./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-atomic/peterson.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/peterson.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-atomic/peterson.i ./goblint.2024-05-21_14-57-05.files/protection/peterson.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 11:18:07,080 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-14 11:18:07,152 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-14 11:18:07,158 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-14 11:18:07,158 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-14 11:18:07,186 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-14 11:18:07,186 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-14 11:18:07,186 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-14 11:18:07,187 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-14 11:18:07,190 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-14 11:18:07,190 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-14 11:18:07,190 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-14 11:18:07,191 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-14 11:18:07,192 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-14 11:18:07,192 INFO L153 SettingsManager]: * Use SBE=true [2024-06-14 11:18:07,192 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-14 11:18:07,192 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-14 11:18:07,192 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-14 11:18:07,193 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-14 11:18:07,193 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-14 11:18:07,194 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-14 11:18:07,194 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-14 11:18:07,194 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-14 11:18:07,194 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-14 11:18:07,195 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-14 11:18:07,195 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-14 11:18:07,195 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-14 11:18:07,195 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-14 11:18:07,196 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-14 11:18:07,196 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-14 11:18:07,197 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-14 11:18:07,197 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-14 11:18:07,197 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 11:18:07,197 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-14 11:18:07,197 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-14 11:18:07,198 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-14 11:18:07,198 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-14 11:18:07,198 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-14 11:18:07,198 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-14 11:18:07,198 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-14 11:18:07,198 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-14 11:18:07,199 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-14 11:18:07,199 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-14 11:18:07,199 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-14 11:18:07,402 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-14 11:18:07,422 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-14 11:18:07,424 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-14 11:18:07,424 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-14 11:18:07,425 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-14 11:18:07,426 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/peterson.yml/witness.yml [2024-06-14 11:18:07,520 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-14 11:18:07,521 INFO L274 PluginConnector]: CDTParser initialized [2024-06-14 11:18:07,521 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-atomic/peterson.i [2024-06-14 11:18:08,460 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-14 11:18:08,677 INFO L384 CDTParser]: Found 1 translation units. [2024-06-14 11:18:08,678 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-atomic/peterson.i [2024-06-14 11:18:08,687 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e9d12b621/e34f0ea80adc448ebc98cebe0743b548/FLAG49b91352b [2024-06-14 11:18:08,696 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e9d12b621/e34f0ea80adc448ebc98cebe0743b548 [2024-06-14 11:18:08,702 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-14 11:18:08,703 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-14 11:18:08,704 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-14 11:18:08,704 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-14 11:18:08,707 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-14 11:18:08,708 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 11:18:07" (1/2) ... [2024-06-14 11:18:08,708 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26164724 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:18:08, skipping insertion in model container [2024-06-14 11:18:08,709 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 11:18:07" (1/2) ... [2024-06-14 11:18:08,710 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1bc7ef8a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:18:08, skipping insertion in model container [2024-06-14 11:18:08,711 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 11:18:08" (2/2) ... [2024-06-14 11:18:08,711 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26164724 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:18:08, skipping insertion in model container [2024-06-14 11:18:08,711 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 11:18:08" (2/2) ... [2024-06-14 11:18:08,711 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-14 11:18:08,731 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-14 11:18:08,732 INFO L97 edCorrectnessWitness]: Location invariant before [L763-L763] (((! multithreaded || ((0 <= turn && turn <= 1) && (turn == 0 || turn == 1))) && (! multithreaded || ((0 <= flag2 && flag2 <= 1) && (flag2 == 0 || flag2 == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= flag1 && flag1 <= 1) && (flag1 == 0 || flag1 == 1))) [2024-06-14 11:18:08,732 INFO L97 edCorrectnessWitness]: Location invariant before [L762-L762] (((! multithreaded || ((0 <= turn && turn <= 1) && (turn == 0 || turn == 1))) && (! multithreaded || ((0 <= flag2 && flag2 <= 1) && (flag2 == 0 || flag2 == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= flag1 && flag1 <= 1) && (flag1 == 0 || flag1 == 1))) [2024-06-14 11:18:08,732 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-14 11:18:08,733 INFO L106 edCorrectnessWitness]: ghost_update [L761-L761] multithreaded = 1; [2024-06-14 11:18:08,767 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-14 11:18:09,024 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 11:18:09,031 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-14 11:18:09,105 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 11:18:09,131 INFO L206 MainTranslator]: Completed translation [2024-06-14 11:18:09,131 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:18:09 WrapperNode [2024-06-14 11:18:09,132 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-14 11:18:09,132 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-14 11:18:09,133 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-14 11:18:09,133 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-14 11:18:09,138 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:18:09" (1/1) ... [2024-06-14 11:18:09,153 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:18:09" (1/1) ... [2024-06-14 11:18:09,170 INFO L138 Inliner]: procedures = 169, calls = 38, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 103 [2024-06-14 11:18:09,170 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-14 11:18:09,171 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-14 11:18:09,171 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-14 11:18:09,171 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-14 11:18:09,178 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:18:09" (1/1) ... [2024-06-14 11:18:09,179 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:18:09" (1/1) ... [2024-06-14 11:18:09,181 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:18:09" (1/1) ... [2024-06-14 11:18:09,190 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 11:18:09,191 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:18:09" (1/1) ... [2024-06-14 11:18:09,191 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:18:09" (1/1) ... [2024-06-14 11:18:09,199 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:18:09" (1/1) ... [2024-06-14 11:18:09,201 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:18:09" (1/1) ... [2024-06-14 11:18:09,203 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:18:09" (1/1) ... [2024-06-14 11:18:09,204 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:18:09" (1/1) ... [2024-06-14 11:18:09,205 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-14 11:18:09,206 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-14 11:18:09,206 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-14 11:18:09,206 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-14 11:18:09,207 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:18:09" (1/1) ... [2024-06-14 11:18:09,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 11:18:09,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 11:18:09,233 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 11:18:09,240 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 11:18:09,265 INFO L130 BoogieDeclarations]: Found specification of procedure thr2 [2024-06-14 11:18:09,265 INFO L138 BoogieDeclarations]: Found implementation of procedure thr2 [2024-06-14 11:18:09,266 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2024-06-14 11:18:09,266 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2024-06-14 11:18:09,266 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-14 11:18:09,266 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-14 11:18:09,266 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-14 11:18:09,266 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-14 11:18:09,267 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-14 11:18:09,267 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-14 11:18:09,271 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 11:18:09,388 INFO L244 CfgBuilder]: Building ICFG [2024-06-14 11:18:09,390 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-14 11:18:09,507 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-14 11:18:09,507 INFO L293 CfgBuilder]: Performing block encoding [2024-06-14 11:18:09,571 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-14 11:18:09,572 INFO L320 CfgBuilder]: Removed 2 assume(true) statements. [2024-06-14 11:18:09,572 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 11:18:09 BoogieIcfgContainer [2024-06-14 11:18:09,572 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-14 11:18:09,574 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-14 11:18:09,574 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-14 11:18:09,576 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-14 11:18:09,577 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 11:18:07" (1/4) ... [2024-06-14 11:18:09,577 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d89b0da and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 11:18:09, skipping insertion in model container [2024-06-14 11:18:09,577 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.06 11:18:08" (2/4) ... [2024-06-14 11:18:09,577 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d89b0da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 11:18:09, skipping insertion in model container [2024-06-14 11:18:09,578 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:18:09" (3/4) ... [2024-06-14 11:18:09,578 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d89b0da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 11:18:09, skipping insertion in model container [2024-06-14 11:18:09,578 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 11:18:09" (4/4) ... [2024-06-14 11:18:09,579 INFO L112 eAbstractionObserver]: Analyzing ICFG peterson.i [2024-06-14 11:18:09,593 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-14 11:18:09,594 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-06-14 11:18:09,594 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-14 11:18:09,640 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-06-14 11:18:09,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 43 places, 38 transitions, 90 flow [2024-06-14 11:18:09,707 INFO L124 PetriNetUnfolderBase]: 2/36 cut-off events. [2024-06-14 11:18:09,707 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-06-14 11:18:09,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45 conditions, 36 events. 2/36 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 51 event pairs, 0 based on Foata normal form. 0/32 useless extension candidates. Maximal degree in co-relation 31. Up to 2 conditions per place. [2024-06-14 11:18:09,717 INFO L82 GeneralOperation]: Start removeDead. Operand has 43 places, 38 transitions, 90 flow [2024-06-14 11:18:09,720 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 39 places, 34 transitions, 77 flow [2024-06-14 11:18:09,727 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-14 11:18:09,733 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;@4c9fbfed, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-14 11:18:09,733 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-06-14 11:18:09,736 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-14 11:18:09,736 INFO L124 PetriNetUnfolderBase]: 0/7 cut-off events. [2024-06-14 11:18:09,736 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 11:18:09,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:18:09,737 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-14 11:18:09,737 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 11:18:09,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:18:09,741 INFO L85 PathProgramCache]: Analyzing trace with hash -2026818422, now seen corresponding path program 1 times [2024-06-14 11:18:09,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:18:09,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606243921] [2024-06-14 11:18:09,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:18:09,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:18:09,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:18:10,086 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 11:18:10,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:18:10,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606243921] [2024-06-14 11:18:10,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606243921] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:18:10,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:18:10,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-14 11:18:10,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090673562] [2024-06-14 11:18:10,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:18:10,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-14 11:18:10,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:18:10,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-14 11:18:10,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-14 11:18:10,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 38 [2024-06-14 11:18:10,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 34 transitions, 77 flow. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 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 11:18:10,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:18:10,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 38 [2024-06-14 11:18:10,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:18:10,266 INFO L124 PetriNetUnfolderBase]: 105/278 cut-off events. [2024-06-14 11:18:10,267 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2024-06-14 11:18:10,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 473 conditions, 278 events. 105/278 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1295 event pairs, 50 based on Foata normal form. 1/257 useless extension candidates. Maximal degree in co-relation 441. Up to 168 conditions per place. [2024-06-14 11:18:10,273 INFO L140 encePairwiseOnDemand]: 33/38 looper letters, 21 selfloop transitions, 3 changer transitions 0/40 dead transitions. [2024-06-14 11:18:10,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 40 transitions, 140 flow [2024-06-14 11:18:10,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-14 11:18:10,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-14 11:18:10,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 80 transitions. [2024-06-14 11:18:10,283 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7017543859649122 [2024-06-14 11:18:10,285 INFO L175 Difference]: Start difference. First operand has 39 places, 34 transitions, 77 flow. Second operand 3 states and 80 transitions. [2024-06-14 11:18:10,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 40 transitions, 140 flow [2024-06-14 11:18:10,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 40 transitions, 134 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-14 11:18:10,289 INFO L231 Difference]: Finished difference. Result has 39 places, 36 transitions, 93 flow [2024-06-14 11:18:10,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=93, PETRI_PLACES=39, PETRI_TRANSITIONS=36} [2024-06-14 11:18:10,296 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 0 predicate places. [2024-06-14 11:18:10,296 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 36 transitions, 93 flow [2024-06-14 11:18:10,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 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 11:18:10,296 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:18:10,296 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:18:10,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-14 11:18:10,297 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 11:18:10,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:18:10,299 INFO L85 PathProgramCache]: Analyzing trace with hash 2143230211, now seen corresponding path program 1 times [2024-06-14 11:18:10,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:18:10,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789258394] [2024-06-14 11:18:10,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:18:10,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:18:10,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:18:10,420 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 11:18:10,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:18:10,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789258394] [2024-06-14 11:18:10,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789258394] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:18:10,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:18:10,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 11:18:10,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172459251] [2024-06-14 11:18:10,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:18:10,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 11:18:10,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:18:10,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 11:18:10,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-14 11:18:10,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 38 [2024-06-14 11:18:10,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 36 transitions, 93 flow. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 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 11:18:10,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:18:10,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 38 [2024-06-14 11:18:10,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:18:10,575 INFO L124 PetriNetUnfolderBase]: 121/291 cut-off events. [2024-06-14 11:18:10,575 INFO L125 PetriNetUnfolderBase]: For 44/44 co-relation queries the response was YES. [2024-06-14 11:18:10,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 580 conditions, 291 events. 121/291 cut-off events. For 44/44 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1338 event pairs, 52 based on Foata normal form. 2/273 useless extension candidates. Maximal degree in co-relation 449. Up to 191 conditions per place. [2024-06-14 11:18:10,579 INFO L140 encePairwiseOnDemand]: 32/38 looper letters, 26 selfloop transitions, 5 changer transitions 0/46 dead transitions. [2024-06-14 11:18:10,579 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 46 transitions, 181 flow [2024-06-14 11:18:10,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 11:18:10,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 11:18:10,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 101 transitions. [2024-06-14 11:18:10,582 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6644736842105263 [2024-06-14 11:18:10,582 INFO L175 Difference]: Start difference. First operand has 39 places, 36 transitions, 93 flow. Second operand 4 states and 101 transitions. [2024-06-14 11:18:10,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 46 transitions, 181 flow [2024-06-14 11:18:10,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 46 transitions, 178 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-14 11:18:10,586 INFO L231 Difference]: Finished difference. Result has 42 places, 38 transitions, 117 flow [2024-06-14 11:18:10,586 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=117, PETRI_PLACES=42, PETRI_TRANSITIONS=38} [2024-06-14 11:18:10,587 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 3 predicate places. [2024-06-14 11:18:10,587 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 38 transitions, 117 flow [2024-06-14 11:18:10,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 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 11:18:10,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:18:10,587 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:18:10,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-14 11:18:10,588 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 11:18:10,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:18:10,589 INFO L85 PathProgramCache]: Analyzing trace with hash 2015628212, now seen corresponding path program 1 times [2024-06-14 11:18:10,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:18:10,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655040949] [2024-06-14 11:18:10,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:18:10,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:18:10,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:18:10,784 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 11:18:10,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:18:10,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655040949] [2024-06-14 11:18:10,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655040949] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:18:10,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:18:10,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 11:18:10,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970567017] [2024-06-14 11:18:10,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:18:10,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 11:18:10,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:18:10,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 11:18:10,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 11:18:10,824 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 38 [2024-06-14 11:18:10,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 38 transitions, 117 flow. Second operand has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 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 11:18:10,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:18:10,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 38 [2024-06-14 11:18:10,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:18:10,891 INFO L124 PetriNetUnfolderBase]: 143/322 cut-off events. [2024-06-14 11:18:10,892 INFO L125 PetriNetUnfolderBase]: For 148/148 co-relation queries the response was YES. [2024-06-14 11:18:10,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 718 conditions, 322 events. 143/322 cut-off events. For 148/148 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1470 event pairs, 51 based on Foata normal form. 4/314 useless extension candidates. Maximal degree in co-relation 537. Up to 185 conditions per place. [2024-06-14 11:18:10,895 INFO L140 encePairwiseOnDemand]: 31/38 looper letters, 31 selfloop transitions, 8 changer transitions 0/53 dead transitions. [2024-06-14 11:18:10,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 53 transitions, 238 flow [2024-06-14 11:18:10,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:18:10,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:18:10,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 120 transitions. [2024-06-14 11:18:10,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.631578947368421 [2024-06-14 11:18:10,904 INFO L175 Difference]: Start difference. First operand has 42 places, 38 transitions, 117 flow. Second operand 5 states and 120 transitions. [2024-06-14 11:18:10,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 53 transitions, 238 flow [2024-06-14 11:18:10,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 53 transitions, 229 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-14 11:18:10,908 INFO L231 Difference]: Finished difference. Result has 45 places, 40 transitions, 141 flow [2024-06-14 11:18:10,908 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=141, PETRI_PLACES=45, PETRI_TRANSITIONS=40} [2024-06-14 11:18:10,909 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 6 predicate places. [2024-06-14 11:18:10,909 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 40 transitions, 141 flow [2024-06-14 11:18:10,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 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 11:18:10,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:18:10,910 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:18:10,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-14 11:18:10,910 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 11:18:10,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:18:10,911 INFO L85 PathProgramCache]: Analyzing trace with hash 88010942, now seen corresponding path program 1 times [2024-06-14 11:18:10,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:18:10,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367833333] [2024-06-14 11:18:10,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:18:10,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:18:10,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:18:11,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:18:11,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:18:11,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367833333] [2024-06-14 11:18:11,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367833333] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:18:11,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:18:11,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 11:18:11,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109903577] [2024-06-14 11:18:11,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:18:11,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 11:18:11,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:18:11,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 11:18:11,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-14 11:18:11,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 38 [2024-06-14 11:18:11,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 40 transitions, 141 flow. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 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 11:18:11,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:18:11,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 38 [2024-06-14 11:18:11,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:18:11,133 INFO L124 PetriNetUnfolderBase]: 125/295 cut-off events. [2024-06-14 11:18:11,134 INFO L125 PetriNetUnfolderBase]: For 250/250 co-relation queries the response was YES. [2024-06-14 11:18:11,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 712 conditions, 295 events. 125/295 cut-off events. For 250/250 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1320 event pairs, 46 based on Foata normal form. 1/284 useless extension candidates. Maximal degree in co-relation 580. Up to 200 conditions per place. [2024-06-14 11:18:11,137 INFO L140 encePairwiseOnDemand]: 33/38 looper letters, 26 selfloop transitions, 5 changer transitions 0/47 dead transitions. [2024-06-14 11:18:11,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 47 transitions, 221 flow [2024-06-14 11:18:11,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 11:18:11,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 11:18:11,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 97 transitions. [2024-06-14 11:18:11,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6381578947368421 [2024-06-14 11:18:11,139 INFO L175 Difference]: Start difference. First operand has 45 places, 40 transitions, 141 flow. Second operand 4 states and 97 transitions. [2024-06-14 11:18:11,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 47 transitions, 221 flow [2024-06-14 11:18:11,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 47 transitions, 209 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-14 11:18:11,142 INFO L231 Difference]: Finished difference. Result has 47 places, 42 transitions, 154 flow [2024-06-14 11:18:11,142 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=154, PETRI_PLACES=47, PETRI_TRANSITIONS=42} [2024-06-14 11:18:11,143 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 8 predicate places. [2024-06-14 11:18:11,144 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 42 transitions, 154 flow [2024-06-14 11:18:11,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 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 11:18:11,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:18:11,144 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:18:11,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-14 11:18:11,145 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 11:18:11,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:18:11,146 INFO L85 PathProgramCache]: Analyzing trace with hash -967459819, now seen corresponding path program 1 times [2024-06-14 11:18:11,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:18:11,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586350481] [2024-06-14 11:18:11,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:18:11,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:18:11,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:18:11,278 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 11:18:11,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:18:11,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586350481] [2024-06-14 11:18:11,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586350481] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:18:11,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:18:11,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 11:18:11,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371342380] [2024-06-14 11:18:11,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:18:11,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 11:18:11,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:18:11,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 11:18:11,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 11:18:11,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 38 [2024-06-14 11:18:11,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 42 transitions, 154 flow. Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 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 11:18:11,315 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:18:11,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 38 [2024-06-14 11:18:11,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:18:11,374 INFO L124 PetriNetUnfolderBase]: 143/317 cut-off events. [2024-06-14 11:18:11,374 INFO L125 PetriNetUnfolderBase]: For 370/385 co-relation queries the response was YES. [2024-06-14 11:18:11,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 823 conditions, 317 events. 143/317 cut-off events. For 370/385 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1372 event pairs, 54 based on Foata normal form. 3/308 useless extension candidates. Maximal degree in co-relation 678. Up to 220 conditions per place. [2024-06-14 11:18:11,377 INFO L140 encePairwiseOnDemand]: 32/38 looper letters, 32 selfloop transitions, 10 changer transitions 0/56 dead transitions. [2024-06-14 11:18:11,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 56 transitions, 286 flow [2024-06-14 11:18:11,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:18:11,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:18:11,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 119 transitions. [2024-06-14 11:18:11,379 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6263157894736842 [2024-06-14 11:18:11,379 INFO L175 Difference]: Start difference. First operand has 47 places, 42 transitions, 154 flow. Second operand 5 states and 119 transitions. [2024-06-14 11:18:11,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 56 transitions, 286 flow [2024-06-14 11:18:11,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 56 transitions, 277 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-14 11:18:11,383 INFO L231 Difference]: Finished difference. Result has 50 places, 46 transitions, 190 flow [2024-06-14 11:18:11,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=145, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=190, PETRI_PLACES=50, PETRI_TRANSITIONS=46} [2024-06-14 11:18:11,385 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 11 predicate places. [2024-06-14 11:18:11,387 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 46 transitions, 190 flow [2024-06-14 11:18:11,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 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 11:18:11,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:18:11,387 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:18:11,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-14 11:18:11,391 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 11:18:11,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:18:11,392 INFO L85 PathProgramCache]: Analyzing trace with hash -1213753405, now seen corresponding path program 2 times [2024-06-14 11:18:11,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:18:11,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816905248] [2024-06-14 11:18:11,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:18:11,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:18:11,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:18:11,471 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 11:18:11,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:18:11,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816905248] [2024-06-14 11:18:11,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816905248] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:18:11,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:18:11,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 11:18:11,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514830161] [2024-06-14 11:18:11,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:18:11,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 11:18:11,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:18:11,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 11:18:11,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 11:18:11,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 38 [2024-06-14 11:18:11,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 46 transitions, 190 flow. Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 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 11:18:11,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:18:11,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 38 [2024-06-14 11:18:11,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:18:11,557 INFO L124 PetriNetUnfolderBase]: 142/321 cut-off events. [2024-06-14 11:18:11,558 INFO L125 PetriNetUnfolderBase]: For 555/568 co-relation queries the response was YES. [2024-06-14 11:18:11,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 882 conditions, 321 events. 142/321 cut-off events. For 555/568 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1419 event pairs, 57 based on Foata normal form. 7/318 useless extension candidates. Maximal degree in co-relation 587. Up to 218 conditions per place. [2024-06-14 11:18:11,560 INFO L140 encePairwiseOnDemand]: 32/38 looper letters, 28 selfloop transitions, 10 changer transitions 0/52 dead transitions. [2024-06-14 11:18:11,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 52 transitions, 280 flow [2024-06-14 11:18:11,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:18:11,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:18:11,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 115 transitions. [2024-06-14 11:18:11,561 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6052631578947368 [2024-06-14 11:18:11,561 INFO L175 Difference]: Start difference. First operand has 50 places, 46 transitions, 190 flow. Second operand 5 states and 115 transitions. [2024-06-14 11:18:11,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 52 transitions, 280 flow [2024-06-14 11:18:11,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 52 transitions, 270 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-06-14 11:18:11,564 INFO L231 Difference]: Finished difference. Result has 54 places, 46 transitions, 205 flow [2024-06-14 11:18:11,564 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=205, PETRI_PLACES=54, PETRI_TRANSITIONS=46} [2024-06-14 11:18:11,566 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 15 predicate places. [2024-06-14 11:18:11,566 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 46 transitions, 205 flow [2024-06-14 11:18:11,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 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 11:18:11,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:18:11,566 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:18:11,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-14 11:18:11,567 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 11:18:11,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:18:11,567 INFO L85 PathProgramCache]: Analyzing trace with hash 1757601737, now seen corresponding path program 1 times [2024-06-14 11:18:11,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:18:11,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413464131] [2024-06-14 11:18:11,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:18:11,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:18:11,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:18:11,667 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 11:18:11,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:18:11,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413464131] [2024-06-14 11:18:11,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413464131] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:18:11,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:18:11,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:18:11,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622736566] [2024-06-14 11:18:11,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:18:11,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:18:11,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:18:11,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:18:11,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:18:11,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 38 [2024-06-14 11:18:11,718 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 46 transitions, 205 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 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 11:18:11,718 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:18:11,718 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 38 [2024-06-14 11:18:11,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:18:11,848 INFO L124 PetriNetUnfolderBase]: 195/457 cut-off events. [2024-06-14 11:18:11,848 INFO L125 PetriNetUnfolderBase]: For 900/914 co-relation queries the response was YES. [2024-06-14 11:18:11,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1201 conditions, 457 events. 195/457 cut-off events. For 900/914 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 2230 event pairs, 26 based on Foata normal form. 10/462 useless extension candidates. Maximal degree in co-relation 865. Up to 134 conditions per place. [2024-06-14 11:18:11,851 INFO L140 encePairwiseOnDemand]: 30/38 looper letters, 48 selfloop transitions, 12 changer transitions 2/75 dead transitions. [2024-06-14 11:18:11,851 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 75 transitions, 439 flow [2024-06-14 11:18:11,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:18:11,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:18:11,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-14 11:18:11,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.631578947368421 [2024-06-14 11:18:11,853 INFO L175 Difference]: Start difference. First operand has 54 places, 46 transitions, 205 flow. Second operand 6 states and 144 transitions. [2024-06-14 11:18:11,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 75 transitions, 439 flow [2024-06-14 11:18:11,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 75 transitions, 412 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-14 11:18:11,855 INFO L231 Difference]: Finished difference. Result has 58 places, 49 transitions, 235 flow [2024-06-14 11:18:11,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=235, PETRI_PLACES=58, PETRI_TRANSITIONS=49} [2024-06-14 11:18:11,856 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 19 predicate places. [2024-06-14 11:18:11,856 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 49 transitions, 235 flow [2024-06-14 11:18:11,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 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 11:18:11,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:18:11,857 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:18:11,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-14 11:18:11,857 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 11:18:11,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:18:11,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1026875080, now seen corresponding path program 1 times [2024-06-14 11:18:11,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:18:11,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069754830] [2024-06-14 11:18:11,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:18:11,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:18:11,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:18:11,936 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 11:18:11,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:18:11,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069754830] [2024-06-14 11:18:11,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069754830] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:18:11,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:18:11,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:18:11,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890578343] [2024-06-14 11:18:11,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:18:11,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:18:11,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:18:11,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:18:11,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:18:11,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 38 [2024-06-14 11:18:11,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 49 transitions, 235 flow. Second operand has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 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 11:18:11,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:18:11,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 38 [2024-06-14 11:18:11,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:18:12,045 INFO L124 PetriNetUnfolderBase]: 241/548 cut-off events. [2024-06-14 11:18:12,045 INFO L125 PetriNetUnfolderBase]: For 1492/1511 co-relation queries the response was YES. [2024-06-14 11:18:12,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1646 conditions, 548 events. 241/548 cut-off events. For 1492/1511 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2768 event pairs, 54 based on Foata normal form. 14/554 useless extension candidates. Maximal degree in co-relation 1213. Up to 178 conditions per place. [2024-06-14 11:18:12,048 INFO L140 encePairwiseOnDemand]: 29/38 looper letters, 43 selfloop transitions, 22 changer transitions 1/79 dead transitions. [2024-06-14 11:18:12,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 79 transitions, 511 flow [2024-06-14 11:18:12,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:18:12,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:18:12,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-14 11:18:12,052 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.631578947368421 [2024-06-14 11:18:12,052 INFO L175 Difference]: Start difference. First operand has 58 places, 49 transitions, 235 flow. Second operand 6 states and 144 transitions. [2024-06-14 11:18:12,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 79 transitions, 511 flow [2024-06-14 11:18:12,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 79 transitions, 501 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-06-14 11:18:12,056 INFO L231 Difference]: Finished difference. Result has 65 places, 59 transitions, 356 flow [2024-06-14 11:18:12,056 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=356, PETRI_PLACES=65, PETRI_TRANSITIONS=59} [2024-06-14 11:18:12,058 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 26 predicate places. [2024-06-14 11:18:12,059 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 59 transitions, 356 flow [2024-06-14 11:18:12,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 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 11:18:12,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:18:12,059 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:18:12,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-14 11:18:12,059 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 11:18:12,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:18:12,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1964784294, now seen corresponding path program 2 times [2024-06-14 11:18:12,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:18:12,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733673239] [2024-06-14 11:18:12,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:18:12,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:18:12,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:18:12,143 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 11:18:12,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:18:12,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733673239] [2024-06-14 11:18:12,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733673239] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:18:12,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:18:12,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:18:12,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892677770] [2024-06-14 11:18:12,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:18:12,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:18:12,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:18:12,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:18:12,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:18:12,174 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 38 [2024-06-14 11:18:12,175 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 59 transitions, 356 flow. Second operand has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 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 11:18:12,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:18:12,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 38 [2024-06-14 11:18:12,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:18:12,260 INFO L124 PetriNetUnfolderBase]: 271/624 cut-off events. [2024-06-14 11:18:12,260 INFO L125 PetriNetUnfolderBase]: For 2385/2412 co-relation queries the response was YES. [2024-06-14 11:18:12,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2082 conditions, 624 events. 271/624 cut-off events. For 2385/2412 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 3324 event pairs, 59 based on Foata normal form. 20/632 useless extension candidates. Maximal degree in co-relation 1609. Up to 185 conditions per place. [2024-06-14 11:18:12,266 INFO L140 encePairwiseOnDemand]: 29/38 looper letters, 44 selfloop transitions, 24 changer transitions 1/82 dead transitions. [2024-06-14 11:18:12,266 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 82 transitions, 640 flow [2024-06-14 11:18:12,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:18:12,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:18:12,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-06-14 11:18:12,267 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6228070175438597 [2024-06-14 11:18:12,267 INFO L175 Difference]: Start difference. First operand has 65 places, 59 transitions, 356 flow. Second operand 6 states and 142 transitions. [2024-06-14 11:18:12,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 82 transitions, 640 flow [2024-06-14 11:18:12,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 82 transitions, 626 flow, removed 7 selfloop flow, removed 0 redundant places. [2024-06-14 11:18:12,273 INFO L231 Difference]: Finished difference. Result has 71 places, 64 transitions, 439 flow [2024-06-14 11:18:12,273 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=346, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=439, PETRI_PLACES=71, PETRI_TRANSITIONS=64} [2024-06-14 11:18:12,274 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 32 predicate places. [2024-06-14 11:18:12,274 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 64 transitions, 439 flow [2024-06-14 11:18:12,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 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 11:18:12,274 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:18:12,274 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:18:12,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-14 11:18:12,275 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 11:18:12,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:18:12,275 INFO L85 PathProgramCache]: Analyzing trace with hash -192236666, now seen corresponding path program 3 times [2024-06-14 11:18:12,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:18:12,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581711872] [2024-06-14 11:18:12,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:18:12,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:18:12,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:18:12,358 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 11:18:12,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:18:12,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581711872] [2024-06-14 11:18:12,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581711872] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:18:12,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:18:12,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:18:12,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973743278] [2024-06-14 11:18:12,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:18:12,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:18:12,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:18:12,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:18:12,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:18:12,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 38 [2024-06-14 11:18:12,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 64 transitions, 439 flow. Second operand has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 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 11:18:12,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:18:12,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 38 [2024-06-14 11:18:12,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:18:12,460 INFO L124 PetriNetUnfolderBase]: 265/619 cut-off events. [2024-06-14 11:18:12,460 INFO L125 PetriNetUnfolderBase]: For 2930/2959 co-relation queries the response was YES. [2024-06-14 11:18:12,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2132 conditions, 619 events. 265/619 cut-off events. For 2930/2959 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 3280 event pairs, 46 based on Foata normal form. 12/623 useless extension candidates. Maximal degree in co-relation 1502. Up to 160 conditions per place. [2024-06-14 11:18:12,465 INFO L140 encePairwiseOnDemand]: 29/38 looper letters, 44 selfloop transitions, 21 changer transitions 2/80 dead transitions. [2024-06-14 11:18:12,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 80 transitions, 675 flow [2024-06-14 11:18:12,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:18:12,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:18:12,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-06-14 11:18:12,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.618421052631579 [2024-06-14 11:18:12,466 INFO L175 Difference]: Start difference. First operand has 71 places, 64 transitions, 439 flow. Second operand 6 states and 141 transitions. [2024-06-14 11:18:12,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 80 transitions, 675 flow [2024-06-14 11:18:12,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 80 transitions, 643 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-14 11:18:12,471 INFO L231 Difference]: Finished difference. Result has 75 places, 64 transitions, 455 flow [2024-06-14 11:18:12,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=407, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=455, PETRI_PLACES=75, PETRI_TRANSITIONS=64} [2024-06-14 11:18:12,472 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 36 predicate places. [2024-06-14 11:18:12,473 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 64 transitions, 455 flow [2024-06-14 11:18:12,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 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 11:18:12,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:18:12,473 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:18:12,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-14 11:18:12,473 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 11:18:12,474 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:18:12,474 INFO L85 PathProgramCache]: Analyzing trace with hash -1075714408, now seen corresponding path program 1 times [2024-06-14 11:18:12,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:18:12,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194318931] [2024-06-14 11:18:12,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:18:12,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:18:12,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:18:12,550 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 11:18:12,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:18:12,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194318931] [2024-06-14 11:18:12,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194318931] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:18:12,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:18:12,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:18:12,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053266293] [2024-06-14 11:18:12,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:18:12,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:18:12,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:18:12,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:18:12,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:18:12,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 38 [2024-06-14 11:18:12,584 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 64 transitions, 455 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 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 11:18:12,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:18:12,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 38 [2024-06-14 11:18:12,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:18:12,657 INFO L124 PetriNetUnfolderBase]: 259/606 cut-off events. [2024-06-14 11:18:12,657 INFO L125 PetriNetUnfolderBase]: For 3100/3123 co-relation queries the response was YES. [2024-06-14 11:18:12,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2128 conditions, 606 events. 259/606 cut-off events. For 3100/3123 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 3214 event pairs, 59 based on Foata normal form. 18/616 useless extension candidates. Maximal degree in co-relation 1616. Up to 182 conditions per place. [2024-06-14 11:18:12,662 INFO L140 encePairwiseOnDemand]: 29/38 looper letters, 42 selfloop transitions, 26 changer transitions 1/82 dead transitions. [2024-06-14 11:18:12,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 82 transitions, 699 flow [2024-06-14 11:18:12,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:18:12,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:18:12,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-06-14 11:18:12,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.618421052631579 [2024-06-14 11:18:12,663 INFO L175 Difference]: Start difference. First operand has 75 places, 64 transitions, 455 flow. Second operand 6 states and 141 transitions. [2024-06-14 11:18:12,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 82 transitions, 699 flow [2024-06-14 11:18:12,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 82 transitions, 646 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-14 11:18:12,669 INFO L231 Difference]: Finished difference. Result has 78 places, 66 transitions, 494 flow [2024-06-14 11:18:12,669 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=403, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=494, PETRI_PLACES=78, PETRI_TRANSITIONS=66} [2024-06-14 11:18:12,670 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 39 predicate places. [2024-06-14 11:18:12,670 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 66 transitions, 494 flow [2024-06-14 11:18:12,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 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 11:18:12,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:18:12,670 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:18:12,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-14 11:18:12,671 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 11:18:12,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:18:12,671 INFO L85 PathProgramCache]: Analyzing trace with hash -1664368100, now seen corresponding path program 2 times [2024-06-14 11:18:12,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:18:12,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310660731] [2024-06-14 11:18:12,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:18:12,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:18:12,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:18:12,749 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 11:18:12,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:18:12,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310660731] [2024-06-14 11:18:12,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310660731] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:18:12,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:18:12,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:18:12,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826388263] [2024-06-14 11:18:12,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:18:12,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:18:12,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:18:12,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:18:12,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:18:12,775 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 38 [2024-06-14 11:18:12,776 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 66 transitions, 494 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 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 11:18:12,776 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:18:12,776 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 38 [2024-06-14 11:18:12,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:18:12,853 INFO L124 PetriNetUnfolderBase]: 260/612 cut-off events. [2024-06-14 11:18:12,853 INFO L125 PetriNetUnfolderBase]: For 3536/3557 co-relation queries the response was YES. [2024-06-14 11:18:12,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2200 conditions, 612 events. 260/612 cut-off events. For 3536/3557 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 3211 event pairs, 54 based on Foata normal form. 10/618 useless extension candidates. Maximal degree in co-relation 1567. Up to 160 conditions per place. [2024-06-14 11:18:12,857 INFO L140 encePairwiseOnDemand]: 29/38 looper letters, 45 selfloop transitions, 23 changer transitions 2/83 dead transitions. [2024-06-14 11:18:12,857 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 83 transitions, 747 flow [2024-06-14 11:18:12,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:18:12,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:18:12,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 140 transitions. [2024-06-14 11:18:12,858 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6140350877192983 [2024-06-14 11:18:12,859 INFO L175 Difference]: Start difference. First operand has 78 places, 66 transitions, 494 flow. Second operand 6 states and 140 transitions. [2024-06-14 11:18:12,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 83 transitions, 747 flow [2024-06-14 11:18:12,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 83 transitions, 679 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-14 11:18:12,865 INFO L231 Difference]: Finished difference. Result has 80 places, 69 transitions, 520 flow [2024-06-14 11:18:12,865 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=430, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=520, PETRI_PLACES=80, PETRI_TRANSITIONS=69} [2024-06-14 11:18:12,865 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 41 predicate places. [2024-06-14 11:18:12,865 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 69 transitions, 520 flow [2024-06-14 11:18:12,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 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 11:18:12,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:18:12,866 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:18:12,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-14 11:18:12,866 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 11:18:12,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:18:12,866 INFO L85 PathProgramCache]: Analyzing trace with hash -590652925, now seen corresponding path program 1 times [2024-06-14 11:18:12,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:18:12,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373414823] [2024-06-14 11:18:12,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:18:12,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:18:12,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:18:12,936 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 11:18:12,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:18:12,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373414823] [2024-06-14 11:18:12,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373414823] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:18:12,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:18:12,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:18:12,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186849476] [2024-06-14 11:18:12,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:18:12,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:18:12,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:18:12,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:18:12,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:18:12,970 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 38 [2024-06-14 11:18:12,971 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 69 transitions, 520 flow. Second operand has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 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 11:18:12,971 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:18:12,971 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 38 [2024-06-14 11:18:12,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:18:13,060 INFO L124 PetriNetUnfolderBase]: 285/681 cut-off events. [2024-06-14 11:18:13,061 INFO L125 PetriNetUnfolderBase]: For 4345/4364 co-relation queries the response was YES. [2024-06-14 11:18:13,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2447 conditions, 681 events. 285/681 cut-off events. For 4345/4364 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 3858 event pairs, 83 based on Foata normal form. 11/688 useless extension candidates. Maximal degree in co-relation 1904. Up to 213 conditions per place. [2024-06-14 11:18:13,065 INFO L140 encePairwiseOnDemand]: 30/38 looper letters, 56 selfloop transitions, 21 changer transitions 2/92 dead transitions. [2024-06-14 11:18:13,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 92 transitions, 837 flow [2024-06-14 11:18:13,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:18:13,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:18:13,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 138 transitions. [2024-06-14 11:18:13,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6052631578947368 [2024-06-14 11:18:13,066 INFO L175 Difference]: Start difference. First operand has 80 places, 69 transitions, 520 flow. Second operand 6 states and 138 transitions. [2024-06-14 11:18:13,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 92 transitions, 837 flow [2024-06-14 11:18:13,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 92 transitions, 788 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-14 11:18:13,073 INFO L231 Difference]: Finished difference. Result has 84 places, 74 transitions, 577 flow [2024-06-14 11:18:13,073 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=475, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=577, PETRI_PLACES=84, PETRI_TRANSITIONS=74} [2024-06-14 11:18:13,074 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 45 predicate places. [2024-06-14 11:18:13,074 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 74 transitions, 577 flow [2024-06-14 11:18:13,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 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 11:18:13,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:18:13,074 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:18:13,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-14 11:18:13,075 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 11:18:13,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:18:13,075 INFO L85 PathProgramCache]: Analyzing trace with hash 968445057, now seen corresponding path program 1 times [2024-06-14 11:18:13,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:18:13,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162132332] [2024-06-14 11:18:13,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:18:13,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:18:13,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:18:13,161 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 11:18:13,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:18:13,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162132332] [2024-06-14 11:18:13,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162132332] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:18:13,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:18:13,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:18:13,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034786451] [2024-06-14 11:18:13,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:18:13,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:18:13,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:18:13,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:18:13,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:18:13,196 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 38 [2024-06-14 11:18:13,197 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 74 transitions, 577 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 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 11:18:13,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:18:13,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 38 [2024-06-14 11:18:13,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:18:13,288 INFO L124 PetriNetUnfolderBase]: 306/735 cut-off events. [2024-06-14 11:18:13,288 INFO L125 PetriNetUnfolderBase]: For 5523/5543 co-relation queries the response was YES. [2024-06-14 11:18:13,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2731 conditions, 735 events. 306/735 cut-off events. For 5523/5543 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 4258 event pairs, 39 based on Foata normal form. 16/744 useless extension candidates. Maximal degree in co-relation 2543. Up to 211 conditions per place. [2024-06-14 11:18:13,293 INFO L140 encePairwiseOnDemand]: 31/38 looper letters, 62 selfloop transitions, 22 changer transitions 2/99 dead transitions. [2024-06-14 11:18:13,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 99 transitions, 914 flow [2024-06-14 11:18:13,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:18:13,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:18:13,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-06-14 11:18:13,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6228070175438597 [2024-06-14 11:18:13,294 INFO L175 Difference]: Start difference. First operand has 84 places, 74 transitions, 577 flow. Second operand 6 states and 142 transitions. [2024-06-14 11:18:13,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 99 transitions, 914 flow [2024-06-14 11:18:13,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 99 transitions, 883 flow, removed 8 selfloop flow, removed 1 redundant places. [2024-06-14 11:18:13,302 INFO L231 Difference]: Finished difference. Result has 92 places, 77 transitions, 659 flow [2024-06-14 11:18:13,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=552, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=659, PETRI_PLACES=92, PETRI_TRANSITIONS=77} [2024-06-14 11:18:13,303 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 53 predicate places. [2024-06-14 11:18:13,303 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 77 transitions, 659 flow [2024-06-14 11:18:13,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 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 11:18:13,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:18:13,303 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 11:18:13,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-14 11:18:13,304 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 11:18:13,304 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:18:13,304 INFO L85 PathProgramCache]: Analyzing trace with hash -207594140, now seen corresponding path program 1 times [2024-06-14 11:18:13,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:18:13,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358825856] [2024-06-14 11:18:13,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:18:13,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:18:13,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:18:13,350 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 11:18:13,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:18:13,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358825856] [2024-06-14 11:18:13,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358825856] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:18:13,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:18:13,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:18:13,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984166077] [2024-06-14 11:18:13,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:18:13,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:18:13,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:18:13,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:18:13,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:18:13,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 38 [2024-06-14 11:18:13,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 77 transitions, 659 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 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 11:18:13,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:18:13,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 38 [2024-06-14 11:18:13,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:18:13,567 INFO L124 PetriNetUnfolderBase]: 521/1095 cut-off events. [2024-06-14 11:18:13,567 INFO L125 PetriNetUnfolderBase]: For 5825/5831 co-relation queries the response was YES. [2024-06-14 11:18:13,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3832 conditions, 1095 events. 521/1095 cut-off events. For 5825/5831 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 6468 event pairs, 153 based on Foata normal form. 34/1105 useless extension candidates. Maximal degree in co-relation 3275. Up to 357 conditions per place. [2024-06-14 11:18:13,575 INFO L140 encePairwiseOnDemand]: 28/38 looper letters, 63 selfloop transitions, 41 changer transitions 4/125 dead transitions. [2024-06-14 11:18:13,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 125 transitions, 1076 flow [2024-06-14 11:18:13,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:18:13,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:18:13,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 217 transitions. [2024-06-14 11:18:13,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5710526315789474 [2024-06-14 11:18:13,576 INFO L175 Difference]: Start difference. First operand has 92 places, 77 transitions, 659 flow. Second operand 10 states and 217 transitions. [2024-06-14 11:18:13,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 125 transitions, 1076 flow [2024-06-14 11:18:13,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 125 transitions, 996 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-14 11:18:13,589 INFO L231 Difference]: Finished difference. Result has 105 places, 92 transitions, 869 flow [2024-06-14 11:18:13,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=563, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=869, PETRI_PLACES=105, PETRI_TRANSITIONS=92} [2024-06-14 11:18:13,590 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 66 predicate places. [2024-06-14 11:18:13,590 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 92 transitions, 869 flow [2024-06-14 11:18:13,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 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 11:18:13,590 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:18:13,591 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 11:18:13,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-14 11:18:13,591 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 11:18:13,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:18:13,591 INFO L85 PathProgramCache]: Analyzing trace with hash -273088864, now seen corresponding path program 2 times [2024-06-14 11:18:13,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:18:13,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548063311] [2024-06-14 11:18:13,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:18:13,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:18:13,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:18:13,671 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 11:18:13,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:18:13,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548063311] [2024-06-14 11:18:13,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548063311] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:18:13,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:18:13,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:18:13,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125794673] [2024-06-14 11:18:13,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:18:13,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:18:13,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:18:13,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:18:13,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:18:13,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 38 [2024-06-14 11:18:13,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 92 transitions, 869 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 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 11:18:13,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:18:13,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 38 [2024-06-14 11:18:13,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:18:13,819 INFO L124 PetriNetUnfolderBase]: 380/910 cut-off events. [2024-06-14 11:18:13,819 INFO L125 PetriNetUnfolderBase]: For 8827/8861 co-relation queries the response was YES. [2024-06-14 11:18:13,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4086 conditions, 910 events. 380/910 cut-off events. For 8827/8861 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 5658 event pairs, 103 based on Foata normal form. 9/904 useless extension candidates. Maximal degree in co-relation 3267. Up to 258 conditions per place. [2024-06-14 11:18:13,826 INFO L140 encePairwiseOnDemand]: 31/38 looper letters, 57 selfloop transitions, 32 changer transitions 0/111 dead transitions. [2024-06-14 11:18:13,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 111 transitions, 1246 flow [2024-06-14 11:18:13,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:18:13,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:18:13,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 134 transitions. [2024-06-14 11:18:13,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5877192982456141 [2024-06-14 11:18:13,827 INFO L175 Difference]: Start difference. First operand has 105 places, 92 transitions, 869 flow. Second operand 6 states and 134 transitions. [2024-06-14 11:18:13,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 111 transitions, 1246 flow [2024-06-14 11:18:13,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 111 transitions, 1246 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-06-14 11:18:13,848 INFO L231 Difference]: Finished difference. Result has 111 places, 97 transitions, 989 flow [2024-06-14 11:18:13,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=869, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=989, PETRI_PLACES=111, PETRI_TRANSITIONS=97} [2024-06-14 11:18:13,849 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 72 predicate places. [2024-06-14 11:18:13,849 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 97 transitions, 989 flow [2024-06-14 11:18:13,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 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 11:18:13,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:18:13,850 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 11:18:13,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-14 11:18:13,850 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 11:18:13,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:18:13,850 INFO L85 PathProgramCache]: Analyzing trace with hash -681728894, now seen corresponding path program 3 times [2024-06-14 11:18:13,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:18:13,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318439573] [2024-06-14 11:18:13,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:18:13,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:18:13,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:18:13,927 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 11:18:13,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:18:13,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318439573] [2024-06-14 11:18:13,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318439573] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:18:13,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:18:13,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:18:13,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645693267] [2024-06-14 11:18:13,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:18:13,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:18:13,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:18:13,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:18:13,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:18:13,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 38 [2024-06-14 11:18:13,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 97 transitions, 989 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 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 11:18:13,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:18:13,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 38 [2024-06-14 11:18:13,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:18:14,052 INFO L124 PetriNetUnfolderBase]: 378/907 cut-off events. [2024-06-14 11:18:14,052 INFO L125 PetriNetUnfolderBase]: For 9944/9978 co-relation queries the response was YES. [2024-06-14 11:18:14,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4253 conditions, 907 events. 378/907 cut-off events. For 9944/9978 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 5658 event pairs, 98 based on Foata normal form. 5/897 useless extension candidates. Maximal degree in co-relation 3430. Up to 257 conditions per place. [2024-06-14 11:18:14,059 INFO L140 encePairwiseOnDemand]: 31/38 looper letters, 56 selfloop transitions, 34 changer transitions 0/112 dead transitions. [2024-06-14 11:18:14,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 112 transitions, 1334 flow [2024-06-14 11:18:14,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:18:14,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:18:14,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 134 transitions. [2024-06-14 11:18:14,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5877192982456141 [2024-06-14 11:18:14,061 INFO L175 Difference]: Start difference. First operand has 111 places, 97 transitions, 989 flow. Second operand 6 states and 134 transitions. [2024-06-14 11:18:14,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 112 transitions, 1334 flow [2024-06-14 11:18:14,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 112 transitions, 1290 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-14 11:18:14,100 INFO L231 Difference]: Finished difference. Result has 116 places, 98 transitions, 1056 flow [2024-06-14 11:18:14,101 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=945, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1056, PETRI_PLACES=116, PETRI_TRANSITIONS=98} [2024-06-14 11:18:14,101 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 77 predicate places. [2024-06-14 11:18:14,102 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 98 transitions, 1056 flow [2024-06-14 11:18:14,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 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 11:18:14,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:18:14,102 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 11:18:14,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-14 11:18:14,103 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 11:18:14,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:18:14,103 INFO L85 PathProgramCache]: Analyzing trace with hash 1380998671, now seen corresponding path program 1 times [2024-06-14 11:18:14,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:18:14,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804279455] [2024-06-14 11:18:14,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:18:14,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:18:14,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:18:14,174 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 11:18:14,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:18:14,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804279455] [2024-06-14 11:18:14,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804279455] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:18:14,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:18:14,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:18:14,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408886271] [2024-06-14 11:18:14,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:18:14,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:18:14,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:18:14,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:18:14,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:18:14,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 38 [2024-06-14 11:18:14,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 98 transitions, 1056 flow. Second operand has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 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 11:18:14,207 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:18:14,207 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 38 [2024-06-14 11:18:14,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:18:14,330 INFO L124 PetriNetUnfolderBase]: 374/892 cut-off events. [2024-06-14 11:18:14,330 INFO L125 PetriNetUnfolderBase]: For 11645/11691 co-relation queries the response was YES. [2024-06-14 11:18:14,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4333 conditions, 892 events. 374/892 cut-off events. For 11645/11691 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 5485 event pairs, 80 based on Foata normal form. 14/883 useless extension candidates. Maximal degree in co-relation 3742. Up to 255 conditions per place. [2024-06-14 11:18:14,338 INFO L140 encePairwiseOnDemand]: 31/38 looper letters, 69 selfloop transitions, 37 changer transitions 0/128 dead transitions. [2024-06-14 11:18:14,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 128 transitions, 1507 flow [2024-06-14 11:18:14,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:18:14,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:18:14,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-14 11:18:14,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6491228070175439 [2024-06-14 11:18:14,339 INFO L175 Difference]: Start difference. First operand has 116 places, 98 transitions, 1056 flow. Second operand 6 states and 148 transitions. [2024-06-14 11:18:14,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 128 transitions, 1507 flow [2024-06-14 11:18:14,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 128 transitions, 1460 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-14 11:18:14,362 INFO L231 Difference]: Finished difference. Result has 122 places, 104 transitions, 1214 flow [2024-06-14 11:18:14,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=1016, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1214, PETRI_PLACES=122, PETRI_TRANSITIONS=104} [2024-06-14 11:18:14,363 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 83 predicate places. [2024-06-14 11:18:14,363 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 104 transitions, 1214 flow [2024-06-14 11:18:14,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 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 11:18:14,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:18:14,363 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 11:18:14,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-14 11:18:14,363 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 11:18:14,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:18:14,364 INFO L85 PathProgramCache]: Analyzing trace with hash 956332567, now seen corresponding path program 2 times [2024-06-14 11:18:14,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:18:14,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555426873] [2024-06-14 11:18:14,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:18:14,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:18:14,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:18:14,428 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 11:18:14,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:18:14,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555426873] [2024-06-14 11:18:14,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555426873] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:18:14,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:18:14,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:18:14,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277168024] [2024-06-14 11:18:14,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:18:14,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:18:14,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:18:14,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:18:14,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:18:14,459 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 38 [2024-06-14 11:18:14,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 104 transitions, 1214 flow. Second operand has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 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 11:18:14,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:18:14,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 38 [2024-06-14 11:18:14,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:18:14,594 INFO L124 PetriNetUnfolderBase]: 379/895 cut-off events. [2024-06-14 11:18:14,594 INFO L125 PetriNetUnfolderBase]: For 13571/13627 co-relation queries the response was YES. [2024-06-14 11:18:14,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4635 conditions, 895 events. 379/895 cut-off events. For 13571/13627 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 5502 event pairs, 85 based on Foata normal form. 18/888 useless extension candidates. Maximal degree in co-relation 4059. Up to 261 conditions per place. [2024-06-14 11:18:14,602 INFO L140 encePairwiseOnDemand]: 31/38 looper letters, 71 selfloop transitions, 33 changer transitions 0/126 dead transitions. [2024-06-14 11:18:14,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 126 transitions, 1585 flow [2024-06-14 11:18:14,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:18:14,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:18:14,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-06-14 11:18:14,603 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6228070175438597 [2024-06-14 11:18:14,603 INFO L175 Difference]: Start difference. First operand has 122 places, 104 transitions, 1214 flow. Second operand 6 states and 142 transitions. [2024-06-14 11:18:14,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 126 transitions, 1585 flow [2024-06-14 11:18:14,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 126 transitions, 1499 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-14 11:18:14,630 INFO L231 Difference]: Finished difference. Result has 125 places, 107 transitions, 1254 flow [2024-06-14 11:18:14,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=1136, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1254, PETRI_PLACES=125, PETRI_TRANSITIONS=107} [2024-06-14 11:18:14,630 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 86 predicate places. [2024-06-14 11:18:14,631 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 107 transitions, 1254 flow [2024-06-14 11:18:14,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 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 11:18:14,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:18:14,631 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 11:18:14,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-14 11:18:14,631 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 11:18:14,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:18:14,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1515985425, now seen corresponding path program 3 times [2024-06-14 11:18:14,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:18:14,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062261532] [2024-06-14 11:18:14,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:18:14,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:18:14,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:18:14,667 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 11:18:14,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:18:14,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062261532] [2024-06-14 11:18:14,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062261532] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:18:14,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:18:14,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:18:14,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084927059] [2024-06-14 11:18:14,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:18:14,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:18:14,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:18:14,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:18:14,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:18:14,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 38 [2024-06-14 11:18:14,698 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 107 transitions, 1254 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 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 11:18:14,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:18:14,698 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 38 [2024-06-14 11:18:14,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:18:14,882 INFO L124 PetriNetUnfolderBase]: 503/1121 cut-off events. [2024-06-14 11:18:14,883 INFO L125 PetriNetUnfolderBase]: For 12479/12503 co-relation queries the response was YES. [2024-06-14 11:18:14,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5258 conditions, 1121 events. 503/1121 cut-off events. For 12479/12503 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 7098 event pairs, 106 based on Foata normal form. 7/1071 useless extension candidates. Maximal degree in co-relation 5020. Up to 414 conditions per place. [2024-06-14 11:18:14,893 INFO L140 encePairwiseOnDemand]: 29/38 looper letters, 68 selfloop transitions, 40 changer transitions 0/148 dead transitions. [2024-06-14 11:18:14,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 148 transitions, 1678 flow [2024-06-14 11:18:14,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:18:14,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:18:14,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 179 transitions. [2024-06-14 11:18:14,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5888157894736842 [2024-06-14 11:18:14,895 INFO L175 Difference]: Start difference. First operand has 125 places, 107 transitions, 1254 flow. Second operand 8 states and 179 transitions. [2024-06-14 11:18:14,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 148 transitions, 1678 flow [2024-06-14 11:18:14,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 148 transitions, 1620 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-14 11:18:14,928 INFO L231 Difference]: Finished difference. Result has 134 places, 122 transitions, 1434 flow [2024-06-14 11:18:14,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=1206, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1434, PETRI_PLACES=134, PETRI_TRANSITIONS=122} [2024-06-14 11:18:14,928 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 95 predicate places. [2024-06-14 11:18:14,928 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 122 transitions, 1434 flow [2024-06-14 11:18:14,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 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 11:18:14,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:18:14,929 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 11:18:14,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-14 11:18:14,929 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 11:18:14,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:18:14,930 INFO L85 PathProgramCache]: Analyzing trace with hash 975585973, now seen corresponding path program 4 times [2024-06-14 11:18:14,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:18:14,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310853200] [2024-06-14 11:18:14,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:18:14,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:18:14,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:18:14,997 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 11:18:14,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:18:14,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310853200] [2024-06-14 11:18:14,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310853200] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:18:14,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:18:14,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:18:14,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169708249] [2024-06-14 11:18:14,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:18:14,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:18:14,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:18:14,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:18:14,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:18:15,038 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 38 [2024-06-14 11:18:15,038 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 122 transitions, 1434 flow. Second operand has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 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 11:18:15,038 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:18:15,038 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 38 [2024-06-14 11:18:15,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:18:15,184 INFO L124 PetriNetUnfolderBase]: 423/1003 cut-off events. [2024-06-14 11:18:15,185 INFO L125 PetriNetUnfolderBase]: For 15134/15188 co-relation queries the response was YES. [2024-06-14 11:18:15,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5273 conditions, 1003 events. 423/1003 cut-off events. For 15134/15188 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 6397 event pairs, 131 based on Foata normal form. 10/987 useless extension candidates. Maximal degree in co-relation 4875. Up to 339 conditions per place. [2024-06-14 11:18:15,193 INFO L140 encePairwiseOnDemand]: 32/38 looper letters, 70 selfloop transitions, 34 changer transitions 0/135 dead transitions. [2024-06-14 11:18:15,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 135 transitions, 1717 flow [2024-06-14 11:18:15,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:18:15,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:18:15,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 134 transitions. [2024-06-14 11:18:15,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5877192982456141 [2024-06-14 11:18:15,194 INFO L175 Difference]: Start difference. First operand has 134 places, 122 transitions, 1434 flow. Second operand 6 states and 134 transitions. [2024-06-14 11:18:15,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 135 transitions, 1717 flow [2024-06-14 11:18:15,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 135 transitions, 1717 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-06-14 11:18:15,224 INFO L231 Difference]: Finished difference. Result has 141 places, 123 transitions, 1532 flow [2024-06-14 11:18:15,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=1434, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1532, PETRI_PLACES=141, PETRI_TRANSITIONS=123} [2024-06-14 11:18:15,225 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 102 predicate places. [2024-06-14 11:18:15,225 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 123 transitions, 1532 flow [2024-06-14 11:18:15,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 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 11:18:15,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:18:15,226 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 11:18:15,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-14 11:18:15,226 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 11:18:15,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:18:15,226 INFO L85 PathProgramCache]: Analyzing trace with hash -356997899, now seen corresponding path program 5 times [2024-06-14 11:18:15,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:18:15,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717684243] [2024-06-14 11:18:15,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:18:15,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:18:15,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:18:15,265 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 11:18:15,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:18:15,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717684243] [2024-06-14 11:18:15,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717684243] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:18:15,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:18:15,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:18:15,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609250851] [2024-06-14 11:18:15,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:18:15,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:18:15,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:18:15,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:18:15,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:18:15,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 38 [2024-06-14 11:18:15,293 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 123 transitions, 1532 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 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 11:18:15,293 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:18:15,293 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 38 [2024-06-14 11:18:15,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:18:15,474 INFO L124 PetriNetUnfolderBase]: 436/1020 cut-off events. [2024-06-14 11:18:15,474 INFO L125 PetriNetUnfolderBase]: For 9602/9615 co-relation queries the response was YES. [2024-06-14 11:18:15,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4732 conditions, 1020 events. 436/1020 cut-off events. For 9602/9615 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 6424 event pairs, 112 based on Foata normal form. 27/1028 useless extension candidates. Maximal degree in co-relation 4303. Up to 245 conditions per place. [2024-06-14 11:18:15,482 INFO L140 encePairwiseOnDemand]: 28/38 looper letters, 71 selfloop transitions, 45 changer transitions 0/150 dead transitions. [2024-06-14 11:18:15,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 150 transitions, 1823 flow [2024-06-14 11:18:15,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:18:15,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:18:15,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 208 transitions. [2024-06-14 11:18:15,484 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5473684210526316 [2024-06-14 11:18:15,484 INFO L175 Difference]: Start difference. First operand has 141 places, 123 transitions, 1532 flow. Second operand 10 states and 208 transitions. [2024-06-14 11:18:15,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 150 transitions, 1823 flow [2024-06-14 11:18:15,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 150 transitions, 1711 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-14 11:18:15,519 INFO L231 Difference]: Finished difference. Result has 152 places, 124 transitions, 1557 flow [2024-06-14 11:18:15,519 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=1239, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1557, PETRI_PLACES=152, PETRI_TRANSITIONS=124} [2024-06-14 11:18:15,520 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 113 predicate places. [2024-06-14 11:18:15,520 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 124 transitions, 1557 flow [2024-06-14 11:18:15,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 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 11:18:15,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:18:15,520 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 11:18:15,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-14 11:18:15,520 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 11:18:15,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:18:15,521 INFO L85 PathProgramCache]: Analyzing trace with hash 746207533, now seen corresponding path program 1 times [2024-06-14 11:18:15,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:18:15,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911631154] [2024-06-14 11:18:15,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:18:15,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:18:15,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:18:15,579 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 11:18:15,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:18:15,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911631154] [2024-06-14 11:18:15,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911631154] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:18:15,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:18:15,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:18:15,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413508200] [2024-06-14 11:18:15,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:18:15,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:18:15,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:18:15,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:18:15,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:18:15,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 38 [2024-06-14 11:18:15,625 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 124 transitions, 1557 flow. Second operand has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 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 11:18:15,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:18:15,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 38 [2024-06-14 11:18:15,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:18:15,739 INFO L124 PetriNetUnfolderBase]: 362/931 cut-off events. [2024-06-14 11:18:15,739 INFO L125 PetriNetUnfolderBase]: For 13695/13735 co-relation queries the response was YES. [2024-06-14 11:18:15,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4926 conditions, 931 events. 362/931 cut-off events. For 13695/13735 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 6120 event pairs, 122 based on Foata normal form. 14/930 useless extension candidates. Maximal degree in co-relation 4505. Up to 271 conditions per place. [2024-06-14 11:18:15,746 INFO L140 encePairwiseOnDemand]: 30/38 looper letters, 66 selfloop transitions, 33 changer transitions 0/137 dead transitions. [2024-06-14 11:18:15,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 137 transitions, 1853 flow [2024-06-14 11:18:15,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:18:15,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:18:15,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 130 transitions. [2024-06-14 11:18:15,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5701754385964912 [2024-06-14 11:18:15,748 INFO L175 Difference]: Start difference. First operand has 152 places, 124 transitions, 1557 flow. Second operand 6 states and 130 transitions. [2024-06-14 11:18:15,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 137 transitions, 1853 flow [2024-06-14 11:18:15,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 137 transitions, 1796 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-14 11:18:15,784 INFO L231 Difference]: Finished difference. Result has 156 places, 127 transitions, 1608 flow [2024-06-14 11:18:15,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=1503, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1608, PETRI_PLACES=156, PETRI_TRANSITIONS=127} [2024-06-14 11:18:15,785 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 117 predicate places. [2024-06-14 11:18:15,785 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 127 transitions, 1608 flow [2024-06-14 11:18:15,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 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 11:18:15,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:18:15,785 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 11:18:15,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-14 11:18:15,785 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 11:18:15,786 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:18:15,786 INFO L85 PathProgramCache]: Analyzing trace with hash 955594087, now seen corresponding path program 2 times [2024-06-14 11:18:15,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:18:15,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289410748] [2024-06-14 11:18:15,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:18:15,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:18:15,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:18:15,843 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 11:18:15,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:18:15,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289410748] [2024-06-14 11:18:15,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289410748] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:18:15,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:18:15,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:18:15,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553463928] [2024-06-14 11:18:15,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:18:15,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:18:15,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:18:15,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:18:15,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:18:15,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 38 [2024-06-14 11:18:15,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 127 transitions, 1608 flow. Second operand has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 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 11:18:15,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:18:15,881 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 38 [2024-06-14 11:18:15,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:18:16,002 INFO L124 PetriNetUnfolderBase]: 368/938 cut-off events. [2024-06-14 11:18:16,002 INFO L125 PetriNetUnfolderBase]: For 14679/14727 co-relation queries the response was YES. [2024-06-14 11:18:16,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5036 conditions, 938 events. 368/938 cut-off events. For 14679/14727 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 6124 event pairs, 121 based on Foata normal form. 15/933 useless extension candidates. Maximal degree in co-relation 4627. Up to 272 conditions per place. [2024-06-14 11:18:16,009 INFO L140 encePairwiseOnDemand]: 30/38 looper letters, 61 selfloop transitions, 39 changer transitions 0/138 dead transitions. [2024-06-14 11:18:16,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 138 transitions, 1945 flow [2024-06-14 11:18:16,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:18:16,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:18:16,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 131 transitions. [2024-06-14 11:18:16,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5745614035087719 [2024-06-14 11:18:16,011 INFO L175 Difference]: Start difference. First operand has 156 places, 127 transitions, 1608 flow. Second operand 6 states and 131 transitions. [2024-06-14 11:18:16,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 138 transitions, 1945 flow [2024-06-14 11:18:16,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 138 transitions, 1896 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-14 11:18:16,053 INFO L231 Difference]: Finished difference. Result has 159 places, 130 transitions, 1676 flow [2024-06-14 11:18:16,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=1559, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1676, PETRI_PLACES=159, PETRI_TRANSITIONS=130} [2024-06-14 11:18:16,054 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 120 predicate places. [2024-06-14 11:18:16,054 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 130 transitions, 1676 flow [2024-06-14 11:18:16,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 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 11:18:16,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:18:16,054 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 11:18:16,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-14 11:18:16,054 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 11:18:16,055 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:18:16,055 INFO L85 PathProgramCache]: Analyzing trace with hash -1814789151, now seen corresponding path program 3 times [2024-06-14 11:18:16,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:18:16,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708376568] [2024-06-14 11:18:16,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:18:16,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:18:16,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:18:16,088 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 11:18:16,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:18:16,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708376568] [2024-06-14 11:18:16,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708376568] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:18:16,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:18:16,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:18:16,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218162289] [2024-06-14 11:18:16,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:18:16,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:18:16,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:18:16,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:18:16,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:18:16,119 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 38 [2024-06-14 11:18:16,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 130 transitions, 1676 flow. Second operand has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 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 11:18:16,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:18:16,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 38 [2024-06-14 11:18:16,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:18:16,321 INFO L124 PetriNetUnfolderBase]: 526/1175 cut-off events. [2024-06-14 11:18:16,321 INFO L125 PetriNetUnfolderBase]: For 12850/12879 co-relation queries the response was YES. [2024-06-14 11:18:16,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5844 conditions, 1175 events. 526/1175 cut-off events. For 12850/12879 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 7478 event pairs, 124 based on Foata normal form. 10/1159 useless extension candidates. Maximal degree in co-relation 5569. Up to 439 conditions per place. [2024-06-14 11:18:16,330 INFO L140 encePairwiseOnDemand]: 28/38 looper letters, 73 selfloop transitions, 51 changer transitions 0/170 dead transitions. [2024-06-14 11:18:16,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 170 transitions, 2137 flow [2024-06-14 11:18:16,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:18:16,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:18:16,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 177 transitions. [2024-06-14 11:18:16,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5822368421052632 [2024-06-14 11:18:16,331 INFO L175 Difference]: Start difference. First operand has 159 places, 130 transitions, 1676 flow. Second operand 8 states and 177 transitions. [2024-06-14 11:18:16,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 170 transitions, 2137 flow [2024-06-14 11:18:16,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 170 transitions, 2082 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-14 11:18:16,383 INFO L231 Difference]: Finished difference. Result has 170 places, 142 transitions, 1941 flow [2024-06-14 11:18:16,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=1624, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1941, PETRI_PLACES=170, PETRI_TRANSITIONS=142} [2024-06-14 11:18:16,383 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 131 predicate places. [2024-06-14 11:18:16,384 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 142 transitions, 1941 flow [2024-06-14 11:18:16,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 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 11:18:16,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:18:16,384 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 11:18:16,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-14 11:18:16,385 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 11:18:16,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:18:16,385 INFO L85 PathProgramCache]: Analyzing trace with hash 728752992, now seen corresponding path program 1 times [2024-06-14 11:18:16,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:18:16,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530464673] [2024-06-14 11:18:16,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:18:16,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:18:16,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:18:16,463 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 11:18:16,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:18:16,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530464673] [2024-06-14 11:18:16,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530464673] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:18:16,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:18:16,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:18:16,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819799704] [2024-06-14 11:18:16,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:18:16,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:18:16,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:18:16,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:18:16,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:18:16,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 38 [2024-06-14 11:18:16,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 142 transitions, 1941 flow. Second operand has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 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 11:18:16,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:18:16,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 38 [2024-06-14 11:18:16,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:18:16,615 INFO L124 PetriNetUnfolderBase]: 387/980 cut-off events. [2024-06-14 11:18:16,615 INFO L125 PetriNetUnfolderBase]: For 18509/18559 co-relation queries the response was YES. [2024-06-14 11:18:16,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5760 conditions, 980 events. 387/980 cut-off events. For 18509/18559 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 6527 event pairs, 90 based on Foata normal form. 8/965 useless extension candidates. Maximal degree in co-relation 5466. Up to 281 conditions per place. [2024-06-14 11:18:16,624 INFO L140 encePairwiseOnDemand]: 31/38 looper letters, 70 selfloop transitions, 41 changer transitions 0/159 dead transitions. [2024-06-14 11:18:16,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 159 transitions, 2300 flow [2024-06-14 11:18:16,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:18:16,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:18:16,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 139 transitions. [2024-06-14 11:18:16,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6096491228070176 [2024-06-14 11:18:16,625 INFO L175 Difference]: Start difference. First operand has 170 places, 142 transitions, 1941 flow. Second operand 6 states and 139 transitions. [2024-06-14 11:18:16,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 159 transitions, 2300 flow [2024-06-14 11:18:16,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 159 transitions, 2266 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-06-14 11:18:16,716 INFO L231 Difference]: Finished difference. Result has 175 places, 143 transitions, 2010 flow [2024-06-14 11:18:16,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=1908, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2010, PETRI_PLACES=175, PETRI_TRANSITIONS=143} [2024-06-14 11:18:16,718 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 136 predicate places. [2024-06-14 11:18:16,718 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 143 transitions, 2010 flow [2024-06-14 11:18:16,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 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 11:18:16,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:18:16,718 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 11:18:16,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-14 11:18:16,718 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 11:18:16,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:18:16,719 INFO L85 PathProgramCache]: Analyzing trace with hash 14369211, now seen corresponding path program 4 times [2024-06-14 11:18:16,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:18:16,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121536426] [2024-06-14 11:18:16,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:18:16,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:18:16,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:18:16,778 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 11:18:16,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:18:16,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121536426] [2024-06-14 11:18:16,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121536426] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:18:16,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:18:16,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:18:16,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315579036] [2024-06-14 11:18:16,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:18:16,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:18:16,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:18:16,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:18:16,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:18:16,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 38 [2024-06-14 11:18:16,810 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 143 transitions, 2010 flow. Second operand has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 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 11:18:16,810 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:18:16,810 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 38 [2024-06-14 11:18:16,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:18:16,932 INFO L124 PetriNetUnfolderBase]: 403/1021 cut-off events. [2024-06-14 11:18:16,933 INFO L125 PetriNetUnfolderBase]: For 19824/19866 co-relation queries the response was YES. [2024-06-14 11:18:16,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6057 conditions, 1021 events. 403/1021 cut-off events. For 19824/19866 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 6839 event pairs, 123 based on Foata normal form. 11/1012 useless extension candidates. Maximal degree in co-relation 5582. Up to 288 conditions per place. [2024-06-14 11:18:16,942 INFO L140 encePairwiseOnDemand]: 31/38 looper letters, 73 selfloop transitions, 33 changer transitions 0/154 dead transitions. [2024-06-14 11:18:16,942 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 154 transitions, 2370 flow [2024-06-14 11:18:16,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:18:16,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:18:16,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 130 transitions. [2024-06-14 11:18:16,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5701754385964912 [2024-06-14 11:18:16,943 INFO L175 Difference]: Start difference. First operand has 175 places, 143 transitions, 2010 flow. Second operand 6 states and 130 transitions. [2024-06-14 11:18:16,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 154 transitions, 2370 flow [2024-06-14 11:18:17,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 154 transitions, 2307 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-14 11:18:17,011 INFO L231 Difference]: Finished difference. Result has 178 places, 146 transitions, 2055 flow [2024-06-14 11:18:17,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=1947, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2055, PETRI_PLACES=178, PETRI_TRANSITIONS=146} [2024-06-14 11:18:17,011 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 139 predicate places. [2024-06-14 11:18:17,011 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 146 transitions, 2055 flow [2024-06-14 11:18:17,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 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 11:18:17,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:18:17,012 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 11:18:17,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-14 11:18:17,012 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 11:18:17,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:18:17,015 INFO L85 PathProgramCache]: Analyzing trace with hash -1332154496, now seen corresponding path program 2 times [2024-06-14 11:18:17,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:18:17,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665370719] [2024-06-14 11:18:17,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:18:17,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:18:17,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:18:17,077 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 11:18:17,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:18:17,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665370719] [2024-06-14 11:18:17,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665370719] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:18:17,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:18:17,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:18:17,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068207887] [2024-06-14 11:18:17,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:18:17,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:18:17,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:18:17,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:18:17,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:18:17,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 38 [2024-06-14 11:18:17,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 146 transitions, 2055 flow. Second operand has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 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 11:18:17,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:18:17,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 38 [2024-06-14 11:18:17,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:18:17,274 INFO L124 PetriNetUnfolderBase]: 397/998 cut-off events. [2024-06-14 11:18:17,275 INFO L125 PetriNetUnfolderBase]: For 20997/21045 co-relation queries the response was YES. [2024-06-14 11:18:17,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6013 conditions, 998 events. 397/998 cut-off events. For 20997/21045 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 6597 event pairs, 67 based on Foata normal form. 10/985 useless extension candidates. Maximal degree in co-relation 5608. Up to 291 conditions per place. [2024-06-14 11:18:17,283 INFO L140 encePairwiseOnDemand]: 31/38 looper letters, 69 selfloop transitions, 45 changer transitions 0/162 dead transitions. [2024-06-14 11:18:17,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 162 transitions, 2470 flow [2024-06-14 11:18:17,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:18:17,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:18:17,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 136 transitions. [2024-06-14 11:18:17,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5964912280701754 [2024-06-14 11:18:17,284 INFO L175 Difference]: Start difference. First operand has 178 places, 146 transitions, 2055 flow. Second operand 6 states and 136 transitions. [2024-06-14 11:18:17,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 162 transitions, 2470 flow [2024-06-14 11:18:17,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 162 transitions, 2409 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-14 11:18:17,338 INFO L231 Difference]: Finished difference. Result has 181 places, 147 transitions, 2105 flow [2024-06-14 11:18:17,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=1994, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2105, PETRI_PLACES=181, PETRI_TRANSITIONS=147} [2024-06-14 11:18:17,342 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 142 predicate places. [2024-06-14 11:18:17,342 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 147 transitions, 2105 flow [2024-06-14 11:18:17,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 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 11:18:17,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:18:17,343 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 11:18:17,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-14 11:18:17,343 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 11:18:17,343 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:18:17,343 INFO L85 PathProgramCache]: Analyzing trace with hash -191361824, now seen corresponding path program 3 times [2024-06-14 11:18:17,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:18:17,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822653049] [2024-06-14 11:18:17,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:18:17,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:18:17,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:18:17,401 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 11:18:17,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:18:17,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822653049] [2024-06-14 11:18:17,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822653049] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:18:17,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:18:17,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:18:17,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934205316] [2024-06-14 11:18:17,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:18:17,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:18:17,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:18:17,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:18:17,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:18:17,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 38 [2024-06-14 11:18:17,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 147 transitions, 2105 flow. Second operand has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 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 11:18:17,435 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:18:17,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 38 [2024-06-14 11:18:17,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:18:17,574 INFO L124 PetriNetUnfolderBase]: 399/1006 cut-off events. [2024-06-14 11:18:17,574 INFO L125 PetriNetUnfolderBase]: For 22082/22134 co-relation queries the response was YES. [2024-06-14 11:18:17,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6087 conditions, 1006 events. 399/1006 cut-off events. For 22082/22134 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 6689 event pairs, 66 based on Foata normal form. 10/993 useless extension candidates. Maximal degree in co-relation 5671. Up to 292 conditions per place. [2024-06-14 11:18:17,583 INFO L140 encePairwiseOnDemand]: 31/38 looper letters, 71 selfloop transitions, 42 changer transitions 0/161 dead transitions. [2024-06-14 11:18:17,583 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 161 transitions, 2457 flow [2024-06-14 11:18:17,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:18:17,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:18:17,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 135 transitions. [2024-06-14 11:18:17,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5921052631578947 [2024-06-14 11:18:17,584 INFO L175 Difference]: Start difference. First operand has 181 places, 147 transitions, 2105 flow. Second operand 6 states and 135 transitions. [2024-06-14 11:18:17,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 161 transitions, 2457 flow [2024-06-14 11:18:17,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 161 transitions, 2347 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-14 11:18:17,645 INFO L231 Difference]: Finished difference. Result has 183 places, 147 transitions, 2083 flow [2024-06-14 11:18:17,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=1995, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2083, PETRI_PLACES=183, PETRI_TRANSITIONS=147} [2024-06-14 11:18:17,647 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 144 predicate places. [2024-06-14 11:18:17,647 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 147 transitions, 2083 flow [2024-06-14 11:18:17,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 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 11:18:17,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:18:17,647 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 11:18:17,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-14 11:18:17,647 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 11:18:17,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:18:17,648 INFO L85 PathProgramCache]: Analyzing trace with hash -191361669, now seen corresponding path program 5 times [2024-06-14 11:18:17,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:18:17,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354237912] [2024-06-14 11:18:17,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:18:17,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:18:17,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:18:17,714 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 11:18:17,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:18:17,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354237912] [2024-06-14 11:18:17,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354237912] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:18:17,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:18:17,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:18:17,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512922791] [2024-06-14 11:18:17,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:18:17,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:18:17,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:18:17,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:18:17,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:18:17,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 38 [2024-06-14 11:18:17,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 147 transitions, 2083 flow. Second operand has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 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 11:18:17,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:18:17,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 38 [2024-06-14 11:18:17,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:18:17,905 INFO L124 PetriNetUnfolderBase]: 405/1033 cut-off events. [2024-06-14 11:18:17,906 INFO L125 PetriNetUnfolderBase]: For 22335/22373 co-relation queries the response was YES. [2024-06-14 11:18:17,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6144 conditions, 1033 events. 405/1033 cut-off events. For 22335/22373 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 6968 event pairs, 113 based on Foata normal form. 17/1032 useless extension candidates. Maximal degree in co-relation 5666. Up to 287 conditions per place. [2024-06-14 11:18:17,917 INFO L140 encePairwiseOnDemand]: 32/38 looper letters, 75 selfloop transitions, 32 changer transitions 0/155 dead transitions. [2024-06-14 11:18:17,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 155 transitions, 2413 flow [2024-06-14 11:18:17,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:18:17,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:18:17,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 127 transitions. [2024-06-14 11:18:17,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5570175438596491 [2024-06-14 11:18:17,918 INFO L175 Difference]: Start difference. First operand has 183 places, 147 transitions, 2083 flow. Second operand 6 states and 127 transitions. [2024-06-14 11:18:17,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 155 transitions, 2413 flow [2024-06-14 11:18:17,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 155 transitions, 2287 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-14 11:18:17,982 INFO L231 Difference]: Finished difference. Result has 183 places, 147 transitions, 2027 flow [2024-06-14 11:18:17,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=1957, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2027, PETRI_PLACES=183, PETRI_TRANSITIONS=147} [2024-06-14 11:18:17,983 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 144 predicate places. [2024-06-14 11:18:17,983 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 147 transitions, 2027 flow [2024-06-14 11:18:17,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 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 11:18:17,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:18:17,983 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 11:18:17,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-14 11:18:17,984 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 11:18:17,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:18:17,984 INFO L85 PathProgramCache]: Analyzing trace with hash -138712909, now seen corresponding path program 1 times [2024-06-14 11:18:17,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:18:17,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603453334] [2024-06-14 11:18:17,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:18:17,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:18:17,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:18:18,035 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 11:18:18,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:18:18,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603453334] [2024-06-14 11:18:18,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603453334] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:18:18,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:18:18,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:18:18,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8608141] [2024-06-14 11:18:18,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:18:18,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:18:18,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:18:18,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:18:18,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:18:18,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 38 [2024-06-14 11:18:18,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 147 transitions, 2027 flow. Second operand has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 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 11:18:18,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:18:18,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 38 [2024-06-14 11:18:18,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:18:18,219 INFO L124 PetriNetUnfolderBase]: 404/1036 cut-off events. [2024-06-14 11:18:18,219 INFO L125 PetriNetUnfolderBase]: For 21427/21449 co-relation queries the response was YES. [2024-06-14 11:18:18,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6040 conditions, 1036 events. 404/1036 cut-off events. For 21427/21449 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 6975 event pairs, 52 based on Foata normal form. 10/1034 useless extension candidates. Maximal degree in co-relation 5560. Up to 215 conditions per place. [2024-06-14 11:18:18,228 INFO L140 encePairwiseOnDemand]: 30/38 looper letters, 82 selfloop transitions, 25 changer transitions 6/161 dead transitions. [2024-06-14 11:18:18,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 161 transitions, 2387 flow [2024-06-14 11:18:18,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:18:18,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:18:18,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 134 transitions. [2024-06-14 11:18:18,230 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5877192982456141 [2024-06-14 11:18:18,230 INFO L175 Difference]: Start difference. First operand has 183 places, 147 transitions, 2027 flow. Second operand 6 states and 134 transitions. [2024-06-14 11:18:18,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 161 transitions, 2387 flow [2024-06-14 11:18:18,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 161 transitions, 2270 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-14 11:18:18,296 INFO L231 Difference]: Finished difference. Result has 182 places, 143 transitions, 1889 flow [2024-06-14 11:18:18,296 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=1910, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1889, PETRI_PLACES=182, PETRI_TRANSITIONS=143} [2024-06-14 11:18:18,297 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 143 predicate places. [2024-06-14 11:18:18,297 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 143 transitions, 1889 flow [2024-06-14 11:18:18,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 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 11:18:18,297 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:18:18,297 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 11:18:18,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-14 11:18:18,297 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 11:18:18,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:18:18,298 INFO L85 PathProgramCache]: Analyzing trace with hash -1649750197, now seen corresponding path program 2 times [2024-06-14 11:18:18,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:18:18,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188446699] [2024-06-14 11:18:18,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:18:18,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:18:18,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:18:18,356 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 11:18:18,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:18:18,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188446699] [2024-06-14 11:18:18,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188446699] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:18:18,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:18:18,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:18:18,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189708741] [2024-06-14 11:18:18,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:18:18,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:18:18,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:18:18,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:18:18,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:18:18,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 38 [2024-06-14 11:18:18,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 143 transitions, 1889 flow. Second operand has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 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 11:18:18,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:18:18,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 38 [2024-06-14 11:18:18,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:18:18,519 INFO L124 PetriNetUnfolderBase]: 373/957 cut-off events. [2024-06-14 11:18:18,520 INFO L125 PetriNetUnfolderBase]: For 21003/21022 co-relation queries the response was YES. [2024-06-14 11:18:18,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5573 conditions, 957 events. 373/957 cut-off events. For 21003/21022 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 6286 event pairs, 41 based on Foata normal form. 10/954 useless extension candidates. Maximal degree in co-relation 5103. Up to 201 conditions per place. [2024-06-14 11:18:18,529 INFO L140 encePairwiseOnDemand]: 31/38 looper letters, 81 selfloop transitions, 24 changer transitions 0/153 dead transitions. [2024-06-14 11:18:18,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 153 transitions, 2227 flow [2024-06-14 11:18:18,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:18:18,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:18:18,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 130 transitions. [2024-06-14 11:18:18,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5701754385964912 [2024-06-14 11:18:18,531 INFO L175 Difference]: Start difference. First operand has 182 places, 143 transitions, 1889 flow. Second operand 6 states and 130 transitions. [2024-06-14 11:18:18,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 153 transitions, 2227 flow [2024-06-14 11:18:18,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 153 transitions, 2152 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-14 11:18:18,588 INFO L231 Difference]: Finished difference. Result has 178 places, 143 transitions, 1875 flow [2024-06-14 11:18:18,589 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=1822, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1875, PETRI_PLACES=178, PETRI_TRANSITIONS=143} [2024-06-14 11:18:18,590 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 139 predicate places. [2024-06-14 11:18:18,590 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 143 transitions, 1875 flow [2024-06-14 11:18:18,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 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 11:18:18,590 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:18:18,590 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 11:18:18,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-14 11:18:18,590 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 11:18:18,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:18:18,591 INFO L85 PathProgramCache]: Analyzing trace with hash 176239031, now seen corresponding path program 3 times [2024-06-14 11:18:18,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:18:18,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74193132] [2024-06-14 11:18:18,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:18:18,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:18:18,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:18:18,643 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 11:18:18,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:18:18,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74193132] [2024-06-14 11:18:18,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74193132] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:18:18,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:18:18,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:18:18,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160032995] [2024-06-14 11:18:18,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:18:18,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:18:18,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:18:18,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:18:18,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:18:18,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 38 [2024-06-14 11:18:18,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 143 transitions, 1875 flow. Second operand has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 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 11:18:18,677 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:18:18,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 38 [2024-06-14 11:18:18,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:18:18,797 INFO L124 PetriNetUnfolderBase]: 367/943 cut-off events. [2024-06-14 11:18:18,797 INFO L125 PetriNetUnfolderBase]: For 19124/19140 co-relation queries the response was YES. [2024-06-14 11:18:18,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5281 conditions, 943 events. 367/943 cut-off events. For 19124/19140 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 6180 event pairs, 41 based on Foata normal form. 16/947 useless extension candidates. Maximal degree in co-relation 4874. Up to 199 conditions per place. [2024-06-14 11:18:18,806 INFO L140 encePairwiseOnDemand]: 30/38 looper letters, 58 selfloop transitions, 47 changer transitions 0/153 dead transitions. [2024-06-14 11:18:18,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 153 transitions, 2157 flow [2024-06-14 11:18:18,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:18:18,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:18:18,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 133 transitions. [2024-06-14 11:18:18,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-14 11:18:18,807 INFO L175 Difference]: Start difference. First operand has 178 places, 143 transitions, 1875 flow. Second operand 6 states and 133 transitions. [2024-06-14 11:18:18,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 153 transitions, 2157 flow [2024-06-14 11:18:18,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 153 transitions, 2050 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-14 11:18:18,856 INFO L231 Difference]: Finished difference. Result has 176 places, 143 transitions, 1871 flow [2024-06-14 11:18:18,857 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=1768, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1871, PETRI_PLACES=176, PETRI_TRANSITIONS=143} [2024-06-14 11:18:18,857 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 137 predicate places. [2024-06-14 11:18:18,857 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 143 transitions, 1871 flow [2024-06-14 11:18:18,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 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 11:18:18,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:18:18,858 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 11:18:18,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-14 11:18:18,858 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 11:18:18,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:18:18,858 INFO L85 PathProgramCache]: Analyzing trace with hash -485946505, now seen corresponding path program 1 times [2024-06-14 11:18:18,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:18:18,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529547835] [2024-06-14 11:18:18,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:18:18,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:18:18,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:18:18,913 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 11:18:18,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:18:18,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529547835] [2024-06-14 11:18:18,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529547835] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:18:18,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:18:18,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:18:18,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721553116] [2024-06-14 11:18:18,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:18:18,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:18:18,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:18:18,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:18:18,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:18:18,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 38 [2024-06-14 11:18:18,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 143 transitions, 1871 flow. Second operand has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 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 11:18:18,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:18:18,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 38 [2024-06-14 11:18:18,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:18:19,099 INFO L124 PetriNetUnfolderBase]: 377/982 cut-off events. [2024-06-14 11:18:19,100 INFO L125 PetriNetUnfolderBase]: For 20253/20268 co-relation queries the response was YES. [2024-06-14 11:18:19,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5397 conditions, 982 events. 377/982 cut-off events. For 20253/20268 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 6621 event pairs, 79 based on Foata normal form. 16/987 useless extension candidates. Maximal degree in co-relation 5163. Up to 198 conditions per place. [2024-06-14 11:18:19,107 INFO L140 encePairwiseOnDemand]: 30/38 looper letters, 55 selfloop transitions, 55 changer transitions 0/158 dead transitions. [2024-06-14 11:18:19,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 158 transitions, 2193 flow [2024-06-14 11:18:19,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:18:19,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:18:19,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 136 transitions. [2024-06-14 11:18:19,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5964912280701754 [2024-06-14 11:18:19,108 INFO L175 Difference]: Start difference. First operand has 176 places, 143 transitions, 1871 flow. Second operand 6 states and 136 transitions. [2024-06-14 11:18:19,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 158 transitions, 2193 flow [2024-06-14 11:18:19,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 158 transitions, 2098 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-14 11:18:19,165 INFO L231 Difference]: Finished difference. Result has 177 places, 144 transitions, 1913 flow [2024-06-14 11:18:19,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=1778, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1913, PETRI_PLACES=177, PETRI_TRANSITIONS=144} [2024-06-14 11:18:19,166 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 138 predicate places. [2024-06-14 11:18:19,166 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 144 transitions, 1913 flow [2024-06-14 11:18:19,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 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 11:18:19,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:18:19,167 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 11:18:19,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-14 11:18:19,167 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 11:18:19,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:18:19,167 INFO L85 PathProgramCache]: Analyzing trace with hash -1493352477, now seen corresponding path program 2 times [2024-06-14 11:18:19,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:18:19,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797127706] [2024-06-14 11:18:19,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:18:19,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:18:19,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:18:19,218 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 11:18:19,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:18:19,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797127706] [2024-06-14 11:18:19,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797127706] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:18:19,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:18:19,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:18:19,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777879766] [2024-06-14 11:18:19,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:18:19,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:18:19,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:18:19,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:18:19,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:18:19,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 38 [2024-06-14 11:18:19,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 144 transitions, 1913 flow. Second operand has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 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 11:18:19,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:18:19,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 38 [2024-06-14 11:18:19,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:18:19,369 INFO L124 PetriNetUnfolderBase]: 398/1049 cut-off events. [2024-06-14 11:18:19,369 INFO L125 PetriNetUnfolderBase]: For 22268/22288 co-relation queries the response was YES. [2024-06-14 11:18:19,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5761 conditions, 1049 events. 398/1049 cut-off events. For 22268/22288 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 7287 event pairs, 77 based on Foata normal form. 16/1050 useless extension candidates. Maximal degree in co-relation 5521. Up to 279 conditions per place. [2024-06-14 11:18:19,379 INFO L140 encePairwiseOnDemand]: 31/38 looper letters, 84 selfloop transitions, 27 changer transitions 0/159 dead transitions. [2024-06-14 11:18:19,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 159 transitions, 2303 flow [2024-06-14 11:18:19,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:18:19,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:18:19,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 133 transitions. [2024-06-14 11:18:19,379 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-14 11:18:19,379 INFO L175 Difference]: Start difference. First operand has 177 places, 144 transitions, 1913 flow. Second operand 6 states and 133 transitions. [2024-06-14 11:18:19,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 159 transitions, 2303 flow [2024-06-14 11:18:19,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 159 transitions, 2196 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-14 11:18:19,445 INFO L231 Difference]: Finished difference. Result has 180 places, 146 transitions, 1904 flow [2024-06-14 11:18:19,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=1806, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1904, PETRI_PLACES=180, PETRI_TRANSITIONS=146} [2024-06-14 11:18:19,445 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 141 predicate places. [2024-06-14 11:18:19,445 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 146 transitions, 1904 flow [2024-06-14 11:18:19,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 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 11:18:19,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:18:19,445 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 11:18:19,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-14 11:18:19,446 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 11:18:19,446 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:18:19,446 INFO L85 PathProgramCache]: Analyzing trace with hash -497747477, now seen corresponding path program 3 times [2024-06-14 11:18:19,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:18:19,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258346954] [2024-06-14 11:18:19,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:18:19,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:18:19,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:18:19,496 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 11:18:19,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:18:19,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258346954] [2024-06-14 11:18:19,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258346954] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:18:19,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:18:19,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:18:19,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707234832] [2024-06-14 11:18:19,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:18:19,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:18:19,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:18:19,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:18:19,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:18:19,526 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 38 [2024-06-14 11:18:19,526 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 146 transitions, 1904 flow. Second operand has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 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 11:18:19,526 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:18:19,526 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 38 [2024-06-14 11:18:19,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:18:19,683 INFO L124 PetriNetUnfolderBase]: 390/1031 cut-off events. [2024-06-14 11:18:19,683 INFO L125 PetriNetUnfolderBase]: For 19409/19432 co-relation queries the response was YES. [2024-06-14 11:18:19,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5612 conditions, 1031 events. 390/1031 cut-off events. For 19409/19432 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 7132 event pairs, 77 based on Foata normal form. 10/1028 useless extension candidates. Maximal degree in co-relation 5373. Up to 276 conditions per place. [2024-06-14 11:18:19,690 INFO L140 encePairwiseOnDemand]: 31/38 looper letters, 76 selfloop transitions, 33 changer transitions 0/157 dead transitions. [2024-06-14 11:18:19,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 157 transitions, 2204 flow [2024-06-14 11:18:19,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:18:19,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:18:19,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 130 transitions. [2024-06-14 11:18:19,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5701754385964912 [2024-06-14 11:18:19,691 INFO L175 Difference]: Start difference. First operand has 180 places, 146 transitions, 1904 flow. Second operand 6 states and 130 transitions. [2024-06-14 11:18:19,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 157 transitions, 2204 flow [2024-06-14 11:18:19,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 157 transitions, 2154 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-14 11:18:19,754 INFO L231 Difference]: Finished difference. Result has 183 places, 146 transitions, 1924 flow [2024-06-14 11:18:19,755 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=1854, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1924, PETRI_PLACES=183, PETRI_TRANSITIONS=146} [2024-06-14 11:18:19,755 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 144 predicate places. [2024-06-14 11:18:19,755 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 146 transitions, 1924 flow [2024-06-14 11:18:19,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 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 11:18:19,755 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:18:19,755 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 11:18:19,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-14 11:18:19,755 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 11:18:19,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:18:19,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1640044167, now seen corresponding path program 4 times [2024-06-14 11:18:19,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:18:19,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082297492] [2024-06-14 11:18:19,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:18:19,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:18:19,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:18:19,806 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 11:18:19,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:18:19,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082297492] [2024-06-14 11:18:19,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082297492] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:18:19,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:18:19,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:18:19,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066192071] [2024-06-14 11:18:19,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:18:19,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:18:19,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:18:19,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:18:19,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:18:19,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 38 [2024-06-14 11:18:19,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 146 transitions, 1924 flow. Second operand has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 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 11:18:19,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:18:19,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 38 [2024-06-14 11:18:19,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:18:19,951 INFO L124 PetriNetUnfolderBase]: 395/1048 cut-off events. [2024-06-14 11:18:19,951 INFO L125 PetriNetUnfolderBase]: For 20483/20509 co-relation queries the response was YES. [2024-06-14 11:18:19,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5730 conditions, 1048 events. 395/1048 cut-off events. For 20483/20509 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 7254 event pairs, 95 based on Foata normal form. 10/1040 useless extension candidates. Maximal degree in co-relation 5330. Up to 328 conditions per place. [2024-06-14 11:18:19,959 INFO L140 encePairwiseOnDemand]: 32/38 looper letters, 79 selfloop transitions, 31 changer transitions 0/158 dead transitions. [2024-06-14 11:18:19,959 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 158 transitions, 2300 flow [2024-06-14 11:18:19,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:18:19,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:18:19,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 128 transitions. [2024-06-14 11:18:19,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5614035087719298 [2024-06-14 11:18:19,960 INFO L175 Difference]: Start difference. First operand has 183 places, 146 transitions, 1924 flow. Second operand 6 states and 128 transitions. [2024-06-14 11:18:19,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 158 transitions, 2300 flow [2024-06-14 11:18:20,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 158 transitions, 2230 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-14 11:18:20,030 INFO L231 Difference]: Finished difference. Result has 184 places, 147 transitions, 1934 flow [2024-06-14 11:18:20,030 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=1854, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1934, PETRI_PLACES=184, PETRI_TRANSITIONS=147} [2024-06-14 11:18:20,031 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 145 predicate places. [2024-06-14 11:18:20,031 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 147 transitions, 1934 flow [2024-06-14 11:18:20,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 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 11:18:20,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:18:20,031 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 11:18:20,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-14 11:18:20,031 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 11:18:20,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:18:20,031 INFO L85 PathProgramCache]: Analyzing trace with hash -1637247657, now seen corresponding path program 5 times [2024-06-14 11:18:20,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:18:20,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913570731] [2024-06-14 11:18:20,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:18:20,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:18:20,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:18:20,083 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 11:18:20,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:18:20,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913570731] [2024-06-14 11:18:20,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913570731] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:18:20,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:18:20,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:18:20,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010804415] [2024-06-14 11:18:20,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:18:20,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:18:20,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:18:20,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:18:20,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:18:20,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 38 [2024-06-14 11:18:20,112 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 147 transitions, 1934 flow. Second operand has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 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 11:18:20,112 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:18:20,112 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 38 [2024-06-14 11:18:20,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:18:20,233 INFO L124 PetriNetUnfolderBase]: 397/1056 cut-off events. [2024-06-14 11:18:20,233 INFO L125 PetriNetUnfolderBase]: For 20221/20245 co-relation queries the response was YES. [2024-06-14 11:18:20,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5722 conditions, 1056 events. 397/1056 cut-off events. For 20221/20245 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 7369 event pairs, 95 based on Foata normal form. 8/1048 useless extension candidates. Maximal degree in co-relation 5329. Up to 327 conditions per place. [2024-06-14 11:18:20,241 INFO L140 encePairwiseOnDemand]: 32/38 looper letters, 91 selfloop transitions, 19 changer transitions 0/158 dead transitions. [2024-06-14 11:18:20,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 158 transitions, 2300 flow [2024-06-14 11:18:20,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:18:20,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:18:20,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 130 transitions. [2024-06-14 11:18:20,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5701754385964912 [2024-06-14 11:18:20,242 INFO L175 Difference]: Start difference. First operand has 184 places, 147 transitions, 1934 flow. Second operand 6 states and 130 transitions. [2024-06-14 11:18:20,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 158 transitions, 2300 flow [2024-06-14 11:18:20,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 158 transitions, 2237 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-14 11:18:20,329 INFO L231 Difference]: Finished difference. Result has 185 places, 147 transitions, 1913 flow [2024-06-14 11:18:20,329 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=1871, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1913, PETRI_PLACES=185, PETRI_TRANSITIONS=147} [2024-06-14 11:18:20,329 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 146 predicate places. [2024-06-14 11:18:20,329 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 147 transitions, 1913 flow [2024-06-14 11:18:20,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 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 11:18:20,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:18:20,330 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 11:18:20,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-14 11:18:20,330 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 11:18:20,330 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:18:20,330 INFO L85 PathProgramCache]: Analyzing trace with hash -1637243007, now seen corresponding path program 6 times [2024-06-14 11:18:20,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:18:20,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360242053] [2024-06-14 11:18:20,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:18:20,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:18:20,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:18:20,380 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 11:18:20,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:18:20,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360242053] [2024-06-14 11:18:20,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360242053] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:18:20,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:18:20,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:18:20,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416247866] [2024-06-14 11:18:20,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:18:20,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:18:20,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:18:20,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:18:20,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:18:20,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 38 [2024-06-14 11:18:20,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 147 transitions, 1913 flow. Second operand has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 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 11:18:20,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:18:20,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 38 [2024-06-14 11:18:20,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:18:20,549 INFO L124 PetriNetUnfolderBase]: 391/1042 cut-off events. [2024-06-14 11:18:20,549 INFO L125 PetriNetUnfolderBase]: For 19910/19928 co-relation queries the response was YES. [2024-06-14 11:18:20,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5407 conditions, 1042 events. 391/1042 cut-off events. For 19910/19928 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 7236 event pairs, 91 based on Foata normal form. 14/1041 useless extension candidates. Maximal degree in co-relation 5015. Up to 325 conditions per place. [2024-06-14 11:18:20,558 INFO L140 encePairwiseOnDemand]: 32/38 looper letters, 89 selfloop transitions, 20 changer transitions 0/157 dead transitions. [2024-06-14 11:18:20,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 157 transitions, 2215 flow [2024-06-14 11:18:20,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:18:20,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:18:20,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 128 transitions. [2024-06-14 11:18:20,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5614035087719298 [2024-06-14 11:18:20,559 INFO L175 Difference]: Start difference. First operand has 185 places, 147 transitions, 1913 flow. Second operand 6 states and 128 transitions. [2024-06-14 11:18:20,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 157 transitions, 2215 flow [2024-06-14 11:18:20,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 157 transitions, 2138 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-14 11:18:20,622 INFO L231 Difference]: Finished difference. Result has 185 places, 147 transitions, 1882 flow [2024-06-14 11:18:20,622 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=1836, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1882, PETRI_PLACES=185, PETRI_TRANSITIONS=147} [2024-06-14 11:18:20,622 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 146 predicate places. [2024-06-14 11:18:20,622 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 147 transitions, 1882 flow [2024-06-14 11:18:20,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 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 11:18:20,623 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:18:20,623 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:18:20,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-14 11:18:20,623 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 11:18:20,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:18:20,623 INFO L85 PathProgramCache]: Analyzing trace with hash 2012710222, now seen corresponding path program 1 times [2024-06-14 11:18:20,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:18:20,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017213334] [2024-06-14 11:18:20,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:18:20,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:18:20,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:18:20,679 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 11:18:20,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:18:20,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017213334] [2024-06-14 11:18:20,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017213334] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:18:20,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:18:20,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:18:20,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823300548] [2024-06-14 11:18:20,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:18:20,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:18:20,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:18:20,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:18:20,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:18:20,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 38 [2024-06-14 11:18:20,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 147 transitions, 1882 flow. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 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 11:18:20,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:18:20,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 38 [2024-06-14 11:18:20,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:18:20,829 INFO L124 PetriNetUnfolderBase]: 382/1030 cut-off events. [2024-06-14 11:18:20,829 INFO L125 PetriNetUnfolderBase]: For 16001/16016 co-relation queries the response was YES. [2024-06-14 11:18:20,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5213 conditions, 1030 events. 382/1030 cut-off events. For 16001/16016 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 7219 event pairs, 107 based on Foata normal form. 2/1016 useless extension candidates. Maximal degree in co-relation 4816. Up to 294 conditions per place. [2024-06-14 11:18:20,837 INFO L140 encePairwiseOnDemand]: 32/38 looper letters, 70 selfloop transitions, 27 changer transitions 10/155 dead transitions. [2024-06-14 11:18:20,837 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 155 transitions, 2178 flow [2024-06-14 11:18:20,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:18:20,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:18:20,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 127 transitions. [2024-06-14 11:18:20,838 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5570175438596491 [2024-06-14 11:18:20,838 INFO L175 Difference]: Start difference. First operand has 185 places, 147 transitions, 1882 flow. Second operand 6 states and 127 transitions. [2024-06-14 11:18:20,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 155 transitions, 2178 flow [2024-06-14 11:18:20,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 155 transitions, 2136 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-14 11:18:20,913 INFO L231 Difference]: Finished difference. Result has 186 places, 141 transitions, 1814 flow [2024-06-14 11:18:20,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=1840, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1814, PETRI_PLACES=186, PETRI_TRANSITIONS=141} [2024-06-14 11:18:20,914 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 147 predicate places. [2024-06-14 11:18:20,914 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 141 transitions, 1814 flow [2024-06-14 11:18:20,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 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 11:18:20,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:18:20,914 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:18:20,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-14 11:18:20,914 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 11:18:20,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:18:20,914 INFO L85 PathProgramCache]: Analyzing trace with hash 1541714512, now seen corresponding path program 2 times [2024-06-14 11:18:20,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:18:20,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446727713] [2024-06-14 11:18:20,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:18:20,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:18:20,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:18:20,980 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 11:18:20,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:18:20,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446727713] [2024-06-14 11:18:20,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446727713] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:18:20,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:18:20,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:18:20,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402092631] [2024-06-14 11:18:20,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:18:20,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:18:20,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:18:20,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:18:20,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:18:21,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 38 [2024-06-14 11:18:21,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 141 transitions, 1814 flow. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 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 11:18:21,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:18:21,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 38 [2024-06-14 11:18:21,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:18:21,146 INFO L124 PetriNetUnfolderBase]: 351/957 cut-off events. [2024-06-14 11:18:21,147 INFO L125 PetriNetUnfolderBase]: For 15090/15105 co-relation queries the response was YES. [2024-06-14 11:18:21,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4866 conditions, 957 events. 351/957 cut-off events. For 15090/15105 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 6618 event pairs, 102 based on Foata normal form. 2/943 useless extension candidates. Maximal degree in co-relation 4508. Up to 276 conditions per place. [2024-06-14 11:18:21,156 INFO L140 encePairwiseOnDemand]: 31/38 looper letters, 44 selfloop transitions, 55 changer transitions 0/147 dead transitions. [2024-06-14 11:18:21,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 147 transitions, 2024 flow [2024-06-14 11:18:21,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:18:21,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:18:21,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 127 transitions. [2024-06-14 11:18:21,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5570175438596491 [2024-06-14 11:18:21,157 INFO L175 Difference]: Start difference. First operand has 186 places, 141 transitions, 1814 flow. Second operand 6 states and 127 transitions. [2024-06-14 11:18:21,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 147 transitions, 2024 flow [2024-06-14 11:18:21,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 147 transitions, 1910 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-06-14 11:18:21,212 INFO L231 Difference]: Finished difference. Result has 177 places, 141 transitions, 1814 flow [2024-06-14 11:18:21,212 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=1700, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1814, PETRI_PLACES=177, PETRI_TRANSITIONS=141} [2024-06-14 11:18:21,212 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 138 predicate places. [2024-06-14 11:18:21,212 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 141 transitions, 1814 flow [2024-06-14 11:18:21,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 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 11:18:21,213 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:18:21,213 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:18:21,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-14 11:18:21,213 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 11:18:21,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:18:21,213 INFO L85 PathProgramCache]: Analyzing trace with hash -596132417, now seen corresponding path program 1 times [2024-06-14 11:18:21,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:18:21,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140958628] [2024-06-14 11:18:21,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:18:21,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:18:21,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:18:21,270 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 11:18:21,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:18:21,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140958628] [2024-06-14 11:18:21,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140958628] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:18:21,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:18:21,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:18:21,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067074933] [2024-06-14 11:18:21,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:18:21,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:18:21,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:18:21,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:18:21,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:18:21,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 38 [2024-06-14 11:18:21,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 141 transitions, 1814 flow. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 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 11:18:21,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:18:21,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 38 [2024-06-14 11:18:21,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:18:21,439 INFO L124 PetriNetUnfolderBase]: 352/951 cut-off events. [2024-06-14 11:18:21,439 INFO L125 PetriNetUnfolderBase]: For 12686/12699 co-relation queries the response was YES. [2024-06-14 11:18:21,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4787 conditions, 951 events. 352/951 cut-off events. For 12686/12699 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 6486 event pairs, 50 based on Foata normal form. 2/943 useless extension candidates. Maximal degree in co-relation 4557. Up to 135 conditions per place. [2024-06-14 11:18:21,447 INFO L140 encePairwiseOnDemand]: 31/38 looper letters, 49 selfloop transitions, 59 changer transitions 0/156 dead transitions. [2024-06-14 11:18:21,447 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 156 transitions, 2126 flow [2024-06-14 11:18:21,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:18:21,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:18:21,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 137 transitions. [2024-06-14 11:18:21,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6008771929824561 [2024-06-14 11:18:21,448 INFO L175 Difference]: Start difference. First operand has 177 places, 141 transitions, 1814 flow. Second operand 6 states and 137 transitions. [2024-06-14 11:18:21,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 156 transitions, 2126 flow [2024-06-14 11:18:21,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 156 transitions, 1999 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-14 11:18:21,496 INFO L231 Difference]: Finished difference. Result has 176 places, 141 transitions, 1811 flow [2024-06-14 11:18:21,496 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=1687, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1811, PETRI_PLACES=176, PETRI_TRANSITIONS=141} [2024-06-14 11:18:21,496 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 137 predicate places. [2024-06-14 11:18:21,497 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 141 transitions, 1811 flow [2024-06-14 11:18:21,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 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 11:18:21,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:18:21,497 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:18:21,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-14 11:18:21,497 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 11:18:21,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:18:21,497 INFO L85 PathProgramCache]: Analyzing trace with hash 236410679, now seen corresponding path program 2 times [2024-06-14 11:18:21,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:18:21,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170113311] [2024-06-14 11:18:21,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:18:21,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:18:21,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:18:21,579 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 11:18:21,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:18:21,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170113311] [2024-06-14 11:18:21,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170113311] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:18:21,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:18:21,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:18:21,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643604666] [2024-06-14 11:18:21,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:18:21,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:18:21,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:18:21,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:18:21,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:18:21,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 38 [2024-06-14 11:18:21,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 141 transitions, 1811 flow. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 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 11:18:21,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:18:21,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 38 [2024-06-14 11:18:21,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:18:21,755 INFO L124 PetriNetUnfolderBase]: 361/972 cut-off events. [2024-06-14 11:18:21,755 INFO L125 PetriNetUnfolderBase]: For 13337/13352 co-relation queries the response was YES. [2024-06-14 11:18:21,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4896 conditions, 972 events. 361/972 cut-off events. For 13337/13352 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 6698 event pairs, 53 based on Foata normal form. 2/964 useless extension candidates. Maximal degree in co-relation 4659. Up to 215 conditions per place. [2024-06-14 11:18:21,762 INFO L140 encePairwiseOnDemand]: 32/38 looper letters, 69 selfloop transitions, 26 changer transitions 11/154 dead transitions. [2024-06-14 11:18:21,762 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 154 transitions, 2129 flow [2024-06-14 11:18:21,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:18:21,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:18:21,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 131 transitions. [2024-06-14 11:18:21,767 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5745614035087719 [2024-06-14 11:18:21,767 INFO L175 Difference]: Start difference. First operand has 176 places, 141 transitions, 1811 flow. Second operand 6 states and 131 transitions. [2024-06-14 11:18:21,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 154 transitions, 2129 flow [2024-06-14 11:18:21,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 154 transitions, 1949 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-14 11:18:21,818 INFO L231 Difference]: Finished difference. Result has 174 places, 135 transitions, 1624 flow [2024-06-14 11:18:21,818 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=1636, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1624, PETRI_PLACES=174, PETRI_TRANSITIONS=135} [2024-06-14 11:18:21,819 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 135 predicate places. [2024-06-14 11:18:21,819 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 135 transitions, 1624 flow [2024-06-14 11:18:21,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 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 11:18:21,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:18:21,820 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:18:21,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-14 11:18:21,820 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 11:18:21,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:18:21,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1403645461, now seen corresponding path program 3 times [2024-06-14 11:18:21,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:18:21,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032502318] [2024-06-14 11:18:21,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:18:21,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:18:21,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:18:21,885 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 11:18:21,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:18:21,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032502318] [2024-06-14 11:18:21,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032502318] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:18:21,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:18:21,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:18:21,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268046418] [2024-06-14 11:18:21,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:18:21,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:18:21,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:18:21,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:18:21,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:18:21,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 38 [2024-06-14 11:18:21,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 135 transitions, 1624 flow. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 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 11:18:21,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:18:21,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 38 [2024-06-14 11:18:21,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:18:22,024 INFO L124 PetriNetUnfolderBase]: 320/874 cut-off events. [2024-06-14 11:18:22,024 INFO L125 PetriNetUnfolderBase]: For 11154/11167 co-relation queries the response was YES. [2024-06-14 11:18:22,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4206 conditions, 874 events. 320/874 cut-off events. For 11154/11167 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 5928 event pairs, 62 based on Foata normal form. 2/864 useless extension candidates. Maximal degree in co-relation 3979. Up to 211 conditions per place. [2024-06-14 11:18:22,030 INFO L140 encePairwiseOnDemand]: 30/38 looper letters, 74 selfloop transitions, 22 changer transitions 8/152 dead transitions. [2024-06-14 11:18:22,030 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 152 transitions, 1872 flow [2024-06-14 11:18:22,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:18:22,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:18:22,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 136 transitions. [2024-06-14 11:18:22,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5964912280701754 [2024-06-14 11:18:22,031 INFO L175 Difference]: Start difference. First operand has 174 places, 135 transitions, 1624 flow. Second operand 6 states and 136 transitions. [2024-06-14 11:18:22,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 152 transitions, 1872 flow [2024-06-14 11:18:22,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 152 transitions, 1810 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-14 11:18:22,068 INFO L231 Difference]: Finished difference. Result has 166 places, 130 transitions, 1553 flow [2024-06-14 11:18:22,068 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=1562, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1553, PETRI_PLACES=166, PETRI_TRANSITIONS=130} [2024-06-14 11:18:22,069 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 127 predicate places. [2024-06-14 11:18:22,069 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 130 transitions, 1553 flow [2024-06-14 11:18:22,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 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 11:18:22,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:18:22,069 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:18:22,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-14 11:18:22,069 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 11:18:22,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:18:22,069 INFO L85 PathProgramCache]: Analyzing trace with hash -1479050676, now seen corresponding path program 1 times [2024-06-14 11:18:22,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:18:22,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382266610] [2024-06-14 11:18:22,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:18:22,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:18:22,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:18:22,123 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 11:18:22,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:18:22,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382266610] [2024-06-14 11:18:22,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382266610] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:18:22,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:18:22,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:18:22,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606059864] [2024-06-14 11:18:22,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:18:22,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:18:22,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:18:22,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:18:22,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:18:22,154 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 38 [2024-06-14 11:18:22,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 130 transitions, 1553 flow. Second operand has 6 states, 6 states have (on average 17.833333333333332) internal successors, (107), 6 states have internal predecessors, (107), 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 11:18:22,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:18:22,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 38 [2024-06-14 11:18:22,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:18:22,262 INFO L124 PetriNetUnfolderBase]: 291/790 cut-off events. [2024-06-14 11:18:22,262 INFO L125 PetriNetUnfolderBase]: For 8794/8807 co-relation queries the response was YES. [2024-06-14 11:18:22,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3771 conditions, 790 events. 291/790 cut-off events. For 8794/8807 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 5182 event pairs, 22 based on Foata normal form. 4/784 useless extension candidates. Maximal degree in co-relation 3578. Up to 213 conditions per place. [2024-06-14 11:18:22,269 INFO L140 encePairwiseOnDemand]: 30/38 looper letters, 40 selfloop transitions, 18 changer transitions 55/144 dead transitions. [2024-06-14 11:18:22,269 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 144 transitions, 1777 flow [2024-06-14 11:18:22,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:18:22,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:18:22,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 134 transitions. [2024-06-14 11:18:22,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5877192982456141 [2024-06-14 11:18:22,274 INFO L175 Difference]: Start difference. First operand has 166 places, 130 transitions, 1553 flow. Second operand 6 states and 134 transitions. [2024-06-14 11:18:22,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 144 transitions, 1777 flow [2024-06-14 11:18:22,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 144 transitions, 1713 flow, removed 6 selfloop flow, removed 12 redundant places. [2024-06-14 11:18:22,304 INFO L231 Difference]: Finished difference. Result has 156 places, 83 transitions, 896 flow [2024-06-14 11:18:22,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=1489, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=896, PETRI_PLACES=156, PETRI_TRANSITIONS=83} [2024-06-14 11:18:22,309 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 117 predicate places. [2024-06-14 11:18:22,309 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 83 transitions, 896 flow [2024-06-14 11:18:22,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.833333333333332) internal successors, (107), 6 states have internal predecessors, (107), 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 11:18:22,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:18:22,309 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:18:22,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-14 11:18:22,309 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 11:18:22,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:18:22,309 INFO L85 PathProgramCache]: Analyzing trace with hash -567285620, now seen corresponding path program 2 times [2024-06-14 11:18:22,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:18:22,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070217586] [2024-06-14 11:18:22,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:18:22,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:18:22,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:18:22,373 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 11:18:22,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:18:22,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070217586] [2024-06-14 11:18:22,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070217586] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:18:22,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:18:22,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:18:22,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963236104] [2024-06-14 11:18:22,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:18:22,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:18:22,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:18:22,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:18:22,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:18:22,398 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 38 [2024-06-14 11:18:22,399 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 83 transitions, 896 flow. Second operand has 6 states, 6 states have (on average 17.833333333333332) internal successors, (107), 6 states have internal predecessors, (107), 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 11:18:22,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:18:22,399 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 38 [2024-06-14 11:18:22,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:18:22,453 INFO L124 PetriNetUnfolderBase]: 161/449 cut-off events. [2024-06-14 11:18:22,453 INFO L125 PetriNetUnfolderBase]: For 4365/4377 co-relation queries the response was YES. [2024-06-14 11:18:22,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2012 conditions, 449 events. 161/449 cut-off events. For 4365/4377 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2528 event pairs, 18 based on Foata normal form. 4/446 useless extension candidates. Maximal degree in co-relation 1955. Up to 80 conditions per place. [2024-06-14 11:18:22,456 INFO L140 encePairwiseOnDemand]: 33/38 looper letters, 0 selfloop transitions, 0 changer transitions 88/88 dead transitions. [2024-06-14 11:18:22,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 88 transitions, 970 flow [2024-06-14 11:18:22,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:18:22,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:18:22,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 116 transitions. [2024-06-14 11:18:22,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5087719298245614 [2024-06-14 11:18:22,457 INFO L175 Difference]: Start difference. First operand has 156 places, 83 transitions, 896 flow. Second operand 6 states and 116 transitions. [2024-06-14 11:18:22,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 88 transitions, 970 flow [2024-06-14 11:18:22,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 88 transitions, 687 flow, removed 11 selfloop flow, removed 46 redundant places. [2024-06-14 11:18:22,465 INFO L231 Difference]: Finished difference. Result has 99 places, 0 transitions, 0 flow [2024-06-14 11:18:22,465 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=561, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=0, PETRI_PLACES=99, PETRI_TRANSITIONS=0} [2024-06-14 11:18:22,465 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 60 predicate places. [2024-06-14 11:18:22,465 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 0 transitions, 0 flow [2024-06-14 11:18:22,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.833333333333332) internal successors, (107), 6 states have internal predecessors, (107), 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 11:18:22,467 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 4 remaining) [2024-06-14 11:18:22,468 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 4 remaining) [2024-06-14 11:18:22,470 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2024-06-14 11:18:22,470 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2024-06-14 11:18:22,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-14 11:18:22,470 INFO L445 BasicCegarLoop]: Path program histogram: [6, 5, 5, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:18:22,472 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-06-14 11:18:22,473 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-06-14 11:18:22,475 INFO L507 ceAbstractionStarter]: Automizer considered 2 witness invariants [2024-06-14 11:18:22,475 INFO L508 ceAbstractionStarter]: WitnessConsidered=2 [2024-06-14 11:18:22,477 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.06 11:18:22 BasicIcfg [2024-06-14 11:18:22,477 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-06-14 11:18:22,477 INFO L158 Benchmark]: Toolchain (without parser) took 13774.83ms. Allocated memory was 184.5MB in the beginning and 578.8MB in the end (delta: 394.3MB). Free memory was 110.6MB in the beginning and 250.4MB in the end (delta: -139.8MB). Peak memory consumption was 256.8MB. Max. memory is 16.1GB. [2024-06-14 11:18:22,477 INFO L158 Benchmark]: Witness Parser took 0.15ms. Allocated memory is still 121.6MB. Free memory is still 86.2MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-14 11:18:22,477 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 184.5MB. Free memory is still 157.0MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-14 11:18:22,478 INFO L158 Benchmark]: CACSL2BoogieTranslator took 428.37ms. Allocated memory is still 184.5MB. Free memory was 110.4MB in the beginning and 143.5MB in the end (delta: -33.1MB). Peak memory consumption was 20.8MB. Max. memory is 16.1GB. [2024-06-14 11:18:22,478 INFO L158 Benchmark]: Boogie Procedure Inliner took 38.16ms. Allocated memory is still 184.5MB. Free memory was 143.5MB in the beginning and 141.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-14 11:18:22,478 INFO L158 Benchmark]: Boogie Preprocessor took 34.52ms. Allocated memory is still 184.5MB. Free memory was 141.4MB in the beginning and 139.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-14 11:18:22,478 INFO L158 Benchmark]: RCFGBuilder took 366.19ms. Allocated memory is still 184.5MB. Free memory was 139.3MB in the beginning and 119.0MB in the end (delta: 20.3MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. [2024-06-14 11:18:22,481 INFO L158 Benchmark]: TraceAbstraction took 12903.42ms. Allocated memory was 184.5MB in the beginning and 578.8MB in the end (delta: 394.3MB). Free memory was 117.6MB in the beginning and 250.4MB in the end (delta: -132.7MB). Peak memory consumption was 261.2MB. Max. memory is 16.1GB. [2024-06-14 11:18:22,482 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Witness Parser took 0.15ms. Allocated memory is still 121.6MB. Free memory is still 86.2MB. There was no memory consumed. Max. memory is 16.1GB. * CDTParser took 0.11ms. Allocated memory is still 184.5MB. Free memory is still 157.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 428.37ms. Allocated memory is still 184.5MB. Free memory was 110.4MB in the beginning and 143.5MB in the end (delta: -33.1MB). Peak memory consumption was 20.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 38.16ms. Allocated memory is still 184.5MB. Free memory was 143.5MB in the beginning and 141.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 34.52ms. Allocated memory is still 184.5MB. Free memory was 141.4MB in the beginning and 139.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 366.19ms. Allocated memory is still 184.5MB. Free memory was 139.3MB in the beginning and 119.0MB in the end (delta: 20.3MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. * TraceAbstraction took 12903.42ms. Allocated memory was 184.5MB in the beginning and 578.8MB in the end (delta: 394.3MB). Free memory was 117.6MB in the beginning and 250.4MB in the end (delta: -132.7MB). Peak memory consumption was 261.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 762]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 763]: 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, 61 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: 12.8s, OverallIterations: 46, TraceHistogramMax: 1, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.0s, AutomataDifference: 9.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 3565 SdHoareTripleChecker+Valid, 3.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2516 mSDsluCounter, 1377 SdHoareTripleChecker+Invalid, 2.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 965 mSDsCounter, 227 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 6043 IncrementalHoareTripleChecker+Invalid, 6270 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 227 mSolverCounterUnsat, 412 mSDtfsCounter, 6043 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 234 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2105occurred in iteration=28, InterpolantAutomatonStates: 278, 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, 3.0s InterpolantComputationTime, 788 NumberOfCodeBlocks, 788 NumberOfCodeBlocksAsserted, 46 NumberOfCheckSat, 742 ConstructedInterpolants, 0 QuantifiedInterpolants, 3022 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 46 InterpolantComputations, 46 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 11:18:22,505 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE