./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_21-deref_read_racing.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a340643f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_21-deref_read_racing.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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 cb010ae024b402436affeb854f96a5f9e0df3d8ec2cfe8b3a7f33676b7169a2c --- Real Ultimate output --- This is Ultimate 0.2.4-dev-a340643-m [2024-01-27 16:17:45,559 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-27 16:17:45,640 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-27 16:17:45,643 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-27 16:17:45,644 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-27 16:17:45,661 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-27 16:17:45,664 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-27 16:17:45,664 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-27 16:17:45,665 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-27 16:17:45,669 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-27 16:17:45,669 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-27 16:17:45,670 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-27 16:17:45,670 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-27 16:17:45,672 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-27 16:17:45,673 INFO L153 SettingsManager]: * Use SBE=true [2024-01-27 16:17:45,673 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-27 16:17:45,673 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-27 16:17:45,673 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-27 16:17:45,674 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-27 16:17:45,674 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-27 16:17:45,674 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-27 16:17:45,675 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-27 16:17:45,675 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-27 16:17:45,675 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-27 16:17:45,675 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-27 16:17:45,676 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-27 16:17:45,676 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-27 16:17:45,676 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-27 16:17:45,677 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-27 16:17:45,677 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-27 16:17:45,678 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-27 16:17:45,678 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-27 16:17:45,678 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 16:17:45,679 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-27 16:17:45,679 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-27 16:17:45,679 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-27 16:17:45,680 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-27 16:17:45,680 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-27 16:17:45,680 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-27 16:17:45,680 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-27 16:17:45,681 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-27 16:17:45,681 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-27 16:17:45,681 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-27 16:17:45,681 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:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cb010ae024b402436affeb854f96a5f9e0df3d8ec2cfe8b3a7f33676b7169a2c [2024-01-27 16:17:45,951 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-27 16:17:45,980 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-27 16:17:45,982 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-27 16:17:45,983 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-27 16:17:45,984 INFO L274 PluginConnector]: CDTParser initialized [2024-01-27 16:17:45,985 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_21-deref_read_racing.i [2024-01-27 16:17:47,119 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-27 16:17:47,355 INFO L384 CDTParser]: Found 1 translation units. [2024-01-27 16:17:47,356 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_21-deref_read_racing.i [2024-01-27 16:17:47,373 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/106bd663c/93bf103a9f1746a8bb2dd6a5ef407426/FLAG4947b8b59 [2024-01-27 16:17:47,392 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/106bd663c/93bf103a9f1746a8bb2dd6a5ef407426 [2024-01-27 16:17:47,395 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-27 16:17:47,396 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-01-27 16:17:47,398 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-27 16:17:47,398 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-27 16:17:47,404 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-27 16:17:47,405 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 04:17:47" (1/1) ... [2024-01-27 16:17:47,406 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54662b50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:17:47, skipping insertion in model container [2024-01-27 16:17:47,407 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 04:17:47" (1/1) ... [2024-01-27 16:17:47,460 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-01-27 16:17:47,819 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_21-deref_read_racing.i[30176,30189] [2024-01-27 16:17:47,868 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 16:17:47,892 INFO L202 MainTranslator]: Completed pre-run [2024-01-27 16:17:47,941 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_21-deref_read_racing.i[30176,30189] [2024-01-27 16:17:47,954 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 16:17:47,989 INFO L206 MainTranslator]: Completed translation [2024-01-27 16:17:47,989 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:17:47 WrapperNode [2024-01-27 16:17:47,990 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-27 16:17:47,991 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-27 16:17:47,991 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-27 16:17:47,991 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-27 16:17:47,998 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:17:47" (1/1) ... [2024-01-27 16:17:48,015 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:17:47" (1/1) ... [2024-01-27 16:17:48,035 INFO L138 Inliner]: procedures = 171, calls = 39, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 66 [2024-01-27 16:17:48,036 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-27 16:17:48,037 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-27 16:17:48,037 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-27 16:17:48,037 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-27 16:17:48,049 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:17:47" (1/1) ... [2024-01-27 16:17:48,050 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:17:47" (1/1) ... [2024-01-27 16:17:48,065 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:17:47" (1/1) ... [2024-01-27 16:17:48,091 INFO L175 MemorySlicer]: Split 19 memory accesses to 5 slices as follows [2, 5, 6, 5, 1]. 32 percent of accesses are in the largest equivalence class. The 13 initializations are split as follows [2, 5, 1, 5, 0]. The 3 writes are split as follows [0, 0, 2, 0, 1]. [2024-01-27 16:17:48,092 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:17:47" (1/1) ... [2024-01-27 16:17:48,092 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:17:47" (1/1) ... [2024-01-27 16:17:48,103 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:17:47" (1/1) ... [2024-01-27 16:17:48,111 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:17:47" (1/1) ... [2024-01-27 16:17:48,118 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:17:47" (1/1) ... [2024-01-27 16:17:48,125 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:17:47" (1/1) ... [2024-01-27 16:17:48,127 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-27 16:17:48,129 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-27 16:17:48,132 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-27 16:17:48,132 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-27 16:17:48,133 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:17:47" (1/1) ... [2024-01-27 16:17:48,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 16:17:48,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 16:17:48,168 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-01-27 16:17:48,170 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-01-27 16:17:48,218 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-01-27 16:17:48,218 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-01-27 16:17:48,218 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-01-27 16:17:48,218 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-01-27 16:17:48,219 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-01-27 16:17:48,219 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-27 16:17:48,220 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-27 16:17:48,221 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-27 16:17:48,221 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-01-27 16:17:48,221 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-01-27 16:17:48,222 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-01-27 16:17:48,222 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-27 16:17:48,222 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-27 16:17:48,222 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2024-01-27 16:17:48,222 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2024-01-27 16:17:48,222 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-27 16:17:48,223 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-27 16:17:48,223 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-27 16:17:48,223 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-27 16:17:48,224 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-01-27 16:17:48,224 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-01-27 16:17:48,224 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-01-27 16:17:48,224 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-27 16:17:48,225 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-27 16:17:48,227 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-01-27 16:17:48,416 INFO L244 CfgBuilder]: Building ICFG [2024-01-27 16:17:48,419 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-27 16:17:48,668 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-27 16:17:48,670 INFO L293 CfgBuilder]: Performing block encoding [2024-01-27 16:17:48,836 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-27 16:17:48,837 INFO L320 CfgBuilder]: Removed 9 assume(true) statements. [2024-01-27 16:17:48,838 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 04:17:48 BoogieIcfgContainer [2024-01-27 16:17:48,838 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-27 16:17:48,842 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-27 16:17:48,842 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-27 16:17:48,845 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-27 16:17:48,846 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 04:17:47" (1/3) ... [2024-01-27 16:17:48,846 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31099c48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 04:17:48, skipping insertion in model container [2024-01-27 16:17:48,847 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:17:47" (2/3) ... [2024-01-27 16:17:48,847 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31099c48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 04:17:48, skipping insertion in model container [2024-01-27 16:17:48,847 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 04:17:48" (3/3) ... [2024-01-27 16:17:48,849 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_21-deref_read_racing.i [2024-01-27 16:17:48,857 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2024-01-27 16:17:48,866 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-27 16:17:48,866 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-01-27 16:17:48,867 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-27 16:17:48,919 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-01-27 16:17:48,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 36 places, 42 transitions, 88 flow [2024-01-27 16:17:48,983 INFO L124 PetriNetUnfolderBase]: 12/57 cut-off events. [2024-01-27 16:17:48,984 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-27 16:17:48,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61 conditions, 57 events. 12/57 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 160 event pairs, 0 based on Foata normal form. 0/41 useless extension candidates. Maximal degree in co-relation 39. Up to 4 conditions per place. [2024-01-27 16:17:48,991 INFO L82 GeneralOperation]: Start removeDead. Operand has 36 places, 42 transitions, 88 flow [2024-01-27 16:17:48,996 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 36 places, 42 transitions, 88 flow [2024-01-27 16:17:49,011 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-27 16:17:49,019 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;@2c6b4628, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-27 16:17:49,020 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-01-27 16:17:49,029 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-27 16:17:49,029 INFO L124 PetriNetUnfolderBase]: 1/16 cut-off events. [2024-01-27 16:17:49,030 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-27 16:17:49,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:17:49,031 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-01-27 16:17:49,031 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 16:17:49,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:17:49,038 INFO L85 PathProgramCache]: Analyzing trace with hash 307316469, now seen corresponding path program 1 times [2024-01-27 16:17:49,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:17:49,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599872562] [2024-01-27 16:17:49,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:17:49,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:17:49,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-27 16:17:49,176 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-01-27 16:17:49,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-27 16:17:49,227 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-01-27 16:17:49,229 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-01-27 16:17:49,230 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2024-01-27 16:17:49,232 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2024-01-27 16:17:49,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-27 16:17:49,233 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2024-01-27 16:17:49,236 WARN L234 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-01-27 16:17:49,236 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-01-27 16:17:49,253 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-01-27 16:17:49,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 56 places, 66 transitions, 142 flow [2024-01-27 16:17:49,274 INFO L124 PetriNetUnfolderBase]: 21/97 cut-off events. [2024-01-27 16:17:49,274 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-27 16:17:49,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105 conditions, 97 events. 21/97 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 331 event pairs, 0 based on Foata normal form. 0/70 useless extension candidates. Maximal degree in co-relation 62. Up to 6 conditions per place. [2024-01-27 16:17:49,275 INFO L82 GeneralOperation]: Start removeDead. Operand has 56 places, 66 transitions, 142 flow [2024-01-27 16:17:49,277 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 56 places, 66 transitions, 142 flow [2024-01-27 16:17:49,278 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-27 16:17:49,279 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;@2c6b4628, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-27 16:17:49,279 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-01-27 16:17:49,285 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-27 16:17:49,285 INFO L124 PetriNetUnfolderBase]: 1/20 cut-off events. [2024-01-27 16:17:49,285 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-01-27 16:17:49,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:17:49,285 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-01-27 16:17:49,286 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 16:17:49,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:17:49,286 INFO L85 PathProgramCache]: Analyzing trace with hash -2035548026, now seen corresponding path program 1 times [2024-01-27 16:17:49,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:17:49,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849070575] [2024-01-27 16:17:49,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:17:49,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:17:49,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:17:49,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 16:17:49,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 16:17:49,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849070575] [2024-01-27 16:17:49,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849070575] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 16:17:49,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 16:17:49,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-27 16:17:49,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715004848] [2024-01-27 16:17:49,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 16:17:49,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-27 16:17:49,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 16:17:49,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-27 16:17:49,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-27 16:17:49,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 66 [2024-01-27 16:17:49,560 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 66 transitions, 142 flow. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 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) [2024-01-27 16:17:49,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 16:17:49,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 66 [2024-01-27 16:17:49,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 16:17:50,140 INFO L124 PetriNetUnfolderBase]: 1602/3295 cut-off events. [2024-01-27 16:17:50,142 INFO L125 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2024-01-27 16:17:50,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5925 conditions, 3295 events. 1602/3295 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 22894 event pairs, 1496 based on Foata normal form. 951/4054 useless extension candidates. Maximal degree in co-relation 4337. Up to 2583 conditions per place. [2024-01-27 16:17:50,163 INFO L140 encePairwiseOnDemand]: 48/66 looper letters, 35 selfloop transitions, 2 changer transitions 5/62 dead transitions. [2024-01-27 16:17:50,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 62 transitions, 214 flow [2024-01-27 16:17:50,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-27 16:17:50,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-27 16:17:50,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 128 transitions. [2024-01-27 16:17:50,181 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6464646464646465 [2024-01-27 16:17:50,183 INFO L175 Difference]: Start difference. First operand has 56 places, 66 transitions, 142 flow. Second operand 3 states and 128 transitions. [2024-01-27 16:17:50,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 62 transitions, 214 flow [2024-01-27 16:17:50,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 62 transitions, 214 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-01-27 16:17:50,192 INFO L231 Difference]: Finished difference. Result has 59 places, 47 transitions, 114 flow [2024-01-27 16:17:50,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=114, PETRI_PLACES=59, PETRI_TRANSITIONS=47} [2024-01-27 16:17:50,197 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 3 predicate places. [2024-01-27 16:17:50,198 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 47 transitions, 114 flow [2024-01-27 16:17:50,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 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) [2024-01-27 16:17:50,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:17:50,199 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1] [2024-01-27 16:17:50,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-01-27 16:17:50,200 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 16:17:50,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:17:50,201 INFO L85 PathProgramCache]: Analyzing trace with hash 2055035214, now seen corresponding path program 1 times [2024-01-27 16:17:50,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:17:50,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18556446] [2024-01-27 16:17:50,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:17:50,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:17:50,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-27 16:17:50,244 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-01-27 16:17:50,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-27 16:17:50,279 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-01-27 16:17:50,280 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-01-27 16:17:50,280 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2024-01-27 16:17:50,280 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2024-01-27 16:17:50,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-01-27 16:17:50,281 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2024-01-27 16:17:50,282 WARN L234 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-01-27 16:17:50,282 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-01-27 16:17:50,300 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-01-27 16:17:50,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 76 places, 90 transitions, 198 flow [2024-01-27 16:17:50,315 INFO L124 PetriNetUnfolderBase]: 30/137 cut-off events. [2024-01-27 16:17:50,315 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-01-27 16:17:50,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 150 conditions, 137 events. 30/137 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 509 event pairs, 0 based on Foata normal form. 0/99 useless extension candidates. Maximal degree in co-relation 104. Up to 8 conditions per place. [2024-01-27 16:17:50,316 INFO L82 GeneralOperation]: Start removeDead. Operand has 76 places, 90 transitions, 198 flow [2024-01-27 16:17:50,318 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 76 places, 90 transitions, 198 flow [2024-01-27 16:17:50,319 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-27 16:17:50,320 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;@2c6b4628, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-27 16:17:50,320 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-01-27 16:17:50,323 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-27 16:17:50,323 INFO L124 PetriNetUnfolderBase]: 1/20 cut-off events. [2024-01-27 16:17:50,323 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-01-27 16:17:50,324 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:17:50,324 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-01-27 16:17:50,324 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 16:17:50,324 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:17:50,325 INFO L85 PathProgramCache]: Analyzing trace with hash 626963014, now seen corresponding path program 1 times [2024-01-27 16:17:50,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:17:50,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994724799] [2024-01-27 16:17:50,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:17:50,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:17:50,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:17:50,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 16:17:50,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 16:17:50,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994724799] [2024-01-27 16:17:50,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994724799] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 16:17:50,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 16:17:50,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-27 16:17:50,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748299228] [2024-01-27 16:17:50,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 16:17:50,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-27 16:17:50,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 16:17:50,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-27 16:17:50,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-27 16:17:50,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 90 [2024-01-27 16:17:50,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 90 transitions, 198 flow. Second operand has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 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) [2024-01-27 16:17:50,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 16:17:50,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 90 [2024-01-27 16:17:50,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 16:17:54,785 INFO L124 PetriNetUnfolderBase]: 25002/41893 cut-off events. [2024-01-27 16:17:54,785 INFO L125 PetriNetUnfolderBase]: For 682/682 co-relation queries the response was YES. [2024-01-27 16:17:54,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77324 conditions, 41893 events. 25002/41893 cut-off events. For 682/682 co-relation queries the response was YES. Maximal size of possible extension queue 1241. Compared 354579 event pairs, 24993 based on Foata normal form. 13350/53199 useless extension candidates. Maximal degree in co-relation 44644. Up to 34983 conditions per place. [2024-01-27 16:17:55,036 INFO L140 encePairwiseOnDemand]: 66/90 looper letters, 45 selfloop transitions, 2 changer transitions 5/80 dead transitions. [2024-01-27 16:17:55,037 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 80 transitions, 278 flow [2024-01-27 16:17:55,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-27 16:17:55,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-27 16:17:55,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 168 transitions. [2024-01-27 16:17:55,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6222222222222222 [2024-01-27 16:17:55,042 INFO L175 Difference]: Start difference. First operand has 76 places, 90 transitions, 198 flow. Second operand 3 states and 168 transitions. [2024-01-27 16:17:55,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 80 transitions, 278 flow [2024-01-27 16:17:55,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 80 transitions, 276 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-01-27 16:17:55,047 INFO L231 Difference]: Finished difference. Result has 79 places, 65 transitions, 156 flow [2024-01-27 16:17:55,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=90, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=156, PETRI_PLACES=79, PETRI_TRANSITIONS=65} [2024-01-27 16:17:55,049 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 3 predicate places. [2024-01-27 16:17:55,049 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 65 transitions, 156 flow [2024-01-27 16:17:55,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 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) [2024-01-27 16:17:55,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:17:55,050 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 16:17:55,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-01-27 16:17:55,051 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 16:17:55,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:17:55,052 INFO L85 PathProgramCache]: Analyzing trace with hash 402122577, now seen corresponding path program 1 times [2024-01-27 16:17:55,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:17:55,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977930000] [2024-01-27 16:17:55,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:17:55,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:17:55,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:17:55,131 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 16:17:55,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 16:17:55,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977930000] [2024-01-27 16:17:55,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977930000] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 16:17:55,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209774701] [2024-01-27 16:17:55,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:17:55,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 16:17:55,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 16:17:55,135 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 16:17:55,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-01-27 16:17:55,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:17:55,231 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 3 conjunts are in the unsatisfiable core [2024-01-27 16:17:55,232 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 16:17:55,267 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 16:17:55,267 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 16:17:55,285 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 16:17:55,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209774701] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 16:17:55,286 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 16:17:55,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-01-27 16:17:55,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96611056] [2024-01-27 16:17:55,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 16:17:55,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-27 16:17:55,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 16:17:55,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-27 16:17:55,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-01-27 16:17:55,289 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 90 [2024-01-27 16:17:55,290 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 65 transitions, 156 flow. Second operand has 7 states, 7 states have (on average 32.285714285714285) internal successors, (226), 7 states have internal predecessors, (226), 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) [2024-01-27 16:17:55,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 16:17:55,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 90 [2024-01-27 16:17:55,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 16:17:56,502 INFO L124 PetriNetUnfolderBase]: 7668/12908 cut-off events. [2024-01-27 16:17:56,502 INFO L125 PetriNetUnfolderBase]: For 4399/4399 co-relation queries the response was YES. [2024-01-27 16:17:56,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25368 conditions, 12908 events. 7668/12908 cut-off events. For 4399/4399 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 97507 event pairs, 880 based on Foata normal form. 1110/13594 useless extension candidates. Maximal degree in co-relation 2598. Up to 7400 conditions per place. [2024-01-27 16:17:56,608 INFO L140 encePairwiseOnDemand]: 87/90 looper letters, 88 selfloop transitions, 4 changer transitions 0/117 dead transitions. [2024-01-27 16:17:56,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 117 transitions, 444 flow [2024-01-27 16:17:56,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-27 16:17:56,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-27 16:17:56,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 275 transitions. [2024-01-27 16:17:56,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5092592592592593 [2024-01-27 16:17:56,613 INFO L175 Difference]: Start difference. First operand has 79 places, 65 transitions, 156 flow. Second operand 6 states and 275 transitions. [2024-01-27 16:17:56,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 117 transitions, 444 flow [2024-01-27 16:17:56,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 117 transitions, 442 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-27 16:17:56,622 INFO L231 Difference]: Finished difference. Result has 72 places, 60 transitions, 152 flow [2024-01-27 16:17:56,622 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=90, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=152, PETRI_PLACES=72, PETRI_TRANSITIONS=60} [2024-01-27 16:17:56,624 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, -4 predicate places. [2024-01-27 16:17:56,624 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 60 transitions, 152 flow [2024-01-27 16:17:56,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 32.285714285714285) internal successors, (226), 7 states have internal predecessors, (226), 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) [2024-01-27 16:17:56,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:17:56,625 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1] [2024-01-27 16:17:56,646 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-01-27 16:17:56,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 16:17:56,843 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 16:17:56,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:17:56,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1075982636, now seen corresponding path program 1 times [2024-01-27 16:17:56,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:17:56,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312504034] [2024-01-27 16:17:56,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:17:56,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:17:56,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-27 16:17:56,875 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-01-27 16:17:56,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-27 16:17:56,903 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-01-27 16:17:56,903 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-01-27 16:17:56,903 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2024-01-27 16:17:56,904 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2024-01-27 16:17:56,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-01-27 16:17:56,904 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2024-01-27 16:17:56,905 WARN L234 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2024-01-27 16:17:56,905 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2024-01-27 16:17:56,936 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-01-27 16:17:56,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 96 places, 114 transitions, 256 flow [2024-01-27 16:17:56,954 INFO L124 PetriNetUnfolderBase]: 39/177 cut-off events. [2024-01-27 16:17:56,954 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-01-27 16:17:56,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 196 conditions, 177 events. 39/177 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 707 event pairs, 0 based on Foata normal form. 0/128 useless extension candidates. Maximal degree in co-relation 149. Up to 10 conditions per place. [2024-01-27 16:17:56,956 INFO L82 GeneralOperation]: Start removeDead. Operand has 96 places, 114 transitions, 256 flow [2024-01-27 16:17:56,958 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 96 places, 114 transitions, 256 flow [2024-01-27 16:17:56,959 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-27 16:17:56,965 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;@2c6b4628, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-27 16:17:56,967 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-01-27 16:17:56,969 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-27 16:17:56,970 INFO L124 PetriNetUnfolderBase]: 1/20 cut-off events. [2024-01-27 16:17:56,970 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-01-27 16:17:56,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:17:56,970 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-01-27 16:17:56,970 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 16:17:56,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:17:56,971 INFO L85 PathProgramCache]: Analyzing trace with hash -295490298, now seen corresponding path program 1 times [2024-01-27 16:17:56,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:17:56,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232639460] [2024-01-27 16:17:56,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:17:56,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:17:56,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:17:57,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 16:17:57,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 16:17:57,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232639460] [2024-01-27 16:17:57,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232639460] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 16:17:57,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 16:17:57,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-27 16:17:57,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932897825] [2024-01-27 16:17:57,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 16:17:57,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-27 16:17:57,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 16:17:57,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-27 16:17:57,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-27 16:17:57,013 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 114 [2024-01-27 16:17:57,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 114 transitions, 256 flow. Second operand has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 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) [2024-01-27 16:17:57,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 16:17:57,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 114 [2024-01-27 16:17:57,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand