./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-min-max-dec.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de 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/weaver/popl20-min-max-dec.wvr.c -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 67ced8cbf918778cce3ae5cae291c50696df3950945fdf68713903c29ac269e1 --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 16:52:49,150 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 16:52:49,185 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 16:52:49,188 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 16:52:49,188 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 16:52:49,200 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 16:52:49,201 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 16:52:49,201 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 16:52:49,201 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 16:52:49,201 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 16:52:49,202 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 16:52:49,202 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 16:52:49,202 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 16:52:49,202 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 16:52:49,203 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 16:52:49,203 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 16:52:49,203 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 16:52:49,203 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 16:52:49,204 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 16:52:49,204 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 16:52:49,204 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 16:52:49,205 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 16:52:49,205 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 16:52:49,205 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 16:52:49,205 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 16:52:49,206 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 16:52:49,206 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 16:52:49,206 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 16:52:49,206 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 16:52:49,206 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 16:52:49,207 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 16:52:49,207 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 16:52:49,207 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 16:52:49,207 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 16:52:49,208 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 16:52:49,208 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 16:52:49,208 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 16:52:49,208 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 16:52:49,209 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 16:52:49,209 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 16:52:49,209 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 16:52:49,209 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 16:52:49,210 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 16:52:49,210 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 67ced8cbf918778cce3ae5cae291c50696df3950945fdf68713903c29ac269e1 [2024-06-27 16:52:49,424 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 16:52:49,448 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 16:52:49,450 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 16:52:49,451 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 16:52:49,451 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 16:52:49,457 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-min-max-dec.wvr.c [2024-06-27 16:52:50,527 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 16:52:50,674 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 16:52:50,674 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-min-max-dec.wvr.c [2024-06-27 16:52:50,680 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e50015f9e/b7fd26912dca4bda9f06be2dbfe7af2f/FLAG2269ed02b [2024-06-27 16:52:50,691 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e50015f9e/b7fd26912dca4bda9f06be2dbfe7af2f [2024-06-27 16:52:50,693 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 16:52:50,694 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-06-27 16:52:50,695 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 16:52:50,695 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 16:52:50,706 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 16:52:50,709 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 04:52:50" (1/1) ... [2024-06-27 16:52:50,709 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66482ac9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:52:50, skipping insertion in model container [2024-06-27 16:52:50,709 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 04:52:50" (1/1) ... [2024-06-27 16:52:50,735 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 16:52:50,871 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-min-max-dec.wvr.c[3071,3084] [2024-06-27 16:52:50,877 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 16:52:50,883 INFO L202 MainTranslator]: Completed pre-run [2024-06-27 16:52:50,900 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-min-max-dec.wvr.c[3071,3084] [2024-06-27 16:52:50,903 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 16:52:50,920 INFO L206 MainTranslator]: Completed translation [2024-06-27 16:52:50,920 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:52:50 WrapperNode [2024-06-27 16:52:50,920 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 16:52:50,921 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 16:52:50,921 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 16:52:50,921 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 16:52:50,927 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:52:50" (1/1) ... [2024-06-27 16:52:50,932 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:52:50" (1/1) ... [2024-06-27 16:52:50,948 INFO L138 Inliner]: procedures = 25, calls = 43, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 117 [2024-06-27 16:52:50,948 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 16:52:50,949 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 16:52:50,949 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 16:52:50,949 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 16:52:50,957 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:52:50" (1/1) ... [2024-06-27 16:52:50,957 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:52:50" (1/1) ... [2024-06-27 16:52:50,961 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:52:50" (1/1) ... [2024-06-27 16:52:50,972 INFO L175 MemorySlicer]: Split 12 memory accesses to 2 slices as follows [2, 10]. 83 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-06-27 16:52:50,972 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:52:50" (1/1) ... [2024-06-27 16:52:50,972 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:52:50" (1/1) ... [2024-06-27 16:52:50,978 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:52:50" (1/1) ... [2024-06-27 16:52:50,981 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:52:50" (1/1) ... [2024-06-27 16:52:50,982 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:52:50" (1/1) ... [2024-06-27 16:52:50,983 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:52:50" (1/1) ... [2024-06-27 16:52:50,985 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 16:52:50,986 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 16:52:50,986 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 16:52:50,986 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 16:52:50,987 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:52:50" (1/1) ... [2024-06-27 16:52:50,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 16:52:50,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:52:51,011 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) [2024-06-27 16:52:51,028 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 [2024-06-27 16:52:51,055 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 16:52:51,055 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-06-27 16:52:51,056 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-06-27 16:52:51,056 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-06-27 16:52:51,056 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-06-27 16:52:51,056 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-06-27 16:52:51,056 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-06-27 16:52:51,057 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2024-06-27 16:52:51,058 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2024-06-27 16:52:51,058 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 16:52:51,058 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-27 16:52:51,058 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-27 16:52:51,058 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-27 16:52:51,058 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 16:52:51,058 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 16:52:51,059 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-06-27 16:52:51,059 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 16:52:51,059 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 16:52:51,059 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-27 16:52:51,059 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-27 16:52:51,061 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 16:52:51,153 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 16:52:51,155 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 16:52:51,389 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 16:52:51,389 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 16:52:51,555 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 16:52:51,556 INFO L320 CfgBuilder]: Removed 4 assume(true) statements. [2024-06-27 16:52:51,556 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 04:52:51 BoogieIcfgContainer [2024-06-27 16:52:51,557 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 16:52:51,560 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 16:52:51,561 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 16:52:51,563 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 16:52:51,563 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 04:52:50" (1/3) ... [2024-06-27 16:52:51,564 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33874db0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 04:52:51, skipping insertion in model container [2024-06-27 16:52:51,564 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:52:50" (2/3) ... [2024-06-27 16:52:51,564 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33874db0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 04:52:51, skipping insertion in model container [2024-06-27 16:52:51,565 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 04:52:51" (3/3) ... [2024-06-27 16:52:51,567 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-min-max-dec.wvr.c [2024-06-27 16:52:51,573 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2024-06-27 16:52:51,580 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 16:52:51,580 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-06-27 16:52:51,581 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 16:52:51,640 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-06-27 16:52:51,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 55 places, 46 transitions, 120 flow [2024-06-27 16:52:51,689 INFO L124 PetriNetUnfolderBase]: 4/42 cut-off events. [2024-06-27 16:52:51,692 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-06-27 16:52:51,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59 conditions, 42 events. 4/42 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 89 event pairs, 0 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 37. Up to 2 conditions per place. [2024-06-27 16:52:51,697 INFO L82 GeneralOperation]: Start removeDead. Operand has 55 places, 46 transitions, 120 flow [2024-06-27 16:52:51,701 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 50 places, 41 transitions, 106 flow [2024-06-27 16:52:51,717 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 16:52:51,723 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;@529f024a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 16:52:51,724 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-06-27 16:52:51,739 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 16:52:51,739 INFO L124 PetriNetUnfolderBase]: 4/40 cut-off events. [2024-06-27 16:52:51,739 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-06-27 16:52:51,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:52:51,740 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:52:51,741 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-06-27 16:52:51,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:52:51,746 INFO L85 PathProgramCache]: Analyzing trace with hash -1137501502, now seen corresponding path program 1 times [2024-06-27 16:52:51,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:52:51,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358142609] [2024-06-27 16:52:51,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:52:51,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:52:51,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:52:52,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:52:52,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:52:52,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358142609] [2024-06-27 16:52:52,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358142609] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:52:52,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:52:52,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 16:52:52,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712049826] [2024-06-27 16:52:52,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:52:52,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 16:52:52,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:52:52,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 16:52:52,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 16:52:52,206 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-06-27 16:52:52,208 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 41 transitions, 106 flow. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 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) [2024-06-27 16:52:52,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:52:52,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-06-27 16:52:52,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:52:52,702 INFO L124 PetriNetUnfolderBase]: 3361/4866 cut-off events. [2024-06-27 16:52:52,702 INFO L125 PetriNetUnfolderBase]: For 267/267 co-relation queries the response was YES. [2024-06-27 16:52:52,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9703 conditions, 4866 events. 3361/4866 cut-off events. For 267/267 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 28189 event pairs, 1583 based on Foata normal form. 162/4816 useless extension candidates. Maximal degree in co-relation 9085. Up to 2990 conditions per place. [2024-06-27 16:52:52,736 INFO L140 encePairwiseOnDemand]: 42/46 looper letters, 42 selfloop transitions, 3 changer transitions 0/57 dead transitions. [2024-06-27 16:52:52,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 57 transitions, 237 flow [2024-06-27 16:52:52,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 16:52:52,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 16:52:52,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 110 transitions. [2024-06-27 16:52:52,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5978260869565217 [2024-06-27 16:52:52,748 INFO L175 Difference]: Start difference. First operand has 50 places, 41 transitions, 106 flow. Second operand 4 states and 110 transitions. [2024-06-27 16:52:52,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 57 transitions, 237 flow [2024-06-27 16:52:52,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 57 transitions, 215 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-27 16:52:52,763 INFO L231 Difference]: Finished difference. Result has 46 places, 42 transitions, 104 flow [2024-06-27 16:52:52,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=104, PETRI_PLACES=46, PETRI_TRANSITIONS=42} [2024-06-27 16:52:52,768 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -4 predicate places. [2024-06-27 16:52:52,769 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 42 transitions, 104 flow [2024-06-27 16:52:52,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 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) [2024-06-27 16:52:52,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:52:52,770 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:52:52,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 16:52:52,770 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-06-27 16:52:52,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:52:52,771 INFO L85 PathProgramCache]: Analyzing trace with hash -66851015, now seen corresponding path program 1 times [2024-06-27 16:52:52,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:52:52,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562433575] [2024-06-27 16:52:52,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:52:52,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:52:52,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:52:52,881 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:52:52,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:52:52,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562433575] [2024-06-27 16:52:52,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562433575] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:52:52,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:52:52,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 16:52:52,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612594840] [2024-06-27 16:52:52,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:52:52,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 16:52:52,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:52:52,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 16:52:52,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 16:52:52,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 46 [2024-06-27 16:52:52,892 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 42 transitions, 104 flow. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 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) [2024-06-27 16:52:52,892 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:52:52,892 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 46 [2024-06-27 16:52:52,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:52:53,443 INFO L124 PetriNetUnfolderBase]: 4370/6365 cut-off events. [2024-06-27 16:52:53,444 INFO L125 PetriNetUnfolderBase]: For 1112/1112 co-relation queries the response was YES. [2024-06-27 16:52:53,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13521 conditions, 6365 events. 4370/6365 cut-off events. For 1112/1112 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 37204 event pairs, 2417 based on Foata normal form. 192/6379 useless extension candidates. Maximal degree in co-relation 2091. Up to 4205 conditions per place. [2024-06-27 16:52:53,475 INFO L140 encePairwiseOnDemand]: 42/46 looper letters, 47 selfloop transitions, 3 changer transitions 0/61 dead transitions. [2024-06-27 16:52:53,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 61 transitions, 255 flow [2024-06-27 16:52:53,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 16:52:53,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 16:52:53,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 109 transitions. [2024-06-27 16:52:53,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.592391304347826 [2024-06-27 16:52:53,479 INFO L175 Difference]: Start difference. First operand has 46 places, 42 transitions, 104 flow. Second operand 4 states and 109 transitions. [2024-06-27 16:52:53,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 61 transitions, 255 flow [2024-06-27 16:52:53,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 61 transitions, 249 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-27 16:52:53,484 INFO L231 Difference]: Finished difference. Result has 48 places, 43 transitions, 114 flow [2024-06-27 16:52:53,484 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=114, PETRI_PLACES=48, PETRI_TRANSITIONS=43} [2024-06-27 16:52:53,485 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -2 predicate places. [2024-06-27 16:52:53,485 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 43 transitions, 114 flow [2024-06-27 16:52:53,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 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) [2024-06-27 16:52:53,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:52:53,486 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:52:53,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 16:52:53,488 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-06-27 16:52:53,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:52:53,489 INFO L85 PathProgramCache]: Analyzing trace with hash 319106967, now seen corresponding path program 1 times [2024-06-27 16:52:53,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:52:53,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771605794] [2024-06-27 16:52:53,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:52:53,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:52:53,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:52:53,624 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:52:53,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:52:53,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771605794] [2024-06-27 16:52:53,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771605794] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:52:53,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:52:53,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 16:52:53,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872776110] [2024-06-27 16:52:53,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:52:53,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 16:52:53,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:52:53,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 16:52:53,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 16:52:53,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 46 [2024-06-27 16:52:53,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 43 transitions, 114 flow. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 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) [2024-06-27 16:52:53,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:52:53,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 46 [2024-06-27 16:52:53,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:52:54,107 INFO L124 PetriNetUnfolderBase]: 4947/7209 cut-off events. [2024-06-27 16:52:54,107 INFO L125 PetriNetUnfolderBase]: For 1480/1745 co-relation queries the response was YES. [2024-06-27 16:52:54,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16318 conditions, 7209 events. 4947/7209 cut-off events. For 1480/1745 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 42544 event pairs, 2918 based on Foata normal form. 505/7589 useless extension candidates. Maximal degree in co-relation 4322. Up to 4773 conditions per place. [2024-06-27 16:52:54,137 INFO L140 encePairwiseOnDemand]: 42/46 looper letters, 48 selfloop transitions, 3 changer transitions 0/62 dead transitions. [2024-06-27 16:52:54,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 62 transitions, 272 flow [2024-06-27 16:52:54,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 16:52:54,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 16:52:54,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 108 transitions. [2024-06-27 16:52:54,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5869565217391305 [2024-06-27 16:52:54,141 INFO L175 Difference]: Start difference. First operand has 48 places, 43 transitions, 114 flow. Second operand 4 states and 108 transitions. [2024-06-27 16:52:54,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 62 transitions, 272 flow [2024-06-27 16:52:54,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 62 transitions, 267 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-27 16:52:54,144 INFO L231 Difference]: Finished difference. Result has 50 places, 44 transitions, 124 flow [2024-06-27 16:52:54,145 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=124, PETRI_PLACES=50, PETRI_TRANSITIONS=44} [2024-06-27 16:52:54,147 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 0 predicate places. [2024-06-27 16:52:54,147 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 44 transitions, 124 flow [2024-06-27 16:52:54,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 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) [2024-06-27 16:52:54,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:52:54,147 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:52:54,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 16:52:54,148 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-06-27 16:52:54,148 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:52:54,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1683890689, now seen corresponding path program 1 times [2024-06-27 16:52:54,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:52:54,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128492711] [2024-06-27 16:52:54,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:52:54,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:52:54,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:52:54,209 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:52:54,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:52:54,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128492711] [2024-06-27 16:52:54,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128492711] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:52:54,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:52:54,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 16:52:54,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094697251] [2024-06-27 16:52:54,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:52:54,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 16:52:54,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:52:54,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 16:52:54,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 16:52:54,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-06-27 16:52:54,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 44 transitions, 124 flow. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 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) [2024-06-27 16:52:54,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:52:54,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-06-27 16:52:54,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:52:54,623 INFO L124 PetriNetUnfolderBase]: 4245/6149 cut-off events. [2024-06-27 16:52:54,624 INFO L125 PetriNetUnfolderBase]: For 1656/2112 co-relation queries the response was YES. [2024-06-27 16:52:54,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14705 conditions, 6149 events. 4245/6149 cut-off events. For 1656/2112 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 35908 event pairs, 3544 based on Foata normal form. 456/6493 useless extension candidates. Maximal degree in co-relation 4137. Up to 5716 conditions per place. [2024-06-27 16:52:54,653 INFO L140 encePairwiseOnDemand]: 43/46 looper letters, 31 selfloop transitions, 2 changer transitions 0/45 dead transitions. [2024-06-27 16:52:54,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 45 transitions, 192 flow [2024-06-27 16:52:54,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 16:52:54,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 16:52:54,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 79 transitions. [2024-06-27 16:52:54,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.572463768115942 [2024-06-27 16:52:54,656 INFO L175 Difference]: Start difference. First operand has 50 places, 44 transitions, 124 flow. Second operand 3 states and 79 transitions. [2024-06-27 16:52:54,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 45 transitions, 192 flow [2024-06-27 16:52:54,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 45 transitions, 188 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-27 16:52:54,659 INFO L231 Difference]: Finished difference. Result has 51 places, 45 transitions, 132 flow [2024-06-27 16:52:54,659 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=132, PETRI_PLACES=51, PETRI_TRANSITIONS=45} [2024-06-27 16:52:54,660 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 1 predicate places. [2024-06-27 16:52:54,661 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 45 transitions, 132 flow [2024-06-27 16:52:54,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 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) [2024-06-27 16:52:54,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:52:54,661 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:52:54,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 16:52:54,662 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-06-27 16:52:54,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:52:54,662 INFO L85 PathProgramCache]: Analyzing trace with hash -1659799412, now seen corresponding path program 1 times [2024-06-27 16:52:54,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:52:54,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763630959] [2024-06-27 16:52:54,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:52:54,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:52:54,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:52:55,198 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:52:55,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:52:55,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763630959] [2024-06-27 16:52:55,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763630959] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:52:55,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215162333] [2024-06-27 16:52:55,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:52:55,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:52:55,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:52:55,201 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) [2024-06-27 16:52:55,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-06-27 16:52:55,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:52:55,298 INFO L262 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 25 conjunts are in the unsatisfiable core [2024-06-27 16:52:55,305 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:52:55,355 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-06-27 16:52:55,597 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-06-27 16:52:55,657 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:52:55,657 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:52:55,950 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:52:55,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215162333] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:52:55,951 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:52:55,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 11, 8] total 22 [2024-06-27 16:52:55,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201885700] [2024-06-27 16:52:55,951 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:52:55,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-06-27 16:52:55,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:52:55,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-06-27 16:52:55,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2024-06-27 16:52:56,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 46 [2024-06-27 16:52:56,017 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 45 transitions, 132 flow. Second operand has 22 states, 22 states have (on average 17.181818181818183) internal successors, (378), 22 states have internal predecessors, (378), 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) [2024-06-27 16:52:56,017 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:52:56,017 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 46 [2024-06-27 16:52:56,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:53:06,254 INFO L124 PetriNetUnfolderBase]: 93321/133930 cut-off events. [2024-06-27 16:53:06,255 INFO L125 PetriNetUnfolderBase]: For 43324/43324 co-relation queries the response was YES. [2024-06-27 16:53:06,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 317895 conditions, 133930 events. 93321/133930 cut-off events. For 43324/43324 co-relation queries the response was YES. Maximal size of possible extension queue 5030. Compared 1032485 event pairs, 2188 based on Foata normal form. 21/133945 useless extension candidates. Maximal degree in co-relation 317881. Up to 19187 conditions per place. [2024-06-27 16:53:06,710 INFO L140 encePairwiseOnDemand]: 32/46 looper letters, 614 selfloop transitions, 118 changer transitions 735/1476 dead transitions. [2024-06-27 16:53:06,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 1476 transitions, 7447 flow [2024-06-27 16:53:06,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2024-06-27 16:53:06,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2024-06-27 16:53:06,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 2514 transitions. [2024-06-27 16:53:06,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6210474308300395 [2024-06-27 16:53:06,722 INFO L175 Difference]: Start difference. First operand has 51 places, 45 transitions, 132 flow. Second operand 88 states and 2514 transitions. [2024-06-27 16:53:06,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 1476 transitions, 7447 flow [2024-06-27 16:53:07,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 1476 transitions, 7443 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-06-27 16:53:07,380 INFO L231 Difference]: Finished difference. Result has 210 places, 186 transitions, 1186 flow [2024-06-27 16:53:07,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=88, PETRI_FLOW=1186, PETRI_PLACES=210, PETRI_TRANSITIONS=186} [2024-06-27 16:53:07,381 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 160 predicate places. [2024-06-27 16:53:07,381 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 186 transitions, 1186 flow [2024-06-27 16:53:07,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 17.181818181818183) internal successors, (378), 22 states have internal predecessors, (378), 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) [2024-06-27 16:53:07,382 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:53:07,382 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:53:07,394 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-06-27 16:53:07,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:53:07,595 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-06-27 16:53:07,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:53:07,596 INFO L85 PathProgramCache]: Analyzing trace with hash 831420880, now seen corresponding path program 2 times [2024-06-27 16:53:07,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:53:07,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426272010] [2024-06-27 16:53:07,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:53:07,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:53:07,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:53:07,772 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-06-27 16:53:07,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:53:07,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426272010] [2024-06-27 16:53:07,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426272010] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:53:07,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:53:07,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 16:53:07,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064929653] [2024-06-27 16:53:07,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:53:07,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 16:53:07,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:53:07,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 16:53:07,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 16:53:07,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 46 [2024-06-27 16:53:07,781 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 186 transitions, 1186 flow. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 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) [2024-06-27 16:53:07,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:53:07,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 46 [2024-06-27 16:53:07,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:53:22,980 INFO L124 PetriNetUnfolderBase]: 73036/109441 cut-off events. [2024-06-27 16:53:22,980 INFO L125 PetriNetUnfolderBase]: For 3106923/3108807 co-relation queries the response was YES. [2024-06-27 16:53:24,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 557062 conditions, 109441 events. 73036/109441 cut-off events. For 3106923/3108807 co-relation queries the response was YES. Maximal size of possible extension queue 3948. Compared 892377 event pairs, 12909 based on Foata normal form. 1443/110626 useless extension candidates. Maximal degree in co-relation 556968. Up to 51864 conditions per place. [2024-06-27 16:53:24,401 INFO L140 encePairwiseOnDemand]: 42/46 looper letters, 160 selfloop transitions, 4 changer transitions 309/496 dead transitions. [2024-06-27 16:53:24,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 496 transitions, 3880 flow [2024-06-27 16:53:24,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 16:53:24,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 16:53:24,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 147 transitions. [2024-06-27 16:53:24,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6391304347826087 [2024-06-27 16:53:24,402 INFO L175 Difference]: Start difference. First operand has 210 places, 186 transitions, 1186 flow. Second operand 5 states and 147 transitions. [2024-06-27 16:53:24,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 496 transitions, 3880 flow