./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_01-simple_racing.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e030e482-91d5-4850-8729-5625e4fd164e/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e030e482-91d5-4850-8729-5625e4fd164e/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e030e482-91d5-4850-8729-5625e4fd164e/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e030e482-91d5-4850-8729-5625e4fd164e/bin/uautomizer-tPACEb0tL8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_01-simple_racing.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e030e482-91d5-4850-8729-5625e4fd164e/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e030e482-91d5-4850-8729-5625e4fd164e/bin/uautomizer-tPACEb0tL8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash eddb66a74cd149f880832378d52d5c02c94fd6efcf2d83aeade11bcdaaabe426 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-e04fb08 [2022-11-16 12:51:49,181 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 12:51:49,183 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 12:51:49,209 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 12:51:49,210 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 12:51:49,217 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 12:51:49,218 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 12:51:49,220 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 12:51:49,222 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 12:51:49,227 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 12:51:49,228 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 12:51:49,232 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 12:51:49,232 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 12:51:49,238 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 12:51:49,239 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 12:51:49,240 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 12:51:49,241 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 12:51:49,242 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 12:51:49,243 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 12:51:49,245 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 12:51:49,250 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 12:51:49,253 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 12:51:49,257 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 12:51:49,259 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 12:51:49,273 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 12:51:49,275 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 12:51:49,276 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 12:51:49,277 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 12:51:49,278 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 12:51:49,279 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 12:51:49,280 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 12:51:49,282 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 12:51:49,284 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 12:51:49,285 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 12:51:49,289 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 12:51:49,289 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 12:51:49,290 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 12:51:49,290 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 12:51:49,291 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 12:51:49,291 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 12:51:49,292 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 12:51:49,293 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e030e482-91d5-4850-8729-5625e4fd164e/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-16 12:51:49,332 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 12:51:49,332 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 12:51:49,333 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 12:51:49,333 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 12:51:49,334 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 12:51:49,335 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 12:51:49,335 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 12:51:49,336 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 12:51:49,336 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 12:51:49,336 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 12:51:49,337 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 12:51:49,338 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 12:51:49,338 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 12:51:49,338 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 12:51:49,338 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 12:51:49,338 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 12:51:49,339 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 12:51:49,339 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 12:51:49,339 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 12:51:49,339 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 12:51:49,339 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 12:51:49,340 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 12:51:49,340 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 12:51:49,340 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 12:51:49,340 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:51:49,340 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 12:51:49,342 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 12:51:49,342 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 12:51:49,343 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 12:51:49,343 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 12:51:49,343 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-16 12:51:49,343 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-16 12:51:49,344 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 12:51:49,344 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e030e482-91d5-4850-8729-5625e4fd164e/bin/uautomizer-tPACEb0tL8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e030e482-91d5-4850-8729-5625e4fd164e/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> eddb66a74cd149f880832378d52d5c02c94fd6efcf2d83aeade11bcdaaabe426 [2022-11-16 12:51:49,660 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 12:51:49,700 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 12:51:49,703 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 12:51:49,705 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 12:51:49,706 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 12:51:49,707 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e030e482-91d5-4850-8729-5625e4fd164e/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/goblint-regression/28-race_reach_01-simple_racing.i [2022-11-16 12:51:49,788 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e030e482-91d5-4850-8729-5625e4fd164e/bin/uautomizer-tPACEb0tL8/data/2d9ffd399/ad3ce84be1c44b46b66db75d2ab0d85e/FLAG15d9a2283 [2022-11-16 12:51:50,448 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 12:51:50,449 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e030e482-91d5-4850-8729-5625e4fd164e/sv-benchmarks/c/goblint-regression/28-race_reach_01-simple_racing.i [2022-11-16 12:51:50,463 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e030e482-91d5-4850-8729-5625e4fd164e/bin/uautomizer-tPACEb0tL8/data/2d9ffd399/ad3ce84be1c44b46b66db75d2ab0d85e/FLAG15d9a2283 [2022-11-16 12:51:50,685 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e030e482-91d5-4850-8729-5625e4fd164e/bin/uautomizer-tPACEb0tL8/data/2d9ffd399/ad3ce84be1c44b46b66db75d2ab0d85e [2022-11-16 12:51:50,688 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 12:51:50,689 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 12:51:50,691 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 12:51:50,692 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 12:51:50,696 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 12:51:50,697 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:51:50" (1/1) ... [2022-11-16 12:51:50,698 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@aaadb86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:51:50, skipping insertion in model container [2022-11-16 12:51:50,699 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:51:50" (1/1) ... [2022-11-16 12:51:50,708 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 12:51:50,751 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 12:51:51,260 WARN L229 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e030e482-91d5-4850-8729-5625e4fd164e/sv-benchmarks/c/goblint-regression/28-race_reach_01-simple_racing.i[30176,30189] [2022-11-16 12:51:51,285 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:51:51,310 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 12:51:51,358 WARN L229 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e030e482-91d5-4850-8729-5625e4fd164e/sv-benchmarks/c/goblint-regression/28-race_reach_01-simple_racing.i[30176,30189] [2022-11-16 12:51:51,377 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:51:51,426 INFO L208 MainTranslator]: Completed translation [2022-11-16 12:51:51,426 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:51:51 WrapperNode [2022-11-16 12:51:51,427 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 12:51:51,428 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 12:51:51,428 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 12:51:51,428 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 12:51:51,436 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:51:51" (1/1) ... [2022-11-16 12:51:51,468 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:51:51" (1/1) ... [2022-11-16 12:51:51,505 INFO L138 Inliner]: procedures = 170, calls = 36, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 79 [2022-11-16 12:51:51,505 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 12:51:51,506 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 12:51:51,507 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 12:51:51,507 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 12:51:51,517 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:51:51" (1/1) ... [2022-11-16 12:51:51,518 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:51:51" (1/1) ... [2022-11-16 12:51:51,526 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:51:51" (1/1) ... [2022-11-16 12:51:51,527 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:51:51" (1/1) ... [2022-11-16 12:51:51,539 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:51:51" (1/1) ... [2022-11-16 12:51:51,550 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:51:51" (1/1) ... [2022-11-16 12:51:51,557 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:51:51" (1/1) ... [2022-11-16 12:51:51,563 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:51:51" (1/1) ... [2022-11-16 12:51:51,566 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 12:51:51,574 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 12:51:51,574 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 12:51:51,574 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 12:51:51,575 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:51:51" (1/1) ... [2022-11-16 12:51:51,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:51:51,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e030e482-91d5-4850-8729-5625e4fd164e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:51:51,611 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e030e482-91d5-4850-8729-5625e4fd164e/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 12:51:51,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e030e482-91d5-4850-8729-5625e4fd164e/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 12:51:51,670 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 12:51:51,671 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 12:51:51,671 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-16 12:51:51,671 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 12:51:51,671 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 12:51:51,671 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-11-16 12:51:51,672 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-11-16 12:51:51,672 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 12:51:51,672 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 12:51:51,673 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 12:51:51,673 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 12:51:51,674 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-16 12:51:51,815 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 12:51:51,817 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 12:51:52,045 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 12:51:52,054 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 12:51:52,070 INFO L300 CfgBuilder]: Removed 10 assume(true) statements. [2022-11-16 12:51:52,073 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:51:52 BoogieIcfgContainer [2022-11-16 12:51:52,073 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 12:51:52,075 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 12:51:52,075 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 12:51:52,079 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 12:51:52,079 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 12:51:50" (1/3) ... [2022-11-16 12:51:52,080 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69f75d81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:51:52, skipping insertion in model container [2022-11-16 12:51:52,090 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:51:51" (2/3) ... [2022-11-16 12:51:52,091 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69f75d81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:51:52, skipping insertion in model container [2022-11-16 12:51:52,091 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:51:52" (3/3) ... [2022-11-16 12:51:52,093 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_01-simple_racing.i [2022-11-16 12:51:52,103 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-16 12:51:52,129 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 12:51:52,129 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 12:51:52,130 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-16 12:51:52,236 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-11-16 12:51:52,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 103 places, 112 transitions, 232 flow [2022-11-16 12:51:52,407 INFO L130 PetriNetUnfolder]: 17/148 cut-off events. [2022-11-16 12:51:52,407 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-16 12:51:52,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154 conditions, 148 events. 17/148 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 324 event pairs, 0 based on Foata normal form. 0/126 useless extension candidates. Maximal degree in co-relation 72. Up to 4 conditions per place. [2022-11-16 12:51:52,415 INFO L82 GeneralOperation]: Start removeDead. Operand has 103 places, 112 transitions, 232 flow [2022-11-16 12:51:52,420 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 99 places, 107 transitions, 219 flow [2022-11-16 12:51:52,443 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 12:51:52,454 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;@102a40f3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 12:51:52,455 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-16 12:51:52,484 INFO L130 PetriNetUnfolder]: 3/77 cut-off events. [2022-11-16 12:51:52,484 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-16 12:51:52,484 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:51:52,485 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:51:52,486 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:51:52,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:51:52,491 INFO L85 PathProgramCache]: Analyzing trace with hash 115216162, now seen corresponding path program 1 times [2022-11-16 12:51:52,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:51:52,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670682538] [2022-11-16 12:51:52,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:51:52,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:51:52,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:51:52,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:51:52,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:51:52,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670682538] [2022-11-16 12:51:52,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670682538] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:51:52,797 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:51:52,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:51:52,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72718860] [2022-11-16 12:51:52,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:51:52,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 12:51:52,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:51:52,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 12:51:52,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 12:51:52,865 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 112 [2022-11-16 12:51:52,870 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 107 transitions, 219 flow. Second operand has 2 states, 2 states have (on average 98.5) internal successors, (197), 2 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:51:52,870 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:51:52,870 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 112 [2022-11-16 12:51:52,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:51:52,944 INFO L130 PetriNetUnfolder]: 0/125 cut-off events. [2022-11-16 12:51:52,944 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-16 12:51:52,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132 conditions, 125 events. 0/125 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 195 event pairs, 0 based on Foata normal form. 16/135 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2022-11-16 12:51:52,946 INFO L137 encePairwiseOnDemand]: 101/112 looper letters, 1 selfloop transitions, 0 changer transitions 15/95 dead transitions. [2022-11-16 12:51:52,946 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 95 transitions, 197 flow [2022-11-16 12:51:52,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 12:51:52,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-16 12:51:52,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 208 transitions. [2022-11-16 12:51:52,962 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9285714285714286 [2022-11-16 12:51:52,963 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 208 transitions. [2022-11-16 12:51:52,964 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 208 transitions. [2022-11-16 12:51:52,967 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:51:52,970 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 208 transitions. [2022-11-16 12:51:52,977 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 104.0) internal successors, (208), 2 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:51:52,984 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 112.0) internal successors, (336), 3 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:51:52,986 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 112.0) internal successors, (336), 3 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:51:52,988 INFO L175 Difference]: Start difference. First operand has 99 places, 107 transitions, 219 flow. Second operand 2 states and 208 transitions. [2022-11-16 12:51:52,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 95 transitions, 197 flow [2022-11-16 12:51:52,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 95 transitions, 197 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-16 12:51:52,998 INFO L231 Difference]: Finished difference. Result has 99 places, 80 transitions, 165 flow [2022-11-16 12:51:53,000 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=112, PETRI_DIFFERENCE_MINUEND_FLOW=195, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=165, PETRI_PLACES=99, PETRI_TRANSITIONS=80} [2022-11-16 12:51:53,010 INFO L288 CegarLoopForPetriNet]: 99 programPoint places, 0 predicate places. [2022-11-16 12:51:53,011 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 80 transitions, 165 flow [2022-11-16 12:51:53,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 98.5) internal successors, (197), 2 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:51:53,012 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:51:53,012 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:51:53,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 12:51:53,013 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:51:53,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:51:53,014 INFO L85 PathProgramCache]: Analyzing trace with hash -1681735197, now seen corresponding path program 1 times [2022-11-16 12:51:53,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:51:53,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776363981] [2022-11-16 12:51:53,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:51:53,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:51:53,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:51:53,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:51:53,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:51:53,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776363981] [2022-11-16 12:51:53,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776363981] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:51:53,163 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:51:53,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:51:53,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952456196] [2022-11-16 12:51:53,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:51:53,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:51:53,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:51:53,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:51:53,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:51:53,167 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 112 [2022-11-16 12:51:53,168 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 80 transitions, 165 flow. Second operand has 3 states, 3 states have (on average 92.0) internal successors, (276), 3 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:51:53,168 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:51:53,168 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 112 [2022-11-16 12:51:53,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:51:53,202 INFO L130 PetriNetUnfolder]: 0/84 cut-off events. [2022-11-16 12:51:53,202 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-16 12:51:53,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101 conditions, 84 events. 0/84 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 50 event pairs, 0 based on Foata normal form. 0/83 useless extension candidates. Maximal degree in co-relation 0. Up to 6 conditions per place. [2022-11-16 12:51:53,203 INFO L137 encePairwiseOnDemand]: 109/112 looper letters, 8 selfloop transitions, 2 changer transitions 0/82 dead transitions. [2022-11-16 12:51:53,203 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 82 transitions, 189 flow [2022-11-16 12:51:53,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:51:53,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-16 12:51:53,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 284 transitions. [2022-11-16 12:51:53,205 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8452380952380952 [2022-11-16 12:51:53,205 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 284 transitions. [2022-11-16 12:51:53,205 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 284 transitions. [2022-11-16 12:51:53,206 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:51:53,206 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 284 transitions. [2022-11-16 12:51:53,207 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 94.66666666666667) internal successors, (284), 3 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:51:53,209 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 112.0) internal successors, (448), 4 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:51:53,209 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 112.0) internal successors, (448), 4 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:51:53,209 INFO L175 Difference]: Start difference. First operand has 99 places, 80 transitions, 165 flow. Second operand 3 states and 284 transitions. [2022-11-16 12:51:53,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 82 transitions, 189 flow [2022-11-16 12:51:53,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 82 transitions, 189 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-16 12:51:53,214 INFO L231 Difference]: Finished difference. Result has 87 places, 80 transitions, 173 flow [2022-11-16 12:51:53,214 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=112, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=173, PETRI_PLACES=87, PETRI_TRANSITIONS=80} [2022-11-16 12:51:53,215 INFO L288 CegarLoopForPetriNet]: 99 programPoint places, -12 predicate places. [2022-11-16 12:51:53,215 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 80 transitions, 173 flow [2022-11-16 12:51:53,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 92.0) internal successors, (276), 3 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:51:53,216 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:51:53,216 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:51:53,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 12:51:53,216 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:51:53,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:51:53,217 INFO L85 PathProgramCache]: Analyzing trace with hash 1191832280, now seen corresponding path program 1 times [2022-11-16 12:51:53,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:51:53,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163739968] [2022-11-16 12:51:53,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:51:53,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:51:53,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:51:53,287 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-16 12:51:53,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:51:53,372 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-16 12:51:53,372 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-16 12:51:53,373 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-16 12:51:53,376 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-16 12:51:53,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-16 12:51:53,376 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-11-16 12:51:53,380 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-16 12:51:53,380 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-16 12:51:53,454 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-16 12:51:53,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 128 places, 142 transitions, 302 flow [2022-11-16 12:51:53,543 INFO L130 PetriNetUnfolder]: 31/239 cut-off events. [2022-11-16 12:51:53,543 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-11-16 12:51:53,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 253 conditions, 239 events. 31/239 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 664 event pairs, 0 based on Foata normal form. 0/201 useless extension candidates. Maximal degree in co-relation 150. Up to 8 conditions per place. [2022-11-16 12:51:53,549 INFO L82 GeneralOperation]: Start removeDead. Operand has 128 places, 142 transitions, 302 flow [2022-11-16 12:51:53,553 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 128 places, 142 transitions, 302 flow [2022-11-16 12:51:53,564 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 12:51:53,566 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;@102a40f3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 12:51:53,566 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-16 12:51:53,584 INFO L130 PetriNetUnfolder]: 3/77 cut-off events. [2022-11-16 12:51:53,584 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-16 12:51:53,584 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:51:53,584 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:51:53,585 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:51:53,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:51:53,585 INFO L85 PathProgramCache]: Analyzing trace with hash 1268592496, now seen corresponding path program 1 times [2022-11-16 12:51:53,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:51:53,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868548184] [2022-11-16 12:51:53,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:51:53,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:51:53,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:51:53,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:51:53,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:51:53,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868548184] [2022-11-16 12:51:53,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868548184] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:51:53,693 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:51:53,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:51:53,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044674557] [2022-11-16 12:51:53,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:51:53,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 12:51:53,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:51:53,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 12:51:53,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 12:51:53,700 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 142 [2022-11-16 12:51:53,701 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 142 transitions, 302 flow. Second operand has 2 states, 2 states have (on average 120.5) internal successors, (241), 2 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:51:53,701 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:51:53,701 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 142 [2022-11-16 12:51:53,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:51:53,759 INFO L130 PetriNetUnfolder]: 3/208 cut-off events. [2022-11-16 12:51:53,760 INFO L131 PetriNetUnfolder]: For 20/26 co-relation queries the response was YES. [2022-11-16 12:51:53,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 229 conditions, 208 events. 3/208 cut-off events. For 20/26 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 514 event pairs, 0 based on Foata normal form. 42/240 useless extension candidates. Maximal degree in co-relation 134. Up to 7 conditions per place. [2022-11-16 12:51:53,764 INFO L137 encePairwiseOnDemand]: 125/142 looper letters, 2 selfloop transitions, 0 changer transitions 21/124 dead transitions. [2022-11-16 12:51:53,764 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 124 transitions, 274 flow [2022-11-16 12:51:53,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 12:51:53,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-16 12:51:53,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 261 transitions. [2022-11-16 12:51:53,771 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9190140845070423 [2022-11-16 12:51:53,771 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 261 transitions. [2022-11-16 12:51:53,771 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 261 transitions. [2022-11-16 12:51:53,771 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:51:53,772 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 261 transitions. [2022-11-16 12:51:53,774 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 130.5) internal successors, (261), 2 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:51:53,777 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 142.0) internal successors, (426), 3 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:51:53,778 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 142.0) internal successors, (426), 3 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:51:53,778 INFO L175 Difference]: Start difference. First operand has 128 places, 142 transitions, 302 flow. Second operand 2 states and 261 transitions. [2022-11-16 12:51:53,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 124 transitions, 274 flow [2022-11-16 12:51:53,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 124 transitions, 274 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-16 12:51:53,786 INFO L231 Difference]: Finished difference. Result has 128 places, 103 transitions, 218 flow [2022-11-16 12:51:53,786 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=266, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=218, PETRI_PLACES=128, PETRI_TRANSITIONS=103} [2022-11-16 12:51:53,789 INFO L288 CegarLoopForPetriNet]: 128 programPoint places, 0 predicate places. [2022-11-16 12:51:53,789 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 103 transitions, 218 flow [2022-11-16 12:51:53,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 120.5) internal successors, (241), 2 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:51:53,790 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:51:53,790 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:51:53,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-16 12:51:53,791 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:51:53,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:51:53,792 INFO L85 PathProgramCache]: Analyzing trace with hash -528358863, now seen corresponding path program 1 times [2022-11-16 12:51:53,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:51:53,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111760295] [2022-11-16 12:51:53,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:51:53,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:51:53,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:51:53,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:51:53,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:51:53,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111760295] [2022-11-16 12:51:53,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111760295] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:51:53,893 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:51:53,893 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:51:53,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640105530] [2022-11-16 12:51:53,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:51:53,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:51:53,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:51:53,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:51:53,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:51:53,895 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 142 [2022-11-16 12:51:53,896 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 103 transitions, 218 flow. Second operand has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:51:53,896 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:51:53,896 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 142 [2022-11-16 12:51:53,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:51:53,939 INFO L130 PetriNetUnfolder]: 0/127 cut-off events. [2022-11-16 12:51:53,940 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-16 12:51:53,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155 conditions, 127 events. 0/127 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 187 event pairs, 0 based on Foata normal form. 0/125 useless extension candidates. Maximal degree in co-relation 0. Up to 12 conditions per place. [2022-11-16 12:51:53,940 INFO L137 encePairwiseOnDemand]: 139/142 looper letters, 11 selfloop transitions, 2 changer transitions 0/107 dead transitions. [2022-11-16 12:51:53,941 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 107 transitions, 252 flow [2022-11-16 12:51:53,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:51:53,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-16 12:51:53,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 353 transitions. [2022-11-16 12:51:53,956 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8286384976525821 [2022-11-16 12:51:53,956 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 353 transitions. [2022-11-16 12:51:53,956 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 353 transitions. [2022-11-16 12:51:53,957 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:51:53,957 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 353 transitions. [2022-11-16 12:51:53,958 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 117.66666666666667) internal successors, (353), 3 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:51:53,959 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 142.0) internal successors, (568), 4 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:51:53,960 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 142.0) internal successors, (568), 4 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:51:53,960 INFO L175 Difference]: Start difference. First operand has 128 places, 103 transitions, 218 flow. Second operand 3 states and 353 transitions. [2022-11-16 12:51:53,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 107 transitions, 252 flow [2022-11-16 12:51:53,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 107 transitions, 250 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-11-16 12:51:53,963 INFO L231 Difference]: Finished difference. Result has 112 places, 104 transitions, 228 flow [2022-11-16 12:51:53,963 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=228, PETRI_PLACES=112, PETRI_TRANSITIONS=104} [2022-11-16 12:51:53,964 INFO L288 CegarLoopForPetriNet]: 128 programPoint places, -16 predicate places. [2022-11-16 12:51:53,964 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 104 transitions, 228 flow [2022-11-16 12:51:53,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:51:53,965 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:51:53,965 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:51:53,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-16 12:51:53,966 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:51:53,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:51:53,966 INFO L85 PathProgramCache]: Analyzing trace with hash 579402295, now seen corresponding path program 1 times [2022-11-16 12:51:53,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:51:53,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301471802] [2022-11-16 12:51:53,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:51:53,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:51:54,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:51:54,174 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:51:54,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:51:54,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301471802] [2022-11-16 12:51:54,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301471802] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:51:54,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131291914] [2022-11-16 12:51:54,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:51:54,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:51:54,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e030e482-91d5-4850-8729-5625e4fd164e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:51:54,187 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e030e482-91d5-4850-8729-5625e4fd164e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:51:54,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e030e482-91d5-4850-8729-5625e4fd164e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 12:51:54,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:51:54,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 12:51:54,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:51:54,381 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:51:54,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:51:54,462 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:51:54,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131291914] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:51:54,462 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:51:54,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-16 12:51:54,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82951493] [2022-11-16 12:51:54,463 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:51:54,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 12:51:54,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:51:54,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 12:51:54,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:51:54,467 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 142 [2022-11-16 12:51:54,469 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 104 transitions, 228 flow. Second operand has 10 states, 10 states have (on average 114.3) internal successors, (1143), 10 states have internal predecessors, (1143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:51:54,469 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:51:54,469 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 142 [2022-11-16 12:51:54,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:51:54,603 INFO L130 PetriNetUnfolder]: 0/105 cut-off events. [2022-11-16 12:51:54,603 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-16 12:51:54,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138 conditions, 105 events. 0/105 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 83 event pairs, 0 based on Foata normal form. 2/107 useless extension candidates. Maximal degree in co-relation 0. Up to 4 conditions per place. [2022-11-16 12:51:54,604 INFO L137 encePairwiseOnDemand]: 137/142 looper letters, 9 selfloop transitions, 7 changer transitions 0/99 dead transitions. [2022-11-16 12:51:54,604 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 99 transitions, 248 flow [2022-11-16 12:51:54,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:51:54,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-16 12:51:54,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1026 transitions. [2022-11-16 12:51:54,607 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8028169014084507 [2022-11-16 12:51:54,608 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1026 transitions. [2022-11-16 12:51:54,608 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1026 transitions. [2022-11-16 12:51:54,609 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:51:54,609 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1026 transitions. [2022-11-16 12:51:54,611 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 114.0) internal successors, (1026), 9 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:51:54,614 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 142.0) internal successors, (1420), 10 states have internal predecessors, (1420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:51:54,615 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 142.0) internal successors, (1420), 10 states have internal predecessors, (1420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:51:54,615 INFO L175 Difference]: Start difference. First operand has 112 places, 104 transitions, 228 flow. Second operand 9 states and 1026 transitions. [2022-11-16 12:51:54,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 99 transitions, 248 flow [2022-11-16 12:51:54,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 99 transitions, 246 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-16 12:51:54,618 INFO L231 Difference]: Finished difference. Result has 108 places, 95 transitions, 220 flow [2022-11-16 12:51:54,618 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=220, PETRI_PLACES=108, PETRI_TRANSITIONS=95} [2022-11-16 12:51:54,619 INFO L288 CegarLoopForPetriNet]: 128 programPoint places, -20 predicate places. [2022-11-16 12:51:54,619 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 95 transitions, 220 flow [2022-11-16 12:51:54,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 114.3) internal successors, (1143), 10 states have internal predecessors, (1143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:51:54,620 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:51:54,620 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:51:54,632 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e030e482-91d5-4850-8729-5625e4fd164e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 12:51:54,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e030e482-91d5-4850-8729-5625e4fd164e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:51:54,827 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:51:54,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:51:54,827 INFO L85 PathProgramCache]: Analyzing trace with hash -222376795, now seen corresponding path program 1 times [2022-11-16 12:51:54,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:51:54,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033735075] [2022-11-16 12:51:54,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:51:54,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:51:54,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:51:54,868 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-16 12:51:54,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:51:54,901 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-16 12:51:54,901 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-16 12:51:54,901 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-16 12:51:54,901 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-16 12:51:54,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-16 12:51:54,902 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-11-16 12:51:54,903 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-16 12:51:54,903 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-16 12:51:54,954 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-16 12:51:54,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 153 places, 172 transitions, 374 flow [2022-11-16 12:51:55,078 INFO L130 PetriNetUnfolder]: 50/363 cut-off events. [2022-11-16 12:51:55,078 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-11-16 12:51:55,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 391 conditions, 363 events. 50/363 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1153 event pairs, 1 based on Foata normal form. 0/305 useless extension candidates. Maximal degree in co-relation 247. Up to 16 conditions per place. [2022-11-16 12:51:55,084 INFO L82 GeneralOperation]: Start removeDead. Operand has 153 places, 172 transitions, 374 flow [2022-11-16 12:51:55,089 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 153 places, 172 transitions, 374 flow [2022-11-16 12:51:55,094 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 12:51:55,102 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;@102a40f3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 12:51:55,103 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-16 12:51:55,111 INFO L130 PetriNetUnfolder]: 3/77 cut-off events. [2022-11-16 12:51:55,117 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-16 12:51:55,118 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:51:55,118 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:51:55,118 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:51:55,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:51:55,119 INFO L85 PathProgramCache]: Analyzing trace with hash -903417444, now seen corresponding path program 1 times [2022-11-16 12:51:55,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:51:55,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83111969] [2022-11-16 12:51:55,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:51:55,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:51:55,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:51:55,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:51:55,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:51:55,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83111969] [2022-11-16 12:51:55,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83111969] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:51:55,171 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:51:55,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:51:55,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479471052] [2022-11-16 12:51:55,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:51:55,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 12:51:55,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:51:55,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 12:51:55,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 12:51:55,176 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 172 [2022-11-16 12:51:55,177 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 172 transitions, 374 flow. Second operand has 2 states, 2 states have (on average 142.5) internal successors, (285), 2 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:51:55,177 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:51:55,177 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 172 [2022-11-16 12:51:55,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:51:55,278 INFO L130 PetriNetUnfolder]: 8/317 cut-off events. [2022-11-16 12:51:55,278 INFO L131 PetriNetUnfolder]: For 50/58 co-relation queries the response was YES. [2022-11-16 12:51:55,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 361 conditions, 317 events. 8/317 cut-off events. For 50/58 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 977 event pairs, 1 based on Foata normal form. 106/407 useless extension candidates. Maximal degree in co-relation 222. Up to 16 conditions per place. [2022-11-16 12:51:55,281 INFO L137 encePairwiseOnDemand]: 149/172 looper letters, 3 selfloop transitions, 0 changer transitions 22/148 dead transitions. [2022-11-16 12:51:55,281 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 148 transitions, 338 flow [2022-11-16 12:51:55,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 12:51:55,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-16 12:51:55,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 313 transitions. [2022-11-16 12:51:55,284 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9098837209302325 [2022-11-16 12:51:55,284 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 313 transitions. [2022-11-16 12:51:55,284 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 313 transitions. [2022-11-16 12:51:55,284 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:51:55,284 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 313 transitions. [2022-11-16 12:51:55,286 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 156.5) internal successors, (313), 2 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:51:55,287 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 172.0) internal successors, (516), 3 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:51:55,288 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 172.0) internal successors, (516), 3 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:51:55,288 INFO L175 Difference]: Start difference. First operand has 153 places, 172 transitions, 374 flow. Second operand 2 states and 313 transitions. [2022-11-16 12:51:55,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 148 transitions, 338 flow [2022-11-16 12:51:55,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 148 transitions, 338 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-16 12:51:55,293 INFO L231 Difference]: Finished difference. Result has 153 places, 126 transitions, 273 flow [2022-11-16 12:51:55,294 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=326, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=273, PETRI_PLACES=153, PETRI_TRANSITIONS=126} [2022-11-16 12:51:55,296 INFO L288 CegarLoopForPetriNet]: 153 programPoint places, 0 predicate places. [2022-11-16 12:51:55,296 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 126 transitions, 273 flow [2022-11-16 12:51:55,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 142.5) internal successors, (285), 2 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:51:55,297 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:51:55,297 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:51:55,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-16 12:51:55,297 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:51:55,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:51:55,298 INFO L85 PathProgramCache]: Analyzing trace with hash 1594598493, now seen corresponding path program 1 times [2022-11-16 12:51:55,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:51:55,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888980311] [2022-11-16 12:51:55,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:51:55,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:51:55,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:51:55,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:51:55,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:51:55,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888980311] [2022-11-16 12:51:55,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888980311] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:51:55,375 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:51:55,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:51:55,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320650207] [2022-11-16 12:51:55,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:51:55,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:51:55,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:51:55,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:51:55,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:51:55,378 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 172 [2022-11-16 12:51:55,378 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 126 transitions, 273 flow. Second operand has 3 states, 3 states have (on average 136.0) internal successors, (408), 3 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:51:55,378 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:51:55,379 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 172 [2022-11-16 12:51:55,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:51:55,448 INFO L130 PetriNetUnfolder]: 0/170 cut-off events. [2022-11-16 12:51:55,449 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-16 12:51:55,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 210 conditions, 170 events. 0/170 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 330 event pairs, 0 based on Foata normal form. 0/167 useless extension candidates. Maximal degree in co-relation 0. Up to 18 conditions per place. [2022-11-16 12:51:55,450 INFO L137 encePairwiseOnDemand]: 169/172 looper letters, 12 selfloop transitions, 2 changer transitions 0/130 dead transitions. [2022-11-16 12:51:55,450 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 130 transitions, 309 flow [2022-11-16 12:51:55,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:51:55,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-16 12:51:55,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 420 transitions. [2022-11-16 12:51:55,452 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.813953488372093 [2022-11-16 12:51:55,452 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 420 transitions. [2022-11-16 12:51:55,453 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 420 transitions. [2022-11-16 12:51:55,453 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:51:55,453 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 420 transitions. [2022-11-16 12:51:55,454 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 140.0) internal successors, (420), 3 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:51:55,456 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 172.0) internal successors, (688), 4 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:51:55,458 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 172.0) internal successors, (688), 4 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:51:55,458 INFO L175 Difference]: Start difference. First operand has 153 places, 126 transitions, 273 flow. Second operand 3 states and 420 transitions. [2022-11-16 12:51:55,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 130 transitions, 309 flow [2022-11-16 12:51:55,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 130 transitions, 303 flow, removed 3 selfloop flow, removed 0 redundant places. [2022-11-16 12:51:55,462 INFO L231 Difference]: Finished difference. Result has 137 places, 127 transitions, 279 flow [2022-11-16 12:51:55,463 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=267, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=279, PETRI_PLACES=137, PETRI_TRANSITIONS=127} [2022-11-16 12:51:55,466 INFO L288 CegarLoopForPetriNet]: 153 programPoint places, -16 predicate places. [2022-11-16 12:51:55,466 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 127 transitions, 279 flow [2022-11-16 12:51:55,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 136.0) internal successors, (408), 3 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:51:55,467 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:51:55,467 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:51:55,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-16 12:51:55,468 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:51:55,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:51:55,468 INFO L85 PathProgramCache]: Analyzing trace with hash -943593217, now seen corresponding path program 1 times [2022-11-16 12:51:55,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:51:55,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413331082] [2022-11-16 12:51:55,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:51:55,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:51:55,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:51:55,605 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:51:55,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:51:55,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413331082] [2022-11-16 12:51:55,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413331082] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:51:55,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034619815] [2022-11-16 12:51:55,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:51:55,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:51:55,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e030e482-91d5-4850-8729-5625e4fd164e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:51:55,607 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e030e482-91d5-4850-8729-5625e4fd164e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:51:55,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e030e482-91d5-4850-8729-5625e4fd164e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 12:51:55,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:51:55,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 12:51:55,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:51:55,758 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:51:55,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:51:55,811 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:51:55,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034619815] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:51:55,812 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:51:55,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-16 12:51:55,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915647877] [2022-11-16 12:51:55,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:51:55,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 12:51:55,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:51:55,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 12:51:55,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:51:55,817 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 172 [2022-11-16 12:51:55,819 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 127 transitions, 279 flow. Second operand has 10 states, 10 states have (on average 136.3) internal successors, (1363), 10 states have internal predecessors, (1363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:51:55,819 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:51:55,819 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 172 [2022-11-16 12:51:55,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:51:55,957 INFO L130 PetriNetUnfolder]: 0/148 cut-off events. [2022-11-16 12:51:55,957 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-11-16 12:51:55,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 194 conditions, 148 events. 0/148 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 203 event pairs, 0 based on Foata normal form. 2/150 useless extension candidates. Maximal degree in co-relation 0. Up to 7 conditions per place. [2022-11-16 12:51:55,958 INFO L137 encePairwiseOnDemand]: 166/172 looper letters, 13 selfloop transitions, 9 changer transitions 0/137 dead transitions. [2022-11-16 12:51:55,958 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 137 transitions, 345 flow [2022-11-16 12:51:55,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:51:55,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-16 12:51:55,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1230 transitions. [2022-11-16 12:51:55,962 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7945736434108527 [2022-11-16 12:51:55,962 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1230 transitions. [2022-11-16 12:51:55,962 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1230 transitions. [2022-11-16 12:51:55,963 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:51:55,963 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1230 transitions. [2022-11-16 12:51:55,966 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 136.66666666666666) internal successors, (1230), 9 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:51:55,969 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 172.0) internal successors, (1720), 10 states have internal predecessors, (1720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:51:55,970 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 172.0) internal successors, (1720), 10 states have internal predecessors, (1720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:51:55,970 INFO L175 Difference]: Start difference. First operand has 137 places, 127 transitions, 279 flow. Second operand 9 states and 1230 transitions. [2022-11-16 12:51:55,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 137 transitions, 345 flow [2022-11-16 12:51:55,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 137 transitions, 343 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-16 12:51:55,975 INFO L231 Difference]: Finished difference. Result has 147 places, 133 transitions, 327 flow [2022-11-16 12:51:55,976 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=277, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=327, PETRI_PLACES=147, PETRI_TRANSITIONS=133} [2022-11-16 12:51:55,978 INFO L288 CegarLoopForPetriNet]: 153 programPoint places, -6 predicate places. [2022-11-16 12:51:55,979 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 133 transitions, 327 flow [2022-11-16 12:51:55,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 136.3) internal successors, (1363), 10 states have internal predecessors, (1363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:51:55,979 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:51:55,980 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:51:55,989 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e030e482-91d5-4850-8729-5625e4fd164e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-16 12:51:56,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e030e482-91d5-4850-8729-5625e4fd164e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-16 12:51:56,185 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:51:56,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:51:56,185 INFO L85 PathProgramCache]: Analyzing trace with hash 1659738377, now seen corresponding path program 1 times [2022-11-16 12:51:56,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:51:56,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136825323] [2022-11-16 12:51:56,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:51:56,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:51:56,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:51:56,205 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-16 12:51:56,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:51:56,226 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-16 12:51:56,226 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-16 12:51:56,226 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-16 12:51:56,227 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-16 12:51:56,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-16 12:51:56,227 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-11-16 12:51:56,228 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-16 12:51:56,228 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-11-16 12:51:56,251 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-11-16 12:51:56,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 178 places, 202 transitions, 448 flow [2022-11-16 12:51:56,373 INFO L130 PetriNetUnfolder]: 81/555 cut-off events. [2022-11-16 12:51:56,374 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-11-16 12:51:56,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 610 conditions, 555 events. 81/555 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2068 event pairs, 6 based on Foata normal form. 0/469 useless extension candidates. Maximal degree in co-relation 383. Up to 32 conditions per place. [2022-11-16 12:51:56,381 INFO L82 GeneralOperation]: Start removeDead. Operand has 178 places, 202 transitions, 448 flow [2022-11-16 12:51:56,387 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 178 places, 202 transitions, 448 flow [2022-11-16 12:51:56,388 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 12:51:56,388 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;@102a40f3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 12:51:56,389 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-16 12:51:56,398 INFO L130 PetriNetUnfolder]: 3/77 cut-off events. [2022-11-16 12:51:56,398 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-16 12:51:56,399 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:51:56,399 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:51:56,399 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:51:56,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:51:56,399 INFO L85 PathProgramCache]: Analyzing trace with hash -2105846362, now seen corresponding path program 1 times [2022-11-16 12:51:56,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:51:56,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485650559] [2022-11-16 12:51:56,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:51:56,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:51:56,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:51:56,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:51:56,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:51:56,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485650559] [2022-11-16 12:51:56,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485650559] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:51:56,426 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:51:56,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:51:56,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740020434] [2022-11-16 12:51:56,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:51:56,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 12:51:56,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:51:56,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 12:51:56,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 12:51:56,428 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 202 [2022-11-16 12:51:56,429 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 202 transitions, 448 flow. Second operand has 2 states, 2 states have (on average 164.5) internal successors, (329), 2 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:51:56,429 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:51:56,429 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 202 [2022-11-16 12:51:56,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:51:56,536 INFO L130 PetriNetUnfolder]: 21/490 cut-off events. [2022-11-16 12:51:56,536 INFO L131 PetriNetUnfolder]: For 130/152 co-relation queries the response was YES. [2022-11-16 12:51:56,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 582 conditions, 490 events. 21/490 cut-off events. For 130/152 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1888 event pairs, 6 based on Foata normal form. 252/716 useless extension candidates. Maximal degree in co-relation 352. Up to 37 conditions per place. [2022-11-16 12:51:56,541 INFO L137 encePairwiseOnDemand]: 173/202 looper letters, 4 selfloop transitions, 0 changer transitions 23/172 dead transitions. [2022-11-16 12:51:56,541 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 172 transitions, 404 flow [2022-11-16 12:51:56,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 12:51:56,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-16 12:51:56,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 365 transitions. [2022-11-16 12:51:56,543 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9034653465346535 [2022-11-16 12:51:56,543 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 365 transitions. [2022-11-16 12:51:56,543 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 365 transitions. [2022-11-16 12:51:56,543 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:51:56,543 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 365 transitions. [2022-11-16 12:51:56,544 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 182.5) internal successors, (365), 2 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:51:56,545 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 202.0) internal successors, (606), 3 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:51:56,545 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 202.0) internal successors, (606), 3 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:51:56,546 INFO L175 Difference]: Start difference. First operand has 178 places, 202 transitions, 448 flow. Second operand 2 states and 365 transitions. [2022-11-16 12:51:56,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 172 transitions, 404 flow [2022-11-16 12:51:56,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 172 transitions, 404 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-16 12:51:56,550 INFO L231 Difference]: Finished difference. Result has 178 places, 149 transitions, 330 flow [2022-11-16 12:51:56,550 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=202, PETRI_DIFFERENCE_MINUEND_FLOW=388, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=330, PETRI_PLACES=178, PETRI_TRANSITIONS=149} [2022-11-16 12:51:56,551 INFO L288 CegarLoopForPetriNet]: 178 programPoint places, 0 predicate places. [2022-11-16 12:51:56,551 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 149 transitions, 330 flow [2022-11-16 12:51:56,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 164.5) internal successors, (329), 2 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:51:56,551 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:51:56,551 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:51:56,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-16 12:51:56,552 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:51:56,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:51:56,552 INFO L85 PathProgramCache]: Analyzing trace with hash 392169575, now seen corresponding path program 1 times [2022-11-16 12:51:56,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:51:56,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972209004] [2022-11-16 12:51:56,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:51:56,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:51:56,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:51:56,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:51:56,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:51:56,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972209004] [2022-11-16 12:51:56,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972209004] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:51:56,588 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:51:56,588 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:51:56,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266582715] [2022-11-16 12:51:56,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:51:56,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:51:56,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:51:56,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:51:56,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:51:56,590 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 202 [2022-11-16 12:51:56,591 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 149 transitions, 330 flow. Second operand has 3 states, 3 states have (on average 158.0) internal successors, (474), 3 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:51:56,591 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:51:56,591 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 202 [2022-11-16 12:51:56,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:51:56,665 INFO L130 PetriNetUnfolder]: 0/213 cut-off events. [2022-11-16 12:51:56,665 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-11-16 12:51:56,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 266 conditions, 213 events. 0/213 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 469 event pairs, 0 based on Foata normal form. 0/209 useless extension candidates. Maximal degree in co-relation 0. Up to 24 conditions per place. [2022-11-16 12:51:56,666 INFO L137 encePairwiseOnDemand]: 199/202 looper letters, 13 selfloop transitions, 2 changer transitions 0/153 dead transitions. [2022-11-16 12:51:56,666 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 153 transitions, 368 flow [2022-11-16 12:51:56,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:51:56,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-16 12:51:56,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 487 transitions. [2022-11-16 12:51:56,669 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8036303630363036 [2022-11-16 12:51:56,669 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 487 transitions. [2022-11-16 12:51:56,669 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 487 transitions. [2022-11-16 12:51:56,669 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:51:56,670 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 487 transitions. [2022-11-16 12:51:56,671 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 162.33333333333334) internal successors, (487), 3 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:51:56,672 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 202.0) internal successors, (808), 4 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:51:56,673 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 202.0) internal successors, (808), 4 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:51:56,673 INFO L175 Difference]: Start difference. First operand has 178 places, 149 transitions, 330 flow. Second operand 3 states and 487 transitions. [2022-11-16 12:51:56,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 153 transitions, 368 flow [2022-11-16 12:51:56,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 153 transitions, 356 flow, removed 6 selfloop flow, removed 0 redundant places. [2022-11-16 12:51:56,678 INFO L231 Difference]: Finished difference. Result has 162 places, 150 transitions, 330 flow [2022-11-16 12:51:56,679 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=202, PETRI_DIFFERENCE_MINUEND_FLOW=318, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=330, PETRI_PLACES=162, PETRI_TRANSITIONS=150} [2022-11-16 12:51:56,680 INFO L288 CegarLoopForPetriNet]: 178 programPoint places, -16 predicate places. [2022-11-16 12:51:56,680 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 150 transitions, 330 flow [2022-11-16 12:51:56,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 158.0) internal successors, (474), 3 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:51:56,680 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:51:56,681 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:51:56,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-16 12:51:56,681 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:51:56,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:51:56,682 INFO L85 PathProgramCache]: Analyzing trace with hash -102240539, now seen corresponding path program 1 times [2022-11-16 12:51:56,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:51:56,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860960761] [2022-11-16 12:51:56,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:51:56,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:51:56,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:51:56,798 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:51:56,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:51:56,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860960761] [2022-11-16 12:51:56,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860960761] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:51:56,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018500698] [2022-11-16 12:51:56,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:51:56,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:51:56,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e030e482-91d5-4850-8729-5625e4fd164e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:51:56,800 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e030e482-91d5-4850-8729-5625e4fd164e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:51:56,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e030e482-91d5-4850-8729-5625e4fd164e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 12:51:56,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:51:56,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 12:51:56,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:51:56,947 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:51:56,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:51:56,988 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:51:56,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018500698] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:51:56,989 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:51:56,989 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-16 12:51:56,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681842538] [2022-11-16 12:51:56,989 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:51:56,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 12:51:56,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:51:56,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 12:51:56,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:51:56,992 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 202 [2022-11-16 12:51:56,994 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 150 transitions, 330 flow. Second operand has 10 states, 10 states have (on average 158.3) internal successors, (1583), 10 states have internal predecessors, (1583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:51:56,995 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:51:56,995 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 202 [2022-11-16 12:51:56,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:51:57,096 INFO L130 PetriNetUnfolder]: 0/191 cut-off events. [2022-11-16 12:51:57,096 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-11-16 12:51:57,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 250 conditions, 191 events. 0/191 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 345 event pairs, 0 based on Foata normal form. 2/193 useless extension candidates. Maximal degree in co-relation 0. Up to 11 conditions per place. [2022-11-16 12:51:57,097 INFO L137 encePairwiseOnDemand]: 196/202 looper letters, 14 selfloop transitions, 9 changer transitions 0/160 dead transitions. [2022-11-16 12:51:57,098 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 160 transitions, 398 flow [2022-11-16 12:51:57,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:51:57,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-16 12:51:57,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1429 transitions. [2022-11-16 12:51:57,101 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.786028602860286 [2022-11-16 12:51:57,102 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1429 transitions. [2022-11-16 12:51:57,102 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1429 transitions. [2022-11-16 12:51:57,103 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:51:57,103 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1429 transitions. [2022-11-16 12:51:57,107 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 158.77777777777777) internal successors, (1429), 9 states have internal predecessors, (1429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:51:57,110 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 202.0) internal successors, (2020), 10 states have internal predecessors, (2020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:51:57,111 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 202.0) internal successors, (2020), 10 states have internal predecessors, (2020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:51:57,112 INFO L175 Difference]: Start difference. First operand has 162 places, 150 transitions, 330 flow. Second operand 9 states and 1429 transitions. [2022-11-16 12:51:57,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 160 transitions, 398 flow [2022-11-16 12:51:57,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 160 transitions, 396 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-16 12:51:57,116 INFO L231 Difference]: Finished difference. Result has 172 places, 156 transitions, 378 flow [2022-11-16 12:51:57,117 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=202, PETRI_DIFFERENCE_MINUEND_FLOW=328, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=378, PETRI_PLACES=172, PETRI_TRANSITIONS=156} [2022-11-16 12:51:57,117 INFO L288 CegarLoopForPetriNet]: 178 programPoint places, -6 predicate places. [2022-11-16 12:51:57,117 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 156 transitions, 378 flow [2022-11-16 12:51:57,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 158.3) internal successors, (1583), 10 states have internal predecessors, (1583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:51:57,119 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:51:57,119 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:51:57,128 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e030e482-91d5-4850-8729-5625e4fd164e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-16 12:51:57,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e030e482-91d5-4850-8729-5625e4fd164e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:51:57,325 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:51:57,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:51:57,326 INFO L85 PathProgramCache]: Analyzing trace with hash 878630948, now seen corresponding path program 1 times [2022-11-16 12:51:57,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:51:57,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395304882] [2022-11-16 12:51:57,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:51:57,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:51:57,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:51:57,494 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-16 12:51:57,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:51:57,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395304882] [2022-11-16 12:51:57,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395304882] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:51:57,495 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:51:57,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 12:51:57,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40078300] [2022-11-16 12:51:57,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:51:57,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 12:51:57,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:51:57,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 12:51:57,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:51:57,499 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 202 [2022-11-16 12:51:57,499 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 156 transitions, 378 flow. Second operand has 5 states, 5 states have (on average 143.6) internal successors, (718), 5 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:51:57,500 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:51:57,500 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 202 [2022-11-16 12:51:57,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:52:04,807 INFO L130 PetriNetUnfolder]: 16742/41403 cut-off events. [2022-11-16 12:52:04,807 INFO L131 PetriNetUnfolder]: For 555/555 co-relation queries the response was YES. [2022-11-16 12:52:05,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64820 conditions, 41403 events. 16742/41403 cut-off events. For 555/555 co-relation queries the response was YES. Maximal size of possible extension queue 1767. Compared 493702 event pairs, 10951 based on Foata normal form. 750/41592 useless extension candidates. Maximal degree in co-relation 64809. Up to 14189 conditions per place. [2022-11-16 12:52:05,330 INFO L137 encePairwiseOnDemand]: 194/202 looper letters, 31 selfloop transitions, 5 changer transitions 53/220 dead transitions. [2022-11-16 12:52:05,330 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 220 transitions, 699 flow [2022-11-16 12:52:05,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 12:52:05,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-16 12:52:05,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1085 transitions. [2022-11-16 12:52:05,333 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7673267326732673 [2022-11-16 12:52:05,334 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1085 transitions. [2022-11-16 12:52:05,334 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1085 transitions. [2022-11-16 12:52:05,335 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:52:05,335 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1085 transitions. [2022-11-16 12:52:05,337 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 155.0) internal successors, (1085), 7 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:05,340 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 202.0) internal successors, (1616), 8 states have internal predecessors, (1616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:05,340 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 202.0) internal successors, (1616), 8 states have internal predecessors, (1616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:05,341 INFO L175 Difference]: Start difference. First operand has 172 places, 156 transitions, 378 flow. Second operand 7 states and 1085 transitions. [2022-11-16 12:52:05,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 220 transitions, 699 flow [2022-11-16 12:52:05,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 220 transitions, 693 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-11-16 12:52:05,347 INFO L231 Difference]: Finished difference. Result has 182 places, 160 transitions, 429 flow [2022-11-16 12:52:05,348 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=202, PETRI_DIFFERENCE_MINUEND_FLOW=372, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=429, PETRI_PLACES=182, PETRI_TRANSITIONS=160} [2022-11-16 12:52:05,349 INFO L288 CegarLoopForPetriNet]: 178 programPoint places, 4 predicate places. [2022-11-16 12:52:05,349 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 160 transitions, 429 flow [2022-11-16 12:52:05,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 143.6) internal successors, (718), 5 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:05,350 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:52:05,350 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:52:05,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-16 12:52:05,350 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:52:05,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:52:05,351 INFO L85 PathProgramCache]: Analyzing trace with hash 99228036, now seen corresponding path program 1 times [2022-11-16 12:52:05,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:52:05,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901187147] [2022-11-16 12:52:05,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:52:05,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:52:05,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:52:05,379 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-16 12:52:05,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:52:05,425 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-16 12:52:05,430 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-16 12:52:05,430 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-16 12:52:05,430 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-16 12:52:05,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-16 12:52:05,431 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-11-16 12:52:05,432 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-16 12:52:05,432 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-11-16 12:52:05,468 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2022-11-16 12:52:05,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 203 places, 232 transitions, 524 flow [2022-11-16 12:52:05,615 INFO L130 PetriNetUnfolder]: 140/887 cut-off events. [2022-11-16 12:52:05,615 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2022-11-16 12:52:05,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 998 conditions, 887 events. 140/887 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 3916 event pairs, 23 based on Foata normal form. 0/757 useless extension candidates. Maximal degree in co-relation 600. Up to 80 conditions per place. [2022-11-16 12:52:05,629 INFO L82 GeneralOperation]: Start removeDead. Operand has 203 places, 232 transitions, 524 flow [2022-11-16 12:52:05,637 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 203 places, 232 transitions, 524 flow [2022-11-16 12:52:05,638 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 12:52:05,639 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;@102a40f3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 12:52:05,639 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-16 12:52:05,645 INFO L130 PetriNetUnfolder]: 3/77 cut-off events. [2022-11-16 12:52:05,645 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-16 12:52:05,645 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:52:05,646 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:52:05,646 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:52:05,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:52:05,646 INFO L85 PathProgramCache]: Analyzing trace with hash 1956273038, now seen corresponding path program 1 times [2022-11-16 12:52:05,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:52:05,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076347649] [2022-11-16 12:52:05,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:52:05,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:52:05,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:52:05,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:52:05,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:52:05,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076347649] [2022-11-16 12:52:05,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076347649] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:52:05,670 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:52:05,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:52:05,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174270292] [2022-11-16 12:52:05,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:52:05,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 12:52:05,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:52:05,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 12:52:05,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 12:52:05,673 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 232 [2022-11-16 12:52:05,674 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 232 transitions, 524 flow. Second operand has 2 states, 2 states have (on average 186.5) internal successors, (373), 2 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:05,674 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:52:05,674 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 232 [2022-11-16 12:52:05,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:52:05,847 INFO L130 PetriNetUnfolder]: 54/795 cut-off events. [2022-11-16 12:52:05,847 INFO L131 PetriNetUnfolder]: For 295/325 co-relation queries the response was YES. [2022-11-16 12:52:05,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 992 conditions, 795 events. 54/795 cut-off events. For 295/325 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 3692 event pairs, 23 based on Foata normal form. 580/1331 useless extension candidates. Maximal degree in co-relation 571. Up to 86 conditions per place. [2022-11-16 12:52:05,855 INFO L137 encePairwiseOnDemand]: 197/232 looper letters, 5 selfloop transitions, 0 changer transitions 24/196 dead transitions. [2022-11-16 12:52:05,855 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 196 transitions, 472 flow [2022-11-16 12:52:05,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 12:52:05,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-16 12:52:05,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 417 transitions. [2022-11-16 12:52:05,857 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8987068965517241 [2022-11-16 12:52:05,857 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 417 transitions. [2022-11-16 12:52:05,857 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 417 transitions. [2022-11-16 12:52:05,857 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:52:05,858 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 417 transitions. [2022-11-16 12:52:05,859 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 208.5) internal successors, (417), 2 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:05,860 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 232.0) internal successors, (696), 3 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:05,860 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 232.0) internal successors, (696), 3 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:05,860 INFO L175 Difference]: Start difference. First operand has 203 places, 232 transitions, 524 flow. Second operand 2 states and 417 transitions. [2022-11-16 12:52:05,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 196 transitions, 472 flow [2022-11-16 12:52:05,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 196 transitions, 472 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-16 12:52:05,866 INFO L231 Difference]: Finished difference. Result has 203 places, 172 transitions, 389 flow [2022-11-16 12:52:05,866 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=232, PETRI_DIFFERENCE_MINUEND_FLOW=452, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=389, PETRI_PLACES=203, PETRI_TRANSITIONS=172} [2022-11-16 12:52:05,867 INFO L288 CegarLoopForPetriNet]: 203 programPoint places, 0 predicate places. [2022-11-16 12:52:05,867 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 172 transitions, 389 flow [2022-11-16 12:52:05,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 186.5) internal successors, (373), 2 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:05,868 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:52:05,868 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:52:05,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-16 12:52:05,869 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:52:05,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:52:05,869 INFO L85 PathProgramCache]: Analyzing trace with hash 159321679, now seen corresponding path program 1 times [2022-11-16 12:52:05,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:52:05,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993616149] [2022-11-16 12:52:05,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:52:05,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:52:05,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:52:05,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:52:05,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:52:05,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993616149] [2022-11-16 12:52:05,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993616149] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:52:05,909 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:52:05,909 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:52:05,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95501945] [2022-11-16 12:52:05,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:52:05,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:52:05,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:52:05,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:52:05,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:52:05,911 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 232 [2022-11-16 12:52:05,912 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 172 transitions, 389 flow. Second operand has 3 states, 3 states have (on average 180.0) internal successors, (540), 3 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:05,912 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:52:05,912 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 232 [2022-11-16 12:52:05,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:52:05,975 INFO L130 PetriNetUnfolder]: 0/256 cut-off events. [2022-11-16 12:52:05,975 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-11-16 12:52:05,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 323 conditions, 256 events. 0/256 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 616 event pairs, 0 based on Foata normal form. 0/251 useless extension candidates. Maximal degree in co-relation 0. Up to 30 conditions per place. [2022-11-16 12:52:05,976 INFO L137 encePairwiseOnDemand]: 229/232 looper letters, 14 selfloop transitions, 2 changer transitions 0/176 dead transitions. [2022-11-16 12:52:05,976 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 176 transitions, 429 flow [2022-11-16 12:52:05,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:52:05,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-16 12:52:05,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 554 transitions. [2022-11-16 12:52:05,978 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7959770114942529 [2022-11-16 12:52:05,979 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 554 transitions. [2022-11-16 12:52:05,979 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 554 transitions. [2022-11-16 12:52:05,979 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:52:05,979 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 554 transitions. [2022-11-16 12:52:05,980 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 184.66666666666666) internal successors, (554), 3 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:05,982 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 232.0) internal successors, (928), 4 states have internal predecessors, (928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:05,982 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 232.0) internal successors, (928), 4 states have internal predecessors, (928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:05,983 INFO L175 Difference]: Start difference. First operand has 203 places, 172 transitions, 389 flow. Second operand 3 states and 554 transitions. [2022-11-16 12:52:05,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 176 transitions, 429 flow [2022-11-16 12:52:05,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 176 transitions, 409 flow, removed 10 selfloop flow, removed 0 redundant places. [2022-11-16 12:52:05,986 INFO L231 Difference]: Finished difference. Result has 187 places, 173 transitions, 381 flow [2022-11-16 12:52:05,987 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=232, PETRI_DIFFERENCE_MINUEND_FLOW=369, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=381, PETRI_PLACES=187, PETRI_TRANSITIONS=173} [2022-11-16 12:52:05,987 INFO L288 CegarLoopForPetriNet]: 203 programPoint places, -16 predicate places. [2022-11-16 12:52:05,987 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 173 transitions, 381 flow [2022-11-16 12:52:05,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 180.0) internal successors, (540), 3 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:05,988 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:52:05,988 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:52:05,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-16 12:52:05,989 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:52:05,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:52:05,989 INFO L85 PathProgramCache]: Analyzing trace with hash -1191506967, now seen corresponding path program 1 times [2022-11-16 12:52:05,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:52:05,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267871831] [2022-11-16 12:52:05,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:52:05,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:52:06,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:52:06,070 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:52:06,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:52:06,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267871831] [2022-11-16 12:52:06,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267871831] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:52:06,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929546385] [2022-11-16 12:52:06,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:52:06,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:52:06,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e030e482-91d5-4850-8729-5625e4fd164e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:52:06,073 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e030e482-91d5-4850-8729-5625e4fd164e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:52:06,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e030e482-91d5-4850-8729-5625e4fd164e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 12:52:06,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:52:06,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 12:52:06,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:52:06,235 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:52:06,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:52:06,280 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:52:06,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929546385] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:52:06,281 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:52:06,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-16 12:52:06,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703732299] [2022-11-16 12:52:06,282 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:52:06,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 12:52:06,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:52:06,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 12:52:06,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:52:06,285 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 232 [2022-11-16 12:52:06,288 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 173 transitions, 381 flow. Second operand has 10 states, 10 states have (on average 180.3) internal successors, (1803), 10 states have internal predecessors, (1803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:06,288 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:52:06,288 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 232 [2022-11-16 12:52:06,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:52:06,497 INFO L130 PetriNetUnfolder]: 0/234 cut-off events. [2022-11-16 12:52:06,498 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-16 12:52:06,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 306 conditions, 234 events. 0/234 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 486 event pairs, 0 based on Foata normal form. 2/236 useless extension candidates. Maximal degree in co-relation 0. Up to 15 conditions per place. [2022-11-16 12:52:06,499 INFO L137 encePairwiseOnDemand]: 226/232 looper letters, 15 selfloop transitions, 9 changer transitions 0/183 dead transitions. [2022-11-16 12:52:06,499 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 183 transitions, 451 flow [2022-11-16 12:52:06,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:52:06,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-16 12:52:06,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1628 transitions. [2022-11-16 12:52:06,503 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7796934865900383 [2022-11-16 12:52:06,504 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1628 transitions. [2022-11-16 12:52:06,504 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1628 transitions. [2022-11-16 12:52:06,505 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:52:06,505 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1628 transitions. [2022-11-16 12:52:06,508 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 180.88888888888889) internal successors, (1628), 9 states have internal predecessors, (1628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:06,512 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 232.0) internal successors, (2320), 10 states have internal predecessors, (2320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:06,514 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 232.0) internal successors, (2320), 10 states have internal predecessors, (2320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:06,514 INFO L175 Difference]: Start difference. First operand has 187 places, 173 transitions, 381 flow. Second operand 9 states and 1628 transitions. [2022-11-16 12:52:06,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 183 transitions, 451 flow [2022-11-16 12:52:06,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 183 transitions, 449 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-16 12:52:06,519 INFO L231 Difference]: Finished difference. Result has 197 places, 179 transitions, 429 flow [2022-11-16 12:52:06,520 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=232, PETRI_DIFFERENCE_MINUEND_FLOW=379, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=429, PETRI_PLACES=197, PETRI_TRANSITIONS=179} [2022-11-16 12:52:06,521 INFO L288 CegarLoopForPetriNet]: 203 programPoint places, -6 predicate places. [2022-11-16 12:52:06,521 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 179 transitions, 429 flow [2022-11-16 12:52:06,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 180.3) internal successors, (1803), 10 states have internal predecessors, (1803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:06,522 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:52:06,523 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:52:06,529 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e030e482-91d5-4850-8729-5625e4fd164e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 12:52:06,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e030e482-91d5-4850-8729-5625e4fd164e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:52:06,728 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:52:06,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:52:06,728 INFO L85 PathProgramCache]: Analyzing trace with hash -566867360, now seen corresponding path program 1 times [2022-11-16 12:52:06,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:52:06,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033177414] [2022-11-16 12:52:06,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:52:06,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:52:06,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:52:06,891 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-16 12:52:06,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:52:06,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033177414] [2022-11-16 12:52:06,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033177414] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:52:06,892 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:52:06,892 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 12:52:06,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458088629] [2022-11-16 12:52:06,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:52:06,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 12:52:06,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:52:06,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 12:52:06,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:52:06,894 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 232 [2022-11-16 12:52:06,896 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 179 transitions, 429 flow. Second operand has 5 states, 5 states have (on average 161.6) internal successors, (808), 5 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:06,897 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:52:06,897 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 232 [2022-11-16 12:52:06,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand