./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-ext/11_fmaxsymopt-zero.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/pthread-ext/11_fmaxsymopt-zero.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 33726888f4084a4eef0b3c291c9d0f3df5c2ad2aa8559b997fd648ce422ca927 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-a340643-m [2024-01-27 15:07:45,853 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-27 15:07:45,918 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-27 15:07:45,922 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-27 15:07:45,923 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-27 15:07:45,948 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-27 15:07:45,949 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-27 15:07:45,949 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-27 15:07:45,950 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-27 15:07:45,953 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-27 15:07:45,954 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-27 15:07:45,954 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-27 15:07:45,955 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-27 15:07:45,956 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-27 15:07:45,956 INFO L153 SettingsManager]: * Use SBE=true [2024-01-27 15:07:45,956 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-27 15:07:45,956 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-27 15:07:45,957 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-27 15:07:45,957 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-27 15:07:45,958 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-27 15:07:45,958 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-27 15:07:45,958 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-27 15:07:45,959 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-27 15:07:45,959 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-27 15:07:45,959 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-27 15:07:45,959 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-27 15:07:45,959 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-27 15:07:45,959 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-27 15:07:45,960 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-27 15:07:45,960 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-27 15:07:45,961 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-27 15:07:45,961 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-27 15:07:45,961 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 15:07:45,961 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-27 15:07:45,962 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-27 15:07:45,962 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-27 15:07:45,962 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-27 15:07:45,962 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-27 15:07:45,962 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-27 15:07:45,962 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-27 15:07:45,962 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-27 15:07:45,963 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-27 15:07:45,963 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-27 15:07:45,963 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 33726888f4084a4eef0b3c291c9d0f3df5c2ad2aa8559b997fd648ce422ca927 [2024-01-27 15:07:46,188 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-27 15:07:46,208 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-27 15:07:46,209 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-27 15:07:46,210 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-27 15:07:46,210 INFO L274 PluginConnector]: CDTParser initialized [2024-01-27 15:07:46,211 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/11_fmaxsymopt-zero.i [2024-01-27 15:07:47,255 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-27 15:07:47,537 INFO L384 CDTParser]: Found 1 translation units. [2024-01-27 15:07:47,537 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/11_fmaxsymopt-zero.i [2024-01-27 15:07:47,546 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fe0635bda/6ef18a27c0e7477895f54874d33d06b5/FLAG398f20363 [2024-01-27 15:07:47,555 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fe0635bda/6ef18a27c0e7477895f54874d33d06b5 [2024-01-27 15:07:47,556 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-27 15:07:47,557 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-01-27 15:07:47,558 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-27 15:07:47,558 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-27 15:07:47,561 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-27 15:07:47,562 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 03:07:47" (1/1) ... [2024-01-27 15:07:47,563 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@621c4194 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:07:47, skipping insertion in model container [2024-01-27 15:07:47,563 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 03:07:47" (1/1) ... [2024-01-27 15:07:47,607 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-01-27 15:07:47,908 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/11_fmaxsymopt-zero.i[30846,30859] [2024-01-27 15:07:47,917 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 15:07:47,927 INFO L202 MainTranslator]: Completed pre-run [2024-01-27 15:07:47,965 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/11_fmaxsymopt-zero.i[30846,30859] [2024-01-27 15:07:47,973 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 15:07:48,003 INFO L206 MainTranslator]: Completed translation [2024-01-27 15:07:48,003 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:07:48 WrapperNode [2024-01-27 15:07:48,003 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-27 15:07:48,004 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-27 15:07:48,005 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-27 15:07:48,005 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-27 15:07:48,010 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:07:48" (1/1) ... [2024-01-27 15:07:48,033 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:07:48" (1/1) ... [2024-01-27 15:07:48,056 INFO L138 Inliner]: procedures = 165, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 80 [2024-01-27 15:07:48,056 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-27 15:07:48,057 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-27 15:07:48,057 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-27 15:07:48,057 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-27 15:07:48,065 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:07:48" (1/1) ... [2024-01-27 15:07:48,065 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:07:48" (1/1) ... [2024-01-27 15:07:48,070 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:07:48" (1/1) ... [2024-01-27 15:07:48,083 INFO L175 MemorySlicer]: Split 15 memory accesses to 4 slices as follows [2, 5, 7, 1]. 47 percent of accesses are in the largest equivalence class. The 13 initializations are split as follows [2, 5, 6, 0]. The 1 writes are split as follows [0, 0, 0, 1]. [2024-01-27 15:07:48,084 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:07:48" (1/1) ... [2024-01-27 15:07:48,084 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:07:48" (1/1) ... [2024-01-27 15:07:48,091 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:07:48" (1/1) ... [2024-01-27 15:07:48,094 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:07:48" (1/1) ... [2024-01-27 15:07:48,097 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:07:48" (1/1) ... [2024-01-27 15:07:48,098 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:07:48" (1/1) ... [2024-01-27 15:07:48,100 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-27 15:07:48,101 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-27 15:07:48,101 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-27 15:07:48,101 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-27 15:07:48,102 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:07:48" (1/1) ... [2024-01-27 15:07:48,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 15:07:48,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:07:48,142 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 15:07:48,168 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 15:07:48,207 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-01-27 15:07:48,208 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-01-27 15:07:48,208 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-01-27 15:07:48,208 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-01-27 15:07:48,208 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2024-01-27 15:07:48,208 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2024-01-27 15:07:48,210 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-27 15:07:48,210 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-27 15:07:48,210 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-27 15:07:48,210 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-01-27 15:07:48,211 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-01-27 15:07:48,211 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-27 15:07:48,211 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-27 15:07:48,211 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-27 15:07:48,211 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-27 15:07:48,211 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-27 15:07:48,211 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-27 15:07:48,212 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-01-27 15:07:48,212 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-01-27 15:07:48,213 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-27 15:07:48,213 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-27 15:07:48,214 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 15:07:48,310 INFO L244 CfgBuilder]: Building ICFG [2024-01-27 15:07:48,312 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-27 15:07:48,431 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-27 15:07:48,431 INFO L293 CfgBuilder]: Performing block encoding [2024-01-27 15:07:48,549 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-27 15:07:48,549 INFO L320 CfgBuilder]: Removed 2 assume(true) statements. [2024-01-27 15:07:48,550 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 03:07:48 BoogieIcfgContainer [2024-01-27 15:07:48,550 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-27 15:07:48,571 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-27 15:07:48,571 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-27 15:07:48,574 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-27 15:07:48,574 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 03:07:47" (1/3) ... [2024-01-27 15:07:48,575 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@435f9581 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 03:07:48, skipping insertion in model container [2024-01-27 15:07:48,575 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:07:48" (2/3) ... [2024-01-27 15:07:48,575 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@435f9581 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 03:07:48, skipping insertion in model container [2024-01-27 15:07:48,575 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 03:07:48" (3/3) ... [2024-01-27 15:07:48,576 INFO L112 eAbstractionObserver]: Analyzing ICFG 11_fmaxsymopt-zero.i [2024-01-27 15:07:48,582 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2024-01-27 15:07:48,590 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-27 15:07:48,604 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-01-27 15:07:48,604 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-27 15:07:48,630 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-01-27 15:07:48,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 20 places, 20 transitions, 44 flow [2024-01-27 15:07:48,670 INFO L124 PetriNetUnfolderBase]: 3/22 cut-off events. [2024-01-27 15:07:48,671 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-27 15:07:48,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26 conditions, 22 events. 3/22 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 30 event pairs, 0 based on Foata normal form. 0/16 useless extension candidates. Maximal degree in co-relation 17. Up to 2 conditions per place. [2024-01-27 15:07:48,673 INFO L82 GeneralOperation]: Start removeDead. Operand has 20 places, 20 transitions, 44 flow [2024-01-27 15:07:48,675 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 20 places, 20 transitions, 44 flow [2024-01-27 15:07:48,681 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-27 15:07:48,686 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;@18a480e3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-27 15:07:48,686 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-01-27 15:07:48,695 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-27 15:07:48,696 INFO L124 PetriNetUnfolderBase]: 1/13 cut-off events. [2024-01-27 15:07:48,696 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-27 15:07:48,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:07:48,697 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-01-27 15:07:48,697 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-01-27 15:07:48,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:07:48,704 INFO L85 PathProgramCache]: Analyzing trace with hash -1090929727, now seen corresponding path program 1 times [2024-01-27 15:07:48,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:07:48,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503093471] [2024-01-27 15:07:48,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:07:48,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:07:48,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-27 15:07:48,840 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-01-27 15:07:48,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-27 15:07:48,897 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-01-27 15:07:48,899 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-01-27 15:07:48,900 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2024-01-27 15:07:48,902 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2024-01-27 15:07:48,902 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2024-01-27 15:07:48,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-27 15:07:48,903 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2024-01-27 15:07:48,906 WARN L234 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-01-27 15:07:48,906 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-01-27 15:07:48,926 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-01-27 15:07:48,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 34 places, 35 transitions, 80 flow [2024-01-27 15:07:48,942 INFO L124 PetriNetUnfolderBase]: 6/40 cut-off events. [2024-01-27 15:07:48,942 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-27 15:07:48,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 40 events. 6/40 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 88 event pairs, 0 based on Foata normal form. 0/29 useless extension candidates. Maximal degree in co-relation 31. Up to 3 conditions per place. [2024-01-27 15:07:48,944 INFO L82 GeneralOperation]: Start removeDead. Operand has 34 places, 35 transitions, 80 flow [2024-01-27 15:07:48,945 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 34 places, 35 transitions, 80 flow [2024-01-27 15:07:48,948 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-27 15:07:48,950 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;@18a480e3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-27 15:07:48,950 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-01-27 15:07:48,962 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-27 15:07:48,962 INFO L124 PetriNetUnfolderBase]: 1/17 cut-off events. [2024-01-27 15:07:48,962 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-01-27 15:07:48,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:07:48,962 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:07:48,963 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2024-01-27 15:07:48,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:07:48,963 INFO L85 PathProgramCache]: Analyzing trace with hash -1707361577, now seen corresponding path program 1 times [2024-01-27 15:07:48,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:07:48,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294155723] [2024-01-27 15:07:48,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:07:48,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:07:49,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:07:49,130 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 15:07:49,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:07:49,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294155723] [2024-01-27 15:07:49,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294155723] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:07:49,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:07:49,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-27 15:07:49,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204821607] [2024-01-27 15:07:49,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:07:49,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-27 15:07:49,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:07:49,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-27 15:07:49,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-27 15:07:49,175 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 35 [2024-01-27 15:07:49,177 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 35 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 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 15:07:49,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:07:49,178 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 35 [2024-01-27 15:07:49,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:07:49,403 INFO L124 PetriNetUnfolderBase]: 602/1210 cut-off events. [2024-01-27 15:07:49,403 INFO L125 PetriNetUnfolderBase]: For 38/38 co-relation queries the response was YES. [2024-01-27 15:07:49,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2195 conditions, 1210 events. 602/1210 cut-off events. For 38/38 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 6744 event pairs, 254 based on Foata normal form. 90/1135 useless extension candidates. Maximal degree in co-relation 1103. Up to 494 conditions per place. [2024-01-27 15:07:49,412 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 36 selfloop transitions, 2 changer transitions 0/48 dead transitions. [2024-01-27 15:07:49,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 48 transitions, 187 flow [2024-01-27 15:07:49,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-27 15:07:49,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-27 15:07:49,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 75 transitions. [2024-01-27 15:07:49,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7142857142857143 [2024-01-27 15:07:49,423 INFO L175 Difference]: Start difference. First operand has 34 places, 35 transitions, 80 flow. Second operand 3 states and 75 transitions. [2024-01-27 15:07:49,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 48 transitions, 187 flow [2024-01-27 15:07:49,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 48 transitions, 187 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-01-27 15:07:49,427 INFO L231 Difference]: Finished difference. Result has 37 places, 33 transitions, 88 flow [2024-01-27 15:07:49,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=37, PETRI_TRANSITIONS=33} [2024-01-27 15:07:49,431 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 3 predicate places. [2024-01-27 15:07:49,431 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 33 transitions, 88 flow [2024-01-27 15:07:49,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 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 15:07:49,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:07:49,432 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1] [2024-01-27 15:07:49,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-01-27 15:07:49,432 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2024-01-27 15:07:49,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:07:49,433 INFO L85 PathProgramCache]: Analyzing trace with hash -558384784, now seen corresponding path program 1 times [2024-01-27 15:07:49,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:07:49,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522812250] [2024-01-27 15:07:49,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:07:49,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:07:49,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-27 15:07:49,446 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-01-27 15:07:49,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-27 15:07:49,457 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-01-27 15:07:49,457 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-01-27 15:07:49,457 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2024-01-27 15:07:49,458 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2024-01-27 15:07:49,458 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2024-01-27 15:07:49,458 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2024-01-27 15:07:49,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-01-27 15:07:49,458 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2024-01-27 15:07:49,459 WARN L234 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-01-27 15:07:49,459 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-01-27 15:07:49,480 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-01-27 15:07:49,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 48 places, 50 transitions, 118 flow [2024-01-27 15:07:49,486 INFO L124 PetriNetUnfolderBase]: 9/58 cut-off events. [2024-01-27 15:07:49,487 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-01-27 15:07:49,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71 conditions, 58 events. 9/58 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 150 event pairs, 0 based on Foata normal form. 0/42 useless extension candidates. Maximal degree in co-relation 47. Up to 4 conditions per place. [2024-01-27 15:07:49,487 INFO L82 GeneralOperation]: Start removeDead. Operand has 48 places, 50 transitions, 118 flow [2024-01-27 15:07:49,488 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 48 places, 50 transitions, 118 flow [2024-01-27 15:07:49,489 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-27 15:07:49,489 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;@18a480e3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-27 15:07:49,490 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-01-27 15:07:49,492 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-27 15:07:49,492 INFO L124 PetriNetUnfolderBase]: 1/17 cut-off events. [2024-01-27 15:07:49,492 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-01-27 15:07:49,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:07:49,492 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:07:49,492 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-01-27 15:07:49,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:07:49,493 INFO L85 PathProgramCache]: Analyzing trace with hash 1210251607, now seen corresponding path program 1 times [2024-01-27 15:07:49,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:07:49,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695662722] [2024-01-27 15:07:49,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:07:49,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:07:49,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:07:49,535 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 15:07:49,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:07:49,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695662722] [2024-01-27 15:07:49,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695662722] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:07:49,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:07:49,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-27 15:07:49,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842854948] [2024-01-27 15:07:49,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:07:49,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-27 15:07:49,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:07:49,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-27 15:07:49,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-27 15:07:49,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 50 [2024-01-27 15:07:49,541 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 50 transitions, 118 flow. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 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 15:07:49,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:07:49,542 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 50 [2024-01-27 15:07:49,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:07:50,423 INFO L124 PetriNetUnfolderBase]: 7680/12585 cut-off events. [2024-01-27 15:07:50,424 INFO L125 PetriNetUnfolderBase]: For 736/736 co-relation queries the response was YES. [2024-01-27 15:07:50,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23435 conditions, 12585 events. 7680/12585 cut-off events. For 736/736 co-relation queries the response was YES. Maximal size of possible extension queue 532. Compared 87116 event pairs, 3366 based on Foata normal form. 1386/12260 useless extension candidates. Maximal degree in co-relation 6901. Up to 5478 conditions per place. [2024-01-27 15:07:50,474 INFO L140 encePairwiseOnDemand]: 43/50 looper letters, 54 selfloop transitions, 2 changer transitions 0/71 dead transitions. [2024-01-27 15:07:50,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 71 transitions, 284 flow [2024-01-27 15:07:50,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-27 15:07:50,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-27 15:07:50,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 110 transitions. [2024-01-27 15:07:50,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7333333333333333 [2024-01-27 15:07:50,476 INFO L175 Difference]: Start difference. First operand has 48 places, 50 transitions, 118 flow. Second operand 3 states and 110 transitions. [2024-01-27 15:07:50,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 71 transitions, 284 flow [2024-01-27 15:07:50,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 71 transitions, 280 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-01-27 15:07:50,479 INFO L231 Difference]: Finished difference. Result has 51 places, 47 transitions, 122 flow [2024-01-27 15:07:50,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=122, PETRI_PLACES=51, PETRI_TRANSITIONS=47} [2024-01-27 15:07:50,480 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 3 predicate places. [2024-01-27 15:07:50,480 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 47 transitions, 122 flow [2024-01-27 15:07:50,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 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 15:07:50,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:07:50,480 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:07:50,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-01-27 15:07:50,481 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-01-27 15:07:50,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:07:50,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1245026664, now seen corresponding path program 1 times [2024-01-27 15:07:50,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:07:50,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387492847] [2024-01-27 15:07:50,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:07:50,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:07:50,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:07:50,519 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 15:07:50,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:07:50,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387492847] [2024-01-27 15:07:50,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387492847] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:07:50,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:07:50,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-27 15:07:50,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011225693] [2024-01-27 15:07:50,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:07:50,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-27 15:07:50,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:07:50,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-27 15:07:50,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-27 15:07:50,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 50 [2024-01-27 15:07:50,524 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 47 transitions, 122 flow. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 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 15:07:50,525 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:07:50,525 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 50 [2024-01-27 15:07:50,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:07:51,799 INFO L124 PetriNetUnfolderBase]: 12770/20785 cut-off events. [2024-01-27 15:07:51,799 INFO L125 PetriNetUnfolderBase]: For 3473/3473 co-relation queries the response was YES. [2024-01-27 15:07:51,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40643 conditions, 20785 events. 12770/20785 cut-off events. For 3473/3473 co-relation queries the response was YES. Maximal size of possible extension queue 826. Compared 151975 event pairs, 5594 based on Foata normal form. 0/18576 useless extension candidates. Maximal degree in co-relation 20002. Up to 9101 conditions per place. [2024-01-27 15:07:51,916 INFO L140 encePairwiseOnDemand]: 47/50 looper letters, 57 selfloop transitions, 2 changer transitions 0/73 dead transitions. [2024-01-27 15:07:51,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 73 transitions, 309 flow [2024-01-27 15:07:51,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-27 15:07:51,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-27 15:07:51,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 101 transitions. [2024-01-27 15:07:51,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6733333333333333 [2024-01-27 15:07:51,918 INFO L175 Difference]: Start difference. First operand has 51 places, 47 transitions, 122 flow. Second operand 3 states and 101 transitions. [2024-01-27 15:07:51,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 73 transitions, 309 flow [2024-01-27 15:07:51,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 73 transitions, 301 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-27 15:07:51,924 INFO L231 Difference]: Finished difference. Result has 53 places, 48 transitions, 132 flow [2024-01-27 15:07:51,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=132, PETRI_PLACES=53, PETRI_TRANSITIONS=48} [2024-01-27 15:07:51,925 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 5 predicate places. [2024-01-27 15:07:51,925 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 48 transitions, 132 flow [2024-01-27 15:07:51,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 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 15:07:51,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:07:51,925 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:07:51,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-01-27 15:07:51,926 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-01-27 15:07:51,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:07:51,926 INFO L85 PathProgramCache]: Analyzing trace with hash -356764205, now seen corresponding path program 1 times [2024-01-27 15:07:51,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:07:51,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758389874] [2024-01-27 15:07:51,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:07:51,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:07:51,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:07:52,031 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 15:07:52,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:07:52,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758389874] [2024-01-27 15:07:52,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758389874] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:07:52,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:07:52,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-27 15:07:52,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614433086] [2024-01-27 15:07:52,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:07:52,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-27 15:07:52,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:07:52,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-27 15:07:52,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-27 15:07:52,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-01-27 15:07:52,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 48 transitions, 132 flow. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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 15:07:52,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:07:52,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-01-27 15:07:52,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:07:52,978 INFO L124 PetriNetUnfolderBase]: 9641/15783 cut-off events. [2024-01-27 15:07:52,979 INFO L125 PetriNetUnfolderBase]: For 3297/3297 co-relation queries the response was YES. [2024-01-27 15:07:53,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31838 conditions, 15783 events. 9641/15783 cut-off events. For 3297/3297 co-relation queries the response was YES. Maximal size of possible extension queue 611. Compared 110768 event pairs, 6423 based on Foata normal form. 354/14811 useless extension candidates. Maximal degree in co-relation 22643. Up to 10356 conditions per place. [2024-01-27 15:07:53,075 INFO L140 encePairwiseOnDemand]: 47/50 looper letters, 54 selfloop transitions, 2 changer transitions 0/70 dead transitions. [2024-01-27 15:07:53,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 70 transitions, 308 flow [2024-01-27 15:07:53,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-27 15:07:53,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-27 15:07:53,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 101 transitions. [2024-01-27 15:07:53,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6733333333333333 [2024-01-27 15:07:53,077 INFO L175 Difference]: Start difference. First operand has 53 places, 48 transitions, 132 flow. Second operand 3 states and 101 transitions. [2024-01-27 15:07:53,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 70 transitions, 308 flow [2024-01-27 15:07:53,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 70 transitions, 300 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-27 15:07:53,103 INFO L231 Difference]: Finished difference. Result has 54 places, 48 transitions, 136 flow [2024-01-27 15:07:53,103 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=136, PETRI_PLACES=54, PETRI_TRANSITIONS=48} [2024-01-27 15:07:53,104 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 6 predicate places. [2024-01-27 15:07:53,104 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 48 transitions, 136 flow [2024-01-27 15:07:53,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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 15:07:53,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:07:53,105 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1] [2024-01-27 15:07:53,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-01-27 15:07:53,105 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-01-27 15:07:53,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:07:53,106 INFO L85 PathProgramCache]: Analyzing trace with hash 1594580000, now seen corresponding path program 1 times [2024-01-27 15:07:53,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:07:53,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894713384] [2024-01-27 15:07:53,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:07:53,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:07:53,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-27 15:07:53,126 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-01-27 15:07:53,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-27 15:07:53,141 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-01-27 15:07:53,142 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-01-27 15:07:53,142 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2024-01-27 15:07:53,142 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2024-01-27 15:07:53,142 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2024-01-27 15:07:53,143 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2024-01-27 15:07:53,143 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2024-01-27 15:07:53,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-01-27 15:07:53,143 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2024-01-27 15:07:53,144 WARN L234 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2024-01-27 15:07:53,144 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2024-01-27 15:07:53,290 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-01-27 15:07:53,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 62 places, 65 transitions, 158 flow [2024-01-27 15:07:53,297 INFO L124 PetriNetUnfolderBase]: 12/76 cut-off events. [2024-01-27 15:07:53,297 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-01-27 15:07:53,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95 conditions, 76 events. 12/76 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 201 event pairs, 0 based on Foata normal form. 0/55 useless extension candidates. Maximal degree in co-relation 70. Up to 5 conditions per place. [2024-01-27 15:07:53,298 INFO L82 GeneralOperation]: Start removeDead. Operand has 62 places, 65 transitions, 158 flow [2024-01-27 15:07:53,298 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 62 places, 65 transitions, 158 flow [2024-01-27 15:07:53,299 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-27 15:07:53,299 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;@18a480e3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-27 15:07:53,299 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-01-27 15:07:53,301 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-27 15:07:53,301 INFO L124 PetriNetUnfolderBase]: 1/17 cut-off events. [2024-01-27 15:07:53,301 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-01-27 15:07:53,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:07:53,301 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:07:53,302 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2024-01-27 15:07:53,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:07:53,302 INFO L85 PathProgramCache]: Analyzing trace with hash 704733638, now seen corresponding path program 1 times [2024-01-27 15:07:53,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:07:53,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421443891] [2024-01-27 15:07:53,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:07:53,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:07:53,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:07:53,339 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 15:07:53,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:07:53,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421443891] [2024-01-27 15:07:53,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421443891] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:07:53,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:07:53,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-27 15:07:53,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645436338] [2024-01-27 15:07:53,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:07:53,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-27 15:07:53,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:07:53,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-27 15:07:53,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-27 15:07:53,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 65 [2024-01-27 15:07:53,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 65 transitions, 158 flow. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 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 15:07:53,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:07:53,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 65 [2024-01-27 15:07:53,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:08:00,643 INFO L124 PetriNetUnfolderBase]: 84272/123549 cut-off events. [2024-01-27 15:08:00,643 INFO L125 PetriNetUnfolderBase]: For 10204/10204 co-relation queries the response was YES. [2024-01-27 15:08:00,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 234112 conditions, 123549 events. 84272/123549 cut-off events. For 10204/10204 co-relation queries the response was YES. Maximal size of possible extension queue 4210. Compared 961341 event pairs, 37670 based on Foata normal form. 16753/123736 useless extension candidates. Maximal degree in co-relation 23402. Up to 56102 conditions per place. [2024-01-27 15:08:01,456 INFO L140 encePairwiseOnDemand]: 57/65 looper letters, 72 selfloop transitions, 2 changer transitions 0/94 dead transitions. [2024-01-27 15:08:01,457 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 94 transitions, 385 flow [2024-01-27 15:08:01,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-27 15:08:01,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-27 15:08:01,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 145 transitions. [2024-01-27 15:08:01,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7435897435897436 [2024-01-27 15:08:01,461 INFO L175 Difference]: Start difference. First operand has 62 places, 65 transitions, 158 flow. Second operand 3 states and 145 transitions. [2024-01-27 15:08:01,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 94 transitions, 385 flow [2024-01-27 15:08:01,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 94 transitions, 373 flow, removed 6 selfloop flow, removed 0 redundant places. [2024-01-27 15:08:01,467 INFO L231 Difference]: Finished difference. Result has 65 places, 61 transitions, 156 flow [2024-01-27 15:08:01,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=65, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=156, PETRI_PLACES=65, PETRI_TRANSITIONS=61} [2024-01-27 15:08:01,469 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 3 predicate places. [2024-01-27 15:08:01,469 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 61 transitions, 156 flow [2024-01-27 15:08:01,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 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 15:08:01,469 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:08:01,469 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:08:01,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-01-27 15:08:01,470 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2024-01-27 15:08:01,470 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:08:01,470 INFO L85 PathProgramCache]: Analyzing trace with hash -426327352, now seen corresponding path program 1 times [2024-01-27 15:08:01,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:08:01,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563381702] [2024-01-27 15:08:01,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:08:01,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:08:01,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:08:01,528 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 15:08:01,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:08:01,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563381702] [2024-01-27 15:08:01,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563381702] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:08:01,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:08:01,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-27 15:08:01,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413947944] [2024-01-27 15:08:01,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:08:01,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-27 15:08:01,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:08:01,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-27 15:08:01,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-27 15:08:01,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 65 [2024-01-27 15:08:01,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 61 transitions, 156 flow. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 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 15:08:01,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:08:01,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 65 [2024-01-27 15:08:01,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:08:13,953 INFO L124 PetriNetUnfolderBase]: 139728/203604 cut-off events. [2024-01-27 15:08:13,953 INFO L125 PetriNetUnfolderBase]: For 29486/29486 co-relation queries the response was YES. [2024-01-27 15:08:14,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 400263 conditions, 203604 events. 139728/203604 cut-off events. For 29486/29486 co-relation queries the response was YES. Maximal size of possible extension queue 6534. Compared 1647559 event pairs, 62178 based on Foata normal form. 0/181297 useless extension candidates. Maximal degree in co-relation 200395. Up to 92709 conditions per place. [2024-01-27 15:08:15,553 INFO L140 encePairwiseOnDemand]: 62/65 looper letters, 75 selfloop transitions, 2 changer transitions 0/96 dead transitions. [2024-01-27 15:08:15,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 96 transitions, 402 flow [2024-01-27 15:08:15,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-27 15:08:15,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-27 15:08:15,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 134 transitions. [2024-01-27 15:08:15,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6871794871794872 [2024-01-27 15:08:15,555 INFO L175 Difference]: Start difference. First operand has 65 places, 61 transitions, 156 flow. Second operand 3 states and 134 transitions. [2024-01-27 15:08:15,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 96 transitions, 402 flow [2024-01-27 15:08:15,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 96 transitions, 394 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-27 15:08:15,587 INFO L231 Difference]: Finished difference. Result has 67 places, 62 transitions, 166 flow [2024-01-27 15:08:15,588 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=65, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=166, PETRI_PLACES=67, PETRI_TRANSITIONS=62} [2024-01-27 15:08:15,588 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 5 predicate places. [2024-01-27 15:08:15,588 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 62 transitions, 166 flow [2024-01-27 15:08:15,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 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 15:08:15,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:08:15,589 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:08:15,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-01-27 15:08:15,589 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2024-01-27 15:08:15,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:08:15,589 INFO L85 PathProgramCache]: Analyzing trace with hash 1835526786, now seen corresponding path program 1 times [2024-01-27 15:08:15,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:08:15,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407292685] [2024-01-27 15:08:15,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:08:15,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:08:15,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:08:15,611 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 15:08:15,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:08:15,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407292685] [2024-01-27 15:08:15,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407292685] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:08:15,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:08:15,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-27 15:08:15,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916599675] [2024-01-27 15:08:15,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:08:15,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-27 15:08:15,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:08:15,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-27 15:08:15,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-27 15:08:15,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 65 [2024-01-27 15:08:15,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 62 transitions, 166 flow. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 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 15:08:15,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:08:15,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 65 [2024-01-27 15:08:15,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand