negative conditional: 0, negative unconditional: 22, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 1171, positive: 148, positive conditional: 0, positive unconditional: 148, negative: 1, negative conditional: 0, negative unconditional: 1, unknown: 1022, unknown conditional: 0, unknown unconditional: 1022] , Statistics on independence cache: Total cache size (in pairs): 3, Positive cache size: 3, Positive conditional cache size: 0, Positive unconditional cache size: 3, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - ExceptionOrErrorResult: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:241) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/pthread/fib_unsafe-6.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4c475d56613186560380fd7710c1a393bef46e366024d2f60e26aa83cc625627 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 04:26:25,585 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 04:26:25,588 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 04:26:25,640 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 04:26:25,641 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 04:26:25,645 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 04:26:25,647 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 04:26:25,652 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 04:26:25,655 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 04:26:25,663 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 04:26:25,664 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 04:26:25,666 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 04:26:25,667 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 04:26:25,669 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 04:26:25,671 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 04:26:25,675 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 04:26:25,677 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 04:26:25,678 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 04:26:25,681 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 04:26:25,683 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 04:26:25,685 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 04:26:25,686 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 04:26:25,688 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 04:26:25,688 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 04:26:25,692 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 04:26:25,692 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 04:26:25,693 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 04:26:25,693 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 04:26:25,694 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 04:26:25,695 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 04:26:25,695 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 04:26:25,696 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 04:26:25,697 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 04:26:25,698 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 04:26:25,709 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 04:26:25,715 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 04:26:25,715 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 04:26:25,716 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 04:26:25,716 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 04:26:25,717 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 04:26:25,717 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 04:26:25,722 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-03 04:26:25,762 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 04:26:25,762 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 04:26:25,764 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 04:26:25,764 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 04:26:25,764 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 04:26:25,764 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 04:26:25,765 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 04:26:25,765 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 04:26:25,765 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 04:26:25,767 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 04:26:25,768 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 04:26:25,768 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 04:26:25,768 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 04:26:25,768 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 04:26:25,769 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 04:26:25,769 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 04:26:25,769 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 04:26:25,769 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-03 04:26:25,769 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-03 04:26:25,769 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 04:26:25,770 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 04:26:25,770 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 04:26:25,770 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 04:26:25,770 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 04:26:25,770 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-03 04:26:25,771 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 04:26:25,771 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:26:25,771 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 04:26:25,771 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 04:26:25,771 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 04:26:25,772 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-03 04:26:25,772 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-03 04:26:25,772 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 04:26:25,772 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 04:26:25,773 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 04:26:25,773 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4c475d56613186560380fd7710c1a393bef46e366024d2f60e26aa83cc625627 [2021-11-03 04:26:26,206 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 04:26:26,237 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 04:26:26,242 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 04:26:26,244 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 04:26:26,244 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 04:26:26,246 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/pthread/fib_unsafe-6.i [2021-11-03 04:26:26,313 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/data/983e1a009/92d7f60a54b74e239394dcd9aaf7b7d9/FLAG7eb9fd16f [2021-11-03 04:26:26,861 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 04:26:26,862 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/sv-benchmarks/c/pthread/fib_unsafe-6.i [2021-11-03 04:26:26,896 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/data/983e1a009/92d7f60a54b74e239394dcd9aaf7b7d9/FLAG7eb9fd16f [2021-11-03 04:26:27,152 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/data/983e1a009/92d7f60a54b74e239394dcd9aaf7b7d9 [2021-11-03 04:26:27,156 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 04:26:27,160 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 04:26:27,170 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 04:26:27,170 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 04:26:27,175 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 04:26:27,176 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:26:27" (1/1) ... [2021-11-03 04:26:27,177 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a9cf017 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:26:27, skipping insertion in model container [2021-11-03 04:26:27,180 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:26:27" (1/1) ... [2021-11-03 04:26:27,190 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 04:26:27,259 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:26:27,680 WARN L228 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_6fe95dda-a9ea-4f68-b354-e181560dadc6/sv-benchmarks/c/pthread/fib_unsafe-6.i[30811,30824] [2021-11-03 04:26:27,683 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:26:27,695 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 04:26:27,734 WARN L228 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_6fe95dda-a9ea-4f68-b354-e181560dadc6/sv-benchmarks/c/pthread/fib_unsafe-6.i[30811,30824] [2021-11-03 04:26:27,735 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:26:27,775 INFO L208 MainTranslator]: Completed translation [2021-11-03 04:26:27,775 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:26:27 WrapperNode [2021-11-03 04:26:27,775 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 04:26:27,777 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 04:26:27,777 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 04:26:27,777 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 04:26:27,784 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:26:27" (1/1) ... [2021-11-03 04:26:27,802 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:26:27" (1/1) ... [2021-11-03 04:26:27,835 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 04:26:27,836 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 04:26:27,836 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 04:26:27,836 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 04:26:27,845 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:26:27" (1/1) ... [2021-11-03 04:26:27,846 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:26:27" (1/1) ... [2021-11-03 04:26:27,862 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:26:27" (1/1) ... [2021-11-03 04:26:27,863 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:26:27" (1/1) ... [2021-11-03 04:26:27,872 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:26:27" (1/1) ... [2021-11-03 04:26:27,886 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:26:27" (1/1) ... [2021-11-03 04:26:27,897 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:26:27" (1/1) ... [2021-11-03 04:26:27,901 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 04:26:27,902 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 04:26:27,902 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 04:26:27,903 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 04:26:27,904 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:26:27" (1/1) ... [2021-11-03 04:26:27,919 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:26:27,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:26:27,947 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 04:26:27,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 04:26:28,006 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2021-11-03 04:26:28,007 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2021-11-03 04:26:28,007 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2021-11-03 04:26:28,007 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2021-11-03 04:26:28,008 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-11-03 04:26:28,008 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 04:26:28,008 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-03 04:26:28,008 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-03 04:26:28,009 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-03 04:26:28,009 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-11-03 04:26:28,009 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 04:26:28,009 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 04:26:28,011 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-11-03 04:26:28,541 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 04:26:28,541 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2021-11-03 04:26:28,544 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:26:28 BoogieIcfgContainer [2021-11-03 04:26:28,544 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 04:26:28,546 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 04:26:28,546 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 04:26:28,551 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 04:26:28,552 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 04:26:27" (1/3) ... [2021-11-03 04:26:28,553 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ed16d34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:26:28, skipping insertion in model container [2021-11-03 04:26:28,553 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:26:27" (2/3) ... [2021-11-03 04:26:28,554 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ed16d34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:26:28, skipping insertion in model container [2021-11-03 04:26:28,554 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:26:28" (3/3) ... [2021-11-03 04:26:28,564 INFO L111 eAbstractionObserver]: Analyzing ICFG fib_unsafe-6.i [2021-11-03 04:26:28,571 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-11-03 04:26:28,571 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 04:26:28,572 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-03 04:26:28,572 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-11-03 04:26:28,623 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-03 04:26:28,623 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-03 04:26:28,624 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-03 04:26:28,624 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-03 04:26:28,624 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-03 04:26:28,624 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-03 04:26:28,624 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-03 04:26:28,624 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-03 04:26:28,625 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-03 04:26:28,625 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-03 04:26:28,625 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-03 04:26:28,626 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-03 04:26:28,626 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-03 04:26:28,626 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-03 04:26:28,626 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-03 04:26:28,627 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-03 04:26:28,627 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-03 04:26:28,627 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-03 04:26:28,627 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-03 04:26:28,628 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-03 04:26:28,628 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-03 04:26:28,628 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-03 04:26:28,628 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-03 04:26:28,628 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-03 04:26:28,629 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-03 04:26:28,629 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-03 04:26:28,629 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-03 04:26:28,629 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-03 04:26:28,630 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-03 04:26:28,630 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-03 04:26:28,630 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-03 04:26:28,630 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-03 04:26:28,630 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-03 04:26:28,631 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-03 04:26:28,631 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-03 04:26:28,631 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-03 04:26:28,634 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-03 04:26:28,635 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-03 04:26:28,635 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-03 04:26:28,635 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-03 04:26:28,635 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-03 04:26:28,641 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-03 04:26:28,642 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-03 04:26:28,642 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-03 04:26:28,642 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-03 04:26:28,642 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-03 04:26:28,645 INFO L148 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-11-03 04:26:28,694 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 04:26:28,701 INFO L339 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=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-03 04:26:28,701 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-11-03 04:26:28,718 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-11-03 04:26:28,731 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 90 places, 90 transitions, 190 flow [2021-11-03 04:26:28,734 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 90 places, 90 transitions, 190 flow [2021-11-03 04:26:28,736 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 90 places, 90 transitions, 190 flow [2021-11-03 04:26:28,785 INFO L129 PetriNetUnfolder]: 7/88 cut-off events. [2021-11-03 04:26:28,786 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-11-03 04:26:28,791 INFO L84 FinitePrefix]: Finished finitePrefix Result has 95 conditions, 88 events. 7/88 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 83 event pairs, 0 based on Foata normal form. 0/80 useless extension candidates. Maximal degree in co-relation 60. Up to 2 conditions per place. [2021-11-03 04:26:28,795 INFO L116 LiptonReduction]: Number of co-enabled transitions 1694 [2021-11-03 04:26:36,788 INFO L131 LiptonReduction]: Checked pairs total: 1373 [2021-11-03 04:26:36,789 INFO L133 LiptonReduction]: Total number of compositions: 86 [2021-11-03 04:26:36,798 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 16 transitions, 42 flow [2021-11-03 04:26:36,810 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 35 states, 34 states have (on average 2.7941176470588234) internal successors, (95), 34 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:26:36,813 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 34 states have (on average 2.7941176470588234) internal successors, (95), 34 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:26:36,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-03 04:26:36,819 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:26:36,820 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-03 04:26:36,820 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-03 04:26:36,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:26:36,827 INFO L85 PathProgramCache]: Analyzing trace with hash 1714679147, now seen corresponding path program 1 times [2021-11-03 04:26:36,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:26:36,840 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2003670670] [2021-11-03 04:26:36,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:26:36,842 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:26:36,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:26:36,844 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:26:36,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-03 04:26:36,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:26:36,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 04:26:36,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:26:37,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:26:37,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:26:37,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:26:37,118 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:26:37,118 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2003670670] [2021-11-03 04:26:37,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2003670670] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:26:37,119 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:26:37,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-03 04:26:37,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93128763] [2021-11-03 04:26:37,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:26:37,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:26:37,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:26:37,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:26:37,165 INFO L87 Difference]: Start difference. First operand has 35 states, 34 states have (on average 2.7941176470588234) internal successors, (95), 34 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:26:37,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:26:37,242 INFO L93 Difference]: Finished difference Result 53 states and 149 transitions. [2021-11-03 04:26:37,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:26:37,244 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-03 04:26:37,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:26:37,265 INFO L225 Difference]: With dead ends: 53 [2021-11-03 04:26:37,266 INFO L226 Difference]: Without dead ends: 53 [2021-11-03 04:26:37,267 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:26:37,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-11-03 04:26:37,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-11-03 04:26:37,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 2.8653846153846154) internal successors, (149), 52 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:26:37,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 149 transitions. [2021-11-03 04:26:37,325 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 149 transitions. Word has length 6 [2021-11-03 04:26:37,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:26:37,326 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 149 transitions. [2021-11-03 04:26:37,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:26:37,326 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 149 transitions. [2021-11-03 04:26:37,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-03 04:26:37,329 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:26:37,329 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2021-11-03 04:26:37,348 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-03 04:26:37,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:26:37,546 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-03 04:26:37,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:26:37,547 INFO L85 PathProgramCache]: Analyzing trace with hash -1460759765, now seen corresponding path program 1 times [2021-11-03 04:26:37,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:26:37,549 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1921608995] [2021-11-03 04:26:37,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:26:37,550 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:26:37,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:26:37,557 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:26:37,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-03 04:26:37,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:26:37,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:26:37,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:26:37,699 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:26:37,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:26:37,792 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:26:37,792 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:26:37,793 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1921608995] [2021-11-03 04:26:37,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1921608995] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:26:37,793 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1263099582] [2021-11-03 04:26:37,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:26:37,794 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:26:37,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:26:37,827 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:26:37,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2021-11-03 04:26:38,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:26:38,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:26:38,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:26:38,070 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:26:38,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:26:38,103 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:26:38,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1263099582] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:26:38,104 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851859468] [2021-11-03 04:26:38,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:26:38,105 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:26:38,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:26:38,107 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:26:38,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-03 04:26:38,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:26:38,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:26:38,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:26:38,268 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:26:38,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:26:38,321 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:26:38,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851859468] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:26:38,321 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 04:26:38,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 7 [2021-11-03 04:26:38,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948972411] [2021-11-03 04:26:38,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 04:26:38,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:26:38,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 04:26:38,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:26:38,326 INFO L87 Difference]: Start difference. First operand 53 states and 149 transitions. Second operand has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:26:38,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:26:38,467 INFO L93 Difference]: Finished difference Result 89 states and 257 transitions. [2021-11-03 04:26:38,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-03 04:26:38,468 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-03 04:26:38,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:26:38,471 INFO L225 Difference]: With dead ends: 89 [2021-11-03 04:26:38,472 INFO L226 Difference]: Without dead ends: 89 [2021-11-03 04:26:38,473 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-11-03 04:26:38,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-11-03 04:26:38,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2021-11-03 04:26:38,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 2.9204545454545454) internal successors, (257), 88 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:26:38,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 257 transitions. [2021-11-03 04:26:38,489 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 257 transitions. Word has length 8 [2021-11-03 04:26:38,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:26:38,490 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 257 transitions. [2021-11-03 04:26:38,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:26:38,490 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 257 transitions. [2021-11-03 04:26:38,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-03 04:26:38,492 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:26:38,492 INFO L513 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1] [2021-11-03 04:26:38,502 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (4)] Forceful destruction successful, exit code 0 [2021-11-03 04:26:38,703 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-03 04:26:38,918 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-03 04:26:39,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:26:39,096 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-03 04:26:39,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:26:39,097 INFO L85 PathProgramCache]: Analyzing trace with hash -1660383573, now seen corresponding path program 2 times [2021-11-03 04:26:39,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:26:39,098 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [597473976] [2021-11-03 04:26:39,098 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 04:26:39,098 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:26:39,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:26:39,099 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:26:39,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-03 04:26:39,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 04:26:39,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:26:39,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-03 04:26:39,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:26:39,376 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:26:39,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:26:39,646 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:26:39,646 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:26:39,647 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [597473976] [2021-11-03 04:26:39,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [597473976] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:26:39,647 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [74368734] [2021-11-03 04:26:39,647 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 04:26:39,648 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:26:39,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:26:39,651 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:26:39,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-11-03 04:26:39,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 04:26:39,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:26:39,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-03 04:26:39,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:26:39,968 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:26:39,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:26:40,031 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:26:40,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [74368734] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:26:40,032 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34668704] [2021-11-03 04:26:40,032 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 04:26:40,032 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:26:40,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:26:40,033 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:26:40,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-03 04:26:40,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 04:26:40,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:26:40,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-03 04:26:40,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:26:40,237 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:26:40,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:26:40,298 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:26:40,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34668704] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:26:40,299 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 04:26:40,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 15 [2021-11-03 04:26:40,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553409679] [2021-11-03 04:26:40,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-03 04:26:40,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:26:40,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-03 04:26:40,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-11-03 04:26:40,302 INFO L87 Difference]: Start difference. First operand 89 states and 257 transitions. Second operand has 16 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 16 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:26:40,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:26:40,810 INFO L93 Difference]: Finished difference Result 161 states and 473 transitions. [2021-11-03 04:26:40,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-03 04:26:40,811 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 16 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-03 04:26:40,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:26:40,813 INFO L225 Difference]: With dead ends: 161 [2021-11-03 04:26:40,813 INFO L226 Difference]: Without dead ends: 161 [2021-11-03 04:26:40,814 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=174, Invalid=288, Unknown=0, NotChecked=0, Total=462 [2021-11-03 04:26:40,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-11-03 04:26:40,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2021-11-03 04:26:40,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.95625) internal successors, (473), 160 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:26:40,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 473 transitions. [2021-11-03 04:26:40,832 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 473 transitions. Word has length 12 [2021-11-03 04:26:40,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:26:40,832 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 473 transitions. [2021-11-03 04:26:40,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 16 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:26:40,834 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 473 transitions. [2021-11-03 04:26:40,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-03 04:26:40,837 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:26:40,837 INFO L513 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1] [2021-11-03 04:26:40,875 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-03 04:26:41,052 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2021-11-03 04:26:41,260 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-11-03 04:26:41,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:26:41,452 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-03 04:26:41,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:26:41,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1159772757, now seen corresponding path program 3 times [2021-11-03 04:26:41,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:26:41,453 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1845018836] [2021-11-03 04:26:41,453 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-03 04:26:41,453 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:26:41,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:26:41,455 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:26:41,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-03 04:26:41,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-03 04:26:41,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:26:41,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-03 04:26:41,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:26:42,495 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:26:42,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:26:45,724 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:26:45,725 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:26:45,725 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1845018836] [2021-11-03 04:26:45,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1845018836] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:26:45,725 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [379815237] [2021-11-03 04:26:45,726 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-03 04:26:45,726 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:26:45,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:26:45,735 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:26:45,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-03 04:26:46,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-03 04:26:46,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:26:46,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-03 04:26:46,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:26:46,733 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:26:46,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:26:47,109 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:26:47,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [379815237] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:26:47,109 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990583022] [2021-11-03 04:26:47,109 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-03 04:26:47,110 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:26:47,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:26:47,115 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:26:47,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-03 04:26:47,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-03 04:26:47,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:26:47,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-03 04:26:47,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:26:47,906 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:26:47,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:26:48,313 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:26:48,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990583022] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:26:48,313 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 04:26:48,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15, 15, 15, 15] total 30 [2021-11-03 04:26:48,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626192939] [2021-11-03 04:26:48,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-03 04:26:48,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:26:48,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-03 04:26:48,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=740, Unknown=0, NotChecked=0, Total=992 [2021-11-03 04:26:48,316 INFO L87 Difference]: Start difference. First operand 161 states and 473 transitions. Second operand has 32 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 31 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:27:23,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:27:23,751 INFO L93 Difference]: Finished difference Result 1295 states and 3867 transitions. [2021-11-03 04:27:23,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-11-03 04:27:23,757 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 31 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-03 04:27:23,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:27:23,770 INFO L225 Difference]: With dead ends: 1295 [2021-11-03 04:27:23,770 INFO L226 Difference]: Without dead ends: 1295 [2021-11-03 04:27:23,772 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 69 SyntacticMatches, 15 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 775 ImplicationChecksByTransitivity, 32.5s TimeCoverageRelationStatistics Valid=1044, Invalid=2378, Unknown=0, NotChecked=0, Total=3422 [2021-11-03 04:27:23,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1295 states. [2021-11-03 04:27:23,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1295 to 1167. [2021-11-03 04:27:23,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1167 states, 1166 states have (on average 3.1998284734133793) internal successors, (3731), 1166 states have internal predecessors, (3731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:27:23,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1167 states to 1167 states and 3731 transitions. [2021-11-03 04:27:23,841 INFO L78 Accepts]: Start accepts. Automaton has 1167 states and 3731 transitions. Word has length 20 [2021-11-03 04:27:23,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:27:23,841 INFO L470 AbstractCegarLoop]: Abstraction has 1167 states and 3731 transitions. [2021-11-03 04:27:23,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 31 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:27:23,842 INFO L276 IsEmpty]: Start isEmpty. Operand 1167 states and 3731 transitions. [2021-11-03 04:27:23,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-03 04:27:23,850 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:27:23,850 INFO L513 BasicCegarLoop]: trace histogram [14, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:27:23,867 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-03 04:27:24,070 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-11-03 04:27:24,306 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-03 04:27:24,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:27:24,464 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-03 04:27:24,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:27:24,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1713710973, now seen corresponding path program 1 times [2021-11-03 04:27:24,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:27:24,465 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1318420791] [2021-11-03 04:27:24,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:27:24,465 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:27:24,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:27:24,468 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:27:24,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-03 04:27:24,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:27:24,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-03 04:27:24,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:27:25,735 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:27:25,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:27:30,699 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:27:30,699 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:27:30,699 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1318420791] [2021-11-03 04:27:30,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1318420791] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:27:30,700 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [43855478] [2021-11-03 04:27:30,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:27:30,701 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:27:30,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:27:30,706 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:27:30,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-03 04:27:31,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:27:31,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-03 04:27:31,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:27:31,647 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:27:31,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:27:32,148 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:27:32,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [43855478] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:27:32,149 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721894249] [2021-11-03 04:27:32,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:27:32,149 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:27:32,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:27:32,152 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:27:32,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-03 04:27:32,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:27:32,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-03 04:27:32,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:27:33,007 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:27:33,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:27:33,508 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:27:33,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721894249] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:27:33,508 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 04:27:33,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17, 17, 17, 17] total 34 [2021-11-03 04:27:33,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207914205] [2021-11-03 04:27:33,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-03 04:27:33,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:27:33,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-03 04:27:33,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=956, Unknown=0, NotChecked=0, Total=1260 [2021-11-03 04:27:33,512 INFO L87 Difference]: Start difference. First operand 1167 states and 3731 transitions. Second operand has 36 states, 35 states have (on average 1.3142857142857143) internal successors, (46), 35 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:28:26,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:28:26,388 INFO L93 Difference]: Finished difference Result 3045 states and 9309 transitions. [2021-11-03 04:28:26,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-11-03 04:28:26,395 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 1.3142857142857143) internal successors, (46), 35 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-11-03 04:28:26,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:28:26,426 INFO L225 Difference]: With dead ends: 3045 [2021-11-03 04:28:26,426 INFO L226 Difference]: Without dead ends: 3045 [2021-11-03 04:28:26,428 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 83 SyntacticMatches, 15 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1031 ImplicationChecksByTransitivity, 50.6s TimeCoverageRelationStatistics Valid=1268, Invalid=3424, Unknown=0, NotChecked=0, Total=4692 [2021-11-03 04:28:26,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3045 states. [2021-11-03 04:28:26,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3045 to 2042. [2021-11-03 04:28:26,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2042 states, 2041 states have (on average 3.1940225379715828) internal successors, (6519), 2041 states have internal predecessors, (6519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:28:26,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2042 states to 2042 states and 6519 transitions. [2021-11-03 04:28:26,533 INFO L78 Accepts]: Start accepts. Automaton has 2042 states and 6519 transitions. Word has length 23 [2021-11-03 04:28:26,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:28:26,534 INFO L470 AbstractCegarLoop]: Abstraction has 2042 states and 6519 transitions. [2021-11-03 04:28:26,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 1.3142857142857143) internal successors, (46), 35 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:28:26,534 INFO L276 IsEmpty]: Start isEmpty. Operand 2042 states and 6519 transitions. [2021-11-03 04:28:26,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-03 04:28:26,541 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:28:26,541 INFO L513 BasicCegarLoop]: trace histogram [14, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:28:26,584 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-03 04:28:26,778 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-03 04:28:26,969 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (13)] Ended with exit code 0 [2021-11-03 04:28:27,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt [2021-11-03 04:28:27,167 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-03 04:28:27,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:28:27,168 INFO L85 PathProgramCache]: Analyzing trace with hash 2084685453, now seen corresponding path program 2 times [2021-11-03 04:28:27,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:28:27,169 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1949194226] [2021-11-03 04:28:27,169 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 04:28:27,169 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:28:27,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:28:27,170 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:28:27,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-03 04:28:27,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 04:28:27,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:28:27,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-03 04:28:27,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:28:28,502 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:28:28,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:28:33,556 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:28:33,556 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:28:33,556 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1949194226] [2021-11-03 04:28:33,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1949194226] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:28:33,556 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [955929399] [2021-11-03 04:28:33,556 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 04:28:33,557 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:28:33,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:28:33,557 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:28:33,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-11-03 04:28:34,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 04:28:34,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:28:34,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-03 04:28:34,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:28:34,703 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:28:34,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:28:35,127 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:28:35,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [955929399] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:28:35,127 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926134632] [2021-11-03 04:28:35,127 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 04:28:35,127 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:28:35,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:28:35,128 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:28:35,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-03 04:28:35,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 04:28:35,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:28:35,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-03 04:28:35,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:28:36,094 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:28:36,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:28:36,583 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:28:36,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926134632] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:28:36,584 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 04:28:36,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17, 17, 17, 17] total 34 [2021-11-03 04:28:36,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374535603] [2021-11-03 04:28:36,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-03 04:28:36,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:28:36,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-03 04:28:36,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=954, Unknown=0, NotChecked=0, Total=1260 [2021-11-03 04:28:36,588 INFO L87 Difference]: Start difference. First operand 2042 states and 6519 transitions. Second operand has 36 states, 35 states have (on average 1.3142857142857143) internal successors, (46), 35 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:29:31,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:29:31,223 INFO L93 Difference]: Finished difference Result 4085 states and 12667 transitions. [2021-11-03 04:29:31,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-11-03 04:29:31,229 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 1.3142857142857143) internal successors, (46), 35 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-11-03 04:29:31,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:29:31,262 INFO L225 Difference]: With dead ends: 4085 [2021-11-03 04:29:31,263 INFO L226 Difference]: Without dead ends: 4085 [2021-11-03 04:29:31,265 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 81 SyntacticMatches, 17 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1154 ImplicationChecksByTransitivity, 48.9s TimeCoverageRelationStatistics Valid=1345, Invalid=3625, Unknown=0, NotChecked=0, Total=4970 [2021-11-03 04:29:31,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4085 states. [2021-11-03 04:29:31,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4085 to 2321. [2021-11-03 04:29:31,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2321 states, 2320 states have (on average 3.2538793103448276) internal successors, (7549), 2320 states have internal predecessors, (7549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:29:31,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2321 states to 2321 states and 7549 transitions. [2021-11-03 04:29:31,387 INFO L78 Accepts]: Start accepts. Automaton has 2321 states and 7549 transitions. Word has length 23 [2021-11-03 04:29:31,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:29:31,388 INFO L470 AbstractCegarLoop]: Abstraction has 2321 states and 7549 transitions. [2021-11-03 04:29:31,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 1.3142857142857143) internal successors, (46), 35 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:29:31,388 INFO L276 IsEmpty]: Start isEmpty. Operand 2321 states and 7549 transitions. [2021-11-03 04:29:31,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-03 04:29:31,417 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:29:31,417 INFO L513 BasicCegarLoop]: trace histogram [14, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:29:31,454 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-03 04:29:31,648 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-03 04:29:31,841 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (16)] Ended with exit code 0 [2021-11-03 04:29:32,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt [2021-11-03 04:29:32,039 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-03 04:29:32,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:29:32,040 INFO L85 PathProgramCache]: Analyzing trace with hash 1009699741, now seen corresponding path program 3 times [2021-11-03 04:29:32,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:29:32,041 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1879645587] [2021-11-03 04:29:32,041 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-03 04:29:32,041 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:29:32,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:29:32,042 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:29:32,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-03 04:29:32,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-11-03 04:29:32,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:29:32,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-03 04:29:32,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:29:33,435 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:29:33,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:29:37,659 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:29:37,659 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:29:37,659 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1879645587] [2021-11-03 04:29:37,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1879645587] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:29:37,659 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [56071595] [2021-11-03 04:29:37,660 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-03 04:29:37,660 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:29:37,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:29:37,661 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:29:37,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-03 04:29:38,335 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-11-03 04:29:38,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:29:38,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-03 04:29:38,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:29:38,835 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:29:38,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:29:39,227 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:29:39,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [56071595] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:29:39,227 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103857644] [2021-11-03 04:29:39,227 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-03 04:29:39,228 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:29:39,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:29:39,228 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:29:39,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-03 04:29:39,758 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-11-03 04:29:39,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:29:39,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-03 04:29:39,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:29:40,323 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:29:40,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:29:40,743 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:29:40,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103857644] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:29:40,743 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 04:29:40,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17, 17, 17, 17] total 34 [2021-11-03 04:29:40,744 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632712990] [2021-11-03 04:29:40,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-03 04:29:40,744 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:29:40,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-03 04:29:40,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=308, Invalid=952, Unknown=0, NotChecked=0, Total=1260 [2021-11-03 04:29:40,746 INFO L87 Difference]: Start difference. First operand 2321 states and 7549 transitions. Second operand has 36 states, 35 states have (on average 1.3142857142857143) internal successors, (46), 35 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:30:34,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:30:34,212 INFO L93 Difference]: Finished difference Result 4699 states and 14784 transitions. [2021-11-03 04:30:34,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-11-03 04:30:34,218 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 1.3142857142857143) internal successors, (46), 35 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-11-03 04:30:34,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:30:34,276 INFO L225 Difference]: With dead ends: 4699 [2021-11-03 04:30:34,276 INFO L226 Difference]: Without dead ends: 4699 [2021-11-03 04:30:34,283 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 84 SyntacticMatches, 14 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1151 ImplicationChecksByTransitivity, 49.6s TimeCoverageRelationStatistics Valid=1433, Invalid=3823, Unknown=0, NotChecked=0, Total=5256 [2021-11-03 04:30:34,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4699 states. [2021-11-03 04:30:34,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4699 to 2753. [2021-11-03 04:30:34,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2753 states, 2752 states have (on average 3.315406976744186) internal successors, (9124), 2752 states have internal predecessors, (9124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:30:34,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2753 states to 2753 states and 9124 transitions. [2021-11-03 04:30:34,450 INFO L78 Accepts]: Start accepts. Automaton has 2753 states and 9124 transitions. Word has length 23 [2021-11-03 04:30:34,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:30:34,451 INFO L470 AbstractCegarLoop]: Abstraction has 2753 states and 9124 transitions. [2021-11-03 04:30:34,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 1.3142857142857143) internal successors, (46), 35 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:30:34,451 INFO L276 IsEmpty]: Start isEmpty. Operand 2753 states and 9124 transitions. [2021-11-03 04:30:34,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-03 04:30:34,460 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:30:34,460 INFO L513 BasicCegarLoop]: trace histogram [14, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:30:34,470 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2021-11-03 04:30:34,686 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-03 04:30:34,873 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2021-11-03 04:30:35,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:30:35,064 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-03 04:30:35,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:30:35,064 INFO L85 PathProgramCache]: Analyzing trace with hash -687545203, now seen corresponding path program 4 times [2021-11-03 04:30:35,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:30:35,065 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [790002345] [2021-11-03 04:30:35,065 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-03 04:30:35,065 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:30:35,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:30:35,070 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:30:35,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-03 04:30:35,549 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-03 04:30:35,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:30:35,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-03 04:30:35,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:30:36,459 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:30:36,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:30:40,459 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:30:40,459 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:30:40,460 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [790002345] [2021-11-03 04:30:40,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [790002345] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:30:40,460 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [782049619] [2021-11-03 04:30:40,460 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-03 04:30:40,460 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:30:40,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:30:40,461 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:30:40,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2021-11-03 04:30:41,224 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-03 04:30:41,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:30:41,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-03 04:30:41,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:30:41,880 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:30:41,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:30:42,415 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:30:42,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [782049619] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:30:42,415 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383279649] [2021-11-03 04:30:42,416 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-03 04:30:42,416 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:30:42,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:30:42,417 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:30:42,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-03 04:30:43,172 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-03 04:30:43,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:30:43,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-03 04:30:43,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:30:43,750 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:30:43,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:30:44,167 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:30:44,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383279649] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:30:44,167 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 04:30:44,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17, 17, 17, 17] total 34 [2021-11-03 04:30:44,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198687134] [2021-11-03 04:30:44,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-03 04:30:44,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:30:44,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-03 04:30:44,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=310, Invalid=950, Unknown=0, NotChecked=0, Total=1260 [2021-11-03 04:30:44,169 INFO L87 Difference]: Start difference. First operand 2753 states and 9124 transitions. Second operand has 36 states, 35 states have (on average 1.3142857142857143) internal successors, (46), 35 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:31:40,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:31:40,919 INFO L93 Difference]: Finished difference Result 5288 states and 16864 transitions. [2021-11-03 04:31:40,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-11-03 04:31:40,923 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 1.3142857142857143) internal successors, (46), 35 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-11-03 04:31:40,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:31:40,959 INFO L225 Difference]: With dead ends: 5288 [2021-11-03 04:31:40,959 INFO L226 Difference]: Without dead ends: 5288 [2021-11-03 04:31:40,961 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 83 SyntacticMatches, 15 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1262 ImplicationChecksByTransitivity, 52.4s TimeCoverageRelationStatistics Valid=1526, Invalid=4024, Unknown=0, NotChecked=0, Total=5550 [2021-11-03 04:31:40,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5288 states. [2021-11-03 04:31:41,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5288 to 3214. [2021-11-03 04:31:41,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3214 states, 3213 states have (on average 3.375661375661376) internal successors, (10846), 3213 states have internal predecessors, (10846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:31:41,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3214 states to 3214 states and 10846 transitions. [2021-11-03 04:31:41,130 INFO L78 Accepts]: Start accepts. Automaton has 3214 states and 10846 transitions. Word has length 23 [2021-11-03 04:31:41,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:31:41,132 INFO L470 AbstractCegarLoop]: Abstraction has 3214 states and 10846 transitions. [2021-11-03 04:31:41,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 1.3142857142857143) internal successors, (46), 35 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:31:41,133 INFO L276 IsEmpty]: Start isEmpty. Operand 3214 states and 10846 transitions. [2021-11-03 04:31:41,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-03 04:31:41,143 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:31:41,143 INFO L513 BasicCegarLoop]: trace histogram [14, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:31:41,197 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-11-03 04:31:41,385 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-03 04:31:41,574 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2021-11-03 04:31:41,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt [2021-11-03 04:31:41,767 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-03 04:31:41,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:31:41,768 INFO L85 PathProgramCache]: Analyzing trace with hash 227536285, now seen corresponding path program 5 times [2021-11-03 04:31:41,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:31:41,768 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1418200381] [2021-11-03 04:31:41,768 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-03 04:31:41,768 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:31:41,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:31:41,770 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:31:41,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-03 04:31:42,351 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-11-03 04:31:42,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:31:42,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-03 04:31:42,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:31:43,293 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:31:43,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:31:47,253 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:31:47,253 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:31:47,253 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1418200381] [2021-11-03 04:31:47,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1418200381] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:31:47,253 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1724410583] [2021-11-03 04:31:47,253 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-03 04:31:47,253 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:31:47,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:31:47,254 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:31:47,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2021-11-03 04:31:48,115 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-11-03 04:31:48,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:31:48,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-03 04:31:48,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:31:48,613 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:31:48,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:31:49,027 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:31:49,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1724410583] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:31:49,028 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926783705] [2021-11-03 04:31:49,028 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-03 04:31:49,028 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:31:49,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:31:49,029 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:31:49,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-03 04:31:49,762 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-11-03 04:31:49,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:31:49,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-03 04:31:49,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:31:50,298 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:31:50,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:31:50,776 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:31:50,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926783705] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:31:50,776 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 04:31:50,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17, 17, 17, 17] total 34 [2021-11-03 04:31:50,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67961004] [2021-11-03 04:31:50,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-03 04:31:50,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:31:50,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-03 04:31:50,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=312, Invalid=948, Unknown=0, NotChecked=0, Total=1260 [2021-11-03 04:31:50,778 INFO L87 Difference]: Start difference. First operand 3214 states and 10846 transitions. Second operand has 36 states, 35 states have (on average 1.3142857142857143) internal successors, (46), 35 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:32:58,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:32:58,956 INFO L93 Difference]: Finished difference Result 6009 states and 19430 transitions. [2021-11-03 04:32:58,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-11-03 04:32:58,960 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 1.3142857142857143) internal successors, (46), 35 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-11-03 04:32:58,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:32:58,984 INFO L225 Difference]: With dead ends: 6009 [2021-11-03 04:32:58,985 INFO L226 Difference]: Without dead ends: 6009 [2021-11-03 04:32:58,987 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 86 SyntacticMatches, 12 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1265 ImplicationChecksByTransitivity, 63.3s TimeCoverageRelationStatistics Valid=1635, Invalid=4217, Unknown=0, NotChecked=0, Total=5852 [2021-11-03 04:32:58,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6009 states. [2021-11-03 04:32:59,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6009 to 3716. [2021-11-03 04:32:59,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3716 states, 3715 states have (on average 3.4242261103633918) internal successors, (12721), 3715 states have internal predecessors, (12721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:32:59,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3716 states to 3716 states and 12721 transitions. [2021-11-03 04:32:59,201 INFO L78 Accepts]: Start accepts. Automaton has 3716 states and 12721 transitions. Word has length 23 [2021-11-03 04:32:59,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:32:59,202 INFO L470 AbstractCegarLoop]: Abstraction has 3716 states and 12721 transitions. [2021-11-03 04:32:59,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 1.3142857142857143) internal successors, (46), 35 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:32:59,202 INFO L276 IsEmpty]: Start isEmpty. Operand 3716 states and 12721 transitions. [2021-11-03 04:32:59,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-03 04:32:59,240 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:32:59,240 INFO L513 BasicCegarLoop]: trace histogram [14, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:32:59,264 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (25)] Forceful destruction successful, exit code 0 [2021-11-03 04:32:59,480 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-03 04:32:59,653 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-03 04:32:59,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:32:59,841 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-03 04:32:59,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:32:59,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1544060275, now seen corresponding path program 6 times [2021-11-03 04:32:59,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:32:59,842 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1511376314] [2021-11-03 04:32:59,842 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-03 04:32:59,842 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:32:59,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:32:59,847 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:32:59,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-03 04:33:00,669 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-11-03 04:33:00,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:33:00,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-03 04:33:00,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:33:01,558 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:33:01,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:33:06,339 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:33:06,339 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:33:06,339 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1511376314] [2021-11-03 04:33:06,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1511376314] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:33:06,339 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1408394121] [2021-11-03 04:33:06,339 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-03 04:33:06,340 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:33:06,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:33:06,341 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:33:06,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2021-11-03 04:33:07,371 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-11-03 04:33:07,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:33:07,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-03 04:33:07,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:33:07,930 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:33:07,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:33:08,383 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:33:08,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1408394121] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:33:08,383 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150874526] [2021-11-03 04:33:08,383 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-03 04:33:08,384 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:33:08,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:33:08,385 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:33:08,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-03 04:33:09,306 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-11-03 04:33:09,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:33:09,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-03 04:33:09,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:33:09,778 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:33:09,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:33:10,270 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:33:10,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150874526] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:33:10,271 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 04:33:10,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17, 17, 17, 17] total 34 [2021-11-03 04:33:10,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549129132] [2021-11-03 04:33:10,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-03 04:33:10,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:33:10,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-03 04:33:10,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=313, Invalid=947, Unknown=0, NotChecked=0, Total=1260 [2021-11-03 04:33:10,273 INFO L87 Difference]: Start difference. First operand 3716 states and 12721 transitions. Second operand has 36 states, 35 states have (on average 1.3142857142857143) internal successors, (46), 35 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:30,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:34:30,830 INFO L93 Difference]: Finished difference Result 6685 states and 21884 transitions. [2021-11-03 04:34:30,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-11-03 04:34:30,835 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 1.3142857142857143) internal successors, (46), 35 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-11-03 04:34:30,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:34:30,863 INFO L225 Difference]: With dead ends: 6685 [2021-11-03 04:34:30,863 INFO L226 Difference]: Without dead ends: 6685 [2021-11-03 04:34:30,866 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 83 SyntacticMatches, 15 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1459 ImplicationChecksByTransitivity, 72.5s TimeCoverageRelationStatistics Valid=1740, Invalid=4422, Unknown=0, NotChecked=0, Total=6162 [2021-11-03 04:34:30,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6685 states. [2021-11-03 04:34:31,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6685 to 4218. [2021-11-03 04:34:31,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4218 states, 4217 states have (on average 3.4704766421626747) internal successors, (14635), 4217 states have internal predecessors, (14635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:31,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4218 states to 4218 states and 14635 transitions. [2021-11-03 04:34:31,154 INFO L78 Accepts]: Start accepts. Automaton has 4218 states and 14635 transitions. Word has length 23 [2021-11-03 04:34:31,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:34:31,155 INFO L470 AbstractCegarLoop]: Abstraction has 4218 states and 14635 transitions. [2021-11-03 04:34:31,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 1.3142857142857143) internal successors, (46), 35 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:31,156 INFO L276 IsEmpty]: Start isEmpty. Operand 4218 states and 14635 transitions. [2021-11-03 04:34:31,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-03 04:34:31,181 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:34:31,181 INFO L513 BasicCegarLoop]: trace histogram [14, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:34:31,203 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (28)] Forceful destruction successful, exit code 0 [2021-11-03 04:34:31,402 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-03 04:34:31,606 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-11-03 04:34:31,782 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:34:31,782 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-03 04:34:31,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:34:31,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1462661219, now seen corresponding path program 7 times [2021-11-03 04:34:31,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:34:31,784 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [238034562] [2021-11-03 04:34:31,785 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-03 04:34:31,785 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:34:31,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:34:31,786 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:34:31,793 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-03 04:34:32,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:34:32,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-03 04:34:32,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:34:33,834 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:34:33,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:34:38,899 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:34:38,899 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:34:38,899 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [238034562] [2021-11-03 04:34:38,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [238034562] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:34:38,899 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1487585712] [2021-11-03 04:34:38,900 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-03 04:34:38,900 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:34:38,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:34:38,901 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:34:38,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2021-11-03 04:34:40,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:34:40,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-03 04:34:40,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:34:40,740 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:34:40,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:34:41,230 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:34:41,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1487585712] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:34:41,231 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287423350] [2021-11-03 04:34:41,231 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-03 04:34:41,231 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:34:41,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:34:41,239 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:34:41,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-03 04:34:42,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:34:42,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-03 04:34:42,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:34:42,971 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:34:42,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:34:43,485 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:34:43,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287423350] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:34:43,485 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 04:34:43,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17, 17, 17, 17] total 34 [2021-11-03 04:34:43,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811205312] [2021-11-03 04:34:43,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-03 04:34:43,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:34:43,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-03 04:34:43,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=313, Invalid=947, Unknown=0, NotChecked=0, Total=1260 [2021-11-03 04:34:43,488 INFO L87 Difference]: Start difference. First operand 4218 states and 14635 transitions. Second operand has 36 states, 35 states have (on average 1.3142857142857143) internal successors, (46), 35 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:36:12,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:36:12,116 INFO L93 Difference]: Finished difference Result 7338 states and 24292 transitions. [2021-11-03 04:36:12,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-11-03 04:36:12,119 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 1.3142857142857143) internal successors, (46), 35 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-11-03 04:36:12,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:36:12,151 INFO L225 Difference]: With dead ends: 7338 [2021-11-03 04:36:12,152 INFO L226 Difference]: Without dead ends: 7338 [2021-11-03 04:36:12,155 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 79 SyntacticMatches, 19 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1708 ImplicationChecksByTransitivity, 81.5s TimeCoverageRelationStatistics Valid=1816, Invalid=4664, Unknown=0, NotChecked=0, Total=6480 [2021-11-03 04:36:12,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7338 states. [2021-11-03 04:36:12,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7338 to 4688. [2021-11-03 04:36:12,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4688 states, 4687 states have (on average 3.5058672925112013) internal successors, (16432), 4687 states have internal predecessors, (16432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:36:12,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4688 states to 4688 states and 16432 transitions. [2021-11-03 04:36:12,548 INFO L78 Accepts]: Start accepts. Automaton has 4688 states and 16432 transitions. Word has length 23 [2021-11-03 04:36:12,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:36:12,549 INFO L470 AbstractCegarLoop]: Abstraction has 4688 states and 16432 transitions. [2021-11-03 04:36:12,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 1.3142857142857143) internal successors, (46), 35 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:36:12,549 INFO L276 IsEmpty]: Start isEmpty. Operand 4688 states and 16432 transitions. [2021-11-03 04:36:12,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-03 04:36:12,575 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:36:12,576 INFO L513 BasicCegarLoop]: trace histogram [14, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:36:12,626 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-11-03 04:36:12,816 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (30)] Ended with exit code 0 [2021-11-03 04:36:13,007 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (31)] Forceful destruction successful, exit code 0 [2021-11-03 04:36:13,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt [2021-11-03 04:36:13,203 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-03 04:36:13,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:36:13,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1460035443, now seen corresponding path program 8 times [2021-11-03 04:36:13,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:36:13,204 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [797675802] [2021-11-03 04:36:13,204 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 04:36:13,205 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:36:13,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:36:13,206 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:36:13,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-11-03 04:36:14,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 04:36:14,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:36:14,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-03 04:36:14,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:36:15,241 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:36:15,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:36:19,787 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:36:19,787 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:36:19,788 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [797675802] [2021-11-03 04:36:19,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [797675802] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:36:19,788 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [848498278] [2021-11-03 04:36:19,788 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 04:36:19,788 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:36:19,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:36:19,789 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:36:19,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2021-11-03 04:36:21,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 04:36:21,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:36:21,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-03 04:36:21,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:36:21,695 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:36:21,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:36:22,109 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:36:22,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [848498278] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:36:22,110 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780730292] [2021-11-03 04:36:22,110 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 04:36:22,110 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:36:22,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:36:22,111 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:36:22,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-03 04:36:23,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 04:36:23,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:36:23,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-03 04:36:23,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:36:23,830 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:36:23,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:36:24,248 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:36:24,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780730292] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:36:24,248 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 04:36:24,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17, 17, 17, 17] total 34 [2021-11-03 04:36:24,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962737876] [2021-11-03 04:36:24,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-03 04:36:24,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:36:24,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-03 04:36:24,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=313, Invalid=947, Unknown=0, NotChecked=0, Total=1260 [2021-11-03 04:36:24,250 INFO L87 Difference]: Start difference. First operand 4688 states and 16432 transitions. Second operand has 36 states, 35 states have (on average 1.3142857142857143) internal successors, (46), 35 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:37:44,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:37:44,607 INFO L93 Difference]: Finished difference Result 7885 states and 26375 transitions. [2021-11-03 04:37:44,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-11-03 04:37:44,609 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 1.3142857142857143) internal successors, (46), 35 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-11-03 04:37:44,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:37:44,624 INFO L225 Difference]: With dead ends: 7885 [2021-11-03 04:37:44,624 INFO L226 Difference]: Without dead ends: 7885 [2021-11-03 04:37:44,627 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 80 SyntacticMatches, 18 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1723 ImplicationChecksByTransitivity, 72.5s TimeCoverageRelationStatistics Valid=1836, Invalid=4806, Unknown=0, NotChecked=0, Total=6642 [2021-11-03 04:37:44,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7885 states. [2021-11-03 04:37:44,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7885 to 5119. [2021-11-03 04:37:44,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5119 states, 5118 states have (on average 3.541227041813208) internal successors, (18124), 5118 states have internal predecessors, (18124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:37:44,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5119 states to 5119 states and 18124 transitions. [2021-11-03 04:37:44,915 INFO L78 Accepts]: Start accepts. Automaton has 5119 states and 18124 transitions. Word has length 23 [2021-11-03 04:37:44,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:37:44,916 INFO L470 AbstractCegarLoop]: Abstraction has 5119 states and 18124 transitions. [2021-11-03 04:37:44,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 1.3142857142857143) internal successors, (46), 35 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:37:44,916 INFO L276 IsEmpty]: Start isEmpty. Operand 5119 states and 18124 transitions. [2021-11-03 04:37:44,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-03 04:37:44,942 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:37:44,943 INFO L513 BasicCegarLoop]: trace histogram [14, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:37:45,011 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-11-03 04:37:45,172 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (33)] Ended with exit code 0 [2021-11-03 04:37:45,364 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (34)] Forceful destruction successful, exit code 0 [2021-11-03 04:37:45,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt [2021-11-03 04:37:45,559 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-03 04:37:45,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:37:45,560 INFO L85 PathProgramCache]: Analyzing trace with hash 202617245, now seen corresponding path program 9 times [2021-11-03 04:37:45,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:37:45,561 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1060874560] [2021-11-03 04:37:45,561 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-03 04:37:45,561 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:37:45,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:37:45,563 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:37:45,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-11-03 04:37:46,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-03 04:37:46,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:37:46,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-03 04:37:46,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:37:47,531 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:37:47,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:37:52,044 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:37:52,044 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:37:52,044 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1060874560] [2021-11-03 04:37:52,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1060874560] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:37:52,044 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [655046235] [2021-11-03 04:37:52,045 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-03 04:37:52,045 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:37:52,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:37:52,046 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:37:52,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2021-11-03 04:37:53,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-03 04:37:53,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:37:53,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-03 04:37:53,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:37:54,018 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:37:54,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:37:54,590 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:37:54,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [655046235] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:37:54,590 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552595805] [2021-11-03 04:37:54,590 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-03 04:37:54,591 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:37:54,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:37:54,592 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:37:54,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-11-03 04:37:55,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-03 04:37:55,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:37:55,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-03 04:37:55,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:37:56,297 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:37:56,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:37:57,053 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:37:57,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552595805] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:37:57,054 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 04:37:57,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17, 17, 17, 17] total 34 [2021-11-03 04:37:57,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315757332] [2021-11-03 04:37:57,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-03 04:37:57,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:37:57,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-03 04:37:57,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=313, Invalid=947, Unknown=0, NotChecked=0, Total=1260 [2021-11-03 04:37:57,056 INFO L87 Difference]: Start difference. First operand 5119 states and 18124 transitions. Second operand has 36 states, 35 states have (on average 1.3142857142857143) internal successors, (46), 35 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:39:16,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:39:16,695 INFO L93 Difference]: Finished difference Result 8377 states and 28227 transitions. [2021-11-03 04:39:16,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-11-03 04:39:16,697 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 1.3142857142857143) internal successors, (46), 35 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-11-03 04:39:16,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:39:16,713 INFO L225 Difference]: With dead ends: 8377 [2021-11-03 04:39:16,714 INFO L226 Difference]: Without dead ends: 8377 [2021-11-03 04:39:16,714 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 86 SyntacticMatches, 12 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1526 ImplicationChecksByTransitivity, 72.6s TimeCoverageRelationStatistics Valid=1839, Invalid=4803, Unknown=0, NotChecked=0, Total=6642 [2021-11-03 04:39:16,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8377 states. [2021-11-03 04:39:16,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8377 to 5456. [2021-11-03 04:39:16,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5456 states, 5455 states have (on average 3.569019248395967) internal successors, (19469), 5455 states have internal predecessors, (19469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:39:17,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5456 states to 5456 states and 19469 transitions. [2021-11-03 04:39:17,030 INFO L78 Accepts]: Start accepts. Automaton has 5456 states and 19469 transitions. Word has length 23 [2021-11-03 04:39:17,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:39:17,031 INFO L470 AbstractCegarLoop]: Abstraction has 5456 states and 19469 transitions. [2021-11-03 04:39:17,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 1.3142857142857143) internal successors, (46), 35 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:39:17,031 INFO L276 IsEmpty]: Start isEmpty. Operand 5456 states and 19469 transitions. [2021-11-03 04:39:17,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-03 04:39:17,059 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:39:17,060 INFO L513 BasicCegarLoop]: trace histogram [14, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:39:17,095 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2021-11-03 04:39:17,309 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-11-03 04:39:17,486 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (37)] Forceful destruction successful, exit code 0 [2021-11-03 04:39:17,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt [2021-11-03 04:39:17,678 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-03 04:39:17,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:39:17,678 INFO L85 PathProgramCache]: Analyzing trace with hash -1544864115, now seen corresponding path program 10 times [2021-11-03 04:39:17,679 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:39:17,679 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2033024395] [2021-11-03 04:39:17,679 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-03 04:39:17,679 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:39:17,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:39:17,682 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:39:17,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2021-11-03 04:39:18,903 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-03 04:39:18,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:39:18,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-03 04:39:18,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:39:19,725 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:39:19,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:39:24,264 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:39:24,265 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:39:24,265 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2033024395] [2021-11-03 04:39:24,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2033024395] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:39:24,265 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [928018645] [2021-11-03 04:39:24,265 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-03 04:39:24,265 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:39:24,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:39:24,266 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:39:24,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe95dda-a9ea-4f68-b354-e181560dadc6/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (40)] Waiting until timeout for monitored process