./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_19-callback_racing.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc 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_f050426c-f2c5-4548-ad4c-3de5aa237937/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f050426c-f2c5-4548-ad4c-3de5aa237937/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f050426c-f2c5-4548-ad4c-3de5aa237937/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f050426c-f2c5-4548-ad4c-3de5aa237937/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_19-callback_racing.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f050426c-f2c5-4548-ad4c-3de5aa237937/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f050426c-f2c5-4548-ad4c-3de5aa237937/bin/uautomizer-verify-BQ2R08f2Ya --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 a178b12ba1b75e8e390c539a1b1599b5e56cbe73098e0c8e7ca0eeb62a619e80 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 01:16:01,285 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 01:16:01,352 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f050426c-f2c5-4548-ad4c-3de5aa237937/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 01:16:01,356 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 01:16:01,356 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 01:16:01,380 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 01:16:01,380 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 01:16:01,381 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 01:16:01,382 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 01:16:01,382 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 01:16:01,383 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 01:16:01,383 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 01:16:01,384 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 01:16:01,384 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 01:16:01,385 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 01:16:01,385 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 01:16:01,386 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 01:16:01,386 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 01:16:01,387 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 01:16:01,387 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 01:16:01,388 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 01:16:01,389 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 01:16:01,389 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 01:16:01,389 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 01:16:01,390 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 01:16:01,390 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 01:16:01,391 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 01:16:01,391 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 01:16:01,392 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 01:16:01,392 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 01:16:01,392 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 01:16:01,393 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 01:16:01,393 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 01:16:01,393 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 01:16:01,393 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 01:16:01,394 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 01:16:01,394 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 01:16:01,394 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 01:16:01,394 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 01:16:01,394 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 01:16:01,394 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 01:16:01,395 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 01:16:01,395 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_f050426c-f2c5-4548-ad4c-3de5aa237937/bin/uautomizer-verify-BQ2R08f2Ya/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f050426c-f2c5-4548-ad4c-3de5aa237937/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a178b12ba1b75e8e390c539a1b1599b5e56cbe73098e0c8e7ca0eeb62a619e80 [2023-11-29 01:16:01,599 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 01:16:01,623 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 01:16:01,626 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 01:16:01,627 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 01:16:01,627 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 01:16:01,629 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f050426c-f2c5-4548-ad4c-3de5aa237937/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/goblint-regression/28-race_reach_19-callback_racing.i [2023-11-29 01:16:04,451 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 01:16:04,672 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 01:16:04,673 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f050426c-f2c5-4548-ad4c-3de5aa237937/sv-benchmarks/c/goblint-regression/28-race_reach_19-callback_racing.i [2023-11-29 01:16:04,688 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f050426c-f2c5-4548-ad4c-3de5aa237937/bin/uautomizer-verify-BQ2R08f2Ya/data/4465cf5fb/3707d791a9ba404eb1fcc1212d2daf0e/FLAGc4414366a [2023-11-29 01:16:04,701 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f050426c-f2c5-4548-ad4c-3de5aa237937/bin/uautomizer-verify-BQ2R08f2Ya/data/4465cf5fb/3707d791a9ba404eb1fcc1212d2daf0e [2023-11-29 01:16:04,703 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 01:16:04,705 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 01:16:04,706 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 01:16:04,706 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 01:16:04,711 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 01:16:04,712 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 01:16:04" (1/1) ... [2023-11-29 01:16:04,713 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b984604 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:16:04, skipping insertion in model container [2023-11-29 01:16:04,713 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 01:16:04" (1/1) ... [2023-11-29 01:16:04,757 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 01:16:05,062 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_f050426c-f2c5-4548-ad4c-3de5aa237937/sv-benchmarks/c/goblint-regression/28-race_reach_19-callback_racing.i[30212,30225] [2023-11-29 01:16:05,087 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 01:16:05,101 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 01:16:05,134 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_f050426c-f2c5-4548-ad4c-3de5aa237937/sv-benchmarks/c/goblint-regression/28-race_reach_19-callback_racing.i[30212,30225] [2023-11-29 01:16:05,142 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 01:16:05,179 WARN L675 CHandler]: The function callback is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 01:16:05,187 INFO L206 MainTranslator]: Completed translation [2023-11-29 01:16:05,188 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:16:05 WrapperNode [2023-11-29 01:16:05,188 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 01:16:05,189 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 01:16:05,189 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 01:16:05,190 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 01:16:05,197 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:16:05" (1/1) ... [2023-11-29 01:16:05,212 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:16:05" (1/1) ... [2023-11-29 01:16:05,238 INFO L138 Inliner]: procedures = 174, calls = 44, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 151 [2023-11-29 01:16:05,239 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 01:16:05,239 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 01:16:05,239 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 01:16:05,240 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 01:16:05,251 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:16:05" (1/1) ... [2023-11-29 01:16:05,252 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:16:05" (1/1) ... [2023-11-29 01:16:05,255 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:16:05" (1/1) ... [2023-11-29 01:16:05,271 INFO L175 MemorySlicer]: Split 19 memory accesses to 5 slices as follows [2, 5, 5, 5, 2]. 26 percent of accesses are in the largest equivalence class. The 17 initializations are split as follows [2, 5, 5, 5, 0]. The 1 writes are split as follows [0, 0, 0, 0, 1]. [2023-11-29 01:16:05,271 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:16:05" (1/1) ... [2023-11-29 01:16:05,271 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:16:05" (1/1) ... [2023-11-29 01:16:05,278 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:16:05" (1/1) ... [2023-11-29 01:16:05,282 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:16:05" (1/1) ... [2023-11-29 01:16:05,285 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:16:05" (1/1) ... [2023-11-29 01:16:05,287 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:16:05" (1/1) ... [2023-11-29 01:16:05,291 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 01:16:05,292 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 01:16:05,292 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 01:16:05,292 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 01:16:05,293 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:16:05" (1/1) ... [2023-11-29 01:16:05,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 01:16:05,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f050426c-f2c5-4548-ad4c-3de5aa237937/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:16:05,324 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f050426c-f2c5-4548-ad4c-3de5aa237937/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 01:16:05,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f050426c-f2c5-4548-ad4c-3de5aa237937/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 01:16:05,360 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 01:16:05,360 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 01:16:05,360 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-29 01:16:05,360 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-29 01:16:05,361 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-29 01:16:05,361 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 01:16:05,361 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 01:16:05,361 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-29 01:16:05,361 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-29 01:16:05,362 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-29 01:16:05,362 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-29 01:16:05,362 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 01:16:05,362 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 01:16:05,362 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-29 01:16:05,363 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-29 01:16:05,363 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 01:16:05,363 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 01:16:05,363 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 01:16:05,363 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-29 01:16:05,364 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-29 01:16:05,364 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-29 01:16:05,364 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-29 01:16:05,364 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 01:16:05,364 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 01:16:05,366 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-29 01:16:05,513 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 01:16:05,515 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 01:16:05,728 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 01:16:05,908 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 01:16:05,908 INFO L309 CfgBuilder]: Removed 11 assume(true) statements. [2023-11-29 01:16:05,908 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 01:16:05 BoogieIcfgContainer [2023-11-29 01:16:05,909 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 01:16:05,912 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 01:16:05,912 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 01:16:05,915 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 01:16:05,916 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 01:16:04" (1/3) ... [2023-11-29 01:16:05,916 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2decede6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 01:16:05, skipping insertion in model container [2023-11-29 01:16:05,916 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:16:05" (2/3) ... [2023-11-29 01:16:05,917 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2decede6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 01:16:05, skipping insertion in model container [2023-11-29 01:16:05,917 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 01:16:05" (3/3) ... [2023-11-29 01:16:05,918 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_19-callback_racing.i [2023-11-29 01:16:05,927 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-29 01:16:05,939 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 01:16:05,939 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 01:16:05,939 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-29 01:16:05,976 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-11-29 01:16:06,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 45 places, 54 transitions, 115 flow [2023-11-29 01:16:06,073 INFO L124 PetriNetUnfolderBase]: 20/85 cut-off events. [2023-11-29 01:16:06,073 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-29 01:16:06,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90 conditions, 85 events. 20/85 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 269 event pairs, 0 based on Foata normal form. 0/61 useless extension candidates. Maximal degree in co-relation 49. Up to 6 conditions per place. [2023-11-29 01:16:06,077 INFO L82 GeneralOperation]: Start removeDead. Operand has 45 places, 54 transitions, 115 flow [2023-11-29 01:16:06,080 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 52 transitions, 108 flow [2023-11-29 01:16:06,090 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 01:16:06,096 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;@4b54e31e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 01:16:06,096 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-29 01:16:06,103 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 01:16:06,103 INFO L124 PetriNetUnfolderBase]: 1/18 cut-off events. [2023-11-29 01:16:06,103 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 01:16:06,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:16:06,104 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-29 01:16:06,104 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:16:06,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:16:06,109 INFO L85 PathProgramCache]: Analyzing trace with hash -179892061, now seen corresponding path program 1 times [2023-11-29 01:16:06,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:16:06,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859523783] [2023-11-29 01:16:06,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:16:06,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:16:06,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 01:16:06,231 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-29 01:16:06,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 01:16:06,281 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-29 01:16:06,282 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-29 01:16:06,283 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-11-29 01:16:06,285 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-11-29 01:16:06,285 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-11-29 01:16:06,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 01:16:06,286 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-11-29 01:16:06,289 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-29 01:16:06,290 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-29 01:16:06,312 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-29 01:16:06,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 62 places, 73 transitions, 162 flow [2023-11-29 01:16:06,344 INFO L124 PetriNetUnfolderBase]: 33/142 cut-off events. [2023-11-29 01:16:06,345 INFO L125 PetriNetUnfolderBase]: For 6/7 co-relation queries the response was YES. [2023-11-29 01:16:06,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154 conditions, 142 events. 33/142 cut-off events. For 6/7 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 577 event pairs, 0 based on Foata normal form. 0/103 useless extension candidates. Maximal degree in co-relation 89. Up to 9 conditions per place. [2023-11-29 01:16:06,346 INFO L82 GeneralOperation]: Start removeDead. Operand has 62 places, 73 transitions, 162 flow [2023-11-29 01:16:06,348 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 62 places, 73 transitions, 162 flow [2023-11-29 01:16:06,350 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 01:16:06,351 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;@4b54e31e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 01:16:06,352 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-29 01:16:06,362 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 01:16:06,362 INFO L124 PetriNetUnfolderBase]: 4/48 cut-off events. [2023-11-29 01:16:06,362 INFO L125 PetriNetUnfolderBase]: For 3/4 co-relation queries the response was YES. [2023-11-29 01:16:06,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:16:06,363 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1] [2023-11-29 01:16:06,363 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-29 01:16:06,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:16:06,364 INFO L85 PathProgramCache]: Analyzing trace with hash 962252658, now seen corresponding path program 1 times [2023-11-29 01:16:06,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:16:06,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401059709] [2023-11-29 01:16:06,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:16:06,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:16:06,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 01:16:06,402 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-29 01:16:06,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 01:16:06,437 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-29 01:16:06,438 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-29 01:16:06,438 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-11-29 01:16:06,438 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-11-29 01:16:06,438 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-11-29 01:16:06,439 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-11-29 01:16:06,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 01:16:06,439 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-11-29 01:16:06,440 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-29 01:16:06,440 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-29 01:16:06,466 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-29 01:16:06,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 79 places, 92 transitions, 211 flow [2023-11-29 01:16:06,505 INFO L124 PetriNetUnfolderBase]: 49/210 cut-off events. [2023-11-29 01:16:06,505 INFO L125 PetriNetUnfolderBase]: For 19/21 co-relation queries the response was YES. [2023-11-29 01:16:06,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 235 conditions, 210 events. 49/210 cut-off events. For 19/21 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 928 event pairs, 1 based on Foata normal form. 0/154 useless extension candidates. Maximal degree in co-relation 153. Up to 12 conditions per place. [2023-11-29 01:16:06,508 INFO L82 GeneralOperation]: Start removeDead. Operand has 79 places, 92 transitions, 211 flow [2023-11-29 01:16:06,511 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 79 places, 92 transitions, 211 flow [2023-11-29 01:16:06,513 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 01:16:06,514 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;@4b54e31e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 01:16:06,514 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-29 01:16:06,522 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 01:16:06,523 INFO L124 PetriNetUnfolderBase]: 6/57 cut-off events. [2023-11-29 01:16:06,523 INFO L125 PetriNetUnfolderBase]: For 5/6 co-relation queries the response was YES. [2023-11-29 01:16:06,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:16:06,523 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:16:06,524 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-29 01:16:06,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:16:06,524 INFO L85 PathProgramCache]: Analyzing trace with hash 628503202, now seen corresponding path program 1 times [2023-11-29 01:16:06,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:16:06,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134488878] [2023-11-29 01:16:06,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:16:06,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:16:06,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:16:06,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:16:06,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:16:06,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134488878] [2023-11-29 01:16:06,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134488878] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:16:06,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:16:06,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 01:16:06,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339192002] [2023-11-29 01:16:06,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:16:06,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 01:16:06,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:16:06,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 01:16:06,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 01:16:06,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 92 [2023-11-29 01:16:06,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 92 transitions, 211 flow. Second operand has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 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) [2023-11-29 01:16:06,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:16:06,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 92 [2023-11-29 01:16:06,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:16:14,461 INFO L124 PetriNetUnfolderBase]: 54674/85793 cut-off events. [2023-11-29 01:16:14,461 INFO L125 PetriNetUnfolderBase]: For 1238/1238 co-relation queries the response was YES. [2023-11-29 01:16:14,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162764 conditions, 85793 events. 54674/85793 cut-off events. For 1238/1238 co-relation queries the response was YES. Maximal size of possible extension queue 1670. Compared 709866 event pairs, 17942 based on Foata normal form. 16640/94297 useless extension candidates. Maximal degree in co-relation 44212. Up to 37812 conditions per place. [2023-11-29 01:16:14,889 INFO L140 encePairwiseOnDemand]: 71/92 looper letters, 145 selfloop transitions, 7 changer transitions 0/179 dead transitions. [2023-11-29 01:16:14,889 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 179 transitions, 722 flow [2023-11-29 01:16:14,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 01:16:14,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 01:16:14,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 334 transitions. [2023-11-29 01:16:14,901 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7260869565217392 [2023-11-29 01:16:14,902 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 334 transitions. [2023-11-29 01:16:14,902 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 334 transitions. [2023-11-29 01:16:14,904 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:16:14,906 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 334 transitions. [2023-11-29 01:16:14,909 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 66.8) internal successors, (334), 5 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) [2023-11-29 01:16:14,913 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 92.0) internal successors, (552), 6 states have internal predecessors, (552), 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) [2023-11-29 01:16:14,913 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 92.0) internal successors, (552), 6 states have internal predecessors, (552), 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) [2023-11-29 01:16:14,915 INFO L175 Difference]: Start difference. First operand has 79 places, 92 transitions, 211 flow. Second operand 5 states and 334 transitions. [2023-11-29 01:16:14,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 179 transitions, 722 flow [2023-11-29 01:16:14,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 179 transitions, 722 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-29 01:16:14,924 INFO L231 Difference]: Finished difference. Result has 87 places, 82 transitions, 231 flow [2023-11-29 01:16:14,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=181, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=231, PETRI_PLACES=87, PETRI_TRANSITIONS=82} [2023-11-29 01:16:14,929 INFO L281 CegarLoopForPetriNet]: 79 programPoint places, 8 predicate places. [2023-11-29 01:16:14,929 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 82 transitions, 231 flow [2023-11-29 01:16:14,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 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) [2023-11-29 01:16:14,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:16:14,929 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1] [2023-11-29 01:16:14,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-29 01:16:14,930 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-29 01:16:14,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:16:14,930 INFO L85 PathProgramCache]: Analyzing trace with hash 2111079970, now seen corresponding path program 1 times [2023-11-29 01:16:14,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:16:14,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523246329] [2023-11-29 01:16:14,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:16:14,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:16:14,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 01:16:14,956 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-29 01:16:14,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 01:16:14,976 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-29 01:16:14,976 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-29 01:16:14,977 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-11-29 01:16:14,977 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-11-29 01:16:14,977 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-11-29 01:16:14,978 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-11-29 01:16:14,978 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-11-29 01:16:14,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-29 01:16:14,978 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-29 01:16:14,979 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-29 01:16:14,979 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-29 01:16:15,005 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-29 01:16:15,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 96 places, 111 transitions, 262 flow [2023-11-29 01:16:15,034 INFO L124 PetriNetUnfolderBase]: 73/302 cut-off events. [2023-11-29 01:16:15,034 INFO L125 PetriNetUnfolderBase]: For 48/51 co-relation queries the response was YES. [2023-11-29 01:16:15,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 353 conditions, 302 events. 73/302 cut-off events. For 48/51 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1418 event pairs, 6 based on Foata normal form. 0/225 useless extension candidates. Maximal degree in co-relation 234. Up to 32 conditions per place. [2023-11-29 01:16:15,035 INFO L82 GeneralOperation]: Start removeDead. Operand has 96 places, 111 transitions, 262 flow [2023-11-29 01:16:15,038 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 96 places, 111 transitions, 262 flow [2023-11-29 01:16:15,039 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 01:16:15,040 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;@4b54e31e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 01:16:15,040 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-29 01:16:15,045 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 01:16:15,046 INFO L124 PetriNetUnfolderBase]: 7/68 cut-off events. [2023-11-29 01:16:15,046 INFO L125 PetriNetUnfolderBase]: For 6/8 co-relation queries the response was YES. [2023-11-29 01:16:15,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:16:15,046 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:16:15,046 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-29 01:16:15,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:16:15,047 INFO L85 PathProgramCache]: Analyzing trace with hash -1604149118, now seen corresponding path program 1 times [2023-11-29 01:16:15,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:16:15,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234647101] [2023-11-29 01:16:15,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:16:15,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:16:15,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:16:15,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:16:15,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:16:15,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234647101] [2023-11-29 01:16:15,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234647101] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:16:15,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:16:15,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 01:16:15,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514463602] [2023-11-29 01:16:15,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:16:15,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 01:16:15,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:16:15,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 01:16:15,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 01:16:15,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 111 [2023-11-29 01:16:15,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 111 transitions, 262 flow. Second operand has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 states have internal predecessors, (143), 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) [2023-11-29 01:16:15,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:16:15,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 111 [2023-11-29 01:16:15,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:17:24,330 INFO L124 PetriNetUnfolderBase]: 604848/860925 cut-off events. [2023-11-29 01:17:24,331 INFO L125 PetriNetUnfolderBase]: For 16908/16908 co-relation queries the response was YES. [2023-11-29 01:17:25,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1654317 conditions, 860925 events. 604848/860925 cut-off events. For 16908/16908 co-relation queries the response was YES. Maximal size of possible extension queue 14304. Compared 7678585 event pairs, 197750 based on Foata normal form. 180057/973007 useless extension candidates. Maximal degree in co-relation 223952. Up to 387582 conditions per place. [2023-11-29 01:17:28,830 INFO L140 encePairwiseOnDemand]: 87/111 looper letters, 179 selfloop transitions, 7 changer transitions 0/220 dead transitions. [2023-11-29 01:17:28,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 220 transitions, 903 flow [2023-11-29 01:17:28,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 01:17:28,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 01:17:28,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 415 transitions. [2023-11-29 01:17:28,836 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7477477477477478 [2023-11-29 01:17:28,837 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 415 transitions. [2023-11-29 01:17:28,837 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 415 transitions. [2023-11-29 01:17:28,838 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:17:28,838 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 415 transitions. [2023-11-29 01:17:28,841 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 83.0) internal successors, (415), 5 states have internal predecessors, (415), 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) [2023-11-29 01:17:28,843 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 111.0) internal successors, (666), 6 states have internal predecessors, (666), 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) [2023-11-29 01:17:28,844 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 111.0) internal successors, (666), 6 states have internal predecessors, (666), 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) [2023-11-29 01:17:28,845 INFO L175 Difference]: Start difference. First operand has 96 places, 111 transitions, 262 flow. Second operand 5 states and 415 transitions. [2023-11-29 01:17:28,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 220 transitions, 903 flow [2023-11-29 01:17:28,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 220 transitions, 903 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-29 01:17:28,864 INFO L231 Difference]: Finished difference. Result has 104 places, 98 transitions, 276 flow [2023-11-29 01:17:28,865 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=276, PETRI_PLACES=104, PETRI_TRANSITIONS=98} [2023-11-29 01:17:28,866 INFO L281 CegarLoopForPetriNet]: 96 programPoint places, 8 predicate places. [2023-11-29 01:17:28,867 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 98 transitions, 276 flow [2023-11-29 01:17:28,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 states have internal predecessors, (143), 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) [2023-11-29 01:17:28,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:17:28,868 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:17:28,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-29 01:17:28,868 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-29 01:17:28,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:17:28,869 INFO L85 PathProgramCache]: Analyzing trace with hash -403255812, now seen corresponding path program 1 times [2023-11-29 01:17:28,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:17:28,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683906468] [2023-11-29 01:17:28,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:17:28,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:17:28,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:17:29,089 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 01:17:29,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:17:29,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683906468] [2023-11-29 01:17:29,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683906468] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:17:29,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:17:29,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 01:17:29,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484318360] [2023-11-29 01:17:29,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:17:29,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 01:17:29,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:17:29,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 01:17:29,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 01:17:29,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 111 [2023-11-29 01:17:29,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 98 transitions, 276 flow. Second operand has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 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) [2023-11-29 01:17:29,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:17:29,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 111 [2023-11-29 01:17:29,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand