./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/stack-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0af28c61-9fd8-4313-ab70-167af9311caa/bin/uautomizer-J5u9QxTXDZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0af28c61-9fd8-4313-ab70-167af9311caa/bin/uautomizer-J5u9QxTXDZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0af28c61-9fd8-4313-ab70-167af9311caa/bin/uautomizer-J5u9QxTXDZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0af28c61-9fd8-4313-ab70-167af9311caa/bin/uautomizer-J5u9QxTXDZ/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/stack-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0af28c61-9fd8-4313-ab70-167af9311caa/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0af28c61-9fd8-4313-ab70-167af9311caa/bin/uautomizer-J5u9QxTXDZ --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 1c5d098180a5596f0a60d3177354c69a5ee6da68b8191dc75b6c33b291ef0421 --- 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-dbf71c6-m [2022-10-17 10:10:14,265 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 10:10:14,267 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 10:10:14,300 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 10:10:14,300 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 10:10:14,302 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 10:10:14,304 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 10:10:14,306 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 10:10:14,308 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 10:10:14,310 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 10:10:14,311 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 10:10:14,313 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 10:10:14,313 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 10:10:14,315 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 10:10:14,316 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 10:10:14,318 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 10:10:14,319 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 10:10:14,320 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 10:10:14,323 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 10:10:14,326 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 10:10:14,328 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 10:10:14,329 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 10:10:14,331 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 10:10:14,332 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 10:10:14,338 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 10:10:14,338 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 10:10:14,339 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 10:10:14,340 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 10:10:14,341 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 10:10:14,342 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 10:10:14,343 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 10:10:14,344 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 10:10:14,345 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 10:10:14,346 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 10:10:14,347 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 10:10:14,347 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 10:10:14,348 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 10:10:14,349 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 10:10:14,349 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 10:10:14,351 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 10:10:14,351 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 10:10:14,353 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0af28c61-9fd8-4313-ab70-167af9311caa/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-10-17 10:10:14,380 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 10:10:14,381 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 10:10:14,381 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 10:10:14,382 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 10:10:14,382 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 10:10:14,383 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 10:10:14,384 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-17 10:10:14,384 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-17 10:10:14,384 INFO L138 SettingsManager]: * Use SBE=true [2022-10-17 10:10:14,385 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 10:10:14,385 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 10:10:14,385 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 10:10:14,386 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 10:10:14,386 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 10:10:14,386 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 10:10:14,386 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 10:10:14,387 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 10:10:14,387 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 10:10:14,387 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 10:10:14,388 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 10:10:14,388 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 10:10:14,388 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 10:10:14,389 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-17 10:10:14,389 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 10:10:14,389 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:10:14,390 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 10:10:14,390 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 10:10:14,390 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 10:10:14,391 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-17 10:10:14,391 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 10:10:14,391 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-10-17 10:10:14,392 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-10-17 10:10:14,392 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 10:10:14,392 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_0af28c61-9fd8-4313-ab70-167af9311caa/bin/uautomizer-J5u9QxTXDZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0af28c61-9fd8-4313-ab70-167af9311caa/bin/uautomizer-J5u9QxTXDZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1c5d098180a5596f0a60d3177354c69a5ee6da68b8191dc75b6c33b291ef0421 [2022-10-17 10:10:14,638 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 10:10:14,662 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 10:10:14,665 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 10:10:14,666 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 10:10:14,667 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 10:10:14,669 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0af28c61-9fd8-4313-ab70-167af9311caa/bin/uautomizer-J5u9QxTXDZ/../../sv-benchmarks/c/pthread/stack-2.i [2022-10-17 10:10:14,735 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0af28c61-9fd8-4313-ab70-167af9311caa/bin/uautomizer-J5u9QxTXDZ/data/684b7df4e/f8dc9e11280d4b949ba750deb0f0c569/FLAGb5a56b57a [2022-10-17 10:10:15,315 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 10:10:15,315 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0af28c61-9fd8-4313-ab70-167af9311caa/sv-benchmarks/c/pthread/stack-2.i [2022-10-17 10:10:15,333 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0af28c61-9fd8-4313-ab70-167af9311caa/bin/uautomizer-J5u9QxTXDZ/data/684b7df4e/f8dc9e11280d4b949ba750deb0f0c569/FLAGb5a56b57a [2022-10-17 10:10:15,588 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0af28c61-9fd8-4313-ab70-167af9311caa/bin/uautomizer-J5u9QxTXDZ/data/684b7df4e/f8dc9e11280d4b949ba750deb0f0c569 [2022-10-17 10:10:15,590 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 10:10:15,592 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 10:10:15,593 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 10:10:15,594 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 10:10:15,613 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 10:10:15,613 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:10:15" (1/1) ... [2022-10-17 10:10:15,614 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1dde994a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:10:15, skipping insertion in model container [2022-10-17 10:10:15,615 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:10:15" (1/1) ... [2022-10-17 10:10:15,622 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 10:10:15,669 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 10:10:16,114 WARN L230 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_0af28c61-9fd8-4313-ab70-167af9311caa/sv-benchmarks/c/pthread/stack-2.i[41520,41533] [2022-10-17 10:10:16,141 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:10:16,152 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 10:10:16,192 WARN L230 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_0af28c61-9fd8-4313-ab70-167af9311caa/sv-benchmarks/c/pthread/stack-2.i[41520,41533] [2022-10-17 10:10:16,208 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:10:16,301 INFO L208 MainTranslator]: Completed translation [2022-10-17 10:10:16,302 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:10:16 WrapperNode [2022-10-17 10:10:16,302 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 10:10:16,304 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 10:10:16,304 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 10:10:16,304 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 10:10:16,312 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:10:16" (1/1) ... [2022-10-17 10:10:16,345 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:10:16" (1/1) ... [2022-10-17 10:10:16,394 INFO L138 Inliner]: procedures = 277, calls = 46, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 161 [2022-10-17 10:10:16,395 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 10:10:16,396 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 10:10:16,396 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 10:10:16,396 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 10:10:16,405 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:10:16" (1/1) ... [2022-10-17 10:10:16,405 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:10:16" (1/1) ... [2022-10-17 10:10:16,424 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:10:16" (1/1) ... [2022-10-17 10:10:16,427 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:10:16" (1/1) ... [2022-10-17 10:10:16,435 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:10:16" (1/1) ... [2022-10-17 10:10:16,452 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:10:16" (1/1) ... [2022-10-17 10:10:16,455 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:10:16" (1/1) ... [2022-10-17 10:10:16,467 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:10:16" (1/1) ... [2022-10-17 10:10:16,471 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 10:10:16,471 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 10:10:16,472 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 10:10:16,472 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 10:10:16,473 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:10:16" (1/1) ... [2022-10-17 10:10:16,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:10:16,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0af28c61-9fd8-4313-ab70-167af9311caa/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:10:16,516 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0af28c61-9fd8-4313-ab70-167af9311caa/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 10:10:16,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0af28c61-9fd8-4313-ab70-167af9311caa/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 10:10:16,578 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-10-17 10:10:16,579 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-10-17 10:10:16,579 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-10-17 10:10:16,579 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-10-17 10:10:16,579 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-17 10:10:16,579 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-17 10:10:16,580 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-17 10:10:16,580 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-17 10:10:16,584 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-10-17 10:10:16,584 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 10:10:16,584 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 10:10:16,584 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 10:10:16,585 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 10:10:16,586 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-10-17 10:10:16,837 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 10:10:16,839 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 10:10:17,283 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 10:10:17,300 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 10:10:17,300 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-10-17 10:10:17,303 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:10:17 BoogieIcfgContainer [2022-10-17 10:10:17,303 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 10:10:17,309 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 10:10:17,309 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 10:10:17,313 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 10:10:17,313 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 10:10:15" (1/3) ... [2022-10-17 10:10:17,314 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@736e900a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:10:17, skipping insertion in model container [2022-10-17 10:10:17,315 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:10:16" (2/3) ... [2022-10-17 10:10:17,315 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@736e900a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:10:17, skipping insertion in model container [2022-10-17 10:10:17,315 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:10:17" (3/3) ... [2022-10-17 10:10:17,317 INFO L112 eAbstractionObserver]: Analyzing ICFG stack-2.i [2022-10-17 10:10:17,327 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-10-17 10:10:17,337 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 10:10:17,337 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-10-17 10:10:17,338 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-10-17 10:10:17,469 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-10-17 10:10:17,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 182 places, 185 transitions, 386 flow [2022-10-17 10:10:17,666 INFO L130 PetriNetUnfolder]: 10/183 cut-off events. [2022-10-17 10:10:17,666 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-10-17 10:10:17,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 192 conditions, 183 events. 10/183 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 436 event pairs, 0 based on Foata normal form. 0/171 useless extension candidates. Maximal degree in co-relation 135. Up to 3 conditions per place. [2022-10-17 10:10:17,675 INFO L82 GeneralOperation]: Start removeDead. Operand has 182 places, 185 transitions, 386 flow [2022-10-17 10:10:17,687 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 170 places, 173 transitions, 355 flow [2022-10-17 10:10:17,708 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 10:10:17,719 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;@5e9ef5e3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 10:10:17,719 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-10-17 10:10:17,752 INFO L130 PetriNetUnfolder]: 4/140 cut-off events. [2022-10-17 10:10:17,753 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-10-17 10:10:17,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:10:17,753 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:10:17,754 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-10-17 10:10:17,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:10:17,759 INFO L85 PathProgramCache]: Analyzing trace with hash 1631243722, now seen corresponding path program 1 times [2022-10-17 10:10:17,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:10:17,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873482980] [2022-10-17 10:10:17,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:10:17,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:10:17,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:10:18,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:10:18,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:10:18,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873482980] [2022-10-17 10:10:18,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873482980] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:10:18,260 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:10:18,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 10:10:18,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185496690] [2022-10-17 10:10:18,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:10:18,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 10:10:18,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:10:18,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 10:10:18,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 10:10:18,324 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 185 [2022-10-17 10:10:18,332 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 173 transitions, 355 flow. Second operand has 3 states, 3 states have (on average 165.0) internal successors, (495), 3 states have internal predecessors, (495), 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) [2022-10-17 10:10:18,332 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:10:18,332 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 185 [2022-10-17 10:10:18,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:10:18,586 INFO L130 PetriNetUnfolder]: 91/896 cut-off events. [2022-10-17 10:10:18,586 INFO L131 PetriNetUnfolder]: For 46/46 co-relation queries the response was YES. [2022-10-17 10:10:18,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1058 conditions, 896 events. 91/896 cut-off events. For 46/46 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 5328 event pairs, 15 based on Foata normal form. 61/885 useless extension candidates. Maximal degree in co-relation 903. Up to 96 conditions per place. [2022-10-17 10:10:18,599 INFO L137 encePairwiseOnDemand]: 176/185 looper letters, 19 selfloop transitions, 3 changer transitions 0/173 dead transitions. [2022-10-17 10:10:18,599 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 173 transitions, 405 flow [2022-10-17 10:10:18,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 10:10:18,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-10-17 10:10:18,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 524 transitions. [2022-10-17 10:10:18,617 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9441441441441442 [2022-10-17 10:10:18,618 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 524 transitions. [2022-10-17 10:10:18,618 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 524 transitions. [2022-10-17 10:10:18,621 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:10:18,623 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 524 transitions. [2022-10-17 10:10:18,628 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 174.66666666666666) internal successors, (524), 3 states have internal predecessors, (524), 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) [2022-10-17 10:10:18,635 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 185.0) internal successors, (740), 4 states have internal predecessors, (740), 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) [2022-10-17 10:10:18,636 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 185.0) internal successors, (740), 4 states have internal predecessors, (740), 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) [2022-10-17 10:10:18,638 INFO L175 Difference]: Start difference. First operand has 170 places, 173 transitions, 355 flow. Second operand 3 states and 524 transitions. [2022-10-17 10:10:18,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 173 transitions, 405 flow [2022-10-17 10:10:18,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 173 transitions, 397 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-10-17 10:10:18,649 INFO L231 Difference]: Finished difference. Result has 166 places, 166 transitions, 351 flow [2022-10-17 10:10:18,652 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=332, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=351, PETRI_PLACES=166, PETRI_TRANSITIONS=166} [2022-10-17 10:10:18,656 INFO L287 CegarLoopForPetriNet]: 170 programPoint places, -4 predicate places. [2022-10-17 10:10:18,656 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 166 transitions, 351 flow [2022-10-17 10:10:18,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 165.0) internal successors, (495), 3 states have internal predecessors, (495), 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) [2022-10-17 10:10:18,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:10:18,657 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:10:18,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 10:10:18,658 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-10-17 10:10:18,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:10:18,659 INFO L85 PathProgramCache]: Analyzing trace with hash -959432383, now seen corresponding path program 1 times [2022-10-17 10:10:18,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:10:18,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090859379] [2022-10-17 10:10:18,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:10:18,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:10:18,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:10:18,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:10:18,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:10:18,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090859379] [2022-10-17 10:10:18,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090859379] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:10:18,888 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:10:18,888 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 10:10:18,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856644839] [2022-10-17 10:10:18,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:10:18,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 10:10:18,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:10:18,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 10:10:18,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 10:10:18,897 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 185 [2022-10-17 10:10:18,898 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 166 transitions, 351 flow. Second operand has 3 states, 3 states have (on average 171.33333333333334) internal successors, (514), 3 states have internal predecessors, (514), 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) [2022-10-17 10:10:18,899 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:10:18,899 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 185 [2022-10-17 10:10:18,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:10:19,053 INFO L130 PetriNetUnfolder]: 21/425 cut-off events. [2022-10-17 10:10:19,054 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-10-17 10:10:19,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 471 conditions, 425 events. 21/425 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1371 event pairs, 4 based on Foata normal form. 0/399 useless extension candidates. Maximal degree in co-relation 376. Up to 16 conditions per place. [2022-10-17 10:10:19,059 INFO L137 encePairwiseOnDemand]: 182/185 looper letters, 9 selfloop transitions, 2 changer transitions 0/169 dead transitions. [2022-10-17 10:10:19,059 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 169 transitions, 379 flow [2022-10-17 10:10:19,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 10:10:19,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-10-17 10:10:19,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 522 transitions. [2022-10-17 10:10:19,062 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9405405405405406 [2022-10-17 10:10:19,063 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 522 transitions. [2022-10-17 10:10:19,063 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 522 transitions. [2022-10-17 10:10:19,063 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:10:19,063 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 522 transitions. [2022-10-17 10:10:19,065 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 174.0) internal successors, (522), 3 states have internal predecessors, (522), 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) [2022-10-17 10:10:19,069 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 185.0) internal successors, (740), 4 states have internal predecessors, (740), 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) [2022-10-17 10:10:19,070 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 185.0) internal successors, (740), 4 states have internal predecessors, (740), 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) [2022-10-17 10:10:19,070 INFO L175 Difference]: Start difference. First operand has 166 places, 166 transitions, 351 flow. Second operand 3 states and 522 transitions. [2022-10-17 10:10:19,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 169 transitions, 379 flow [2022-10-17 10:10:19,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 169 transitions, 377 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-10-17 10:10:19,079 INFO L231 Difference]: Finished difference. Result has 168 places, 166 transitions, 356 flow [2022-10-17 10:10:19,080 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=344, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=356, PETRI_PLACES=168, PETRI_TRANSITIONS=166} [2022-10-17 10:10:19,081 INFO L287 CegarLoopForPetriNet]: 170 programPoint places, -2 predicate places. [2022-10-17 10:10:19,081 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 166 transitions, 356 flow [2022-10-17 10:10:19,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 171.33333333333334) internal successors, (514), 3 states have internal predecessors, (514), 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) [2022-10-17 10:10:19,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:10:19,082 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:10:19,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-17 10:10:19,083 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-10-17 10:10:19,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:10:19,083 INFO L85 PathProgramCache]: Analyzing trace with hash -1579701380, now seen corresponding path program 1 times [2022-10-17 10:10:19,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:10:19,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511323209] [2022-10-17 10:10:19,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:10:19,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:10:19,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:10:19,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:10:19,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:10:19,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511323209] [2022-10-17 10:10:19,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511323209] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:10:19,212 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:10:19,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 10:10:19,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886307963] [2022-10-17 10:10:19,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:10:19,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 10:10:19,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:10:19,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 10:10:19,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 10:10:19,216 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 185 [2022-10-17 10:10:19,217 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 166 transitions, 356 flow. Second operand has 4 states, 4 states have (on average 166.75) internal successors, (667), 4 states have internal predecessors, (667), 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) [2022-10-17 10:10:19,217 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:10:19,217 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 185 [2022-10-17 10:10:19,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:10:19,363 INFO L130 PetriNetUnfolder]: 41/522 cut-off events. [2022-10-17 10:10:19,364 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-10-17 10:10:19,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 668 conditions, 522 events. 41/522 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2012 event pairs, 13 based on Foata normal form. 0/491 useless extension candidates. Maximal degree in co-relation 403. Up to 37 conditions per place. [2022-10-17 10:10:19,370 INFO L137 encePairwiseOnDemand]: 180/185 looper letters, 16 selfloop transitions, 4 changer transitions 0/174 dead transitions. [2022-10-17 10:10:19,370 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 174 transitions, 417 flow [2022-10-17 10:10:19,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 10:10:19,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-10-17 10:10:19,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 681 transitions. [2022-10-17 10:10:19,374 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9202702702702703 [2022-10-17 10:10:19,374 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 681 transitions. [2022-10-17 10:10:19,374 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 681 transitions. [2022-10-17 10:10:19,375 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:10:19,376 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 681 transitions. [2022-10-17 10:10:19,379 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 170.25) internal successors, (681), 4 states have internal predecessors, (681), 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) [2022-10-17 10:10:19,381 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 185.0) internal successors, (925), 5 states have internal predecessors, (925), 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) [2022-10-17 10:10:19,382 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 185.0) internal successors, (925), 5 states have internal predecessors, (925), 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) [2022-10-17 10:10:19,382 INFO L175 Difference]: Start difference. First operand has 168 places, 166 transitions, 356 flow. Second operand 4 states and 681 transitions. [2022-10-17 10:10:19,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 174 transitions, 417 flow [2022-10-17 10:10:19,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 174 transitions, 415 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-10-17 10:10:19,391 INFO L231 Difference]: Finished difference. Result has 172 places, 169 transitions, 382 flow [2022-10-17 10:10:19,392 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=354, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=382, PETRI_PLACES=172, PETRI_TRANSITIONS=169} [2022-10-17 10:10:19,394 INFO L287 CegarLoopForPetriNet]: 170 programPoint places, 2 predicate places. [2022-10-17 10:10:19,395 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 169 transitions, 382 flow [2022-10-17 10:10:19,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 166.75) internal successors, (667), 4 states have internal predecessors, (667), 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) [2022-10-17 10:10:19,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:10:19,396 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:10:19,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-17 10:10:19,397 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-10-17 10:10:19,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:10:19,398 INFO L85 PathProgramCache]: Analyzing trace with hash -1819207550, now seen corresponding path program 1 times [2022-10-17 10:10:19,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:10:19,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752166003] [2022-10-17 10:10:19,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:10:19,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:10:19,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:10:19,750 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:10:19,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:10:19,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752166003] [2022-10-17 10:10:19,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752166003] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:10:19,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38086097] [2022-10-17 10:10:19,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:10:19,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:10:19,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0af28c61-9fd8-4313-ab70-167af9311caa/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:10:19,753 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0af28c61-9fd8-4313-ab70-167af9311caa/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:10:19,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0af28c61-9fd8-4313-ab70-167af9311caa/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-17 10:10:19,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:10:19,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 4 conjunts are in the unsatisfiable core [2022-10-17 10:10:19,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:10:20,072 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:10:20,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:10:20,225 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:10:20,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38086097] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:10:20,225 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:10:20,226 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-10-17 10:10:20,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788848558] [2022-10-17 10:10:20,226 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:10:20,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-10-17 10:10:20,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:10:20,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-10-17 10:10:20,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-10-17 10:10:20,231 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 185 [2022-10-17 10:10:20,234 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 169 transitions, 382 flow. Second operand has 10 states, 10 states have (on average 164.5) internal successors, (1645), 10 states have internal predecessors, (1645), 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) [2022-10-17 10:10:20,234 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:10:20,235 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 185 [2022-10-17 10:10:20,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:10:20,793 INFO L130 PetriNetUnfolder]: 187/1846 cut-off events. [2022-10-17 10:10:20,793 INFO L131 PetriNetUnfolder]: For 81/81 co-relation queries the response was YES. [2022-10-17 10:10:20,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2409 conditions, 1846 events. 187/1846 cut-off events. For 81/81 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 12140 event pairs, 33 based on Foata normal form. 8/1747 useless extension candidates. Maximal degree in co-relation 1925. Up to 135 conditions per place. [2022-10-17 10:10:20,843 INFO L137 encePairwiseOnDemand]: 179/185 looper letters, 48 selfloop transitions, 14 changer transitions 0/215 dead transitions. [2022-10-17 10:10:20,843 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 215 transitions, 631 flow [2022-10-17 10:10:20,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-10-17 10:10:20,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-10-17 10:10:20,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1684 transitions. [2022-10-17 10:10:20,850 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9102702702702703 [2022-10-17 10:10:20,850 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1684 transitions. [2022-10-17 10:10:20,850 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1684 transitions. [2022-10-17 10:10:20,851 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:10:20,852 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1684 transitions. [2022-10-17 10:10:20,857 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 168.4) internal successors, (1684), 10 states have internal predecessors, (1684), 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) [2022-10-17 10:10:20,863 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 185.0) internal successors, (2035), 11 states have internal predecessors, (2035), 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) [2022-10-17 10:10:20,865 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 185.0) internal successors, (2035), 11 states have internal predecessors, (2035), 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) [2022-10-17 10:10:20,865 INFO L175 Difference]: Start difference. First operand has 172 places, 169 transitions, 382 flow. Second operand 10 states and 1684 transitions. [2022-10-17 10:10:20,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 215 transitions, 631 flow [2022-10-17 10:10:20,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 215 transitions, 629 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-10-17 10:10:20,873 INFO L231 Difference]: Finished difference. Result has 183 places, 182 transitions, 474 flow [2022-10-17 10:10:20,874 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=380, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=474, PETRI_PLACES=183, PETRI_TRANSITIONS=182} [2022-10-17 10:10:20,874 INFO L287 CegarLoopForPetriNet]: 170 programPoint places, 13 predicate places. [2022-10-17 10:10:20,875 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 182 transitions, 474 flow [2022-10-17 10:10:20,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 164.5) internal successors, (1645), 10 states have internal predecessors, (1645), 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) [2022-10-17 10:10:20,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:10:20,877 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:10:20,917 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0af28c61-9fd8-4313-ab70-167af9311caa/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-10-17 10:10:21,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0af28c61-9fd8-4313-ab70-167af9311caa/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:10:21,103 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-10-17 10:10:21,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:10:21,103 INFO L85 PathProgramCache]: Analyzing trace with hash -1427019792, now seen corresponding path program 1 times [2022-10-17 10:10:21,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:10:21,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753766235] [2022-10-17 10:10:21,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:10:21,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:10:21,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:10:21,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:10:21,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:10:21,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753766235] [2022-10-17 10:10:21,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753766235] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:10:21,265 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:10:21,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 10:10:21,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639793773] [2022-10-17 10:10:21,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:10:21,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 10:10:21,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:10:21,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 10:10:21,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 10:10:21,268 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 185 [2022-10-17 10:10:21,269 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 182 transitions, 474 flow. Second operand has 3 states, 3 states have (on average 166.66666666666666) internal successors, (500), 3 states have internal predecessors, (500), 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) [2022-10-17 10:10:21,269 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:10:21,269 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 185 [2022-10-17 10:10:21,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:10:21,534 INFO L130 PetriNetUnfolder]: 53/1081 cut-off events. [2022-10-17 10:10:21,534 INFO L131 PetriNetUnfolder]: For 56/56 co-relation queries the response was YES. [2022-10-17 10:10:21,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1377 conditions, 1081 events. 53/1081 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 4730 event pairs, 10 based on Foata normal form. 11/1047 useless extension candidates. Maximal degree in co-relation 843. Up to 46 conditions per place. [2022-10-17 10:10:21,543 INFO L137 encePairwiseOnDemand]: 181/185 looper letters, 12 selfloop transitions, 4 changer transitions 0/179 dead transitions. [2022-10-17 10:10:21,543 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 179 transitions, 485 flow [2022-10-17 10:10:21,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 10:10:21,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-10-17 10:10:21,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 507 transitions. [2022-10-17 10:10:21,546 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9135135135135135 [2022-10-17 10:10:21,546 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 507 transitions. [2022-10-17 10:10:21,546 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 507 transitions. [2022-10-17 10:10:21,547 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:10:21,547 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 507 transitions. [2022-10-17 10:10:21,549 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 169.0) internal successors, (507), 3 states have internal predecessors, (507), 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) [2022-10-17 10:10:21,550 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 185.0) internal successors, (740), 4 states have internal predecessors, (740), 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) [2022-10-17 10:10:21,551 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 185.0) internal successors, (740), 4 states have internal predecessors, (740), 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) [2022-10-17 10:10:21,551 INFO L175 Difference]: Start difference. First operand has 183 places, 182 transitions, 474 flow. Second operand 3 states and 507 transitions. [2022-10-17 10:10:21,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 179 transitions, 485 flow [2022-10-17 10:10:21,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 179 transitions, 473 flow, removed 5 selfloop flow, removed 1 redundant places. [2022-10-17 10:10:21,559 INFO L231 Difference]: Finished difference. Result has 183 places, 177 transitions, 442 flow [2022-10-17 10:10:21,560 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=434, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=442, PETRI_PLACES=183, PETRI_TRANSITIONS=177} [2022-10-17 10:10:21,561 INFO L287 CegarLoopForPetriNet]: 170 programPoint places, 13 predicate places. [2022-10-17 10:10:21,561 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 177 transitions, 442 flow [2022-10-17 10:10:21,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 166.66666666666666) internal successors, (500), 3 states have internal predecessors, (500), 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) [2022-10-17 10:10:21,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:10:21,562 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:10:21,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-10-17 10:10:21,563 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-10-17 10:10:21,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:10:21,563 INFO L85 PathProgramCache]: Analyzing trace with hash 569749527, now seen corresponding path program 1 times [2022-10-17 10:10:21,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:10:21,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618982618] [2022-10-17 10:10:21,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:10:21,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:10:21,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:10:21,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:10:21,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:10:21,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618982618] [2022-10-17 10:10:21,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618982618] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:10:21,763 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:10:21,763 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-10-17 10:10:21,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792894127] [2022-10-17 10:10:21,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:10:21,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-17 10:10:21,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:10:21,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-17 10:10:21,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-10-17 10:10:21,768 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 185 [2022-10-17 10:10:21,769 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 177 transitions, 442 flow. Second operand has 7 states, 7 states have (on average 154.28571428571428) internal successors, (1080), 7 states have internal predecessors, (1080), 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) [2022-10-17 10:10:21,769 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:10:21,770 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 185 [2022-10-17 10:10:21,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:10:22,307 INFO L130 PetriNetUnfolder]: 119/1236 cut-off events. [2022-10-17 10:10:22,307 INFO L131 PetriNetUnfolder]: For 129/129 co-relation queries the response was YES. [2022-10-17 10:10:22,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1843 conditions, 1236 events. 119/1236 cut-off events. For 129/129 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 6115 event pairs, 19 based on Foata normal form. 0/1183 useless extension candidates. Maximal degree in co-relation 1239. Up to 178 conditions per place. [2022-10-17 10:10:22,318 INFO L137 encePairwiseOnDemand]: 174/185 looper letters, 49 selfloop transitions, 13 changer transitions 0/205 dead transitions. [2022-10-17 10:10:22,319 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 205 transitions, 651 flow [2022-10-17 10:10:22,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-10-17 10:10:22,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-10-17 10:10:22,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1425 transitions. [2022-10-17 10:10:22,325 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8558558558558559 [2022-10-17 10:10:22,325 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1425 transitions. [2022-10-17 10:10:22,325 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1425 transitions. [2022-10-17 10:10:22,326 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:10:22,327 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1425 transitions. [2022-10-17 10:10:22,332 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 158.33333333333334) internal successors, (1425), 9 states have internal predecessors, (1425), 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) [2022-10-17 10:10:22,336 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 185.0) internal successors, (1850), 10 states have internal predecessors, (1850), 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) [2022-10-17 10:10:22,338 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 185.0) internal successors, (1850), 10 states have internal predecessors, (1850), 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) [2022-10-17 10:10:22,338 INFO L175 Difference]: Start difference. First operand has 183 places, 177 transitions, 442 flow. Second operand 9 states and 1425 transitions. [2022-10-17 10:10:22,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 205 transitions, 651 flow [2022-10-17 10:10:22,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 205 transitions, 647 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-10-17 10:10:22,348 INFO L231 Difference]: Finished difference. Result has 195 places, 184 transitions, 526 flow [2022-10-17 10:10:22,348 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=438, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=526, PETRI_PLACES=195, PETRI_TRANSITIONS=184} [2022-10-17 10:10:22,349 INFO L287 CegarLoopForPetriNet]: 170 programPoint places, 25 predicate places. [2022-10-17 10:10:22,349 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 184 transitions, 526 flow [2022-10-17 10:10:22,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 154.28571428571428) internal successors, (1080), 7 states have internal predecessors, (1080), 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) [2022-10-17 10:10:22,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:10:22,351 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:10:22,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-10-17 10:10:22,351 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-10-17 10:10:22,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:10:22,352 INFO L85 PathProgramCache]: Analyzing trace with hash -1194335221, now seen corresponding path program 1 times [2022-10-17 10:10:22,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:10:22,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902838725] [2022-10-17 10:10:22,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:10:22,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:10:22,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:10:25,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:10:25,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:10:25,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902838725] [2022-10-17 10:10:25,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902838725] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:10:25,513 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:10:25,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-10-17 10:10:25,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609476812] [2022-10-17 10:10:25,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:10:25,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-10-17 10:10:25,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:10:25,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-10-17 10:10:25,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=675, Unknown=0, NotChecked=0, Total=756 [2022-10-17 10:10:25,523 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 185 [2022-10-17 10:10:25,527 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 184 transitions, 526 flow. Second operand has 28 states, 28 states have (on average 95.57142857142857) internal successors, (2676), 28 states have internal predecessors, (2676), 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) [2022-10-17 10:10:25,527 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:10:25,527 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 185 [2022-10-17 10:10:25,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:10:29,904 INFO L130 PetriNetUnfolder]: 1048/4073 cut-off events. [2022-10-17 10:10:29,905 INFO L131 PetriNetUnfolder]: For 605/608 co-relation queries the response was YES. [2022-10-17 10:10:29,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7610 conditions, 4073 events. 1048/4073 cut-off events. For 605/608 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 29780 event pairs, 351 based on Foata normal form. 5/3948 useless extension candidates. Maximal degree in co-relation 4256. Up to 1516 conditions per place. [2022-10-17 10:10:29,964 INFO L137 encePairwiseOnDemand]: 148/185 looper letters, 281 selfloop transitions, 43 changer transitions 5/418 dead transitions. [2022-10-17 10:10:29,964 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 418 transitions, 1787 flow [2022-10-17 10:10:29,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-10-17 10:10:29,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2022-10-17 10:10:29,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 3665 transitions. [2022-10-17 10:10:29,990 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.5503003003003003 [2022-10-17 10:10:29,990 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 3665 transitions. [2022-10-17 10:10:29,990 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 3665 transitions. [2022-10-17 10:10:29,994 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:10:29,994 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 3665 transitions. [2022-10-17 10:10:30,007 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 101.80555555555556) internal successors, (3665), 36 states have internal predecessors, (3665), 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) [2022-10-17 10:10:30,025 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 185.0) internal successors, (6845), 37 states have internal predecessors, (6845), 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) [2022-10-17 10:10:30,029 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 185.0) internal successors, (6845), 37 states have internal predecessors, (6845), 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) [2022-10-17 10:10:30,030 INFO L175 Difference]: Start difference. First operand has 195 places, 184 transitions, 526 flow. Second operand 36 states and 3665 transitions. [2022-10-17 10:10:30,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 418 transitions, 1787 flow [2022-10-17 10:10:30,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 418 transitions, 1776 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-10-17 10:10:30,045 INFO L231 Difference]: Finished difference. Result has 254 places, 220 transitions, 841 flow [2022-10-17 10:10:30,046 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=518, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=841, PETRI_PLACES=254, PETRI_TRANSITIONS=220} [2022-10-17 10:10:30,047 INFO L287 CegarLoopForPetriNet]: 170 programPoint places, 84 predicate places. [2022-10-17 10:10:30,047 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 220 transitions, 841 flow [2022-10-17 10:10:30,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 95.57142857142857) internal successors, (2676), 28 states have internal predecessors, (2676), 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) [2022-10-17 10:10:30,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:10:30,050 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:10:30,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-10-17 10:10:30,050 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-10-17 10:10:30,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:10:30,051 INFO L85 PathProgramCache]: Analyzing trace with hash -1145094813, now seen corresponding path program 2 times [2022-10-17 10:10:30,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:10:30,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679686084] [2022-10-17 10:10:30,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:10:30,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:10:30,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:10:32,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:10:32,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:10:32,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679686084] [2022-10-17 10:10:32,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679686084] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:10:32,384 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:10:32,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-10-17 10:10:32,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301132414] [2022-10-17 10:10:32,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:10:32,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-10-17 10:10:32,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:10:32,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-10-17 10:10:32,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=616, Unknown=0, NotChecked=0, Total=702 [2022-10-17 10:10:32,394 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 185 [2022-10-17 10:10:32,398 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 220 transitions, 841 flow. Second operand has 27 states, 27 states have (on average 96.66666666666667) internal successors, (2610), 27 states have internal predecessors, (2610), 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) [2022-10-17 10:10:32,398 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:10:32,398 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 185 [2022-10-17 10:10:32,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:10:39,429 INFO L130 PetriNetUnfolder]: 1419/5642 cut-off events. [2022-10-17 10:10:39,429 INFO L131 PetriNetUnfolder]: For 1865/1865 co-relation queries the response was YES. [2022-10-17 10:10:39,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11906 conditions, 5642 events. 1419/5642 cut-off events. For 1865/1865 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 43128 event pairs, 122 based on Foata normal form. 16/5566 useless extension candidates. Maximal degree in co-relation 10056. Up to 1303 conditions per place. [2022-10-17 10:10:39,600 INFO L137 encePairwiseOnDemand]: 151/185 looper letters, 334 selfloop transitions, 89 changer transitions 7/519 dead transitions. [2022-10-17 10:10:39,600 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 519 transitions, 2707 flow [2022-10-17 10:10:39,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-10-17 10:10:39,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2022-10-17 10:10:39,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 5562 transitions. [2022-10-17 10:10:39,620 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.5466339066339067 [2022-10-17 10:10:39,620 INFO L72 ComplementDD]: Start complementDD. Operand 55 states and 5562 transitions. [2022-10-17 10:10:39,620 INFO L73 IsDeterministic]: Start isDeterministic. Operand 55 states and 5562 transitions. [2022-10-17 10:10:39,625 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:10:39,625 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 55 states and 5562 transitions. [2022-10-17 10:10:39,641 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 56 states, 55 states have (on average 101.12727272727273) internal successors, (5562), 55 states have internal predecessors, (5562), 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) [2022-10-17 10:10:39,664 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 56 states, 56 states have (on average 185.0) internal successors, (10360), 56 states have internal predecessors, (10360), 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) [2022-10-17 10:10:39,677 INFO L81 ComplementDD]: Finished complementDD. Result has 56 states, 56 states have (on average 185.0) internal successors, (10360), 56 states have internal predecessors, (10360), 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) [2022-10-17 10:10:39,685 INFO L175 Difference]: Start difference. First operand has 254 places, 220 transitions, 841 flow. Second operand 55 states and 5562 transitions. [2022-10-17 10:10:39,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 519 transitions, 2707 flow [2022-10-17 10:10:39,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 519 transitions, 2685 flow, removed 5 selfloop flow, removed 6 redundant places. [2022-10-17 10:10:39,712 INFO L231 Difference]: Finished difference. Result has 339 places, 270 transitions, 1475 flow [2022-10-17 10:10:39,713 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=819, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=55, PETRI_FLOW=1475, PETRI_PLACES=339, PETRI_TRANSITIONS=270} [2022-10-17 10:10:39,716 INFO L287 CegarLoopForPetriNet]: 170 programPoint places, 169 predicate places. [2022-10-17 10:10:39,716 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 270 transitions, 1475 flow [2022-10-17 10:10:39,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 96.66666666666667) internal successors, (2610), 27 states have internal predecessors, (2610), 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) [2022-10-17 10:10:39,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:10:39,719 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:10:39,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-10-17 10:10:39,719 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-10-17 10:10:39,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:10:39,720 INFO L85 PathProgramCache]: Analyzing trace with hash -1405303785, now seen corresponding path program 1 times [2022-10-17 10:10:39,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:10:39,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178741344] [2022-10-17 10:10:39,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:10:39,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:10:39,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-10-17 10:10:39,773 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-10-17 10:10:39,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-10-17 10:10:39,882 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-10-17 10:10:39,883 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-10-17 10:10:39,884 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 6 remaining) [2022-10-17 10:10:39,886 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 6 remaining) [2022-10-17 10:10:39,887 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 6 remaining) [2022-10-17 10:10:39,887 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2022-10-17 10:10:39,887 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2022-10-17 10:10:39,887 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2022-10-17 10:10:39,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-10-17 10:10:39,888 INFO L444 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:10:39,895 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-10-17 10:10:39,896 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-10-17 10:10:40,067 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.10 10:10:40 BasicIcfg [2022-10-17 10:10:40,067 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-10-17 10:10:40,068 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-10-17 10:10:40,068 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-10-17 10:10:40,068 INFO L275 PluginConnector]: Witness Printer initialized [2022-10-17 10:10:40,068 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:10:17" (3/4) ... [2022-10-17 10:10:40,070 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-10-17 10:10:40,215 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0af28c61-9fd8-4313-ab70-167af9311caa/bin/uautomizer-J5u9QxTXDZ/witness.graphml [2022-10-17 10:10:40,215 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-10-17 10:10:40,216 INFO L158 Benchmark]: Toolchain (without parser) took 24624.42ms. Allocated memory was 100.7MB in the beginning and 354.4MB in the end (delta: 253.8MB). Free memory was 65.6MB in the beginning and 127.5MB in the end (delta: -61.9MB). Peak memory consumption was 191.1MB. Max. memory is 16.1GB. [2022-10-17 10:10:40,217 INFO L158 Benchmark]: CDTParser took 0.29ms. Allocated memory is still 100.7MB. Free memory is still 56.5MB. There was no memory consumed. Max. memory is 16.1GB. [2022-10-17 10:10:40,217 INFO L158 Benchmark]: CACSL2BoogieTranslator took 709.50ms. Allocated memory is still 100.7MB. Free memory was 65.3MB in the beginning and 52.9MB in the end (delta: 12.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-10-17 10:10:40,218 INFO L158 Benchmark]: Boogie Procedure Inliner took 91.19ms. Allocated memory is still 100.7MB. Free memory was 52.9MB in the beginning and 50.1MB in the end (delta: 2.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-10-17 10:10:40,218 INFO L158 Benchmark]: Boogie Preprocessor took 75.28ms. Allocated memory is still 100.7MB. Free memory was 50.1MB in the beginning and 48.5MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-10-17 10:10:40,219 INFO L158 Benchmark]: RCFGBuilder took 831.97ms. Allocated memory was 100.7MB in the beginning and 138.4MB in the end (delta: 37.7MB). Free memory was 48.5MB in the beginning and 101.0MB in the end (delta: -52.6MB). Peak memory consumption was 11.5MB. Max. memory is 16.1GB. [2022-10-17 10:10:40,219 INFO L158 Benchmark]: TraceAbstraction took 22758.40ms. Allocated memory was 138.4MB in the beginning and 354.4MB in the end (delta: 216.0MB). Free memory was 100.0MB in the beginning and 165.2MB in the end (delta: -65.2MB). Peak memory consumption was 150.8MB. Max. memory is 16.1GB. [2022-10-17 10:10:40,220 INFO L158 Benchmark]: Witness Printer took 147.93ms. Allocated memory is still 354.4MB. Free memory was 165.2MB in the beginning and 127.5MB in the end (delta: 37.7MB). Peak memory consumption was 37.7MB. Max. memory is 16.1GB. [2022-10-17 10:10:40,223 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29ms. Allocated memory is still 100.7MB. Free memory is still 56.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 709.50ms. Allocated memory is still 100.7MB. Free memory was 65.3MB in the beginning and 52.9MB in the end (delta: 12.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 91.19ms. Allocated memory is still 100.7MB. Free memory was 52.9MB in the beginning and 50.1MB in the end (delta: 2.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 75.28ms. Allocated memory is still 100.7MB. Free memory was 50.1MB in the beginning and 48.5MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 831.97ms. Allocated memory was 100.7MB in the beginning and 138.4MB in the end (delta: 37.7MB). Free memory was 48.5MB in the beginning and 101.0MB in the end (delta: -52.6MB). Peak memory consumption was 11.5MB. Max. memory is 16.1GB. * TraceAbstraction took 22758.40ms. Allocated memory was 138.4MB in the beginning and 354.4MB in the end (delta: 216.0MB). Free memory was 100.0MB in the beginning and 165.2MB in the end (delta: -65.2MB). Peak memory consumption was 150.8MB. Max. memory is 16.1GB. * Witness Printer took 147.93ms. Allocated memory is still 354.4MB. Free memory was 165.2MB in the beginning and 127.5MB in the end (delta: 37.7MB). Peak memory consumption was 37.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 941]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L935] 0 static int top=0; VAL [top=0] [L936] 0 static unsigned int arr[(5)]; VAL [arr={5:0}, top=0] [L937] 0 pthread_mutex_t m; VAL [arr={5:0}, m={6:0}, top=0] [L938] 0 _Bool flag=(0); VAL [arr={5:0}, flag=0, m={6:0}, top=0] [L1021] 0 pthread_t id1, id2; VAL [arr={5:0}, flag=0, id1={9:0}, id2={7:0}, m={6:0}, top=0] [L1023] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [arr={5:0}, flag=0, id1={9:0}, id2={7:0}, m={6:0}, pthread_create(&id1, ((void *)0), t1, ((void *)0))=13, top=0] [L990] 1 int i; VAL [arg={0:0}, arg={0:0}, arr={5:0}, flag=0, m={6:0}, top=0] [L991] 1 unsigned int tmp; VAL [arg={0:0}, arg={0:0}, arr={5:0}, flag=0, m={6:0}, top=0] [L992] 1 i=0 VAL [arg={0:0}, arg={0:0}, arr={5:0}, flag=0, i=0, m={6:0}, top=0] [L992] COND TRUE 1 i<(5) VAL [arg={0:0}, arg={0:0}, arr={5:0}, flag=0, i=0, m={6:0}, top=0] [L995] 1 tmp = __VERIFIER_nondet_uint() VAL [__VERIFIER_nondet_uint()=4294967300, arg={0:0}, arg={0:0}, arr={5:0}, flag=0, i=0, m={6:0}, tmp=4, top=0] [L996] CALL 1 assume_abort_if_not(tmp < (5)) [L1024] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [arr={5:0}, flag=0, id1={9:0}, id2={7:0}, m={6:0}, pthread_create(&id2, ((void *)0), t2, ((void *)0))=14, top=0] [L23] COND FALSE 1 !(!cond) VAL [\old(cond)=1, arr={5:0}, cond=1, flag=0, m={6:0}, top=0] [L996] RET 1 assume_abort_if_not(tmp < (5)) [L997] CALL, EXPR 1 push(arr,tmp) [L962] COND FALSE 1 !(top==(5)) VAL [\old(x)=4, arr={5:0}, flag=0, m={6:0}, stack={5:0}, stack={5:0}, top=0, x=4] [L969] CALL, EXPR 1 get_top() [L954] 1 return top; VAL [\result=0, arr={5:0}, flag=0, m={6:0}, top=0] [L969] RET, EXPR 1 get_top() [L969] 1 stack[get_top()] = x VAL [\old(x)=4, arr={5:0}, flag=0, get_top()=0, m={6:0}, stack={5:0}, stack={5:0}, top=0, x=4] [L970] CALL 1 inc_top() [L946] 1 top++ VAL [arr={5:0}, flag=0, m={6:0}, top=1] [L1006] 2 int i; VAL [arg={0:0}, arg={0:0}, arr={5:0}, flag=0, m={6:0}, top=1] [L1007] 2 i=0 VAL [arg={0:0}, arg={0:0}, arr={5:0}, flag=0, i=0, m={6:0}, top=1] [L1007] COND TRUE 2 i<(5) VAL [arg={0:0}, arg={0:0}, arr={5:0}, flag=0, i=0, m={6:0}, top=1] [L970] RET 1 inc_top() [L972] 1 return 0; VAL [\old(x)=4, \result=0, arr={5:0}, flag=0, m={6:0}, stack={5:0}, stack={5:0}, top=1, x=4] [L997] RET, EXPR 1 push(arr,tmp) [L997] COND FALSE 1 !(push(arr,tmp)==(-1)) VAL [arg={0:0}, arg={0:0}, arr={5:0}, flag=0, i=0, m={6:0}, push(arr,tmp)=0, tmp=4, top=1] [L999] 1 flag=(1) VAL [arg={0:0}, arg={0:0}, arr={5:0}, flag=1, i=0, m={6:0}, tmp=4, top=1] [L1010] COND TRUE 2 \read(flag) VAL [arg={0:0}, arg={0:0}, arr={5:0}, flag=1, i=0, m={6:0}, top=1] [L1012] CALL, EXPR 2 pop(arr) [L976] CALL, EXPR 2 get_top() [L954] 2 return top; VAL [\result=0, \result=1, arr={5:0}, flag=1, m={6:0}, top=1] [L976] RET, EXPR 2 get_top() [L976] COND FALSE 2 !(get_top()==0) VAL [arr={5:0}, flag=1, get_top()=1, m={6:0}, stack={5:0}, stack={5:0}, top=1] [L983] CALL 2 dec_top() [L950] 2 top-- VAL [arr={5:0}, flag=1, m={6:0}, top=0] [L983] RET 2 dec_top() [L984] CALL, EXPR 2 get_top() [L954] 2 return top; VAL [\result=0, \result=0, arr={5:0}, flag=1, m={6:0}, top=0] [L984] RET, EXPR 2 get_top() [L984] EXPR 2 stack[get_top()] VAL [arr={5:0}, flag=1, get_top()=0, m={6:0}, stack={5:0}, stack={5:0}, stack[get_top()]=4, top=0] [L984] 2 return stack[get_top()]; VAL [\result=4, arr={5:0}, flag=1, get_top()=0, m={6:0}, stack={5:0}, stack={5:0}, stack[get_top()]=4, top=0] [L1012] RET, EXPR 2 pop(arr) [L1012] COND FALSE 2 !(!(pop(arr)!=(-2))) VAL [arg={0:0}, arg={0:0}, arr={5:0}, flag=1, i=0, m={6:0}, pop(arr)=4, top=0] [L1007] 2 i++ VAL [arg={0:0}, arg={0:0}, arr={5:0}, flag=1, i=1, m={6:0}, top=0] [L1007] COND TRUE 2 i<(5) VAL [arg={0:0}, arg={0:0}, arr={5:0}, flag=1, i=1, m={6:0}, top=0] [L1010] COND TRUE 2 \read(flag) VAL [arg={0:0}, arg={0:0}, arr={5:0}, flag=1, i=1, m={6:0}, top=0] [L1012] CALL, EXPR 2 pop(arr) [L976] CALL, EXPR 2 get_top() [L954] 2 return top; VAL [\result=0, \result=0, arr={5:0}, flag=1, m={6:0}, top=0] [L976] RET, EXPR 2 get_top() [L976] COND TRUE 2 get_top()==0 VAL [arr={5:0}, flag=1, get_top()=0, m={6:0}, stack={5:0}, stack={5:0}, top=0] [L979] 2 return (-2); VAL [\result=-2, arr={5:0}, flag=1, m={6:0}, stack={5:0}, stack={5:0}, top=0] [L1012] RET, EXPR 2 pop(arr) [L1012] COND TRUE 2 !(pop(arr)!=(-2)) VAL [arg={0:0}, arg={0:0}, arr={5:0}, flag=1, i=1, m={6:0}, pop(arr)=-2, top=0] [L1013] CALL 2 error() [L941] 2 reach_error() VAL [arr={5:0}, flag=1, m={6:0}, top=0] - UnprovableResult [Line: 1024]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 1023]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 941]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 294 locations, 6 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 22.4s, OverallIterations: 9, TraceHistogramMax: 2, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 14.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.2s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1346 SdHoareTripleChecker+Valid, 3.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1346 mSDsluCounter, 3219 SdHoareTripleChecker+Invalid, 3.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 3593 mSDsCounter, 77 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 5169 IncrementalHoareTripleChecker+Invalid, 5246 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 77 mSolverCounterUnsat, 237 mSDtfsCounter, 5169 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 387 GetRequests, 232 SyntacticMatches, 2 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1934 ImplicationChecksByTransitivity, 6.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1475occurred in iteration=8, InterpolantAutomatonStates: 123, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 6.9s InterpolantComputationTime, 1092 NumberOfCodeBlocks, 1092 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 1035 ConstructedInterpolants, 0 QuantifiedInterpolants, 6775 SizeOfPredicates, 2 NumberOfNonLiveVariables, 256 ConjunctsInSsa, 4 ConjunctsInUnsatCore, 10 InterpolantComputations, 7 PerfectInterpolantSequences, 12/66 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-10-17 10:10:40,280 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0af28c61-9fd8-4313-ab70-167af9311caa/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE