./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-ext/39_rand_lock_p0_vs.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c3f7b09-ec13-4bbb-ae91-754aa7fb5e2b/bin/uautomizer-J5u9QxTXDZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c3f7b09-ec13-4bbb-ae91-754aa7fb5e2b/bin/uautomizer-J5u9QxTXDZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c3f7b09-ec13-4bbb-ae91-754aa7fb5e2b/bin/uautomizer-J5u9QxTXDZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c3f7b09-ec13-4bbb-ae91-754aa7fb5e2b/bin/uautomizer-J5u9QxTXDZ/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-ext/39_rand_lock_p0_vs.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c3f7b09-ec13-4bbb-ae91-754aa7fb5e2b/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c3f7b09-ec13-4bbb-ae91-754aa7fb5e2b/bin/uautomizer-J5u9QxTXDZ --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 13ffae79fd42fd88852ffaba2bbbf2601df90fdda2b5dc6bd9b6228e2cf540c7 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-dbf71c6-m [2022-10-17 10:39:56,015 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 10:39:56,019 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 10:39:56,055 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 10:39:56,056 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 10:39:56,058 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 10:39:56,060 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 10:39:56,062 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 10:39:56,065 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 10:39:56,066 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 10:39:56,068 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 10:39:56,070 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 10:39:56,070 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 10:39:56,072 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 10:39:56,074 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 10:39:56,075 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 10:39:56,077 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 10:39:56,079 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 10:39:56,081 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 10:39:56,085 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 10:39:56,087 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 10:39:56,089 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 10:39:56,091 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 10:39:56,092 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 10:39:56,097 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 10:39:56,098 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 10:39:56,099 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 10:39:56,100 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 10:39:56,101 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 10:39:56,102 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 10:39:56,103 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 10:39:56,104 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 10:39:56,105 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 10:39:56,106 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 10:39:56,108 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 10:39:56,109 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 10:39:56,110 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 10:39:56,110 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 10:39:56,111 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 10:39:56,112 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 10:39:56,113 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 10:39:56,114 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c3f7b09-ec13-4bbb-ae91-754aa7fb5e2b/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-10-17 10:39:56,140 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 10:39:56,141 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 10:39:56,141 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 10:39:56,142 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 10:39:56,143 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 10:39:56,143 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 10:39:56,144 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-17 10:39:56,145 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-17 10:39:56,145 INFO L138 SettingsManager]: * Use SBE=true [2022-10-17 10:39:56,146 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 10:39:56,146 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 10:39:56,157 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 10:39:56,157 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 10:39:56,157 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 10:39:56,158 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 10:39:56,158 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 10:39:56,158 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 10:39:56,158 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 10:39:56,158 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 10:39:56,159 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 10:39:56,159 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 10:39:56,159 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 10:39:56,159 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-17 10:39:56,159 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 10:39:56,160 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:39:56,160 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 10:39:56,160 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 10:39:56,160 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 10:39:56,160 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-17 10:39:56,161 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 10:39:56,161 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-10-17 10:39:56,161 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-10-17 10:39:56,161 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 10:39:56,161 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c3f7b09-ec13-4bbb-ae91-754aa7fb5e2b/bin/uautomizer-J5u9QxTXDZ/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c3f7b09-ec13-4bbb-ae91-754aa7fb5e2b/bin/uautomizer-J5u9QxTXDZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 13ffae79fd42fd88852ffaba2bbbf2601df90fdda2b5dc6bd9b6228e2cf540c7 [2022-10-17 10:39:56,508 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 10:39:56,541 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 10:39:56,544 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 10:39:56,551 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 10:39:56,552 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 10:39:56,553 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c3f7b09-ec13-4bbb-ae91-754aa7fb5e2b/bin/uautomizer-J5u9QxTXDZ/../../sv-benchmarks/c/pthread-ext/39_rand_lock_p0_vs.i [2022-10-17 10:39:56,627 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c3f7b09-ec13-4bbb-ae91-754aa7fb5e2b/bin/uautomizer-J5u9QxTXDZ/data/d62971f31/2b088ddd802247bbabce5c5bf22e4d87/FLAG2e705b4b3 [2022-10-17 10:39:57,191 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 10:39:57,192 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c3f7b09-ec13-4bbb-ae91-754aa7fb5e2b/sv-benchmarks/c/pthread-ext/39_rand_lock_p0_vs.i [2022-10-17 10:39:57,210 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c3f7b09-ec13-4bbb-ae91-754aa7fb5e2b/bin/uautomizer-J5u9QxTXDZ/data/d62971f31/2b088ddd802247bbabce5c5bf22e4d87/FLAG2e705b4b3 [2022-10-17 10:39:57,480 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c3f7b09-ec13-4bbb-ae91-754aa7fb5e2b/bin/uautomizer-J5u9QxTXDZ/data/d62971f31/2b088ddd802247bbabce5c5bf22e4d87 [2022-10-17 10:39:57,483 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 10:39:57,489 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 10:39:57,491 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 10:39:57,491 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 10:39:57,495 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 10:39:57,496 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:39:57" (1/1) ... [2022-10-17 10:39:57,500 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@150cda17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:39:57, skipping insertion in model container [2022-10-17 10:39:57,500 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:39:57" (1/1) ... [2022-10-17 10:39:57,506 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 10:39:57,548 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 10:39:57,844 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-10-17 10:39:58,101 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c3f7b09-ec13-4bbb-ae91-754aa7fb5e2b/sv-benchmarks/c/pthread-ext/39_rand_lock_p0_vs.i[30959,30972] [2022-10-17 10:39:58,117 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:39:58,127 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 10:39:58,163 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-10-17 10:39:58,192 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c3f7b09-ec13-4bbb-ae91-754aa7fb5e2b/sv-benchmarks/c/pthread-ext/39_rand_lock_p0_vs.i[30959,30972] [2022-10-17 10:39:58,210 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:39:58,254 INFO L208 MainTranslator]: Completed translation [2022-10-17 10:39:58,255 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:39:58 WrapperNode [2022-10-17 10:39:58,255 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 10:39:58,256 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 10:39:58,257 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 10:39:58,257 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 10:39:58,265 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:39:58" (1/1) ... [2022-10-17 10:39:58,281 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:39:58" (1/1) ... [2022-10-17 10:39:58,317 INFO L138 Inliner]: procedures = 176, calls = 21, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 79 [2022-10-17 10:39:58,317 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 10:39:58,319 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 10:39:58,319 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 10:39:58,319 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 10:39:58,328 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:39:58" (1/1) ... [2022-10-17 10:39:58,328 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:39:58" (1/1) ... [2022-10-17 10:39:58,337 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:39:58" (1/1) ... [2022-10-17 10:39:58,338 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:39:58" (1/1) ... [2022-10-17 10:39:58,343 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:39:58" (1/1) ... [2022-10-17 10:39:58,347 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:39:58" (1/1) ... [2022-10-17 10:39:58,350 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:39:58" (1/1) ... [2022-10-17 10:39:58,351 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:39:58" (1/1) ... [2022-10-17 10:39:58,355 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 10:39:58,361 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 10:39:58,362 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 10:39:58,362 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 10:39:58,365 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:39:58" (1/1) ... [2022-10-17 10:39:58,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:39:58,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c3f7b09-ec13-4bbb-ae91-754aa7fb5e2b/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:39:58,407 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c3f7b09-ec13-4bbb-ae91-754aa7fb5e2b/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 10:39:58,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c3f7b09-ec13-4bbb-ae91-754aa7fb5e2b/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 10:39:58,460 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2022-10-17 10:39:58,460 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2022-10-17 10:39:58,460 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-17 10:39:58,461 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-10-17 10:39:58,461 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 10:39:58,461 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-17 10:39:58,461 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-17 10:39:58,462 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 10:39:58,462 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-10-17 10:39:58,462 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 10:39:58,462 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 10:39:58,464 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-10-17 10:39:58,605 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 10:39:58,608 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 10:39:58,794 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 10:39:58,892 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 10:39:58,892 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-10-17 10:39:58,895 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:39:58 BoogieIcfgContainer [2022-10-17 10:39:58,895 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 10:39:58,907 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 10:39:58,917 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 10:39:58,921 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 10:39:58,921 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 10:39:57" (1/3) ... [2022-10-17 10:39:58,922 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fea9cac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:39:58, skipping insertion in model container [2022-10-17 10:39:58,922 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:39:58" (2/3) ... [2022-10-17 10:39:58,922 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fea9cac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:39:58, skipping insertion in model container [2022-10-17 10:39:58,923 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:39:58" (3/3) ... [2022-10-17 10:39:58,924 INFO L112 eAbstractionObserver]: Analyzing ICFG 39_rand_lock_p0_vs.i [2022-10-17 10:39:58,940 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-10-17 10:39:58,951 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 10:39:58,951 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-10-17 10:39:58,951 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-10-17 10:39:59,072 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-10-17 10:39:59,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 73 places, 74 transitions, 153 flow [2022-10-17 10:39:59,163 INFO L130 PetriNetUnfolder]: 5/85 cut-off events. [2022-10-17 10:39:59,164 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-10-17 10:39:59,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90 conditions, 85 events. 5/85 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 66 event pairs, 0 based on Foata normal form. 0/77 useless extension candidates. Maximal degree in co-relation 57. Up to 4 conditions per place. [2022-10-17 10:39:59,170 INFO L82 GeneralOperation]: Start removeDead. Operand has 73 places, 74 transitions, 153 flow [2022-10-17 10:39:59,175 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 73 places, 74 transitions, 153 flow [2022-10-17 10:39:59,193 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 10:39:59,201 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3e21b1fe, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 10:39:59,202 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-10-17 10:39:59,220 INFO L130 PetriNetUnfolder]: 2/46 cut-off events. [2022-10-17 10:39:59,221 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-10-17 10:39:59,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:39:59,222 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:39:59,223 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:39:59,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:39:59,238 INFO L85 PathProgramCache]: Analyzing trace with hash 1113330514, now seen corresponding path program 1 times [2022-10-17 10:39:59,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:39:59,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233775155] [2022-10-17 10:39:59,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:39:59,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:39:59,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-10-17 10:39:59,406 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-10-17 10:39:59,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-10-17 10:39:59,503 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-10-17 10:39:59,505 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-10-17 10:39:59,506 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2022-10-17 10:39:59,509 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2022-10-17 10:39:59,510 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2022-10-17 10:39:59,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 10:39:59,513 INFO L444 BasicCegarLoop]: Path program histogram: [1] [2022-10-17 10:39:59,522 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-10-17 10:39:59,522 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-10-17 10:39:59,625 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-10-17 10:39:59,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 117 places, 119 transitions, 250 flow [2022-10-17 10:39:59,697 INFO L130 PetriNetUnfolder]: 9/143 cut-off events. [2022-10-17 10:39:59,698 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-10-17 10:39:59,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153 conditions, 143 events. 9/143 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 228 event pairs, 0 based on Foata normal form. 0/129 useless extension candidates. Maximal degree in co-relation 101. Up to 6 conditions per place. [2022-10-17 10:39:59,701 INFO L82 GeneralOperation]: Start removeDead. Operand has 117 places, 119 transitions, 250 flow [2022-10-17 10:39:59,705 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 117 places, 119 transitions, 250 flow [2022-10-17 10:39:59,706 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 10:39:59,708 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3e21b1fe, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 10:39:59,709 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-10-17 10:39:59,722 INFO L130 PetriNetUnfolder]: 2/47 cut-off events. [2022-10-17 10:39:59,726 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-10-17 10:39:59,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:39:59,727 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:39:59,728 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-10-17 10:39:59,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:39:59,730 INFO L85 PathProgramCache]: Analyzing trace with hash 1858723552, now seen corresponding path program 1 times [2022-10-17 10:39:59,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:39:59,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698421222] [2022-10-17 10:39:59,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:39:59,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:39:59,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:39:59,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:39:59,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:39:59,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698421222] [2022-10-17 10:39:59,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698421222] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:39:59,999 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:40:00,000 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 10:40:00,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689825292] [2022-10-17 10:40:00,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:40:00,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 10:40:00,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:40:00,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 10:40:00,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 10:40:00,077 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 119 [2022-10-17 10:40:00,081 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 119 transitions, 250 flow. Second operand has 3 states, 3 states have (on average 101.0) internal successors, (303), 3 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:40:00,082 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:40:00,082 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 119 [2022-10-17 10:40:00,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:40:00,378 INFO L130 PetriNetUnfolder]: 51/413 cut-off events. [2022-10-17 10:40:00,378 INFO L131 PetriNetUnfolder]: For 21/21 co-relation queries the response was YES. [2022-10-17 10:40:00,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 520 conditions, 413 events. 51/413 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1755 event pairs, 16 based on Foata normal form. 57/442 useless extension candidates. Maximal degree in co-relation 332. Up to 47 conditions per place. [2022-10-17 10:40:00,391 INFO L137 encePairwiseOnDemand]: 110/119 looper letters, 21 selfloop transitions, 3 changer transitions 0/119 dead transitions. [2022-10-17 10:40:00,391 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 119 transitions, 303 flow [2022-10-17 10:40:00,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 10:40:00,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-10-17 10:40:00,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 334 transitions. [2022-10-17 10:40:00,419 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9355742296918768 [2022-10-17 10:40:00,420 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 334 transitions. [2022-10-17 10:40:00,424 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 334 transitions. [2022-10-17 10:40:00,430 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:40:00,433 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 334 transitions. [2022-10-17 10:40:00,442 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 111.33333333333333) internal successors, (334), 3 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:40:00,453 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 119.0) internal successors, (476), 4 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:40:00,455 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 119.0) internal successors, (476), 4 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:40:00,457 INFO L175 Difference]: Start difference. First operand has 117 places, 119 transitions, 250 flow. Second operand 3 states and 334 transitions. [2022-10-17 10:40:00,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 119 transitions, 303 flow [2022-10-17 10:40:00,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 119 transitions, 301 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-10-17 10:40:00,482 INFO L231 Difference]: Finished difference. Result has 114 places, 112 transitions, 251 flow [2022-10-17 10:40:00,484 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=119, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=251, PETRI_PLACES=114, PETRI_TRANSITIONS=112} [2022-10-17 10:40:00,492 INFO L287 CegarLoopForPetriNet]: 117 programPoint places, -3 predicate places. [2022-10-17 10:40:00,493 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 112 transitions, 251 flow [2022-10-17 10:40:00,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 101.0) internal successors, (303), 3 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:40:00,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:40:00,494 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:40:00,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-17 10:40:00,494 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-10-17 10:40:00,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:40:00,496 INFO L85 PathProgramCache]: Analyzing trace with hash -2094686854, now seen corresponding path program 1 times [2022-10-17 10:40:00,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:40:00,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366578942] [2022-10-17 10:40:00,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:40:00,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:40:00,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-10-17 10:40:00,570 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-10-17 10:40:00,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-10-17 10:40:00,604 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-10-17 10:40:00,607 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-10-17 10:40:00,608 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-10-17 10:40:00,609 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-10-17 10:40:00,610 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2022-10-17 10:40:00,614 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-10-17 10:40:00,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-17 10:40:00,615 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1] [2022-10-17 10:40:00,616 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-10-17 10:40:00,616 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-10-17 10:40:00,689 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-10-17 10:40:00,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 161 places, 164 transitions, 349 flow [2022-10-17 10:40:00,774 INFO L130 PetriNetUnfolder]: 13/201 cut-off events. [2022-10-17 10:40:00,774 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-10-17 10:40:00,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 217 conditions, 201 events. 13/201 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 465 event pairs, 0 based on Foata normal form. 0/181 useless extension candidates. Maximal degree in co-relation 147. Up to 8 conditions per place. [2022-10-17 10:40:00,777 INFO L82 GeneralOperation]: Start removeDead. Operand has 161 places, 164 transitions, 349 flow [2022-10-17 10:40:00,781 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 161 places, 164 transitions, 349 flow [2022-10-17 10:40:00,783 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 10:40:00,785 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3e21b1fe, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 10:40:00,786 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-10-17 10:40:00,797 INFO L130 PetriNetUnfolder]: 2/50 cut-off events. [2022-10-17 10:40:00,797 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-10-17 10:40:00,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:40:00,797 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:40:00,798 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-10-17 10:40:00,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:40:00,799 INFO L85 PathProgramCache]: Analyzing trace with hash -1438535156, now seen corresponding path program 1 times [2022-10-17 10:40:00,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:40:00,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079403440] [2022-10-17 10:40:00,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:40:00,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:40:00,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:40:00,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:40:00,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:40:00,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079403440] [2022-10-17 10:40:00,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079403440] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:40:00,935 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:40:00,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 10:40:00,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998272012] [2022-10-17 10:40:00,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:40:00,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 10:40:00,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:40:00,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 10:40:00,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 10:40:00,941 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 164 [2022-10-17 10:40:00,942 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 164 transitions, 349 flow. Second operand has 3 states, 3 states have (on average 138.0) internal successors, (414), 3 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:40:00,942 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:40:00,942 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 164 [2022-10-17 10:40:00,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:40:01,762 INFO L130 PetriNetUnfolder]: 641/3067 cut-off events. [2022-10-17 10:40:01,762 INFO L131 PetriNetUnfolder]: For 277/277 co-relation queries the response was YES. [2022-10-17 10:40:01,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4088 conditions, 3067 events. 641/3067 cut-off events. For 277/277 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 26768 event pairs, 199 based on Foata normal form. 444/3248 useless extension candidates. Maximal degree in co-relation 1196. Up to 626 conditions per place. [2022-10-17 10:40:01,815 INFO L137 encePairwiseOnDemand]: 152/164 looper letters, 32 selfloop transitions, 4 changer transitions 0/168 dead transitions. [2022-10-17 10:40:01,815 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 168 transitions, 441 flow [2022-10-17 10:40:01,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 10:40:01,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-10-17 10:40:01,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 460 transitions. [2022-10-17 10:40:01,820 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9349593495934959 [2022-10-17 10:40:01,820 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 460 transitions. [2022-10-17 10:40:01,821 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 460 transitions. [2022-10-17 10:40:01,821 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:40:01,822 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 460 transitions. [2022-10-17 10:40:01,824 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 153.33333333333334) internal successors, (460), 3 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:40:01,829 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 164.0) internal successors, (656), 4 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:40:01,830 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 164.0) internal successors, (656), 4 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:40:01,831 INFO L175 Difference]: Start difference. First operand has 161 places, 164 transitions, 349 flow. Second operand 3 states and 460 transitions. [2022-10-17 10:40:01,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 168 transitions, 441 flow [2022-10-17 10:40:01,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 168 transitions, 433 flow, removed 4 selfloop flow, removed 0 redundant places. [2022-10-17 10:40:01,844 INFO L231 Difference]: Finished difference. Result has 158 places, 157 transitions, 353 flow [2022-10-17 10:40:01,845 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=164, PETRI_DIFFERENCE_MINUEND_FLOW=323, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=353, PETRI_PLACES=158, PETRI_TRANSITIONS=157} [2022-10-17 10:40:01,846 INFO L287 CegarLoopForPetriNet]: 161 programPoint places, -3 predicate places. [2022-10-17 10:40:01,847 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 157 transitions, 353 flow [2022-10-17 10:40:01,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 138.0) internal successors, (414), 3 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:40:01,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:40:01,848 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:40:01,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-17 10:40:01,849 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-10-17 10:40:01,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:40:01,849 INFO L85 PathProgramCache]: Analyzing trace with hash 466374732, now seen corresponding path program 1 times [2022-10-17 10:40:01,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:40:01,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164818145] [2022-10-17 10:40:01,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:40:01,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:40:01,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-10-17 10:40:01,908 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-10-17 10:40:01,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-10-17 10:40:01,956 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-10-17 10:40:01,956 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-10-17 10:40:01,957 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-10-17 10:40:01,957 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-10-17 10:40:01,958 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2022-10-17 10:40:01,958 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-10-17 10:40:01,959 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-10-17 10:40:01,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-10-17 10:40:01,959 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1] [2022-10-17 10:40:01,960 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-10-17 10:40:01,960 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-10-17 10:40:02,030 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-10-17 10:40:02,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 205 places, 209 transitions, 450 flow [2022-10-17 10:40:02,129 INFO L130 PetriNetUnfolder]: 17/259 cut-off events. [2022-10-17 10:40:02,134 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-10-17 10:40:02,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 282 conditions, 259 events. 17/259 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 730 event pairs, 0 based on Foata normal form. 0/233 useless extension candidates. Maximal degree in co-relation 209. Up to 10 conditions per place. [2022-10-17 10:40:02,138 INFO L82 GeneralOperation]: Start removeDead. Operand has 205 places, 209 transitions, 450 flow [2022-10-17 10:40:02,144 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 205 places, 209 transitions, 450 flow [2022-10-17 10:40:02,148 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 10:40:02,150 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3e21b1fe, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 10:40:02,150 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-10-17 10:40:02,158 INFO L130 PetriNetUnfolder]: 2/51 cut-off events. [2022-10-17 10:40:02,158 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-10-17 10:40:02,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:40:02,160 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:40:02,161 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-10-17 10:40:02,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:40:02,161 INFO L85 PathProgramCache]: Analyzing trace with hash 1670197752, now seen corresponding path program 1 times [2022-10-17 10:40:02,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:40:02,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644972945] [2022-10-17 10:40:02,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:40:02,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:40:02,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:40:02,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:40:02,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:40:02,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644972945] [2022-10-17 10:40:02,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644972945] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:40:02,290 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:40:02,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 10:40:02,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431561074] [2022-10-17 10:40:02,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:40:02,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 10:40:02,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:40:02,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 10:40:02,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 10:40:02,294 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 209 [2022-10-17 10:40:02,295 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 209 transitions, 450 flow. Second operand has 3 states, 3 states have (on average 175.0) internal successors, (525), 3 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:40:02,295 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:40:02,296 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 209 [2022-10-17 10:40:02,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:40:07,574 INFO L130 PetriNetUnfolder]: 6567/22791 cut-off events. [2022-10-17 10:40:07,575 INFO L131 PetriNetUnfolder]: For 3211/3211 co-relation queries the response was YES. [2022-10-17 10:40:07,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32331 conditions, 22791 events. 6567/22791 cut-off events. For 3211/3211 co-relation queries the response was YES. Maximal size of possible extension queue 916. Compared 275663 event pairs, 1983 based on Foata normal form. 3541/24144 useless extension candidates. Maximal degree in co-relation 4137. Up to 6832 conditions per place. [2022-10-17 10:40:08,192 INFO L137 encePairwiseOnDemand]: 194/209 looper letters, 43 selfloop transitions, 5 changer transitions 0/217 dead transitions. [2022-10-17 10:40:08,192 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 217 transitions, 583 flow [2022-10-17 10:40:08,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 10:40:08,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-10-17 10:40:08,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 586 transitions. [2022-10-17 10:40:08,196 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9346092503987241 [2022-10-17 10:40:08,196 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 586 transitions. [2022-10-17 10:40:08,197 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 586 transitions. [2022-10-17 10:40:08,198 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:40:08,198 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 586 transitions. [2022-10-17 10:40:08,201 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 195.33333333333334) internal successors, (586), 3 states have internal predecessors, (586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:40:08,203 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 209.0) internal successors, (836), 4 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:40:08,205 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 209.0) internal successors, (836), 4 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:40:08,205 INFO L175 Difference]: Start difference. First operand has 205 places, 209 transitions, 450 flow. Second operand 3 states and 586 transitions. [2022-10-17 10:40:08,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 217 transitions, 583 flow [2022-10-17 10:40:08,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 217 transitions, 565 flow, removed 9 selfloop flow, removed 0 redundant places. [2022-10-17 10:40:08,221 INFO L231 Difference]: Finished difference. Result has 202 places, 202 transitions, 455 flow [2022-10-17 10:40:08,222 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=209, PETRI_DIFFERENCE_MINUEND_FLOW=416, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=455, PETRI_PLACES=202, PETRI_TRANSITIONS=202} [2022-10-17 10:40:08,225 INFO L287 CegarLoopForPetriNet]: 205 programPoint places, -3 predicate places. [2022-10-17 10:40:08,226 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 202 transitions, 455 flow [2022-10-17 10:40:08,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 175.0) internal successors, (525), 3 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:40:08,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:40:08,227 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:40:08,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-10-17 10:40:08,227 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-10-17 10:40:08,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:40:08,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1950359567, now seen corresponding path program 1 times [2022-10-17 10:40:08,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:40:08,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057573919] [2022-10-17 10:40:08,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:40:08,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:40:08,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-10-17 10:40:08,258 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-10-17 10:40:08,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-10-17 10:40:08,308 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-10-17 10:40:08,311 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-10-17 10:40:08,314 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2022-10-17 10:40:08,315 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2022-10-17 10:40:08,315 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2022-10-17 10:40:08,315 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2022-10-17 10:40:08,316 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2022-10-17 10:40:08,316 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2022-10-17 10:40:08,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-10-17 10:40:08,316 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1] [2022-10-17 10:40:08,317 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-10-17 10:40:08,317 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-10-17 10:40:08,372 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-10-17 10:40:08,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 249 places, 254 transitions, 553 flow [2022-10-17 10:40:08,452 INFO L130 PetriNetUnfolder]: 21/317 cut-off events. [2022-10-17 10:40:08,453 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-10-17 10:40:08,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 348 conditions, 317 events. 21/317 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 987 event pairs, 0 based on Foata normal form. 0/285 useless extension candidates. Maximal degree in co-relation 272. Up to 12 conditions per place. [2022-10-17 10:40:08,460 INFO L82 GeneralOperation]: Start removeDead. Operand has 249 places, 254 transitions, 553 flow [2022-10-17 10:40:08,464 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 249 places, 254 transitions, 553 flow [2022-10-17 10:40:08,466 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 10:40:08,466 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3e21b1fe, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 10:40:08,467 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-10-17 10:40:08,472 INFO L130 PetriNetUnfolder]: 2/50 cut-off events. [2022-10-17 10:40:08,473 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-10-17 10:40:08,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:40:08,473 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:40:08,473 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-10-17 10:40:08,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:40:08,474 INFO L85 PathProgramCache]: Analyzing trace with hash -619127644, now seen corresponding path program 1 times [2022-10-17 10:40:08,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:40:08,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425566663] [2022-10-17 10:40:08,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:40:08,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:40:08,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:40:08,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:40:08,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:40:08,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425566663] [2022-10-17 10:40:08,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425566663] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:40:08,560 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:40:08,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 10:40:08,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019770917] [2022-10-17 10:40:08,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:40:08,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 10:40:08,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:40:08,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 10:40:08,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 10:40:08,565 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 254 [2022-10-17 10:40:08,566 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 254 transitions, 553 flow. Second operand has 3 states, 3 states have (on average 212.0) internal successors, (636), 3 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:40:08,567 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:40:08,567 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 254 [2022-10-17 10:40:08,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand