./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-lit/sssc12_variant-pthread.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_41afead4-3982-47e7-8928-9ccedf6f9ef5/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41afead4-3982-47e7-8928-9ccedf6f9ef5/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_41afead4-3982-47e7-8928-9ccedf6f9ef5/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41afead4-3982-47e7-8928-9ccedf6f9ef5/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-lit/sssc12_variant-pthread.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41afead4-3982-47e7-8928-9ccedf6f9ef5/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_41afead4-3982-47e7-8928-9ccedf6f9ef5/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 0ff08c0361e0fdb1af5d85b333c023f31932563eeba591605f3b3b9ddd16afc8 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:48:44,874 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:48:44,980 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41afead4-3982-47e7-8928-9ccedf6f9ef5/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 07:48:44,986 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:48:44,987 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:48:45,022 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:48:45,026 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:48:45,027 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:48:45,027 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:48:45,032 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:48:45,033 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:48:45,033 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:48:45,034 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:48:45,035 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:48:45,036 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:48:45,036 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:48:45,036 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:48:45,037 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:48:45,037 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:48:45,038 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:48:45,038 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:48:45,039 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:48:45,039 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:48:45,040 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:48:45,040 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:48:45,041 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:48:45,041 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:48:45,042 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:48:45,042 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:48:45,043 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:48:45,044 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:48:45,044 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:48:45,044 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:48:45,045 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:48:45,045 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:48:45,045 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:48:45,045 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:48:45,045 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:48:45,046 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:48:45,046 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_41afead4-3982-47e7-8928-9ccedf6f9ef5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41afead4-3982-47e7-8928-9ccedf6f9ef5/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0ff08c0361e0fdb1af5d85b333c023f31932563eeba591605f3b3b9ddd16afc8 [2023-11-19 07:48:45,294 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:48:45,327 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:48:45,330 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:48:45,332 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:48:45,332 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:48:45,334 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41afead4-3982-47e7-8928-9ccedf6f9ef5/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/pthread-lit/sssc12_variant-pthread.i [2023-11-19 07:48:48,299 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:48:48,751 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:48:48,751 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41afead4-3982-47e7-8928-9ccedf6f9ef5/sv-benchmarks/c/pthread-lit/sssc12_variant-pthread.i [2023-11-19 07:48:48,776 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41afead4-3982-47e7-8928-9ccedf6f9ef5/bin/uautomizer-verify-uCwYo4JHxu/data/ecd2c95f4/115c6ae8af8c468987f5f44dbf2e984e/FLAG4cb78ed2c [2023-11-19 07:48:48,790 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41afead4-3982-47e7-8928-9ccedf6f9ef5/bin/uautomizer-verify-uCwYo4JHxu/data/ecd2c95f4/115c6ae8af8c468987f5f44dbf2e984e [2023-11-19 07:48:48,792 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:48:48,794 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:48:48,795 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:48:48,796 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:48:48,801 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:48:48,802 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:48:48" (1/1) ... [2023-11-19 07:48:48,803 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f003f70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:48, skipping insertion in model container [2023-11-19 07:48:48,803 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:48:48" (1/1) ... [2023-11-19 07:48:48,882 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:48:49,272 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-11-19 07:48:49,356 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_41afead4-3982-47e7-8928-9ccedf6f9ef5/sv-benchmarks/c/pthread-lit/sssc12_variant-pthread.i[47777,47790] [2023-11-19 07:48:49,379 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:48:49,391 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:48:49,450 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-11-19 07:48:49,469 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_41afead4-3982-47e7-8928-9ccedf6f9ef5/sv-benchmarks/c/pthread-lit/sssc12_variant-pthread.i[47777,47790] [2023-11-19 07:48:49,482 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:48:49,540 WARN L675 CHandler]: The function __builtin_bswap16 is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 07:48:49,548 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:48:49,549 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:49 WrapperNode [2023-11-19 07:48:49,549 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:48:49,550 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:48:49,550 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:48:49,551 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:48:49,558 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:49" (1/1) ... [2023-11-19 07:48:49,577 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:49" (1/1) ... [2023-11-19 07:48:49,601 INFO L138 Inliner]: procedures = 273, calls = 25, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 79 [2023-11-19 07:48:49,602 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:48:49,602 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:48:49,603 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:48:49,603 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:48:49,611 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:49" (1/1) ... [2023-11-19 07:48:49,612 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:49" (1/1) ... [2023-11-19 07:48:49,615 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:49" (1/1) ... [2023-11-19 07:48:49,616 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:49" (1/1) ... [2023-11-19 07:48:49,634 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:49" (1/1) ... [2023-11-19 07:48:49,638 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:49" (1/1) ... [2023-11-19 07:48:49,640 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:49" (1/1) ... [2023-11-19 07:48:49,641 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:49" (1/1) ... [2023-11-19 07:48:49,659 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:48:49,660 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:48:49,660 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:48:49,660 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:48:49,661 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:49" (1/1) ... [2023-11-19 07:48:49,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:48:49,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41afead4-3982-47e7-8928-9ccedf6f9ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:48:49,695 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41afead4-3982-47e7-8928-9ccedf6f9ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:48:49,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41afead4-3982-47e7-8928-9ccedf6f9ef5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:48:49,742 INFO L130 BoogieDeclarations]: Found specification of procedure thr [2023-11-19 07:48:49,743 INFO L138 BoogieDeclarations]: Found implementation of procedure thr [2023-11-19 07:48:49,743 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 07:48:49,743 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 07:48:49,743 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 07:48:49,743 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 07:48:49,744 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-19 07:48:49,744 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-19 07:48:49,746 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:48:49,746 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:48:49,747 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:48:49,747 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:48:49,749 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 07:48:49,925 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:48:49,927 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:48:50,145 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:48:50,154 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:48:50,154 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-19 07:48:50,158 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:48:50 BoogieIcfgContainer [2023-11-19 07:48:50,158 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:48:50,160 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:48:50,160 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:48:50,164 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:48:50,164 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:48:48" (1/3) ... [2023-11-19 07:48:50,165 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66a1b215 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:48:50, skipping insertion in model container [2023-11-19 07:48:50,165 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:49" (2/3) ... [2023-11-19 07:48:50,165 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66a1b215 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:48:50, skipping insertion in model container [2023-11-19 07:48:50,165 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:48:50" (3/3) ... [2023-11-19 07:48:50,167 INFO L112 eAbstractionObserver]: Analyzing ICFG sssc12_variant-pthread.i [2023-11-19 07:48:50,175 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-19 07:48:50,185 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:48:50,186 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 07:48:50,186 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 07:48:50,234 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-19 07:48:50,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 85 places, 88 transitions, 180 flow [2023-11-19 07:48:50,319 INFO L124 PetriNetUnfolderBase]: 7/101 cut-off events. [2023-11-19 07:48:50,319 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:48:50,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105 conditions, 101 events. 7/101 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 92 event pairs, 0 based on Foata normal form. 0/91 useless extension candidates. Maximal degree in co-relation 51. Up to 4 conditions per place. [2023-11-19 07:48:50,325 INFO L82 GeneralOperation]: Start removeDead. Operand has 85 places, 88 transitions, 180 flow [2023-11-19 07:48:50,330 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 85 places, 88 transitions, 180 flow [2023-11-19 07:48:50,333 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:48:50,343 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 85 places, 88 transitions, 180 flow [2023-11-19 07:48:50,346 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 85 places, 88 transitions, 180 flow [2023-11-19 07:48:50,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 85 places, 88 transitions, 180 flow [2023-11-19 07:48:50,376 INFO L124 PetriNetUnfolderBase]: 7/101 cut-off events. [2023-11-19 07:48:50,376 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:48:50,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105 conditions, 101 events. 7/101 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 92 event pairs, 0 based on Foata normal form. 0/91 useless extension candidates. Maximal degree in co-relation 51. Up to 4 conditions per place. [2023-11-19 07:48:50,379 INFO L119 LiptonReduction]: Number of co-enabled transitions 1056 [2023-11-19 07:48:54,144 INFO L134 LiptonReduction]: Checked pairs total: 1194 [2023-11-19 07:48:54,144 INFO L136 LiptonReduction]: Total number of compositions: 93 [2023-11-19 07:48:54,173 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:48:54,182 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;@71203048, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:48:54,182 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-19 07:48:54,190 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:48:54,190 INFO L124 PetriNetUnfolderBase]: 1/11 cut-off events. [2023-11-19 07:48:54,190 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:48:54,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:48:54,191 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-19 07:48:54,191 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:48:54,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:48:54,196 INFO L85 PathProgramCache]: Analyzing trace with hash -2129505525, now seen corresponding path program 1 times [2023-11-19 07:48:54,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:48:54,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040504702] [2023-11-19 07:48:54,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:54,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:48:54,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:48:54,326 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:48:54,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:48:54,378 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:48:54,380 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-19 07:48:54,381 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-11-19 07:48:54,383 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-11-19 07:48:54,383 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-11-19 07:48:54,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:48:54,384 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-11-19 07:48:54,398 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-19 07:48:54,398 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-19 07:48:54,430 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-19 07:48:54,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 117 places, 122 transitions, 254 flow [2023-11-19 07:48:54,469 INFO L124 PetriNetUnfolderBase]: 12/150 cut-off events. [2023-11-19 07:48:54,470 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 07:48:54,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 158 conditions, 150 events. 12/150 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 279 event pairs, 0 based on Foata normal form. 0/133 useless extension candidates. Maximal degree in co-relation 102. Up to 6 conditions per place. [2023-11-19 07:48:54,472 INFO L82 GeneralOperation]: Start removeDead. Operand has 117 places, 122 transitions, 254 flow [2023-11-19 07:48:54,474 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 117 places, 122 transitions, 254 flow [2023-11-19 07:48:54,474 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:48:54,475 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 117 places, 122 transitions, 254 flow [2023-11-19 07:48:54,475 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 117 places, 122 transitions, 254 flow [2023-11-19 07:48:54,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 117 places, 122 transitions, 254 flow [2023-11-19 07:48:54,507 INFO L124 PetriNetUnfolderBase]: 12/150 cut-off events. [2023-11-19 07:48:54,507 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 07:48:54,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 158 conditions, 150 events. 12/150 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 279 event pairs, 0 based on Foata normal form. 0/133 useless extension candidates. Maximal degree in co-relation 102. Up to 6 conditions per place. [2023-11-19 07:48:54,513 INFO L119 LiptonReduction]: Number of co-enabled transitions 4356 [2023-11-19 07:48:58,268 INFO L134 LiptonReduction]: Checked pairs total: 10150 [2023-11-19 07:48:58,268 INFO L136 LiptonReduction]: Total number of compositions: 111 [2023-11-19 07:48:58,270 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:48:58,271 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;@71203048, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:48:58,271 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-19 07:48:58,280 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:48:58,280 INFO L124 PetriNetUnfolderBase]: 2/25 cut-off events. [2023-11-19 07:48:58,280 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-19 07:48:58,280 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:48:58,281 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:48:58,282 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-19 07:48:58,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:48:58,282 INFO L85 PathProgramCache]: Analyzing trace with hash 853983163, now seen corresponding path program 1 times [2023-11-19 07:48:58,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:48:58,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440045540] [2023-11-19 07:48:58,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:58,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:48:58,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:58,515 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 07:48:58,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:48:58,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440045540] [2023-11-19 07:48:58,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440045540] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:48:58,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:48:58,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:48:58,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498444183] [2023-11-19 07:48:58,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:48:58,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:48:58,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:48:58,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:48:58,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:48:58,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 233 [2023-11-19 07:48:58,607 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 32 transitions, 74 flow. Second operand has 3 states, 3 states have (on average 107.0) internal successors, (321), 3 states have internal predecessors, (321), 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 07:48:58,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:48:58,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 233 [2023-11-19 07:48:58,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:48:58,755 INFO L124 PetriNetUnfolderBase]: 186/426 cut-off events. [2023-11-19 07:48:58,756 INFO L125 PetriNetUnfolderBase]: For 24/24 co-relation queries the response was YES. [2023-11-19 07:48:58,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 742 conditions, 426 events. 186/426 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2256 event pairs, 92 based on Foata normal form. 0/319 useless extension candidates. Maximal degree in co-relation 402. Up to 217 conditions per place. [2023-11-19 07:48:58,763 INFO L140 encePairwiseOnDemand]: 229/233 looper letters, 22 selfloop transitions, 2 changer transitions 0/39 dead transitions. [2023-11-19 07:48:58,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 39 transitions, 141 flow [2023-11-19 07:48:58,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:48:58,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:48:58,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 342 transitions. [2023-11-19 07:48:58,783 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4892703862660944 [2023-11-19 07:48:58,784 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 342 transitions. [2023-11-19 07:48:58,784 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 342 transitions. [2023-11-19 07:48:58,786 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:48:58,789 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 342 transitions. [2023-11-19 07:48:58,817 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:58,823 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 233.0) internal successors, (932), 4 states have internal predecessors, (932), 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 07:48:58,825 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 233.0) internal successors, (932), 4 states have internal predecessors, (932), 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 07:48:58,827 INFO L175 Difference]: Start difference. First operand has 33 places, 32 transitions, 74 flow. Second operand 3 states and 342 transitions. [2023-11-19 07:48:58,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 39 transitions, 141 flow [2023-11-19 07:48:58,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 39 transitions, 141 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-19 07:48:58,833 INFO L231 Difference]: Finished difference. Result has 35 places, 31 transitions, 80 flow [2023-11-19 07:48:58,835 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=233, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=80, PETRI_PLACES=35, PETRI_TRANSITIONS=31} [2023-11-19 07:48:58,839 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 2 predicate places. [2023-11-19 07:48:58,840 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 31 transitions, 80 flow [2023-11-19 07:48:58,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 107.0) internal successors, (321), 3 states have internal predecessors, (321), 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 07:48:58,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:48:58,841 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-11-19 07:48:58,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 07:48:58,842 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-19 07:48:58,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:48:58,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1108674860, now seen corresponding path program 1 times [2023-11-19 07:48:58,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:48:58,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38277305] [2023-11-19 07:48:58,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:58,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:48:58,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:48:58,875 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:48:58,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:48:58,898 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:48:58,898 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-19 07:48:58,898 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-11-19 07:48:58,899 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-11-19 07:48:58,899 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-11-19 07:48:58,899 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-11-19 07:48:58,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 07:48:58,900 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-19 07:48:58,901 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-19 07:48:58,901 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-19 07:48:58,948 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-19 07:48:58,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 149 places, 156 transitions, 330 flow [2023-11-19 07:48:59,007 INFO L124 PetriNetUnfolderBase]: 17/199 cut-off events. [2023-11-19 07:48:59,008 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-19 07:48:59,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 212 conditions, 199 events. 17/199 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 477 event pairs, 0 based on Foata normal form. 0/175 useless extension candidates. Maximal degree in co-relation 154. Up to 8 conditions per place. [2023-11-19 07:48:59,010 INFO L82 GeneralOperation]: Start removeDead. Operand has 149 places, 156 transitions, 330 flow [2023-11-19 07:48:59,013 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 149 places, 156 transitions, 330 flow [2023-11-19 07:48:59,014 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:48:59,014 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 149 places, 156 transitions, 330 flow [2023-11-19 07:48:59,014 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 149 places, 156 transitions, 330 flow [2023-11-19 07:48:59,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 149 places, 156 transitions, 330 flow [2023-11-19 07:48:59,050 INFO L124 PetriNetUnfolderBase]: 17/199 cut-off events. [2023-11-19 07:48:59,051 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-19 07:48:59,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 212 conditions, 199 events. 17/199 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 477 event pairs, 0 based on Foata normal form. 0/175 useless extension candidates. Maximal degree in co-relation 154. Up to 8 conditions per place. [2023-11-19 07:48:59,062 INFO L119 LiptonReduction]: Number of co-enabled transitions 9900 [2023-11-19 07:49:03,404 INFO L134 LiptonReduction]: Checked pairs total: 25443 [2023-11-19 07:49:03,405 INFO L136 LiptonReduction]: Total number of compositions: 144 [2023-11-19 07:49:03,407 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:49:03,408 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;@71203048, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:49:03,408 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-19 07:49:03,413 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:49:03,413 INFO L124 PetriNetUnfolderBase]: 3/26 cut-off events. [2023-11-19 07:49:03,413 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-19 07:49:03,413 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:49:03,413 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:49:03,414 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-19 07:49:03,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:49:03,414 INFO L85 PathProgramCache]: Analyzing trace with hash 1710030192, now seen corresponding path program 1 times [2023-11-19 07:49:03,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:49:03,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497210193] [2023-11-19 07:49:03,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:49:03,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:49:03,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:49:03,582 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 07:49:03,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:49:03,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497210193] [2023-11-19 07:49:03,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497210193] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:49:03,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:49:03,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:49:03,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130637615] [2023-11-19 07:49:03,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:49:03,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:49:03,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:49:03,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:49:03,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:49:03,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 300 [2023-11-19 07:49:03,616 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 48 transitions, 114 flow. Second operand has 3 states, 3 states have (on average 137.33333333333334) internal successors, (412), 3 states have internal predecessors, (412), 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 07:49:03,616 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:49:03,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 300 [2023-11-19 07:49:03,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:49:04,532 INFO L124 PetriNetUnfolderBase]: 4034/6179 cut-off events. [2023-11-19 07:49:04,533 INFO L125 PetriNetUnfolderBase]: For 601/601 co-relation queries the response was YES. [2023-11-19 07:49:04,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11940 conditions, 6179 events. 4034/6179 cut-off events. For 601/601 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 38321 event pairs, 1810 based on Foata normal form. 474/4764 useless extension candidates. Maximal degree in co-relation 4083. Up to 3293 conditions per place. [2023-11-19 07:49:04,604 INFO L140 encePairwiseOnDemand]: 293/300 looper letters, 44 selfloop transitions, 2 changer transitions 0/62 dead transitions. [2023-11-19 07:49:04,604 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 62 transitions, 246 flow [2023-11-19 07:49:04,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:49:04,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:49:04,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 459 transitions. [2023-11-19 07:49:04,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.51 [2023-11-19 07:49:04,612 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 459 transitions. [2023-11-19 07:49:04,612 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 459 transitions. [2023-11-19 07:49:04,613 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:49:04,613 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 459 transitions. [2023-11-19 07:49:04,617 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 153.0) internal successors, (459), 3 states have internal predecessors, (459), 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 07:49:04,623 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 300.0) internal successors, (1200), 4 states have internal predecessors, (1200), 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 07:49:04,624 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 300.0) internal successors, (1200), 4 states have internal predecessors, (1200), 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 07:49:04,624 INFO L175 Difference]: Start difference. First operand has 46 places, 48 transitions, 114 flow. Second operand 3 states and 459 transitions. [2023-11-19 07:49:04,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 62 transitions, 246 flow [2023-11-19 07:49:04,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 62 transitions, 242 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-11-19 07:49:04,629 INFO L231 Difference]: Finished difference. Result has 48 places, 44 transitions, 112 flow [2023-11-19 07:49:04,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=48, PETRI_TRANSITIONS=44} [2023-11-19 07:49:04,631 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 2 predicate places. [2023-11-19 07:49:04,632 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 44 transitions, 112 flow [2023-11-19 07:49:04,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 137.33333333333334) internal successors, (412), 3 states have internal predecessors, (412), 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 07:49:04,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:49:04,633 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:49:04,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 07:49:04,634 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-19 07:49:04,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:49:04,635 INFO L85 PathProgramCache]: Analyzing trace with hash -1915228754, now seen corresponding path program 1 times [2023-11-19 07:49:04,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:49:04,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248307312] [2023-11-19 07:49:04,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:49:04,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:49:04,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:49:04,848 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 07:49:04,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:49:04,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248307312] [2023-11-19 07:49:04,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248307312] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:49:04,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:49:04,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:49:04,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619030605] [2023-11-19 07:49:04,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:49:04,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:49:04,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:49:04,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:49:04,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:49:04,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 300 [2023-11-19 07:49:04,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 44 transitions, 112 flow. Second operand has 3 states, 3 states have (on average 133.0) internal successors, (399), 3 states have internal predecessors, (399), 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 07:49:04,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:49:04,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 300 [2023-11-19 07:49:04,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:49:05,774 INFO L124 PetriNetUnfolderBase]: 4375/6814 cut-off events. [2023-11-19 07:49:05,775 INFO L125 PetriNetUnfolderBase]: For 1198/1198 co-relation queries the response was YES. [2023-11-19 07:49:05,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13577 conditions, 6814 events. 4375/6814 cut-off events. For 1198/1198 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 44103 event pairs, 2856 based on Foata normal form. 0/5040 useless extension candidates. Maximal degree in co-relation 7803. Up to 5431 conditions per place. [2023-11-19 07:49:05,850 INFO L140 encePairwiseOnDemand]: 294/300 looper letters, 41 selfloop transitions, 5 changer transitions 0/62 dead transitions. [2023-11-19 07:49:05,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 62 transitions, 250 flow [2023-11-19 07:49:05,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:49:05,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:49:05,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 437 transitions. [2023-11-19 07:49:05,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4855555555555556 [2023-11-19 07:49:05,854 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 437 transitions. [2023-11-19 07:49:05,854 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 437 transitions. [2023-11-19 07:49:05,854 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:49:05,854 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 437 transitions. [2023-11-19 07:49:05,856 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 145.66666666666666) internal successors, (437), 3 states have internal predecessors, (437), 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 07:49:05,859 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 300.0) internal successors, (1200), 4 states have internal predecessors, (1200), 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 07:49:05,860 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 300.0) internal successors, (1200), 4 states have internal predecessors, (1200), 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 07:49:05,860 INFO L175 Difference]: Start difference. First operand has 48 places, 44 transitions, 112 flow. Second operand 3 states and 437 transitions. [2023-11-19 07:49:05,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 62 transitions, 250 flow [2023-11-19 07:49:05,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 62 transitions, 246 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 07:49:05,865 INFO L231 Difference]: Finished difference. Result has 49 places, 48 transitions, 141 flow [2023-11-19 07:49:05,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=141, PETRI_PLACES=49, PETRI_TRANSITIONS=48} [2023-11-19 07:49:05,866 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 3 predicate places. [2023-11-19 07:49:05,867 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 48 transitions, 141 flow [2023-11-19 07:49:05,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 133.0) internal successors, (399), 3 states have internal predecessors, (399), 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 07:49:05,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:49:05,868 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:49:05,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 07:49:05,868 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-19 07:49:05,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:49:05,869 INFO L85 PathProgramCache]: Analyzing trace with hash 355284466, now seen corresponding path program 1 times [2023-11-19 07:49:05,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:49:05,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956784222] [2023-11-19 07:49:05,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:49:05,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:49:05,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:49:05,932 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 07:49:05,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:49:05,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956784222] [2023-11-19 07:49:05,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956784222] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:49:05,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:49:05,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:49:05,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903110679] [2023-11-19 07:49:05,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:49:05,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:49:05,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:49:05,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:49:05,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:49:05,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 300 [2023-11-19 07:49:05,958 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 48 transitions, 141 flow. Second operand has 3 states, 3 states have (on average 137.66666666666666) internal successors, (413), 3 states have internal predecessors, (413), 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 07:49:05,958 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:49:05,958 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 300 [2023-11-19 07:49:05,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:49:07,048 INFO L124 PetriNetUnfolderBase]: 5199/7839 cut-off events. [2023-11-19 07:49:07,049 INFO L125 PetriNetUnfolderBase]: For 2734/2911 co-relation queries the response was YES. [2023-11-19 07:49:07,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18132 conditions, 7839 events. 5199/7839 cut-off events. For 2734/2911 co-relation queries the response was YES. Maximal size of possible extension queue 456. Compared 51706 event pairs, 2241 based on Foata normal form. 354/6925 useless extension candidates. Maximal degree in co-relation 10990. Up to 4285 conditions per place. [2023-11-19 07:49:07,124 INFO L140 encePairwiseOnDemand]: 297/300 looper letters, 50 selfloop transitions, 2 changer transitions 0/68 dead transitions. [2023-11-19 07:49:07,125 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 68 transitions, 310 flow [2023-11-19 07:49:07,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:49:07,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:49:07,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 451 transitions. [2023-11-19 07:49:07,127 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5011111111111111 [2023-11-19 07:49:07,127 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 451 transitions. [2023-11-19 07:49:07,128 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 451 transitions. [2023-11-19 07:49:07,128 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:49:07,128 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 451 transitions. [2023-11-19 07:49:07,130 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 150.33333333333334) internal successors, (451), 3 states have internal predecessors, (451), 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 07:49:07,133 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 300.0) internal successors, (1200), 4 states have internal predecessors, (1200), 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 07:49:07,134 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 300.0) internal successors, (1200), 4 states have internal predecessors, (1200), 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 07:49:07,135 INFO L175 Difference]: Start difference. First operand has 49 places, 48 transitions, 141 flow. Second operand 3 states and 451 transitions. [2023-11-19 07:49:07,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 68 transitions, 310 flow [2023-11-19 07:49:07,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 68 transitions, 302 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:49:07,145 INFO L231 Difference]: Finished difference. Result has 51 places, 48 transitions, 146 flow [2023-11-19 07:49:07,145 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=146, PETRI_PLACES=51, PETRI_TRANSITIONS=48} [2023-11-19 07:49:07,148 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 5 predicate places. [2023-11-19 07:49:07,148 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 48 transitions, 146 flow [2023-11-19 07:49:07,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 137.66666666666666) internal successors, (413), 3 states have internal predecessors, (413), 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 07:49:07,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:49:07,149 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-11-19 07:49:07,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 07:49:07,149 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-19 07:49:07,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:49:07,150 INFO L85 PathProgramCache]: Analyzing trace with hash -431191231, now seen corresponding path program 1 times [2023-11-19 07:49:07,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:49:07,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498887368] [2023-11-19 07:49:07,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:49:07,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:49:07,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:49:07,178 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:49:07,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:49:07,212 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:49:07,212 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-19 07:49:07,213 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-11-19 07:49:07,213 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-11-19 07:49:07,213 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-11-19 07:49:07,213 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-11-19 07:49:07,214 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-11-19 07:49:07,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-19 07:49:07,214 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-11-19 07:49:07,215 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-19 07:49:07,215 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-19 07:49:07,262 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-19 07:49:07,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 181 places, 190 transitions, 408 flow [2023-11-19 07:49:07,305 INFO L124 PetriNetUnfolderBase]: 22/248 cut-off events. [2023-11-19 07:49:07,305 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-19 07:49:07,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 267 conditions, 248 events. 22/248 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 668 event pairs, 0 based on Foata normal form. 0/217 useless extension candidates. Maximal degree in co-relation 207. Up to 10 conditions per place. [2023-11-19 07:49:07,308 INFO L82 GeneralOperation]: Start removeDead. Operand has 181 places, 190 transitions, 408 flow [2023-11-19 07:49:07,311 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 181 places, 190 transitions, 408 flow [2023-11-19 07:49:07,311 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:49:07,311 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 181 places, 190 transitions, 408 flow [2023-11-19 07:49:07,312 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 181 places, 190 transitions, 408 flow [2023-11-19 07:49:07,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 181 places, 190 transitions, 408 flow [2023-11-19 07:49:07,345 INFO L124 PetriNetUnfolderBase]: 22/248 cut-off events. [2023-11-19 07:49:07,345 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-19 07:49:07,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 267 conditions, 248 events. 22/248 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 668 event pairs, 0 based on Foata normal form. 0/217 useless extension candidates. Maximal degree in co-relation 207. Up to 10 conditions per place. [2023-11-19 07:49:07,362 INFO L119 LiptonReduction]: Number of co-enabled transitions 17688 [2023-11-19 07:49:11,390 INFO L134 LiptonReduction]: Checked pairs total: 47738 [2023-11-19 07:49:11,390 INFO L136 LiptonReduction]: Total number of compositions: 175 [2023-11-19 07:49:11,392 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:49:11,393 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;@71203048, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:49:11,393 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-19 07:49:11,397 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:49:11,397 INFO L124 PetriNetUnfolderBase]: 3/26 cut-off events. [2023-11-19 07:49:11,397 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-19 07:49:11,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:49:11,398 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:49:11,398 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-19 07:49:11,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:49:11,398 INFO L85 PathProgramCache]: Analyzing trace with hash -304951503, now seen corresponding path program 1 times [2023-11-19 07:49:11,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:49:11,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719463459] [2023-11-19 07:49:11,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:49:11,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:49:11,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:49:11,519 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 07:49:11,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:49:11,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719463459] [2023-11-19 07:49:11,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719463459] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:49:11,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:49:11,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:49:11,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948256689] [2023-11-19 07:49:11,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:49:11,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:49:11,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:49:11,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:49:11,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:49:11,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 365 [2023-11-19 07:49:11,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 62 transitions, 152 flow. Second operand has 3 states, 3 states have (on average 167.33333333333334) internal successors, (502), 3 states have internal predecessors, (502), 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 07:49:11,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:49:11,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 365 [2023-11-19 07:49:11,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:49:16,022 INFO L124 PetriNetUnfolderBase]: 26671/36365 cut-off events. [2023-11-19 07:49:16,022 INFO L125 PetriNetUnfolderBase]: For 4864/4864 co-relation queries the response was YES. [2023-11-19 07:49:16,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71473 conditions, 36365 events. 26671/36365 cut-off events. For 4864/4864 co-relation queries the response was YES. Maximal size of possible extension queue 1575. Compared 229838 event pairs, 11973 based on Foata normal form. 3562/27705 useless extension candidates. Maximal degree in co-relation 26278. Up to 20274 conditions per place. [2023-11-19 07:49:16,388 INFO L140 encePairwiseOnDemand]: 357/365 looper letters, 52 selfloop transitions, 2 changer transitions 0/79 dead transitions. [2023-11-19 07:49:16,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 79 transitions, 315 flow [2023-11-19 07:49:16,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:49:16,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:49:16,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 559 transitions. [2023-11-19 07:49:16,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5105022831050229 [2023-11-19 07:49:16,391 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 559 transitions. [2023-11-19 07:49:16,391 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 559 transitions. [2023-11-19 07:49:16,392 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:49:16,392 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 559 transitions. [2023-11-19 07:49:16,394 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 186.33333333333334) internal successors, (559), 3 states have internal predecessors, (559), 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 07:49:16,397 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 365.0) internal successors, (1460), 4 states have internal predecessors, (1460), 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 07:49:16,398 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 365.0) internal successors, (1460), 4 states have internal predecessors, (1460), 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 07:49:16,399 INFO L175 Difference]: Start difference. First operand has 59 places, 62 transitions, 152 flow. Second operand 3 states and 559 transitions. [2023-11-19 07:49:16,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 79 transitions, 315 flow [2023-11-19 07:49:16,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 79 transitions, 303 flow, removed 6 selfloop flow, removed 0 redundant places. [2023-11-19 07:49:16,404 INFO L231 Difference]: Finished difference. Result has 61 places, 57 transitions, 144 flow [2023-11-19 07:49:16,405 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=365, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=144, PETRI_PLACES=61, PETRI_TRANSITIONS=57} [2023-11-19 07:49:16,408 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 2 predicate places. [2023-11-19 07:49:16,409 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 57 transitions, 144 flow [2023-11-19 07:49:16,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 167.33333333333334) internal successors, (502), 3 states have internal predecessors, (502), 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 07:49:16,409 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:49:16,410 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:49:16,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-19 07:49:16,410 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-19 07:49:16,410 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:49:16,410 INFO L85 PathProgramCache]: Analyzing trace with hash 873308181, now seen corresponding path program 1 times [2023-11-19 07:49:16,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:49:16,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377663333] [2023-11-19 07:49:16,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:49:16,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:49:16,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:49:16,521 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 07:49:16,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:49:16,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377663333] [2023-11-19 07:49:16,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377663333] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:49:16,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:49:16,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:49:16,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512234121] [2023-11-19 07:49:16,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:49:16,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:49:16,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:49:16,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:49:16,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:49:16,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 365 [2023-11-19 07:49:16,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 57 transitions, 144 flow. Second operand has 3 states, 3 states have (on average 162.0) internal successors, (486), 3 states have internal predecessors, (486), 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 07:49:16,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:49:16,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 365 [2023-11-19 07:49:16,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:49:20,743 INFO L124 PetriNetUnfolderBase]: 28388/39860 cut-off events. [2023-11-19 07:49:20,743 INFO L125 PetriNetUnfolderBase]: For 6572/6572 co-relation queries the response was YES. [2023-11-19 07:49:20,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78960 conditions, 39860 events. 28388/39860 cut-off events. For 6572/6572 co-relation queries the response was YES. Maximal size of possible extension queue 1721. Compared 274576 event pairs, 17791 based on Foata normal form. 0/28056 useless extension candidates. Maximal degree in co-relation 45987. Up to 32546 conditions per place. [2023-11-19 07:49:21,150 INFO L140 encePairwiseOnDemand]: 358/365 looper letters, 48 selfloop transitions, 6 changer transitions 0/79 dead transitions. [2023-11-19 07:49:21,151 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 79 transitions, 311 flow [2023-11-19 07:49:21,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:49:21,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:49:21,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 532 transitions. [2023-11-19 07:49:21,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4858447488584475 [2023-11-19 07:49:21,154 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 532 transitions. [2023-11-19 07:49:21,154 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 532 transitions. [2023-11-19 07:49:21,155 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:49:21,155 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 532 transitions. [2023-11-19 07:49:21,158 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 177.33333333333334) internal successors, (532), 3 states have internal predecessors, (532), 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 07:49:21,161 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 365.0) internal successors, (1460), 4 states have internal predecessors, (1460), 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 07:49:21,162 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 365.0) internal successors, (1460), 4 states have internal predecessors, (1460), 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 07:49:21,163 INFO L175 Difference]: Start difference. First operand has 61 places, 57 transitions, 144 flow. Second operand 3 states and 532 transitions. [2023-11-19 07:49:21,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 79 transitions, 311 flow [2023-11-19 07:49:21,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 79 transitions, 307 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 07:49:21,174 INFO L231 Difference]: Finished difference. Result has 62 places, 62 transitions, 180 flow [2023-11-19 07:49:21,174 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=365, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=180, PETRI_PLACES=62, PETRI_TRANSITIONS=62} [2023-11-19 07:49:21,177 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 3 predicate places. [2023-11-19 07:49:21,177 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 62 transitions, 180 flow [2023-11-19 07:49:21,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 162.0) internal successors, (486), 3 states have internal predecessors, (486), 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 07:49:21,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:49:21,179 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:49:21,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-19 07:49:21,180 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-19 07:49:21,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:49:21,180 INFO L85 PathProgramCache]: Analyzing trace with hash 477708082, now seen corresponding path program 1 times [2023-11-19 07:49:21,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:49:21,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305547610] [2023-11-19 07:49:21,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:49:21,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:49:21,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:49:21,255 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 07:49:21,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:49:21,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305547610] [2023-11-19 07:49:21,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305547610] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:49:21,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:49:21,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:49:21,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357384440] [2023-11-19 07:49:21,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:49:21,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:49:21,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:49:21,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:49:21,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:49:21,280 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 365 [2023-11-19 07:49:21,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 62 transitions, 180 flow. Second operand has 3 states, 3 states have (on average 167.33333333333334) internal successors, (502), 3 states have internal predecessors, (502), 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 07:49:21,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:49:21,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 365 [2023-11-19 07:49:21,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:49:26,517 INFO L124 PetriNetUnfolderBase]: 36599/53050 cut-off events. [2023-11-19 07:49:26,517 INFO L125 PetriNetUnfolderBase]: For 17865/18780 co-relation queries the response was YES. [2023-11-19 07:49:26,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118256 conditions, 53050 events. 36599/53050 cut-off events. For 17865/18780 co-relation queries the response was YES. Maximal size of possible extension queue 2390. Compared 403668 event pairs, 18947 based on Foata normal form. 1973/46753 useless extension candidates. Maximal degree in co-relation 73772. Up to 34199 conditions per place. [2023-11-19 07:49:27,009 INFO L140 encePairwiseOnDemand]: 362/365 looper letters, 62 selfloop transitions, 2 changer transitions 0/89 dead transitions. [2023-11-19 07:49:27,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 89 transitions, 397 flow [2023-11-19 07:49:27,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:49:27,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:49:27,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 551 transitions. [2023-11-19 07:49:27,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5031963470319635 [2023-11-19 07:49:27,014 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 551 transitions. [2023-11-19 07:49:27,014 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 551 transitions. [2023-11-19 07:49:27,015 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:49:27,015 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 551 transitions. [2023-11-19 07:49:27,017 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 183.66666666666666) internal successors, (551), 3 states have internal predecessors, (551), 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 07:49:27,021 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 365.0) internal successors, (1460), 4 states have internal predecessors, (1460), 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 07:49:27,021 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 365.0) internal successors, (1460), 4 states have internal predecessors, (1460), 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 07:49:27,022 INFO L175 Difference]: Start difference. First operand has 62 places, 62 transitions, 180 flow. Second operand 3 states and 551 transitions. [2023-11-19 07:49:27,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 89 transitions, 397 flow [2023-11-19 07:49:27,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 89 transitions, 387 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:49:27,075 INFO L231 Difference]: Finished difference. Result has 64 places, 62 transitions, 184 flow [2023-11-19 07:49:27,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=365, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=184, PETRI_PLACES=64, PETRI_TRANSITIONS=62} [2023-11-19 07:49:27,076 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 5 predicate places. [2023-11-19 07:49:27,076 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 62 transitions, 184 flow [2023-11-19 07:49:27,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 167.33333333333334) internal successors, (502), 3 states have internal predecessors, (502), 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 07:49:27,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:49:27,077 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:49:27,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-19 07:49:27,078 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-19 07:49:27,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:49:27,078 INFO L85 PathProgramCache]: Analyzing trace with hash 781757735, now seen corresponding path program 1 times [2023-11-19 07:49:27,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:49:27,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823459619] [2023-11-19 07:49:27,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:49:27,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:49:27,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:49:27,306 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:49:27,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:49:27,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823459619] [2023-11-19 07:49:27,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823459619] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:49:27,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:49:27,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:49:27,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823577872] [2023-11-19 07:49:27,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:49:27,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:49:27,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:49:27,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:49:27,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:49:27,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 365 [2023-11-19 07:49:27,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 62 transitions, 184 flow. Second operand has 5 states, 5 states have (on average 157.0) internal successors, (785), 5 states have internal predecessors, (785), 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 07:49:27,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:49:27,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 365 [2023-11-19 07:49:27,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:49:32,619 INFO L124 PetriNetUnfolderBase]: 34912/49012 cut-off events. [2023-11-19 07:49:32,619 INFO L125 PetriNetUnfolderBase]: For 23344/25150 co-relation queries the response was YES. [2023-11-19 07:49:32,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114181 conditions, 49012 events. 34912/49012 cut-off events. For 23344/25150 co-relation queries the response was YES. Maximal size of possible extension queue 2358. Compared 354928 event pairs, 20907 based on Foata normal form. 282/41025 useless extension candidates. Maximal degree in co-relation 53709. Up to 38193 conditions per place. [2023-11-19 07:49:33,023 INFO L140 encePairwiseOnDemand]: 358/365 looper letters, 49 selfloop transitions, 10 changer transitions 0/84 dead transitions. [2023-11-19 07:49:33,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 84 transitions, 376 flow [2023-11-19 07:49:33,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:49:33,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 07:49:33,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 675 transitions. [2023-11-19 07:49:33,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4623287671232877 [2023-11-19 07:49:33,027 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 675 transitions. [2023-11-19 07:49:33,028 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 675 transitions. [2023-11-19 07:49:33,028 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:49:33,029 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 675 transitions. [2023-11-19 07:49:33,031 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 168.75) internal successors, (675), 4 states have internal predecessors, (675), 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 07:49:33,034 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 365.0) internal successors, (1825), 5 states have internal predecessors, (1825), 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 07:49:33,035 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 365.0) internal successors, (1825), 5 states have internal predecessors, (1825), 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 07:49:33,035 INFO L175 Difference]: Start difference. First operand has 64 places, 62 transitions, 184 flow. Second operand 4 states and 675 transitions. [2023-11-19 07:49:33,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 84 transitions, 376 flow [2023-11-19 07:49:33,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 84 transitions, 370 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 07:49:33,059 INFO L231 Difference]: Finished difference. Result has 66 places, 66 transitions, 237 flow [2023-11-19 07:49:33,060 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=365, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=237, PETRI_PLACES=66, PETRI_TRANSITIONS=66} [2023-11-19 07:49:33,060 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 7 predicate places. [2023-11-19 07:49:33,061 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 66 transitions, 237 flow [2023-11-19 07:49:33,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 157.0) internal successors, (785), 5 states have internal predecessors, (785), 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 07:49:33,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:49:33,062 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:49:33,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-19 07:49:33,062 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-19 07:49:33,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:49:33,063 INFO L85 PathProgramCache]: Analyzing trace with hash 166651601, now seen corresponding path program 1 times [2023-11-19 07:49:33,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:49:33,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894932897] [2023-11-19 07:49:33,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:49:33,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:49:33,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:49:33,203 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 07:49:33,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:49:33,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894932897] [2023-11-19 07:49:33,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894932897] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:49:33,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:49:33,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:49:33,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343683083] [2023-11-19 07:49:33,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:49:33,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:49:33,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:49:33,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:49:33,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:49:33,249 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 365 [2023-11-19 07:49:33,249 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 66 transitions, 237 flow. Second operand has 3 states, 3 states have (on average 162.0) internal successors, (486), 3 states have internal predecessors, (486), 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 07:49:33,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:49:33,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 365 [2023-11-19 07:49:33,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand