./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 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98e7cee5-6515-415b-a93f-d7c128636875/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98e7cee5-6515-415b-a93f-d7c128636875/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98e7cee5-6515-415b-a93f-d7c128636875/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98e7cee5-6515-415b-a93f-d7c128636875/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/stack-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98e7cee5-6515-415b-a93f-d7c128636875/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98e7cee5-6515-415b-a93f-d7c128636875/bin/uautomizer-verify-uCwYo4JHxu --witnessprinter.witness.filename witness --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 --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:41:47,651 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:41:47,765 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98e7cee5-6515-415b-a93f-d7c128636875/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 07:41:47,770 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:41:47,771 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:41:47,803 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:41:47,806 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:41:47,807 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:41:47,808 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:41:47,815 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:41:47,816 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:41:47,816 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:41:47,817 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:41:47,819 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:41:47,819 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:41:47,820 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:41:47,820 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:41:47,821 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:41:47,821 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:41:47,822 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:41:47,822 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:41:47,823 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:41:47,823 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:41:47,824 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:41:47,824 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:41:47,825 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:41:47,825 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:41:47,826 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:41:47,826 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:41:47,827 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:41:47,827 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:41:47,828 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:41:47,828 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:41:47,829 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:41:47,830 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:41:47,830 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:41:47,830 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:41:47,831 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:41:47,831 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:41:47,831 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98e7cee5-6515-415b-a93f-d7c128636875/bin/uautomizer-verify-uCwYo4JHxu/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98e7cee5-6515-415b-a93f-d7c128636875/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1c5d098180a5596f0a60d3177354c69a5ee6da68b8191dc75b6c33b291ef0421 [2023-11-19 07:41:48,150 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:41:48,210 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:41:48,215 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:41:48,216 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:41:48,217 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:41:48,218 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98e7cee5-6515-415b-a93f-d7c128636875/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/pthread/stack-2.i [2023-11-19 07:41:51,437 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:41:51,777 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:41:51,777 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98e7cee5-6515-415b-a93f-d7c128636875/sv-benchmarks/c/pthread/stack-2.i [2023-11-19 07:41:51,803 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98e7cee5-6515-415b-a93f-d7c128636875/bin/uautomizer-verify-uCwYo4JHxu/data/349b5b4c5/fcec045fadc2400da5c4eb8283a21218/FLAG93bd78946 [2023-11-19 07:41:51,821 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98e7cee5-6515-415b-a93f-d7c128636875/bin/uautomizer-verify-uCwYo4JHxu/data/349b5b4c5/fcec045fadc2400da5c4eb8283a21218 [2023-11-19 07:41:51,823 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:41:51,825 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:41:51,831 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:41:51,831 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:41:51,842 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:41:51,843 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:41:51" (1/1) ... [2023-11-19 07:41:51,844 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37352f49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:51, skipping insertion in model container [2023-11-19 07:41:51,845 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:41:51" (1/1) ... [2023-11-19 07:41:51,948 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:41:52,407 WARN L240 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_98e7cee5-6515-415b-a93f-d7c128636875/sv-benchmarks/c/pthread/stack-2.i[41520,41533] [2023-11-19 07:41:52,456 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:41:52,474 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:41:52,549 WARN L240 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_98e7cee5-6515-415b-a93f-d7c128636875/sv-benchmarks/c/pthread/stack-2.i[41520,41533] [2023-11-19 07:41:52,578 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:41:52,678 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:41:52,678 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:52 WrapperNode [2023-11-19 07:41:52,679 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:41:52,680 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:41:52,681 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:41:52,681 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:41:52,690 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:52" (1/1) ... [2023-11-19 07:41:52,738 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:52" (1/1) ... [2023-11-19 07:41:52,775 INFO L138 Inliner]: procedures = 277, calls = 44, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 159 [2023-11-19 07:41:52,776 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:41:52,777 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:41:52,777 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:41:52,777 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:41:52,788 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:52" (1/1) ... [2023-11-19 07:41:52,789 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:52" (1/1) ... [2023-11-19 07:41:52,795 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:52" (1/1) ... [2023-11-19 07:41:52,795 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:52" (1/1) ... [2023-11-19 07:41:52,804 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:52" (1/1) ... [2023-11-19 07:41:52,808 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:52" (1/1) ... [2023-11-19 07:41:52,811 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:52" (1/1) ... [2023-11-19 07:41:52,812 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:52" (1/1) ... [2023-11-19 07:41:52,817 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:41:52,818 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:41:52,818 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:41:52,818 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:41:52,819 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:52" (1/1) ... [2023-11-19 07:41:52,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:41:52,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98e7cee5-6515-415b-a93f-d7c128636875/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:41:52,857 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98e7cee5-6515-415b-a93f-d7c128636875/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:41:52,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98e7cee5-6515-415b-a93f-d7c128636875/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:41:52,920 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-11-19 07:41:52,920 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-11-19 07:41:52,920 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-11-19 07:41:52,920 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-11-19 07:41:52,921 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 07:41:52,921 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 07:41:52,921 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 07:41:52,921 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 07:41:52,921 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-19 07:41:52,921 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:41:52,922 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:41:52,922 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:41:52,922 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:41:52,926 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-19 07:41:53,231 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:41:53,234 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:41:53,547 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:41:53,559 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:41:53,560 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-19 07:41:53,564 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:41:53 BoogieIcfgContainer [2023-11-19 07:41:53,565 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:41:53,567 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:41:53,567 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:41:53,571 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:41:53,571 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:41:51" (1/3) ... [2023-11-19 07:41:53,572 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77577a04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:41:53, skipping insertion in model container [2023-11-19 07:41:53,572 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:52" (2/3) ... [2023-11-19 07:41:53,573 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77577a04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:41:53, skipping insertion in model container [2023-11-19 07:41:53,573 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:41:53" (3/3) ... [2023-11-19 07:41:53,574 INFO L112 eAbstractionObserver]: Analyzing ICFG stack-2.i [2023-11-19 07:41:53,583 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-19 07:41:53,591 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:41:53,591 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-19 07:41:53,591 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 07:41:53,722 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-19 07:41:53,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 167 places, 170 transitions, 354 flow [2023-11-19 07:41:53,878 INFO L124 PetriNetUnfolderBase]: 10/168 cut-off events. [2023-11-19 07:41:53,878 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 07:41:53,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 177 conditions, 168 events. 10/168 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 420 event pairs, 0 based on Foata normal form. 0/156 useless extension candidates. Maximal degree in co-relation 126. Up to 3 conditions per place. [2023-11-19 07:41:53,889 INFO L82 GeneralOperation]: Start removeDead. Operand has 167 places, 170 transitions, 354 flow [2023-11-19 07:41:53,897 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 155 places, 158 transitions, 325 flow [2023-11-19 07:41:53,900 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:41:53,913 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 155 places, 158 transitions, 325 flow [2023-11-19 07:41:53,916 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 155 places, 158 transitions, 325 flow [2023-11-19 07:41:53,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 155 places, 158 transitions, 325 flow [2023-11-19 07:41:53,972 INFO L124 PetriNetUnfolderBase]: 10/158 cut-off events. [2023-11-19 07:41:53,973 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-19 07:41:53,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 166 conditions, 158 events. 10/158 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 341 event pairs, 0 based on Foata normal form. 0/146 useless extension candidates. Maximal degree in co-relation 126. Up to 3 conditions per place. [2023-11-19 07:41:53,988 INFO L119 LiptonReduction]: Number of co-enabled transitions 8340 [2023-11-19 07:41:59,231 INFO L134 LiptonReduction]: Checked pairs total: 10668 [2023-11-19 07:41:59,232 INFO L136 LiptonReduction]: Total number of compositions: 150 [2023-11-19 07:41:59,267 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:41:59,275 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=LoopHeads, 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;@335d6475, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:41:59,276 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-19 07:41:59,280 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:41:59,281 INFO L124 PetriNetUnfolderBase]: 0/12 cut-off events. [2023-11-19 07:41:59,281 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-19 07:41:59,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:41:59,282 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-19 07:41:59,283 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-19 07:41:59,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:59,289 INFO L85 PathProgramCache]: Analyzing trace with hash -1233763141, now seen corresponding path program 1 times [2023-11-19 07:41:59,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:59,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541149183] [2023-11-19 07:41:59,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:59,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:59,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:59,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:41:59,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:41:59,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541149183] [2023-11-19 07:41:59,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541149183] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:41:59,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:41:59,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:41:59,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032812454] [2023-11-19 07:41:59,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:41:59,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:41:59,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:41:59,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:41:59,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:41:59,764 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 320 [2023-11-19 07:41:59,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 157.0) internal successors, (471), 3 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:59,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:41:59,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 320 [2023-11-19 07:41:59,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:42:00,142 INFO L124 PetriNetUnfolderBase]: 917/1474 cut-off events. [2023-11-19 07:42:00,143 INFO L125 PetriNetUnfolderBase]: For 77/77 co-relation queries the response was YES. [2023-11-19 07:42:00,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3012 conditions, 1474 events. 917/1474 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 6132 event pairs, 270 based on Foata normal form. 0/1164 useless extension candidates. Maximal degree in co-relation 2788. Up to 840 conditions per place. [2023-11-19 07:42:00,158 INFO L140 encePairwiseOnDemand]: 315/320 looper letters, 57 selfloop transitions, 4 changer transitions 0/61 dead transitions. [2023-11-19 07:42:00,158 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 61 transitions, 259 flow [2023-11-19 07:42:00,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:42:00,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:42:00,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 527 transitions. [2023-11-19 07:42:00,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5489583333333333 [2023-11-19 07:42:00,188 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 527 transitions. [2023-11-19 07:42:00,189 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 527 transitions. [2023-11-19 07:42:00,194 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:42:00,197 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 527 transitions. [2023-11-19 07:42:00,205 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 175.66666666666666) internal successors, (527), 3 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:42:00,214 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 320.0) internal successors, (1280), 4 states have internal predecessors, (1280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:42:00,215 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 320.0) internal successors, (1280), 4 states have internal predecessors, (1280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:42:00,218 INFO L175 Difference]: Start difference. First operand has 35 places, 33 transitions, 75 flow. Second operand 3 states and 527 transitions. [2023-11-19 07:42:00,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 61 transitions, 259 flow [2023-11-19 07:42:00,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 61 transitions, 251 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-19 07:42:00,227 INFO L231 Difference]: Finished difference. Result has 36 places, 36 transitions, 100 flow [2023-11-19 07:42:00,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=320, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=36, PETRI_TRANSITIONS=36} [2023-11-19 07:42:00,235 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 1 predicate places. [2023-11-19 07:42:00,235 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 36 transitions, 100 flow [2023-11-19 07:42:00,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 157.0) internal successors, (471), 3 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:42:00,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:42:00,236 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:42:00,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:42:00,238 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-19 07:42:00,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:42:00,241 INFO L85 PathProgramCache]: Analyzing trace with hash 180487044, now seen corresponding path program 1 times [2023-11-19 07:42:00,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:42:00,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953357825] [2023-11-19 07:42:00,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:42:00,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:42:00,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:00,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:42:00,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:42:00,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953357825] [2023-11-19 07:42:00,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953357825] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:42:00,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:42:00,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:42:00,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335797090] [2023-11-19 07:42:00,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:42:00,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:42:00,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:42:00,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:42:00,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:42:00,500 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 320 [2023-11-19 07:42:00,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 36 transitions, 100 flow. Second operand has 3 states, 3 states have (on average 159.0) internal successors, (477), 3 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:42:00,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:42:00,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 320 [2023-11-19 07:42:00,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:42:00,820 INFO L124 PetriNetUnfolderBase]: 987/1600 cut-off events. [2023-11-19 07:42:00,821 INFO L125 PetriNetUnfolderBase]: For 161/161 co-relation queries the response was YES. [2023-11-19 07:42:00,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3491 conditions, 1600 events. 987/1600 cut-off events. For 161/161 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 6546 event pairs, 449 based on Foata normal form. 0/1334 useless extension candidates. Maximal degree in co-relation 3218. Up to 1301 conditions per place. [2023-11-19 07:42:00,862 INFO L140 encePairwiseOnDemand]: 317/320 looper letters, 50 selfloop transitions, 2 changer transitions 3/55 dead transitions. [2023-11-19 07:42:00,862 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 55 transitions, 255 flow [2023-11-19 07:42:00,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:42:00,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:42:00,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 521 transitions. [2023-11-19 07:42:00,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5427083333333333 [2023-11-19 07:42:00,870 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 521 transitions. [2023-11-19 07:42:00,870 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 521 transitions. [2023-11-19 07:42:00,871 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:42:00,871 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 521 transitions. [2023-11-19 07:42:00,873 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 173.66666666666666) internal successors, (521), 3 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:42:00,876 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 320.0) internal successors, (1280), 4 states have internal predecessors, (1280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:42:00,877 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 320.0) internal successors, (1280), 4 states have internal predecessors, (1280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:42:00,878 INFO L175 Difference]: Start difference. First operand has 36 places, 36 transitions, 100 flow. Second operand 3 states and 521 transitions. [2023-11-19 07:42:00,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 55 transitions, 255 flow [2023-11-19 07:42:00,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 55 transitions, 245 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 07:42:00,882 INFO L231 Difference]: Finished difference. Result has 37 places, 37 transitions, 104 flow [2023-11-19 07:42:00,883 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=320, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=37, PETRI_TRANSITIONS=37} [2023-11-19 07:42:00,884 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 2 predicate places. [2023-11-19 07:42:00,884 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 37 transitions, 104 flow [2023-11-19 07:42:00,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 159.0) internal successors, (477), 3 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:42:00,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:42:00,886 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:42:00,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 07:42:00,886 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-19 07:42:00,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:42:00,888 INFO L85 PathProgramCache]: Analyzing trace with hash -1955638891, now seen corresponding path program 1 times [2023-11-19 07:42:00,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:42:00,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409953577] [2023-11-19 07:42:00,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:42:00,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:42:00,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:01,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:42:01,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:42:01,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409953577] [2023-11-19 07:42:01,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409953577] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:42:01,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:42:01,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:42:01,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255608673] [2023-11-19 07:42:01,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:42:01,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:42:01,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:42:01,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:42:01,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:42:01,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 320 [2023-11-19 07:42:01,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 37 transitions, 104 flow. Second operand has 3 states, 3 states have (on average 158.33333333333334) internal successors, (475), 3 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:42:01,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:42:01,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 320 [2023-11-19 07:42:01,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:42:01,304 INFO L124 PetriNetUnfolderBase]: 1043/1688 cut-off events. [2023-11-19 07:42:01,305 INFO L125 PetriNetUnfolderBase]: For 125/125 co-relation queries the response was YES. [2023-11-19 07:42:01,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3762 conditions, 1688 events. 1043/1688 cut-off events. For 125/125 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 7102 event pairs, 737 based on Foata normal form. 56/1572 useless extension candidates. Maximal degree in co-relation 3482. Up to 1543 conditions per place. [2023-11-19 07:42:01,318 INFO L140 encePairwiseOnDemand]: 317/320 looper letters, 53 selfloop transitions, 4 changer transitions 0/57 dead transitions. [2023-11-19 07:42:01,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 57 transitions, 272 flow [2023-11-19 07:42:01,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:42:01,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:42:01,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 517 transitions. [2023-11-19 07:42:01,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5385416666666667 [2023-11-19 07:42:01,321 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 517 transitions. [2023-11-19 07:42:01,321 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 517 transitions. [2023-11-19 07:42:01,322 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:42:01,322 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 517 transitions. [2023-11-19 07:42:01,324 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 172.33333333333334) internal successors, (517), 3 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:42:01,326 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 320.0) internal successors, (1280), 4 states have internal predecessors, (1280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:42:01,327 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 320.0) internal successors, (1280), 4 states have internal predecessors, (1280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:42:01,327 INFO L175 Difference]: Start difference. First operand has 37 places, 37 transitions, 104 flow. Second operand 3 states and 517 transitions. [2023-11-19 07:42:01,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 57 transitions, 272 flow [2023-11-19 07:42:01,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 57 transitions, 270 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:42:01,330 INFO L231 Difference]: Finished difference. Result has 39 places, 38 transitions, 122 flow [2023-11-19 07:42:01,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=320, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=122, PETRI_PLACES=39, PETRI_TRANSITIONS=38} [2023-11-19 07:42:01,331 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 4 predicate places. [2023-11-19 07:42:01,333 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 38 transitions, 122 flow [2023-11-19 07:42:01,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 158.33333333333334) internal successors, (475), 3 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:42:01,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:42:01,334 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:42:01,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 07:42:01,335 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-19 07:42:01,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:42:01,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1158974715, now seen corresponding path program 1 times [2023-11-19 07:42:01,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:42:01,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774622341] [2023-11-19 07:42:01,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:42:01,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:42:01,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:01,506 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:42:01,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:42:01,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774622341] [2023-11-19 07:42:01,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774622341] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:42:01,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531088381] [2023-11-19 07:42:01,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:42:01,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:42:01,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98e7cee5-6515-415b-a93f-d7c128636875/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:42:01,513 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98e7cee5-6515-415b-a93f-d7c128636875/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:42:01,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98e7cee5-6515-415b-a93f-d7c128636875/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:42:01,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:01,655 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 07:42:01,661 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:42:01,762 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:42:01,763 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:42:01,822 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:42:01,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531088381] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:42:01,823 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:42:01,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2023-11-19 07:42:01,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351738085] [2023-11-19 07:42:01,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:42:01,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-19 07:42:01,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:42:01,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-19 07:42:01,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-19 07:42:01,892 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 320 [2023-11-19 07:42:01,896 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 38 transitions, 122 flow. Second operand has 10 states, 10 states have (on average 154.6) internal successors, (1546), 10 states have internal predecessors, (1546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:42:01,896 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:42:01,896 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 320 [2023-11-19 07:42:01,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:42:02,693 INFO L124 PetriNetUnfolderBase]: 1986/3223 cut-off events. [2023-11-19 07:42:02,693 INFO L125 PetriNetUnfolderBase]: For 1186/1186 co-relation queries the response was YES. [2023-11-19 07:42:02,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7663 conditions, 3223 events. 1986/3223 cut-off events. For 1186/1186 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 15015 event pairs, 399 based on Foata normal form. 52/2955 useless extension candidates. Maximal degree in co-relation 7184. Up to 909 conditions per place. [2023-11-19 07:42:02,721 INFO L140 encePairwiseOnDemand]: 314/320 looper letters, 173 selfloop transitions, 22 changer transitions 0/195 dead transitions. [2023-11-19 07:42:02,721 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 195 transitions, 934 flow [2023-11-19 07:42:02,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-19 07:42:02,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-19 07:42:02,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1704 transitions. [2023-11-19 07:42:02,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5325 [2023-11-19 07:42:02,728 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1704 transitions. [2023-11-19 07:42:02,728 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1704 transitions. [2023-11-19 07:42:02,730 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:42:02,730 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1704 transitions. [2023-11-19 07:42:02,736 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 170.4) internal successors, (1704), 10 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:42:02,744 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 320.0) internal successors, (3520), 11 states have internal predecessors, (3520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:42:02,747 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 320.0) internal successors, (3520), 11 states have internal predecessors, (3520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:42:02,747 INFO L175 Difference]: Start difference. First operand has 39 places, 38 transitions, 122 flow. Second operand 10 states and 1704 transitions. [2023-11-19 07:42:02,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 195 transitions, 934 flow [2023-11-19 07:42:02,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 195 transitions, 921 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:42:02,762 INFO L231 Difference]: Finished difference. Result has 51 places, 56 transitions, 280 flow [2023-11-19 07:42:02,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=320, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=280, PETRI_PLACES=51, PETRI_TRANSITIONS=56} [2023-11-19 07:42:02,765 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 16 predicate places. [2023-11-19 07:42:02,765 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 56 transitions, 280 flow [2023-11-19 07:42:02,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 154.6) internal successors, (1546), 10 states have internal predecessors, (1546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:42:02,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:42:02,768 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:42:02,799 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98e7cee5-6515-415b-a93f-d7c128636875/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 07:42:02,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98e7cee5-6515-415b-a93f-d7c128636875/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:42:02,990 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-19 07:42:02,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:42:02,991 INFO L85 PathProgramCache]: Analyzing trace with hash -1889089159, now seen corresponding path program 1 times [2023-11-19 07:42:02,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:42:02,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329963339] [2023-11-19 07:42:02,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:42:02,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:42:03,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:03,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:42:03,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:42:03,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329963339] [2023-11-19 07:42:03,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329963339] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:42:03,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:42:03,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:42:03,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594152737] [2023-11-19 07:42:03,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:42:03,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:42:03,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:42:03,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:42:03,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:42:03,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 320 [2023-11-19 07:42:03,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 56 transitions, 280 flow. Second operand has 3 states, 3 states have (on average 158.66666666666666) internal successors, (476), 3 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:42:03,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:42:03,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 320 [2023-11-19 07:42:03,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:42:03,430 INFO L124 PetriNetUnfolderBase]: 646/1175 cut-off events. [2023-11-19 07:42:03,431 INFO L125 PetriNetUnfolderBase]: For 307/307 co-relation queries the response was YES. [2023-11-19 07:42:03,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2894 conditions, 1175 events. 646/1175 cut-off events. For 307/307 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 4867 event pairs, 98 based on Foata normal form. 0/1095 useless extension candidates. Maximal degree in co-relation 2384. Up to 926 conditions per place. [2023-11-19 07:42:03,441 INFO L140 encePairwiseOnDemand]: 315/320 looper letters, 50 selfloop transitions, 5 changer transitions 0/55 dead transitions. [2023-11-19 07:42:03,441 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 55 transitions, 337 flow [2023-11-19 07:42:03,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:42:03,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:42:03,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 503 transitions. [2023-11-19 07:42:03,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5239583333333333 [2023-11-19 07:42:03,445 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 503 transitions. [2023-11-19 07:42:03,445 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 503 transitions. [2023-11-19 07:42:03,445 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:42:03,446 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 503 transitions. [2023-11-19 07:42:03,447 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 167.66666666666666) internal successors, (503), 3 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:42:03,450 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 320.0) internal successors, (1280), 4 states have internal predecessors, (1280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:42:03,451 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 320.0) internal successors, (1280), 4 states have internal predecessors, (1280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:42:03,451 INFO L175 Difference]: Start difference. First operand has 51 places, 56 transitions, 280 flow. Second operand 3 states and 503 transitions. [2023-11-19 07:42:03,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 55 transitions, 337 flow [2023-11-19 07:42:03,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 55 transitions, 325 flow, removed 5 selfloop flow, removed 1 redundant places. [2023-11-19 07:42:03,457 INFO L231 Difference]: Finished difference. Result has 49 places, 46 transitions, 204 flow [2023-11-19 07:42:03,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=320, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=204, PETRI_PLACES=49, PETRI_TRANSITIONS=46} [2023-11-19 07:42:03,461 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 14 predicate places. [2023-11-19 07:42:03,461 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 46 transitions, 204 flow [2023-11-19 07:42:03,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 158.66666666666666) internal successors, (476), 3 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:42:03,462 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:42:03,462 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:42:03,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 07:42:03,462 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-19 07:42:03,463 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:42:03,463 INFO L85 PathProgramCache]: Analyzing trace with hash 2052968563, now seen corresponding path program 1 times [2023-11-19 07:42:03,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:42:03,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880488101] [2023-11-19 07:42:03,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:42:03,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:42:03,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:03,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:42:03,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:42:03,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880488101] [2023-11-19 07:42:03,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880488101] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:42:03,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:42:03,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 07:42:03,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603782108] [2023-11-19 07:42:03,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:42:03,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:42:03,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:42:03,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:42:03,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:42:03,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 320 [2023-11-19 07:42:03,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 46 transitions, 204 flow. Second operand has 5 states, 5 states have (on average 154.6) internal successors, (773), 5 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:42:03,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:42:03,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 320 [2023-11-19 07:42:03,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:42:03,967 INFO L124 PetriNetUnfolderBase]: 766/1395 cut-off events. [2023-11-19 07:42:03,968 INFO L125 PetriNetUnfolderBase]: For 396/396 co-relation queries the response was YES. [2023-11-19 07:42:03,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3542 conditions, 1395 events. 766/1395 cut-off events. For 396/396 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 5810 event pairs, 234 based on Foata normal form. 12/1407 useless extension candidates. Maximal degree in co-relation 2916. Up to 553 conditions per place. [2023-11-19 07:42:03,980 INFO L140 encePairwiseOnDemand]: 314/320 looper letters, 83 selfloop transitions, 11 changer transitions 0/94 dead transitions. [2023-11-19 07:42:03,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 94 transitions, 536 flow [2023-11-19 07:42:03,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:42:03,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 07:42:03,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 842 transitions. [2023-11-19 07:42:03,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.52625 [2023-11-19 07:42:03,985 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 842 transitions. [2023-11-19 07:42:03,985 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 842 transitions. [2023-11-19 07:42:03,986 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:42:03,986 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 842 transitions. [2023-11-19 07:42:03,989 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 168.4) internal successors, (842), 5 states have internal predecessors, (842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:42:03,992 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 320.0) internal successors, (1920), 6 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:42:03,995 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 320.0) internal successors, (1920), 6 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:42:03,995 INFO L175 Difference]: Start difference. First operand has 49 places, 46 transitions, 204 flow. Second operand 5 states and 842 transitions. [2023-11-19 07:42:03,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 94 transitions, 536 flow [2023-11-19 07:42:03,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 94 transitions, 523 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:42:04,001 INFO L231 Difference]: Finished difference. Result has 54 places, 48 transitions, 258 flow [2023-11-19 07:42:04,002 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=320, PETRI_DIFFERENCE_MINUEND_FLOW=191, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=258, PETRI_PLACES=54, PETRI_TRANSITIONS=48} [2023-11-19 07:42:04,002 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 19 predicate places. [2023-11-19 07:42:04,003 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 48 transitions, 258 flow [2023-11-19 07:42:04,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 154.6) internal successors, (773), 5 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:42:04,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:42:04,004 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] [2023-11-19 07:42:04,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 07:42:04,004 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-19 07:42:04,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:42:04,005 INFO L85 PathProgramCache]: Analyzing trace with hash 250007796, now seen corresponding path program 1 times [2023-11-19 07:42:04,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:42:04,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090962244] [2023-11-19 07:42:04,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:42:04,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:42:04,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:05,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:42:05,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:42:05,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090962244] [2023-11-19 07:42:05,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090962244] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:42:05,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:42:05,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-11-19 07:42:05,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401241148] [2023-11-19 07:42:05,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:42:05,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-19 07:42:05,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:42:05,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-19 07:42:05,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2023-11-19 07:42:07,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 320 [2023-11-19 07:42:07,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 48 transitions, 258 flow. Second operand has 15 states, 15 states have (on average 124.46666666666667) internal successors, (1867), 15 states have internal predecessors, (1867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:42:07,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:42:07,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 320 [2023-11-19 07:42:07,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:42:08,575 INFO L124 PetriNetUnfolderBase]: 1146/2094 cut-off events. [2023-11-19 07:42:08,576 INFO L125 PetriNetUnfolderBase]: For 1193/1193 co-relation queries the response was YES. [2023-11-19 07:42:08,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5356 conditions, 2094 events. 1146/2094 cut-off events. For 1193/1193 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 9975 event pairs, 294 based on Foata normal form. 14/2090 useless extension candidates. Maximal degree in co-relation 3166. Up to 1230 conditions per place. [2023-11-19 07:42:08,595 INFO L140 encePairwiseOnDemand]: 302/320 looper letters, 135 selfloop transitions, 31 changer transitions 3/169 dead transitions. [2023-11-19 07:42:08,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 169 transitions, 968 flow [2023-11-19 07:42:08,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-19 07:42:08,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-19 07:42:08,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2366 transitions. [2023-11-19 07:42:08,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107638888888889 [2023-11-19 07:42:08,609 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2366 transitions. [2023-11-19 07:42:08,609 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2366 transitions. [2023-11-19 07:42:08,611 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:42:08,611 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2366 transitions. [2023-11-19 07:42:08,620 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 131.44444444444446) internal successors, (2366), 18 states have internal predecessors, (2366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:42:08,633 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 320.0) internal successors, (6080), 19 states have internal predecessors, (6080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:42:08,637 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 320.0) internal successors, (6080), 19 states have internal predecessors, (6080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:42:08,637 INFO L175 Difference]: Start difference. First operand has 54 places, 48 transitions, 258 flow. Second operand 18 states and 2366 transitions. [2023-11-19 07:42:08,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 169 transitions, 968 flow [2023-11-19 07:42:08,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 169 transitions, 949 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-11-19 07:42:08,648 INFO L231 Difference]: Finished difference. Result has 83 places, 78 transitions, 537 flow [2023-11-19 07:42:08,648 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=320, PETRI_DIFFERENCE_MINUEND_FLOW=247, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=537, PETRI_PLACES=83, PETRI_TRANSITIONS=78} [2023-11-19 07:42:08,649 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 48 predicate places. [2023-11-19 07:42:08,649 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 78 transitions, 537 flow [2023-11-19 07:42:08,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 124.46666666666667) internal successors, (1867), 15 states have internal predecessors, (1867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:42:08,652 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:42:08,653 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] [2023-11-19 07:42:08,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-19 07:42:08,653 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-19 07:42:08,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:42:08,654 INFO L85 PathProgramCache]: Analyzing trace with hash -1879347030, now seen corresponding path program 2 times [2023-11-19 07:42:08,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:42:08,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490611631] [2023-11-19 07:42:08,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:42:08,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:42:08,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:09,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:42:09,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:42:09,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490611631] [2023-11-19 07:42:09,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490611631] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:42:09,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:42:09,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-11-19 07:42:09,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850015525] [2023-11-19 07:42:09,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:42:09,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-19 07:42:09,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:42:09,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-19 07:42:09,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2023-11-19 07:42:12,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 320 [2023-11-19 07:42:12,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 78 transitions, 537 flow. Second operand has 16 states, 16 states have (on average 120.375) internal successors, (1926), 16 states have internal predecessors, (1926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:42:12,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:42:12,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 320 [2023-11-19 07:42:12,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:42:13,629 INFO L124 PetriNetUnfolderBase]: 1656/3023 cut-off events. [2023-11-19 07:42:13,630 INFO L125 PetriNetUnfolderBase]: For 2650/2650 co-relation queries the response was YES. [2023-11-19 07:42:13,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8977 conditions, 3023 events. 1656/3023 cut-off events. For 2650/2650 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 14830 event pairs, 484 based on Foata normal form. 4/2997 useless extension candidates. Maximal degree in co-relation 5464. Up to 1862 conditions per place. [2023-11-19 07:42:13,664 INFO L140 encePairwiseOnDemand]: 303/320 looper letters, 154 selfloop transitions, 36 changer transitions 3/193 dead transitions. [2023-11-19 07:42:13,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 193 transitions, 1399 flow [2023-11-19 07:42:13,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-19 07:42:13,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-19 07:42:13,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1924 transitions. [2023-11-19 07:42:13,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4008333333333333 [2023-11-19 07:42:13,674 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1924 transitions. [2023-11-19 07:42:13,674 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1924 transitions. [2023-11-19 07:42:13,676 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:42:13,676 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1924 transitions. [2023-11-19 07:42:13,743 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 128.26666666666668) internal successors, (1924), 15 states have internal predecessors, (1924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:42:13,752 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 320.0) internal successors, (5120), 16 states have internal predecessors, (5120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:42:13,754 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 320.0) internal successors, (5120), 16 states have internal predecessors, (5120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:42:13,754 INFO L175 Difference]: Start difference. First operand has 83 places, 78 transitions, 537 flow. Second operand 15 states and 1924 transitions. [2023-11-19 07:42:13,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 193 transitions, 1399 flow [2023-11-19 07:42:13,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 193 transitions, 1379 flow, removed 10 selfloop flow, removed 0 redundant places. [2023-11-19 07:42:13,774 INFO L231 Difference]: Finished difference. Result has 109 places, 107 transitions, 915 flow [2023-11-19 07:42:13,775 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=320, PETRI_DIFFERENCE_MINUEND_FLOW=523, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=915, PETRI_PLACES=109, PETRI_TRANSITIONS=107} [2023-11-19 07:42:13,777 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 74 predicate places. [2023-11-19 07:42:13,778 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 107 transitions, 915 flow [2023-11-19 07:42:13,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 120.375) internal successors, (1926), 16 states have internal predecessors, (1926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:42:13,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:42:13,779 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] [2023-11-19 07:42:13,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-19 07:42:13,780 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-19 07:42:13,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:42:13,781 INFO L85 PathProgramCache]: Analyzing trace with hash 593129738, now seen corresponding path program 3 times [2023-11-19 07:42:13,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:42:13,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589754856] [2023-11-19 07:42:13,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:42:13,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:42:13,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:15,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:42:15,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:42:15,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589754856] [2023-11-19 07:42:15,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589754856] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:42:15,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:42:15,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-11-19 07:42:15,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074795810] [2023-11-19 07:42:15,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:42:15,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-19 07:42:15,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:42:15,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-19 07:42:15,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2023-11-19 07:42:17,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 320 [2023-11-19 07:42:17,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 107 transitions, 915 flow. Second operand has 16 states, 16 states have (on average 120.375) internal successors, (1926), 16 states have internal predecessors, (1926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:42:17,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:42:17,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 320 [2023-11-19 07:42:17,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:42:18,957 INFO L124 PetriNetUnfolderBase]: 1986/3631 cut-off events. [2023-11-19 07:42:18,958 INFO L125 PetriNetUnfolderBase]: For 4626/4626 co-relation queries the response was YES. [2023-11-19 07:42:18,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11696 conditions, 3631 events. 1986/3631 cut-off events. For 4626/4626 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 18712 event pairs, 320 based on Foata normal form. 14/3609 useless extension candidates. Maximal degree in co-relation 8288. Up to 1213 conditions per place. [2023-11-19 07:42:18,986 INFO L140 encePairwiseOnDemand]: 303/320 looper letters, 138 selfloop transitions, 73 changer transitions 3/214 dead transitions. [2023-11-19 07:42:18,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 214 transitions, 1764 flow [2023-11-19 07:42:18,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-19 07:42:18,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-19 07:42:18,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2412 transitions. [2023-11-19 07:42:18,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39671052631578946 [2023-11-19 07:42:18,997 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2412 transitions. [2023-11-19 07:42:18,997 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2412 transitions. [2023-11-19 07:42:18,999 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:42:18,999 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2412 transitions. [2023-11-19 07:42:19,006 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 126.94736842105263) internal successors, (2412), 19 states have internal predecessors, (2412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:42:19,018 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 320.0) internal successors, (6400), 20 states have internal predecessors, (6400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:42:19,022 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 320.0) internal successors, (6400), 20 states have internal predecessors, (6400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:42:19,022 INFO L175 Difference]: Start difference. First operand has 109 places, 107 transitions, 915 flow. Second operand 19 states and 2412 transitions. [2023-11-19 07:42:19,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 214 transitions, 1764 flow [2023-11-19 07:42:19,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 214 transitions, 1758 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-11-19 07:42:19,057 INFO L231 Difference]: Finished difference. Result has 138 places, 126 transitions, 1367 flow [2023-11-19 07:42:19,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=320, PETRI_DIFFERENCE_MINUEND_FLOW=909, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1367, PETRI_PLACES=138, PETRI_TRANSITIONS=126} [2023-11-19 07:42:19,058 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 103 predicate places. [2023-11-19 07:42:19,058 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 126 transitions, 1367 flow [2023-11-19 07:42:19,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 120.375) internal successors, (1926), 16 states have internal predecessors, (1926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:42:19,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:42:19,060 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:42:19,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-19 07:42:19,060 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-19 07:42:19,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:42:19,061 INFO L85 PathProgramCache]: Analyzing trace with hash 62648725, now seen corresponding path program 2 times [2023-11-19 07:42:19,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:42:19,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715245702] [2023-11-19 07:42:19,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:42:19,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:42:19,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:19,246 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:42:19,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:42:19,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715245702] [2023-11-19 07:42:19,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715245702] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:42:19,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360414850] [2023-11-19 07:42:19,247 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:42:19,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:42:19,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98e7cee5-6515-415b-a93f-d7c128636875/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:42:19,248 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98e7cee5-6515-415b-a93f-d7c128636875/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:42:19,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98e7cee5-6515-415b-a93f-d7c128636875/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:42:19,395 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:42:19,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:42:19,397 INFO L262 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 07:42:19,400 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:42:19,458 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:42:19,459 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:42:19,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360414850] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:42:19,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:42:19,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 9 [2023-11-19 07:42:19,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816854950] [2023-11-19 07:42:19,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:42:19,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 07:42:19,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:42:19,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 07:42:19,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-11-19 07:42:19,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 320 [2023-11-19 07:42:19,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 126 transitions, 1367 flow. Second operand has 7 states, 7 states have (on average 154.71428571428572) internal successors, (1083), 7 states have internal predecessors, (1083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:42:19,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:42:19,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 320 [2023-11-19 07:42:19,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:42:20,567 INFO L124 PetriNetUnfolderBase]: 2064/3779 cut-off events. [2023-11-19 07:42:20,567 INFO L125 PetriNetUnfolderBase]: For 8476/8476 co-relation queries the response was YES. [2023-11-19 07:42:20,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13809 conditions, 3779 events. 2064/3779 cut-off events. For 8476/8476 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 19394 event pairs, 785 based on Foata normal form. 12/3755 useless extension candidates. Maximal degree in co-relation 10231. Up to 1193 conditions per place. [2023-11-19 07:42:20,609 INFO L140 encePairwiseOnDemand]: 314/320 looper letters, 185 selfloop transitions, 32 changer transitions 0/217 dead transitions. [2023-11-19 07:42:20,609 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 217 transitions, 2370 flow [2023-11-19 07:42:20,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 07:42:20,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-19 07:42:20,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1325 transitions. [2023-11-19 07:42:20,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.517578125 [2023-11-19 07:42:20,615 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1325 transitions. [2023-11-19 07:42:20,615 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1325 transitions. [2023-11-19 07:42:20,616 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:42:20,616 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1325 transitions. [2023-11-19 07:42:20,620 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 165.625) internal successors, (1325), 8 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:42:20,625 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 320.0) internal successors, (2880), 9 states have internal predecessors, (2880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:42:20,626 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 320.0) internal successors, (2880), 9 states have internal predecessors, (2880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:42:20,626 INFO L175 Difference]: Start difference. First operand has 138 places, 126 transitions, 1367 flow. Second operand 8 states and 1325 transitions. [2023-11-19 07:42:20,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 217 transitions, 2370 flow [2023-11-19 07:42:20,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 217 transitions, 2200 flow, removed 68 selfloop flow, removed 8 redundant places. [2023-11-19 07:42:20,681 INFO L231 Difference]: Finished difference. Result has 140 places, 129 transitions, 1412 flow [2023-11-19 07:42:20,681 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=320, PETRI_DIFFERENCE_MINUEND_FLOW=1251, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1412, PETRI_PLACES=140, PETRI_TRANSITIONS=129} [2023-11-19 07:42:20,682 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 105 predicate places. [2023-11-19 07:42:20,682 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 129 transitions, 1412 flow [2023-11-19 07:42:20,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 154.71428571428572) internal successors, (1083), 7 states have internal predecessors, (1083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:42:20,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:42:20,683 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:42:20,754 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98e7cee5-6515-415b-a93f-d7c128636875/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:42:20,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98e7cee5-6515-415b-a93f-d7c128636875/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-19 07:42:20,896 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-19 07:42:20,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:42:20,897 INFO L85 PathProgramCache]: Analyzing trace with hash -1352033986, now seen corresponding path program 1 times [2023-11-19 07:42:20,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:42:20,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426672336] [2023-11-19 07:42:20,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:42:20,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:42:20,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:42:20,930 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:42:20,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:42:20,996 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:42:20,997 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-19 07:42:20,998 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 6 remaining) [2023-11-19 07:42:21,000 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 6 remaining) [2023-11-19 07:42:21,000 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 6 remaining) [2023-11-19 07:42:21,001 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-11-19 07:42:21,001 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-11-19 07:42:21,002 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-11-19 07:42:21,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-19 07:42:21,002 INFO L445 BasicCegarLoop]: Path program histogram: [3, 2, 1, 1, 1, 1, 1, 1] [2023-11-19 07:42:21,011 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-11-19 07:42:21,011 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-19 07:42:21,078 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~pre46 could not be translated [2023-11-19 07:42:21,079 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~pre48 could not be translated [2023-11-19 07:42:21,102 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.11 07:42:21 BasicIcfg [2023-11-19 07:42:21,102 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-19 07:42:21,103 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-19 07:42:21,103 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-19 07:42:21,103 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-19 07:42:21,104 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:41:53" (3/4) ... [2023-11-19 07:42:21,105 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2023-11-19 07:42:21,135 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~pre46 could not be translated [2023-11-19 07:42:21,136 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~pre48 could not be translated [2023-11-19 07:42:21,196 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98e7cee5-6515-415b-a93f-d7c128636875/bin/uautomizer-verify-uCwYo4JHxu/witness.graphml [2023-11-19 07:42:21,196 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-19 07:42:21,197 INFO L158 Benchmark]: Toolchain (without parser) took 29372.25ms. Allocated memory was 134.2MB in the beginning and 385.9MB in the end (delta: 251.7MB). Free memory was 65.4MB in the beginning and 136.6MB in the end (delta: -71.2MB). Peak memory consumption was 182.6MB. Max. memory is 16.1GB. [2023-11-19 07:42:21,197 INFO L158 Benchmark]: CDTParser took 0.30ms. Allocated memory is still 134.2MB. Free memory was 107.6MB in the beginning and 107.4MB in the end (delta: 146.9kB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-19 07:42:21,198 INFO L158 Benchmark]: CACSL2BoogieTranslator took 848.02ms. Allocated memory was 134.2MB in the beginning and 174.1MB in the end (delta: 39.8MB). Free memory was 65.1MB in the beginning and 119.4MB in the end (delta: -54.3MB). Peak memory consumption was 10.4MB. Max. memory is 16.1GB. [2023-11-19 07:42:21,198 INFO L158 Benchmark]: Boogie Procedure Inliner took 95.78ms. Allocated memory is still 174.1MB. Free memory was 119.4MB in the beginning and 116.1MB in the end (delta: 3.3MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-11-19 07:42:21,198 INFO L158 Benchmark]: Boogie Preprocessor took 40.34ms. Allocated memory is still 174.1MB. Free memory was 116.1MB in the beginning and 114.8MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-19 07:42:21,199 INFO L158 Benchmark]: RCFGBuilder took 746.97ms. Allocated memory is still 174.1MB. Free memory was 114.8MB in the beginning and 131.6MB in the end (delta: -16.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-11-19 07:42:21,199 INFO L158 Benchmark]: TraceAbstraction took 27535.38ms. Allocated memory was 174.1MB in the beginning and 385.9MB in the end (delta: 211.8MB). Free memory was 130.5MB in the beginning and 145.0MB in the end (delta: -14.5MB). Peak memory consumption was 199.4MB. Max. memory is 16.1GB. [2023-11-19 07:42:21,200 INFO L158 Benchmark]: Witness Printer took 93.28ms. Allocated memory is still 385.9MB. Free memory was 145.0MB in the beginning and 136.6MB in the end (delta: 8.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-11-19 07:42:21,203 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30ms. Allocated memory is still 134.2MB. Free memory was 107.6MB in the beginning and 107.4MB in the end (delta: 146.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 848.02ms. Allocated memory was 134.2MB in the beginning and 174.1MB in the end (delta: 39.8MB). Free memory was 65.1MB in the beginning and 119.4MB in the end (delta: -54.3MB). Peak memory consumption was 10.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 95.78ms. Allocated memory is still 174.1MB. Free memory was 119.4MB in the beginning and 116.1MB in the end (delta: 3.3MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 40.34ms. Allocated memory is still 174.1MB. Free memory was 116.1MB in the beginning and 114.8MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 746.97ms. Allocated memory is still 174.1MB. Free memory was 114.8MB in the beginning and 131.6MB in the end (delta: -16.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 27535.38ms. Allocated memory was 174.1MB in the beginning and 385.9MB in the end (delta: 211.8MB). Free memory was 130.5MB in the beginning and 145.0MB in the end (delta: -14.5MB). Peak memory consumption was 199.4MB. Max. memory is 16.1GB. * Witness Printer took 93.28ms. Allocated memory is still 385.9MB. Free memory was 145.0MB in the beginning and 136.6MB in the end (delta: 8.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~pre46 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~pre48 could not be translated - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~pre46 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~pre48 could not be translated - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 5.3s, 155 PlacesBefore, 35 PlacesAfterwards, 158 TransitionsBefore, 33 TransitionsAfterwards, 8340 CoEnabledTransitionPairs, 6 FixpointIterations, 29 TrivialSequentialCompositions, 94 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 22 ConcurrentYvCompositions, 5 ChoiceCompositions, 150 TotalNumberOfCompositions, 10668 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 7682, independent: 7495, independent conditional: 0, independent unconditional: 7495, dependent: 187, dependent conditional: 0, dependent unconditional: 187, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 4706, independent: 4650, independent conditional: 0, independent unconditional: 4650, dependent: 56, dependent conditional: 0, dependent unconditional: 56, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 7682, independent: 2845, independent conditional: 0, independent unconditional: 2845, dependent: 131, dependent conditional: 0, dependent unconditional: 131, unknown: 4706, unknown conditional: 0, unknown unconditional: 4706] , Statistics on independence cache: Total cache size (in pairs): 168, Positive cache size: 151, Positive conditional cache size: 0, Positive unconditional cache size: 151, Negative cache size: 17, Negative conditional cache size: 0, Negative unconditional cache size: 17, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - 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; [L936] 0 static unsigned int arr[(5)]; [L937] 0 pthread_mutex_t m; [L938] 0 _Bool flag=(0); [L1021] 0 pthread_t id1, id2; [L1023] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [arr={3:0}, flag=0, id1={7:0}, id2={6:0}, m={4:0}, top=0] [L990] 1 int i; [L991] 1 unsigned int tmp; [L992] 1 i=0 VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=0, i=0, m={4:0}, top=0] [L1024] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [arr={3:0}, flag=0, id1={7:0}, id2={6:0}, m={4:0}, top=0] [L992] COND TRUE 1 i<(5) [L995] 1 tmp = __VERIFIER_nondet_uint() [L996] CALL 1 assume_abort_if_not(tmp < (5)) [L23] COND FALSE 1 !(!cond) [L996] RET 1 assume_abort_if_not(tmp < (5)) [L997] CALL, EXPR 1 push(arr,tmp) [L1006] 2 int i; [L1007] 2 i=0 VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=0, i=0, m={4:0}, top=0] [L962] COND FALSE 1 !(top==(5)) [L969] CALL, EXPR 1 get_top() [L954] 1 return top; [L969] RET, EXPR 1 get_top() [L969] 1 stack[get_top()] = x [L970] CALL 1 inc_top() [L946] 1 top++ [L970] RET 1 inc_top() [L972] 1 return 0; [L997] RET, EXPR 1 push(arr,tmp) [L997] COND FALSE 1 !(push(arr,tmp)==(-1)) [L999] 1 flag=(1) VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=0, m={4:0}, tmp=0, top=1] [L992] 1 i++ VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=1, m={4:0}, tmp=0, top=1] [L1007] COND TRUE 2 i<(5) [L1010] COND TRUE 2 \read(flag) [L1012] CALL, EXPR 2 pop(arr) [L976] CALL, EXPR 2 get_top() [L954] 2 return top; [L976] RET, EXPR 2 get_top() [L976] COND FALSE 2 !(get_top()==0) [L983] CALL 2 dec_top() [L950] 2 top-- [L983] RET 2 dec_top() [L984] CALL, EXPR 2 get_top() [L954] 2 return top; [L984] RET, EXPR 2 get_top() [L984] EXPR 2 stack[get_top()] [L984] 2 return stack[get_top()]; [L1012] RET, EXPR 2 pop(arr) [L1012] COND FALSE 2 !(!(pop(arr)!=(-2))) [L1007] 2 i++ VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=1, m={4:0}, top=0] [L1007] COND TRUE 2 i<(5) [L1010] COND TRUE 2 \read(flag) [L1012] CALL, EXPR 2 pop(arr) [L976] CALL, EXPR 2 get_top() [L954] 2 return top; [L976] RET, EXPR 2 get_top() [L976] COND TRUE 2 get_top()==0 [L979] 2 return (-2); [L1012] RET, EXPR 2 pop(arr) [L1012] COND TRUE 2 !(pop(arr)!=(-2)) [L1013] CALL 2 error() [L941] 2 reach_error() VAL [arr={3:0}, flag=1, m={4:0}, top=0] - UnprovableResult [Line: 1024]: Unable to prove that petrification did provide enough thread instances (tool internal message) Unable to prove that petrification did provide enough thread instances (tool internal message) Reason: Not analyzed. - UnprovableResult [Line: 1023]: Unable to prove that petrification did provide enough thread instances (tool internal message) Unable to prove that petrification did provide enough thread instances (tool internal message) Reason: Not analyzed. - UnprovableResult [Line: 941]: Unable to prove that a call to reach_error is unreachable Unable to prove that a call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 270 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: 27.2s, OverallIterations: 11, TraceHistogramMax: 2, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 15.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 5.5s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2528 SdHoareTripleChecker+Valid, 9.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2219 mSDsluCounter, 5892 SdHoareTripleChecker+Invalid, 7.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 5867 mSDsCounter, 70 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 14398 IncrementalHoareTripleChecker+Invalid, 14468 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 70 mSolverCounterUnsat, 25 mSDtfsCounter, 14398 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 161 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 2.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1412occurred in iteration=10, InterpolantAutomatonStates: 87, 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, 0.4s SatisfiabilityAnalysisTime, 4.8s InterpolantComputationTime, 232 NumberOfCodeBlocks, 232 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 207 ConstructedInterpolants, 0 QuantifiedInterpolants, 1640 SizeOfPredicates, 5 NumberOfNonLiveVariables, 430 ConjunctsInSsa, 11 ConjunctsInUnsatCore, 13 InterpolantComputations, 9 PerfectInterpolantSequences, 13/25 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! [2023-11-19 07:42:21,245 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98e7cee5-6515-415b-a93f-d7c128636875/bin/uautomizer-verify-uCwYo4JHxu/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