./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread/fib_safe-11.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/fib_safe-11.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cde23df1 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/fib_safe-11.i ./goblint.2024-05-21_14-57-05.files/protection/fib_safe-11.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 --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-cde23df-m [2024-06-14 11:17:51,765 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-14 11:17:51,851 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-14 11:17:51,854 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-14 11:17:51,857 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-14 11:17:51,886 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-14 11:17:51,886 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-14 11:17:51,887 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-14 11:17:51,887 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-14 11:17:51,890 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-14 11:17:51,890 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-14 11:17:51,891 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-14 11:17:51,891 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-14 11:17:51,891 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-14 11:17:51,892 INFO L153 SettingsManager]: * Use SBE=true [2024-06-14 11:17:51,892 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-14 11:17:51,892 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-14 11:17:51,893 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-14 11:17:51,893 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-14 11:17:51,893 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-14 11:17:51,894 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-14 11:17:51,894 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-14 11:17:51,895 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-14 11:17:51,895 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-14 11:17:51,895 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-14 11:17:51,895 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-14 11:17:51,896 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-14 11:17:51,896 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-14 11:17:51,897 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-14 11:17:51,897 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-14 11:17:51,898 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-14 11:17:51,898 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-14 11:17:51,898 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 11:17:51,899 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-14 11:17:51,899 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-14 11:17:51,899 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-14 11:17:51,899 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-14 11:17:51,900 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-14 11:17:51,900 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-14 11:17:51,900 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-14 11:17:51,900 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-14 11:17:51,901 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-14 11:17:51,901 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-14 11:17:51,901 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-14 11:17:52,143 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-14 11:17:52,173 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-14 11:17:52,175 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-14 11:17:52,176 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-14 11:17:52,177 INFO L274 PluginConnector]: CDTParser initialized [2024-06-14 11:17:52,193 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_safe-11.i [2024-06-14 11:17:53,256 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-14 11:17:53,478 INFO L384 CDTParser]: Found 1 translation units. [2024-06-14 11:17:53,481 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_safe-11.i [2024-06-14 11:17:53,495 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5de5842f4/e444571af987471f967c29ee680a4610/FLAG318cae53c [2024-06-14 11:17:53,512 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5de5842f4/e444571af987471f967c29ee680a4610 [2024-06-14 11:17:53,514 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-14 11:17:53,515 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-14 11:17:53,516 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/fib_safe-11.yml/witness.yml [2024-06-14 11:17:53,626 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-14 11:17:53,627 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-14 11:17:53,628 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-14 11:17:53,628 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-14 11:17:53,632 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-14 11:17:53,632 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 11:17:53" (1/2) ... [2024-06-14 11:17:53,633 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f784b80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:17:53, skipping insertion in model container [2024-06-14 11:17:53,633 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 11:17:53" (1/2) ... [2024-06-14 11:17:53,635 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@151d6338 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:17:53, skipping insertion in model container [2024-06-14 11:17:53,635 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 11:17:53" (2/2) ... [2024-06-14 11:17:53,635 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f784b80 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:17:53, skipping insertion in model container [2024-06-14 11:17:53,636 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 11:17:53" (2/2) ... [2024-06-14 11:17:53,636 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-14 11:17:53,668 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-14 11:17:53,669 INFO L97 edCorrectnessWitness]: Location invariant before [L721-L721] (((((((! multithreaded || 0 <= next) && (! multithreaded || 0 <= q)) && (! multithreaded || 0 <= x)) && (! multithreaded || 0 <= p)) && (! multithreaded || 0 <= prev)) && (! multithreaded || 0 <= cur)) && (! multithreaded || 1 <= j)) && (! multithreaded || 1 <= i) [2024-06-14 11:17:53,669 INFO L97 edCorrectnessWitness]: Location invariant before [L722-L722] (((((((! multithreaded || 0 <= next) && (! multithreaded || 0 <= q)) && (! multithreaded || 0 <= x)) && (! multithreaded || 0 <= p)) && (! multithreaded || 0 <= prev)) && (! multithreaded || 0 <= cur)) && (! multithreaded || 1 <= j)) && (! multithreaded || 1 <= i) [2024-06-14 11:17:53,669 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-14 11:17:53,670 INFO L106 edCorrectnessWitness]: ghost_update [L720-L720] multithreaded = 1; [2024-06-14 11:17:53,705 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-14 11:17:53,992 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 11:17:54,004 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-14 11:17:54,108 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 11:17:54,139 INFO L206 MainTranslator]: Completed translation [2024-06-14 11:17:54,140 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:17:54 WrapperNode [2024-06-14 11:17:54,140 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-14 11:17:54,141 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-14 11:17:54,141 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-14 11:17:54,142 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-14 11:17:54,147 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 14.06 11:17:54" (1/1) ... [2024-06-14 11:17:54,155 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 14.06 11:17:54" (1/1) ... [2024-06-14 11:17:54,174 INFO L138 Inliner]: procedures = 164, calls = 21, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 73 [2024-06-14 11:17:54,175 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-14 11:17:54,176 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-14 11:17:54,176 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-14 11:17:54,176 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-14 11:17:54,184 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:17:54" (1/1) ... [2024-06-14 11:17:54,185 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:17:54" (1/1) ... [2024-06-14 11:17:54,198 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:17:54" (1/1) ... [2024-06-14 11:17:54,216 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-14 11:17:54,216 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:17:54" (1/1) ... [2024-06-14 11:17:54,216 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:17:54" (1/1) ... [2024-06-14 11:17:54,220 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:17:54" (1/1) ... [2024-06-14 11:17:54,228 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:17:54" (1/1) ... [2024-06-14 11:17:54,229 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:17:54" (1/1) ... [2024-06-14 11:17:54,230 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:17:54" (1/1) ... [2024-06-14 11:17:54,240 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-14 11:17:54,241 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-14 11:17:54,241 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-14 11:17:54,242 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-14 11:17:54,242 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:17:54" (1/1) ... [2024-06-14 11:17:54,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 11:17:54,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 11:17:54,268 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-14 11:17:54,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-14 11:17:54,311 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2024-06-14 11:17:54,311 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2024-06-14 11:17:54,311 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2024-06-14 11:17:54,311 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2024-06-14 11:17:54,311 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-14 11:17:54,312 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-14 11:17:54,312 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-14 11:17:54,312 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-14 11:17:54,312 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-14 11:17:54,312 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-14 11:17:54,313 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-14 11:17:54,449 INFO L244 CfgBuilder]: Building ICFG [2024-06-14 11:17:54,450 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-14 11:17:54,645 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-14 11:17:54,645 INFO L293 CfgBuilder]: Performing block encoding [2024-06-14 11:17:54,725 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-14 11:17:54,725 INFO L320 CfgBuilder]: Removed 3 assume(true) statements. [2024-06-14 11:17:54,725 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 11:17:54 BoogieIcfgContainer [2024-06-14 11:17:54,726 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-14 11:17:54,727 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-14 11:17:54,727 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-14 11:17:54,730 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-14 11:17:54,730 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.06 11:17:53" (1/4) ... [2024-06-14 11:17:54,730 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1589f4b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 11:17:54, skipping insertion in model container [2024-06-14 11:17:54,731 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 11:17:53" (2/4) ... [2024-06-14 11:17:54,731 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1589f4b2 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 11:17:54, skipping insertion in model container [2024-06-14 11:17:54,731 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:17:54" (3/4) ... [2024-06-14 11:17:54,731 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1589f4b2 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 11:17:54, skipping insertion in model container [2024-06-14 11:17:54,731 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 11:17:54" (4/4) ... [2024-06-14 11:17:54,732 INFO L112 eAbstractionObserver]: Analyzing ICFG fib_safe-11.i [2024-06-14 11:17:54,746 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-14 11:17:54,747 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-06-14 11:17:54,747 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-14 11:17:54,771 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-14 11:17:54,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 33 places, 29 transitions, 66 flow [2024-06-14 11:17:54,841 INFO L124 PetriNetUnfolderBase]: 3/27 cut-off events. [2024-06-14 11:17:54,841 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 11:17:54,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34 conditions, 27 events. 3/27 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 29 event pairs, 0 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 23. Up to 2 conditions per place. [2024-06-14 11:17:54,845 INFO L82 GeneralOperation]: Start removeDead. Operand has 33 places, 29 transitions, 66 flow [2024-06-14 11:17:54,847 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 31 places, 27 transitions, 60 flow [2024-06-14 11:17:54,866 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-14 11:17:54,873 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;@5d54f514, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-14 11:17:54,874 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-06-14 11:17:54,880 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-14 11:17:54,881 INFO L124 PetriNetUnfolderBase]: 0/10 cut-off events. [2024-06-14 11:17:54,881 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 11:17:54,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:17:54,882 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:17:54,882 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 11:17:54,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:17:54,889 INFO L85 PathProgramCache]: Analyzing trace with hash 259354094, now seen corresponding path program 1 times [2024-06-14 11:17:54,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:17:54,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970177126] [2024-06-14 11:17:54,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:17:54,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:17:54,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:17:55,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:17:55,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:17:55,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970177126] [2024-06-14 11:17:55,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970177126] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:17:55,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:17:55,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 11:17:55,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2696966] [2024-06-14 11:17:55,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:17:55,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 11:17:55,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:17:55,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 11:17:55,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 11:17:55,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-14 11:17:55,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 27 transitions, 60 flow. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:17:55,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:17:55,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-14 11:17:55,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:17:55,660 INFO L124 PetriNetUnfolderBase]: 322/536 cut-off events. [2024-06-14 11:17:55,661 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-06-14 11:17:55,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1052 conditions, 536 events. 322/536 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2114 event pairs, 53 based on Foata normal form. 21/506 useless extension candidates. Maximal degree in co-relation 1034. Up to 295 conditions per place. [2024-06-14 11:17:55,664 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 34 selfloop transitions, 8 changer transitions 12/56 dead transitions. [2024-06-14 11:17:55,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 56 transitions, 227 flow [2024-06-14 11:17:55,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:17:55,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:17:55,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 85 transitions. [2024-06-14 11:17:55,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5862068965517241 [2024-06-14 11:17:55,677 INFO L175 Difference]: Start difference. First operand has 31 places, 27 transitions, 60 flow. Second operand 5 states and 85 transitions. [2024-06-14 11:17:55,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 56 transitions, 227 flow [2024-06-14 11:17:55,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 56 transitions, 224 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-14 11:17:55,681 INFO L231 Difference]: Finished difference. Result has 36 places, 27 transitions, 103 flow [2024-06-14 11:17:55,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=103, PETRI_PLACES=36, PETRI_TRANSITIONS=27} [2024-06-14 11:17:55,685 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 5 predicate places. [2024-06-14 11:17:55,686 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 27 transitions, 103 flow [2024-06-14 11:17:55,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:17:55,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:17:55,686 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:17:55,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-14 11:17:55,687 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 11:17:55,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:17:55,687 INFO L85 PathProgramCache]: Analyzing trace with hash -227696702, now seen corresponding path program 1 times [2024-06-14 11:17:55,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:17:55,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305278650] [2024-06-14 11:17:55,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:17:55,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:17:55,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:17:55,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:17:55,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:17:55,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305278650] [2024-06-14 11:17:55,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305278650] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:17:55,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:17:55,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:17:55,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959029203] [2024-06-14 11:17:55,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:17:55,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:17:55,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:17:55,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:17:55,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:17:55,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-14 11:17:55,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 27 transitions, 103 flow. Second operand has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:17:55,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:17:55,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-14 11:17:55,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:17:56,048 INFO L124 PetriNetUnfolderBase]: 160/298 cut-off events. [2024-06-14 11:17:56,049 INFO L125 PetriNetUnfolderBase]: For 116/116 co-relation queries the response was YES. [2024-06-14 11:17:56,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 787 conditions, 298 events. 160/298 cut-off events. For 116/116 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1094 event pairs, 13 based on Foata normal form. 10/308 useless extension candidates. Maximal degree in co-relation 762. Up to 115 conditions per place. [2024-06-14 11:17:56,054 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 42 selfloop transitions, 12 changer transitions 0/56 dead transitions. [2024-06-14 11:17:56,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 56 transitions, 291 flow [2024-06-14 11:17:56,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:17:56,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:17:56,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 92 transitions. [2024-06-14 11:17:56,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45320197044334976 [2024-06-14 11:17:56,059 INFO L175 Difference]: Start difference. First operand has 36 places, 27 transitions, 103 flow. Second operand 7 states and 92 transitions. [2024-06-14 11:17:56,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 56 transitions, 291 flow [2024-06-14 11:17:56,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 56 transitions, 291 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-06-14 11:17:56,066 INFO L231 Difference]: Finished difference. Result has 41 places, 31 transitions, 162 flow [2024-06-14 11:17:56,066 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=103, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=162, PETRI_PLACES=41, PETRI_TRANSITIONS=31} [2024-06-14 11:17:56,067 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 10 predicate places. [2024-06-14 11:17:56,068 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 31 transitions, 162 flow [2024-06-14 11:17:56,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:17:56,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:17:56,069 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:17:56,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-14 11:17:56,069 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 11:17:56,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:17:56,073 INFO L85 PathProgramCache]: Analyzing trace with hash 1531337612, now seen corresponding path program 1 times [2024-06-14 11:17:56,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:17:56,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401123562] [2024-06-14 11:17:56,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:17:56,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:17:56,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:17:56,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:17:56,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:17:56,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401123562] [2024-06-14 11:17:56,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401123562] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:17:56,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:17:56,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:17:56,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206493106] [2024-06-14 11:17:56,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:17:56,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:17:56,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:17:56,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:17:56,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:17:56,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-14 11:17:56,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 31 transitions, 162 flow. Second operand has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:17:56,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:17:56,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-14 11:17:56,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:17:56,492 INFO L124 PetriNetUnfolderBase]: 145/273 cut-off events. [2024-06-14 11:17:56,492 INFO L125 PetriNetUnfolderBase]: For 304/308 co-relation queries the response was YES. [2024-06-14 11:17:56,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 891 conditions, 273 events. 145/273 cut-off events. For 304/308 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 967 event pairs, 4 based on Foata normal form. 13/286 useless extension candidates. Maximal degree in co-relation 859. Up to 115 conditions per place. [2024-06-14 11:17:56,494 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 44 selfloop transitions, 13 changer transitions 0/59 dead transitions. [2024-06-14 11:17:56,494 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 59 transitions, 366 flow [2024-06-14 11:17:56,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:17:56,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:17:56,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 99 transitions. [2024-06-14 11:17:56,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4267241379310345 [2024-06-14 11:17:56,499 INFO L175 Difference]: Start difference. First operand has 41 places, 31 transitions, 162 flow. Second operand 8 states and 99 transitions. [2024-06-14 11:17:56,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 59 transitions, 366 flow [2024-06-14 11:17:56,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 59 transitions, 346 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-14 11:17:56,503 INFO L231 Difference]: Finished difference. Result has 44 places, 31 transitions, 174 flow [2024-06-14 11:17:56,503 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=174, PETRI_PLACES=44, PETRI_TRANSITIONS=31} [2024-06-14 11:17:56,504 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 13 predicate places. [2024-06-14 11:17:56,504 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 31 transitions, 174 flow [2024-06-14 11:17:56,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:17:56,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:17:56,505 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:17:56,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-14 11:17:56,505 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 11:17:56,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:17:56,506 INFO L85 PathProgramCache]: Analyzing trace with hash 58741636, now seen corresponding path program 1 times [2024-06-14 11:17:56,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:17:56,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910738446] [2024-06-14 11:17:56,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:17:56,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:17:56,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:17:56,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:17:56,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:17:56,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910738446] [2024-06-14 11:17:56,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910738446] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:17:56,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:17:56,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:17:56,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598430592] [2024-06-14 11:17:56,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:17:56,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:17:56,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:17:56,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:17:56,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:17:56,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-14 11:17:56,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 31 transitions, 174 flow. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:17:56,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:17:56,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-14 11:17:56,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:17:56,864 INFO L124 PetriNetUnfolderBase]: 169/315 cut-off events. [2024-06-14 11:17:56,865 INFO L125 PetriNetUnfolderBase]: For 449/449 co-relation queries the response was YES. [2024-06-14 11:17:56,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1087 conditions, 315 events. 169/315 cut-off events. For 449/449 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1131 event pairs, 37 based on Foata normal form. 3/317 useless extension candidates. Maximal degree in co-relation 1054. Up to 179 conditions per place. [2024-06-14 11:17:56,867 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 36 selfloop transitions, 11 changer transitions 0/49 dead transitions. [2024-06-14 11:17:56,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 49 transitions, 348 flow [2024-06-14 11:17:56,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:17:56,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:17:56,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 78 transitions. [2024-06-14 11:17:56,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3842364532019704 [2024-06-14 11:17:56,869 INFO L175 Difference]: Start difference. First operand has 44 places, 31 transitions, 174 flow. Second operand 7 states and 78 transitions. [2024-06-14 11:17:56,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 49 transitions, 348 flow [2024-06-14 11:17:56,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 49 transitions, 320 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-14 11:17:56,873 INFO L231 Difference]: Finished difference. Result has 47 places, 34 transitions, 205 flow [2024-06-14 11:17:56,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=205, PETRI_PLACES=47, PETRI_TRANSITIONS=34} [2024-06-14 11:17:56,874 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 16 predicate places. [2024-06-14 11:17:56,874 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 34 transitions, 205 flow [2024-06-14 11:17:56,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:17:56,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:17:56,875 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:17:56,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-14 11:17:56,886 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 11:17:56,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:17:56,888 INFO L85 PathProgramCache]: Analyzing trace with hash 1820991533, now seen corresponding path program 1 times [2024-06-14 11:17:56,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:17:56,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940449129] [2024-06-14 11:17:56,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:17:56,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:17:56,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:17:57,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:17:57,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:17:57,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940449129] [2024-06-14 11:17:57,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940449129] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:17:57,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:17:57,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:17:57,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42259411] [2024-06-14 11:17:57,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:17:57,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:17:57,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:17:57,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:17:57,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:17:57,161 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-14 11:17:57,161 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 34 transitions, 205 flow. Second operand has 8 states, 8 states have (on average 6.75) internal successors, (54), 8 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) [2024-06-14 11:17:57,161 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:17:57,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-14 11:17:57,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:17:57,243 INFO L124 PetriNetUnfolderBase]: 151/289 cut-off events. [2024-06-14 11:17:57,244 INFO L125 PetriNetUnfolderBase]: For 507/507 co-relation queries the response was YES. [2024-06-14 11:17:57,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1028 conditions, 289 events. 151/289 cut-off events. For 507/507 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 996 event pairs, 31 based on Foata normal form. 9/297 useless extension candidates. Maximal degree in co-relation 991. Up to 176 conditions per place. [2024-06-14 11:17:57,246 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 33 selfloop transitions, 11 changer transitions 2/48 dead transitions. [2024-06-14 11:17:57,246 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 48 transitions, 349 flow [2024-06-14 11:17:57,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:17:57,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:17:57,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 82 transitions. [2024-06-14 11:17:57,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35344827586206895 [2024-06-14 11:17:57,248 INFO L175 Difference]: Start difference. First operand has 47 places, 34 transitions, 205 flow. Second operand 8 states and 82 transitions. [2024-06-14 11:17:57,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 48 transitions, 349 flow [2024-06-14 11:17:57,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 48 transitions, 336 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-14 11:17:57,251 INFO L231 Difference]: Finished difference. Result has 52 places, 34 transitions, 218 flow [2024-06-14 11:17:57,252 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=218, PETRI_PLACES=52, PETRI_TRANSITIONS=34} [2024-06-14 11:17:57,255 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 21 predicate places. [2024-06-14 11:17:57,256 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 34 transitions, 218 flow [2024-06-14 11:17:57,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 8 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) [2024-06-14 11:17:57,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:17:57,256 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:17:57,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-14 11:17:57,260 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 11:17:57,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:17:57,260 INFO L85 PathProgramCache]: Analyzing trace with hash -124043924, now seen corresponding path program 1 times [2024-06-14 11:17:57,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:17:57,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053807140] [2024-06-14 11:17:57,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:17:57,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:17:57,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:17:57,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:17:57,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:17:57,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053807140] [2024-06-14 11:17:57,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053807140] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:17:57,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:17:57,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:17:57,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729481621] [2024-06-14 11:17:57,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:17:57,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:17:57,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:17:57,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:17:57,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:17:57,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-14 11:17:57,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 34 transitions, 218 flow. Second operand has 9 states, 9 states have (on average 6.666666666666667) internal successors, (60), 9 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:17:57,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:17:57,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-14 11:17:57,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:17:57,619 INFO L124 PetriNetUnfolderBase]: 157/300 cut-off events. [2024-06-14 11:17:57,619 INFO L125 PetriNetUnfolderBase]: For 637/641 co-relation queries the response was YES. [2024-06-14 11:17:57,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1093 conditions, 300 events. 157/300 cut-off events. For 637/641 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1062 event pairs, 31 based on Foata normal form. 5/305 useless extension candidates. Maximal degree in co-relation 1054. Up to 168 conditions per place. [2024-06-14 11:17:57,621 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 39 selfloop transitions, 17 changer transitions 1/59 dead transitions. [2024-06-14 11:17:57,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 59 transitions, 421 flow [2024-06-14 11:17:57,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:17:57,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:17:57,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 98 transitions. [2024-06-14 11:17:57,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37547892720306514 [2024-06-14 11:17:57,636 INFO L175 Difference]: Start difference. First operand has 52 places, 34 transitions, 218 flow. Second operand 9 states and 98 transitions. [2024-06-14 11:17:57,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 59 transitions, 421 flow [2024-06-14 11:17:57,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 59 transitions, 393 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-14 11:17:57,639 INFO L231 Difference]: Finished difference. Result has 55 places, 39 transitions, 266 flow [2024-06-14 11:17:57,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=266, PETRI_PLACES=55, PETRI_TRANSITIONS=39} [2024-06-14 11:17:57,639 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 24 predicate places. [2024-06-14 11:17:57,640 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 39 transitions, 266 flow [2024-06-14 11:17:57,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.666666666666667) internal successors, (60), 9 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:17:57,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:17:57,640 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:17:57,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-14 11:17:57,640 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 11:17:57,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:17:57,641 INFO L85 PathProgramCache]: Analyzing trace with hash 1747540272, now seen corresponding path program 2 times [2024-06-14 11:17:57,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:17:57,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788747292] [2024-06-14 11:17:57,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:17:57,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:17:57,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:17:57,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:17:57,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:17:57,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788747292] [2024-06-14 11:17:57,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788747292] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:17:57,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:17:57,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:17:57,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626355003] [2024-06-14 11:17:57,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:17:57,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:17:57,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:17:57,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:17:57,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:17:57,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-14 11:17:57,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 39 transitions, 266 flow. Second operand has 9 states, 9 states have (on average 6.666666666666667) internal successors, (60), 9 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:17:57,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:17:57,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-14 11:17:57,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:17:58,049 INFO L124 PetriNetUnfolderBase]: 166/314 cut-off events. [2024-06-14 11:17:58,049 INFO L125 PetriNetUnfolderBase]: For 782/782 co-relation queries the response was YES. [2024-06-14 11:17:58,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1236 conditions, 314 events. 166/314 cut-off events. For 782/782 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1125 event pairs, 34 based on Foata normal form. 3/316 useless extension candidates. Maximal degree in co-relation 1196. Up to 192 conditions per place. [2024-06-14 11:17:58,052 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 39 selfloop transitions, 17 changer transitions 1/59 dead transitions. [2024-06-14 11:17:58,052 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 59 transitions, 484 flow [2024-06-14 11:17:58,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:17:58,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:17:58,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 92 transitions. [2024-06-14 11:17:58,053 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3524904214559387 [2024-06-14 11:17:58,053 INFO L175 Difference]: Start difference. First operand has 55 places, 39 transitions, 266 flow. Second operand 9 states and 92 transitions. [2024-06-14 11:17:58,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 59 transitions, 484 flow [2024-06-14 11:17:58,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 59 transitions, 443 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-14 11:17:58,057 INFO L231 Difference]: Finished difference. Result has 60 places, 46 transitions, 344 flow [2024-06-14 11:17:58,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=233, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=344, PETRI_PLACES=60, PETRI_TRANSITIONS=46} [2024-06-14 11:17:58,058 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 29 predicate places. [2024-06-14 11:17:58,058 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 46 transitions, 344 flow [2024-06-14 11:17:58,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.666666666666667) internal successors, (60), 9 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:17:58,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:17:58,058 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:17:58,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-14 11:17:58,059 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 11:17:58,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:17:58,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1553674328, now seen corresponding path program 3 times [2024-06-14 11:17:58,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:17:58,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255292417] [2024-06-14 11:17:58,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:17:58,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:17:58,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:17:58,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:17:58,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:17:58,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255292417] [2024-06-14 11:17:58,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255292417] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:17:58,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:17:58,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:17:58,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975845029] [2024-06-14 11:17:58,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:17:58,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:17:58,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:17:58,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:17:58,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:17:58,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-14 11:17:58,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 46 transitions, 344 flow. Second operand has 9 states, 9 states have (on average 6.666666666666667) internal successors, (60), 9 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:17:58,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:17:58,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-14 11:17:58,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:17:58,447 INFO L124 PetriNetUnfolderBase]: 172/327 cut-off events. [2024-06-14 11:17:58,447 INFO L125 PetriNetUnfolderBase]: For 940/940 co-relation queries the response was YES. [2024-06-14 11:17:58,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1368 conditions, 327 events. 172/327 cut-off events. For 940/940 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1195 event pairs, 31 based on Foata normal form. 1/328 useless extension candidates. Maximal degree in co-relation 1325. Up to 199 conditions per place. [2024-06-14 11:17:58,450 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 45 selfloop transitions, 19 changer transitions 1/67 dead transitions. [2024-06-14 11:17:58,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 67 transitions, 564 flow [2024-06-14 11:17:58,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:17:58,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:17:58,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 94 transitions. [2024-06-14 11:17:58,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36015325670498083 [2024-06-14 11:17:58,452 INFO L175 Difference]: Start difference. First operand has 60 places, 46 transitions, 344 flow. Second operand 9 states and 94 transitions. [2024-06-14 11:17:58,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 67 transitions, 564 flow [2024-06-14 11:17:58,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 67 transitions, 537 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-14 11:17:58,458 INFO L231 Difference]: Finished difference. Result has 67 places, 51 transitions, 417 flow [2024-06-14 11:17:58,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=319, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=417, PETRI_PLACES=67, PETRI_TRANSITIONS=51} [2024-06-14 11:17:58,460 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 36 predicate places. [2024-06-14 11:17:58,460 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 51 transitions, 417 flow [2024-06-14 11:17:58,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.666666666666667) internal successors, (60), 9 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:17:58,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:17:58,460 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:17:58,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-14 11:17:58,461 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 11:17:58,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:17:58,461 INFO L85 PathProgramCache]: Analyzing trace with hash 1748134918, now seen corresponding path program 4 times [2024-06-14 11:17:58,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:17:58,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813161093] [2024-06-14 11:17:58,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:17:58,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:17:58,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:17:58,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:17:58,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:17:58,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813161093] [2024-06-14 11:17:58,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813161093] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:17:58,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:17:58,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:17:58,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127413872] [2024-06-14 11:17:58,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:17:58,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:17:58,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:17:58,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:17:58,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:17:58,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-14 11:17:58,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 51 transitions, 417 flow. Second operand has 9 states, 9 states have (on average 6.666666666666667) internal successors, (60), 9 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:17:58,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:17:58,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-14 11:17:58,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:17:58,800 INFO L124 PetriNetUnfolderBase]: 178/339 cut-off events. [2024-06-14 11:17:58,800 INFO L125 PetriNetUnfolderBase]: For 1234/1238 co-relation queries the response was YES. [2024-06-14 11:17:58,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1511 conditions, 339 events. 178/339 cut-off events. For 1234/1238 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1280 event pairs, 29 based on Foata normal form. 7/346 useless extension candidates. Maximal degree in co-relation 1464. Up to 209 conditions per place. [2024-06-14 11:17:58,803 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 49 selfloop transitions, 19 changer transitions 1/71 dead transitions. [2024-06-14 11:17:58,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 71 transitions, 649 flow [2024-06-14 11:17:58,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:17:58,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:17:58,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 95 transitions. [2024-06-14 11:17:58,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36398467432950193 [2024-06-14 11:17:58,805 INFO L175 Difference]: Start difference. First operand has 67 places, 51 transitions, 417 flow. Second operand 9 states and 95 transitions. [2024-06-14 11:17:58,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 71 transitions, 649 flow [2024-06-14 11:17:58,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 71 transitions, 607 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-14 11:17:58,809 INFO L231 Difference]: Finished difference. Result has 72 places, 55 transitions, 471 flow [2024-06-14 11:17:58,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=377, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=471, PETRI_PLACES=72, PETRI_TRANSITIONS=55} [2024-06-14 11:17:58,810 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 41 predicate places. [2024-06-14 11:17:58,810 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 55 transitions, 471 flow [2024-06-14 11:17:58,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.666666666666667) internal successors, (60), 9 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:17:58,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:17:58,811 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:17:58,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-14 11:17:58,811 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 11:17:58,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:17:58,811 INFO L85 PathProgramCache]: Analyzing trace with hash 1742778672, now seen corresponding path program 5 times [2024-06-14 11:17:58,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:17:58,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205107846] [2024-06-14 11:17:58,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:17:58,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:17:58,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:17:59,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:17:59,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:17:59,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205107846] [2024-06-14 11:17:59,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205107846] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:17:59,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:17:59,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:17:59,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654457512] [2024-06-14 11:17:59,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:17:59,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:17:59,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:17:59,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:17:59,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:17:59,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-14 11:17:59,062 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 55 transitions, 471 flow. Second operand has 9 states, 9 states have (on average 6.666666666666667) internal successors, (60), 9 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:17:59,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:17:59,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-14 11:17:59,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:17:59,173 INFO L124 PetriNetUnfolderBase]: 181/340 cut-off events. [2024-06-14 11:17:59,173 INFO L125 PetriNetUnfolderBase]: For 1490/1490 co-relation queries the response was YES. [2024-06-14 11:17:59,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1616 conditions, 340 events. 181/340 cut-off events. For 1490/1490 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1269 event pairs, 32 based on Foata normal form. 1/340 useless extension candidates. Maximal degree in co-relation 1567. Up to 211 conditions per place. [2024-06-14 11:17:59,176 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 48 selfloop transitions, 20 changer transitions 1/71 dead transitions. [2024-06-14 11:17:59,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 71 transitions, 689 flow [2024-06-14 11:17:59,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:17:59,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:17:59,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 91 transitions. [2024-06-14 11:17:59,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3486590038314176 [2024-06-14 11:17:59,178 INFO L175 Difference]: Start difference. First operand has 72 places, 55 transitions, 471 flow. Second operand 9 states and 91 transitions. [2024-06-14 11:17:59,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 71 transitions, 689 flow [2024-06-14 11:17:59,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 71 transitions, 649 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-14 11:17:59,182 INFO L231 Difference]: Finished difference. Result has 77 places, 58 transitions, 519 flow [2024-06-14 11:17:59,183 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=431, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=519, PETRI_PLACES=77, PETRI_TRANSITIONS=58} [2024-06-14 11:17:59,183 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 46 predicate places. [2024-06-14 11:17:59,185 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 58 transitions, 519 flow [2024-06-14 11:17:59,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.666666666666667) internal successors, (60), 9 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:17:59,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:17:59,185 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:17:59,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-14 11:17:59,186 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 11:17:59,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:17:59,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1920923892, now seen corresponding path program 6 times [2024-06-14 11:17:59,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:17:59,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909353213] [2024-06-14 11:17:59,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:17:59,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:17:59,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:17:59,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:17:59,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:17:59,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909353213] [2024-06-14 11:17:59,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909353213] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:17:59,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:17:59,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:17:59,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671530812] [2024-06-14 11:17:59,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:17:59,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:17:59,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:17:59,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:17:59,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:17:59,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-14 11:17:59,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 58 transitions, 519 flow. Second operand has 9 states, 9 states have (on average 6.666666666666667) internal successors, (60), 9 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:17:59,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:17:59,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-14 11:17:59,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:17:59,519 INFO L124 PetriNetUnfolderBase]: 181/340 cut-off events. [2024-06-14 11:17:59,519 INFO L125 PetriNetUnfolderBase]: For 1718/1718 co-relation queries the response was YES. [2024-06-14 11:17:59,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1673 conditions, 340 events. 181/340 cut-off events. For 1718/1718 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1273 event pairs, 35 based on Foata normal form. 3/342 useless extension candidates. Maximal degree in co-relation 1621. Up to 219 conditions per place. [2024-06-14 11:17:59,522 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 50 selfloop transitions, 22 changer transitions 1/75 dead transitions. [2024-06-14 11:17:59,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 75 transitions, 757 flow [2024-06-14 11:17:59,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:17:59,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:17:59,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 93 transitions. [2024-06-14 11:17:59,523 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3563218390804598 [2024-06-14 11:17:59,524 INFO L175 Difference]: Start difference. First operand has 77 places, 58 transitions, 519 flow. Second operand 9 states and 93 transitions. [2024-06-14 11:17:59,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 75 transitions, 757 flow [2024-06-14 11:17:59,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 75 transitions, 701 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-14 11:17:59,528 INFO L231 Difference]: Finished difference. Result has 82 places, 62 transitions, 578 flow [2024-06-14 11:17:59,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=463, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=578, PETRI_PLACES=82, PETRI_TRANSITIONS=62} [2024-06-14 11:17:59,529 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 51 predicate places. [2024-06-14 11:17:59,529 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 62 transitions, 578 flow [2024-06-14 11:17:59,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.666666666666667) internal successors, (60), 9 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:17:59,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:17:59,530 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:17:59,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-14 11:17:59,530 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 11:17:59,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:17:59,530 INFO L85 PathProgramCache]: Analyzing trace with hash -1820825740, now seen corresponding path program 1 times [2024-06-14 11:17:59,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:17:59,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882542684] [2024-06-14 11:17:59,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:17:59,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:17:59,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:17:59,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:17:59,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:17:59,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882542684] [2024-06-14 11:17:59,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882542684] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:17:59,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:17:59,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:17:59,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379626721] [2024-06-14 11:17:59,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:17:59,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:17:59,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:17:59,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:17:59,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:17:59,767 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-14 11:17:59,768 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 62 transitions, 578 flow. Second operand has 10 states, 10 states have (on average 6.6) internal successors, (66), 10 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:17:59,768 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:17:59,768 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-14 11:17:59,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:17:59,914 INFO L124 PetriNetUnfolderBase]: 199/376 cut-off events. [2024-06-14 11:17:59,914 INFO L125 PetriNetUnfolderBase]: For 2368/2372 co-relation queries the response was YES. [2024-06-14 11:17:59,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1947 conditions, 376 events. 199/376 cut-off events. For 2368/2372 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1475 event pairs, 11 based on Foata normal form. 7/383 useless extension candidates. Maximal degree in co-relation 1892. Up to 157 conditions per place. [2024-06-14 11:17:59,917 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 64 selfloop transitions, 26 changer transitions 1/93 dead transitions. [2024-06-14 11:17:59,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 93 transitions, 954 flow [2024-06-14 11:17:59,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:17:59,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:17:59,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 112 transitions. [2024-06-14 11:17:59,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38620689655172413 [2024-06-14 11:17:59,918 INFO L175 Difference]: Start difference. First operand has 82 places, 62 transitions, 578 flow. Second operand 10 states and 112 transitions. [2024-06-14 11:17:59,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 93 transitions, 954 flow [2024-06-14 11:17:59,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 93 transitions, 871 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-14 11:17:59,924 INFO L231 Difference]: Finished difference. Result has 84 places, 64 transitions, 579 flow [2024-06-14 11:17:59,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=495, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=579, PETRI_PLACES=84, PETRI_TRANSITIONS=64} [2024-06-14 11:17:59,925 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 53 predicate places. [2024-06-14 11:17:59,925 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 64 transitions, 579 flow [2024-06-14 11:17:59,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.6) internal successors, (66), 10 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:17:59,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:17:59,925 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:17:59,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-14 11:17:59,926 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 11:17:59,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:17:59,926 INFO L85 PathProgramCache]: Analyzing trace with hash -986004792, now seen corresponding path program 2 times [2024-06-14 11:17:59,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:17:59,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404448120] [2024-06-14 11:17:59,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:17:59,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:17:59,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:18:00,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:18:00,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:18:00,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404448120] [2024-06-14 11:18:00,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404448120] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:18:00,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:18:00,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:18:00,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145228613] [2024-06-14 11:18:00,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:18:00,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:18:00,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:18:00,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:18:00,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:18:00,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-14 11:18:00,157 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 64 transitions, 579 flow. Second operand has 10 states, 10 states have (on average 6.6) internal successors, (66), 10 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:18:00,157 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:18:00,157 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-14 11:18:00,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:18:00,283 INFO L124 PetriNetUnfolderBase]: 217/410 cut-off events. [2024-06-14 11:18:00,283 INFO L125 PetriNetUnfolderBase]: For 2951/2955 co-relation queries the response was YES. [2024-06-14 11:18:00,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2171 conditions, 410 events. 217/410 cut-off events. For 2951/2955 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 1684 event pairs, 30 based on Foata normal form. 7/417 useless extension candidates. Maximal degree in co-relation 2117. Up to 238 conditions per place. [2024-06-14 11:18:00,286 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 64 selfloop transitions, 25 changer transitions 1/92 dead transitions. [2024-06-14 11:18:00,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 92 transitions, 923 flow [2024-06-14 11:18:00,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:18:00,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:18:00,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 110 transitions. [2024-06-14 11:18:00,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3793103448275862 [2024-06-14 11:18:00,289 INFO L175 Difference]: Start difference. First operand has 84 places, 64 transitions, 579 flow. Second operand 10 states and 110 transitions. [2024-06-14 11:18:00,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 92 transitions, 923 flow [2024-06-14 11:18:00,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 92 transitions, 856 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-14 11:18:00,300 INFO L231 Difference]: Finished difference. Result has 86 places, 66 transitions, 602 flow [2024-06-14 11:18:00,300 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=514, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=602, PETRI_PLACES=86, PETRI_TRANSITIONS=66} [2024-06-14 11:18:00,301 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 55 predicate places. [2024-06-14 11:18:00,301 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 66 transitions, 602 flow [2024-06-14 11:18:00,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.6) internal successors, (66), 10 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:18:00,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:18:00,301 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:18:00,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-14 11:18:00,302 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 11:18:00,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:18:00,302 INFO L85 PathProgramCache]: Analyzing trace with hash -985943412, now seen corresponding path program 3 times [2024-06-14 11:18:00,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:18:00,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213004519] [2024-06-14 11:18:00,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:18:00,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:18:00,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:18:00,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:18:00,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:18:00,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213004519] [2024-06-14 11:18:00,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213004519] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:18:00,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:18:00,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:18:00,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859268961] [2024-06-14 11:18:00,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:18:00,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:18:00,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:18:00,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:18:00,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:18:00,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-14 11:18:00,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 66 transitions, 602 flow. Second operand has 10 states, 10 states have (on average 6.6) internal successors, (66), 10 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:18:00,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:18:00,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-14 11:18:00,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:18:00,669 INFO L124 PetriNetUnfolderBase]: 226/425 cut-off events. [2024-06-14 11:18:00,669 INFO L125 PetriNetUnfolderBase]: For 3312/3316 co-relation queries the response was YES. [2024-06-14 11:18:00,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2288 conditions, 425 events. 226/425 cut-off events. For 3312/3316 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 1747 event pairs, 38 based on Foata normal form. 7/432 useless extension candidates. Maximal degree in co-relation 2234. Up to 265 conditions per place. [2024-06-14 11:18:00,672 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 61 selfloop transitions, 26 changer transitions 1/90 dead transitions. [2024-06-14 11:18:00,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 90 transitions, 899 flow [2024-06-14 11:18:00,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:18:00,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:18:00,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 108 transitions. [2024-06-14 11:18:00,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3724137931034483 [2024-06-14 11:18:00,674 INFO L175 Difference]: Start difference. First operand has 86 places, 66 transitions, 602 flow. Second operand 10 states and 108 transitions. [2024-06-14 11:18:00,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 90 transitions, 899 flow [2024-06-14 11:18:00,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 90 transitions, 851 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-14 11:18:00,681 INFO L231 Difference]: Finished difference. Result has 89 places, 67 transitions, 633 flow [2024-06-14 11:18:00,681 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=554, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=633, PETRI_PLACES=89, PETRI_TRANSITIONS=67} [2024-06-14 11:18:00,682 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 58 predicate places. [2024-06-14 11:18:00,682 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 67 transitions, 633 flow [2024-06-14 11:18:00,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.6) internal successors, (66), 10 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:18:00,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:18:00,682 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:18:00,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-14 11:18:00,683 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 11:18:00,683 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:18:00,683 INFO L85 PathProgramCache]: Analyzing trace with hash -985943257, now seen corresponding path program 1 times [2024-06-14 11:18:00,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:18:00,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122708325] [2024-06-14 11:18:00,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:18:00,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:18:00,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:18:00,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:18:00,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:18:00,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122708325] [2024-06-14 11:18:00,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122708325] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:18:00,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:18:00,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:18:00,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805479894] [2024-06-14 11:18:00,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:18:00,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:18:00,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:18:00,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:18:00,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:18:00,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-14 11:18:00,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 67 transitions, 633 flow. Second operand has 10 states, 10 states have (on average 6.6) internal successors, (66), 10 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:18:00,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:18:00,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-14 11:18:00,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:18:01,049 INFO L124 PetriNetUnfolderBase]: 235/444 cut-off events. [2024-06-14 11:18:01,050 INFO L125 PetriNetUnfolderBase]: For 3834/3838 co-relation queries the response was YES. [2024-06-14 11:18:01,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2404 conditions, 444 events. 235/444 cut-off events. For 3834/3838 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 1876 event pairs, 34 based on Foata normal form. 7/451 useless extension candidates. Maximal degree in co-relation 2349. Up to 280 conditions per place. [2024-06-14 11:18:01,053 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 62 selfloop transitions, 26 changer transitions 1/91 dead transitions. [2024-06-14 11:18:01,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 91 transitions, 911 flow [2024-06-14 11:18:01,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:18:01,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:18:01,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 108 transitions. [2024-06-14 11:18:01,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3724137931034483 [2024-06-14 11:18:01,055 INFO L175 Difference]: Start difference. First operand has 89 places, 67 transitions, 633 flow. Second operand 10 states and 108 transitions. [2024-06-14 11:18:01,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 91 transitions, 911 flow [2024-06-14 11:18:01,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 91 transitions, 857 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-14 11:18:01,067 INFO L231 Difference]: Finished difference. Result has 91 places, 68 transitions, 653 flow [2024-06-14 11:18:01,068 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=579, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=653, PETRI_PLACES=91, PETRI_TRANSITIONS=68} [2024-06-14 11:18:01,069 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 60 predicate places. [2024-06-14 11:18:01,069 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 68 transitions, 653 flow [2024-06-14 11:18:01,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.6) internal successors, (66), 10 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:18:01,070 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:18:01,070 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:18:01,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-14 11:18:01,071 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 11:18:01,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:18:01,071 INFO L85 PathProgramCache]: Analyzing trace with hash -1648791833, now seen corresponding path program 2 times [2024-06-14 11:18:01,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:18:01,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630806551] [2024-06-14 11:18:01,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:18:01,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:18:01,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:18:01,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:18:01,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:18:01,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630806551] [2024-06-14 11:18:01,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630806551] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:18:01,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:18:01,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:18:01,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766541971] [2024-06-14 11:18:01,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:18:01,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:18:01,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:18:01,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:18:01,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:18:01,318 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-14 11:18:01,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 68 transitions, 653 flow. Second operand has 10 states, 10 states have (on average 6.6) internal successors, (66), 10 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:18:01,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:18:01,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-14 11:18:01,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:18:01,468 INFO L124 PetriNetUnfolderBase]: 244/459 cut-off events. [2024-06-14 11:18:01,468 INFO L125 PetriNetUnfolderBase]: For 4098/4098 co-relation queries the response was YES. [2024-06-14 11:18:01,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2532 conditions, 459 events. 244/459 cut-off events. For 4098/4098 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 1945 event pairs, 38 based on Foata normal form. 3/462 useless extension candidates. Maximal degree in co-relation 2476. Up to 310 conditions per place. [2024-06-14 11:18:01,472 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 65 selfloop transitions, 21 changer transitions 1/89 dead transitions. [2024-06-14 11:18:01,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 89 transitions, 921 flow [2024-06-14 11:18:01,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:18:01,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:18:01,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 104 transitions. [2024-06-14 11:18:01,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3586206896551724 [2024-06-14 11:18:01,473 INFO L175 Difference]: Start difference. First operand has 91 places, 68 transitions, 653 flow. Second operand 10 states and 104 transitions. [2024-06-14 11:18:01,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 89 transitions, 921 flow [2024-06-14 11:18:01,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 89 transitions, 859 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-14 11:18:01,481 INFO L231 Difference]: Finished difference. Result has 93 places, 69 transitions, 657 flow [2024-06-14 11:18:01,481 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=591, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=657, PETRI_PLACES=93, PETRI_TRANSITIONS=69} [2024-06-14 11:18:01,482 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 62 predicate places. [2024-06-14 11:18:01,482 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 69 transitions, 657 flow [2024-06-14 11:18:01,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.6) internal successors, (66), 10 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:18:01,482 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:18:01,482 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:18:01,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-14 11:18:01,482 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 11:18:01,483 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:18:01,483 INFO L85 PathProgramCache]: Analyzing trace with hash -1648795708, now seen corresponding path program 4 times [2024-06-14 11:18:01,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:18:01,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29430716] [2024-06-14 11:18:01,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:18:01,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:18:01,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:18:01,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:18:01,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:18:01,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29430716] [2024-06-14 11:18:01,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29430716] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:18:01,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:18:01,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:18:01,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080143571] [2024-06-14 11:18:01,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:18:01,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:18:01,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:18:01,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:18:01,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:18:01,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-14 11:18:01,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 69 transitions, 657 flow. Second operand has 10 states, 10 states have (on average 6.6) internal successors, (66), 10 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:18:01,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:18:01,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-14 11:18:01,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:18:01,872 INFO L124 PetriNetUnfolderBase]: 262/491 cut-off events. [2024-06-14 11:18:01,873 INFO L125 PetriNetUnfolderBase]: For 4948/4952 co-relation queries the response was YES. [2024-06-14 11:18:01,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2755 conditions, 491 events. 262/491 cut-off events. For 4948/4952 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2134 event pairs, 32 based on Foata normal form. 7/498 useless extension candidates. Maximal degree in co-relation 2698. Up to 328 conditions per place. [2024-06-14 11:18:01,876 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 71 selfloop transitions, 20 changer transitions 1/94 dead transitions. [2024-06-14 11:18:01,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 94 transitions, 1009 flow [2024-06-14 11:18:01,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:18:01,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:18:01,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 106 transitions. [2024-06-14 11:18:01,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36551724137931035 [2024-06-14 11:18:01,878 INFO L175 Difference]: Start difference. First operand has 93 places, 69 transitions, 657 flow. Second operand 10 states and 106 transitions. [2024-06-14 11:18:01,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 94 transitions, 1009 flow [2024-06-14 11:18:01,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 94 transitions, 955 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-14 11:18:01,887 INFO L231 Difference]: Finished difference. Result has 96 places, 71 transitions, 687 flow [2024-06-14 11:18:01,887 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=603, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=687, PETRI_PLACES=96, PETRI_TRANSITIONS=71} [2024-06-14 11:18:01,887 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 65 predicate places. [2024-06-14 11:18:01,887 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 71 transitions, 687 flow [2024-06-14 11:18:01,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.6) internal successors, (66), 10 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:18:01,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:18:01,888 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:18:01,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-14 11:18:01,888 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 11:18:01,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:18:01,889 INFO L85 PathProgramCache]: Analyzing trace with hash -1790001328, now seen corresponding path program 5 times [2024-06-14 11:18:01,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:18:01,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023923397] [2024-06-14 11:18:01,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:18:01,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:18:01,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:18:02,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:18:02,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:18:02,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023923397] [2024-06-14 11:18:02,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023923397] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:18:02,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:18:02,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:18:02,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109732100] [2024-06-14 11:18:02,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:18:02,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:18:02,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:18:02,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:18:02,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:18:02,146 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-14 11:18:02,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 71 transitions, 687 flow. Second operand has 10 states, 10 states have (on average 6.6) internal successors, (66), 10 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:18:02,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:18:02,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-14 11:18:02,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:18:02,287 INFO L124 PetriNetUnfolderBase]: 271/508 cut-off events. [2024-06-14 11:18:02,287 INFO L125 PetriNetUnfolderBase]: For 5670/5674 co-relation queries the response was YES. [2024-06-14 11:18:02,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2894 conditions, 508 events. 271/508 cut-off events. For 5670/5674 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2255 event pairs, 36 based on Foata normal form. 7/515 useless extension candidates. Maximal degree in co-relation 2835. Up to 355 conditions per place. [2024-06-14 11:18:02,291 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 68 selfloop transitions, 21 changer transitions 1/92 dead transitions. [2024-06-14 11:18:02,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 92 transitions, 988 flow [2024-06-14 11:18:02,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:18:02,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:18:02,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 104 transitions. [2024-06-14 11:18:02,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3586206896551724 [2024-06-14 11:18:02,292 INFO L175 Difference]: Start difference. First operand has 96 places, 71 transitions, 687 flow. Second operand 10 states and 104 transitions. [2024-06-14 11:18:02,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 92 transitions, 988 flow [2024-06-14 11:18:02,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 92 transitions, 944 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-14 11:18:02,302 INFO L231 Difference]: Finished difference. Result has 99 places, 72 transitions, 716 flow [2024-06-14 11:18:02,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=643, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=716, PETRI_PLACES=99, PETRI_TRANSITIONS=72} [2024-06-14 11:18:02,302 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 68 predicate places. [2024-06-14 11:18:02,302 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 72 transitions, 716 flow [2024-06-14 11:18:02,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.6) internal successors, (66), 10 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:18:02,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:18:02,303 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:18:02,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-14 11:18:02,303 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 11:18:02,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:18:02,303 INFO L85 PathProgramCache]: Analyzing trace with hash -1642155353, now seen corresponding path program 3 times [2024-06-14 11:18:02,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:18:02,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422528266] [2024-06-14 11:18:02,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:18:02,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:18:02,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:18:02,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:18:02,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:18:02,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422528266] [2024-06-14 11:18:02,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422528266] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:18:02,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:18:02,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:18:02,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793840249] [2024-06-14 11:18:02,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:18:02,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:18:02,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:18:02,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:18:02,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:18:02,556 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-14 11:18:02,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 72 transitions, 716 flow. Second operand has 10 states, 10 states have (on average 6.6) internal successors, (66), 10 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:18:02,557 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:18:02,557 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-14 11:18:02,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:18:02,705 INFO L124 PetriNetUnfolderBase]: 289/542 cut-off events. [2024-06-14 11:18:02,705 INFO L125 PetriNetUnfolderBase]: For 6153/6157 co-relation queries the response was YES. [2024-06-14 11:18:02,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3070 conditions, 542 events. 289/542 cut-off events. For 6153/6157 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 2459 event pairs, 38 based on Foata normal form. 13/555 useless extension candidates. Maximal degree in co-relation 3010. Up to 378 conditions per place. [2024-06-14 11:18:02,709 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 75 selfloop transitions, 19 changer transitions 1/97 dead transitions. [2024-06-14 11:18:02,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 97 transitions, 1029 flow [2024-06-14 11:18:02,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:18:02,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:18:02,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 107 transitions. [2024-06-14 11:18:02,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3689655172413793 [2024-06-14 11:18:02,710 INFO L175 Difference]: Start difference. First operand has 99 places, 72 transitions, 716 flow. Second operand 10 states and 107 transitions. [2024-06-14 11:18:02,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 97 transitions, 1029 flow [2024-06-14 11:18:02,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 97 transitions, 979 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-14 11:18:02,722 INFO L231 Difference]: Finished difference. Result has 102 places, 74 transitions, 743 flow [2024-06-14 11:18:02,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=668, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=743, PETRI_PLACES=102, PETRI_TRANSITIONS=74} [2024-06-14 11:18:02,722 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 71 predicate places. [2024-06-14 11:18:02,723 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 74 transitions, 743 flow [2024-06-14 11:18:02,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.6) internal successors, (66), 10 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:18:02,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:18:02,723 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:18:02,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-14 11:18:02,723 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 11:18:02,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:18:02,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1642391728, now seen corresponding path program 6 times [2024-06-14 11:18:02,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:18:02,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115035345] [2024-06-14 11:18:02,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:18:02,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:18:02,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:18:02,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:18:02,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:18:02,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115035345] [2024-06-14 11:18:02,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115035345] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:18:02,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:18:02,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:18:02,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702096200] [2024-06-14 11:18:02,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:18:02,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:18:02,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:18:02,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:18:02,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:18:02,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-14 11:18:02,974 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 74 transitions, 743 flow. Second operand has 10 states, 10 states have (on average 6.6) internal successors, (66), 10 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:18:02,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:18:02,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-14 11:18:02,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:18:03,103 INFO L124 PetriNetUnfolderBase]: 298/559 cut-off events. [2024-06-14 11:18:03,103 INFO L125 PetriNetUnfolderBase]: For 7239/7243 co-relation queries the response was YES. [2024-06-14 11:18:03,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3290 conditions, 559 events. 298/559 cut-off events. For 7239/7243 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 2580 event pairs, 38 based on Foata normal form. 7/566 useless extension candidates. Maximal degree in co-relation 3228. Up to 394 conditions per place. [2024-06-14 11:18:03,107 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 71 selfloop transitions, 21 changer transitions 1/95 dead transitions. [2024-06-14 11:18:03,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 95 transitions, 1058 flow [2024-06-14 11:18:03,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:18:03,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:18:03,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 104 transitions. [2024-06-14 11:18:03,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3586206896551724 [2024-06-14 11:18:03,108 INFO L175 Difference]: Start difference. First operand has 102 places, 74 transitions, 743 flow. Second operand 10 states and 104 transitions. [2024-06-14 11:18:03,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 95 transitions, 1058 flow [2024-06-14 11:18:03,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 95 transitions, 1015 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-14 11:18:03,123 INFO L231 Difference]: Finished difference. Result has 106 places, 75 transitions, 775 flow [2024-06-14 11:18:03,123 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=700, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=775, PETRI_PLACES=106, PETRI_TRANSITIONS=75} [2024-06-14 11:18:03,123 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 75 predicate places. [2024-06-14 11:18:03,123 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 75 transitions, 775 flow [2024-06-14 11:18:03,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.6) internal successors, (66), 10 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:18:03,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:18:03,124 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:18:03,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-14 11:18:03,124 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 11:18:03,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:18:03,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1642391573, now seen corresponding path program 4 times [2024-06-14 11:18:03,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:18:03,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399611632] [2024-06-14 11:18:03,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:18:03,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:18:03,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:18:03,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:18:03,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:18:03,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399611632] [2024-06-14 11:18:03,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399611632] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:18:03,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:18:03,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:18:03,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264020893] [2024-06-14 11:18:03,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:18:03,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:18:03,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:18:03,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:18:03,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:18:03,346 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-14 11:18:03,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 75 transitions, 775 flow. Second operand has 10 states, 10 states have (on average 6.6) internal successors, (66), 10 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:18:03,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:18:03,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-14 11:18:03,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:18:03,505 INFO L124 PetriNetUnfolderBase]: 307/574 cut-off events. [2024-06-14 11:18:03,506 INFO L125 PetriNetUnfolderBase]: For 7631/7631 co-relation queries the response was YES. [2024-06-14 11:18:03,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3389 conditions, 574 events. 307/574 cut-off events. For 7631/7631 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 2657 event pairs, 36 based on Foata normal form. 3/577 useless extension candidates. Maximal degree in co-relation 3325. Up to 409 conditions per place. [2024-06-14 11:18:03,509 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 72 selfloop transitions, 21 changer transitions 1/96 dead transitions. [2024-06-14 11:18:03,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 96 transitions, 1063 flow [2024-06-14 11:18:03,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:18:03,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:18:03,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 104 transitions. [2024-06-14 11:18:03,510 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3586206896551724 [2024-06-14 11:18:03,511 INFO L175 Difference]: Start difference. First operand has 106 places, 75 transitions, 775 flow. Second operand 10 states and 104 transitions. [2024-06-14 11:18:03,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 96 transitions, 1063 flow [2024-06-14 11:18:03,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 96 transitions, 1013 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-14 11:18:03,523 INFO L231 Difference]: Finished difference. Result has 108 places, 76 transitions, 795 flow [2024-06-14 11:18:03,524 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=725, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=795, PETRI_PLACES=108, PETRI_TRANSITIONS=76} [2024-06-14 11:18:03,524 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 77 predicate places. [2024-06-14 11:18:03,524 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 76 transitions, 795 flow [2024-06-14 11:18:03,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.6) internal successors, (66), 10 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:18:03,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:18:03,524 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:18:03,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-14 11:18:03,525 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 11:18:03,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:18:03,525 INFO L85 PathProgramCache]: Analyzing trace with hash -802309495, now seen corresponding path program 5 times [2024-06-14 11:18:03,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:18:03,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807704078] [2024-06-14 11:18:03,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:18:03,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:18:03,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:18:03,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:18:03,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:18:03,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807704078] [2024-06-14 11:18:03,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807704078] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:18:03,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:18:03,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:18:03,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760069204] [2024-06-14 11:18:03,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:18:03,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:18:03,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:18:03,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:18:03,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:18:03,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-14 11:18:03,776 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 76 transitions, 795 flow. Second operand has 10 states, 10 states have (on average 6.6) internal successors, (66), 10 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:18:03,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:18:03,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-14 11:18:03,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:18:03,910 INFO L124 PetriNetUnfolderBase]: 325/604 cut-off events. [2024-06-14 11:18:03,910 INFO L125 PetriNetUnfolderBase]: For 8521/8525 co-relation queries the response was YES. [2024-06-14 11:18:03,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3591 conditions, 604 events. 325/604 cut-off events. For 8521/8525 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 2864 event pairs, 41 based on Foata normal form. 13/616 useless extension candidates. Maximal degree in co-relation 3526. Up to 429 conditions per place. [2024-06-14 11:18:03,917 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 75 selfloop transitions, 20 changer transitions 1/98 dead transitions. [2024-06-14 11:18:03,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 98 transitions, 1109 flow [2024-06-14 11:18:03,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:18:03,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:18:03,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 104 transitions. [2024-06-14 11:18:03,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3586206896551724 [2024-06-14 11:18:03,919 INFO L175 Difference]: Start difference. First operand has 108 places, 76 transitions, 795 flow. Second operand 10 states and 104 transitions. [2024-06-14 11:18:03,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 98 transitions, 1109 flow [2024-06-14 11:18:03,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 98 transitions, 1049 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-14 11:18:03,933 INFO L231 Difference]: Finished difference. Result has 111 places, 78 transitions, 819 flow [2024-06-14 11:18:03,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=737, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=819, PETRI_PLACES=111, PETRI_TRANSITIONS=78} [2024-06-14 11:18:03,934 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 80 predicate places. [2024-06-14 11:18:03,934 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 78 transitions, 819 flow [2024-06-14 11:18:03,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.6) internal successors, (66), 10 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:18:03,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:18:03,934 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:18:03,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-14 11:18:03,934 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 11:18:03,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:18:03,935 INFO L85 PathProgramCache]: Analyzing trace with hash -1660825599, now seen corresponding path program 6 times [2024-06-14 11:18:03,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:18:03,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36129597] [2024-06-14 11:18:03,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:18:03,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:18:03,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:18:04,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:18:04,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:18:04,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36129597] [2024-06-14 11:18:04,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36129597] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:18:04,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:18:04,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:18:04,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126226915] [2024-06-14 11:18:04,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:18:04,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:18:04,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:18:04,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:18:04,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:18:04,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-14 11:18:04,214 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 78 transitions, 819 flow. Second operand has 10 states, 10 states have (on average 6.6) internal successors, (66), 10 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:18:04,214 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:18:04,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-14 11:18:04,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:18:04,375 INFO L124 PetriNetUnfolderBase]: 334/621 cut-off events. [2024-06-14 11:18:04,376 INFO L125 PetriNetUnfolderBase]: For 9475/9479 co-relation queries the response was YES. [2024-06-14 11:18:04,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3754 conditions, 621 events. 334/621 cut-off events. For 9475/9479 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 2960 event pairs, 41 based on Foata normal form. 7/627 useless extension candidates. Maximal degree in co-relation 3687. Up to 445 conditions per place. [2024-06-14 11:18:04,380 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 71 selfloop transitions, 22 changer transitions 1/96 dead transitions. [2024-06-14 11:18:04,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 96 transitions, 1105 flow [2024-06-14 11:18:04,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:18:04,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:18:04,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 101 transitions. [2024-06-14 11:18:04,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3482758620689655 [2024-06-14 11:18:04,381 INFO L175 Difference]: Start difference. First operand has 111 places, 78 transitions, 819 flow. Second operand 10 states and 101 transitions. [2024-06-14 11:18:04,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 96 transitions, 1105 flow [2024-06-14 11:18:04,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 96 transitions, 1057 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-14 11:18:04,398 INFO L231 Difference]: Finished difference. Result has 115 places, 79 transitions, 847 flow [2024-06-14 11:18:04,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=771, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=847, PETRI_PLACES=115, PETRI_TRANSITIONS=79} [2024-06-14 11:18:04,400 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 84 predicate places. [2024-06-14 11:18:04,400 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 79 transitions, 847 flow [2024-06-14 11:18:04,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.6) internal successors, (66), 10 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:18:04,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:18:04,400 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:18:04,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-14 11:18:04,400 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 11:18:04,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:18:04,401 INFO L85 PathProgramCache]: Analyzing trace with hash -1660825754, now seen corresponding path program 7 times [2024-06-14 11:18:04,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:18:04,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742875212] [2024-06-14 11:18:04,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:18:04,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:18:04,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:18:04,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:18:04,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:18:04,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742875212] [2024-06-14 11:18:04,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742875212] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:18:04,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:18:04,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:18:04,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373278910] [2024-06-14 11:18:04,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:18:04,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:18:04,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:18:04,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:18:04,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:18:04,680 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-14 11:18:04,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 79 transitions, 847 flow. Second operand has 10 states, 10 states have (on average 6.6) internal successors, (66), 10 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:18:04,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:18:04,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-14 11:18:04,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:18:04,812 INFO L124 PetriNetUnfolderBase]: 343/636 cut-off events. [2024-06-14 11:18:04,812 INFO L125 PetriNetUnfolderBase]: For 10506/10510 co-relation queries the response was YES. [2024-06-14 11:18:04,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3925 conditions, 636 events. 343/636 cut-off events. For 10506/10510 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 3027 event pairs, 45 based on Foata normal form. 7/642 useless extension candidates. Maximal degree in co-relation 3856. Up to 460 conditions per place. [2024-06-14 11:18:04,823 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 72 selfloop transitions, 22 changer transitions 1/97 dead transitions. [2024-06-14 11:18:04,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 97 transitions, 1170 flow [2024-06-14 11:18:04,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:18:04,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:18:04,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 101 transitions. [2024-06-14 11:18:04,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3482758620689655 [2024-06-14 11:18:04,824 INFO L175 Difference]: Start difference. First operand has 115 places, 79 transitions, 847 flow. Second operand 10 states and 101 transitions. [2024-06-14 11:18:04,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 97 transitions, 1170 flow [2024-06-14 11:18:04,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 97 transitions, 1106 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-14 11:18:04,842 INFO L231 Difference]: Finished difference. Result has 117 places, 80 transitions, 862 flow [2024-06-14 11:18:04,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=783, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=862, PETRI_PLACES=117, PETRI_TRANSITIONS=80} [2024-06-14 11:18:04,842 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 86 predicate places. [2024-06-14 11:18:04,842 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 80 transitions, 862 flow [2024-06-14 11:18:04,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.6) internal successors, (66), 10 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:18:04,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:18:04,843 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:18:04,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-14 11:18:04,843 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 11:18:04,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:18:04,843 INFO L85 PathProgramCache]: Analyzing trace with hash -1808496734, now seen corresponding path program 8 times [2024-06-14 11:18:04,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:18:04,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021333981] [2024-06-14 11:18:04,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:18:04,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:18:04,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:18:05,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:18:05,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:18:05,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021333981] [2024-06-14 11:18:05,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021333981] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:18:05,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:18:05,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:18:05,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59019406] [2024-06-14 11:18:05,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:18:05,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:18:05,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:18:05,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:18:05,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:18:05,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-14 11:18:05,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 80 transitions, 862 flow. Second operand has 10 states, 10 states have (on average 6.6) internal successors, (66), 10 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:18:05,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:18:05,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-14 11:18:05,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:18:05,278 INFO L124 PetriNetUnfolderBase]: 352/653 cut-off events. [2024-06-14 11:18:05,279 INFO L125 PetriNetUnfolderBase]: For 11260/11260 co-relation queries the response was YES. [2024-06-14 11:18:05,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4055 conditions, 653 events. 352/653 cut-off events. For 11260/11260 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 3156 event pairs, 41 based on Foata normal form. 3/655 useless extension candidates. Maximal degree in co-relation 3985. Up to 460 conditions per place. [2024-06-14 11:18:05,283 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 76 selfloop transitions, 22 changer transitions 1/101 dead transitions. [2024-06-14 11:18:05,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 101 transitions, 1245 flow [2024-06-14 11:18:05,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:18:05,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:18:05,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 103 transitions. [2024-06-14 11:18:05,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35517241379310344 [2024-06-14 11:18:05,284 INFO L175 Difference]: Start difference. First operand has 117 places, 80 transitions, 862 flow. Second operand 10 states and 103 transitions. [2024-06-14 11:18:05,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 101 transitions, 1245 flow [2024-06-14 11:18:05,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 101 transitions, 1191 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-14 11:18:05,306 INFO L231 Difference]: Finished difference. Result has 119 places, 81 transitions, 889 flow [2024-06-14 11:18:05,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=808, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=889, PETRI_PLACES=119, PETRI_TRANSITIONS=81} [2024-06-14 11:18:05,306 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 88 predicate places. [2024-06-14 11:18:05,306 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 81 transitions, 889 flow [2024-06-14 11:18:05,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.6) internal successors, (66), 10 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:18:05,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:18:05,307 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:18:05,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-14 11:18:05,307 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 11:18:05,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:18:05,307 INFO L85 PathProgramCache]: Analyzing trace with hash -1808435199, now seen corresponding path program 7 times [2024-06-14 11:18:05,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:18:05,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329981204] [2024-06-14 11:18:05,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:18:05,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:18:05,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:18:05,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:18:05,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:18:05,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329981204] [2024-06-14 11:18:05,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329981204] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:18:05,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:18:05,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:18:05,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106430576] [2024-06-14 11:18:05,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:18:05,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:18:05,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:18:05,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:18:05,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:18:05,556 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-14 11:18:05,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 81 transitions, 889 flow. Second operand has 10 states, 10 states have (on average 6.6) internal successors, (66), 10 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:18:05,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:18:05,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-14 11:18:05,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:18:05,699 INFO L124 PetriNetUnfolderBase]: 361/668 cut-off events. [2024-06-14 11:18:05,700 INFO L125 PetriNetUnfolderBase]: For 11942/11946 co-relation queries the response was YES. [2024-06-14 11:18:05,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4173 conditions, 668 events. 361/668 cut-off events. For 11942/11946 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 3221 event pairs, 43 based on Foata normal form. 7/674 useless extension candidates. Maximal degree in co-relation 4102. Up to 487 conditions per place. [2024-06-14 11:18:05,705 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 73 selfloop transitions, 23 changer transitions 1/99 dead transitions. [2024-06-14 11:18:05,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 99 transitions, 1183 flow [2024-06-14 11:18:05,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:18:05,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:18:05,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 101 transitions. [2024-06-14 11:18:05,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3482758620689655 [2024-06-14 11:18:05,707 INFO L175 Difference]: Start difference. First operand has 119 places, 81 transitions, 889 flow. Second operand 10 states and 101 transitions. [2024-06-14 11:18:05,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 99 transitions, 1183 flow [2024-06-14 11:18:05,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 99 transitions, 1121 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-14 11:18:05,726 INFO L231 Difference]: Finished difference. Result has 120 places, 82 transitions, 907 flow [2024-06-14 11:18:05,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=827, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=907, PETRI_PLACES=120, PETRI_TRANSITIONS=82} [2024-06-14 11:18:05,727 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 89 predicate places. [2024-06-14 11:18:05,728 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 82 transitions, 907 flow [2024-06-14 11:18:05,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.6) internal successors, (66), 10 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:18:05,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:18:05,728 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:18:05,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-14 11:18:05,728 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 11:18:05,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:18:05,729 INFO L85 PathProgramCache]: Analyzing trace with hash -808946130, now seen corresponding path program 9 times [2024-06-14 11:18:05,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:18:05,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963356579] [2024-06-14 11:18:05,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:18:05,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:18:05,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:18:05,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:18:05,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:18:05,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963356579] [2024-06-14 11:18:05,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963356579] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:18:05,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:18:05,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:18:05,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495385906] [2024-06-14 11:18:05,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:18:05,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:18:05,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:18:05,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:18:05,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:18:06,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-14 11:18:06,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 82 transitions, 907 flow. Second operand has 10 states, 10 states have (on average 6.6) internal successors, (66), 10 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:18:06,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:18:06,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-14 11:18:06,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:18:06,191 INFO L124 PetriNetUnfolderBase]: 370/685 cut-off events. [2024-06-14 11:18:06,192 INFO L125 PetriNetUnfolderBase]: For 13341/13341 co-relation queries the response was YES. [2024-06-14 11:18:06,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4345 conditions, 685 events. 370/685 cut-off events. For 13341/13341 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 3346 event pairs, 43 based on Foata normal form. 3/687 useless extension candidates. Maximal degree in co-relation 4275. Up to 502 conditions per place. [2024-06-14 11:18:06,198 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 74 selfloop transitions, 23 changer transitions 1/100 dead transitions. [2024-06-14 11:18:06,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 100 transitions, 1242 flow [2024-06-14 11:18:06,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:18:06,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:18:06,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 101 transitions. [2024-06-14 11:18:06,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3482758620689655 [2024-06-14 11:18:06,200 INFO L175 Difference]: Start difference. First operand has 120 places, 82 transitions, 907 flow. Second operand 10 states and 101 transitions. [2024-06-14 11:18:06,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 100 transitions, 1242 flow [2024-06-14 11:18:06,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 100 transitions, 1174 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-14 11:18:06,226 INFO L231 Difference]: Finished difference. Result has 122 places, 83 transitions, 924 flow [2024-06-14 11:18:06,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=839, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=924, PETRI_PLACES=122, PETRI_TRANSITIONS=83} [2024-06-14 11:18:06,227 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 91 predicate places. [2024-06-14 11:18:06,227 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 83 transitions, 924 flow [2024-06-14 11:18:06,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.6) internal successors, (66), 10 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:18:06,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:18:06,228 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:18:06,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-14 11:18:06,228 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 11:18:06,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:18:06,228 INFO L85 PathProgramCache]: Analyzing trace with hash -580664455, now seen corresponding path program 8 times [2024-06-14 11:18:06,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:18:06,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517125552] [2024-06-14 11:18:06,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:18:06,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:18:06,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:18:06,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:18:06,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:18:06,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517125552] [2024-06-14 11:18:06,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517125552] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:18:06,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:18:06,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:18:06,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15897214] [2024-06-14 11:18:06,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:18:06,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:18:06,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:18:06,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:18:06,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:18:06,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-14 11:18:06,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 83 transitions, 924 flow. Second operand has 10 states, 10 states have (on average 6.6) internal successors, (66), 10 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:18:06,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:18:06,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-14 11:18:06,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:18:06,637 INFO L124 PetriNetUnfolderBase]: 388/721 cut-off events. [2024-06-14 11:18:06,637 INFO L125 PetriNetUnfolderBase]: For 14082/14086 co-relation queries the response was YES. [2024-06-14 11:18:06,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4501 conditions, 721 events. 388/721 cut-off events. For 14082/14086 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 3596 event pairs, 49 based on Foata normal form. 9/729 useless extension candidates. Maximal degree in co-relation 4430. Up to 525 conditions per place. [2024-06-14 11:18:06,642 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 78 selfloop transitions, 24 changer transitions 1/105 dead transitions. [2024-06-14 11:18:06,642 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 105 transitions, 1261 flow [2024-06-14 11:18:06,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:18:06,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:18:06,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 105 transitions. [2024-06-14 11:18:06,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3620689655172414 [2024-06-14 11:18:06,643 INFO L175 Difference]: Start difference. First operand has 122 places, 83 transitions, 924 flow. Second operand 10 states and 105 transitions. [2024-06-14 11:18:06,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 105 transitions, 1261 flow [2024-06-14 11:18:06,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 105 transitions, 1199 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-14 11:18:06,669 INFO L231 Difference]: Finished difference. Result has 125 places, 85 transitions, 961 flow [2024-06-14 11:18:06,669 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=864, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=961, PETRI_PLACES=125, PETRI_TRANSITIONS=85} [2024-06-14 11:18:06,669 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 94 predicate places. [2024-06-14 11:18:06,669 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 85 transitions, 961 flow [2024-06-14 11:18:06,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.6) internal successors, (66), 10 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:18:06,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:18:06,670 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:18:06,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-14 11:18:06,670 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 11:18:06,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:18:06,670 INFO L85 PathProgramCache]: Analyzing trace with hash -580900675, now seen corresponding path program 9 times [2024-06-14 11:18:06,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:18:06,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637295190] [2024-06-14 11:18:06,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:18:06,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:18:06,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:18:06,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:18:06,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:18:06,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637295190] [2024-06-14 11:18:06,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637295190] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:18:06,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:18:06,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:18:06,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981560936] [2024-06-14 11:18:06,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:18:06,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:18:06,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:18:06,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:18:06,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:18:06,909 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-14 11:18:06,910 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 85 transitions, 961 flow. Second operand has 10 states, 10 states have (on average 6.6) internal successors, (66), 10 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:18:06,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:18:06,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-14 11:18:06,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:18:07,098 INFO L124 PetriNetUnfolderBase]: 397/736 cut-off events. [2024-06-14 11:18:07,098 INFO L125 PetriNetUnfolderBase]: For 15301/15305 co-relation queries the response was YES. [2024-06-14 11:18:07,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4705 conditions, 736 events. 397/736 cut-off events. For 15301/15305 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 3700 event pairs, 47 based on Foata normal form. 3/738 useless extension candidates. Maximal degree in co-relation 4632. Up to 541 conditions per place. [2024-06-14 11:18:07,105 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 74 selfloop transitions, 26 changer transitions 1/103 dead transitions. [2024-06-14 11:18:07,105 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 103 transitions, 1269 flow [2024-06-14 11:18:07,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:18:07,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:18:07,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 102 transitions. [2024-06-14 11:18:07,106 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35172413793103446 [2024-06-14 11:18:07,106 INFO L175 Difference]: Start difference. First operand has 125 places, 85 transitions, 961 flow. Second operand 10 states and 102 transitions. [2024-06-14 11:18:07,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 103 transitions, 1269 flow [2024-06-14 11:18:07,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 103 transitions, 1207 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-14 11:18:07,131 INFO L231 Difference]: Finished difference. Result has 129 places, 86 transitions, 989 flow [2024-06-14 11:18:07,131 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=899, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=989, PETRI_PLACES=129, PETRI_TRANSITIONS=86} [2024-06-14 11:18:07,133 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 98 predicate places. [2024-06-14 11:18:07,134 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 86 transitions, 989 flow [2024-06-14 11:18:07,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.6) internal successors, (66), 10 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:18:07,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:18:07,134 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:18:07,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-14 11:18:07,134 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 11:18:07,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:18:07,135 INFO L85 PathProgramCache]: Analyzing trace with hash -580900830, now seen corresponding path program 10 times [2024-06-14 11:18:07,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:18:07,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154993973] [2024-06-14 11:18:07,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:18:07,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:18:07,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:18:07,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:18:07,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:18:07,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154993973] [2024-06-14 11:18:07,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154993973] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:18:07,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:18:07,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:18:07,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302724028] [2024-06-14 11:18:07,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:18:07,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:18:07,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:18:07,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:18:07,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:18:07,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-14 11:18:07,380 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 86 transitions, 989 flow. Second operand has 10 states, 10 states have (on average 6.6) internal successors, (66), 10 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:18:07,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:18:07,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-14 11:18:07,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:18:07,527 INFO L124 PetriNetUnfolderBase]: 391/727 cut-off events. [2024-06-14 11:18:07,527 INFO L125 PetriNetUnfolderBase]: For 14715/14719 co-relation queries the response was YES. [2024-06-14 11:18:07,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4526 conditions, 727 events. 391/727 cut-off events. For 14715/14719 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 3677 event pairs, 45 based on Foata normal form. 3/729 useless extension candidates. Maximal degree in co-relation 4451. Up to 532 conditions per place. [2024-06-14 11:18:07,532 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 74 selfloop transitions, 26 changer transitions 1/103 dead transitions. [2024-06-14 11:18:07,532 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 103 transitions, 1305 flow [2024-06-14 11:18:07,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:18:07,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:18:07,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 102 transitions. [2024-06-14 11:18:07,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35172413793103446 [2024-06-14 11:18:07,533 INFO L175 Difference]: Start difference. First operand has 129 places, 86 transitions, 989 flow. Second operand 10 states and 102 transitions. [2024-06-14 11:18:07,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 103 transitions, 1305 flow [2024-06-14 11:18:07,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 103 transitions, 1227 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-14 11:18:07,559 INFO L231 Difference]: Finished difference. Result has 131 places, 86 transitions, 967 flow [2024-06-14 11:18:07,559 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=911, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=967, PETRI_PLACES=131, PETRI_TRANSITIONS=86} [2024-06-14 11:18:07,559 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 100 predicate places. [2024-06-14 11:18:07,559 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 86 transitions, 967 flow [2024-06-14 11:18:07,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.6) internal successors, (66), 10 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:18:07,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:18:07,560 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:18:07,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-14 11:18:07,560 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 11:18:07,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:18:07,560 INFO L85 PathProgramCache]: Analyzing trace with hash -572620885, now seen corresponding path program 10 times [2024-06-14 11:18:07,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:18:07,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484220195] [2024-06-14 11:18:07,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:18:07,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:18:07,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:18:07,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:18:07,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:18:07,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484220195] [2024-06-14 11:18:07,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484220195] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:18:07,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:18:07,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:18:07,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083829412] [2024-06-14 11:18:07,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:18:07,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:18:07,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:18:07,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:18:07,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:18:07,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-14 11:18:07,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 86 transitions, 967 flow. Second operand has 10 states, 10 states have (on average 6.6) internal successors, (66), 10 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:18:07,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:18:07,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-14 11:18:07,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:18:07,946 INFO L124 PetriNetUnfolderBase]: 391/731 cut-off events. [2024-06-14 11:18:07,946 INFO L125 PetriNetUnfolderBase]: For 14767/14771 co-relation queries the response was YES. [2024-06-14 11:18:07,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4518 conditions, 731 events. 391/731 cut-off events. For 14767/14771 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 3680 event pairs, 48 based on Foata normal form. 9/739 useless extension candidates. Maximal degree in co-relation 4442. Up to 546 conditions per place. [2024-06-14 11:18:07,951 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 79 selfloop transitions, 24 changer transitions 0/105 dead transitions. [2024-06-14 11:18:07,951 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 105 transitions, 1281 flow [2024-06-14 11:18:07,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:18:07,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:18:07,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 101 transitions. [2024-06-14 11:18:07,952 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3482758620689655 [2024-06-14 11:18:07,952 INFO L175 Difference]: Start difference. First operand has 131 places, 86 transitions, 967 flow. Second operand 10 states and 101 transitions. [2024-06-14 11:18:07,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 105 transitions, 1281 flow [2024-06-14 11:18:08,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 105 transitions, 1185 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-14 11:18:08,014 INFO L231 Difference]: Finished difference. Result has 133 places, 87 transitions, 963 flow [2024-06-14 11:18:08,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=871, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=963, PETRI_PLACES=133, PETRI_TRANSITIONS=87} [2024-06-14 11:18:08,015 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 102 predicate places. [2024-06-14 11:18:08,015 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 87 transitions, 963 flow [2024-06-14 11:18:08,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.6) internal successors, (66), 10 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:18:08,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:18:08,015 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:18:08,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-14 11:18:08,015 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 11:18:08,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:18:08,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1236290187, now seen corresponding path program 1 times [2024-06-14 11:18:08,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:18:08,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261526642] [2024-06-14 11:18:08,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:18:08,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:18:08,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:18:08,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:18:08,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:18:08,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261526642] [2024-06-14 11:18:08,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261526642] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:18:08,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:18:08,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 11:18:08,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652269444] [2024-06-14 11:18:08,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:18:08,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 11:18:08,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:18:08,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 11:18:08,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-14 11:18:08,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-14 11:18:08,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 87 transitions, 963 flow. Second operand has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 11 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:18:08,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:18:08,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-14 11:18:08,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:18:08,518 INFO L124 PetriNetUnfolderBase]: 418/784 cut-off events. [2024-06-14 11:18:08,518 INFO L125 PetriNetUnfolderBase]: For 18227/18231 co-relation queries the response was YES. [2024-06-14 11:18:08,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4838 conditions, 784 events. 418/784 cut-off events. For 18227/18231 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 4008 event pairs, 11 based on Foata normal form. 13/797 useless extension candidates. Maximal degree in co-relation 4761. Up to 442 conditions per place. [2024-06-14 11:18:08,525 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 71 selfloop transitions, 27 changer transitions 22/122 dead transitions. [2024-06-14 11:18:08,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 122 transitions, 1527 flow [2024-06-14 11:18:08,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 11:18:08,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 11:18:08,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 123 transitions. [2024-06-14 11:18:08,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38557993730407525 [2024-06-14 11:18:08,526 INFO L175 Difference]: Start difference. First operand has 133 places, 87 transitions, 963 flow. Second operand 11 states and 123 transitions. [2024-06-14 11:18:08,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 122 transitions, 1527 flow [2024-06-14 11:18:08,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 122 transitions, 1410 flow, removed 17 selfloop flow, removed 12 redundant places. [2024-06-14 11:18:08,553 INFO L231 Difference]: Finished difference. Result has 132 places, 83 transitions, 860 flow [2024-06-14 11:18:08,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=846, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=860, PETRI_PLACES=132, PETRI_TRANSITIONS=83} [2024-06-14 11:18:08,554 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 101 predicate places. [2024-06-14 11:18:08,554 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 83 transitions, 860 flow [2024-06-14 11:18:08,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 11 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:18:08,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:18:08,554 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:18:08,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-14 11:18:08,554 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 11:18:08,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:18:08,555 INFO L85 PathProgramCache]: Analyzing trace with hash -501376663, now seen corresponding path program 2 times [2024-06-14 11:18:08,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:18:08,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887002601] [2024-06-14 11:18:08,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:18:08,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:18:08,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:18:08,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:18:08,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:18:08,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887002601] [2024-06-14 11:18:08,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887002601] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:18:08,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:18:08,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 11:18:08,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621422293] [2024-06-14 11:18:08,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:18:08,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 11:18:08,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:18:08,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 11:18:08,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-14 11:18:08,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-14 11:18:08,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 83 transitions, 860 flow. Second operand has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 11 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:18:08,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:18:08,846 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-14 11:18:08,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:18:09,020 INFO L124 PetriNetUnfolderBase]: 377/705 cut-off events. [2024-06-14 11:18:09,020 INFO L125 PetriNetUnfolderBase]: For 16016/16020 co-relation queries the response was YES. [2024-06-14 11:18:09,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4222 conditions, 705 events. 377/705 cut-off events. For 16016/16020 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 3532 event pairs, 37 based on Foata normal form. 13/718 useless extension candidates. Maximal degree in co-relation 4149. Up to 443 conditions per place. [2024-06-14 11:18:09,024 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 68 selfloop transitions, 24 changer transitions 18/112 dead transitions. [2024-06-14 11:18:09,024 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 112 transitions, 1334 flow [2024-06-14 11:18:09,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 11:18:09,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 11:18:09,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 117 transitions. [2024-06-14 11:18:09,025 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3667711598746082 [2024-06-14 11:18:09,025 INFO L175 Difference]: Start difference. First operand has 132 places, 83 transitions, 860 flow. Second operand 11 states and 117 transitions. [2024-06-14 11:18:09,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 112 transitions, 1334 flow [2024-06-14 11:18:09,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 112 transitions, 1264 flow, removed 2 selfloop flow, removed 12 redundant places. [2024-06-14 11:18:09,048 INFO L231 Difference]: Finished difference. Result has 126 places, 80 transitions, 806 flow [2024-06-14 11:18:09,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=790, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=806, PETRI_PLACES=126, PETRI_TRANSITIONS=80} [2024-06-14 11:18:09,048 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 95 predicate places. [2024-06-14 11:18:09,049 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 80 transitions, 806 flow [2024-06-14 11:18:09,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 11 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:18:09,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:18:09,049 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:18:09,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-14 11:18:09,049 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 11:18:09,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:18:09,050 INFO L85 PathProgramCache]: Analyzing trace with hash -499473883, now seen corresponding path program 3 times [2024-06-14 11:18:09,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:18:09,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076353184] [2024-06-14 11:18:09,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:18:09,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:18:09,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:18:09,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:18:09,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:18:09,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076353184] [2024-06-14 11:18:09,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076353184] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:18:09,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:18:09,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 11:18:09,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527750115] [2024-06-14 11:18:09,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:18:09,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 11:18:09,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:18:09,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 11:18:09,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-14 11:18:09,332 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-14 11:18:09,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 80 transitions, 806 flow. Second operand has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 11 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:18:09,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:18:09,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-14 11:18:09,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:18:09,505 INFO L124 PetriNetUnfolderBase]: 357/669 cut-off events. [2024-06-14 11:18:09,506 INFO L125 PetriNetUnfolderBase]: For 15364/15368 co-relation queries the response was YES. [2024-06-14 11:18:09,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3916 conditions, 669 events. 357/669 cut-off events. For 15364/15368 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 3316 event pairs, 37 based on Foata normal form. 13/682 useless extension candidates. Maximal degree in co-relation 3846. Up to 423 conditions per place. [2024-06-14 11:18:09,510 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 66 selfloop transitions, 25 changer transitions 13/106 dead transitions. [2024-06-14 11:18:09,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 106 transitions, 1206 flow [2024-06-14 11:18:09,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 11:18:09,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 11:18:09,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 114 transitions. [2024-06-14 11:18:09,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3573667711598746 [2024-06-14 11:18:09,511 INFO L175 Difference]: Start difference. First operand has 126 places, 80 transitions, 806 flow. Second operand 11 states and 114 transitions. [2024-06-14 11:18:09,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 106 transitions, 1206 flow [2024-06-14 11:18:09,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 106 transitions, 1154 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-14 11:18:09,528 INFO L231 Difference]: Finished difference. Result has 123 places, 78 transitions, 782 flow [2024-06-14 11:18:09,528 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=754, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=782, PETRI_PLACES=123, PETRI_TRANSITIONS=78} [2024-06-14 11:18:09,529 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 92 predicate places. [2024-06-14 11:18:09,529 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 78 transitions, 782 flow [2024-06-14 11:18:09,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 11 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:18:09,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:18:09,529 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:18:09,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-14 11:18:09,529 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 11:18:09,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:18:09,530 INFO L85 PathProgramCache]: Analyzing trace with hash -499469233, now seen corresponding path program 4 times [2024-06-14 11:18:09,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:18:09,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496625546] [2024-06-14 11:18:09,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:18:09,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:18:09,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:18:09,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:18:09,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:18:09,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496625546] [2024-06-14 11:18:09,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496625546] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:18:09,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:18:09,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 11:18:09,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669846454] [2024-06-14 11:18:09,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:18:09,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 11:18:09,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:18:09,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 11:18:09,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-14 11:18:09,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-14 11:18:09,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 78 transitions, 782 flow. Second operand has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 11 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:18:09,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:18:09,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-14 11:18:09,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:18:09,983 INFO L124 PetriNetUnfolderBase]: 346/652 cut-off events. [2024-06-14 11:18:09,983 INFO L125 PetriNetUnfolderBase]: For 14321/14325 co-relation queries the response was YES. [2024-06-14 11:18:09,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3760 conditions, 652 events. 346/652 cut-off events. For 14321/14325 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 3216 event pairs, 37 based on Foata normal form. 13/665 useless extension candidates. Maximal degree in co-relation 3691. Up to 406 conditions per place. [2024-06-14 11:18:09,987 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 60 selfloop transitions, 21 changer transitions 21/104 dead transitions. [2024-06-14 11:18:09,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 104 transitions, 1134 flow [2024-06-14 11:18:10,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 11:18:10,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 11:18:10,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 113 transitions. [2024-06-14 11:18:10,005 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3542319749216301 [2024-06-14 11:18:10,005 INFO L175 Difference]: Start difference. First operand has 123 places, 78 transitions, 782 flow. Second operand 11 states and 113 transitions. [2024-06-14 11:18:10,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 104 transitions, 1134 flow [2024-06-14 11:18:10,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 104 transitions, 1080 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-14 11:18:10,050 INFO L231 Difference]: Finished difference. Result has 121 places, 73 transitions, 738 flow [2024-06-14 11:18:10,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=728, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=738, PETRI_PLACES=121, PETRI_TRANSITIONS=73} [2024-06-14 11:18:10,050 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 90 predicate places. [2024-06-14 11:18:10,050 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 73 transitions, 738 flow [2024-06-14 11:18:10,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 11 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:18:10,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:18:10,051 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:18:10,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-14 11:18:10,051 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 11:18:10,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:18:10,052 INFO L85 PathProgramCache]: Analyzing trace with hash 342631717, now seen corresponding path program 5 times [2024-06-14 11:18:10,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:18:10,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446346080] [2024-06-14 11:18:10,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:18:10,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:18:10,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:18:10,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:18:10,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:18:10,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446346080] [2024-06-14 11:18:10,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446346080] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:18:10,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:18:10,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 11:18:10,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342657690] [2024-06-14 11:18:10,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:18:10,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 11:18:10,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:18:10,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 11:18:10,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-14 11:18:10,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-14 11:18:10,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 73 transitions, 738 flow. Second operand has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 11 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:18:10,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:18:10,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-14 11:18:10,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:18:10,517 INFO L124 PetriNetUnfolderBase]: 329/616 cut-off events. [2024-06-14 11:18:10,517 INFO L125 PetriNetUnfolderBase]: For 12979/12979 co-relation queries the response was YES. [2024-06-14 11:18:10,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3611 conditions, 616 events. 329/616 cut-off events. For 12979/12979 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 2980 event pairs, 33 based on Foata normal form. 9/625 useless extension candidates. Maximal degree in co-relation 3543. Up to 377 conditions per place. [2024-06-14 11:18:10,521 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 60 selfloop transitions, 19 changer transitions 18/99 dead transitions. [2024-06-14 11:18:10,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 99 transitions, 1178 flow [2024-06-14 11:18:10,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 11:18:10,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 11:18:10,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 113 transitions. [2024-06-14 11:18:10,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3542319749216301 [2024-06-14 11:18:10,522 INFO L175 Difference]: Start difference. First operand has 121 places, 73 transitions, 738 flow. Second operand 11 states and 113 transitions. [2024-06-14 11:18:10,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 99 transitions, 1178 flow [2024-06-14 11:18:10,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 99 transitions, 1091 flow, removed 18 selfloop flow, removed 11 redundant places. [2024-06-14 11:18:10,541 INFO L231 Difference]: Finished difference. Result has 114 places, 70 transitions, 671 flow [2024-06-14 11:18:10,541 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=663, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=671, PETRI_PLACES=114, PETRI_TRANSITIONS=70} [2024-06-14 11:18:10,541 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 83 predicate places. [2024-06-14 11:18:10,542 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 70 transitions, 671 flow [2024-06-14 11:18:10,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 11 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:18:10,542 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:18:10,542 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:18:10,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-14 11:18:10,542 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 11:18:10,542 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:18:10,542 INFO L85 PathProgramCache]: Analyzing trace with hash 1218275177, now seen corresponding path program 6 times [2024-06-14 11:18:10,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:18:10,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135035729] [2024-06-14 11:18:10,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:18:10,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:18:10,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:18:10,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:18:10,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:18:10,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135035729] [2024-06-14 11:18:10,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135035729] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:18:10,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:18:10,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 11:18:10,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863214900] [2024-06-14 11:18:10,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:18:10,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 11:18:10,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:18:10,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 11:18:10,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-14 11:18:10,843 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-14 11:18:10,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 70 transitions, 671 flow. Second operand has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 11 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:18:10,843 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:18:10,843 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-14 11:18:10,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:18:10,978 INFO L124 PetriNetUnfolderBase]: 309/580 cut-off events. [2024-06-14 11:18:10,978 INFO L125 PetriNetUnfolderBase]: For 11049/11053 co-relation queries the response was YES. [2024-06-14 11:18:10,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3226 conditions, 580 events. 309/580 cut-off events. For 11049/11053 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 2758 event pairs, 33 based on Foata normal form. 13/593 useless extension candidates. Maximal degree in co-relation 3161. Up to 357 conditions per place. [2024-06-14 11:18:10,982 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 58 selfloop transitions, 20 changer transitions 13/93 dead transitions. [2024-06-14 11:18:10,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 93 transitions, 1029 flow [2024-06-14 11:18:10,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 11:18:10,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 11:18:10,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 110 transitions. [2024-06-14 11:18:10,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3448275862068966 [2024-06-14 11:18:10,983 INFO L175 Difference]: Start difference. First operand has 114 places, 70 transitions, 671 flow. Second operand 11 states and 110 transitions. [2024-06-14 11:18:10,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 93 transitions, 1029 flow [2024-06-14 11:18:10,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 93 transitions, 987 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-14 11:18:10,999 INFO L231 Difference]: Finished difference. Result has 111 places, 68 transitions, 649 flow [2024-06-14 11:18:10,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=629, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=649, PETRI_PLACES=111, PETRI_TRANSITIONS=68} [2024-06-14 11:18:10,999 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 80 predicate places. [2024-06-14 11:18:11,000 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 68 transitions, 649 flow [2024-06-14 11:18:11,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 11 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:18:11,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:18:11,000 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:18:11,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-14 11:18:11,000 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 11:18:11,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:18:11,001 INFO L85 PathProgramCache]: Analyzing trace with hash 427061391, now seen corresponding path program 7 times [2024-06-14 11:18:11,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:18:11,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170165901] [2024-06-14 11:18:11,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:18:11,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:18:11,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:18:11,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:18:11,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:18:11,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170165901] [2024-06-14 11:18:11,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170165901] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:18:11,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:18:11,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 11:18:11,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397826185] [2024-06-14 11:18:11,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:18:11,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 11:18:11,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:18:11,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 11:18:11,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-14 11:18:11,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-14 11:18:11,281 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 68 transitions, 649 flow. Second operand has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 11 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:18:11,281 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:18:11,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-14 11:18:11,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:18:11,441 INFO L124 PetriNetUnfolderBase]: 298/563 cut-off events. [2024-06-14 11:18:11,442 INFO L125 PetriNetUnfolderBase]: For 10716/10720 co-relation queries the response was YES. [2024-06-14 11:18:11,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3080 conditions, 563 events. 298/563 cut-off events. For 10716/10720 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 2677 event pairs, 15 based on Foata normal form. 13/576 useless extension candidates. Maximal degree in co-relation 3016. Up to 340 conditions per place. [2024-06-14 11:18:11,444 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 55 selfloop transitions, 17 changer transitions 17/91 dead transitions. [2024-06-14 11:18:11,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 91 transitions, 963 flow [2024-06-14 11:18:11,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 11:18:11,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 11:18:11,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 109 transitions. [2024-06-14 11:18:11,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34169278996865204 [2024-06-14 11:18:11,447 INFO L175 Difference]: Start difference. First operand has 111 places, 68 transitions, 649 flow. Second operand 11 states and 109 transitions. [2024-06-14 11:18:11,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 91 transitions, 963 flow [2024-06-14 11:18:11,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 91 transitions, 919 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-14 11:18:11,459 INFO L231 Difference]: Finished difference. Result has 109 places, 64 transitions, 611 flow [2024-06-14 11:18:11,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=605, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=611, PETRI_PLACES=109, PETRI_TRANSITIONS=64} [2024-06-14 11:18:11,459 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 78 predicate places. [2024-06-14 11:18:11,459 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 64 transitions, 611 flow [2024-06-14 11:18:11,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 11 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:18:11,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:18:11,460 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:18:11,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-14 11:18:11,460 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 11:18:11,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:18:11,460 INFO L85 PathProgramCache]: Analyzing trace with hash 632792271, now seen corresponding path program 8 times [2024-06-14 11:18:11,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:18:11,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703566041] [2024-06-14 11:18:11,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:18:11,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:18:11,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:18:11,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:18:11,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:18:11,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703566041] [2024-06-14 11:18:11,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703566041] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:18:11,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:18:11,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 11:18:11,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099802956] [2024-06-14 11:18:11,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:18:11,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 11:18:11,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:18:11,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 11:18:11,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-06-14 11:18:11,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-14 11:18:11,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 64 transitions, 611 flow. Second operand has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 11 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:18:11,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:18:11,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-14 11:18:11,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:18:11,909 INFO L124 PetriNetUnfolderBase]: 285/538 cut-off events. [2024-06-14 11:18:11,910 INFO L125 PetriNetUnfolderBase]: For 9690/9690 co-relation queries the response was YES. [2024-06-14 11:18:11,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2972 conditions, 538 events. 285/538 cut-off events. For 9690/9690 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 2508 event pairs, 33 based on Foata normal form. 9/547 useless extension candidates. Maximal degree in co-relation 2909. Up to 319 conditions per place. [2024-06-14 11:18:11,912 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 54 selfloop transitions, 16 changer transitions 18/90 dead transitions. [2024-06-14 11:18:11,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 90 transitions, 941 flow [2024-06-14 11:18:11,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 11:18:11,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 11:18:11,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 112 transitions. [2024-06-14 11:18:11,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3510971786833856 [2024-06-14 11:18:11,914 INFO L175 Difference]: Start difference. First operand has 109 places, 64 transitions, 611 flow. Second operand 11 states and 112 transitions. [2024-06-14 11:18:11,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 90 transitions, 941 flow [2024-06-14 11:18:11,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 90 transitions, 883 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-14 11:18:11,928 INFO L231 Difference]: Finished difference. Result has 104 places, 61 transitions, 561 flow [2024-06-14 11:18:11,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=557, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=561, PETRI_PLACES=104, PETRI_TRANSITIONS=61} [2024-06-14 11:18:11,930 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 73 predicate places. [2024-06-14 11:18:11,930 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 61 transitions, 561 flow [2024-06-14 11:18:11,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 11 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:18:11,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:18:11,931 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:18:11,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-14 11:18:11,931 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 11:18:11,931 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:18:11,931 INFO L85 PathProgramCache]: Analyzing trace with hash 625464801, now seen corresponding path program 9 times [2024-06-14 11:18:11,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:18:11,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095251987] [2024-06-14 11:18:11,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:18:11,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:18:11,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:18:12,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:18:12,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:18:12,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095251987] [2024-06-14 11:18:12,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095251987] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:18:12,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:18:12,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 11:18:12,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130543611] [2024-06-14 11:18:12,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:18:12,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 11:18:12,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:18:12,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 11:18:12,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-06-14 11:18:12,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-14 11:18:12,251 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 61 transitions, 561 flow. Second operand has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 11 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:18:12,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:18:12,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-14 11:18:12,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:18:12,373 INFO L124 PetriNetUnfolderBase]: 265/502 cut-off events. [2024-06-14 11:18:12,373 INFO L125 PetriNetUnfolderBase]: For 8119/8119 co-relation queries the response was YES. [2024-06-14 11:18:12,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2716 conditions, 502 events. 265/502 cut-off events. For 8119/8119 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 2303 event pairs, 33 based on Foata normal form. 9/511 useless extension candidates. Maximal degree in co-relation 2655. Up to 299 conditions per place. [2024-06-14 11:18:12,376 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 52 selfloop transitions, 17 changer transitions 13/84 dead transitions. [2024-06-14 11:18:12,376 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 84 transitions, 893 flow [2024-06-14 11:18:12,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 11:18:12,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 11:18:12,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 109 transitions. [2024-06-14 11:18:12,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34169278996865204 [2024-06-14 11:18:12,381 INFO L175 Difference]: Start difference. First operand has 104 places, 61 transitions, 561 flow. Second operand 11 states and 109 transitions. [2024-06-14 11:18:12,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 84 transitions, 893 flow [2024-06-14 11:18:12,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 84 transitions, 845 flow, removed 8 selfloop flow, removed 10 redundant places. [2024-06-14 11:18:12,391 INFO L231 Difference]: Finished difference. Result has 100 places, 59 transitions, 537 flow [2024-06-14 11:18:12,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=521, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=537, PETRI_PLACES=100, PETRI_TRANSITIONS=59} [2024-06-14 11:18:12,391 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 69 predicate places. [2024-06-14 11:18:12,391 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 59 transitions, 537 flow [2024-06-14 11:18:12,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 11 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:18:12,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:18:12,392 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:18:12,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-14 11:18:12,392 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 11:18:12,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:18:12,392 INFO L85 PathProgramCache]: Analyzing trace with hash 625469451, now seen corresponding path program 10 times [2024-06-14 11:18:12,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:18:12,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346985814] [2024-06-14 11:18:12,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:18:12,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:18:12,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:18:12,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:18:12,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:18:12,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346985814] [2024-06-14 11:18:12,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346985814] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:18:12,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:18:12,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 11:18:12,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281230055] [2024-06-14 11:18:12,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:18:12,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 11:18:12,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:18:12,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 11:18:12,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-06-14 11:18:12,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-14 11:18:12,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 59 transitions, 537 flow. Second operand has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 11 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:18:12,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:18:12,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-14 11:18:12,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:18:12,749 INFO L124 PetriNetUnfolderBase]: 254/485 cut-off events. [2024-06-14 11:18:12,749 INFO L125 PetriNetUnfolderBase]: For 7368/7372 co-relation queries the response was YES. [2024-06-14 11:18:12,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2529 conditions, 485 events. 254/485 cut-off events. For 7368/7372 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 2188 event pairs, 15 based on Foata normal form. 13/498 useless extension candidates. Maximal degree in co-relation 2470. Up to 282 conditions per place. [2024-06-14 11:18:12,751 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 45 selfloop transitions, 12 changer transitions 23/82 dead transitions. [2024-06-14 11:18:12,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 82 transitions, 825 flow [2024-06-14 11:18:12,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 11:18:12,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 11:18:12,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 108 transitions. [2024-06-14 11:18:12,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3385579937304075 [2024-06-14 11:18:12,752 INFO L175 Difference]: Start difference. First operand has 100 places, 59 transitions, 537 flow. Second operand 11 states and 108 transitions. [2024-06-14 11:18:12,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 82 transitions, 825 flow [2024-06-14 11:18:12,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 82 transitions, 787 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-14 11:18:12,760 INFO L231 Difference]: Finished difference. Result has 98 places, 53 transitions, 474 flow [2024-06-14 11:18:12,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=499, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=474, PETRI_PLACES=98, PETRI_TRANSITIONS=53} [2024-06-14 11:18:12,760 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 67 predicate places. [2024-06-14 11:18:12,760 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 53 transitions, 474 flow [2024-06-14 11:18:12,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 11 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:18:12,760 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:18:12,760 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:18:12,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-14 11:18:12,761 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 11:18:12,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:18:12,761 INFO L85 PathProgramCache]: Analyzing trace with hash 61337465, now seen corresponding path program 11 times [2024-06-14 11:18:12,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:18:12,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072084626] [2024-06-14 11:18:12,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:18:12,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:18:12,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:18:13,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:18:13,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:18:13,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072084626] [2024-06-14 11:18:13,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072084626] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:18:13,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:18:13,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 11:18:13,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841147636] [2024-06-14 11:18:13,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:18:13,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 11:18:13,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:18:13,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 11:18:13,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-06-14 11:18:13,076 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-14 11:18:13,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 53 transitions, 474 flow. Second operand has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 11 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:18:13,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:18:13,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-14 11:18:13,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:18:13,191 INFO L124 PetriNetUnfolderBase]: 236/441 cut-off events. [2024-06-14 11:18:13,191 INFO L125 PetriNetUnfolderBase]: For 6492/6496 co-relation queries the response was YES. [2024-06-14 11:18:13,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2359 conditions, 441 events. 236/441 cut-off events. For 6492/6496 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 1945 event pairs, 32 based on Foata normal form. 13/454 useless extension candidates. Maximal degree in co-relation 2301. Up to 261 conditions per place. [2024-06-14 11:18:13,193 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 44 selfloop transitions, 12 changer transitions 18/76 dead transitions. [2024-06-14 11:18:13,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 76 transitions, 760 flow [2024-06-14 11:18:13,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 11:18:13,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 11:18:13,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 107 transitions. [2024-06-14 11:18:13,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.335423197492163 [2024-06-14 11:18:13,221 INFO L175 Difference]: Start difference. First operand has 98 places, 53 transitions, 474 flow. Second operand 11 states and 107 transitions. [2024-06-14 11:18:13,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 76 transitions, 760 flow [2024-06-14 11:18:13,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 76 transitions, 694 flow, removed 15 selfloop flow, removed 13 redundant places. [2024-06-14 11:18:13,229 INFO L231 Difference]: Finished difference. Result has 87 places, 50 transitions, 410 flow [2024-06-14 11:18:13,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=414, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=410, PETRI_PLACES=87, PETRI_TRANSITIONS=50} [2024-06-14 11:18:13,231 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 56 predicate places. [2024-06-14 11:18:13,232 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 50 transitions, 410 flow [2024-06-14 11:18:13,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 11 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:18:13,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:18:13,232 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:18:13,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-14 11:18:13,236 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 11:18:13,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:18:13,236 INFO L85 PathProgramCache]: Analyzing trace with hash 54009995, now seen corresponding path program 12 times [2024-06-14 11:18:13,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:18:13,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194314301] [2024-06-14 11:18:13,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:18:13,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:18:13,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:18:13,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:18:13,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:18:13,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194314301] [2024-06-14 11:18:13,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194314301] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:18:13,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:18:13,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 11:18:13,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946122168] [2024-06-14 11:18:13,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:18:13,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 11:18:13,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:18:13,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 11:18:13,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-06-14 11:18:13,542 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-14 11:18:13,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 50 transitions, 410 flow. Second operand has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 11 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:18:13,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:18:13,542 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-14 11:18:13,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:18:13,661 INFO L124 PetriNetUnfolderBase]: 216/407 cut-off events. [2024-06-14 11:18:13,661 INFO L125 PetriNetUnfolderBase]: For 5037/5041 co-relation queries the response was YES. [2024-06-14 11:18:13,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2074 conditions, 407 events. 216/407 cut-off events. For 5037/5041 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 1749 event pairs, 32 based on Foata normal form. 13/420 useless extension candidates. Maximal degree in co-relation 2022. Up to 241 conditions per place. [2024-06-14 11:18:13,663 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 42 selfloop transitions, 13 changer transitions 13/70 dead transitions. [2024-06-14 11:18:13,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 70 transitions, 686 flow [2024-06-14 11:18:13,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 11:18:13,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 11:18:13,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 104 transitions. [2024-06-14 11:18:13,664 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32601880877742945 [2024-06-14 11:18:13,664 INFO L175 Difference]: Start difference. First operand has 87 places, 50 transitions, 410 flow. Second operand 11 states and 104 transitions. [2024-06-14 11:18:13,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 70 transitions, 686 flow [2024-06-14 11:18:13,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 70 transitions, 646 flow, removed 8 selfloop flow, removed 10 redundant places. [2024-06-14 11:18:13,670 INFO L231 Difference]: Finished difference. Result has 83 places, 48 transitions, 388 flow [2024-06-14 11:18:13,670 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=378, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=388, PETRI_PLACES=83, PETRI_TRANSITIONS=48} [2024-06-14 11:18:13,670 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 52 predicate places. [2024-06-14 11:18:13,671 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 48 transitions, 388 flow [2024-06-14 11:18:13,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 11 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:18:13,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:18:13,671 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:18:13,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-14 11:18:13,671 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 11:18:13,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:18:13,672 INFO L85 PathProgramCache]: Analyzing trace with hash 54014645, now seen corresponding path program 13 times [2024-06-14 11:18:13,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:18:13,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702995775] [2024-06-14 11:18:13,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:18:13,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:18:13,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:18:13,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:18:13,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:18:13,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702995775] [2024-06-14 11:18:13,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702995775] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:18:13,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:18:13,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 11:18:13,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334104292] [2024-06-14 11:18:13,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:18:13,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 11:18:13,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:18:13,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 11:18:13,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-06-14 11:18:13,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-14 11:18:13,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 48 transitions, 388 flow. Second operand has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 11 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:18:13,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:18:13,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-14 11:18:13,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:18:14,088 INFO L124 PetriNetUnfolderBase]: 205/388 cut-off events. [2024-06-14 11:18:14,088 INFO L125 PetriNetUnfolderBase]: For 4228/4228 co-relation queries the response was YES. [2024-06-14 11:18:14,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1905 conditions, 388 events. 205/388 cut-off events. For 4228/4228 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 1652 event pairs, 32 based on Foata normal form. 9/397 useless extension candidates. Maximal degree in co-relation 1855. Up to 224 conditions per place. [2024-06-14 11:18:14,090 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 39 selfloop transitions, 10 changer transitions 17/68 dead transitions. [2024-06-14 11:18:14,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 68 transitions, 630 flow [2024-06-14 11:18:14,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 11:18:14,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 11:18:14,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 103 transitions. [2024-06-14 11:18:14,090 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.322884012539185 [2024-06-14 11:18:14,091 INFO L175 Difference]: Start difference. First operand has 83 places, 48 transitions, 388 flow. Second operand 11 states and 103 transitions. [2024-06-14 11:18:14,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 68 transitions, 630 flow [2024-06-14 11:18:14,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 68 transitions, 600 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-14 11:18:14,095 INFO L231 Difference]: Finished difference. Result has 81 places, 44 transitions, 346 flow [2024-06-14 11:18:14,095 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=358, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=346, PETRI_PLACES=81, PETRI_TRANSITIONS=44} [2024-06-14 11:18:14,095 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 50 predicate places. [2024-06-14 11:18:14,096 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 44 transitions, 346 flow [2024-06-14 11:18:14,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 11 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:18:14,096 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:18:14,096 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:18:14,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-14 11:18:14,096 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 11:18:14,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:18:14,097 INFO L85 PathProgramCache]: Analyzing trace with hash -228823089, now seen corresponding path program 14 times [2024-06-14 11:18:14,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:18:14,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156081982] [2024-06-14 11:18:14,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:18:14,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:18:14,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:18:14,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:18:14,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:18:14,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156081982] [2024-06-14 11:18:14,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156081982] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:18:14,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:18:14,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 11:18:14,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216710544] [2024-06-14 11:18:14,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:18:14,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 11:18:14,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:18:14,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 11:18:14,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-14 11:18:14,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-14 11:18:14,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 44 transitions, 346 flow. Second operand has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 11 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:18:14,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:18:14,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-14 11:18:14,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:18:14,492 INFO L124 PetriNetUnfolderBase]: 192/361 cut-off events. [2024-06-14 11:18:14,493 INFO L125 PetriNetUnfolderBase]: For 3766/3768 co-relation queries the response was YES. [2024-06-14 11:18:14,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1791 conditions, 361 events. 192/361 cut-off events. For 3766/3768 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 1482 event pairs, 28 based on Foata normal form. 11/372 useless extension candidates. Maximal degree in co-relation 1742. Up to 189 conditions per place. [2024-06-14 11:18:14,494 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 36 selfloop transitions, 11 changer transitions 18/67 dead transitions. [2024-06-14 11:18:14,494 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 67 transitions, 648 flow [2024-06-14 11:18:14,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 11:18:14,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 11:18:14,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 106 transitions. [2024-06-14 11:18:14,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3322884012539185 [2024-06-14 11:18:14,497 INFO L175 Difference]: Start difference. First operand has 81 places, 44 transitions, 346 flow. Second operand 11 states and 106 transitions. [2024-06-14 11:18:14,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 67 transitions, 648 flow [2024-06-14 11:18:14,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 67 transitions, 590 flow, removed 19 selfloop flow, removed 10 redundant places. [2024-06-14 11:18:14,500 INFO L231 Difference]: Finished difference. Result has 75 places, 41 transitions, 304 flow [2024-06-14 11:18:14,503 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=306, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=304, PETRI_PLACES=75, PETRI_TRANSITIONS=41} [2024-06-14 11:18:14,504 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 44 predicate places. [2024-06-14 11:18:14,504 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 41 transitions, 304 flow [2024-06-14 11:18:14,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 11 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:18:14,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:18:14,505 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:18:14,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-14 11:18:14,505 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 11:18:14,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:18:14,505 INFO L85 PathProgramCache]: Analyzing trace with hash -226920309, now seen corresponding path program 15 times [2024-06-14 11:18:14,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:18:14,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028862806] [2024-06-14 11:18:14,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:18:14,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:18:14,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:18:14,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:18:14,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:18:14,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028862806] [2024-06-14 11:18:14,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028862806] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:18:14,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:18:14,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 11:18:14,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357228720] [2024-06-14 11:18:14,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:18:14,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 11:18:14,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:18:14,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 11:18:14,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-14 11:18:14,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-14 11:18:14,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 41 transitions, 304 flow. Second operand has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 11 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:18:14,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:18:14,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-14 11:18:14,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:18:14,876 INFO L124 PetriNetUnfolderBase]: 172/329 cut-off events. [2024-06-14 11:18:14,876 INFO L125 PetriNetUnfolderBase]: For 2766/2766 co-relation queries the response was YES. [2024-06-14 11:18:14,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1505 conditions, 329 events. 172/329 cut-off events. For 2766/2766 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1303 event pairs, 28 based on Foata normal form. 9/338 useless extension candidates. Maximal degree in co-relation 1459. Up to 169 conditions per place. [2024-06-14 11:18:14,878 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 34 selfloop transitions, 12 changer transitions 13/61 dead transitions. [2024-06-14 11:18:14,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 61 transitions, 542 flow [2024-06-14 11:18:14,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 11:18:14,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 11:18:14,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 103 transitions. [2024-06-14 11:18:14,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.322884012539185 [2024-06-14 11:18:14,879 INFO L175 Difference]: Start difference. First operand has 75 places, 41 transitions, 304 flow. Second operand 11 states and 103 transitions. [2024-06-14 11:18:14,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 61 transitions, 542 flow [2024-06-14 11:18:14,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 61 transitions, 508 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-06-14 11:18:14,882 INFO L231 Difference]: Finished difference. Result has 71 places, 39 transitions, 284 flow [2024-06-14 11:18:14,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=284, PETRI_PLACES=71, PETRI_TRANSITIONS=39} [2024-06-14 11:18:14,883 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 40 predicate places. [2024-06-14 11:18:14,883 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 39 transitions, 284 flow [2024-06-14 11:18:14,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 11 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:18:14,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:18:14,883 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:18:14,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-14 11:18:14,884 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 11:18:14,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:18:14,884 INFO L85 PathProgramCache]: Analyzing trace with hash -226915659, now seen corresponding path program 16 times [2024-06-14 11:18:14,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:18:14,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402897997] [2024-06-14 11:18:14,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:18:14,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:18:14,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:18:15,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:18:15,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:18:15,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402897997] [2024-06-14 11:18:15,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402897997] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:18:15,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:18:15,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 11:18:15,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686071362] [2024-06-14 11:18:15,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:18:15,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 11:18:15,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:18:15,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 11:18:15,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-14 11:18:15,166 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-14 11:18:15,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 39 transitions, 284 flow. Second operand has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 11 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:18:15,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:18:15,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-14 11:18:15,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:18:15,241 INFO L124 PetriNetUnfolderBase]: 161/310 cut-off events. [2024-06-14 11:18:15,241 INFO L125 PetriNetUnfolderBase]: For 2279/2279 co-relation queries the response was YES. [2024-06-14 11:18:15,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1360 conditions, 310 events. 161/310 cut-off events. For 2279/2279 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1192 event pairs, 10 based on Foata normal form. 9/319 useless extension candidates. Maximal degree in co-relation 1316. Up to 152 conditions per place. [2024-06-14 11:18:15,243 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 30 selfloop transitions, 8 changer transitions 19/59 dead transitions. [2024-06-14 11:18:15,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 59 transitions, 496 flow [2024-06-14 11:18:15,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 11:18:15,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 11:18:15,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 102 transitions. [2024-06-14 11:18:15,265 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31974921630094044 [2024-06-14 11:18:15,265 INFO L175 Difference]: Start difference. First operand has 71 places, 39 transitions, 284 flow. Second operand 11 states and 102 transitions. [2024-06-14 11:18:15,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 59 transitions, 496 flow [2024-06-14 11:18:15,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 59 transitions, 468 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-14 11:18:15,268 INFO L231 Difference]: Finished difference. Result has 69 places, 34 transitions, 241 flow [2024-06-14 11:18:15,268 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=241, PETRI_PLACES=69, PETRI_TRANSITIONS=34} [2024-06-14 11:18:15,269 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 38 predicate places. [2024-06-14 11:18:15,269 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 34 transitions, 241 flow [2024-06-14 11:18:15,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 11 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:18:15,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:18:15,269 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:18:15,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-14 11:18:15,270 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 11:18:15,270 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:18:15,270 INFO L85 PathProgramCache]: Analyzing trace with hash -820728259, now seen corresponding path program 17 times [2024-06-14 11:18:15,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:18:15,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913585526] [2024-06-14 11:18:15,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:18:15,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:18:15,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:18:15,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:18:15,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:18:15,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913585526] [2024-06-14 11:18:15,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913585526] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:18:15,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:18:15,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 11:18:15,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159665678] [2024-06-14 11:18:15,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:18:15,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 11:18:15,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:18:15,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 11:18:15,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-06-14 11:18:15,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-14 11:18:15,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 34 transitions, 241 flow. Second operand has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 11 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:18:15,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:18:15,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-14 11:18:15,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:18:15,581 INFO L124 PetriNetUnfolderBase]: 147/278 cut-off events. [2024-06-14 11:18:15,582 INFO L125 PetriNetUnfolderBase]: For 2080/2088 co-relation queries the response was YES. [2024-06-14 11:18:15,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1242 conditions, 278 events. 147/278 cut-off events. For 2080/2088 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1036 event pairs, 28 based on Foata normal form. 17/295 useless extension candidates. Maximal degree in co-relation 1199. Up to 131 conditions per place. [2024-06-14 11:18:15,583 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 28 selfloop transitions, 9 changer transitions 18/57 dead transitions. [2024-06-14 11:18:15,583 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 57 transitions, 465 flow [2024-06-14 11:18:15,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 11:18:15,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 11:18:15,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 106 transitions. [2024-06-14 11:18:15,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3322884012539185 [2024-06-14 11:18:15,584 INFO L175 Difference]: Start difference. First operand has 69 places, 34 transitions, 241 flow. Second operand 11 states and 106 transitions. [2024-06-14 11:18:15,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 57 transitions, 465 flow [2024-06-14 11:18:15,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 57 transitions, 414 flow, removed 15 selfloop flow, removed 10 redundant places. [2024-06-14 11:18:15,587 INFO L231 Difference]: Finished difference. Result has 61 places, 31 transitions, 195 flow [2024-06-14 11:18:15,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=195, PETRI_PLACES=61, PETRI_TRANSITIONS=31} [2024-06-14 11:18:15,587 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 30 predicate places. [2024-06-14 11:18:15,587 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 31 transitions, 195 flow [2024-06-14 11:18:15,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 11 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:18:15,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:18:15,588 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:18:15,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-14 11:18:15,588 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 11:18:15,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:18:15,588 INFO L85 PathProgramCache]: Analyzing trace with hash -828051079, now seen corresponding path program 18 times [2024-06-14 11:18:15,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:18:15,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797807789] [2024-06-14 11:18:15,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:18:15,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:18:15,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:18:15,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:18:15,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:18:15,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797807789] [2024-06-14 11:18:15,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797807789] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:18:15,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:18:15,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 11:18:15,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838226979] [2024-06-14 11:18:15,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:18:15,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 11:18:15,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:18:15,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 11:18:15,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-14 11:18:15,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-14 11:18:15,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 31 transitions, 195 flow. Second operand has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 11 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:18:15,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:18:15,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-14 11:18:15,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:18:15,881 INFO L124 PetriNetUnfolderBase]: 127/246 cut-off events. [2024-06-14 11:18:15,881 INFO L125 PetriNetUnfolderBase]: For 1313/1313 co-relation queries the response was YES. [2024-06-14 11:18:15,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 991 conditions, 246 events. 127/246 cut-off events. For 1313/1313 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 881 event pairs, 28 based on Foata normal form. 9/255 useless extension candidates. Maximal degree in co-relation 953. Up to 111 conditions per place. [2024-06-14 11:18:15,882 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 26 selfloop transitions, 10 changer transitions 13/51 dead transitions. [2024-06-14 11:18:15,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 51 transitions, 379 flow [2024-06-14 11:18:15,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 11:18:15,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 11:18:15,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 103 transitions. [2024-06-14 11:18:15,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.322884012539185 [2024-06-14 11:18:15,883 INFO L175 Difference]: Start difference. First operand has 61 places, 31 transitions, 195 flow. Second operand 11 states and 103 transitions. [2024-06-14 11:18:15,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 51 transitions, 379 flow [2024-06-14 11:18:15,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 51 transitions, 346 flow, removed 6 selfloop flow, removed 11 redundant places. [2024-06-14 11:18:15,885 INFO L231 Difference]: Finished difference. Result has 56 places, 29 transitions, 175 flow [2024-06-14 11:18:15,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=175, PETRI_PLACES=56, PETRI_TRANSITIONS=29} [2024-06-14 11:18:15,885 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 25 predicate places. [2024-06-14 11:18:15,885 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 29 transitions, 175 flow [2024-06-14 11:18:15,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 11 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:18:15,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:18:15,886 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:18:15,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-14 11:18:15,886 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 11:18:15,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:18:15,886 INFO L85 PathProgramCache]: Analyzing trace with hash -828055729, now seen corresponding path program 19 times [2024-06-14 11:18:15,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:18:15,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571556594] [2024-06-14 11:18:15,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:18:15,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:18:15,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:18:16,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:18:16,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:18:16,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571556594] [2024-06-14 11:18:16,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571556594] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:18:16,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:18:16,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 11:18:16,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322193659] [2024-06-14 11:18:16,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:18:16,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 11:18:16,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:18:16,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 11:18:16,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-14 11:18:16,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-14 11:18:16,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 29 transitions, 175 flow. Second operand has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 11 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:18:16,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:18:16,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-14 11:18:16,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:18:16,242 INFO L124 PetriNetUnfolderBase]: 116/229 cut-off events. [2024-06-14 11:18:16,243 INFO L125 PetriNetUnfolderBase]: For 984/984 co-relation queries the response was YES. [2024-06-14 11:18:16,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 887 conditions, 229 events. 116/229 cut-off events. For 984/984 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 802 event pairs, 10 based on Foata normal form. 9/238 useless extension candidates. Maximal degree in co-relation 852. Up to 94 conditions per place. [2024-06-14 11:18:16,243 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 23 selfloop transitions, 7 changer transitions 17/49 dead transitions. [2024-06-14 11:18:16,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 49 transitions, 361 flow [2024-06-14 11:18:16,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 11:18:16,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 11:18:16,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 102 transitions. [2024-06-14 11:18:16,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31974921630094044 [2024-06-14 11:18:16,244 INFO L175 Difference]: Start difference. First operand has 56 places, 29 transitions, 175 flow. Second operand 11 states and 102 transitions. [2024-06-14 11:18:16,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 49 transitions, 361 flow [2024-06-14 11:18:16,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 49 transitions, 331 flow, removed 5 selfloop flow, removed 10 redundant places. [2024-06-14 11:18:16,246 INFO L231 Difference]: Finished difference. Result has 54 places, 25 transitions, 140 flow [2024-06-14 11:18:16,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=149, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=140, PETRI_PLACES=54, PETRI_TRANSITIONS=25} [2024-06-14 11:18:16,246 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 23 predicate places. [2024-06-14 11:18:16,246 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 25 transitions, 140 flow [2024-06-14 11:18:16,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 11 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:18:16,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:18:16,247 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:18:16,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-14 11:18:16,247 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 11:18:16,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:18:16,247 INFO L85 PathProgramCache]: Analyzing trace with hash -571377589, now seen corresponding path program 20 times [2024-06-14 11:18:16,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:18:16,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757544120] [2024-06-14 11:18:16,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:18:16,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:18:16,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:18:16,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:18:16,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:18:16,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757544120] [2024-06-14 11:18:16,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757544120] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:18:16,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:18:16,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 11:18:16,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647692233] [2024-06-14 11:18:16,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:18:16,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 11:18:16,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:18:16,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 11:18:16,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-06-14 11:18:16,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-14 11:18:16,519 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 25 transitions, 140 flow. Second operand has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 11 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:18:16,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:18:16,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-14 11:18:16,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:18:16,595 INFO L124 PetriNetUnfolderBase]: 58/124 cut-off events. [2024-06-14 11:18:16,595 INFO L125 PetriNetUnfolderBase]: For 443/443 co-relation queries the response was YES. [2024-06-14 11:18:16,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 426 conditions, 124 events. 58/124 cut-off events. For 443/443 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 313 event pairs, 0 based on Foata normal form. 9/133 useless extension candidates. Maximal degree in co-relation 410. Up to 51 conditions per place. [2024-06-14 11:18:16,595 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 0 selfloop transitions, 0 changer transitions 39/39 dead transitions. [2024-06-14 11:18:16,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 39 transitions, 250 flow [2024-06-14 11:18:16,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 11:18:16,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 11:18:16,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 93 transitions. [2024-06-14 11:18:16,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29153605015673983 [2024-06-14 11:18:16,596 INFO L175 Difference]: Start difference. First operand has 54 places, 25 transitions, 140 flow. Second operand 11 states and 93 transitions. [2024-06-14 11:18:16,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 39 transitions, 250 flow [2024-06-14 11:18:16,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 39 transitions, 222 flow, removed 3 selfloop flow, removed 11 redundant places. [2024-06-14 11:18:16,597 INFO L231 Difference]: Finished difference. Result has 45 places, 0 transitions, 0 flow [2024-06-14 11:18:16,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=0, PETRI_PLACES=45, PETRI_TRANSITIONS=0} [2024-06-14 11:18:16,598 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 14 predicate places. [2024-06-14 11:18:16,598 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 0 transitions, 0 flow [2024-06-14 11:18:16,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 11 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:18:16,600 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 4 remaining) [2024-06-14 11:18:16,601 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 4 remaining) [2024-06-14 11:18:16,601 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2024-06-14 11:18:16,601 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2024-06-14 11:18:16,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-14 11:18:16,601 INFO L445 BasicCegarLoop]: Path program histogram: [20, 10, 10, 6, 1, 1, 1, 1, 1] [2024-06-14 11:18:16,603 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-06-14 11:18:16,603 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-06-14 11:18:16,606 INFO L507 ceAbstractionStarter]: Automizer considered 2 witness invariants [2024-06-14 11:18:16,606 INFO L508 ceAbstractionStarter]: WitnessConsidered=2 [2024-06-14 11:18:16,607 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.06 11:18:16 BasicIcfg [2024-06-14 11:18:16,607 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-06-14 11:18:16,608 INFO L158 Benchmark]: Toolchain (without parser) took 22980.69ms. Allocated memory was 172.0MB in the beginning and 583.0MB in the end (delta: 411.0MB). Free memory was 111.8MB in the beginning and 243.7MB in the end (delta: -131.9MB). Peak memory consumption was 281.0MB. Max. memory is 16.1GB. [2024-06-14 11:18:16,608 INFO L158 Benchmark]: CDTParser took 0.39ms. Allocated memory is still 172.0MB. Free memory is still 132.7MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-14 11:18:16,608 INFO L158 Benchmark]: Witness Parser took 0.19ms. Allocated memory is still 172.0MB. Free memory is still 115.5MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-14 11:18:16,608 INFO L158 Benchmark]: CACSL2BoogieTranslator took 512.47ms. Allocated memory is still 172.0MB. Free memory was 111.3MB in the beginning and 85.7MB in the end (delta: 25.7MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2024-06-14 11:18:16,608 INFO L158 Benchmark]: Boogie Procedure Inliner took 34.21ms. Allocated memory is still 172.0MB. Free memory was 85.7MB in the beginning and 83.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-14 11:18:16,609 INFO L158 Benchmark]: Boogie Preprocessor took 64.54ms. Allocated memory is still 172.0MB. Free memory was 83.6MB in the beginning and 81.5MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-14 11:18:16,609 INFO L158 Benchmark]: RCFGBuilder took 484.30ms. Allocated memory was 172.0MB in the beginning and 257.9MB in the end (delta: 86.0MB). Free memory was 81.5MB in the beginning and 205.6MB in the end (delta: -124.0MB). Peak memory consumption was 15.0MB. Max. memory is 16.1GB. [2024-06-14 11:18:16,609 INFO L158 Benchmark]: TraceAbstraction took 21880.29ms. Allocated memory was 257.9MB in the beginning and 583.0MB in the end (delta: 325.1MB). Free memory was 204.5MB in the beginning and 243.7MB in the end (delta: -39.1MB). Peak memory consumption was 287.0MB. Max. memory is 16.1GB. [2024-06-14 11:18:16,610 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.39ms. Allocated memory is still 172.0MB. Free memory is still 132.7MB. There was no memory consumed. Max. memory is 16.1GB. * Witness Parser took 0.19ms. Allocated memory is still 172.0MB. Free memory is still 115.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 512.47ms. Allocated memory is still 172.0MB. Free memory was 111.3MB in the beginning and 85.7MB in the end (delta: 25.7MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 34.21ms. Allocated memory is still 172.0MB. Free memory was 85.7MB in the beginning and 83.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 64.54ms. Allocated memory is still 172.0MB. Free memory was 83.6MB in the beginning and 81.5MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 484.30ms. Allocated memory was 172.0MB in the beginning and 257.9MB in the end (delta: 86.0MB). Free memory was 81.5MB in the beginning and 205.6MB in the end (delta: -124.0MB). Peak memory consumption was 15.0MB. Max. memory is 16.1GB. * TraceAbstraction took 21880.29ms. Allocated memory was 257.9MB in the beginning and 583.0MB in the end (delta: 325.1MB). Free memory was 204.5MB in the beginning and 243.7MB in the end (delta: -39.1MB). Peak memory consumption was 287.0MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 721]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 722]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 39 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 21.8s, OverallIterations: 51, TraceHistogramMax: 1, PathProgramHistogramMax: 20, EmptinessCheckTime: 0.0s, AutomataDifference: 10.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 3402 SdHoareTripleChecker+Valid, 6.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2968 mSDsluCounter, 574 SdHoareTripleChecker+Invalid, 5.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 473 mSDsCounter, 463 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 15731 IncrementalHoareTripleChecker+Invalid, 16194 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 463 mSolverCounterUnsat, 101 mSDtfsCounter, 15731 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 407 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 407 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 4.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=989occurred in iteration=29, InterpolantAutomatonStates: 509, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 11.0s InterpolantComputationTime, 902 NumberOfCodeBlocks, 902 NumberOfCodeBlocksAsserted, 51 NumberOfCheckSat, 851 ConstructedInterpolants, 0 QuantifiedInterpolants, 17729 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 51 InterpolantComputations, 51 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-06-14 11:18:16,634 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE