./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-bad-counter-queue.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4910639-ac59-4062-a396-551ca6d3411f/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4910639-ac59-4062-a396-551ca6d3411f/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4910639-ac59-4062-a396-551ca6d3411f/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4910639-ac59-4062-a396-551ca6d3411f/bin/uautomizer-tPACEb0tL8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-counter-queue.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4910639-ac59-4062-a396-551ca6d3411f/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4910639-ac59-4062-a396-551ca6d3411f/bin/uautomizer-tPACEb0tL8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c642b478618f67be61772197bb614a61e988cb880f57faee5dd0470714f61e7e --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-e04fb08 [2022-11-16 11:08:21,289 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 11:08:21,294 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 11:08:21,317 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 11:08:21,317 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 11:08:21,319 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 11:08:21,321 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 11:08:21,323 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 11:08:21,325 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 11:08:21,326 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 11:08:21,328 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 11:08:21,329 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 11:08:21,330 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 11:08:21,331 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 11:08:21,333 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 11:08:21,334 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 11:08:21,335 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 11:08:21,337 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 11:08:21,339 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 11:08:21,341 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 11:08:21,343 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 11:08:21,345 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 11:08:21,347 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 11:08:21,348 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 11:08:21,353 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 11:08:21,353 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 11:08:21,354 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 11:08:21,355 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 11:08:21,356 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 11:08:21,357 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 11:08:21,357 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 11:08:21,358 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 11:08:21,359 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 11:08:21,360 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 11:08:21,362 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 11:08:21,362 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 11:08:21,363 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 11:08:21,363 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 11:08:21,364 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 11:08:21,365 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 11:08:21,366 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 11:08:21,367 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4910639-ac59-4062-a396-551ca6d3411f/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-16 11:08:21,430 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 11:08:21,430 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 11:08:21,430 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 11:08:21,431 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 11:08:21,431 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 11:08:21,432 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 11:08:21,432 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 11:08:21,433 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 11:08:21,433 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 11:08:21,433 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 11:08:21,433 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 11:08:21,434 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 11:08:21,434 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 11:08:21,434 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 11:08:21,434 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 11:08:21,434 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 11:08:21,435 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 11:08:21,435 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 11:08:21,435 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 11:08:21,435 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 11:08:21,435 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 11:08:21,436 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 11:08:21,436 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 11:08:21,436 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 11:08:21,436 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:08:21,437 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 11:08:21,437 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 11:08:21,437 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 11:08:21,437 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 11:08:21,437 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 11:08:21,438 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-16 11:08:21,438 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-16 11:08:21,438 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 11:08:21,438 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_f4910639-ac59-4062-a396-551ca6d3411f/bin/uautomizer-tPACEb0tL8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4910639-ac59-4062-a396-551ca6d3411f/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c642b478618f67be61772197bb614a61e988cb880f57faee5dd0470714f61e7e [2022-11-16 11:08:21,813 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 11:08:21,850 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 11:08:21,853 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 11:08:21,855 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 11:08:21,856 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 11:08:21,857 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4910639-ac59-4062-a396-551ca6d3411f/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/weaver/popl20-bad-counter-queue.wvr.c [2022-11-16 11:08:21,943 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4910639-ac59-4062-a396-551ca6d3411f/bin/uautomizer-tPACEb0tL8/data/4831163ce/8928ddf6ec03407d90a8c947be20ff4f/FLAGede8151e9 [2022-11-16 11:08:22,623 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 11:08:22,625 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4910639-ac59-4062-a396-551ca6d3411f/sv-benchmarks/c/weaver/popl20-bad-counter-queue.wvr.c [2022-11-16 11:08:22,636 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4910639-ac59-4062-a396-551ca6d3411f/bin/uautomizer-tPACEb0tL8/data/4831163ce/8928ddf6ec03407d90a8c947be20ff4f/FLAGede8151e9 [2022-11-16 11:08:22,943 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4910639-ac59-4062-a396-551ca6d3411f/bin/uautomizer-tPACEb0tL8/data/4831163ce/8928ddf6ec03407d90a8c947be20ff4f [2022-11-16 11:08:22,946 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 11:08:22,947 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 11:08:22,949 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 11:08:22,949 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 11:08:22,953 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 11:08:22,953 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:08:22" (1/1) ... [2022-11-16 11:08:22,955 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1cfdd34d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:08:22, skipping insertion in model container [2022-11-16 11:08:22,955 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:08:22" (1/1) ... [2022-11-16 11:08:22,963 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 11:08:22,982 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 11:08:23,196 WARN L229 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_f4910639-ac59-4062-a396-551ca6d3411f/sv-benchmarks/c/weaver/popl20-bad-counter-queue.wvr.c[2428,2441] [2022-11-16 11:08:23,208 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:08:23,218 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 11:08:23,241 WARN L229 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_f4910639-ac59-4062-a396-551ca6d3411f/sv-benchmarks/c/weaver/popl20-bad-counter-queue.wvr.c[2428,2441] [2022-11-16 11:08:23,248 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:08:23,266 INFO L208 MainTranslator]: Completed translation [2022-11-16 11:08:23,267 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:08:23 WrapperNode [2022-11-16 11:08:23,267 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 11:08:23,268 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 11:08:23,268 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 11:08:23,268 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 11:08:23,277 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:08:23" (1/1) ... [2022-11-16 11:08:23,285 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:08:23" (1/1) ... [2022-11-16 11:08:23,321 INFO L138 Inliner]: procedures = 26, calls = 40, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 144 [2022-11-16 11:08:23,327 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 11:08:23,328 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 11:08:23,328 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 11:08:23,328 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 11:08:23,338 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:08:23" (1/1) ... [2022-11-16 11:08:23,339 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:08:23" (1/1) ... [2022-11-16 11:08:23,341 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:08:23" (1/1) ... [2022-11-16 11:08:23,342 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:08:23" (1/1) ... [2022-11-16 11:08:23,349 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:08:23" (1/1) ... [2022-11-16 11:08:23,353 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:08:23" (1/1) ... [2022-11-16 11:08:23,356 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:08:23" (1/1) ... [2022-11-16 11:08:23,357 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:08:23" (1/1) ... [2022-11-16 11:08:23,360 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 11:08:23,361 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 11:08:23,361 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 11:08:23,361 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 11:08:23,362 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:08:23" (1/1) ... [2022-11-16 11:08:23,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:08:23,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4910639-ac59-4062-a396-551ca6d3411f/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:08:23,400 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4910639-ac59-4062-a396-551ca6d3411f/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 11:08:23,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4910639-ac59-4062-a396-551ca6d3411f/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 11:08:23,454 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 11:08:23,455 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 11:08:23,455 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 11:08:23,456 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 11:08:23,457 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-16 11:08:23,458 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-16 11:08:23,458 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-16 11:08:23,458 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-16 11:08:23,459 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 11:08:23,459 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-16 11:08:23,459 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-16 11:08:23,460 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-16 11:08:23,460 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 11:08:23,460 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 11:08:23,460 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 11:08:23,462 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-16 11:08:23,634 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 11:08:23,638 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 11:08:24,033 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 11:08:24,264 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 11:08:24,265 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-16 11:08:24,267 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:08:24 BoogieIcfgContainer [2022-11-16 11:08:24,268 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 11:08:24,271 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 11:08:24,271 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 11:08:24,275 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 11:08:24,275 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 11:08:22" (1/3) ... [2022-11-16 11:08:24,276 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7552f53c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:08:24, skipping insertion in model container [2022-11-16 11:08:24,277 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:08:23" (2/3) ... [2022-11-16 11:08:24,277 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7552f53c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:08:24, skipping insertion in model container [2022-11-16 11:08:24,277 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:08:24" (3/3) ... [2022-11-16 11:08:24,279 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-counter-queue.wvr.c [2022-11-16 11:08:24,289 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-16 11:08:24,302 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 11:08:24,303 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 11:08:24,303 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-16 11:08:24,368 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-16 11:08:24,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 117 places, 119 transitions, 254 flow [2022-11-16 11:08:24,484 INFO L130 PetriNetUnfolder]: 9/117 cut-off events. [2022-11-16 11:08:24,485 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-16 11:08:24,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126 conditions, 117 events. 9/117 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 68 event pairs, 0 based on Foata normal form. 0/107 useless extension candidates. Maximal degree in co-relation 81. Up to 2 conditions per place. [2022-11-16 11:08:24,492 INFO L82 GeneralOperation]: Start removeDead. Operand has 117 places, 119 transitions, 254 flow [2022-11-16 11:08:24,497 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 106 places, 108 transitions, 228 flow [2022-11-16 11:08:24,509 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 11:08:24,516 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@4bf019bb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 11:08:24,517 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-16 11:08:24,557 INFO L130 PetriNetUnfolder]: 9/107 cut-off events. [2022-11-16 11:08:24,557 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-16 11:08:24,558 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:08:24,559 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:08:24,559 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:08:24,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:08:24,565 INFO L85 PathProgramCache]: Analyzing trace with hash 57616117, now seen corresponding path program 1 times [2022-11-16 11:08:24,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:08:24,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579427750] [2022-11-16 11:08:24,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:08:24,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:08:24,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:08:24,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:08:24,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:08:24,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579427750] [2022-11-16 11:08:24,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579427750] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:08:24,836 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:08:24,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:08:24,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144789523] [2022-11-16 11:08:24,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:08:24,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 11:08:24,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:08:24,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 11:08:24,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 11:08:24,907 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 119 [2022-11-16 11:08:24,913 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 108 transitions, 228 flow. Second operand has 2 states, 2 states have (on average 109.5) internal successors, (219), 2 states have internal predecessors, (219), 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) [2022-11-16 11:08:24,913 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:08:24,914 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 119 [2022-11-16 11:08:24,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:08:25,018 INFO L130 PetriNetUnfolder]: 12/138 cut-off events. [2022-11-16 11:08:25,019 INFO L131 PetriNetUnfolder]: For 21/22 co-relation queries the response was YES. [2022-11-16 11:08:25,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 172 conditions, 138 events. 12/138 cut-off events. For 21/22 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 183 event pairs, 3 based on Foata normal form. 13/140 useless extension candidates. Maximal degree in co-relation 79. Up to 19 conditions per place. [2022-11-16 11:08:25,022 INFO L137 encePairwiseOnDemand]: 113/119 looper letters, 6 selfloop transitions, 0 changer transitions 3/102 dead transitions. [2022-11-16 11:08:25,022 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 102 transitions, 228 flow [2022-11-16 11:08:25,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 11:08:25,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-16 11:08:25,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 224 transitions. [2022-11-16 11:08:25,045 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9411764705882353 [2022-11-16 11:08:25,046 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 224 transitions. [2022-11-16 11:08:25,047 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 224 transitions. [2022-11-16 11:08:25,048 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:08:25,051 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 224 transitions. [2022-11-16 11:08:25,056 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 112.0) internal successors, (224), 2 states have internal predecessors, (224), 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) [2022-11-16 11:08:25,062 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 119.0) internal successors, (357), 3 states have internal predecessors, (357), 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) [2022-11-16 11:08:25,062 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 119.0) internal successors, (357), 3 states have internal predecessors, (357), 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) [2022-11-16 11:08:25,064 INFO L175 Difference]: Start difference. First operand has 106 places, 108 transitions, 228 flow. Second operand 2 states and 224 transitions. [2022-11-16 11:08:25,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 102 transitions, 228 flow [2022-11-16 11:08:25,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 102 transitions, 220 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-16 11:08:25,072 INFO L231 Difference]: Finished difference. Result has 103 places, 99 transitions, 202 flow [2022-11-16 11:08:25,075 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=119, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=202, PETRI_PLACES=103, PETRI_TRANSITIONS=99} [2022-11-16 11:08:25,079 INFO L288 CegarLoopForPetriNet]: 106 programPoint places, -3 predicate places. [2022-11-16 11:08:25,080 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 99 transitions, 202 flow [2022-11-16 11:08:25,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 109.5) internal successors, (219), 2 states have internal predecessors, (219), 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) [2022-11-16 11:08:25,080 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:08:25,081 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:08:25,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 11:08:25,082 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:08:25,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:08:25,083 INFO L85 PathProgramCache]: Analyzing trace with hash -1729578090, now seen corresponding path program 1 times [2022-11-16 11:08:25,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:08:25,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910182039] [2022-11-16 11:08:25,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:08:25,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:08:25,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:08:25,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:08:25,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:08:25,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910182039] [2022-11-16 11:08:25,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910182039] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:08:25,557 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:08:25,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 11:08:25,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680661428] [2022-11-16 11:08:25,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:08:25,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:08:25,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:08:25,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:08:25,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:08:25,571 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 119 [2022-11-16 11:08:25,572 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 99 transitions, 202 flow. Second operand has 5 states, 5 states have (on average 91.4) internal successors, (457), 5 states have internal predecessors, (457), 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) [2022-11-16 11:08:25,573 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:08:25,579 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 119 [2022-11-16 11:08:25,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:08:25,775 INFO L130 PetriNetUnfolder]: 26/181 cut-off events. [2022-11-16 11:08:25,775 INFO L131 PetriNetUnfolder]: For 10/11 co-relation queries the response was YES. [2022-11-16 11:08:25,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 251 conditions, 181 events. 26/181 cut-off events. For 10/11 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 438 event pairs, 6 based on Foata normal form. 1/171 useless extension candidates. Maximal degree in co-relation 248. Up to 39 conditions per place. [2022-11-16 11:08:25,779 INFO L137 encePairwiseOnDemand]: 113/119 looper letters, 24 selfloop transitions, 3 changer transitions 4/109 dead transitions. [2022-11-16 11:08:25,779 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 109 transitions, 287 flow [2022-11-16 11:08:25,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:08:25,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-16 11:08:25,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 472 transitions. [2022-11-16 11:08:25,787 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7932773109243697 [2022-11-16 11:08:25,787 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 472 transitions. [2022-11-16 11:08:25,787 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 472 transitions. [2022-11-16 11:08:25,788 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:08:25,788 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 472 transitions. [2022-11-16 11:08:25,790 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 94.4) internal successors, (472), 5 states have internal predecessors, (472), 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) [2022-11-16 11:08:25,792 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 119.0) internal successors, (714), 6 states have internal predecessors, (714), 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) [2022-11-16 11:08:25,793 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 119.0) internal successors, (714), 6 states have internal predecessors, (714), 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) [2022-11-16 11:08:25,793 INFO L175 Difference]: Start difference. First operand has 103 places, 99 transitions, 202 flow. Second operand 5 states and 472 transitions. [2022-11-16 11:08:25,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 109 transitions, 287 flow [2022-11-16 11:08:25,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 109 transitions, 287 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-16 11:08:25,801 INFO L231 Difference]: Finished difference. Result has 107 places, 101 transitions, 225 flow [2022-11-16 11:08:25,801 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=119, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=225, PETRI_PLACES=107, PETRI_TRANSITIONS=101} [2022-11-16 11:08:25,803 INFO L288 CegarLoopForPetriNet]: 106 programPoint places, 1 predicate places. [2022-11-16 11:08:25,803 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 101 transitions, 225 flow [2022-11-16 11:08:25,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 91.4) internal successors, (457), 5 states have internal predecessors, (457), 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) [2022-11-16 11:08:25,804 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:08:25,804 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:08:25,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 11:08:25,805 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:08:25,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:08:25,806 INFO L85 PathProgramCache]: Analyzing trace with hash 2133352904, now seen corresponding path program 1 times [2022-11-16 11:08:25,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:08:25,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038046955] [2022-11-16 11:08:25,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:08:25,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:08:25,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:08:26,136 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:08:26,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:08:26,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038046955] [2022-11-16 11:08:26,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038046955] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:08:26,141 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:08:26,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-16 11:08:26,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534108970] [2022-11-16 11:08:26,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:08:26,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 11:08:26,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:08:26,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 11:08:26,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:08:26,147 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 119 [2022-11-16 11:08:26,148 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 101 transitions, 225 flow. Second operand has 7 states, 7 states have (on average 88.0) internal successors, (616), 7 states have internal predecessors, (616), 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) [2022-11-16 11:08:26,148 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:08:26,148 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 119 [2022-11-16 11:08:26,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:08:26,452 INFO L130 PetriNetUnfolder]: 95/406 cut-off events. [2022-11-16 11:08:26,452 INFO L131 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2022-11-16 11:08:26,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 669 conditions, 406 events. 95/406 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1817 event pairs, 42 based on Foata normal form. 0/356 useless extension candidates. Maximal degree in co-relation 662. Up to 136 conditions per place. [2022-11-16 11:08:26,459 INFO L137 encePairwiseOnDemand]: 110/119 looper letters, 37 selfloop transitions, 8 changer transitions 0/119 dead transitions. [2022-11-16 11:08:26,460 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 119 transitions, 356 flow [2022-11-16 11:08:26,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 11:08:26,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-16 11:08:26,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 726 transitions. [2022-11-16 11:08:26,465 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7626050420168067 [2022-11-16 11:08:26,466 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 726 transitions. [2022-11-16 11:08:26,468 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 726 transitions. [2022-11-16 11:08:26,469 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:08:26,469 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 726 transitions. [2022-11-16 11:08:26,473 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 90.75) internal successors, (726), 8 states have internal predecessors, (726), 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) [2022-11-16 11:08:26,479 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 119.0) internal successors, (1071), 9 states have internal predecessors, (1071), 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) [2022-11-16 11:08:26,480 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 119.0) internal successors, (1071), 9 states have internal predecessors, (1071), 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) [2022-11-16 11:08:26,480 INFO L175 Difference]: Start difference. First operand has 107 places, 101 transitions, 225 flow. Second operand 8 states and 726 transitions. [2022-11-16 11:08:26,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 119 transitions, 356 flow [2022-11-16 11:08:26,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 119 transitions, 349 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-11-16 11:08:26,489 INFO L231 Difference]: Finished difference. Result has 112 places, 104 transitions, 254 flow [2022-11-16 11:08:26,489 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=119, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=254, PETRI_PLACES=112, PETRI_TRANSITIONS=104} [2022-11-16 11:08:26,492 INFO L288 CegarLoopForPetriNet]: 106 programPoint places, 6 predicate places. [2022-11-16 11:08:26,493 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 104 transitions, 254 flow [2022-11-16 11:08:26,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 88.0) internal successors, (616), 7 states have internal predecessors, (616), 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) [2022-11-16 11:08:26,494 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:08:26,494 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:08:26,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-16 11:08:26,495 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:08:26,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:08:26,496 INFO L85 PathProgramCache]: Analyzing trace with hash -453631722, now seen corresponding path program 1 times [2022-11-16 11:08:26,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:08:26,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971222068] [2022-11-16 11:08:26,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:08:26,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:08:26,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:08:26,825 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:08:26,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:08:26,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971222068] [2022-11-16 11:08:26,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971222068] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:08:26,827 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:08:26,827 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-16 11:08:26,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800837311] [2022-11-16 11:08:26,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:08:26,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 11:08:26,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:08:26,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 11:08:26,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:08:26,841 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 119 [2022-11-16 11:08:26,842 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 104 transitions, 254 flow. Second operand has 7 states, 7 states have (on average 88.0) internal successors, (616), 7 states have internal predecessors, (616), 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) [2022-11-16 11:08:26,843 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:08:26,843 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 119 [2022-11-16 11:08:26,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:08:27,072 INFO L130 PetriNetUnfolder]: 81/330 cut-off events. [2022-11-16 11:08:27,072 INFO L131 PetriNetUnfolder]: For 48/51 co-relation queries the response was YES. [2022-11-16 11:08:27,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 574 conditions, 330 events. 81/330 cut-off events. For 48/51 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1282 event pairs, 48 based on Foata normal form. 3/308 useless extension candidates. Maximal degree in co-relation 566. Up to 144 conditions per place. [2022-11-16 11:08:27,077 INFO L137 encePairwiseOnDemand]: 110/119 looper letters, 25 selfloop transitions, 6 changer transitions 11/116 dead transitions. [2022-11-16 11:08:27,077 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 116 transitions, 365 flow [2022-11-16 11:08:27,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 11:08:27,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-16 11:08:27,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 722 transitions. [2022-11-16 11:08:27,080 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7584033613445378 [2022-11-16 11:08:27,081 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 722 transitions. [2022-11-16 11:08:27,081 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 722 transitions. [2022-11-16 11:08:27,083 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:08:27,088 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 722 transitions. [2022-11-16 11:08:27,090 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 90.25) internal successors, (722), 8 states have internal predecessors, (722), 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) [2022-11-16 11:08:27,094 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 119.0) internal successors, (1071), 9 states have internal predecessors, (1071), 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) [2022-11-16 11:08:27,095 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 119.0) internal successors, (1071), 9 states have internal predecessors, (1071), 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) [2022-11-16 11:08:27,095 INFO L175 Difference]: Start difference. First operand has 112 places, 104 transitions, 254 flow. Second operand 8 states and 722 transitions. [2022-11-16 11:08:27,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 116 transitions, 365 flow [2022-11-16 11:08:27,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 116 transitions, 355 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-16 11:08:27,104 INFO L231 Difference]: Finished difference. Result has 117 places, 102 transitions, 248 flow [2022-11-16 11:08:27,105 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=119, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=248, PETRI_PLACES=117, PETRI_TRANSITIONS=102} [2022-11-16 11:08:27,108 INFO L288 CegarLoopForPetriNet]: 106 programPoint places, 11 predicate places. [2022-11-16 11:08:27,108 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 102 transitions, 248 flow [2022-11-16 11:08:27,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 88.0) internal successors, (616), 7 states have internal predecessors, (616), 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) [2022-11-16 11:08:27,109 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:08:27,109 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:08:27,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-16 11:08:27,110 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:08:27,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:08:27,111 INFO L85 PathProgramCache]: Analyzing trace with hash -903377404, now seen corresponding path program 1 times [2022-11-16 11:08:27,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:08:27,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803045470] [2022-11-16 11:08:27,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:08:27,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:08:27,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:08:27,381 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:08:27,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:08:27,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803045470] [2022-11-16 11:08:27,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803045470] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:08:27,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359711416] [2022-11-16 11:08:27,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:08:27,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:08:27,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4910639-ac59-4062-a396-551ca6d3411f/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:08:27,387 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4910639-ac59-4062-a396-551ca6d3411f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:08:27,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4910639-ac59-4062-a396-551ca6d3411f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 11:08:27,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:08:27,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 11:08:27,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:08:27,811 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:08:27,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:08:28,132 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:08:28,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359711416] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 11:08:28,134 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:08:28,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 7] total 14 [2022-11-16 11:08:28,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580714374] [2022-11-16 11:08:28,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:08:28,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 11:08:28,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:08:28,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 11:08:28,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2022-11-16 11:08:28,139 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 119 [2022-11-16 11:08:28,140 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 102 transitions, 248 flow. Second operand has 7 states, 7 states have (on average 88.28571428571429) internal successors, (618), 7 states have internal predecessors, (618), 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) [2022-11-16 11:08:28,141 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:08:28,141 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 119 [2022-11-16 11:08:28,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:08:28,342 INFO L130 PetriNetUnfolder]: 70/263 cut-off events. [2022-11-16 11:08:28,342 INFO L131 PetriNetUnfolder]: For 56/56 co-relation queries the response was YES. [2022-11-16 11:08:28,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 499 conditions, 263 events. 70/263 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 855 event pairs, 17 based on Foata normal form. 9/265 useless extension candidates. Maximal degree in co-relation 489. Up to 79 conditions per place. [2022-11-16 11:08:28,345 INFO L137 encePairwiseOnDemand]: 111/119 looper letters, 27 selfloop transitions, 7 changer transitions 0/108 dead transitions. [2022-11-16 11:08:28,345 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 108 transitions, 333 flow [2022-11-16 11:08:28,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:08:28,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-16 11:08:28,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 629 transitions. [2022-11-16 11:08:28,348 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7551020408163265 [2022-11-16 11:08:28,348 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 629 transitions. [2022-11-16 11:08:28,349 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 629 transitions. [2022-11-16 11:08:28,349 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:08:28,349 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 629 transitions. [2022-11-16 11:08:28,351 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 89.85714285714286) internal successors, (629), 7 states have internal predecessors, (629), 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) [2022-11-16 11:08:28,353 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 119.0) internal successors, (952), 8 states have internal predecessors, (952), 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) [2022-11-16 11:08:28,354 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 119.0) internal successors, (952), 8 states have internal predecessors, (952), 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) [2022-11-16 11:08:28,354 INFO L175 Difference]: Start difference. First operand has 117 places, 102 transitions, 248 flow. Second operand 7 states and 629 transitions. [2022-11-16 11:08:28,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 108 transitions, 333 flow [2022-11-16 11:08:28,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 108 transitions, 307 flow, removed 7 selfloop flow, removed 9 redundant places. [2022-11-16 11:08:28,358 INFO L231 Difference]: Finished difference. Result has 113 places, 104 transitions, 259 flow [2022-11-16 11:08:28,359 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=119, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=259, PETRI_PLACES=113, PETRI_TRANSITIONS=104} [2022-11-16 11:08:28,359 INFO L288 CegarLoopForPetriNet]: 106 programPoint places, 7 predicate places. [2022-11-16 11:08:28,360 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 104 transitions, 259 flow [2022-11-16 11:08:28,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 88.28571428571429) internal successors, (618), 7 states have internal predecessors, (618), 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) [2022-11-16 11:08:28,360 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:08:28,361 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:08:28,374 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4910639-ac59-4062-a396-551ca6d3411f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 11:08:28,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4910639-ac59-4062-a396-551ca6d3411f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:08:28,568 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:08:28,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:08:28,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1350927880, now seen corresponding path program 1 times [2022-11-16 11:08:28,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:08:28,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178935810] [2022-11-16 11:08:28,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:08:28,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:08:28,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:08:28,774 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:08:28,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:08:28,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178935810] [2022-11-16 11:08:28,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178935810] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:08:28,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651713206] [2022-11-16 11:08:28,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:08:28,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:08:28,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4910639-ac59-4062-a396-551ca6d3411f/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:08:28,777 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4910639-ac59-4062-a396-551ca6d3411f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:08:28,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4910639-ac59-4062-a396-551ca6d3411f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 11:08:28,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:08:28,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 11:08:28,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:08:29,089 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:08:29,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:08:29,343 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:08:29,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651713206] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 11:08:29,343 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:08:29,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 7] total 14 [2022-11-16 11:08:29,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568239328] [2022-11-16 11:08:29,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:08:29,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 11:08:29,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:08:29,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 11:08:29,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2022-11-16 11:08:29,346 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 119 [2022-11-16 11:08:29,348 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 104 transitions, 259 flow. Second operand has 7 states, 7 states have (on average 88.28571428571429) internal successors, (618), 7 states have internal predecessors, (618), 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) [2022-11-16 11:08:29,348 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:08:29,348 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 119 [2022-11-16 11:08:29,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:08:29,512 INFO L130 PetriNetUnfolder]: 59/261 cut-off events. [2022-11-16 11:08:29,513 INFO L131 PetriNetUnfolder]: For 76/90 co-relation queries the response was YES. [2022-11-16 11:08:29,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 498 conditions, 261 events. 59/261 cut-off events. For 76/90 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 796 event pairs, 20 based on Foata normal form. 14/262 useless extension candidates. Maximal degree in co-relation 489. Up to 67 conditions per place. [2022-11-16 11:08:29,516 INFO L137 encePairwiseOnDemand]: 111/119 looper letters, 29 selfloop transitions, 7 changer transitions 0/110 dead transitions. [2022-11-16 11:08:29,516 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 110 transitions, 352 flow [2022-11-16 11:08:29,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:08:29,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-16 11:08:29,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 629 transitions. [2022-11-16 11:08:29,519 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7551020408163265 [2022-11-16 11:08:29,519 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 629 transitions. [2022-11-16 11:08:29,519 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 629 transitions. [2022-11-16 11:08:29,520 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:08:29,520 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 629 transitions. [2022-11-16 11:08:29,522 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 89.85714285714286) internal successors, (629), 7 states have internal predecessors, (629), 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) [2022-11-16 11:08:29,524 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 119.0) internal successors, (952), 8 states have internal predecessors, (952), 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) [2022-11-16 11:08:29,525 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 119.0) internal successors, (952), 8 states have internal predecessors, (952), 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) [2022-11-16 11:08:29,525 INFO L175 Difference]: Start difference. First operand has 113 places, 104 transitions, 259 flow. Second operand 7 states and 629 transitions. [2022-11-16 11:08:29,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 110 transitions, 352 flow [2022-11-16 11:08:29,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 110 transitions, 343 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-16 11:08:29,530 INFO L231 Difference]: Finished difference. Result has 117 places, 105 transitions, 278 flow [2022-11-16 11:08:29,530 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=119, PETRI_DIFFERENCE_MINUEND_FLOW=251, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=278, PETRI_PLACES=117, PETRI_TRANSITIONS=105} [2022-11-16 11:08:29,531 INFO L288 CegarLoopForPetriNet]: 106 programPoint places, 11 predicate places. [2022-11-16 11:08:29,531 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 105 transitions, 278 flow [2022-11-16 11:08:29,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 88.28571428571429) internal successors, (618), 7 states have internal predecessors, (618), 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) [2022-11-16 11:08:29,532 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:08:29,532 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:08:29,545 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4910639-ac59-4062-a396-551ca6d3411f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 11:08:29,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4910639-ac59-4062-a396-551ca6d3411f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-16 11:08:29,739 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:08:29,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:08:29,740 INFO L85 PathProgramCache]: Analyzing trace with hash 6376246, now seen corresponding path program 1 times [2022-11-16 11:08:29,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:08:29,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884704950] [2022-11-16 11:08:29,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:08:29,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:08:29,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:08:31,668 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:08:31,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:08:31,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884704950] [2022-11-16 11:08:31,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884704950] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:08:31,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899451090] [2022-11-16 11:08:31,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:08:31,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:08:31,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4910639-ac59-4062-a396-551ca6d3411f/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:08:31,671 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4910639-ac59-4062-a396-551ca6d3411f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:08:31,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4910639-ac59-4062-a396-551ca6d3411f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 11:08:31,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:08:31,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-16 11:08:31,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:08:32,440 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:08:32,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:08:32,707 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:08:32,708 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 16 [2022-11-16 11:08:32,737 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:08:32,737 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2022-11-16 11:08:32,914 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:08:32,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899451090] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:08:32,914 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:08:32,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 15, 10] total 32 [2022-11-16 11:08:32,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434729694] [2022-11-16 11:08:32,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:08:32,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-16 11:08:32,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:08:32,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-16 11:08:32,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=892, Unknown=0, NotChecked=0, Total=992 [2022-11-16 11:08:32,921 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 119 [2022-11-16 11:08:32,923 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 105 transitions, 278 flow. Second operand has 32 states, 32 states have (on average 51.78125) internal successors, (1657), 32 states have internal predecessors, (1657), 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) [2022-11-16 11:08:32,923 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:08:32,924 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 119 [2022-11-16 11:08:32,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:08:36,109 INFO L130 PetriNetUnfolder]: 978/2106 cut-off events. [2022-11-16 11:08:36,110 INFO L131 PetriNetUnfolder]: For 1290/1290 co-relation queries the response was YES. [2022-11-16 11:08:36,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5042 conditions, 2106 events. 978/2106 cut-off events. For 1290/1290 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 14108 event pairs, 111 based on Foata normal form. 2/2096 useless extension candidates. Maximal degree in co-relation 5031. Up to 450 conditions per place. [2022-11-16 11:08:36,125 INFO L137 encePairwiseOnDemand]: 95/119 looper letters, 231 selfloop transitions, 81 changer transitions 8/362 dead transitions. [2022-11-16 11:08:36,125 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 362 transitions, 1759 flow [2022-11-16 11:08:36,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-11-16 11:08:36,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2022-11-16 11:08:36,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 2528 transitions. [2022-11-16 11:08:36,133 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4618195104128608 [2022-11-16 11:08:36,134 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 2528 transitions. [2022-11-16 11:08:36,134 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 2528 transitions. [2022-11-16 11:08:36,136 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:08:36,136 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 2528 transitions. [2022-11-16 11:08:36,143 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 54.95652173913044) internal successors, (2528), 46 states have internal predecessors, (2528), 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) [2022-11-16 11:08:36,153 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 119.0) internal successors, (5593), 47 states have internal predecessors, (5593), 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) [2022-11-16 11:08:36,156 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 119.0) internal successors, (5593), 47 states have internal predecessors, (5593), 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) [2022-11-16 11:08:36,157 INFO L175 Difference]: Start difference. First operand has 117 places, 105 transitions, 278 flow. Second operand 46 states and 2528 transitions. [2022-11-16 11:08:36,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 362 transitions, 1759 flow [2022-11-16 11:08:36,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 362 transitions, 1723 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-11-16 11:08:36,170 INFO L231 Difference]: Finished difference. Result has 177 places, 186 transitions, 881 flow [2022-11-16 11:08:36,170 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=119, PETRI_DIFFERENCE_MINUEND_FLOW=268, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=881, PETRI_PLACES=177, PETRI_TRANSITIONS=186} [2022-11-16 11:08:36,171 INFO L288 CegarLoopForPetriNet]: 106 programPoint places, 71 predicate places. [2022-11-16 11:08:36,172 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 186 transitions, 881 flow [2022-11-16 11:08:36,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 51.78125) internal successors, (1657), 32 states have internal predecessors, (1657), 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) [2022-11-16 11:08:36,174 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:08:36,174 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:08:36,180 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4910639-ac59-4062-a396-551ca6d3411f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 11:08:36,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4910639-ac59-4062-a396-551ca6d3411f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-16 11:08:36,380 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:08:36,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:08:36,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1477858140, now seen corresponding path program 2 times [2022-11-16 11:08:36,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:08:36,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371656513] [2022-11-16 11:08:36,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:08:36,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:08:36,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:08:37,711 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:08:37,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:08:37,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371656513] [2022-11-16 11:08:37,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371656513] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:08:37,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426233481] [2022-11-16 11:08:37,712 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:08:37,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:08:37,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4910639-ac59-4062-a396-551ca6d3411f/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:08:37,714 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4910639-ac59-4062-a396-551ca6d3411f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:08:37,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4910639-ac59-4062-a396-551ca6d3411f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 11:08:37,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:08:37,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:08:37,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 56 conjunts are in the unsatisfiable core [2022-11-16 11:08:37,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:08:38,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:08:38,560 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 11:08:38,815 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:08:38,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:08:39,194 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_137 (Array Int Int))) (<= |c_thread1Thread1of1ForFork0_~tmp~0#1| (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_137) c_~A~0.base) c_~A~0.offset))) (forall ((v_ArrVal_137 (Array Int Int))) (<= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_137) c_~A~0.base) c_~A~0.offset) |c_thread1Thread1of1ForFork0_~tmp~0#1|))) is different from false [2022-11-16 11:08:39,217 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:08:39,221 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 32 [2022-11-16 11:08:39,227 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2022-11-16 11:08:39,251 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 11:08:39,259 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:08:39,260 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2022-11-16 11:08:40,067 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:08:40,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426233481] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:08:40,067 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:08:40,068 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 17] total 40 [2022-11-16 11:08:40,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075473327] [2022-11-16 11:08:40,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:08:40,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-16 11:08:40,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:08:40,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-16 11:08:40,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1339, Unknown=11, NotChecked=74, Total=1560 [2022-11-16 11:08:40,078 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 119 [2022-11-16 11:08:40,081 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 186 transitions, 881 flow. Second operand has 40 states, 40 states have (on average 54.025) internal successors, (2161), 40 states have internal predecessors, (2161), 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) [2022-11-16 11:08:40,082 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:08:40,082 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 119 [2022-11-16 11:08:40,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:08:43,648 INFO L130 PetriNetUnfolder]: 2104/4408 cut-off events. [2022-11-16 11:08:43,650 INFO L131 PetriNetUnfolder]: For 10018/10023 co-relation queries the response was YES. [2022-11-16 11:08:43,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13816 conditions, 4408 events. 2104/4408 cut-off events. For 10018/10023 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 35012 event pairs, 280 based on Foata normal form. 6/4397 useless extension candidates. Maximal degree in co-relation 13785. Up to 1774 conditions per place. [2022-11-16 11:08:43,701 INFO L137 encePairwiseOnDemand]: 96/119 looper letters, 295 selfloop transitions, 116 changer transitions 8/465 dead transitions. [2022-11-16 11:08:43,701 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 465 transitions, 3286 flow [2022-11-16 11:08:43,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-16 11:08:43,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2022-11-16 11:08:43,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2211 transitions. [2022-11-16 11:08:43,710 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48894294559929236 [2022-11-16 11:08:43,711 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 2211 transitions. [2022-11-16 11:08:43,711 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 2211 transitions. [2022-11-16 11:08:43,713 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:08:43,713 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 2211 transitions. [2022-11-16 11:08:43,721 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 58.18421052631579) internal successors, (2211), 38 states have internal predecessors, (2211), 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) [2022-11-16 11:08:43,731 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 119.0) internal successors, (4641), 39 states have internal predecessors, (4641), 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) [2022-11-16 11:08:43,733 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 119.0) internal successors, (4641), 39 states have internal predecessors, (4641), 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) [2022-11-16 11:08:43,734 INFO L175 Difference]: Start difference. First operand has 177 places, 186 transitions, 881 flow. Second operand 38 states and 2211 transitions. [2022-11-16 11:08:43,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 465 transitions, 3286 flow [2022-11-16 11:08:43,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 465 transitions, 3074 flow, removed 91 selfloop flow, removed 14 redundant places. [2022-11-16 11:08:43,798 INFO L231 Difference]: Finished difference. Result has 218 places, 283 transitions, 1989 flow [2022-11-16 11:08:43,799 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=119, PETRI_DIFFERENCE_MINUEND_FLOW=791, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=1989, PETRI_PLACES=218, PETRI_TRANSITIONS=283} [2022-11-16 11:08:43,803 INFO L288 CegarLoopForPetriNet]: 106 programPoint places, 112 predicate places. [2022-11-16 11:08:43,803 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 283 transitions, 1989 flow [2022-11-16 11:08:43,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 54.025) internal successors, (2161), 40 states have internal predecessors, (2161), 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) [2022-11-16 11:08:43,805 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:08:43,805 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:08:43,817 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4910639-ac59-4062-a396-551ca6d3411f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 11:08:44,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4910639-ac59-4062-a396-551ca6d3411f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:08:44,012 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:08:44,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:08:44,012 INFO L85 PathProgramCache]: Analyzing trace with hash 639403628, now seen corresponding path program 3 times [2022-11-16 11:08:44,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:08:44,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363439058] [2022-11-16 11:08:44,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:08:44,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:08:44,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 11:08:44,092 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-16 11:08:44,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 11:08:44,161 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-16 11:08:44,161 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-16 11:08:44,163 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2022-11-16 11:08:44,165 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2022-11-16 11:08:44,165 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2022-11-16 11:08:44,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-16 11:08:44,166 INFO L444 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1, 1, 1] [2022-11-16 11:08:44,181 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-11-16 11:08:44,189 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-16 11:08:44,404 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.11 11:08:44 BasicIcfg [2022-11-16 11:08:44,406 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-16 11:08:44,407 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-16 11:08:44,407 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-16 11:08:44,408 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-16 11:08:44,408 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:08:24" (3/4) ... [2022-11-16 11:08:44,412 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-11-16 11:08:44,555 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4910639-ac59-4062-a396-551ca6d3411f/bin/uautomizer-tPACEb0tL8/witness.graphml [2022-11-16 11:08:44,555 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-16 11:08:44,556 INFO L158 Benchmark]: Toolchain (without parser) took 21608.59ms. Allocated memory was 90.2MB in the beginning and 297.8MB in the end (delta: 207.6MB). Free memory was 68.0MB in the beginning and 202.8MB in the end (delta: -134.7MB). Peak memory consumption was 73.2MB. Max. memory is 16.1GB. [2022-11-16 11:08:44,557 INFO L158 Benchmark]: CDTParser took 0.33ms. Allocated memory is still 90.2MB. Free memory was 62.1MB in the beginning and 62.0MB in the end (delta: 77.0kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-16 11:08:44,557 INFO L158 Benchmark]: CACSL2BoogieTranslator took 318.67ms. Allocated memory is still 90.2MB. Free memory was 67.7MB in the beginning and 65.9MB in the end (delta: 1.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-16 11:08:44,558 INFO L158 Benchmark]: Boogie Procedure Inliner took 59.27ms. Allocated memory is still 90.2MB. Free memory was 65.9MB in the beginning and 64.0MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-16 11:08:44,558 INFO L158 Benchmark]: Boogie Preprocessor took 32.40ms. Allocated memory is still 90.2MB. Free memory was 64.0MB in the beginning and 62.5MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-16 11:08:44,559 INFO L158 Benchmark]: RCFGBuilder took 907.04ms. Allocated memory was 90.2MB in the beginning and 115.3MB in the end (delta: 25.2MB). Free memory was 62.3MB in the beginning and 84.3MB in the end (delta: -22.0MB). Peak memory consumption was 19.2MB. Max. memory is 16.1GB. [2022-11-16 11:08:44,559 INFO L158 Benchmark]: TraceAbstraction took 20136.20ms. Allocated memory was 115.3MB in the beginning and 297.8MB in the end (delta: 182.5MB). Free memory was 83.4MB in the beginning and 220.6MB in the end (delta: -137.2MB). Peak memory consumption was 175.0MB. Max. memory is 16.1GB. [2022-11-16 11:08:44,560 INFO L158 Benchmark]: Witness Printer took 147.82ms. Allocated memory is still 297.8MB. Free memory was 220.6MB in the beginning and 202.8MB in the end (delta: 17.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2022-11-16 11:08:44,563 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33ms. Allocated memory is still 90.2MB. Free memory was 62.1MB in the beginning and 62.0MB in the end (delta: 77.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 318.67ms. Allocated memory is still 90.2MB. Free memory was 67.7MB in the beginning and 65.9MB in the end (delta: 1.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 59.27ms. Allocated memory is still 90.2MB. Free memory was 65.9MB in the beginning and 64.0MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 32.40ms. Allocated memory is still 90.2MB. Free memory was 64.0MB in the beginning and 62.5MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 907.04ms. Allocated memory was 90.2MB in the beginning and 115.3MB in the end (delta: 25.2MB). Free memory was 62.3MB in the beginning and 84.3MB in the end (delta: -22.0MB). Peak memory consumption was 19.2MB. Max. memory is 16.1GB. * TraceAbstraction took 20136.20ms. Allocated memory was 115.3MB in the beginning and 297.8MB in the end (delta: 182.5MB). Free memory was 83.4MB in the beginning and 220.6MB in the end (delta: -137.2MB). Peak memory consumption was 175.0MB. Max. memory is 16.1GB. * Witness Printer took 147.82ms. Allocated memory is still 297.8MB. Free memory was 220.6MB in the beginning and 202.8MB in the end (delta: 17.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 87]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L41] 0 int* A; VAL [A={0:0}] [L42] 0 int counter, N; VAL [A={0:0}, counter=0, N=0] [L75] 0 pthread_t t1, t2; VAL [A={0:0}, counter=0, N=0, t1={5:0}, t2={3:0}] [L77] 0 N = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=1, A={0:0}, counter=0, N=1, t1={5:0}, t2={3:0}] [L78] CALL, EXPR 0 create_fresh_int_array(N) [L93] CALL 0 assume_abort_if_not(size >= 0) [L38] COND FALSE 0 !(!cond) VAL [\old(cond)=1, A={0:0}, cond=1, counter=0, N=1] [L93] RET 0 assume_abort_if_not(size >= 0) [L94] CALL 0 assume_abort_if_not(size <= (((size_t) 4294967295) / sizeof(int))) [L38] COND FALSE 0 !(!cond) VAL [\old(cond)=1, A={0:0}, cond=1, counter=0, N=1] [L94] RET 0 assume_abort_if_not(size <= (((size_t) 4294967295) / sizeof(int))) [L96] 0 int* arr = (int*)malloc(sizeof(int) * (size_t)size); VAL [\old(size)=1, A={0:0}, arr={-3:0}, counter=0, malloc(sizeof(int) * (size_t)size)={-3:0}, N=1, size=1] [L97] 0 int i = 0; VAL [\old(size)=1, A={0:0}, arr={-3:0}, counter=0, i=0, N=1, size=1] [L97] COND TRUE 0 i < size VAL [\old(size)=1, A={0:0}, arr={-3:0}, counter=0, i=0, N=1, size=1] [L98] 0 arr[i] = __VERIFIER_nondet_int() VAL [\old(size)=1, __VERIFIER_nondet_int()=6, A={0:0}, arr={-3:0}, counter=0, i=0, N=1, size=1] [L97] 0 i++ VAL [\old(size)=1, A={0:0}, arr={-3:0}, counter=0, i=1, N=1, size=1] [L97] COND FALSE 0 !(i < size) VAL [\old(size)=1, A={0:0}, arr={-3:0}, counter=0, i=1, N=1, size=1] [L100] 0 return arr; VAL [\old(size)=1, \result={-3:0}, A={0:0}, arr={-3:0}, counter=0, i=1, N=1, size=1] [L78] RET, EXPR 0 create_fresh_int_array(N) [L78] 0 A = create_fresh_int_array(N) VAL [A={-3:0}, counter=0, create_fresh_int_array(N)={-3:0}, N=1, t1={5:0}, t2={3:0}] [L81] FCALL, FORK 0 pthread_create(&t1, 0, thread1, 0) VAL [A={-3:0}, counter=0, N=1, pthread_create(&t1, 0, thread1, 0)=-2, t1={5:0}, t2={3:0}] [L49] 1 int i=0; VAL [A={-3:0}, counter=0, i=0, N=1] [L49] COND TRUE 1 i= 0 || a >= -2147483648 - b) [L38] COND FALSE 1 !(!cond) [L110] RET 1 assume_abort_if_not(b >= 0 || a >= -2147483648 - b) [L111] CALL 1 assume_abort_if_not(b <= 0 || a <= 2147483647 - b) [L38] COND FALSE 1 !(!cond) [L111] RET 1 assume_abort_if_not(b <= 0 || a <= 2147483647 - b) [L112] 1 return a + b; [L51] RET, EXPR 1 plus(counter, A[i]) [L51] 1 int tmp = plus(counter, A[i]); [L62] 2 int i=0; VAL [A={-3:0}, counter=0, i=0, N=1] [L62] COND TRUE 2 i= b - 2147483648) [L38] COND FALSE 2 !(!cond) [L104] RET 2 assume_abort_if_not(b <= 0 || a >= b - 2147483648) [L105] CALL 2 assume_abort_if_not(b >= 0 || a <= b + 2147483647) [L38] COND FALSE 2 !(!cond) [L105] RET 2 assume_abort_if_not(b >= 0 || a <= b + 2147483647) [L106] 2 return a - b; [L64] RET, EXPR 2 minus(counter, A[i]) [L64] 2 int tmp = minus(counter, A[i]); [L67] 2 counter = tmp VAL [A={-3:0}, counter=-6, i=0, N=1, tmp=-6] [L62] 2 i++ VAL [A={-3:0}, counter=-6, i=1, N=1, tmp=-6] [L62] COND FALSE 2 !(i