./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-ext/45_monabsex1_vs.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-02-07_10-47-16.files/SV-COMP24_unreach-call/45_monabsex1_vs.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7c74aec 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/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-ext/45_monabsex1_vs.i ./goblint.2024-02-07_10-47-16.files/SV-COMP24_unreach-call/45_monabsex1_vs.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-wip.fs.fix-undeclared-acsl-variable-e7c74ae-m [2024-02-07 19:02:42,946 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-02-07 19:02:43,015 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-02-07 19:02:43,020 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-02-07 19:02:43,021 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-02-07 19:02:43,062 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-02-07 19:02:43,063 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-02-07 19:02:43,063 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-02-07 19:02:43,064 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-02-07 19:02:43,068 INFO L153 SettingsManager]: * Use memory slicer=true [2024-02-07 19:02:43,068 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-02-07 19:02:43,068 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-02-07 19:02:43,069 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-02-07 19:02:43,070 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-02-07 19:02:43,070 INFO L153 SettingsManager]: * Use SBE=true [2024-02-07 19:02:43,070 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-02-07 19:02:43,070 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-02-07 19:02:43,071 INFO L153 SettingsManager]: * sizeof long=4 [2024-02-07 19:02:43,071 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-02-07 19:02:43,071 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-02-07 19:02:43,072 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-02-07 19:02:43,073 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-02-07 19:02:43,073 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-02-07 19:02:43,073 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-02-07 19:02:43,073 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-02-07 19:02:43,074 INFO L153 SettingsManager]: * sizeof long double=12 [2024-02-07 19:02:43,074 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-02-07 19:02:43,074 INFO L153 SettingsManager]: * Use constant arrays=true [2024-02-07 19:02:43,075 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-02-07 19:02:43,075 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-02-07 19:02:43,076 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-02-07 19:02:43,076 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-02-07 19:02:43,076 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-07 19:02:43,076 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-02-07 19:02:43,076 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-02-07 19:02:43,076 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-02-07 19:02:43,077 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-02-07 19:02:43,077 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-02-07 19:02:43,077 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-02-07 19:02:43,077 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-02-07 19:02:43,078 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-02-07 19:02:43,078 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-02-07 19:02:43,078 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-02-07 19:02:43,078 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-02-07 19:02:43,314 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-02-07 19:02:43,335 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-02-07 19:02:43,337 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-02-07 19:02:43,338 INFO L270 PluginConnector]: Initializing CDTParser... [2024-02-07 19:02:43,339 INFO L274 PluginConnector]: CDTParser initialized [2024-02-07 19:02:43,340 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/45_monabsex1_vs.i [2024-02-07 19:02:44,418 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-02-07 19:02:44,669 INFO L384 CDTParser]: Found 1 translation units. [2024-02-07 19:02:44,671 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/45_monabsex1_vs.i [2024-02-07 19:02:44,684 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/09ee35ebe/d3df119c7d1b45fa969731e8c168c894/FLAGd6a7d9d0c [2024-02-07 19:02:44,700 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/09ee35ebe/d3df119c7d1b45fa969731e8c168c894 [2024-02-07 19:02:44,702 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-02-07 19:02:44,703 INFO L274 PluginConnector]: Witness Parser initialized [2024-02-07 19:02:44,705 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-02-07_10-47-16.files/SV-COMP24_unreach-call/45_monabsex1_vs.yml/witness.yml [2024-02-07 19:02:44,791 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-02-07 19:02:44,793 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-02-07 19:02:44,794 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-02-07 19:02:44,794 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-02-07 19:02:44,797 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-02-07 19:02:44,798 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 07:02:44" (1/2) ... [2024-02-07 19:02:44,799 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18bbf244 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:02:44, skipping insertion in model container [2024-02-07 19:02:44,799 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 07:02:44" (1/2) ... [2024-02-07 19:02:44,801 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2a1549df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:02:44, skipping insertion in model container [2024-02-07 19:02:44,801 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 07:02:44" (2/2) ... [2024-02-07 19:02:44,801 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18bbf244 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:02:44, skipping insertion in model container [2024-02-07 19:02:44,802 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 07:02:44" (2/2) ... [2024-02-07 19:02:44,802 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-02-07 19:02:44,838 INFO L74 edCorrectnessWitness]: Found the following entries in the witness: [2024-02-07 19:02:44,840 INFO L76 edCorrectnessWitness]: Location invariant before [L707-L707] (4 == l) && (l == 4) [2024-02-07 19:02:44,840 INFO L76 edCorrectnessWitness]: Location invariant before [L710-L710] (4 == l) && (l == 4) [2024-02-07 19:02:44,840 INFO L76 edCorrectnessWitness]: Location invariant before [L711-L711] 4 == l [2024-02-07 19:02:44,840 INFO L76 edCorrectnessWitness]: Location invariant before [L709-L709] 4 == l [2024-02-07 19:02:44,840 INFO L76 edCorrectnessWitness]: Location invariant before [L706-L706] (4 == l) && (l == 4) [2024-02-07 19:02:44,841 INFO L76 edCorrectnessWitness]: Location invariant before [L708-L708] (4 == l) && (s == 4) [2024-02-07 19:02:44,841 INFO L76 edCorrectnessWitness]: Location invariant after [L710-L710] 4 == l [2024-02-07 19:02:44,841 INFO L76 edCorrectnessWitness]: Location invariant before [L712-L712] 4 == l [2024-02-07 19:02:44,841 INFO L76 edCorrectnessWitness]: Location invariant before [L710-L710] 4 == l [2024-02-07 19:02:44,877 INFO L181 MainTranslator]: Built tables and reachable declarations [2024-02-07 19:02:45,121 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/45_monabsex1_vs.i[30633,30646] [2024-02-07 19:02:45,128 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-02-07 19:02:45,149 INFO L206 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-02-07 19:02:45,238 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/45_monabsex1_vs.i[30633,30646] Start Parsing Local Start Parsing Local Start Parsing Local [2024-02-07 19:02:45,241 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-02-07 19:02:45,270 INFO L211 MainTranslator]: Completed translation [2024-02-07 19:02:45,271 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:02:45 WrapperNode [2024-02-07 19:02:45,271 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-02-07 19:02:45,272 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-02-07 19:02:45,272 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-02-07 19:02:45,272 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-02-07 19:02:45,277 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:02:45" (1/1) ... [2024-02-07 19:02:45,287 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:02:45" (1/1) ... [2024-02-07 19:02:45,306 INFO L138 Inliner]: procedures = 170, calls = 14, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 24 [2024-02-07 19:02:45,307 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-02-07 19:02:45,308 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-02-07 19:02:45,308 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-02-07 19:02:45,308 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-02-07 19:02:45,316 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:02:45" (1/1) ... [2024-02-07 19:02:45,316 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:02:45" (1/1) ... [2024-02-07 19:02:45,330 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:02:45" (1/1) ... [2024-02-07 19:02:45,340 INFO L175 MemorySlicer]: Split 3 memory accesses to 2 slices as follows [2, 1]. 67 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-02-07 19:02:45,340 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:02:45" (1/1) ... [2024-02-07 19:02:45,341 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:02:45" (1/1) ... [2024-02-07 19:02:45,344 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:02:45" (1/1) ... [2024-02-07 19:02:45,346 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:02:45" (1/1) ... [2024-02-07 19:02:45,348 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:02:45" (1/1) ... [2024-02-07 19:02:45,348 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:02:45" (1/1) ... [2024-02-07 19:02:45,350 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-02-07 19:02:45,351 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-02-07 19:02:45,351 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-02-07 19:02:45,351 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-02-07 19:02:45,352 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:02:45" (1/1) ... [2024-02-07 19:02:45,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-07 19:02:45,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:02:45,377 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-02-07 19:02:45,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-02-07 19:02:45,407 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2024-02-07 19:02:45,407 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2024-02-07 19:02:45,407 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-02-07 19:02:45,407 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-02-07 19:02:45,408 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-02-07 19:02:45,408 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-02-07 19:02:45,408 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-02-07 19:02:45,408 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-02-07 19:02:45,408 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-02-07 19:02:45,408 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-02-07 19:02:45,408 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-02-07 19:02:45,409 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-02-07 19:02:45,409 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-02-07 19:02:45,410 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-02-07 19:02:45,515 INFO L244 CfgBuilder]: Building ICFG [2024-02-07 19:02:45,517 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-02-07 19:02:45,606 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-02-07 19:02:45,607 INFO L293 CfgBuilder]: Performing block encoding [2024-02-07 19:02:45,680 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-02-07 19:02:45,681 INFO L320 CfgBuilder]: Removed 1 assume(true) statements. [2024-02-07 19:02:45,681 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.02 07:02:45 BoogieIcfgContainer [2024-02-07 19:02:45,681 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-02-07 19:02:45,683 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-02-07 19:02:45,683 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-02-07 19:02:45,686 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-02-07 19:02:45,686 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.02 07:02:44" (1/4) ... [2024-02-07 19:02:45,687 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37559ef8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 07:02:45, skipping insertion in model container [2024-02-07 19:02:45,687 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 07:02:44" (2/4) ... [2024-02-07 19:02:45,687 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37559ef8 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 07.02 07:02:45, skipping insertion in model container [2024-02-07 19:02:45,687 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:02:45" (3/4) ... [2024-02-07 19:02:45,688 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37559ef8 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 07.02 07:02:45, skipping insertion in model container [2024-02-07 19:02:45,688 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.02 07:02:45" (4/4) ... [2024-02-07 19:02:45,689 INFO L112 eAbstractionObserver]: Analyzing ICFG 45_monabsex1_vs.i [2024-02-07 19:02:45,703 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-02-07 19:02:45,704 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 9 error locations. [2024-02-07 19:02:45,704 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-02-07 19:02:45,745 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-02-07 19:02:45,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 23 places, 20 transitions, 44 flow [2024-02-07 19:02:45,818 INFO L124 PetriNetUnfolderBase]: 0/22 cut-off events. [2024-02-07 19:02:45,822 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-07 19:02:45,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26 conditions, 22 events. 0/22 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 31 event pairs, 0 based on Foata normal form. 0/11 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2024-02-07 19:02:45,824 INFO L82 GeneralOperation]: Start removeDead. Operand has 23 places, 20 transitions, 44 flow [2024-02-07 19:02:45,827 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 23 places, 20 transitions, 44 flow [2024-02-07 19:02:45,847 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-07 19:02:45,853 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=false, 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;@4533863d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-07 19:02:45,854 INFO L358 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2024-02-07 19:02:45,862 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-07 19:02:45,863 INFO L124 PetriNetUnfolderBase]: 0/7 cut-off events. [2024-02-07 19:02:45,863 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-07 19:02:45,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:02:45,865 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-02-07 19:02:45,865 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 16 more)] === [2024-02-07 19:02:45,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:02:45,870 INFO L85 PathProgramCache]: Analyzing trace with hash 160374367, now seen corresponding path program 1 times [2024-02-07 19:02:45,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:02:45,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658774757] [2024-02-07 19:02:45,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:02:45,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:02:45,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:02:46,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:02:46,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:02:46,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658774757] [2024-02-07 19:02:46,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658774757] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:02:46,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:02:46,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 19:02:46,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761773271] [2024-02-07 19:02:46,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:02:46,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 19:02:46,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:02:46,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 19:02:46,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 19:02:46,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 20 [2024-02-07 19:02:46,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 20 transitions, 44 flow. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:02:46,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:02:46,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 20 [2024-02-07 19:02:46,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:02:46,174 INFO L124 PetriNetUnfolderBase]: 7/26 cut-off events. [2024-02-07 19:02:46,175 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-07 19:02:46,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56 conditions, 26 events. 7/26 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. 0/24 useless extension candidates. Maximal degree in co-relation 44. Up to 21 conditions per place. [2024-02-07 19:02:46,178 INFO L140 encePairwiseOnDemand]: 10/20 looper letters, 10 selfloop transitions, 1 changer transitions 0/12 dead transitions. [2024-02-07 19:02:46,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 16 places, 12 transitions, 50 flow [2024-02-07 19:02:46,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 19:02:46,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 19:02:46,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 24 transitions. [2024-02-07 19:02:46,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-02-07 19:02:46,190 INFO L175 Difference]: Start difference. First operand has 23 places, 20 transitions, 44 flow. Second operand 3 states and 24 transitions. [2024-02-07 19:02:46,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 16 places, 12 transitions, 50 flow [2024-02-07 19:02:46,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 16 places, 12 transitions, 50 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-02-07 19:02:46,195 INFO L231 Difference]: Finished difference. Result has 16 places, 11 transitions, 28 flow [2024-02-07 19:02:46,197 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=26, PETRI_DIFFERENCE_MINUEND_PLACES=14, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=11, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=28, PETRI_PLACES=16, PETRI_TRANSITIONS=11} [2024-02-07 19:02:46,200 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, -7 predicate places. [2024-02-07 19:02:46,200 INFO L495 AbstractCegarLoop]: Abstraction has has 16 places, 11 transitions, 28 flow [2024-02-07 19:02:46,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:02:46,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:02:46,201 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-02-07 19:02:46,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-02-07 19:02:46,201 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 16 more)] === [2024-02-07 19:02:46,202 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:02:46,202 INFO L85 PathProgramCache]: Analyzing trace with hash 160374226, now seen corresponding path program 1 times [2024-02-07 19:02:46,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:02:46,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21829432] [2024-02-07 19:02:46,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:02:46,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:02:46,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-07 19:02:46,315 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-02-07 19:02:46,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-07 19:02:46,365 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-02-07 19:02:46,366 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-02-07 19:02:46,368 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (18 of 19 remaining) [2024-02-07 19:02:46,369 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (17 of 19 remaining) [2024-02-07 19:02:46,370 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (16 of 19 remaining) [2024-02-07 19:02:46,370 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (15 of 19 remaining) [2024-02-07 19:02:46,370 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (14 of 19 remaining) [2024-02-07 19:02:46,370 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (13 of 19 remaining) [2024-02-07 19:02:46,370 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (12 of 19 remaining) [2024-02-07 19:02:46,371 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONERROR_FUNCTION (11 of 19 remaining) [2024-02-07 19:02:46,371 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONWITNESS_INVARIANT (10 of 19 remaining) [2024-02-07 19:02:46,372 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONWITNESS_INVARIANT (9 of 19 remaining) [2024-02-07 19:02:46,372 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (8 of 19 remaining) [2024-02-07 19:02:46,373 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (7 of 19 remaining) [2024-02-07 19:02:46,373 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (6 of 19 remaining) [2024-02-07 19:02:46,373 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (5 of 19 remaining) [2024-02-07 19:02:46,373 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 19 remaining) [2024-02-07 19:02:46,374 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 19 remaining) [2024-02-07 19:02:46,374 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONERROR_FUNCTION (2 of 19 remaining) [2024-02-07 19:02:46,374 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONWITNESS_INVARIANT (1 of 19 remaining) [2024-02-07 19:02:46,374 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONWITNESS_INVARIANT (0 of 19 remaining) [2024-02-07 19:02:46,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-02-07 19:02:46,375 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2024-02-07 19:02:46,377 WARN L234 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-02-07 19:02:46,377 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-02-07 19:02:46,404 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-02-07 19:02:46,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 41 places, 36 transitions, 82 flow [2024-02-07 19:02:46,417 INFO L124 PetriNetUnfolderBase]: 0/40 cut-off events. [2024-02-07 19:02:46,419 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-02-07 19:02:46,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 40 events. 0/40 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 106 event pairs, 0 based on Foata normal form. 0/19 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2024-02-07 19:02:46,419 INFO L82 GeneralOperation]: Start removeDead. Operand has 41 places, 36 transitions, 82 flow [2024-02-07 19:02:46,420 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 36 transitions, 82 flow [2024-02-07 19:02:46,426 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-07 19:02:46,430 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=false, 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;@4533863d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-07 19:02:46,431 INFO L358 AbstractCegarLoop]: Starting to check reachability of 28 error locations. [2024-02-07 19:02:46,434 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-07 19:02:46,434 INFO L124 PetriNetUnfolderBase]: 0/7 cut-off events. [2024-02-07 19:02:46,434 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-02-07 19:02:46,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:02:46,434 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-02-07 19:02:46,435 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 25 more)] === [2024-02-07 19:02:46,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:02:46,436 INFO L85 PathProgramCache]: Analyzing trace with hash 194744242, now seen corresponding path program 1 times [2024-02-07 19:02:46,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:02:46,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584499542] [2024-02-07 19:02:46,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:02:46,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:02:46,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:02:46,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:02:46,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:02:46,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584499542] [2024-02-07 19:02:46,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584499542] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:02:46,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:02:46,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 19:02:46,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957335995] [2024-02-07 19:02:46,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:02:46,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 19:02:46,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:02:46,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 19:02:46,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 19:02:46,500 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 36 [2024-02-07 19:02:46,500 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 36 transitions, 82 flow. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:02:46,500 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:02:46,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 36 [2024-02-07 19:02:46,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:02:46,614 INFO L124 PetriNetUnfolderBase]: 175/332 cut-off events. [2024-02-07 19:02:46,614 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2024-02-07 19:02:46,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 683 conditions, 332 events. 175/332 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1565 event pairs, 7 based on Foata normal form. 0/262 useless extension candidates. Maximal degree in co-relation 586. Up to 294 conditions per place. [2024-02-07 19:02:46,618 INFO L140 encePairwiseOnDemand]: 23/36 looper letters, 26 selfloop transitions, 1 changer transitions 0/33 dead transitions. [2024-02-07 19:02:46,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 33 transitions, 135 flow [2024-02-07 19:02:46,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 19:02:46,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 19:02:46,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 61 transitions. [2024-02-07 19:02:46,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5648148148148148 [2024-02-07 19:02:46,620 INFO L175 Difference]: Start difference. First operand has 41 places, 36 transitions, 82 flow. Second operand 3 states and 61 transitions. [2024-02-07 19:02:46,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 33 transitions, 135 flow [2024-02-07 19:02:46,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 33 transitions, 135 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-02-07 19:02:46,621 INFO L231 Difference]: Finished difference. Result has 31 places, 24 transitions, 60 flow [2024-02-07 19:02:46,621 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=60, PETRI_PLACES=31, PETRI_TRANSITIONS=24} [2024-02-07 19:02:46,622 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, -10 predicate places. [2024-02-07 19:02:46,622 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 24 transitions, 60 flow [2024-02-07 19:02:46,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:02:46,622 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:02:46,622 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1] [2024-02-07 19:02:46,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-02-07 19:02:46,622 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 25 more)] === [2024-02-07 19:02:46,622 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:02:46,623 INFO L85 PathProgramCache]: Analyzing trace with hash -1829919271, now seen corresponding path program 1 times [2024-02-07 19:02:46,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:02:46,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133542420] [2024-02-07 19:02:46,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:02:46,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:02:46,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-07 19:02:46,639 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-02-07 19:02:46,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-07 19:02:46,664 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-02-07 19:02:46,665 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-02-07 19:02:46,665 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (27 of 28 remaining) [2024-02-07 19:02:46,665 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (26 of 28 remaining) [2024-02-07 19:02:46,665 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (25 of 28 remaining) [2024-02-07 19:02:46,665 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (24 of 28 remaining) [2024-02-07 19:02:46,665 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (23 of 28 remaining) [2024-02-07 19:02:46,666 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (22 of 28 remaining) [2024-02-07 19:02:46,666 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (21 of 28 remaining) [2024-02-07 19:02:46,666 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONERROR_FUNCTION (20 of 28 remaining) [2024-02-07 19:02:46,666 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONWITNESS_INVARIANT (19 of 28 remaining) [2024-02-07 19:02:46,666 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONWITNESS_INVARIANT (18 of 28 remaining) [2024-02-07 19:02:46,666 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (17 of 28 remaining) [2024-02-07 19:02:46,666 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (16 of 28 remaining) [2024-02-07 19:02:46,666 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (15 of 28 remaining) [2024-02-07 19:02:46,666 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (14 of 28 remaining) [2024-02-07 19:02:46,666 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (13 of 28 remaining) [2024-02-07 19:02:46,667 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (12 of 28 remaining) [2024-02-07 19:02:46,667 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONERROR_FUNCTION (11 of 28 remaining) [2024-02-07 19:02:46,667 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONWITNESS_INVARIANT (10 of 28 remaining) [2024-02-07 19:02:46,667 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONWITNESS_INVARIANT (9 of 28 remaining) [2024-02-07 19:02:46,667 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (8 of 28 remaining) [2024-02-07 19:02:46,667 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (7 of 28 remaining) [2024-02-07 19:02:46,667 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (6 of 28 remaining) [2024-02-07 19:02:46,667 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (5 of 28 remaining) [2024-02-07 19:02:46,667 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 28 remaining) [2024-02-07 19:02:46,667 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 28 remaining) [2024-02-07 19:02:46,668 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONERROR_FUNCTION (2 of 28 remaining) [2024-02-07 19:02:46,668 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONWITNESS_INVARIANT (1 of 28 remaining) [2024-02-07 19:02:46,668 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONWITNESS_INVARIANT (0 of 28 remaining) [2024-02-07 19:02:46,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-02-07 19:02:46,668 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2024-02-07 19:02:46,669 WARN L234 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-02-07 19:02:46,669 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-02-07 19:02:46,693 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-02-07 19:02:46,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 59 places, 52 transitions, 122 flow [2024-02-07 19:02:46,709 INFO L124 PetriNetUnfolderBase]: 0/58 cut-off events. [2024-02-07 19:02:46,710 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-02-07 19:02:46,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71 conditions, 58 events. 0/58 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 205 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 0. Up to 4 conditions per place. [2024-02-07 19:02:46,710 INFO L82 GeneralOperation]: Start removeDead. Operand has 59 places, 52 transitions, 122 flow [2024-02-07 19:02:46,713 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 59 places, 52 transitions, 122 flow [2024-02-07 19:02:46,714 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-07 19:02:46,719 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=false, 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;@4533863d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-07 19:02:46,719 INFO L358 AbstractCegarLoop]: Starting to check reachability of 37 error locations. [2024-02-07 19:02:46,721 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-07 19:02:46,721 INFO L124 PetriNetUnfolderBase]: 0/8 cut-off events. [2024-02-07 19:02:46,721 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-02-07 19:02:46,721 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:02:46,721 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-02-07 19:02:46,721 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 34 more)] === [2024-02-07 19:02:46,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:02:46,723 INFO L85 PathProgramCache]: Analyzing trace with hash 244382517, now seen corresponding path program 1 times [2024-02-07 19:02:46,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:02:46,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871983312] [2024-02-07 19:02:46,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:02:46,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:02:46,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:02:46,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:02:46,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:02:46,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871983312] [2024-02-07 19:02:46,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871983312] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:02:46,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:02:46,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 19:02:46,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217776780] [2024-02-07 19:02:46,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:02:46,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 19:02:46,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:02:46,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 19:02:46,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 19:02:46,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-02-07 19:02:46,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 52 transitions, 122 flow. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:02:46,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:02:46,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-02-07 19:02:46,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:02:47,144 INFO L124 PetriNetUnfolderBase]: 2415/3952 cut-off events. [2024-02-07 19:02:47,145 INFO L125 PetriNetUnfolderBase]: For 424/424 co-relation queries the response was YES. [2024-02-07 19:02:47,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7824 conditions, 3952 events. 2415/3952 cut-off events. For 424/424 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 24713 event pairs, 1231 based on Foata normal form. 0/2900 useless extension candidates. Maximal degree in co-relation 3720. Up to 3262 conditions per place. [2024-02-07 19:02:47,172 INFO L140 encePairwiseOnDemand]: 36/52 looper letters, 42 selfloop transitions, 1 changer transitions 0/54 dead transitions. [2024-02-07 19:02:47,173 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 54 transitions, 224 flow [2024-02-07 19:02:47,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 19:02:47,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 19:02:47,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 98 transitions. [2024-02-07 19:02:47,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6282051282051282 [2024-02-07 19:02:47,175 INFO L175 Difference]: Start difference. First operand has 59 places, 52 transitions, 122 flow. Second operand 3 states and 98 transitions. [2024-02-07 19:02:47,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 54 transitions, 224 flow [2024-02-07 19:02:47,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 54 transitions, 220 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-02-07 19:02:47,179 INFO L231 Difference]: Finished difference. Result has 46 places, 37 transitions, 92 flow [2024-02-07 19:02:47,179 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=92, PETRI_PLACES=46, PETRI_TRANSITIONS=37} [2024-02-07 19:02:47,181 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, -13 predicate places. [2024-02-07 19:02:47,181 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 37 transitions, 92 flow [2024-02-07 19:02:47,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:02:47,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:02:47,181 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2024-02-07 19:02:47,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-02-07 19:02:47,182 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 34 more)] === [2024-02-07 19:02:47,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:02:47,182 INFO L85 PathProgramCache]: Analyzing trace with hash -1372160087, now seen corresponding path program 1 times [2024-02-07 19:02:47,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:02:47,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113762165] [2024-02-07 19:02:47,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:02:47,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:02:47,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:02:47,231 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-07 19:02:47,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:02:47,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113762165] [2024-02-07 19:02:47,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113762165] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:02:47,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:02:47,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 19:02:47,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989077996] [2024-02-07 19:02:47,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:02:47,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 19:02:47,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:02:47,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 19:02:47,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 19:02:47,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-02-07 19:02:47,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 37 transitions, 92 flow. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:02:47,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:02:47,249 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-02-07 19:02:47,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:02:47,464 INFO L124 PetriNetUnfolderBase]: 1775/2712 cut-off events. [2024-02-07 19:02:47,464 INFO L125 PetriNetUnfolderBase]: For 310/310 co-relation queries the response was YES. [2024-02-07 19:02:47,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5681 conditions, 2712 events. 1775/2712 cut-off events. For 310/310 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 15454 event pairs, 137 based on Foata normal form. 0/2146 useless extension candidates. Maximal degree in co-relation 4531. Up to 2394 conditions per place. [2024-02-07 19:02:47,480 INFO L140 encePairwiseOnDemand]: 46/52 looper letters, 37 selfloop transitions, 1 changer transitions 0/46 dead transitions. [2024-02-07 19:02:47,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 46 transitions, 193 flow [2024-02-07 19:02:47,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 19:02:47,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 19:02:47,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 76 transitions. [2024-02-07 19:02:47,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48717948717948717 [2024-02-07 19:02:47,486 INFO L175 Difference]: Start difference. First operand has 46 places, 37 transitions, 92 flow. Second operand 3 states and 76 transitions. [2024-02-07 19:02:47,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 46 transitions, 193 flow [2024-02-07 19:02:47,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 46 transitions, 191 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-07 19:02:47,490 INFO L231 Difference]: Finished difference. Result has 42 places, 32 transitions, 83 flow [2024-02-07 19:02:47,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=81, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=83, PETRI_PLACES=42, PETRI_TRANSITIONS=32} [2024-02-07 19:02:47,493 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, -17 predicate places. [2024-02-07 19:02:47,493 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 32 transitions, 83 flow [2024-02-07 19:02:47,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:02:47,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:02:47,494 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:02:47,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-02-07 19:02:47,494 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err6ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 34 more)] === [2024-02-07 19:02:47,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:02:47,495 INFO L85 PathProgramCache]: Analyzing trace with hash 430277321, now seen corresponding path program 1 times [2024-02-07 19:02:47,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:02:47,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518248481] [2024-02-07 19:02:47,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:02:47,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:02:47,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:02:47,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:02:47,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:02:47,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518248481] [2024-02-07 19:02:47,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518248481] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:02:47,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:02:47,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-07 19:02:47,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035690543] [2024-02-07 19:02:47,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:02:47,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 19:02:47,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:02:47,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 19:02:47,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-07 19:02:47,567 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-02-07 19:02:47,567 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 83 flow. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:02:47,567 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:02:47,567 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-02-07 19:02:47,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:02:47,793 INFO L124 PetriNetUnfolderBase]: 1719/2778 cut-off events. [2024-02-07 19:02:47,793 INFO L125 PetriNetUnfolderBase]: For 317/317 co-relation queries the response was YES. [2024-02-07 19:02:47,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5850 conditions, 2778 events. 1719/2778 cut-off events. For 317/317 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 16460 event pairs, 187 based on Foata normal form. 0/2450 useless extension candidates. Maximal degree in co-relation 5756. Up to 1836 conditions per place. [2024-02-07 19:02:47,806 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 47 selfloop transitions, 6 changer transitions 0/61 dead transitions. [2024-02-07 19:02:47,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 61 transitions, 271 flow [2024-02-07 19:02:47,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-07 19:02:47,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-07 19:02:47,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 100 transitions. [2024-02-07 19:02:47,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4807692307692308 [2024-02-07 19:02:47,808 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 83 flow. Second operand 4 states and 100 transitions. [2024-02-07 19:02:47,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 61 transitions, 271 flow [2024-02-07 19:02:47,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 61 transitions, 268 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-07 19:02:47,810 INFO L231 Difference]: Finished difference. Result has 45 places, 36 transitions, 127 flow [2024-02-07 19:02:47,811 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=127, PETRI_PLACES=45, PETRI_TRANSITIONS=36} [2024-02-07 19:02:47,811 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, -14 predicate places. [2024-02-07 19:02:47,811 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 36 transitions, 127 flow [2024-02-07 19:02:47,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:02:47,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:02:47,811 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1] [2024-02-07 19:02:47,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-02-07 19:02:47,812 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 34 more)] === [2024-02-07 19:02:47,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:02:47,812 INFO L85 PathProgramCache]: Analyzing trace with hash -91902769, now seen corresponding path program 1 times [2024-02-07 19:02:47,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:02:47,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311117207] [2024-02-07 19:02:47,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:02:47,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:02:47,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-07 19:02:47,828 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-02-07 19:02:47,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-07 19:02:47,835 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-02-07 19:02:47,835 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-02-07 19:02:47,835 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (36 of 37 remaining) [2024-02-07 19:02:47,835 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (35 of 37 remaining) [2024-02-07 19:02:47,835 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (34 of 37 remaining) [2024-02-07 19:02:47,835 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (33 of 37 remaining) [2024-02-07 19:02:47,835 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (32 of 37 remaining) [2024-02-07 19:02:47,835 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (31 of 37 remaining) [2024-02-07 19:02:47,835 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (30 of 37 remaining) [2024-02-07 19:02:47,835 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONERROR_FUNCTION (29 of 37 remaining) [2024-02-07 19:02:47,836 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONWITNESS_INVARIANT (28 of 37 remaining) [2024-02-07 19:02:47,836 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONWITNESS_INVARIANT (27 of 37 remaining) [2024-02-07 19:02:47,836 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (26 of 37 remaining) [2024-02-07 19:02:47,836 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (25 of 37 remaining) [2024-02-07 19:02:47,836 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (24 of 37 remaining) [2024-02-07 19:02:47,836 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (23 of 37 remaining) [2024-02-07 19:02:47,836 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (22 of 37 remaining) [2024-02-07 19:02:47,836 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (21 of 37 remaining) [2024-02-07 19:02:47,836 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONERROR_FUNCTION (20 of 37 remaining) [2024-02-07 19:02:47,836 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONWITNESS_INVARIANT (19 of 37 remaining) [2024-02-07 19:02:47,836 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONWITNESS_INVARIANT (18 of 37 remaining) [2024-02-07 19:02:47,836 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (17 of 37 remaining) [2024-02-07 19:02:47,836 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (16 of 37 remaining) [2024-02-07 19:02:47,837 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (15 of 37 remaining) [2024-02-07 19:02:47,837 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (14 of 37 remaining) [2024-02-07 19:02:47,837 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (13 of 37 remaining) [2024-02-07 19:02:47,837 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (12 of 37 remaining) [2024-02-07 19:02:47,837 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONERROR_FUNCTION (11 of 37 remaining) [2024-02-07 19:02:47,837 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONWITNESS_INVARIANT (10 of 37 remaining) [2024-02-07 19:02:47,837 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONWITNESS_INVARIANT (9 of 37 remaining) [2024-02-07 19:02:47,837 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (8 of 37 remaining) [2024-02-07 19:02:47,837 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (7 of 37 remaining) [2024-02-07 19:02:47,837 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (6 of 37 remaining) [2024-02-07 19:02:47,837 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (5 of 37 remaining) [2024-02-07 19:02:47,837 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 37 remaining) [2024-02-07 19:02:47,837 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 37 remaining) [2024-02-07 19:02:47,838 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONERROR_FUNCTION (2 of 37 remaining) [2024-02-07 19:02:47,838 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONWITNESS_INVARIANT (1 of 37 remaining) [2024-02-07 19:02:47,838 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONWITNESS_INVARIANT (0 of 37 remaining) [2024-02-07 19:02:47,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-02-07 19:02:47,838 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2024-02-07 19:02:47,838 WARN L234 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2024-02-07 19:02:47,838 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2024-02-07 19:02:47,874 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-02-07 19:02:47,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 77 places, 68 transitions, 164 flow [2024-02-07 19:02:47,882 INFO L124 PetriNetUnfolderBase]: 0/76 cut-off events. [2024-02-07 19:02:47,882 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-02-07 19:02:47,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95 conditions, 76 events. 0/76 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 291 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 0. Up to 5 conditions per place. [2024-02-07 19:02:47,883 INFO L82 GeneralOperation]: Start removeDead. Operand has 77 places, 68 transitions, 164 flow [2024-02-07 19:02:47,884 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 77 places, 68 transitions, 164 flow [2024-02-07 19:02:47,885 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-07 19:02:47,886 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=false, 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;@4533863d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-07 19:02:47,886 INFO L358 AbstractCegarLoop]: Starting to check reachability of 46 error locations. [2024-02-07 19:02:47,887 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-07 19:02:47,887 INFO L124 PetriNetUnfolderBase]: 0/8 cut-off events. [2024-02-07 19:02:47,887 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-02-07 19:02:47,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:02:47,888 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-02-07 19:02:47,888 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 43 more)] === [2024-02-07 19:02:47,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:02:47,888 INFO L85 PathProgramCache]: Analyzing trace with hash 309290152, now seen corresponding path program 1 times [2024-02-07 19:02:47,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:02:47,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370214290] [2024-02-07 19:02:47,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:02:47,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:02:47,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:02:47,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:02:47,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:02:47,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370214290] [2024-02-07 19:02:47,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370214290] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:02:47,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:02:47,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 19:02:47,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505105746] [2024-02-07 19:02:47,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:02:47,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 19:02:47,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:02:47,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 19:02:47,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 19:02:47,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 68 [2024-02-07 19:02:47,912 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 68 transitions, 164 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) [2024-02-07 19:02:47,912 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:02:47,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 68 [2024-02-07 19:02:47,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:02:50,134 INFO L124 PetriNetUnfolderBase]: 27503/37484 cut-off events. [2024-02-07 19:02:50,134 INFO L125 PetriNetUnfolderBase]: For 5789/5789 co-relation queries the response was YES. [2024-02-07 19:02:50,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77197 conditions, 37484 events. 27503/37484 cut-off events. For 5789/5789 co-relation queries the response was YES. Maximal size of possible extension queue 1716. Compared 249821 event pairs, 2415 based on Foata normal form. 0/26024 useless extension candidates. Maximal degree in co-relation 8142. Up to 33278 conditions per place. [2024-02-07 19:02:50,387 INFO L140 encePairwiseOnDemand]: 49/68 looper letters, 58 selfloop transitions, 1 changer transitions 0/75 dead transitions. [2024-02-07 19:02:50,387 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 75 transitions, 317 flow [2024-02-07 19:02:50,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 19:02:50,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 19:02:50,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 135 transitions. [2024-02-07 19:02:50,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6617647058823529 [2024-02-07 19:02:50,389 INFO L175 Difference]: Start difference. First operand has 77 places, 68 transitions, 164 flow. Second operand 3 states and 135 transitions. [2024-02-07 19:02:50,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 75 transitions, 317 flow [2024-02-07 19:02:50,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 75 transitions, 305 flow, removed 6 selfloop flow, removed 0 redundant places. [2024-02-07 19:02:50,393 INFO L231 Difference]: Finished difference. Result has 61 places, 50 transitions, 124 flow [2024-02-07 19:02:50,393 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=124, PETRI_PLACES=61, PETRI_TRANSITIONS=50} [2024-02-07 19:02:50,394 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, -16 predicate places. [2024-02-07 19:02:50,394 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 50 transitions, 124 flow [2024-02-07 19:02:50,394 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) [2024-02-07 19:02:50,394 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:02:50,394 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2024-02-07 19:02:50,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-02-07 19:02:50,395 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 43 more)] === [2024-02-07 19:02:50,395 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:02:50,395 INFO L85 PathProgramCache]: Analyzing trace with hash 874090795, now seen corresponding path program 1 times [2024-02-07 19:02:50,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:02:50,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738824260] [2024-02-07 19:02:50,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:02:50,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:02:50,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:02:50,414 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-07 19:02:50,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:02:50,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738824260] [2024-02-07 19:02:50,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738824260] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:02:50,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:02:50,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 19:02:50,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391194550] [2024-02-07 19:02:50,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:02:50,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 19:02:50,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:02:50,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 19:02:50,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 19:02:50,421 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 68 [2024-02-07 19:02:50,422 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 50 transitions, 124 flow. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:02:50,422 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:02:50,422 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 68 [2024-02-07 19:02:50,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:02:51,963 INFO L124 PetriNetUnfolderBase]: 20335/27866 cut-off events. [2024-02-07 19:02:51,963 INFO L125 PetriNetUnfolderBase]: For 2671/2671 co-relation queries the response was YES. [2024-02-07 19:02:52,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57716 conditions, 27866 events. 20335/27866 cut-off events. For 2671/2671 co-relation queries the response was YES. Maximal size of possible extension queue 1242. Compared 179755 event pairs, 1785 based on Foata normal form. 0/20722 useless extension candidates. Maximal degree in co-relation 46697. Up to 24682 conditions per place. [2024-02-07 19:02:52,138 INFO L140 encePairwiseOnDemand]: 62/68 looper letters, 53 selfloop transitions, 1 changer transitions 0/67 dead transitions. [2024-02-07 19:02:52,138 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 67 transitions, 278 flow [2024-02-07 19:02:52,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 19:02:52,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 19:02:52,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 107 transitions. [2024-02-07 19:02:52,140 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5245098039215687 [2024-02-07 19:02:52,140 INFO L175 Difference]: Start difference. First operand has 61 places, 50 transitions, 124 flow. Second operand 3 states and 107 transitions. [2024-02-07 19:02:52,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 67 transitions, 278 flow [2024-02-07 19:02:52,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 67 transitions, 276 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-07 19:02:52,144 INFO L231 Difference]: Finished difference. Result has 57 places, 45 transitions, 115 flow [2024-02-07 19:02:52,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=113, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=115, PETRI_PLACES=57, PETRI_TRANSITIONS=45} [2024-02-07 19:02:52,146 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, -20 predicate places. [2024-02-07 19:02:52,146 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 45 transitions, 115 flow [2024-02-07 19:02:52,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:02:52,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:02:52,147 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:02:52,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-02-07 19:02:52,147 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err6ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 43 more)] === [2024-02-07 19:02:52,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:02:52,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1358430825, now seen corresponding path program 1 times [2024-02-07 19:02:52,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:02:52,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775781421] [2024-02-07 19:02:52,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:02:52,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:02:52,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:02:52,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:02:52,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:02:52,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775781421] [2024-02-07 19:02:52,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775781421] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:02:52,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:02:52,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 19:02:52,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084353439] [2024-02-07 19:02:52,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:02:52,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 19:02:52,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:02:52,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 19:02:52,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 19:02:52,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 68 [2024-02-07 19:02:52,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 45 transitions, 115 flow. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:02:52,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:02:52,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 68 [2024-02-07 19:02:52,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:02:53,946 INFO L124 PetriNetUnfolderBase]: 21479/32122 cut-off events. [2024-02-07 19:02:53,946 INFO L125 PetriNetUnfolderBase]: For 3483/3483 co-relation queries the response was YES. [2024-02-07 19:02:53,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64763 conditions, 32122 events. 21479/32122 cut-off events. For 3483/3483 co-relation queries the response was YES. Maximal size of possible extension queue 1680. Compared 243180 event pairs, 11921 based on Foata normal form. 0/23714 useless extension candidates. Maximal degree in co-relation 56044. Up to 18804 conditions per place. [2024-02-07 19:02:54,147 INFO L140 encePairwiseOnDemand]: 62/68 looper letters, 50 selfloop transitions, 5 changer transitions 0/70 dead transitions. [2024-02-07 19:02:54,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 70 transitions, 292 flow [2024-02-07 19:02:54,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 19:02:54,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 19:02:54,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 119 transitions. [2024-02-07 19:02:54,149 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-02-07 19:02:54,149 INFO L175 Difference]: Start difference. First operand has 57 places, 45 transitions, 115 flow. Second operand 3 states and 119 transitions. [2024-02-07 19:02:54,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 70 transitions, 292 flow [2024-02-07 19:02:54,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 70 transitions, 290 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-07 19:02:54,154 INFO L231 Difference]: Finished difference. Result has 60 places, 49 transitions, 152 flow [2024-02-07 19:02:54,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=152, PETRI_PLACES=60, PETRI_TRANSITIONS=49} [2024-02-07 19:02:54,155 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, -17 predicate places. [2024-02-07 19:02:54,155 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 49 transitions, 152 flow [2024-02-07 19:02:54,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:02:54,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:02:54,155 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2024-02-07 19:02:54,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-02-07 19:02:54,156 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 43 more)] === [2024-02-07 19:02:54,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:02:54,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1813799633, now seen corresponding path program 1 times [2024-02-07 19:02:54,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:02:54,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044782428] [2024-02-07 19:02:54,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:02:54,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:02:54,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:02:54,173 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-02-07 19:02:54,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:02:54,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044782428] [2024-02-07 19:02:54,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044782428] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:02:54,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:02:54,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 19:02:54,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670456826] [2024-02-07 19:02:54,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:02:54,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 19:02:54,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:02:54,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 19:02:54,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 19:02:54,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 68 [2024-02-07 19:02:54,180 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 49 transitions, 152 flow. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:02:54,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:02:54,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 68 [2024-02-07 19:02:54,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:02:55,813 INFO L124 PetriNetUnfolderBase]: 21479/29623 cut-off events. [2024-02-07 19:02:55,814 INFO L125 PetriNetUnfolderBase]: For 10555/10555 co-relation queries the response was YES. [2024-02-07 19:02:55,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71355 conditions, 29623 events. 21479/29623 cut-off events. For 10555/10555 co-relation queries the response was YES. Maximal size of possible extension queue 1342. Compared 191076 event pairs, 3235 based on Foata normal form. 908/26400 useless extension candidates. Maximal degree in co-relation 62662. Up to 26246 conditions per place. [2024-02-07 19:02:55,976 INFO L140 encePairwiseOnDemand]: 62/68 looper letters, 55 selfloop transitions, 1 changer transitions 0/66 dead transitions. [2024-02-07 19:02:55,977 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 66 transitions, 329 flow [2024-02-07 19:02:55,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 19:02:55,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 19:02:55,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 102 transitions. [2024-02-07 19:02:55,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-02-07 19:02:55,978 INFO L175 Difference]: Start difference. First operand has 60 places, 49 transitions, 152 flow. Second operand 3 states and 102 transitions. [2024-02-07 19:02:55,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 66 transitions, 329 flow [2024-02-07 19:02:56,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 66 transitions, 311 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-07 19:02:56,037 INFO L231 Difference]: Finished difference. Result has 55 places, 44 transitions, 134 flow [2024-02-07 19:02:56,037 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=134, PETRI_PLACES=55, PETRI_TRANSITIONS=44} [2024-02-07 19:02:56,038 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, -22 predicate places. [2024-02-07 19:02:56,038 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 44 transitions, 134 flow [2024-02-07 19:02:56,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:02:56,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:02:56,039 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:02:56,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-02-07 19:02:56,039 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err6ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 43 more)] === [2024-02-07 19:02:56,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:02:56,039 INFO L85 PathProgramCache]: Analyzing trace with hash -347464395, now seen corresponding path program 1 times [2024-02-07 19:02:56,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:02:56,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771881719] [2024-02-07 19:02:56,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:02:56,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:02:56,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:02:56,078 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-07 19:02:56,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:02:56,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771881719] [2024-02-07 19:02:56,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771881719] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:02:56,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:02:56,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-07 19:02:56,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815804551] [2024-02-07 19:02:56,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:02:56,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 19:02:56,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:02:56,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 19:02:56,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-07 19:02:56,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 68 [2024-02-07 19:02:56,085 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 44 transitions, 134 flow. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:02:56,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:02:56,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 68 [2024-02-07 19:02:56,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:02:57,748 INFO L124 PetriNetUnfolderBase]: 20971/30321 cut-off events. [2024-02-07 19:02:57,749 INFO L125 PetriNetUnfolderBase]: For 7674/7674 co-relation queries the response was YES. [2024-02-07 19:02:57,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70792 conditions, 30321 events. 20971/30321 cut-off events. For 7674/7674 co-relation queries the response was YES. Maximal size of possible extension queue 1407. Compared 207903 event pairs, 3131 based on Foata normal form. 0/28095 useless extension candidates. Maximal degree in co-relation 61705. Up to 20900 conditions per place. [2024-02-07 19:02:57,941 INFO L140 encePairwiseOnDemand]: 56/68 looper letters, 67 selfloop transitions, 12 changer transitions 0/89 dead transitions. [2024-02-07 19:02:57,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 89 transitions, 442 flow [2024-02-07 19:02:57,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-07 19:02:57,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-07 19:02:57,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 136 transitions. [2024-02-07 19:02:57,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-02-07 19:02:57,944 INFO L175 Difference]: Start difference. First operand has 55 places, 44 transitions, 134 flow. Second operand 4 states and 136 transitions. [2024-02-07 19:02:57,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 89 transitions, 442 flow [2024-02-07 19:02:57,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 89 transitions, 439 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-07 19:02:57,949 INFO L231 Difference]: Finished difference. Result has 58 places, 54 transitions, 246 flow [2024-02-07 19:02:57,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=131, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=246, PETRI_PLACES=58, PETRI_TRANSITIONS=54} [2024-02-07 19:02:57,951 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, -19 predicate places. [2024-02-07 19:02:57,951 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 54 transitions, 246 flow [2024-02-07 19:02:57,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:02:57,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:02:57,951 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 1, 1, 1, 1, 1, 1] [2024-02-07 19:02:57,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-02-07 19:02:57,952 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 43 more)] === [2024-02-07 19:02:57,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:02:57,952 INFO L85 PathProgramCache]: Analyzing trace with hash 695195956, now seen corresponding path program 1 times [2024-02-07 19:02:57,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:02:57,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168502208] [2024-02-07 19:02:57,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:02:57,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:02:57,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-07 19:02:57,967 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-02-07 19:02:57,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-07 19:02:57,984 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-02-07 19:02:57,985 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-02-07 19:02:57,985 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (45 of 46 remaining) [2024-02-07 19:02:57,985 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (44 of 46 remaining) [2024-02-07 19:02:57,985 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (43 of 46 remaining) [2024-02-07 19:02:57,985 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (42 of 46 remaining) [2024-02-07 19:02:57,985 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (41 of 46 remaining) [2024-02-07 19:02:57,986 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (40 of 46 remaining) [2024-02-07 19:02:57,986 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (39 of 46 remaining) [2024-02-07 19:02:57,986 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONERROR_FUNCTION (38 of 46 remaining) [2024-02-07 19:02:57,986 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONWITNESS_INVARIANT (37 of 46 remaining) [2024-02-07 19:02:57,986 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONWITNESS_INVARIANT (36 of 46 remaining) [2024-02-07 19:02:57,986 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (35 of 46 remaining) [2024-02-07 19:02:57,987 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (34 of 46 remaining) [2024-02-07 19:02:57,987 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (33 of 46 remaining) [2024-02-07 19:02:57,987 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (32 of 46 remaining) [2024-02-07 19:02:57,987 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (31 of 46 remaining) [2024-02-07 19:02:57,987 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (30 of 46 remaining) [2024-02-07 19:02:57,988 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONERROR_FUNCTION (29 of 46 remaining) [2024-02-07 19:02:57,988 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONWITNESS_INVARIANT (28 of 46 remaining) [2024-02-07 19:02:57,988 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONWITNESS_INVARIANT (27 of 46 remaining) [2024-02-07 19:02:57,988 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (26 of 46 remaining) [2024-02-07 19:02:57,988 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (25 of 46 remaining) [2024-02-07 19:02:57,988 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (24 of 46 remaining) [2024-02-07 19:02:57,988 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (23 of 46 remaining) [2024-02-07 19:02:57,989 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (22 of 46 remaining) [2024-02-07 19:02:57,989 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (21 of 46 remaining) [2024-02-07 19:02:57,989 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONERROR_FUNCTION (20 of 46 remaining) [2024-02-07 19:02:57,989 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONWITNESS_INVARIANT (19 of 46 remaining) [2024-02-07 19:02:57,989 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONWITNESS_INVARIANT (18 of 46 remaining) [2024-02-07 19:02:57,989 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (17 of 46 remaining) [2024-02-07 19:02:57,989 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (16 of 46 remaining) [2024-02-07 19:02:57,990 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (15 of 46 remaining) [2024-02-07 19:02:57,990 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (14 of 46 remaining) [2024-02-07 19:02:57,990 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (13 of 46 remaining) [2024-02-07 19:02:57,990 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (12 of 46 remaining) [2024-02-07 19:02:57,990 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONERROR_FUNCTION (11 of 46 remaining) [2024-02-07 19:02:57,990 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONWITNESS_INVARIANT (10 of 46 remaining) [2024-02-07 19:02:57,990 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONWITNESS_INVARIANT (9 of 46 remaining) [2024-02-07 19:02:57,991 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (8 of 46 remaining) [2024-02-07 19:02:57,991 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (7 of 46 remaining) [2024-02-07 19:02:57,991 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (6 of 46 remaining) [2024-02-07 19:02:57,991 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (5 of 46 remaining) [2024-02-07 19:02:57,991 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 46 remaining) [2024-02-07 19:02:57,991 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 46 remaining) [2024-02-07 19:02:57,991 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONERROR_FUNCTION (2 of 46 remaining) [2024-02-07 19:02:57,992 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONWITNESS_INVARIANT (1 of 46 remaining) [2024-02-07 19:02:57,992 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONWITNESS_INVARIANT (0 of 46 remaining) [2024-02-07 19:02:57,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-02-07 19:02:57,992 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2024-02-07 19:02:57,994 WARN L234 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2024-02-07 19:02:57,994 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2024-02-07 19:02:58,017 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-02-07 19:02:58,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 95 places, 84 transitions, 208 flow [2024-02-07 19:02:58,032 INFO L124 PetriNetUnfolderBase]: 0/94 cut-off events. [2024-02-07 19:02:58,033 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2024-02-07 19:02:58,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120 conditions, 94 events. 0/94 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 387 event pairs, 0 based on Foata normal form. 0/43 useless extension candidates. Maximal degree in co-relation 0. Up to 6 conditions per place. [2024-02-07 19:02:58,033 INFO L82 GeneralOperation]: Start removeDead. Operand has 95 places, 84 transitions, 208 flow [2024-02-07 19:02:58,035 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 95 places, 84 transitions, 208 flow [2024-02-07 19:02:58,036 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-07 19:02:58,037 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=false, 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;@4533863d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-07 19:02:58,037 INFO L358 AbstractCegarLoop]: Starting to check reachability of 55 error locations. [2024-02-07 19:02:58,039 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-07 19:02:58,039 INFO L124 PetriNetUnfolderBase]: 0/7 cut-off events. [2024-02-07 19:02:58,039 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-02-07 19:02:58,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:02:58,039 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-02-07 19:02:58,039 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 52 more)] === [2024-02-07 19:02:58,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:02:58,042 INFO L85 PathProgramCache]: Analyzing trace with hash 389465707, now seen corresponding path program 1 times [2024-02-07 19:02:58,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:02:58,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824042344] [2024-02-07 19:02:58,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:02:58,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:02:58,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:02:58,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:02:58,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:02:58,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824042344] [2024-02-07 19:02:58,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824042344] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:02:58,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:02:58,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 19:02:58,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507060383] [2024-02-07 19:02:58,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:02:58,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 19:02:58,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:02:58,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 19:02:58,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 19:02:58,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 84 [2024-02-07 19:02:58,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 84 transitions, 208 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) [2024-02-07 19:02:58,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:02:58,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 84 [2024-02-07 19:02:58,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:03:20,262 INFO L124 PetriNetUnfolderBase]: 285551/392162 cut-off events. [2024-02-07 19:03:20,262 INFO L125 PetriNetUnfolderBase]: For 70120/70120 co-relation queries the response was YES. [2024-02-07 19:03:21,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 780036 conditions, 392162 events. 285551/392162 cut-off events. For 70120/70120 co-relation queries the response was YES. Maximal size of possible extension queue 15087. Compared 3163756 event pairs, 110447 based on Foata normal form. 0/263468 useless extension candidates. Maximal degree in co-relation 81988. Up to 323582 conditions per place. [2024-02-07 19:03:23,458 INFO L140 encePairwiseOnDemand]: 62/84 looper letters, 74 selfloop transitions, 1 changer transitions 0/96 dead transitions. [2024-02-07 19:03:23,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 96 transitions, 414 flow [2024-02-07 19:03:23,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 19:03:23,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 19:03:23,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 172 transitions. [2024-02-07 19:03:23,459 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6825396825396826 [2024-02-07 19:03:23,459 INFO L175 Difference]: Start difference. First operand has 95 places, 84 transitions, 208 flow. Second operand 3 states and 172 transitions. [2024-02-07 19:03:23,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 96 transitions, 414 flow [2024-02-07 19:03:23,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 96 transitions, 390 flow, removed 12 selfloop flow, removed 0 redundant places. [2024-02-07 19:03:23,484 INFO L231 Difference]: Finished difference. Result has 76 places, 63 transitions, 156 flow [2024-02-07 19:03:23,484 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=156, PETRI_PLACES=76, PETRI_TRANSITIONS=63} [2024-02-07 19:03:23,485 INFO L281 CegarLoopForPetriNet]: 95 programPoint places, -19 predicate places. [2024-02-07 19:03:23,485 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 63 transitions, 156 flow [2024-02-07 19:03:23,485 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) [2024-02-07 19:03:23,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:03:23,485 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2024-02-07 19:03:23,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-02-07 19:03:23,486 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 52 more)] === [2024-02-07 19:03:23,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:03:23,486 INFO L85 PathProgramCache]: Analyzing trace with hash 613864765, now seen corresponding path program 1 times [2024-02-07 19:03:23,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:03:23,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514839963] [2024-02-07 19:03:23,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:03:23,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:03:23,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:03:23,516 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-07 19:03:23,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:03:23,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514839963] [2024-02-07 19:03:23,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514839963] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:03:23,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:03:23,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 19:03:23,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251462171] [2024-02-07 19:03:23,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:03:23,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 19:03:23,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:03:23,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 19:03:23,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 19:03:23,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 84 [2024-02-07 19:03:23,526 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 63 transitions, 156 flow. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:03:23,526 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:03:23,526 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 84 [2024-02-07 19:03:23,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand