./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_73-funloop_hard_racefree.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_73-funloop_hard_racefree.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 c8af2e9e80aefb6a93651d6c869df13510f679bd9566c8571973545c9393aab5 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-a340643-m [2024-01-27 15:13:09,222 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-27 15:13:09,295 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-27 15:13:09,300 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-27 15:13:09,301 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-27 15:13:09,325 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-27 15:13:09,327 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-27 15:13:09,328 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-27 15:13:09,328 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-27 15:13:09,331 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-27 15:13:09,332 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-27 15:13:09,332 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-27 15:13:09,333 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-27 15:13:09,334 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-27 15:13:09,334 INFO L153 SettingsManager]: * Use SBE=true [2024-01-27 15:13:09,334 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-27 15:13:09,334 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-27 15:13:09,334 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-27 15:13:09,335 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-27 15:13:09,335 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-27 15:13:09,335 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-27 15:13:09,335 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-27 15:13:09,336 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-27 15:13:09,336 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-27 15:13:09,336 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-27 15:13:09,336 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-27 15:13:09,336 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-27 15:13:09,336 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-27 15:13:09,337 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-27 15:13:09,337 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-27 15:13:09,338 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-27 15:13:09,338 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-27 15:13:09,338 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 15:13:09,338 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-27 15:13:09,339 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-27 15:13:09,339 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-27 15:13:09,339 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-27 15:13:09,339 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-27 15:13:09,339 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-27 15:13:09,339 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-27 15:13:09,340 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-27 15:13:09,340 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-27 15:13:09,340 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-27 15:13:09,340 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c8af2e9e80aefb6a93651d6c869df13510f679bd9566c8571973545c9393aab5 [2024-01-27 15:13:09,619 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-27 15:13:09,643 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-27 15:13:09,645 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-27 15:13:09,646 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-27 15:13:09,646 INFO L274 PluginConnector]: CDTParser initialized [2024-01-27 15:13:09,647 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_73-funloop_hard_racefree.i [2024-01-27 15:13:10,721 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-27 15:13:10,950 INFO L384 CDTParser]: Found 1 translation units. [2024-01-27 15:13:10,951 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_73-funloop_hard_racefree.i [2024-01-27 15:13:10,978 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2211c389b/2881fdd729cf413ca660fb73646fc331/FLAGb285a4e30 [2024-01-27 15:13:10,993 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2211c389b/2881fdd729cf413ca660fb73646fc331 [2024-01-27 15:13:10,996 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-27 15:13:10,997 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-01-27 15:13:10,998 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-27 15:13:10,998 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-27 15:13:11,003 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-27 15:13:11,004 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 03:13:10" (1/1) ... [2024-01-27 15:13:11,005 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f2a3cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:13:11, skipping insertion in model container [2024-01-27 15:13:11,005 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 03:13:10" (1/1) ... [2024-01-27 15:13:11,062 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-01-27 15:13:11,519 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_73-funloop_hard_racefree.i[41323,41336] [2024-01-27 15:13:11,556 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 15:13:11,577 INFO L202 MainTranslator]: Completed pre-run [2024-01-27 15:13:11,607 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_73-funloop_hard_racefree.i[41323,41336] [2024-01-27 15:13:11,630 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 15:13:11,679 INFO L206 MainTranslator]: Completed translation [2024-01-27 15:13:11,679 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:13:11 WrapperNode [2024-01-27 15:13:11,680 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-27 15:13:11,681 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-27 15:13:11,681 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-27 15:13:11,682 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-27 15:13:11,687 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:13:11" (1/1) ... [2024-01-27 15:13:11,713 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:13:11" (1/1) ... [2024-01-27 15:13:11,758 INFO L138 Inliner]: procedures = 272, calls = 49, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 285 [2024-01-27 15:13:11,758 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-27 15:13:11,759 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-27 15:13:11,759 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-27 15:13:11,759 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-27 15:13:11,767 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:13:11" (1/1) ... [2024-01-27 15:13:11,768 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:13:11" (1/1) ... [2024-01-27 15:13:11,784 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:13:11" (1/1) ... [2024-01-27 15:13:11,802 INFO L175 MemorySlicer]: Split 25 memory accesses to 4 slices as follows [2, 2, 5, 16]. 64 percent of accesses are in the largest equivalence class. The 7 initializations are split as follows [2, 0, 5, 0]. The 8 writes are split as follows [0, 1, 0, 7]. [2024-01-27 15:13:11,804 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:13:11" (1/1) ... [2024-01-27 15:13:11,804 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:13:11" (1/1) ... [2024-01-27 15:13:11,812 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:13:11" (1/1) ... [2024-01-27 15:13:11,821 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:13:11" (1/1) ... [2024-01-27 15:13:11,823 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:13:11" (1/1) ... [2024-01-27 15:13:11,824 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:13:11" (1/1) ... [2024-01-27 15:13:11,826 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-27 15:13:11,827 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-27 15:13:11,827 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-27 15:13:11,827 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-27 15:13:11,828 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:13:11" (1/1) ... [2024-01-27 15:13:11,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 15:13:11,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:13:11,853 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 15:13:11,863 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 15:13:11,972 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-27 15:13:11,973 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-27 15:13:11,973 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-01-27 15:13:11,973 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-01-27 15:13:11,973 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-01-27 15:13:11,973 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-01-27 15:13:11,975 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-01-27 15:13:11,975 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-27 15:13:11,975 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-27 15:13:11,975 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-27 15:13:11,975 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-01-27 15:13:11,976 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-01-27 15:13:11,976 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-27 15:13:11,976 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2024-01-27 15:13:11,976 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2024-01-27 15:13:11,976 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-27 15:13:11,976 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-27 15:13:11,977 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-27 15:13:11,977 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-01-27 15:13:11,977 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-27 15:13:11,977 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-27 15:13:11,979 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 15:13:12,181 INFO L244 CfgBuilder]: Building ICFG [2024-01-27 15:13:12,183 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-27 15:13:12,494 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-27 15:13:12,494 INFO L293 CfgBuilder]: Performing block encoding [2024-01-27 15:13:12,623 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-27 15:13:12,624 INFO L320 CfgBuilder]: Removed 35 assume(true) statements. [2024-01-27 15:13:12,624 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 03:13:12 BoogieIcfgContainer [2024-01-27 15:13:12,624 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-27 15:13:12,626 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-27 15:13:12,626 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-27 15:13:12,628 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-27 15:13:12,628 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 03:13:10" (1/3) ... [2024-01-27 15:13:12,629 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b29dcbe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 03:13:12, skipping insertion in model container [2024-01-27 15:13:12,629 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:13:11" (2/3) ... [2024-01-27 15:13:12,629 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b29dcbe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 03:13:12, skipping insertion in model container [2024-01-27 15:13:12,629 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 03:13:12" (3/3) ... [2024-01-27 15:13:12,630 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_73-funloop_hard_racefree.i [2024-01-27 15:13:12,636 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2024-01-27 15:13:12,643 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-27 15:13:12,643 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-01-27 15:13:12,643 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-27 15:13:12,719 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2024-01-27 15:13:12,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 100 places, 137 transitions, 281 flow [2024-01-27 15:13:12,805 INFO L124 PetriNetUnfolderBase]: 65/223 cut-off events. [2024-01-27 15:13:12,806 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-01-27 15:13:12,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 228 conditions, 223 events. 65/223 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1052 event pairs, 0 based on Foata normal form. 0/150 useless extension candidates. Maximal degree in co-relation 130. Up to 8 conditions per place. [2024-01-27 15:13:12,813 INFO L82 GeneralOperation]: Start removeDead. Operand has 100 places, 137 transitions, 281 flow [2024-01-27 15:13:12,820 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 99 places, 135 transitions, 274 flow [2024-01-27 15:13:12,827 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-27 15:13:12,832 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;@36ed756d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-27 15:13:12,833 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-01-27 15:13:12,837 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-27 15:13:12,837 INFO L124 PetriNetUnfolderBase]: 1/19 cut-off events. [2024-01-27 15:13:12,837 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-27 15:13:12,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:13:12,838 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2024-01-27 15:13:12,838 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-01-27 15:13:12,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:13:12,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1488862132, now seen corresponding path program 1 times [2024-01-27 15:13:12,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:13:12,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346186105] [2024-01-27 15:13:12,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:13:12,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:13:12,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:13:13,070 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-27 15:13:13,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:13:13,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346186105] [2024-01-27 15:13:13,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346186105] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:13:13,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:13:13,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-27 15:13:13,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481888619] [2024-01-27 15:13:13,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:13:13,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-27 15:13:13,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:13:13,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-27 15:13:13,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-27 15:13:13,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 137 [2024-01-27 15:13:13,115 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 135 transitions, 274 flow. Second operand has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 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 15:13:13,115 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:13:13,115 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 137 [2024-01-27 15:13:13,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:13:13,443 INFO L124 PetriNetUnfolderBase]: 823/2254 cut-off events. [2024-01-27 15:13:13,444 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-27 15:13:13,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3803 conditions, 2254 events. 823/2254 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 16735 event pairs, 684 based on Foata normal form. 541/2536 useless extension candidates. Maximal degree in co-relation 3684. Up to 1544 conditions per place. [2024-01-27 15:13:13,455 INFO L140 encePairwiseOnDemand]: 101/137 looper letters, 61 selfloop transitions, 2 changer transitions 0/103 dead transitions. [2024-01-27 15:13:13,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 103 transitions, 336 flow [2024-01-27 15:13:13,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-27 15:13:13,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-27 15:13:13,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 217 transitions. [2024-01-27 15:13:13,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5279805352798054 [2024-01-27 15:13:13,466 INFO L175 Difference]: Start difference. First operand has 99 places, 135 transitions, 274 flow. Second operand 3 states and 217 transitions. [2024-01-27 15:13:13,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 103 transitions, 336 flow [2024-01-27 15:13:13,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 103 transitions, 336 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-01-27 15:13:13,472 INFO L231 Difference]: Finished difference. Result has 102 places, 103 transitions, 220 flow [2024-01-27 15:13:13,473 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=220, PETRI_PLACES=102, PETRI_TRANSITIONS=103} [2024-01-27 15:13:13,475 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, 3 predicate places. [2024-01-27 15:13:13,476 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 103 transitions, 220 flow [2024-01-27 15:13:13,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 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 15:13:13,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:13:13,476 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2024-01-27 15:13:13,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-27 15:13:13,477 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-01-27 15:13:13,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:13:13,477 INFO L85 PathProgramCache]: Analyzing trace with hash -1402943852, now seen corresponding path program 1 times [2024-01-27 15:13:13,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:13:13,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096451468] [2024-01-27 15:13:13,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:13:13,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:13:13,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:13:13,528 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-27 15:13:13,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:13:13,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096451468] [2024-01-27 15:13:13,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096451468] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:13:13,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124410019] [2024-01-27 15:13:13,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:13:13,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:13:13,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:13:13,530 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 15:13:13,555 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 15:13:13,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:13:13,628 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 3 conjunts are in the unsatisfiable core [2024-01-27 15:13:13,632 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:13:13,657 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-27 15:13:13,658 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:13:13,671 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-27 15:13:13,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124410019] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:13:13,673 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:13:13,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-01-27 15:13:13,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048095340] [2024-01-27 15:13:13,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:13:13,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-27 15:13:13,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:13:13,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-27 15:13:13,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-01-27 15:13:13,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 137 [2024-01-27 15:13:13,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 103 transitions, 220 flow. Second operand has 7 states, 7 states have (on average 41.57142857142857) internal successors, (291), 7 states have internal predecessors, (291), 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 15:13:13,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:13:13,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 137 [2024-01-27 15:13:13,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:13:13,945 INFO L124 PetriNetUnfolderBase]: 823/2257 cut-off events. [2024-01-27 15:13:13,946 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-27 15:13:13,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3819 conditions, 2257 events. 823/2257 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 16738 event pairs, 684 based on Foata normal form. 0/1998 useless extension candidates. Maximal degree in co-relation 3807. Up to 1544 conditions per place. [2024-01-27 15:13:13,955 INFO L140 encePairwiseOnDemand]: 134/137 looper letters, 61 selfloop transitions, 5 changer transitions 0/106 dead transitions. [2024-01-27 15:13:13,955 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 106 transitions, 364 flow [2024-01-27 15:13:13,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-27 15:13:13,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-27 15:13:13,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 309 transitions. [2024-01-27 15:13:13,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3759124087591241 [2024-01-27 15:13:13,957 INFO L175 Difference]: Start difference. First operand has 102 places, 103 transitions, 220 flow. Second operand 6 states and 309 transitions. [2024-01-27 15:13:13,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 106 transitions, 364 flow [2024-01-27 15:13:13,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 106 transitions, 360 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-01-27 15:13:13,960 INFO L231 Difference]: Finished difference. Result has 109 places, 106 transitions, 252 flow [2024-01-27 15:13:13,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=252, PETRI_PLACES=109, PETRI_TRANSITIONS=106} [2024-01-27 15:13:13,961 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, 10 predicate places. [2024-01-27 15:13:13,961 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 106 transitions, 252 flow [2024-01-27 15:13:13,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 41.57142857142857) internal successors, (291), 7 states have internal predecessors, (291), 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 15:13:13,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:13:13,962 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2024-01-27 15:13:13,990 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 15:13:14,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:13:14,173 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-01-27 15:13:14,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:13:14,174 INFO L85 PathProgramCache]: Analyzing trace with hash 2014582348, now seen corresponding path program 2 times [2024-01-27 15:13:14,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:13:14,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883154898] [2024-01-27 15:13:14,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:13:14,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:13:14,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:13:14,319 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-27 15:13:14,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:13:14,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883154898] [2024-01-27 15:13:14,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883154898] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:13:14,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526117870] [2024-01-27 15:13:14,325 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:13:14,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:13:14,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:13:14,332 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:13:14,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-01-27 15:13:14,418 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:13:14,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:13:14,419 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-27 15:13:14,420 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:13:14,433 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-27 15:13:14,433 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:13:14,476 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-27 15:13:14,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526117870] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:13:14,477 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:13:14,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-01-27 15:13:14,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469102018] [2024-01-27 15:13:14,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:13:14,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-01-27 15:13:14,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:13:14,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-01-27 15:13:14,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-01-27 15:13:14,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 137 [2024-01-27 15:13:14,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 106 transitions, 252 flow. Second operand has 13 states, 13 states have (on average 41.30769230769231) internal successors, (537), 13 states have internal predecessors, (537), 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 15:13:14,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:13:14,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 137 [2024-01-27 15:13:14,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:13:14,718 INFO L124 PetriNetUnfolderBase]: 823/2263 cut-off events. [2024-01-27 15:13:14,718 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2024-01-27 15:13:14,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3856 conditions, 2263 events. 823/2263 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 16730 event pairs, 684 based on Foata normal form. 6/2011 useless extension candidates. Maximal degree in co-relation 3798. Up to 1544 conditions per place. [2024-01-27 15:13:14,728 INFO L140 encePairwiseOnDemand]: 134/137 looper letters, 61 selfloop transitions, 11 changer transitions 0/112 dead transitions. [2024-01-27 15:13:14,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 112 transitions, 432 flow [2024-01-27 15:13:14,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-01-27 15:13:14,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-01-27 15:13:14,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 558 transitions. [2024-01-27 15:13:14,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33941605839416056 [2024-01-27 15:13:14,731 INFO L175 Difference]: Start difference. First operand has 109 places, 106 transitions, 252 flow. Second operand 12 states and 558 transitions. [2024-01-27 15:13:14,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 112 transitions, 432 flow [2024-01-27 15:13:14,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 112 transitions, 418 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-01-27 15:13:14,736 INFO L231 Difference]: Finished difference. Result has 125 places, 112 transitions, 322 flow [2024-01-27 15:13:14,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=322, PETRI_PLACES=125, PETRI_TRANSITIONS=112} [2024-01-27 15:13:14,737 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, 26 predicate places. [2024-01-27 15:13:14,737 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 112 transitions, 322 flow [2024-01-27 15:13:14,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 41.30769230769231) internal successors, (537), 13 states have internal predecessors, (537), 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 15:13:14,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:13:14,738 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1] [2024-01-27 15:13:14,763 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-01-27 15:13:14,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2024-01-27 15:13:14,952 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-01-27 15:13:14,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:13:14,953 INFO L85 PathProgramCache]: Analyzing trace with hash 1525985612, now seen corresponding path program 3 times [2024-01-27 15:13:14,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:13:14,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831182562] [2024-01-27 15:13:14,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:13:14,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:13:15,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-27 15:13:15,000 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-01-27 15:13:15,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-27 15:13:15,043 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-01-27 15:13:15,043 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-01-27 15:13:15,044 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2024-01-27 15:13:15,047 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2024-01-27 15:13:15,047 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2024-01-27 15:13:15,048 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2024-01-27 15:13:15,048 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2024-01-27 15:13:15,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-01-27 15:13:15,048 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2024-01-27 15:13:15,050 WARN L234 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-01-27 15:13:15,050 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-01-27 15:13:15,080 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-01-27 15:13:15,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 133 places, 182 transitions, 380 flow [2024-01-27 15:13:15,103 INFO L124 PetriNetUnfolderBase]: 105/361 cut-off events. [2024-01-27 15:13:15,103 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-01-27 15:13:15,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 373 conditions, 361 events. 105/361 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1960 event pairs, 0 based on Foata normal form. 0/244 useless extension candidates. Maximal degree in co-relation 225. Up to 12 conditions per place. [2024-01-27 15:13:15,105 INFO L82 GeneralOperation]: Start removeDead. Operand has 133 places, 182 transitions, 380 flow [2024-01-27 15:13:15,109 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 133 places, 182 transitions, 380 flow [2024-01-27 15:13:15,110 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-27 15:13:15,114 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;@36ed756d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-27 15:13:15,115 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-01-27 15:13:15,120 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-27 15:13:15,120 INFO L124 PetriNetUnfolderBase]: 10/65 cut-off events. [2024-01-27 15:13:15,120 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-27 15:13:15,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:13:15,120 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1] [2024-01-27 15:13:15,120 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2024-01-27 15:13:15,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:13:15,121 INFO L85 PathProgramCache]: Analyzing trace with hash -1934357080, now seen corresponding path program 1 times [2024-01-27 15:13:15,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:13:15,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738819304] [2024-01-27 15:13:15,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:13:15,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:13:15,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:13:15,159 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-01-27 15:13:15,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:13:15,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738819304] [2024-01-27 15:13:15,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738819304] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:13:15,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:13:15,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-27 15:13:15,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11910714] [2024-01-27 15:13:15,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:13:15,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-27 15:13:15,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:13:15,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-27 15:13:15,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-27 15:13:15,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 182 [2024-01-27 15:13:15,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 182 transitions, 380 flow. Second operand has 3 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 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 15:13:15,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:13:15,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 182 [2024-01-27 15:13:15,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:13:19,081 INFO L124 PetriNetUnfolderBase]: 31325/60557 cut-off events. [2024-01-27 15:13:19,101 INFO L125 PetriNetUnfolderBase]: For 103/103 co-relation queries the response was YES. [2024-01-27 15:13:19,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105651 conditions, 60557 events. 31325/60557 cut-off events. For 103/103 co-relation queries the response was YES. Maximal size of possible extension queue 1763. Compared 608992 event pairs, 27108 based on Foata normal form. 15651/69105 useless extension candidates. Maximal degree in co-relation 85934. Up to 44991 conditions per place. [2024-01-27 15:13:19,423 INFO L140 encePairwiseOnDemand]: 135/182 looper letters, 84 selfloop transitions, 2 changer transitions 0/139 dead transitions. [2024-01-27 15:13:19,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 139 transitions, 466 flow [2024-01-27 15:13:19,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-27 15:13:19,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-27 15:13:19,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 290 transitions. [2024-01-27 15:13:19,425 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5311355311355311 [2024-01-27 15:13:19,425 INFO L175 Difference]: Start difference. First operand has 133 places, 182 transitions, 380 flow. Second operand 3 states and 290 transitions. [2024-01-27 15:13:19,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 139 transitions, 466 flow [2024-01-27 15:13:19,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 139 transitions, 466 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-01-27 15:13:19,429 INFO L231 Difference]: Finished difference. Result has 136 places, 139 transitions, 304 flow [2024-01-27 15:13:19,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=182, PETRI_DIFFERENCE_MINUEND_FLOW=292, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=304, PETRI_PLACES=136, PETRI_TRANSITIONS=139} [2024-01-27 15:13:19,430 INFO L281 CegarLoopForPetriNet]: 133 programPoint places, 3 predicate places. [2024-01-27 15:13:19,430 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 139 transitions, 304 flow [2024-01-27 15:13:19,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 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 15:13:19,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:13:19,431 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1] [2024-01-27 15:13:19,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-01-27 15:13:19,431 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2024-01-27 15:13:19,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:13:19,431 INFO L85 PathProgramCache]: Analyzing trace with hash 1523948438, now seen corresponding path program 1 times [2024-01-27 15:13:19,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:13:19,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675471096] [2024-01-27 15:13:19,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:13:19,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:13:19,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:13:19,463 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-01-27 15:13:19,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:13:19,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675471096] [2024-01-27 15:13:19,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675471096] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:13:19,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055973042] [2024-01-27 15:13:19,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:13:19,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:13:19,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:13:19,489 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:13:19,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-01-27 15:13:19,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:13:19,576 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 3 conjunts are in the unsatisfiable core [2024-01-27 15:13:19,577 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:13:19,585 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-01-27 15:13:19,585 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:13:19,596 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-01-27 15:13:19,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055973042] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:13:19,597 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:13:19,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-01-27 15:13:19,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297975934] [2024-01-27 15:13:19,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:13:19,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-27 15:13:19,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:13:19,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-27 15:13:19,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-01-27 15:13:19,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 182 [2024-01-27 15:13:19,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 139 transitions, 304 flow. Second operand has 7 states, 7 states have (on average 54.714285714285715) internal successors, (383), 7 states have internal predecessors, (383), 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 15:13:19,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:13:19,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 182 [2024-01-27 15:13:19,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:13:23,277 INFO L124 PetriNetUnfolderBase]: 31325/60560 cut-off events. [2024-01-27 15:13:23,277 INFO L125 PetriNetUnfolderBase]: For 103/103 co-relation queries the response was YES. [2024-01-27 15:13:23,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105667 conditions, 60560 events. 31325/60560 cut-off events. For 103/103 co-relation queries the response was YES. Maximal size of possible extension queue 1763. Compared 608982 event pairs, 27108 based on Foata normal form. 0/53457 useless extension candidates. Maximal degree in co-relation 105654. Up to 44991 conditions per place. [2024-01-27 15:13:23,553 INFO L140 encePairwiseOnDemand]: 179/182 looper letters, 84 selfloop transitions, 5 changer transitions 0/142 dead transitions. [2024-01-27 15:13:23,553 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 142 transitions, 494 flow [2024-01-27 15:13:23,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-27 15:13:23,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-27 15:13:23,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 410 transitions. [2024-01-27 15:13:23,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37545787545787546 [2024-01-27 15:13:23,556 INFO L175 Difference]: Start difference. First operand has 136 places, 139 transitions, 304 flow. Second operand 6 states and 410 transitions. [2024-01-27 15:13:23,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 142 transitions, 494 flow [2024-01-27 15:13:23,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 142 transitions, 490 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-01-27 15:13:23,559 INFO L231 Difference]: Finished difference. Result has 143 places, 142 transitions, 336 flow [2024-01-27 15:13:23,559 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=182, PETRI_DIFFERENCE_MINUEND_FLOW=300, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=336, PETRI_PLACES=143, PETRI_TRANSITIONS=142} [2024-01-27 15:13:23,561 INFO L281 CegarLoopForPetriNet]: 133 programPoint places, 10 predicate places. [2024-01-27 15:13:23,562 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 142 transitions, 336 flow [2024-01-27 15:13:23,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 54.714285714285715) internal successors, (383), 7 states have internal predecessors, (383), 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 15:13:23,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:13:23,562 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1] [2024-01-27 15:13:23,575 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-01-27 15:13:23,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:13:23,776 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2024-01-27 15:13:23,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:13:23,777 INFO L85 PathProgramCache]: Analyzing trace with hash -811656920, now seen corresponding path program 2 times [2024-01-27 15:13:23,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:13:23,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904456504] [2024-01-27 15:13:23,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:13:23,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:13:23,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:13:23,867 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-01-27 15:13:23,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:13:23,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904456504] [2024-01-27 15:13:23,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904456504] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:13:23,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967637362] [2024-01-27 15:13:23,869 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:13:23,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:13:23,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:13:23,885 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:13:23,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-01-27 15:13:24,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:13:24,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:13:24,013 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-27 15:13:24,014 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:13:24,037 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-01-27 15:13:24,037 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:13:24,079 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-01-27 15:13:24,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967637362] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:13:24,080 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:13:24,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-01-27 15:13:24,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681703264] [2024-01-27 15:13:24,080 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:13:24,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-01-27 15:13:24,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:13:24,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-01-27 15:13:24,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-01-27 15:13:24,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 182 [2024-01-27 15:13:24,083 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 142 transitions, 336 flow. Second operand has 13 states, 13 states have (on average 54.38461538461539) internal successors, (707), 13 states have internal predecessors, (707), 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 15:13:24,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:13:24,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 182 [2024-01-27 15:13:24,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:13:28,191 INFO L124 PetriNetUnfolderBase]: 31325/60566 cut-off events. [2024-01-27 15:13:28,192 INFO L125 PetriNetUnfolderBase]: For 123/123 co-relation queries the response was YES. [2024-01-27 15:13:28,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105704 conditions, 60566 events. 31325/60566 cut-off events. For 123/123 co-relation queries the response was YES. Maximal size of possible extension queue 1763. Compared 609040 event pairs, 27108 based on Foata normal form. 6/53470 useless extension candidates. Maximal degree in co-relation 105645. Up to 44991 conditions per place. [2024-01-27 15:13:28,512 INFO L140 encePairwiseOnDemand]: 179/182 looper letters, 84 selfloop transitions, 11 changer transitions 0/148 dead transitions. [2024-01-27 15:13:28,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 148 transitions, 562 flow [2024-01-27 15:13:28,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-01-27 15:13:28,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-01-27 15:13:28,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 737 transitions. [2024-01-27 15:13:28,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3374542124542125 [2024-01-27 15:13:28,520 INFO L175 Difference]: Start difference. First operand has 143 places, 142 transitions, 336 flow. Second operand 12 states and 737 transitions. [2024-01-27 15:13:28,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 148 transitions, 562 flow [2024-01-27 15:13:28,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 148 transitions, 548 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-01-27 15:13:28,529 INFO L231 Difference]: Finished difference. Result has 159 places, 148 transitions, 406 flow [2024-01-27 15:13:28,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=182, PETRI_DIFFERENCE_MINUEND_FLOW=322, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=406, PETRI_PLACES=159, PETRI_TRANSITIONS=148} [2024-01-27 15:13:28,531 INFO L281 CegarLoopForPetriNet]: 133 programPoint places, 26 predicate places. [2024-01-27 15:13:28,531 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 148 transitions, 406 flow [2024-01-27 15:13:28,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 54.38461538461539) internal successors, (707), 13 states have internal predecessors, (707), 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 15:13:28,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:13:28,532 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 3, 2, 1, 1, 1, 1, 1] [2024-01-27 15:13:28,548 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-01-27 15:13:28,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:13:28,735 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2024-01-27 15:13:28,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:13:28,736 INFO L85 PathProgramCache]: Analyzing trace with hash 59794024, now seen corresponding path program 3 times [2024-01-27 15:13:28,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:13:28,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045536178] [2024-01-27 15:13:28,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:13:28,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:13:28,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-27 15:13:28,758 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-01-27 15:13:28,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-27 15:13:28,782 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-01-27 15:13:28,782 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-01-27 15:13:28,783 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2024-01-27 15:13:28,783 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2024-01-27 15:13:28,783 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2024-01-27 15:13:28,783 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2024-01-27 15:13:28,783 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2024-01-27 15:13:28,783 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2024-01-27 15:13:28,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-01-27 15:13:28,784 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2024-01-27 15:13:28,784 WARN L234 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-01-27 15:13:28,784 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-01-27 15:13:28,818 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-01-27 15:13:28,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 166 places, 227 transitions, 481 flow [2024-01-27 15:13:28,847 INFO L124 PetriNetUnfolderBase]: 148/510 cut-off events. [2024-01-27 15:13:28,848 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-01-27 15:13:28,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 535 conditions, 510 events. 148/510 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 2945 event pairs, 1 based on Foata normal form. 0/347 useless extension candidates. Maximal degree in co-relation 370. Up to 16 conditions per place. [2024-01-27 15:13:28,851 INFO L82 GeneralOperation]: Start removeDead. Operand has 166 places, 227 transitions, 481 flow [2024-01-27 15:13:28,854 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 166 places, 227 transitions, 481 flow [2024-01-27 15:13:28,854 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-27 15:13:28,855 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;@36ed756d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-27 15:13:28,855 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-01-27 15:13:28,862 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-27 15:13:28,862 INFO L124 PetriNetUnfolderBase]: 25/139 cut-off events. [2024-01-27 15:13:28,862 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-01-27 15:13:28,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:13:28,862 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:13:28,862 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-01-27 15:13:28,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:13:28,863 INFO L85 PathProgramCache]: Analyzing trace with hash -663638794, now seen corresponding path program 1 times [2024-01-27 15:13:28,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:13:28,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262492587] [2024-01-27 15:13:28,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:13:28,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:13:28,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:13:28,887 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 15:13:28,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:13:28,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262492587] [2024-01-27 15:13:28,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262492587] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:13:28,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:13:28,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-27 15:13:28,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039621314] [2024-01-27 15:13:28,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:13:28,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-27 15:13:28,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:13:28,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-27 15:13:28,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-27 15:13:28,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 227 [2024-01-27 15:13:28,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 227 transitions, 481 flow. Second operand has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 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 15:13:28,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:13:28,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 227 [2024-01-27 15:13:28,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand