./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a78787a-32db-4a5f-a5cb-18016b554397/bin/uautomizer-QkZJyEgLgS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a78787a-32db-4a5f-a5cb-18016b554397/bin/uautomizer-QkZJyEgLgS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a78787a-32db-4a5f-a5cb-18016b554397/bin/uautomizer-QkZJyEgLgS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a78787a-32db-4a5f-a5cb-18016b554397/bin/uautomizer-QkZJyEgLgS/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a78787a-32db-4a5f-a5cb-18016b554397/bin/uautomizer-QkZJyEgLgS/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a78787a-32db-4a5f-a5cb-18016b554397/bin/uautomizer-QkZJyEgLgS --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 9ceec73f9e554c485344f34d2b1865bfa0707ac614302bf3f054f6fb35398f61 --- 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-4e7fbc6 [2022-11-23 03:46:17,364 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 03:46:17,367 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 03:46:17,396 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 03:46:17,396 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 03:46:17,400 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 03:46:17,406 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 03:46:17,410 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 03:46:17,412 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 03:46:17,420 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 03:46:17,422 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 03:46:17,425 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 03:46:17,426 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 03:46:17,430 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 03:46:17,435 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 03:46:17,438 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 03:46:17,440 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 03:46:17,441 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 03:46:17,443 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 03:46:17,451 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 03:46:17,453 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 03:46:17,456 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 03:46:17,458 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 03:46:17,459 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 03:46:17,470 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 03:46:17,470 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 03:46:17,471 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 03:46:17,473 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 03:46:17,473 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 03:46:17,474 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 03:46:17,475 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 03:46:17,476 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 03:46:17,478 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 03:46:17,480 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 03:46:17,482 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 03:46:17,482 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 03:46:17,483 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 03:46:17,483 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 03:46:17,484 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 03:46:17,485 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 03:46:17,486 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 03:46:17,487 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a78787a-32db-4a5f-a5cb-18016b554397/bin/uautomizer-QkZJyEgLgS/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-23 03:46:17,533 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 03:46:17,533 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 03:46:17,534 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 03:46:17,534 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 03:46:17,535 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 03:46:17,536 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 03:46:17,536 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-23 03:46:17,537 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-23 03:46:17,537 INFO L138 SettingsManager]: * Use SBE=true [2022-11-23 03:46:17,537 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 03:46:17,538 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 03:46:17,539 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 03:46:17,539 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 03:46:17,540 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 03:46:17,540 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 03:46:17,540 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 03:46:17,540 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 03:46:17,541 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 03:46:17,541 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 03:46:17,541 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 03:46:17,542 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 03:46:17,542 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 03:46:17,542 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-23 03:46:17,543 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 03:46:17,543 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 03:46:17,543 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 03:46:17,544 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 03:46:17,544 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 03:46:17,545 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-23 03:46:17,545 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 03:46:17,545 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-23 03:46:17,546 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 03:46:17,546 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-23 03:46:17,547 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-23 03:46:17,547 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a78787a-32db-4a5f-a5cb-18016b554397/bin/uautomizer-QkZJyEgLgS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a78787a-32db-4a5f-a5cb-18016b554397/bin/uautomizer-QkZJyEgLgS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9ceec73f9e554c485344f34d2b1865bfa0707ac614302bf3f054f6fb35398f61 [2022-11-23 03:46:17,919 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 03:46:17,961 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 03:46:17,963 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 03:46:17,965 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 03:46:17,965 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 03:46:17,967 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a78787a-32db-4a5f-a5cb-18016b554397/bin/uautomizer-QkZJyEgLgS/../../sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt.wvr.c [2022-11-23 03:46:20,988 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 03:46:21,271 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 03:46:21,272 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a78787a-32db-4a5f-a5cb-18016b554397/sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt.wvr.c [2022-11-23 03:46:21,281 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a78787a-32db-4a5f-a5cb-18016b554397/bin/uautomizer-QkZJyEgLgS/data/08b99df51/89b2a17083a446f190ac9c76e098036f/FLAG24d2fa8e8 [2022-11-23 03:46:21,298 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a78787a-32db-4a5f-a5cb-18016b554397/bin/uautomizer-QkZJyEgLgS/data/08b99df51/89b2a17083a446f190ac9c76e098036f [2022-11-23 03:46:21,301 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 03:46:21,303 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 03:46:21,305 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 03:46:21,305 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 03:46:21,310 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 03:46:21,311 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:46:21" (1/1) ... [2022-11-23 03:46:21,312 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13962cf1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:46:21, skipping insertion in model container [2022-11-23 03:46:21,313 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:46:21" (1/1) ... [2022-11-23 03:46:21,322 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 03:46:21,345 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 03:46:21,639 WARN L237 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_5a78787a-32db-4a5f-a5cb-18016b554397/sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt.wvr.c[4293,4306] [2022-11-23 03:46:21,670 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 03:46:21,682 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 03:46:21,738 WARN L237 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_5a78787a-32db-4a5f-a5cb-18016b554397/sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt.wvr.c[4293,4306] [2022-11-23 03:46:21,755 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 03:46:21,788 INFO L208 MainTranslator]: Completed translation [2022-11-23 03:46:21,788 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:46:21 WrapperNode [2022-11-23 03:46:21,789 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 03:46:21,791 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 03:46:21,791 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 03:46:21,791 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 03:46:21,800 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:46:21" (1/1) ... [2022-11-23 03:46:21,829 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:46:21" (1/1) ... [2022-11-23 03:46:21,878 INFO L138 Inliner]: procedures = 26, calls = 79, calls flagged for inlining = 17, calls inlined = 21, statements flattened = 319 [2022-11-23 03:46:21,879 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 03:46:21,879 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 03:46:21,880 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 03:46:21,880 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 03:46:21,890 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:46:21" (1/1) ... [2022-11-23 03:46:21,890 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:46:21" (1/1) ... [2022-11-23 03:46:21,897 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:46:21" (1/1) ... [2022-11-23 03:46:21,909 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:46:21" (1/1) ... [2022-11-23 03:46:21,919 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:46:21" (1/1) ... [2022-11-23 03:46:21,930 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:46:21" (1/1) ... [2022-11-23 03:46:21,945 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:46:21" (1/1) ... [2022-11-23 03:46:21,947 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:46:21" (1/1) ... [2022-11-23 03:46:21,950 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 03:46:21,951 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 03:46:21,951 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 03:46:21,952 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 03:46:21,953 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:46:21" (1/1) ... [2022-11-23 03:46:21,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 03:46:21,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a78787a-32db-4a5f-a5cb-18016b554397/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:46:21,988 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a78787a-32db-4a5f-a5cb-18016b554397/bin/uautomizer-QkZJyEgLgS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 03:46:22,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a78787a-32db-4a5f-a5cb-18016b554397/bin/uautomizer-QkZJyEgLgS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 03:46:22,035 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 03:46:22,036 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 03:46:22,036 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 03:46:22,036 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-23 03:46:22,036 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-23 03:46:22,036 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-23 03:46:22,037 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-23 03:46:22,037 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-23 03:46:22,037 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-23 03:46:22,037 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-23 03:46:22,038 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-11-23 03:46:22,038 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-11-23 03:46:22,038 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 03:46:22,038 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-23 03:46:22,038 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-23 03:46:22,039 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-23 03:46:22,039 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 03:46:22,039 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 03:46:22,039 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 03:46:22,041 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-23 03:46:22,262 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 03:46:22,264 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 03:46:22,924 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 03:46:23,169 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 03:46:23,170 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-11-23 03:46:23,172 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:46:23 BoogieIcfgContainer [2022-11-23 03:46:23,173 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 03:46:23,175 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 03:46:23,175 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 03:46:23,179 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 03:46:23,180 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:46:21" (1/3) ... [2022-11-23 03:46:23,181 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a7f9733 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:46:23, skipping insertion in model container [2022-11-23 03:46:23,181 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:46:21" (2/3) ... [2022-11-23 03:46:23,181 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a7f9733 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:46:23, skipping insertion in model container [2022-11-23 03:46:23,181 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:46:23" (3/3) ... [2022-11-23 03:46:23,183 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-buffer-mult-alt.wvr.c [2022-11-23 03:46:23,192 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-23 03:46:23,205 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 03:46:23,205 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 03:46:23,205 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-23 03:46:23,330 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-11-23 03:46:23,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 241 places, 247 transitions, 526 flow [2022-11-23 03:46:23,481 INFO L130 PetriNetUnfolder]: 19/243 cut-off events. [2022-11-23 03:46:23,482 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-23 03:46:23,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 260 conditions, 243 events. 19/243 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 115 event pairs, 0 based on Foata normal form. 0/223 useless extension candidates. Maximal degree in co-relation 204. Up to 2 conditions per place. [2022-11-23 03:46:23,490 INFO L82 GeneralOperation]: Start removeDead. Operand has 241 places, 247 transitions, 526 flow [2022-11-23 03:46:23,496 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 224 places, 230 transitions, 484 flow [2022-11-23 03:46:23,500 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-23 03:46:23,516 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 224 places, 230 transitions, 484 flow [2022-11-23 03:46:23,519 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 224 places, 230 transitions, 484 flow [2022-11-23 03:46:23,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 224 places, 230 transitions, 484 flow [2022-11-23 03:46:23,581 INFO L130 PetriNetUnfolder]: 19/230 cut-off events. [2022-11-23 03:46:23,582 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-23 03:46:23,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 247 conditions, 230 events. 19/230 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 114 event pairs, 0 based on Foata normal form. 0/211 useless extension candidates. Maximal degree in co-relation 204. Up to 2 conditions per place. [2022-11-23 03:46:23,586 INFO L119 LiptonReduction]: Number of co-enabled transitions 2000 [2022-11-23 03:46:35,729 INFO L134 LiptonReduction]: Checked pairs total: 4047 [2022-11-23 03:46:35,729 INFO L136 LiptonReduction]: Total number of compositions: 231 [2022-11-23 03:46:35,747 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 03:46:35,753 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;@2797966b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 03:46:35,754 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-11-23 03:46:35,764 INFO L130 PetriNetUnfolder]: 6/36 cut-off events. [2022-11-23 03:46:35,765 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-23 03:46:35,765 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:46:35,766 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] [2022-11-23 03:46:35,766 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-23 03:46:35,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:46:35,772 INFO L85 PathProgramCache]: Analyzing trace with hash -1236017459, now seen corresponding path program 1 times [2022-11-23 03:46:35,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:46:35,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295420346] [2022-11-23 03:46:35,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:46:35,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:46:36,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:46:36,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:46:36,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:46:36,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295420346] [2022-11-23 03:46:36,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295420346] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:46:36,928 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:46:36,929 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 03:46:36,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688150932] [2022-11-23 03:46:36,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:46:36,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 03:46:36,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:46:36,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 03:46:36,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-23 03:46:37,052 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 478 [2022-11-23 03:46:37,061 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 98 flow. Second operand has 5 states, 5 states have (on average 213.8) internal successors, (1069), 5 states have internal predecessors, (1069), 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) [2022-11-23 03:46:37,061 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:46:37,061 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 478 [2022-11-23 03:46:37,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:46:38,216 INFO L130 PetriNetUnfolder]: 3922/5142 cut-off events. [2022-11-23 03:46:38,217 INFO L131 PetriNetUnfolder]: For 377/377 co-relation queries the response was YES. [2022-11-23 03:46:38,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10672 conditions, 5142 events. 3922/5142 cut-off events. For 377/377 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 23621 event pairs, 504 based on Foata normal form. 0/3692 useless extension candidates. Maximal degree in co-relation 8744. Up to 2938 conditions per place. [2022-11-23 03:46:38,266 INFO L137 encePairwiseOnDemand]: 471/478 looper letters, 79 selfloop transitions, 7 changer transitions 0/90 dead transitions. [2022-11-23 03:46:38,266 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 90 transitions, 409 flow [2022-11-23 03:46:38,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 03:46:38,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-23 03:46:38,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1342 transitions. [2022-11-23 03:46:38,287 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4679218967921897 [2022-11-23 03:46:38,288 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1342 transitions. [2022-11-23 03:46:38,288 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1342 transitions. [2022-11-23 03:46:38,292 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:46:38,294 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1342 transitions. [2022-11-23 03:46:38,301 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 223.66666666666666) internal successors, (1342), 6 states have internal predecessors, (1342), 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) [2022-11-23 03:46:38,315 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 478.0) internal successors, (3346), 7 states have internal predecessors, (3346), 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) [2022-11-23 03:46:38,318 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 478.0) internal successors, (3346), 7 states have internal predecessors, (3346), 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) [2022-11-23 03:46:38,320 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 98 flow. Second operand 6 states and 1342 transitions. [2022-11-23 03:46:38,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 90 transitions, 409 flow [2022-11-23 03:46:38,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 90 transitions, 371 flow, removed 0 selfloop flow, removed 8 redundant places. [2022-11-23 03:46:38,334 INFO L231 Difference]: Finished difference. Result has 44 places, 42 transitions, 129 flow [2022-11-23 03:46:38,337 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=478, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=129, PETRI_PLACES=44, PETRI_TRANSITIONS=42} [2022-11-23 03:46:38,340 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, 0 predicate places. [2022-11-23 03:46:38,341 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 42 transitions, 129 flow [2022-11-23 03:46:38,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 213.8) internal successors, (1069), 5 states have internal predecessors, (1069), 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) [2022-11-23 03:46:38,342 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:46:38,342 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] [2022-11-23 03:46:38,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 03:46:38,343 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-23 03:46:38,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:46:38,344 INFO L85 PathProgramCache]: Analyzing trace with hash -572858844, now seen corresponding path program 1 times [2022-11-23 03:46:38,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:46:38,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75056174] [2022-11-23 03:46:38,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:46:38,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:46:38,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:46:38,506 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:46:38,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:46:38,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75056174] [2022-11-23 03:46:38,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75056174] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:46:38,508 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:46:38,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 03:46:38,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039820120] [2022-11-23 03:46:38,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:46:38,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 03:46:38,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:46:38,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 03:46:38,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 03:46:38,583 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 478 [2022-11-23 03:46:38,585 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 42 transitions, 129 flow. Second operand has 4 states, 4 states have (on average 215.25) internal successors, (861), 4 states have internal predecessors, (861), 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) [2022-11-23 03:46:38,585 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:46:38,585 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 478 [2022-11-23 03:46:38,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:46:39,574 INFO L130 PetriNetUnfolder]: 3759/5180 cut-off events. [2022-11-23 03:46:39,574 INFO L131 PetriNetUnfolder]: For 3201/3816 co-relation queries the response was YES. [2022-11-23 03:46:39,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12142 conditions, 5180 events. 3759/5180 cut-off events. For 3201/3816 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 25960 event pairs, 2315 based on Foata normal form. 803/4671 useless extension candidates. Maximal degree in co-relation 6255. Up to 4274 conditions per place. [2022-11-23 03:46:39,613 INFO L137 encePairwiseOnDemand]: 472/478 looper letters, 33 selfloop transitions, 2 changer transitions 41/84 dead transitions. [2022-11-23 03:46:39,614 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 84 transitions, 383 flow [2022-11-23 03:46:39,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 03:46:39,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-23 03:46:39,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1122 transitions. [2022-11-23 03:46:39,618 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4694560669456067 [2022-11-23 03:46:39,618 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1122 transitions. [2022-11-23 03:46:39,618 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1122 transitions. [2022-11-23 03:46:39,619 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:46:39,619 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1122 transitions. [2022-11-23 03:46:39,622 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 224.4) internal successors, (1122), 5 states have internal predecessors, (1122), 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) [2022-11-23 03:46:39,627 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 478.0) internal successors, (2868), 6 states have internal predecessors, (2868), 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) [2022-11-23 03:46:39,629 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 478.0) internal successors, (2868), 6 states have internal predecessors, (2868), 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) [2022-11-23 03:46:39,629 INFO L175 Difference]: Start difference. First operand has 44 places, 42 transitions, 129 flow. Second operand 5 states and 1122 transitions. [2022-11-23 03:46:39,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 84 transitions, 383 flow [2022-11-23 03:46:39,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 84 transitions, 376 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-23 03:46:39,641 INFO L231 Difference]: Finished difference. Result has 49 places, 43 transitions, 146 flow [2022-11-23 03:46:39,642 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=478, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=146, PETRI_PLACES=49, PETRI_TRANSITIONS=43} [2022-11-23 03:46:39,643 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, 5 predicate places. [2022-11-23 03:46:39,643 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 43 transitions, 146 flow [2022-11-23 03:46:39,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 215.25) internal successors, (861), 4 states have internal predecessors, (861), 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) [2022-11-23 03:46:39,644 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:46:39,644 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] [2022-11-23 03:46:39,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 03:46:39,645 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-23 03:46:39,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:46:39,646 INFO L85 PathProgramCache]: Analyzing trace with hash -540073642, now seen corresponding path program 1 times [2022-11-23 03:46:39,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:46:39,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861478150] [2022-11-23 03:46:39,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:46:39,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:46:39,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:46:40,113 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 03:46:40,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:46:40,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861478150] [2022-11-23 03:46:40,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861478150] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:46:40,114 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:46:40,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 03:46:40,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459995062] [2022-11-23 03:46:40,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:46:40,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 03:46:40,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:46:40,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 03:46:40,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-23 03:46:40,166 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 478 [2022-11-23 03:46:40,168 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 43 transitions, 146 flow. Second operand has 5 states, 5 states have (on average 217.4) internal successors, (1087), 5 states have internal predecessors, (1087), 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) [2022-11-23 03:46:40,168 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:46:40,168 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 478 [2022-11-23 03:46:40,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:46:41,968 INFO L130 PetriNetUnfolder]: 8097/10638 cut-off events. [2022-11-23 03:46:41,969 INFO L131 PetriNetUnfolder]: For 5643/5643 co-relation queries the response was YES. [2022-11-23 03:46:42,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27464 conditions, 10638 events. 8097/10638 cut-off events. For 5643/5643 co-relation queries the response was YES. Maximal size of possible extension queue 590. Compared 53492 event pairs, 1733 based on Foata normal form. 126/8877 useless extension candidates. Maximal degree in co-relation 27448. Up to 3861 conditions per place. [2022-11-23 03:46:42,061 INFO L137 encePairwiseOnDemand]: 472/478 looper letters, 92 selfloop transitions, 13 changer transitions 0/109 dead transitions. [2022-11-23 03:46:42,062 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 109 transitions, 569 flow [2022-11-23 03:46:42,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 03:46:42,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-23 03:46:42,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1366 transitions. [2022-11-23 03:46:42,066 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47629009762900976 [2022-11-23 03:46:42,067 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1366 transitions. [2022-11-23 03:46:42,067 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1366 transitions. [2022-11-23 03:46:42,068 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:46:42,068 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1366 transitions. [2022-11-23 03:46:42,071 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 227.66666666666666) internal successors, (1366), 6 states have internal predecessors, (1366), 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) [2022-11-23 03:46:42,077 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 478.0) internal successors, (3346), 7 states have internal predecessors, (3346), 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) [2022-11-23 03:46:42,079 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 478.0) internal successors, (3346), 7 states have internal predecessors, (3346), 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) [2022-11-23 03:46:42,079 INFO L175 Difference]: Start difference. First operand has 49 places, 43 transitions, 146 flow. Second operand 6 states and 1366 transitions. [2022-11-23 03:46:42,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 109 transitions, 569 flow [2022-11-23 03:46:42,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 109 transitions, 549 flow, removed 9 selfloop flow, removed 2 redundant places. [2022-11-23 03:46:42,101 INFO L231 Difference]: Finished difference. Result has 54 places, 54 transitions, 261 flow [2022-11-23 03:46:42,102 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=478, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=261, PETRI_PLACES=54, PETRI_TRANSITIONS=54} [2022-11-23 03:46:42,102 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, 10 predicate places. [2022-11-23 03:46:42,103 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 54 transitions, 261 flow [2022-11-23 03:46:42,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 217.4) internal successors, (1087), 5 states have internal predecessors, (1087), 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) [2022-11-23 03:46:42,104 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:46:42,104 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] [2022-11-23 03:46:42,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-23 03:46:42,104 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-23 03:46:42,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:46:42,105 INFO L85 PathProgramCache]: Analyzing trace with hash 1233349351, now seen corresponding path program 1 times [2022-11-23 03:46:42,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:46:42,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833761852] [2022-11-23 03:46:42,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:46:42,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:46:42,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:46:42,492 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 03:46:42,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:46:42,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833761852] [2022-11-23 03:46:42,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833761852] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:46:42,494 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:46:42,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 03:46:42,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728553033] [2022-11-23 03:46:42,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:46:42,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 03:46:42,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:46:42,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 03:46:42,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 03:46:42,508 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 478 [2022-11-23 03:46:42,509 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 54 transitions, 261 flow. Second operand has 3 states, 3 states have (on average 223.33333333333334) internal successors, (670), 3 states have internal predecessors, (670), 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) [2022-11-23 03:46:42,509 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:46:42,512 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 478 [2022-11-23 03:46:42,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:46:43,908 INFO L130 PetriNetUnfolder]: 6055/8232 cut-off events. [2022-11-23 03:46:43,908 INFO L131 PetriNetUnfolder]: For 10734/11510 co-relation queries the response was YES. [2022-11-23 03:46:43,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24208 conditions, 8232 events. 6055/8232 cut-off events. For 10734/11510 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 43262 event pairs, 461 based on Foata normal form. 330/6836 useless extension candidates. Maximal degree in co-relation 24185. Up to 7515 conditions per place. [2022-11-23 03:46:44,008 INFO L137 encePairwiseOnDemand]: 475/478 looper letters, 52 selfloop transitions, 2 changer transitions 4/71 dead transitions. [2022-11-23 03:46:44,008 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 71 transitions, 414 flow [2022-11-23 03:46:44,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 03:46:44,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 03:46:44,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 695 transitions. [2022-11-23 03:46:44,017 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48465829846582986 [2022-11-23 03:46:44,018 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 695 transitions. [2022-11-23 03:46:44,018 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 695 transitions. [2022-11-23 03:46:44,018 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:46:44,019 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 695 transitions. [2022-11-23 03:46:44,021 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 231.66666666666666) internal successors, (695), 3 states have internal predecessors, (695), 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) [2022-11-23 03:46:44,024 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 478.0) internal successors, (1912), 4 states have internal predecessors, (1912), 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) [2022-11-23 03:46:44,025 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 478.0) internal successors, (1912), 4 states have internal predecessors, (1912), 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) [2022-11-23 03:46:44,026 INFO L175 Difference]: Start difference. First operand has 54 places, 54 transitions, 261 flow. Second operand 3 states and 695 transitions. [2022-11-23 03:46:44,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 71 transitions, 414 flow [2022-11-23 03:46:44,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 71 transitions, 405 flow, removed 4 selfloop flow, removed 1 redundant places. [2022-11-23 03:46:44,046 INFO L231 Difference]: Finished difference. Result has 56 places, 54 transitions, 258 flow [2022-11-23 03:46:44,046 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=478, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=258, PETRI_PLACES=56, PETRI_TRANSITIONS=54} [2022-11-23 03:46:44,048 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, 12 predicate places. [2022-11-23 03:46:44,048 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 54 transitions, 258 flow [2022-11-23 03:46:44,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 223.33333333333334) internal successors, (670), 3 states have internal predecessors, (670), 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) [2022-11-23 03:46:44,050 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:46:44,050 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] [2022-11-23 03:46:44,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-23 03:46:44,051 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-23 03:46:44,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:46:44,051 INFO L85 PathProgramCache]: Analyzing trace with hash 1541204684, now seen corresponding path program 1 times [2022-11-23 03:46:44,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:46:44,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920092202] [2022-11-23 03:46:44,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:46:44,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:46:44,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:46:45,551 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:46:45,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:46:45,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920092202] [2022-11-23 03:46:45,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920092202] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:46:45,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682149722] [2022-11-23 03:46:45,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:46:45,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:46:45,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a78787a-32db-4a5f-a5cb-18016b554397/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:46:45,558 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a78787a-32db-4a5f-a5cb-18016b554397/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:46:45,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a78787a-32db-4a5f-a5cb-18016b554397/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 03:46:45,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:46:45,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-23 03:46:45,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:46:45,950 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 03:46:46,118 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 03:46:46,217 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 03:46:46,353 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 03:46:46,457 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 03:46:46,793 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 19 treesize of output 7 [2022-11-23 03:46:46,931 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:46:46,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:46:48,111 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 03:46:48,112 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 61 [2022-11-23 03:46:48,124 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 1267 treesize of output 1235 [2022-11-23 03:46:48,153 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 1235 treesize of output 1139 [2022-11-23 03:46:48,181 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 1139 treesize of output 947 [2022-11-23 03:46:48,216 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 485 treesize of output 461 [2022-11-23 03:46:48,243 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 923 treesize of output 875 [2022-11-23 03:46:52,705 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:46:52,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682149722] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:46:52,705 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:46:52,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 12, 12] total 28 [2022-11-23 03:46:52,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141103161] [2022-11-23 03:46:52,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:46:52,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-23 03:46:52,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:46:52,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-23 03:46:52,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=709, Unknown=9, NotChecked=0, Total=870 [2022-11-23 03:46:55,139 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 03:46:59,119 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 03:47:01,915 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 03:47:02,690 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 478 [2022-11-23 03:47:02,696 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 54 transitions, 258 flow. Second operand has 30 states, 30 states have (on average 148.4) internal successors, (4452), 30 states have internal predecessors, (4452), 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) [2022-11-23 03:47:02,697 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:47:02,697 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 478 [2022-11-23 03:47:02,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:47:05,817 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 03:47:12,575 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 03:47:15,475 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 03:47:27,347 INFO L130 PetriNetUnfolder]: 35231/46538 cut-off events. [2022-11-23 03:47:27,348 INFO L131 PetriNetUnfolder]: For 49260/49260 co-relation queries the response was YES. [2022-11-23 03:47:27,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130795 conditions, 46538 events. 35231/46538 cut-off events. For 49260/49260 co-relation queries the response was YES. Maximal size of possible extension queue 1670. Compared 265058 event pairs, 2552 based on Foata normal form. 335/37204 useless extension candidates. Maximal degree in co-relation 109695. Up to 12173 conditions per place. [2022-11-23 03:47:27,815 INFO L137 encePairwiseOnDemand]: 462/478 looper letters, 458 selfloop transitions, 139 changer transitions 36/636 dead transitions. [2022-11-23 03:47:27,816 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 636 transitions, 3720 flow [2022-11-23 03:47:27,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-23 03:47:27,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2022-11-23 03:47:27,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 6548 transitions. [2022-11-23 03:47:27,840 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.33411572609449947 [2022-11-23 03:47:27,840 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 6548 transitions. [2022-11-23 03:47:27,841 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 6548 transitions. [2022-11-23 03:47:27,845 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:47:27,846 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 6548 transitions. [2022-11-23 03:47:27,864 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 159.70731707317074) internal successors, (6548), 41 states have internal predecessors, (6548), 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) [2022-11-23 03:47:27,899 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 478.0) internal successors, (20076), 42 states have internal predecessors, (20076), 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) [2022-11-23 03:47:27,907 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 478.0) internal successors, (20076), 42 states have internal predecessors, (20076), 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) [2022-11-23 03:47:27,907 INFO L175 Difference]: Start difference. First operand has 56 places, 54 transitions, 258 flow. Second operand 41 states and 6548 transitions. [2022-11-23 03:47:27,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 636 transitions, 3720 flow [2022-11-23 03:47:28,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 636 transitions, 3684 flow, removed 10 selfloop flow, removed 2 redundant places. [2022-11-23 03:47:28,228 INFO L231 Difference]: Finished difference. Result has 121 places, 195 transitions, 1729 flow [2022-11-23 03:47:28,228 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=478, PETRI_DIFFERENCE_MINUEND_FLOW=252, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=1729, PETRI_PLACES=121, PETRI_TRANSITIONS=195} [2022-11-23 03:47:28,229 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, 77 predicate places. [2022-11-23 03:47:28,229 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 195 transitions, 1729 flow [2022-11-23 03:47:28,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 148.4) internal successors, (4452), 30 states have internal predecessors, (4452), 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) [2022-11-23 03:47:28,232 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:47:28,232 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:47:28,243 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a78787a-32db-4a5f-a5cb-18016b554397/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 03:47:28,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a78787a-32db-4a5f-a5cb-18016b554397/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:47:28,439 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-23 03:47:28,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:47:28,440 INFO L85 PathProgramCache]: Analyzing trace with hash 108659190, now seen corresponding path program 2 times [2022-11-23 03:47:28,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:47:28,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736555904] [2022-11-23 03:47:28,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:47:28,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:47:28,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:47:31,249 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:47:31,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:47:31,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736555904] [2022-11-23 03:47:31,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736555904] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:47:31,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718412690] [2022-11-23 03:47:31,250 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 03:47:31,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:47:31,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a78787a-32db-4a5f-a5cb-18016b554397/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:47:31,258 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a78787a-32db-4a5f-a5cb-18016b554397/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:47:31,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a78787a-32db-4a5f-a5cb-18016b554397/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 03:47:31,496 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 03:47:31,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:47:31,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-23 03:47:31,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:47:31,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:47:31,848 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 18 treesize of output 20 [2022-11-23 03:47:31,916 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 23 treesize of output 7 [2022-11-23 03:47:31,957 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 03:47:31,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:47:32,080 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_263 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_263) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset)) c_~total~0))) is different from false [2022-11-23 03:47:32,100 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 03:47:32,101 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 46 treesize of output 42 [2022-11-23 03:47:32,107 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 5 [2022-11-23 03:47:32,342 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 03:47:32,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718412690] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:47:32,343 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:47:32,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 6] total 20 [2022-11-23 03:47:32,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446353386] [2022-11-23 03:47:32,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:47:32,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-23 03:47:32,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:47:32,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-23 03:47:32,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=363, Unknown=1, NotChecked=38, Total=462 [2022-11-23 03:47:32,749 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 478 [2022-11-23 03:47:32,753 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 195 transitions, 1729 flow. Second operand has 22 states, 22 states have (on average 155.6818181818182) internal successors, (3425), 22 states have internal predecessors, (3425), 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) [2022-11-23 03:47:32,753 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:47:32,753 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 478 [2022-11-23 03:47:32,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:47:44,233 INFO L130 PetriNetUnfolder]: 47682/63115 cut-off events. [2022-11-23 03:47:44,234 INFO L131 PetriNetUnfolder]: For 226848/226902 co-relation queries the response was YES. [2022-11-23 03:47:44,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 239259 conditions, 63115 events. 47682/63115 cut-off events. For 226848/226902 co-relation queries the response was YES. Maximal size of possible extension queue 2425. Compared 377130 event pairs, 6168 based on Foata normal form. 4/56301 useless extension candidates. Maximal degree in co-relation 231206. Up to 34078 conditions per place. [2022-11-23 03:47:45,201 INFO L137 encePairwiseOnDemand]: 468/478 looper letters, 273 selfloop transitions, 101 changer transitions 11/389 dead transitions. [2022-11-23 03:47:45,201 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 389 transitions, 3868 flow [2022-11-23 03:47:45,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-23 03:47:45,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-23 03:47:45,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2148 transitions. [2022-11-23 03:47:45,209 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3456710653363373 [2022-11-23 03:47:45,209 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2148 transitions. [2022-11-23 03:47:45,209 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2148 transitions. [2022-11-23 03:47:45,211 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:47:45,211 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2148 transitions. [2022-11-23 03:47:45,215 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 165.23076923076923) internal successors, (2148), 13 states have internal predecessors, (2148), 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) [2022-11-23 03:47:45,224 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 478.0) internal successors, (6692), 14 states have internal predecessors, (6692), 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) [2022-11-23 03:47:45,227 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 478.0) internal successors, (6692), 14 states have internal predecessors, (6692), 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) [2022-11-23 03:47:45,228 INFO L175 Difference]: Start difference. First operand has 121 places, 195 transitions, 1729 flow. Second operand 13 states and 2148 transitions. [2022-11-23 03:47:45,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 389 transitions, 3868 flow [2022-11-23 03:47:53,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 389 transitions, 3758 flow, removed 54 selfloop flow, removed 1 redundant places. [2022-11-23 03:47:53,787 INFO L231 Difference]: Finished difference. Result has 135 places, 247 transitions, 2487 flow [2022-11-23 03:47:53,787 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=478, PETRI_DIFFERENCE_MINUEND_FLOW=1645, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2487, PETRI_PLACES=135, PETRI_TRANSITIONS=247} [2022-11-23 03:47:53,788 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, 91 predicate places. [2022-11-23 03:47:53,788 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 247 transitions, 2487 flow [2022-11-23 03:47:53,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 155.6818181818182) internal successors, (3425), 22 states have internal predecessors, (3425), 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) [2022-11-23 03:47:53,790 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:47:53,790 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:47:53,799 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a78787a-32db-4a5f-a5cb-18016b554397/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 03:47:53,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a78787a-32db-4a5f-a5cb-18016b554397/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:47:53,991 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-23 03:47:53,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:47:53,992 INFO L85 PathProgramCache]: Analyzing trace with hash -882222896, now seen corresponding path program 3 times [2022-11-23 03:47:53,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:47:53,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435751376] [2022-11-23 03:47:53,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:47:53,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:47:54,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:47:56,821 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:47:56,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:47:56,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435751376] [2022-11-23 03:47:56,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435751376] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:47:56,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306116952] [2022-11-23 03:47:56,822 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 03:47:56,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:47:56,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a78787a-32db-4a5f-a5cb-18016b554397/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:47:56,824 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a78787a-32db-4a5f-a5cb-18016b554397/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:47:56,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a78787a-32db-4a5f-a5cb-18016b554397/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 03:47:57,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-23 03:47:57,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:47:57,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-23 03:47:57,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:47:57,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:47:57,532 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 18 treesize of output 20 [2022-11-23 03:47:57,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:47:57,624 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 18 treesize of output 20 [2022-11-23 03:47:57,741 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 23 treesize of output 7 [2022-11-23 03:47:57,757 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 03:47:57,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:47:57,890 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_333 (Array Int Int))) (< 0 (+ c_~total~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t4~0#1.base| v_ArrVal_333) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset))))) is different from false [2022-11-23 03:47:58,030 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 03:47:58,031 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 174 treesize of output 162 [2022-11-23 03:47:58,041 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 73 treesize of output 61 [2022-11-23 03:47:58,049 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 134 treesize of output 110 [2022-11-23 03:47:58,445 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 03:47:58,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306116952] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:47:58,446 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:47:58,446 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 22 [2022-11-23 03:47:58,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041621944] [2022-11-23 03:47:58,446 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:47:58,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-23 03:47:58,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:47:58,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-23 03:47:58,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=436, Unknown=2, NotChecked=42, Total=552 [2022-11-23 03:47:58,602 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 478 [2022-11-23 03:47:58,606 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 247 transitions, 2487 flow. Second operand has 24 states, 24 states have (on average 156.20833333333334) internal successors, (3749), 24 states have internal predecessors, (3749), 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) [2022-11-23 03:47:58,606 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:47:58,606 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 478 [2022-11-23 03:47:58,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:48:15,249 INFO L130 PetriNetUnfolder]: 63910/84326 cut-off events. [2022-11-23 03:48:15,249 INFO L131 PetriNetUnfolder]: For 371722/371776 co-relation queries the response was YES. [2022-11-23 03:48:15,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 340395 conditions, 84326 events. 63910/84326 cut-off events. For 371722/371776 co-relation queries the response was YES. Maximal size of possible extension queue 3429. Compared 521592 event pairs, 9426 based on Foata normal form. 4/75178 useless extension candidates. Maximal degree in co-relation 332545. Up to 35097 conditions per place. [2022-11-23 03:48:16,185 INFO L137 encePairwiseOnDemand]: 468/478 looper letters, 300 selfloop transitions, 158 changer transitions 11/473 dead transitions. [2022-11-23 03:48:16,185 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 473 transitions, 5126 flow [2022-11-23 03:48:16,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-23 03:48:16,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-23 03:48:16,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2322 transitions. [2022-11-23 03:48:16,201 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.34698147041243277 [2022-11-23 03:48:16,202 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2322 transitions. [2022-11-23 03:48:16,202 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2322 transitions. [2022-11-23 03:48:16,205 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:48:16,206 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2322 transitions. [2022-11-23 03:48:16,212 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 165.85714285714286) internal successors, (2322), 14 states have internal predecessors, (2322), 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) [2022-11-23 03:48:16,224 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 478.0) internal successors, (7170), 15 states have internal predecessors, (7170), 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) [2022-11-23 03:48:16,227 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 478.0) internal successors, (7170), 15 states have internal predecessors, (7170), 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) [2022-11-23 03:48:16,227 INFO L175 Difference]: Start difference. First operand has 135 places, 247 transitions, 2487 flow. Second operand 14 states and 2322 transitions. [2022-11-23 03:48:16,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 473 transitions, 5126 flow [2022-11-23 03:48:32,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 473 transitions, 5090 flow, removed 14 selfloop flow, removed 3 redundant places. [2022-11-23 03:48:32,259 INFO L231 Difference]: Finished difference. Result has 149 places, 307 transitions, 3652 flow [2022-11-23 03:48:32,260 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=478, PETRI_DIFFERENCE_MINUEND_FLOW=2459, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=3652, PETRI_PLACES=149, PETRI_TRANSITIONS=307} [2022-11-23 03:48:32,260 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, 105 predicate places. [2022-11-23 03:48:32,261 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 307 transitions, 3652 flow [2022-11-23 03:48:32,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 156.20833333333334) internal successors, (3749), 24 states have internal predecessors, (3749), 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) [2022-11-23 03:48:32,262 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:48:32,262 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:48:32,267 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a78787a-32db-4a5f-a5cb-18016b554397/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 03:48:32,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a78787a-32db-4a5f-a5cb-18016b554397/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-23 03:48:32,463 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-23 03:48:32,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:48:32,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1811350714, now seen corresponding path program 1 times [2022-11-23 03:48:32,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:48:32,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452662489] [2022-11-23 03:48:32,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:48:32,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:48:32,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:48:35,210 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:48:35,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:48:35,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452662489] [2022-11-23 03:48:35,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452662489] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:48:35,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957732469] [2022-11-23 03:48:35,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:48:35,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:48:35,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a78787a-32db-4a5f-a5cb-18016b554397/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:48:35,213 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a78787a-32db-4a5f-a5cb-18016b554397/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:48:35,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a78787a-32db-4a5f-a5cb-18016b554397/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 03:48:35,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:48:35,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-23 03:48:35,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:48:35,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:48:35,899 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 18 treesize of output 20 [2022-11-23 03:48:36,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:48:36,038 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 18 treesize of output 20 [2022-11-23 03:48:36,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:48:36,130 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 18 treesize of output 20 [2022-11-23 03:48:36,333 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 23 treesize of output 7 [2022-11-23 03:48:36,515 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 03:48:36,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:48:37,277 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 03:48:37,278 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 342 treesize of output 330 [2022-11-23 03:48:37,290 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 162 treesize of output 150 [2022-11-23 03:48:37,298 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 302 treesize of output 278 [2022-11-23 03:48:37,307 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 278 treesize of output 230 [2022-11-23 03:48:37,770 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 03:48:37,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957732469] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:48:37,771 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:48:37,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12, 11] total 30 [2022-11-23 03:48:37,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534012076] [2022-11-23 03:48:37,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:48:37,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-23 03:48:37,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:48:37,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-23 03:48:37,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=866, Unknown=8, NotChecked=0, Total=992 [2022-11-23 03:48:41,608 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 03:48:44,519 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 478 [2022-11-23 03:48:44,522 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 307 transitions, 3652 flow. Second operand has 32 states, 32 states have (on average 145.46875) internal successors, (4655), 32 states have internal predecessors, (4655), 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) [2022-11-23 03:48:44,523 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:48:44,523 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 478 [2022-11-23 03:48:44,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand