./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_74-tricky_address1_racefree.i --full-output --traceabstraction.positions.where.we.compute.the.hoare.annotation All --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 273a578a 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_74-tricky_address1_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 9a7db49c8892594e32a30fa9165fc3ad1a94911917cd8b63757bb8f24f04b536 --traceabstraction.positions.where.we.compute.the.hoare.annotation All --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.owicki-witnesses-273a578-m [2024-02-19 14:18:32,517 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-02-19 14:18:32,599 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-02-19 14:18:32,604 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-02-19 14:18:32,605 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-02-19 14:18:32,630 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-02-19 14:18:32,630 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-02-19 14:18:32,631 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-02-19 14:18:32,631 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-02-19 14:18:32,634 INFO L153 SettingsManager]: * Use memory slicer=true [2024-02-19 14:18:32,635 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-02-19 14:18:32,635 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-02-19 14:18:32,635 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-02-19 14:18:32,636 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-02-19 14:18:32,637 INFO L153 SettingsManager]: * Use SBE=true [2024-02-19 14:18:32,637 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-02-19 14:18:32,637 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-02-19 14:18:32,637 INFO L153 SettingsManager]: * sizeof long=4 [2024-02-19 14:18:32,638 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-02-19 14:18:32,638 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-02-19 14:18:32,638 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-02-19 14:18:32,639 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-02-19 14:18:32,639 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-02-19 14:18:32,639 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-02-19 14:18:32,640 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-02-19 14:18:32,640 INFO L153 SettingsManager]: * sizeof long double=12 [2024-02-19 14:18:32,640 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-02-19 14:18:32,640 INFO L153 SettingsManager]: * Use constant arrays=true [2024-02-19 14:18:32,641 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-02-19 14:18:32,641 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-02-19 14:18:32,642 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-02-19 14:18:32,642 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-02-19 14:18:32,642 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-19 14:18:32,643 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-02-19 14:18:32,643 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-02-19 14:18:32,643 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-02-19 14:18:32,644 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-02-19 14:18:32,644 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-02-19 14:18:32,644 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-02-19 14:18:32,644 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-02-19 14:18:32,644 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-02-19 14:18:32,645 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-02-19 14:18:32,645 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-02-19 14:18:32,645 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9a7db49c8892594e32a30fa9165fc3ad1a94911917cd8b63757bb8f24f04b536 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All [2024-02-19 14:18:32,908 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-02-19 14:18:32,922 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-02-19 14:18:32,931 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-02-19 14:18:32,932 INFO L270 PluginConnector]: Initializing CDTParser... [2024-02-19 14:18:32,932 INFO L274 PluginConnector]: CDTParser initialized [2024-02-19 14:18:32,933 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_74-tricky_address1_racefree.i [2024-02-19 14:18:34,042 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-02-19 14:18:34,255 INFO L384 CDTParser]: Found 1 translation units. [2024-02-19 14:18:34,256 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_74-tricky_address1_racefree.i [2024-02-19 14:18:34,266 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/acd4c1460/b170c31602fe4ff49bce93c2d6b504de/FLAGf9d34b76e [2024-02-19 14:18:34,276 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/acd4c1460/b170c31602fe4ff49bce93c2d6b504de [2024-02-19 14:18:34,278 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-02-19 14:18:34,278 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-02-19 14:18:34,279 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-02-19 14:18:34,279 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-02-19 14:18:34,290 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-02-19 14:18:34,290 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.02 02:18:34" (1/1) ... [2024-02-19 14:18:34,291 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a62fd69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:18:34, skipping insertion in model container [2024-02-19 14:18:34,291 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.02 02:18:34" (1/1) ... [2024-02-19 14:18:34,326 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-02-19 14:18:34,689 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_74-tricky_address1_racefree.i[41323,41336] [2024-02-19 14:18:34,739 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-02-19 14:18:34,759 INFO L202 MainTranslator]: Completed pre-run [2024-02-19 14:18:34,789 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_74-tricky_address1_racefree.i[41323,41336] [2024-02-19 14:18:34,811 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-02-19 14:18:34,868 INFO L206 MainTranslator]: Completed translation [2024-02-19 14:18:34,869 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:18:34 WrapperNode [2024-02-19 14:18:34,869 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-02-19 14:18:34,870 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-02-19 14:18:34,870 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-02-19 14:18:34,870 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-02-19 14:18:34,874 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:18:34" (1/1) ... [2024-02-19 14:18:34,890 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:18:34" (1/1) ... [2024-02-19 14:18:34,922 INFO L138 Inliner]: procedures = 271, calls = 49, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 213 [2024-02-19 14:18:34,923 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-02-19 14:18:34,923 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-02-19 14:18:34,923 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-02-19 14:18:34,923 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-02-19 14:18:34,932 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:18:34" (1/1) ... [2024-02-19 14:18:34,932 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:18:34" (1/1) ... [2024-02-19 14:18:34,948 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:18:34" (1/1) ... [2024-02-19 14:18:34,961 INFO L175 MemorySlicer]: Split 20 memory accesses to 4 slices as follows [2, 5, 11, 2]. 55 percent of accesses are in the largest equivalence class. The 7 initializations are split as follows [2, 5, 0, 0]. The 6 writes are split as follows [0, 0, 5, 1]. [2024-02-19 14:18:34,968 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:18:34" (1/1) ... [2024-02-19 14:18:34,969 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:18:34" (1/1) ... [2024-02-19 14:18:34,973 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:18:34" (1/1) ... [2024-02-19 14:18:34,981 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:18:34" (1/1) ... [2024-02-19 14:18:34,982 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:18:34" (1/1) ... [2024-02-19 14:18:34,988 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:18:34" (1/1) ... [2024-02-19 14:18:34,990 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-02-19 14:18:34,992 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-02-19 14:18:34,992 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-02-19 14:18:34,993 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-02-19 14:18:34,993 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:18:34" (1/1) ... [2024-02-19 14:18:35,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-19 14:18:35,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:18:35,022 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) [2024-02-19 14:18:35,048 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 [2024-02-19 14:18:35,085 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-02-19 14:18:35,085 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-02-19 14:18:35,085 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-02-19 14:18:35,086 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-02-19 14:18:35,086 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-02-19 14:18:35,086 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-02-19 14:18:35,087 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-02-19 14:18:35,087 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-02-19 14:18:35,087 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-02-19 14:18:35,088 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-02-19 14:18:35,088 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-02-19 14:18:35,088 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-02-19 14:18:35,088 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-02-19 14:18:35,088 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2024-02-19 14:18:35,088 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2024-02-19 14:18:35,088 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-02-19 14:18:35,089 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-02-19 14:18:35,089 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-02-19 14:18:35,089 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-02-19 14:18:35,089 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-02-19 14:18:35,089 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-02-19 14:18:35,091 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-02-19 14:18:35,268 INFO L244 CfgBuilder]: Building ICFG [2024-02-19 14:18:35,270 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-02-19 14:18:35,552 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-02-19 14:18:35,552 INFO L293 CfgBuilder]: Performing block encoding [2024-02-19 14:18:35,651 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-02-19 14:18:35,652 INFO L320 CfgBuilder]: Removed 23 assume(true) statements. [2024-02-19 14:18:35,652 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 02:18:35 BoogieIcfgContainer [2024-02-19 14:18:35,652 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-02-19 14:18:35,653 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-02-19 14:18:35,654 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-02-19 14:18:35,656 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-02-19 14:18:35,656 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.02 02:18:34" (1/3) ... [2024-02-19 14:18:35,657 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@232fdcd5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.02 02:18:35, skipping insertion in model container [2024-02-19 14:18:35,657 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:18:34" (2/3) ... [2024-02-19 14:18:35,657 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@232fdcd5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.02 02:18:35, skipping insertion in model container [2024-02-19 14:18:35,657 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 02:18:35" (3/3) ... [2024-02-19 14:18:35,658 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_74-tricky_address1_racefree.i [2024-02-19 14:18:35,672 INFO L221 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-02-19 14:18:35,673 INFO L180 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-02-19 14:18:35,673 INFO L631 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-02-19 14:18:35,701 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2024-02-19 14:18:35,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 70 places, 93 transitions, 193 flow [2024-02-19 14:18:35,758 INFO L124 PetriNetUnfolderBase]: 38/137 cut-off events. [2024-02-19 14:18:35,758 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-02-19 14:18:35,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 142 conditions, 137 events. 38/137 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 544 event pairs, 0 based on Foata normal form. 0/93 useless extension candidates. Maximal degree in co-relation 86. Up to 8 conditions per place. [2024-02-19 14:18:35,762 INFO L82 GeneralOperation]: Start removeDead. Operand has 70 places, 93 transitions, 193 flow [2024-02-19 14:18:35,765 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 69 places, 91 transitions, 186 flow [2024-02-19 14:18:35,772 INFO L368 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-19 14:18:35,777 INFO L369 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=All, 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;@34f2f4af, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-19 14:18:35,778 INFO L370 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-02-19 14:18:35,782 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-19 14:18:35,783 INFO L124 PetriNetUnfolderBase]: 1/16 cut-off events. [2024-02-19 14:18:35,783 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-19 14:18:35,783 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:18:35,784 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2024-02-19 14:18:35,784 INFO L432 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2024-02-19 14:18:35,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:18:35,788 INFO L85 PathProgramCache]: Analyzing trace with hash 1934464289, now seen corresponding path program 1 times [2024-02-19 14:18:35,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:18:35,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404197281] [2024-02-19 14:18:35,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:18:35,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:18:35,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:18:36,030 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-19 14:18:36,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:18:36,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404197281] [2024-02-19 14:18:36,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404197281] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-19 14:18:36,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-19 14:18:36,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-19 14:18:36,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271036558] [2024-02-19 14:18:36,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-19 14:18:36,095 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-19 14:18:36,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:18:36,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-19 14:18:36,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-19 14:18:36,120 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 93 [2024-02-19 14:18:36,122 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 91 transitions, 186 flow. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 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) [2024-02-19 14:18:36,122 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:18:36,122 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 93 [2024-02-19 14:18:36,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:18:36,336 INFO L124 PetriNetUnfolderBase]: 399/1134 cut-off events. [2024-02-19 14:18:36,336 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-19 14:18:36,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1928 conditions, 1134 events. 399/1134 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 7232 event pairs, 357 based on Foata normal form. 278/1290 useless extension candidates. Maximal degree in co-relation 1859. Up to 789 conditions per place. [2024-02-19 14:18:36,346 INFO L140 encePairwiseOnDemand]: 68/93 looper letters, 41 selfloop transitions, 2 changer transitions 0/70 dead transitions. [2024-02-19 14:18:36,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 70 transitions, 230 flow [2024-02-19 14:18:36,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-19 14:18:36,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-19 14:18:36,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 147 transitions. [2024-02-19 14:18:36,357 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5268817204301075 [2024-02-19 14:18:36,360 INFO L308 CegarLoopForPetriNet]: 69 programPoint places, 2 predicate places. [2024-02-19 14:18:36,361 INFO L507 AbstractCegarLoop]: Abstraction has has 71 places, 70 transitions, 230 flow [2024-02-19 14:18:36,361 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 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) [2024-02-19 14:18:36,361 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:18:36,361 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2024-02-19 14:18:36,361 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-02-19 14:18:36,362 INFO L432 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2024-02-19 14:18:36,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:18:36,362 INFO L85 PathProgramCache]: Analyzing trace with hash -1509947759, now seen corresponding path program 1 times [2024-02-19 14:18:36,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:18:36,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630920835] [2024-02-19 14:18:36,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:18:36,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:18:36,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:18:36,479 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-19 14:18:36,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:18:36,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630920835] [2024-02-19 14:18:36,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630920835] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:18:36,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082577223] [2024-02-19 14:18:36,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:18:36,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:18:36,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:18:36,497 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) [2024-02-19 14:18:36,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-02-19 14:18:36,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:18:36,588 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 3 conjunts are in the unsatisfiable core [2024-02-19 14:18:36,592 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:18:36,622 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-19 14:18:36,623 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:18:36,638 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-19 14:18:36,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082577223] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:18:36,639 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:18:36,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-02-19 14:18:36,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060443249] [2024-02-19 14:18:36,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:18:36,641 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-19 14:18:36,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:18:36,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-19 14:18:36,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-02-19 14:18:36,642 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 93 [2024-02-19 14:18:36,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 70 transitions, 230 flow. Second operand has 7 states, 7 states have (on average 28.571428571428573) internal successors, (200), 7 states have internal predecessors, (200), 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) [2024-02-19 14:18:36,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:18:36,643 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 93 [2024-02-19 14:18:36,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:18:36,812 INFO L124 PetriNetUnfolderBase]: 399/1139 cut-off events. [2024-02-19 14:18:36,813 INFO L125 PetriNetUnfolderBase]: For 129/183 co-relation queries the response was YES. [2024-02-19 14:18:36,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2729 conditions, 1139 events. 399/1139 cut-off events. For 129/183 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 7221 event pairs, 357 based on Foata normal form. 0/1018 useless extension candidates. Maximal degree in co-relation 2624. Up to 792 conditions per place. [2024-02-19 14:18:36,819 INFO L140 encePairwiseOnDemand]: 90/93 looper letters, 41 selfloop transitions, 5 changer transitions 0/73 dead transitions. [2024-02-19 14:18:36,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 73 transitions, 334 flow [2024-02-19 14:18:36,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-02-19 14:18:36,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-02-19 14:18:36,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 211 transitions. [2024-02-19 14:18:36,821 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3781362007168459 [2024-02-19 14:18:36,822 INFO L308 CegarLoopForPetriNet]: 69 programPoint places, 7 predicate places. [2024-02-19 14:18:36,822 INFO L507 AbstractCegarLoop]: Abstraction has has 76 places, 73 transitions, 334 flow [2024-02-19 14:18:36,822 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 28.571428571428573) internal successors, (200), 7 states have internal predecessors, (200), 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) [2024-02-19 14:18:36,822 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:18:36,822 INFO L234 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2024-02-19 14:18:36,837 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-02-19 14:18:37,035 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:18:37,035 INFO L432 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2024-02-19 14:18:37,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:18:37,036 INFO L85 PathProgramCache]: Analyzing trace with hash -988384991, now seen corresponding path program 2 times [2024-02-19 14:18:37,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:18:37,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744808961] [2024-02-19 14:18:37,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:18:37,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:18:37,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:18:37,151 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-19 14:18:37,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:18:37,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744808961] [2024-02-19 14:18:37,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744808961] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:18:37,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847857027] [2024-02-19 14:18:37,152 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-19 14:18:37,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:18:37,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:18:37,169 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) [2024-02-19 14:18:37,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-02-19 14:18:37,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-19 14:18:37,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:18:37,256 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 6 conjunts are in the unsatisfiable core [2024-02-19 14:18:37,257 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:18:37,274 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-19 14:18:37,275 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:18:37,333 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-19 14:18:37,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847857027] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:18:37,334 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:18:37,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-02-19 14:18:37,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534993652] [2024-02-19 14:18:37,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:18:37,335 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-02-19 14:18:37,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:18:37,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-02-19 14:18:37,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-02-19 14:18:37,339 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 93 [2024-02-19 14:18:37,340 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 73 transitions, 334 flow. Second operand has 13 states, 13 states have (on average 28.307692307692307) internal successors, (368), 13 states have internal predecessors, (368), 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) [2024-02-19 14:18:37,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:18:37,340 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 93 [2024-02-19 14:18:37,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:18:37,576 INFO L124 PetriNetUnfolderBase]: 399/1143 cut-off events. [2024-02-19 14:18:37,577 INFO L125 PetriNetUnfolderBase]: For 387/499 co-relation queries the response was YES. [2024-02-19 14:18:37,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3544 conditions, 1143 events. 399/1143 cut-off events. For 387/499 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 7217 event pairs, 357 based on Foata normal form. 0/1021 useless extension candidates. Maximal degree in co-relation 3387. Up to 798 conditions per place. [2024-02-19 14:18:37,582 INFO L140 encePairwiseOnDemand]: 90/93 looper letters, 41 selfloop transitions, 11 changer transitions 0/79 dead transitions. [2024-02-19 14:18:37,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 79 transitions, 474 flow [2024-02-19 14:18:37,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-02-19 14:18:37,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-02-19 14:18:37,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 382 transitions. [2024-02-19 14:18:37,586 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.34229390681003585 [2024-02-19 14:18:37,587 INFO L308 CegarLoopForPetriNet]: 69 programPoint places, 18 predicate places. [2024-02-19 14:18:37,588 INFO L507 AbstractCegarLoop]: Abstraction has has 87 places, 79 transitions, 474 flow [2024-02-19 14:18:37,588 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 28.307692307692307) internal successors, (368), 13 states have internal predecessors, (368), 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) [2024-02-19 14:18:37,588 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:18:37,589 INFO L234 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1] [2024-02-19 14:18:37,617 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-02-19 14:18:37,801 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2024-02-19 14:18:37,801 INFO L432 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2024-02-19 14:18:37,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:18:37,802 INFO L85 PathProgramCache]: Analyzing trace with hash -2091812063, now seen corresponding path program 3 times [2024-02-19 14:18:37,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:18:37,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681873629] [2024-02-19 14:18:37,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:18:37,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:18:37,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-19 14:18:37,827 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-02-19 14:18:37,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-19 14:18:37,867 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-02-19 14:18:37,867 INFO L372 BasicCegarLoop]: Counterexample is feasible [2024-02-19 14:18:37,868 INFO L818 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2024-02-19 14:18:37,869 INFO L818 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2024-02-19 14:18:37,870 INFO L818 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2024-02-19 14:18:37,870 INFO L818 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2024-02-19 14:18:37,870 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-02-19 14:18:37,871 INFO L457 BasicCegarLoop]: Path program histogram: [3, 1] [2024-02-19 14:18:37,872 WARN L345 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-02-19 14:18:37,872 INFO L631 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-02-19 14:18:37,892 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-02-19 14:18:37,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 102 places, 136 transitions, 288 flow [2024-02-19 14:18:37,907 INFO L124 PetriNetUnfolderBase]: 64/231 cut-off events. [2024-02-19 14:18:37,907 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-02-19 14:18:37,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 243 conditions, 231 events. 64/231 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1084 event pairs, 0 based on Foata normal form. 0/158 useless extension candidates. Maximal degree in co-relation 139. Up to 12 conditions per place. [2024-02-19 14:18:37,908 INFO L82 GeneralOperation]: Start removeDead. Operand has 102 places, 136 transitions, 288 flow [2024-02-19 14:18:37,910 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 102 places, 136 transitions, 288 flow [2024-02-19 14:18:37,911 INFO L368 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-19 14:18:37,911 INFO L369 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=All, 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;@34f2f4af, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-19 14:18:37,912 INFO L370 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-02-19 14:18:37,915 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-19 14:18:37,915 INFO L124 PetriNetUnfolderBase]: 7/54 cut-off events. [2024-02-19 14:18:37,915 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-02-19 14:18:37,916 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:18:37,916 INFO L234 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1] [2024-02-19 14:18:37,916 INFO L432 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-02-19 14:18:37,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:18:37,916 INFO L85 PathProgramCache]: Analyzing trace with hash 796306266, now seen corresponding path program 1 times [2024-02-19 14:18:37,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:18:37,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501926118] [2024-02-19 14:18:37,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:18:37,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:18:37,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:18:37,943 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-02-19 14:18:37,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:18:37,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501926118] [2024-02-19 14:18:37,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501926118] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-19 14:18:37,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-19 14:18:37,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-19 14:18:37,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574194410] [2024-02-19 14:18:37,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-19 14:18:37,944 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-19 14:18:37,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:18:37,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-19 14:18:37,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-19 14:18:37,945 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 136 [2024-02-19 14:18:37,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 136 transitions, 288 flow. Second operand has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 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) [2024-02-19 14:18:37,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:18:37,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 136 [2024-02-19 14:18:37,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:18:40,175 INFO L124 PetriNetUnfolderBase]: 14783/28870 cut-off events. [2024-02-19 14:18:40,176 INFO L125 PetriNetUnfolderBase]: For 98/98 co-relation queries the response was YES. [2024-02-19 14:18:40,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50828 conditions, 28870 events. 14783/28870 cut-off events. For 98/98 co-relation queries the response was YES. Maximal size of possible extension queue 883. Compared 265911 event pairs, 13600 based on Foata normal form. 7914/33823 useless extension candidates. Maximal degree in co-relation 40721. Up to 21860 conditions per place. [2024-02-19 14:18:40,316 INFO L140 encePairwiseOnDemand]: 100/136 looper letters, 62 selfloop transitions, 2 changer transitions 0/104 dead transitions. [2024-02-19 14:18:40,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 104 transitions, 352 flow [2024-02-19 14:18:40,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-19 14:18:40,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-19 14:18:40,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 218 transitions. [2024-02-19 14:18:40,318 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5343137254901961 [2024-02-19 14:18:40,318 INFO L308 CegarLoopForPetriNet]: 102 programPoint places, 2 predicate places. [2024-02-19 14:18:40,319 INFO L507 AbstractCegarLoop]: Abstraction has has 104 places, 104 transitions, 352 flow [2024-02-19 14:18:40,319 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 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) [2024-02-19 14:18:40,319 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:18:40,319 INFO L234 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1] [2024-02-19 14:18:40,319 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-02-19 14:18:40,320 INFO L432 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-02-19 14:18:40,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:18:40,320 INFO L85 PathProgramCache]: Analyzing trace with hash -191595918, now seen corresponding path program 1 times [2024-02-19 14:18:40,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:18:40,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467988984] [2024-02-19 14:18:40,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:18:40,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:18:40,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:18:40,364 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-02-19 14:18:40,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:18:40,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467988984] [2024-02-19 14:18:40,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467988984] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:18:40,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747644817] [2024-02-19 14:18:40,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:18:40,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:18:40,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:18:40,385 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) [2024-02-19 14:18:40,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-02-19 14:18:40,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:18:40,463 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 3 conjunts are in the unsatisfiable core [2024-02-19 14:18:40,463 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:18:40,470 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-02-19 14:18:40,470 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:18:40,480 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-02-19 14:18:40,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747644817] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:18:40,481 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:18:40,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-02-19 14:18:40,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517424827] [2024-02-19 14:18:40,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:18:40,482 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-19 14:18:40,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:18:40,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-19 14:18:40,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-02-19 14:18:40,483 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 136 [2024-02-19 14:18:40,483 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 104 transitions, 352 flow. Second operand has 7 states, 7 states have (on average 41.714285714285715) internal successors, (292), 7 states have internal predecessors, (292), 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) [2024-02-19 14:18:40,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:18:40,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 136 [2024-02-19 14:18:40,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:18:42,614 INFO L124 PetriNetUnfolderBase]: 14783/28873 cut-off events. [2024-02-19 14:18:42,614 INFO L125 PetriNetUnfolderBase]: For 2855/5501 co-relation queries the response was YES. [2024-02-19 14:18:42,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72698 conditions, 28873 events. 14783/28873 cut-off events. For 2855/5501 co-relation queries the response was YES. Maximal size of possible extension queue 882. Compared 266035 event pairs, 13600 based on Foata normal form. 0/25912 useless extension candidates. Maximal degree in co-relation 58231. Up to 21863 conditions per place. [2024-02-19 14:18:42,740 INFO L140 encePairwiseOnDemand]: 133/136 looper letters, 62 selfloop transitions, 5 changer transitions 0/107 dead transitions. [2024-02-19 14:18:42,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 107 transitions, 498 flow [2024-02-19 14:18:42,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-02-19 14:18:42,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-02-19 14:18:42,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 310 transitions. [2024-02-19 14:18:42,746 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3799019607843137 [2024-02-19 14:18:42,749 INFO L308 CegarLoopForPetriNet]: 102 programPoint places, 7 predicate places. [2024-02-19 14:18:42,749 INFO L507 AbstractCegarLoop]: Abstraction has has 109 places, 107 transitions, 498 flow [2024-02-19 14:18:42,750 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 41.714285714285715) internal successors, (292), 7 states have internal predecessors, (292), 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) [2024-02-19 14:18:42,750 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:18:42,750 INFO L234 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1] [2024-02-19 14:18:42,779 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-02-19 14:18:42,961 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:18:42,961 INFO L432 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-02-19 14:18:42,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:18:42,962 INFO L85 PathProgramCache]: Analyzing trace with hash 1878896986, now seen corresponding path program 2 times [2024-02-19 14:18:42,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:18:42,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355700672] [2024-02-19 14:18:42,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:18:42,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:18:42,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:18:43,071 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-02-19 14:18:43,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:18:43,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355700672] [2024-02-19 14:18:43,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355700672] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:18:43,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049486755] [2024-02-19 14:18:43,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-19 14:18:43,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:18:43,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:18:43,093 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) [2024-02-19 14:18:43,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-02-19 14:18:43,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-19 14:18:43,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:18:43,188 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 6 conjunts are in the unsatisfiable core [2024-02-19 14:18:43,189 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:18:43,199 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-02-19 14:18:43,199 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:18:43,237 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-02-19 14:18:43,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049486755] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:18:43,237 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:18:43,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-02-19 14:18:43,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801968885] [2024-02-19 14:18:43,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:18:43,238 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-02-19 14:18:43,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:18:43,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-02-19 14:18:43,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-02-19 14:18:43,240 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 136 [2024-02-19 14:18:43,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 107 transitions, 498 flow. Second operand has 13 states, 13 states have (on average 41.38461538461539) internal successors, (538), 13 states have internal predecessors, (538), 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) [2024-02-19 14:18:43,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:18:43,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 136 [2024-02-19 14:18:43,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:18:45,411 INFO L124 PetriNetUnfolderBase]: 14783/28879 cut-off events. [2024-02-19 14:18:45,412 INFO L125 PetriNetUnfolderBase]: For 8369/13661 co-relation queries the response was YES. [2024-02-19 14:18:45,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94586 conditions, 28879 events. 14783/28879 cut-off events. For 8369/13661 co-relation queries the response was YES. Maximal size of possible extension queue 882. Compared 266141 event pairs, 13600 based on Foata normal form. 0/25918 useless extension candidates. Maximal degree in co-relation 75741. Up to 21869 conditions per place. [2024-02-19 14:18:45,560 INFO L140 encePairwiseOnDemand]: 133/136 looper letters, 62 selfloop transitions, 11 changer transitions 0/113 dead transitions. [2024-02-19 14:18:45,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 113 transitions, 680 flow [2024-02-19 14:18:45,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-02-19 14:18:45,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-02-19 14:18:45,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 559 transitions. [2024-02-19 14:18:45,562 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3425245098039216 [2024-02-19 14:18:45,563 INFO L308 CegarLoopForPetriNet]: 102 programPoint places, 18 predicate places. [2024-02-19 14:18:45,563 INFO L507 AbstractCegarLoop]: Abstraction has has 120 places, 113 transitions, 680 flow [2024-02-19 14:18:45,563 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 41.38461538461539) internal successors, (538), 13 states have internal predecessors, (538), 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) [2024-02-19 14:18:45,563 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:18:45,563 INFO L234 CegarLoopForPetriNet]: trace histogram [10, 3, 2, 1, 1, 1, 1, 1] [2024-02-19 14:18:45,592 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-02-19 14:18:45,775 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:18:45,776 INFO L432 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-02-19 14:18:45,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:18:45,776 INFO L85 PathProgramCache]: Analyzing trace with hash -222782886, now seen corresponding path program 3 times [2024-02-19 14:18:45,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:18:45,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536295450] [2024-02-19 14:18:45,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:18:45,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:18:45,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-19 14:18:45,803 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-02-19 14:18:45,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-19 14:18:45,833 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-02-19 14:18:45,834 INFO L372 BasicCegarLoop]: Counterexample is feasible [2024-02-19 14:18:45,835 INFO L818 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2024-02-19 14:18:45,836 INFO L818 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2024-02-19 14:18:45,836 INFO L818 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2024-02-19 14:18:45,836 INFO L818 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2024-02-19 14:18:45,837 INFO L818 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2024-02-19 14:18:45,837 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-02-19 14:18:45,837 INFO L457 BasicCegarLoop]: Path program histogram: [3, 1] [2024-02-19 14:18:45,837 WARN L345 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-02-19 14:18:45,838 INFO L631 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-02-19 14:18:45,867 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-02-19 14:18:45,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 134 places, 179 transitions, 385 flow [2024-02-19 14:18:45,888 INFO L124 PetriNetUnfolderBase]: 93/336 cut-off events. [2024-02-19 14:18:45,888 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-02-19 14:18:45,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 361 conditions, 336 events. 93/336 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1697 event pairs, 1 based on Foata normal form. 0/232 useless extension candidates. Maximal degree in co-relation 240. Up to 16 conditions per place. [2024-02-19 14:18:45,890 INFO L82 GeneralOperation]: Start removeDead. Operand has 134 places, 179 transitions, 385 flow [2024-02-19 14:18:45,895 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 134 places, 179 transitions, 385 flow [2024-02-19 14:18:45,896 INFO L368 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-19 14:18:45,900 INFO L369 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=All, 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;@34f2f4af, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-19 14:18:45,900 INFO L370 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-02-19 14:18:45,905 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-19 14:18:45,905 INFO L124 PetriNetUnfolderBase]: 13/84 cut-off events. [2024-02-19 14:18:45,905 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-02-19 14:18:45,905 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:18:45,906 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:18:45,906 INFO L432 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2024-02-19 14:18:45,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:18:45,906 INFO L85 PathProgramCache]: Analyzing trace with hash 687690589, now seen corresponding path program 1 times [2024-02-19 14:18:45,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:18:45,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534378425] [2024-02-19 14:18:45,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:18:45,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:18:45,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:18:45,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:18:45,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:18:45,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534378425] [2024-02-19 14:18:45,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534378425] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-19 14:18:45,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-19 14:18:45,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-19 14:18:45,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223137722] [2024-02-19 14:18:45,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-19 14:18:45,933 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-19 14:18:45,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:18:45,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-19 14:18:45,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-19 14:18:45,935 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 179 [2024-02-19 14:18:45,935 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 179 transitions, 385 flow. Second operand has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 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) [2024-02-19 14:18:45,935 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:18:45,935 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 179 [2024-02-19 14:18:45,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand