./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe022_tso.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/safe022_tso.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 76401ed0 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-wmm/safe022_tso.i ./goblint.2024-05-21_14-57-05.files/protection/safe022_tso.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-76401ed-m [2024-06-20 15:26:09,499 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-20 15:26:09,562 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-20 15:26:09,567 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-20 15:26:09,567 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-20 15:26:09,590 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-20 15:26:09,590 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-20 15:26:09,591 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-20 15:26:09,591 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-20 15:26:09,594 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-20 15:26:09,594 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-20 15:26:09,594 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-20 15:26:09,595 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-20 15:26:09,596 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-20 15:26:09,596 INFO L153 SettingsManager]: * Use SBE=true [2024-06-20 15:26:09,597 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-20 15:26:09,597 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-20 15:26:09,597 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-20 15:26:09,597 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-20 15:26:09,597 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-20 15:26:09,597 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-20 15:26:09,598 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-20 15:26:09,598 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-20 15:26:09,598 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-20 15:26:09,598 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-20 15:26:09,599 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-20 15:26:09,599 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-20 15:26:09,599 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-20 15:26:09,599 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-20 15:26:09,600 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-20 15:26:09,600 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-20 15:26:09,600 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-20 15:26:09,601 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 15:26:09,601 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-20 15:26:09,601 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-20 15:26:09,601 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-20 15:26:09,601 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-20 15:26:09,601 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-20 15:26:09,602 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-20 15:26:09,602 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-20 15:26:09,602 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-20 15:26:09,602 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-20 15:26:09,602 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-20 15:26:09,602 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-20 15:26:09,826 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-20 15:26:09,841 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-20 15:26:09,847 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-20 15:26:09,848 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-20 15:26:09,849 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-20 15:26:09,850 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/safe022_tso.yml/witness.yml [2024-06-20 15:26:09,932 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-20 15:26:09,933 INFO L274 PluginConnector]: CDTParser initialized [2024-06-20 15:26:09,933 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe022_tso.i [2024-06-20 15:26:10,908 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-20 15:26:11,114 INFO L384 CDTParser]: Found 1 translation units. [2024-06-20 15:26:11,139 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe022_tso.i [2024-06-20 15:26:11,148 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2b7e157e6/9ce87b86dd4b46cab7d5e80ed2b940ce/FLAG047b018ab [2024-06-20 15:26:11,166 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2b7e157e6/9ce87b86dd4b46cab7d5e80ed2b940ce [2024-06-20 15:26:11,166 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-20 15:26:11,167 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-20 15:26:11,169 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-20 15:26:11,169 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-20 15:26:11,173 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-20 15:26:11,173 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 03:26:09" (1/2) ... [2024-06-20 15:26:11,174 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17b99b7c and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:26:11, skipping insertion in model container [2024-06-20 15:26:11,174 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 03:26:09" (1/2) ... [2024-06-20 15:26:11,175 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4536da31 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:26:11, skipping insertion in model container [2024-06-20 15:26:11,176 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 03:26:11" (2/2) ... [2024-06-20 15:26:11,177 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17b99b7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:26:11, skipping insertion in model container [2024-06-20 15:26:11,178 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 03:26:11" (2/2) ... [2024-06-20 15:26:11,178 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-20 15:26:11,204 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-20 15:26:11,206 INFO L97 edCorrectnessWitness]: Location invariant before [L764-L764] ((((! multithreaded || ((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1))) [2024-06-20 15:26:11,206 INFO L97 edCorrectnessWitness]: Location invariant before [L763-L763] ((((! multithreaded || ((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1))) [2024-06-20 15:26:11,206 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-20 15:26:11,206 INFO L106 edCorrectnessWitness]: ghost_update [L761-L761] multithreaded = 1; [2024-06-20 15:26:11,240 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-20 15:26:11,475 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 15:26:11,482 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-20 15:26:11,560 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 15:26:11,591 INFO L206 MainTranslator]: Completed translation [2024-06-20 15:26:11,591 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:26:11 WrapperNode [2024-06-20 15:26:11,591 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-20 15:26:11,592 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-20 15:26:11,592 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-20 15:26:11,592 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-20 15:26:11,597 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:26:11" (1/1) ... [2024-06-20 15:26:11,628 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:26:11" (1/1) ... [2024-06-20 15:26:11,643 INFO L138 Inliner]: procedures = 174, calls = 33, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 57 [2024-06-20 15:26:11,645 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-20 15:26:11,646 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-20 15:26:11,647 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-20 15:26:11,647 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-20 15:26:11,654 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:26:11" (1/1) ... [2024-06-20 15:26:11,654 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:26:11" (1/1) ... [2024-06-20 15:26:11,660 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:26:11" (1/1) ... [2024-06-20 15:26:11,678 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]. [2024-06-20 15:26:11,678 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:26:11" (1/1) ... [2024-06-20 15:26:11,678 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:26:11" (1/1) ... [2024-06-20 15:26:11,692 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:26:11" (1/1) ... [2024-06-20 15:26:11,694 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:26:11" (1/1) ... [2024-06-20 15:26:11,697 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:26:11" (1/1) ... [2024-06-20 15:26:11,698 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:26:11" (1/1) ... [2024-06-20 15:26:11,699 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-20 15:26:11,703 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-20 15:26:11,703 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-20 15:26:11,703 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-20 15:26:11,704 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:26:11" (1/1) ... [2024-06-20 15:26:11,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 15:26:11,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-20 15:26:11,726 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) [2024-06-20 15:26:11,731 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 [2024-06-20 15:26:11,755 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-20 15:26:11,756 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-20 15:26:11,756 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-20 15:26:11,756 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-20 15:26:11,756 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-20 15:26:11,756 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-20 15:26:11,756 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-20 15:26:11,757 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-20 15:26:11,757 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-20 15:26:11,757 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-20 15:26:11,758 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-20 15:26:11,841 INFO L244 CfgBuilder]: Building ICFG [2024-06-20 15:26:11,842 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-20 15:26:11,950 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-20 15:26:11,951 INFO L293 CfgBuilder]: Performing block encoding [2024-06-20 15:26:12,010 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-20 15:26:12,010 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-20 15:26:12,010 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 03:26:12 BoogieIcfgContainer [2024-06-20 15:26:12,011 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-20 15:26:12,012 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-20 15:26:12,012 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-20 15:26:12,014 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-20 15:26:12,014 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 03:26:09" (1/4) ... [2024-06-20 15:26:12,015 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32356b91 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 03:26:12, skipping insertion in model container [2024-06-20 15:26:12,015 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.06 03:26:11" (2/4) ... [2024-06-20 15:26:12,015 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32356b91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.06 03:26:12, skipping insertion in model container [2024-06-20 15:26:12,015 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:26:11" (3/4) ... [2024-06-20 15:26:12,015 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32356b91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.06 03:26:12, skipping insertion in model container [2024-06-20 15:26:12,016 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 03:26:12" (4/4) ... [2024-06-20 15:26:12,016 INFO L112 eAbstractionObserver]: Analyzing ICFG safe022_tso.i [2024-06-20 15:26:12,028 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-20 15:26:12,029 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-06-20 15:26:12,029 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-20 15:26:12,072 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-20 15:26:12,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 36 places, 29 transitions, 66 flow [2024-06-20 15:26:12,130 INFO L124 PetriNetUnfolderBase]: 0/27 cut-off events. [2024-06-20 15:26:12,130 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 15:26:12,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34 conditions, 27 events. 0/27 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 39 event pairs, 0 based on Foata normal form. 0/25 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-20 15:26:12,131 INFO L82 GeneralOperation]: Start removeDead. Operand has 36 places, 29 transitions, 66 flow [2024-06-20 15:26:12,136 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 28 places, 21 transitions, 48 flow [2024-06-20 15:26:12,142 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-20 15:26:12,147 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;@22b077a1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-20 15:26:12,147 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-06-20 15:26:12,166 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-20 15:26:12,166 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-20 15:26:12,166 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 15:26:12,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:26:12,167 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-20 15:26:12,168 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)] === [2024-06-20 15:26:12,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:26:12,172 INFO L85 PathProgramCache]: Analyzing trace with hash 188072989, now seen corresponding path program 1 times [2024-06-20 15:26:12,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:26:12,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829958075] [2024-06-20 15:26:12,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:26:12,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:26:12,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:26:12,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:26:12,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:26:12,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829958075] [2024-06-20 15:26:12,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829958075] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:26:12,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:26:12,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-20 15:26:12,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374978066] [2024-06-20 15:26:12,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:26:12,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-20 15:26:12,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:26:12,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-20 15:26:12,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-20 15:26:12,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 29 [2024-06-20 15:26:12,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 21 transitions, 48 flow. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 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) [2024-06-20 15:26:12,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:26:12,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 29 [2024-06-20 15:26:12,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:26:12,663 INFO L124 PetriNetUnfolderBase]: 65/142 cut-off events. [2024-06-20 15:26:12,663 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-06-20 15:26:12,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 287 conditions, 142 events. 65/142 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 481 event pairs, 33 based on Foata normal form. 1/132 useless extension candidates. Maximal degree in co-relation 276. Up to 124 conditions per place. [2024-06-20 15:26:12,667 INFO L140 encePairwiseOnDemand]: 24/29 looper letters, 17 selfloop transitions, 3 changer transitions 0/27 dead transitions. [2024-06-20 15:26:12,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 27 transitions, 103 flow [2024-06-20 15:26:12,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-20 15:26:12,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-20 15:26:12,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 61 transitions. [2024-06-20 15:26:12,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7011494252873564 [2024-06-20 15:26:12,678 INFO L175 Difference]: Start difference. First operand has 28 places, 21 transitions, 48 flow. Second operand 3 states and 61 transitions. [2024-06-20 15:26:12,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 27 transitions, 103 flow [2024-06-20 15:26:12,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 27 transitions, 100 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-20 15:26:12,682 INFO L231 Difference]: Finished difference. Result has 29 places, 23 transitions, 67 flow [2024-06-20 15:26:12,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=67, PETRI_PLACES=29, PETRI_TRANSITIONS=23} [2024-06-20 15:26:12,686 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 1 predicate places. [2024-06-20 15:26:12,686 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 23 transitions, 67 flow [2024-06-20 15:26:12,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 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) [2024-06-20 15:26:12,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:26:12,686 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:26:12,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-20 15:26:12,687 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:26:12,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:26:12,687 INFO L85 PathProgramCache]: Analyzing trace with hash 349547388, now seen corresponding path program 1 times [2024-06-20 15:26:12,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:26:12,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327317300] [2024-06-20 15:26:12,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:26:12,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:26:12,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:26:12,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:26:12,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:26:12,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327317300] [2024-06-20 15:26:12,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327317300] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:26:12,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:26:12,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-20 15:26:12,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904341726] [2024-06-20 15:26:12,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:26:12,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-20 15:26:12,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:26:12,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-20 15:26:12,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-20 15:26:12,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 29 [2024-06-20 15:26:12,824 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 23 transitions, 67 flow. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:12,824 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:26:12,824 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 29 [2024-06-20 15:26:12,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:26:12,891 INFO L124 PetriNetUnfolderBase]: 82/177 cut-off events. [2024-06-20 15:26:12,891 INFO L125 PetriNetUnfolderBase]: For 35/35 co-relation queries the response was YES. [2024-06-20 15:26:12,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 408 conditions, 177 events. 82/177 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 625 event pairs, 34 based on Foata normal form. 2/177 useless extension candidates. Maximal degree in co-relation 396. Up to 144 conditions per place. [2024-06-20 15:26:12,893 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 24 selfloop transitions, 5 changer transitions 0/35 dead transitions. [2024-06-20 15:26:12,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 35 transitions, 156 flow [2024-06-20 15:26:12,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 15:26:12,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 15:26:12,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 77 transitions. [2024-06-20 15:26:12,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6637931034482759 [2024-06-20 15:26:12,897 INFO L175 Difference]: Start difference. First operand has 29 places, 23 transitions, 67 flow. Second operand 4 states and 77 transitions. [2024-06-20 15:26:12,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 35 transitions, 156 flow [2024-06-20 15:26:12,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 35 transitions, 152 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-20 15:26:12,901 INFO L231 Difference]: Finished difference. Result has 33 places, 27 transitions, 100 flow [2024-06-20 15:26:12,901 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=100, PETRI_PLACES=33, PETRI_TRANSITIONS=27} [2024-06-20 15:26:12,901 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 5 predicate places. [2024-06-20 15:26:12,902 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 27 transitions, 100 flow [2024-06-20 15:26:12,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:12,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:26:12,903 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:26:12,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-20 15:26:12,903 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)] === [2024-06-20 15:26:12,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:26:12,908 INFO L85 PathProgramCache]: Analyzing trace with hash -2048931818, now seen corresponding path program 1 times [2024-06-20 15:26:12,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:26:12,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890054898] [2024-06-20 15:26:12,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:26:12,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:26:12,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:26:13,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:26:13,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:26:13,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890054898] [2024-06-20 15:26:13,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890054898] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:26:13,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:26:13,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 15:26:13,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956802044] [2024-06-20 15:26:13,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:26:13,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 15:26:13,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:26:13,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 15:26:13,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-20 15:26:13,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-20 15:26:13,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 27 transitions, 100 flow. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 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) [2024-06-20 15:26:13,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:26:13,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-20 15:26:13,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:26:13,147 INFO L124 PetriNetUnfolderBase]: 97/202 cut-off events. [2024-06-20 15:26:13,147 INFO L125 PetriNetUnfolderBase]: For 118/118 co-relation queries the response was YES. [2024-06-20 15:26:13,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 533 conditions, 202 events. 97/202 cut-off events. For 118/118 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 721 event pairs, 28 based on Foata normal form. 2/203 useless extension candidates. Maximal degree in co-relation 518. Up to 161 conditions per place. [2024-06-20 15:26:13,151 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 33 selfloop transitions, 7 changer transitions 0/45 dead transitions. [2024-06-20 15:26:13,151 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 45 transitions, 231 flow [2024-06-20 15:26:13,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:26:13,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:26:13,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 91 transitions. [2024-06-20 15:26:13,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6275862068965518 [2024-06-20 15:26:13,157 INFO L175 Difference]: Start difference. First operand has 33 places, 27 transitions, 100 flow. Second operand 5 states and 91 transitions. [2024-06-20 15:26:13,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 45 transitions, 231 flow [2024-06-20 15:26:13,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 45 transitions, 231 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-06-20 15:26:13,159 INFO L231 Difference]: Finished difference. Result has 40 places, 33 transitions, 156 flow [2024-06-20 15:26:13,160 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=156, PETRI_PLACES=40, PETRI_TRANSITIONS=33} [2024-06-20 15:26:13,161 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 12 predicate places. [2024-06-20 15:26:13,161 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 33 transitions, 156 flow [2024-06-20 15:26:13,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 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) [2024-06-20 15:26:13,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:26:13,161 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:26:13,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-20 15:26:13,162 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:26:13,162 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:26:13,162 INFO L85 PathProgramCache]: Analyzing trace with hash -1928421163, now seen corresponding path program 1 times [2024-06-20 15:26:13,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:26:13,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797359081] [2024-06-20 15:26:13,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:26:13,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:26:13,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:26:13,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:26:13,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:26:13,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797359081] [2024-06-20 15:26:13,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797359081] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:26:13,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:26:13,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:26:13,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347631804] [2024-06-20 15:26:13,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:26:13,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:26:13,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:26:13,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:26:13,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:26:13,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-20 15:26:13,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 33 transitions, 156 flow. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:13,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:26:13,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-20 15:26:13,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:26:13,410 INFO L124 PetriNetUnfolderBase]: 93/194 cut-off events. [2024-06-20 15:26:13,411 INFO L125 PetriNetUnfolderBase]: For 224/224 co-relation queries the response was YES. [2024-06-20 15:26:13,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 593 conditions, 194 events. 93/194 cut-off events. For 224/224 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 675 event pairs, 12 based on Foata normal form. 4/197 useless extension candidates. Maximal degree in co-relation 573. Up to 135 conditions per place. [2024-06-20 15:26:13,413 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 33 selfloop transitions, 8 changer transitions 0/46 dead transitions. [2024-06-20 15:26:13,413 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 46 transitions, 264 flow [2024-06-20 15:26:13,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:26:13,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:26:13,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 103 transitions. [2024-06-20 15:26:13,416 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5919540229885057 [2024-06-20 15:26:13,416 INFO L175 Difference]: Start difference. First operand has 40 places, 33 transitions, 156 flow. Second operand 6 states and 103 transitions. [2024-06-20 15:26:13,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 46 transitions, 264 flow [2024-06-20 15:26:13,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 46 transitions, 264 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-06-20 15:26:13,419 INFO L231 Difference]: Finished difference. Result has 45 places, 32 transitions, 168 flow [2024-06-20 15:26:13,419 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=168, PETRI_PLACES=45, PETRI_TRANSITIONS=32} [2024-06-20 15:26:13,421 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 17 predicate places. [2024-06-20 15:26:13,421 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 32 transitions, 168 flow [2024-06-20 15:26:13,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:13,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:26:13,421 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:26:13,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-20 15:26:13,422 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)] === [2024-06-20 15:26:13,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:26:13,422 INFO L85 PathProgramCache]: Analyzing trace with hash 446718973, now seen corresponding path program 1 times [2024-06-20 15:26:13,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:26:13,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864142245] [2024-06-20 15:26:13,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:26:13,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:26:13,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:26:13,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:26:13,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:26:13,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864142245] [2024-06-20 15:26:13,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864142245] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:26:13,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:26:13,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:26:13,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660712928] [2024-06-20 15:26:13,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:26:13,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:26:13,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:26:13,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:26:13,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:26:13,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-20 15:26:13,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 32 transitions, 168 flow. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:13,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:26:13,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-20 15:26:13,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:26:13,585 INFO L124 PetriNetUnfolderBase]: 96/203 cut-off events. [2024-06-20 15:26:13,585 INFO L125 PetriNetUnfolderBase]: For 337/337 co-relation queries the response was YES. [2024-06-20 15:26:13,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 660 conditions, 203 events. 96/203 cut-off events. For 337/337 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 730 event pairs, 24 based on Foata normal form. 1/203 useless extension candidates. Maximal degree in co-relation 637. Up to 143 conditions per place. [2024-06-20 15:26:13,587 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 32 selfloop transitions, 13 changer transitions 0/50 dead transitions. [2024-06-20 15:26:13,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 50 transitions, 316 flow [2024-06-20 15:26:13,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:26:13,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:26:13,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-20 15:26:13,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6149425287356322 [2024-06-20 15:26:13,588 INFO L175 Difference]: Start difference. First operand has 45 places, 32 transitions, 168 flow. Second operand 6 states and 107 transitions. [2024-06-20 15:26:13,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 50 transitions, 316 flow [2024-06-20 15:26:13,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 50 transitions, 295 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-20 15:26:13,590 INFO L231 Difference]: Finished difference. Result has 46 places, 36 transitions, 198 flow [2024-06-20 15:26:13,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=147, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=198, PETRI_PLACES=46, PETRI_TRANSITIONS=36} [2024-06-20 15:26:13,591 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 18 predicate places. [2024-06-20 15:26:13,591 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 36 transitions, 198 flow [2024-06-20 15:26:13,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:13,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:26:13,591 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:26:13,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-20 15:26:13,592 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)] === [2024-06-20 15:26:13,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:26:13,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1361247721, now seen corresponding path program 1 times [2024-06-20 15:26:13,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:26:13,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589082632] [2024-06-20 15:26:13,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:26:13,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:26:13,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:26:13,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:26:13,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:26:13,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589082632] [2024-06-20 15:26:13,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589082632] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:26:13,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:26:13,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:26:13,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100543908] [2024-06-20 15:26:13,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:26:13,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:26:13,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:26:13,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:26:13,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:26:13,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-20 15:26:13,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 36 transitions, 198 flow. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:13,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:26:13,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-20 15:26:13,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:26:13,753 INFO L124 PetriNetUnfolderBase]: 102/213 cut-off events. [2024-06-20 15:26:13,754 INFO L125 PetriNetUnfolderBase]: For 450/450 co-relation queries the response was YES. [2024-06-20 15:26:13,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 734 conditions, 213 events. 102/213 cut-off events. For 450/450 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 771 event pairs, 24 based on Foata normal form. 1/213 useless extension candidates. Maximal degree in co-relation 711. Up to 156 conditions per place. [2024-06-20 15:26:13,755 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 34 selfloop transitions, 14 changer transitions 0/53 dead transitions. [2024-06-20 15:26:13,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 53 transitions, 362 flow [2024-06-20 15:26:13,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:26:13,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:26:13,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-06-20 15:26:13,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.603448275862069 [2024-06-20 15:26:13,756 INFO L175 Difference]: Start difference. First operand has 46 places, 36 transitions, 198 flow. Second operand 6 states and 105 transitions. [2024-06-20 15:26:13,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 53 transitions, 362 flow [2024-06-20 15:26:13,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 53 transitions, 336 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-20 15:26:13,759 INFO L231 Difference]: Finished difference. Result has 50 places, 42 transitions, 246 flow [2024-06-20 15:26:13,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=246, PETRI_PLACES=50, PETRI_TRANSITIONS=42} [2024-06-20 15:26:13,759 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 22 predicate places. [2024-06-20 15:26:13,759 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 42 transitions, 246 flow [2024-06-20 15:26:13,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:13,760 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:26:13,760 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:26:13,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-20 15:26:13,760 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:26:13,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:26:13,761 INFO L85 PathProgramCache]: Analyzing trace with hash 446838943, now seen corresponding path program 2 times [2024-06-20 15:26:13,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:26:13,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616419934] [2024-06-20 15:26:13,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:26:13,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:26:13,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:26:13,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:26:13,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:26:13,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616419934] [2024-06-20 15:26:13,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616419934] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:26:13,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:26:13,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:26:13,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331482705] [2024-06-20 15:26:13,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:26:13,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:26:13,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:26:13,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:26:13,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:26:13,874 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-20 15:26:13,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 42 transitions, 246 flow. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:13,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:26:13,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-20 15:26:13,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:26:13,938 INFO L124 PetriNetUnfolderBase]: 105/220 cut-off events. [2024-06-20 15:26:13,939 INFO L125 PetriNetUnfolderBase]: For 572/572 co-relation queries the response was YES. [2024-06-20 15:26:13,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 795 conditions, 220 events. 105/220 cut-off events. For 572/572 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 807 event pairs, 23 based on Foata normal form. 1/220 useless extension candidates. Maximal degree in co-relation 770. Up to 170 conditions per place. [2024-06-20 15:26:13,940 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 37 selfloop transitions, 12 changer transitions 0/54 dead transitions. [2024-06-20 15:26:13,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 54 transitions, 378 flow [2024-06-20 15:26:13,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:26:13,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:26:13,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 102 transitions. [2024-06-20 15:26:13,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5862068965517241 [2024-06-20 15:26:13,941 INFO L175 Difference]: Start difference. First operand has 50 places, 42 transitions, 246 flow. Second operand 6 states and 102 transitions. [2024-06-20 15:26:13,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 54 transitions, 378 flow [2024-06-20 15:26:13,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 54 transitions, 367 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-06-20 15:26:13,945 INFO L231 Difference]: Finished difference. Result has 55 places, 44 transitions, 278 flow [2024-06-20 15:26:13,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=235, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=278, PETRI_PLACES=55, PETRI_TRANSITIONS=44} [2024-06-20 15:26:13,946 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 27 predicate places. [2024-06-20 15:26:13,946 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 44 transitions, 278 flow [2024-06-20 15:26:13,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:13,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:26:13,946 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:26:13,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-20 15:26:13,947 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)] === [2024-06-20 15:26:13,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:26:13,947 INFO L85 PathProgramCache]: Analyzing trace with hash 1917367571, now seen corresponding path program 2 times [2024-06-20 15:26:13,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:26:13,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619405704] [2024-06-20 15:26:13,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:26:13,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:26:13,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:26:14,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:26:14,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:26:14,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619405704] [2024-06-20 15:26:14,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619405704] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:26:14,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:26:14,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:26:14,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223235149] [2024-06-20 15:26:14,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:26:14,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:26:14,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:26:14,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:26:14,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:26:14,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-20 15:26:14,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 44 transitions, 278 flow. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:14,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:26:14,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-20 15:26:14,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:26:14,134 INFO L124 PetriNetUnfolderBase]: 108/227 cut-off events. [2024-06-20 15:26:14,134 INFO L125 PetriNetUnfolderBase]: For 709/709 co-relation queries the response was YES. [2024-06-20 15:26:14,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 866 conditions, 227 events. 108/227 cut-off events. For 709/709 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 857 event pairs, 24 based on Foata normal form. 1/227 useless extension candidates. Maximal degree in co-relation 839. Up to 172 conditions per place. [2024-06-20 15:26:14,136 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 37 selfloop transitions, 12 changer transitions 0/54 dead transitions. [2024-06-20 15:26:14,136 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 54 transitions, 408 flow [2024-06-20 15:26:14,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 15:26:14,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 15:26:14,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 76 transitions. [2024-06-20 15:26:14,137 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6551724137931034 [2024-06-20 15:26:14,137 INFO L175 Difference]: Start difference. First operand has 55 places, 44 transitions, 278 flow. Second operand 4 states and 76 transitions. [2024-06-20 15:26:14,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 54 transitions, 408 flow [2024-06-20 15:26:14,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 54 transitions, 379 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-20 15:26:14,140 INFO L231 Difference]: Finished difference. Result has 54 places, 46 transitions, 301 flow [2024-06-20 15:26:14,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=249, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=301, PETRI_PLACES=54, PETRI_TRANSITIONS=46} [2024-06-20 15:26:14,140 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 26 predicate places. [2024-06-20 15:26:14,140 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 46 transitions, 301 flow [2024-06-20 15:26:14,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:14,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:26:14,141 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:26:14,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-20 15:26:14,141 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)] === [2024-06-20 15:26:14,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:26:14,142 INFO L85 PathProgramCache]: Analyzing trace with hash 1917130235, now seen corresponding path program 3 times [2024-06-20 15:26:14,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:26:14,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778432614] [2024-06-20 15:26:14,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:26:14,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:26:14,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:26:14,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:26:14,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:26:14,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778432614] [2024-06-20 15:26:14,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778432614] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:26:14,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:26:14,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:26:14,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297845341] [2024-06-20 15:26:14,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:26:14,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:26:14,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:26:14,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:26:14,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:26:14,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-20 15:26:14,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 46 transitions, 301 flow. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:14,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:26:14,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-20 15:26:14,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:26:14,317 INFO L124 PetriNetUnfolderBase]: 106/224 cut-off events. [2024-06-20 15:26:14,317 INFO L125 PetriNetUnfolderBase]: For 851/851 co-relation queries the response was YES. [2024-06-20 15:26:14,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 881 conditions, 224 events. 106/224 cut-off events. For 851/851 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 840 event pairs, 23 based on Foata normal form. 1/224 useless extension candidates. Maximal degree in co-relation 854. Up to 160 conditions per place. [2024-06-20 15:26:14,319 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 38 selfloop transitions, 15 changer transitions 0/58 dead transitions. [2024-06-20 15:26:14,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 58 transitions, 437 flow [2024-06-20 15:26:14,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:26:14,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:26:14,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 92 transitions. [2024-06-20 15:26:14,320 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6344827586206897 [2024-06-20 15:26:14,320 INFO L175 Difference]: Start difference. First operand has 54 places, 46 transitions, 301 flow. Second operand 5 states and 92 transitions. [2024-06-20 15:26:14,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 58 transitions, 437 flow [2024-06-20 15:26:14,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 58 transitions, 421 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-20 15:26:14,323 INFO L231 Difference]: Finished difference. Result has 57 places, 46 transitions, 326 flow [2024-06-20 15:26:14,323 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=285, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=326, PETRI_PLACES=57, PETRI_TRANSITIONS=46} [2024-06-20 15:26:14,323 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 29 predicate places. [2024-06-20 15:26:14,323 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 46 transitions, 326 flow [2024-06-20 15:26:14,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:14,324 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:26:14,324 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:26:14,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-20 15:26:14,324 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)] === [2024-06-20 15:26:14,324 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:26:14,325 INFO L85 PathProgramCache]: Analyzing trace with hash 1917130421, now seen corresponding path program 3 times [2024-06-20 15:26:14,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:26:14,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948676510] [2024-06-20 15:26:14,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:26:14,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:26:14,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:26:14,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:26:14,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:26:14,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948676510] [2024-06-20 15:26:14,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948676510] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:26:14,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:26:14,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:26:14,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539537261] [2024-06-20 15:26:14,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:26:14,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:26:14,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:26:14,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:26:14,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:26:14,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-20 15:26:14,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 46 transitions, 326 flow. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:14,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:26:14,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-20 15:26:14,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:26:14,471 INFO L124 PetriNetUnfolderBase]: 104/221 cut-off events. [2024-06-20 15:26:14,471 INFO L125 PetriNetUnfolderBase]: For 1014/1014 co-relation queries the response was YES. [2024-06-20 15:26:14,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 908 conditions, 221 events. 104/221 cut-off events. For 1014/1014 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 833 event pairs, 24 based on Foata normal form. 1/221 useless extension candidates. Maximal degree in co-relation 880. Up to 160 conditions per place. [2024-06-20 15:26:14,473 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 34 selfloop transitions, 16 changer transitions 0/55 dead transitions. [2024-06-20 15:26:14,473 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 55 transitions, 448 flow [2024-06-20 15:26:14,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:26:14,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:26:14,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 90 transitions. [2024-06-20 15:26:14,474 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6206896551724138 [2024-06-20 15:26:14,474 INFO L175 Difference]: Start difference. First operand has 57 places, 46 transitions, 326 flow. Second operand 5 states and 90 transitions. [2024-06-20 15:26:14,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 55 transitions, 448 flow [2024-06-20 15:26:14,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 55 transitions, 414 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-20 15:26:14,477 INFO L231 Difference]: Finished difference. Result has 58 places, 46 transitions, 332 flow [2024-06-20 15:26:14,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=292, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=332, PETRI_PLACES=58, PETRI_TRANSITIONS=46} [2024-06-20 15:26:14,478 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 30 predicate places. [2024-06-20 15:26:14,478 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 46 transitions, 332 flow [2024-06-20 15:26:14,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:14,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:26:14,478 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:26:14,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-20 15:26:14,479 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)] === [2024-06-20 15:26:14,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:26:14,479 INFO L85 PathProgramCache]: Analyzing trace with hash 1917376499, now seen corresponding path program 1 times [2024-06-20 15:26:14,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:26:14,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772512623] [2024-06-20 15:26:14,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:26:14,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:26:14,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:26:14,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:26:14,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:26:14,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772512623] [2024-06-20 15:26:14,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772512623] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:26:14,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:26:14,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:26:14,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227266060] [2024-06-20 15:26:14,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:26:14,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:26:14,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:26:14,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:26:14,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:26:14,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-20 15:26:14,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 46 transitions, 332 flow. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:14,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:26:14,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-20 15:26:14,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:26:14,631 INFO L124 PetriNetUnfolderBase]: 101/216 cut-off events. [2024-06-20 15:26:14,632 INFO L125 PetriNetUnfolderBase]: For 967/967 co-relation queries the response was YES. [2024-06-20 15:26:14,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 884 conditions, 216 events. 101/216 cut-off events. For 967/967 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 790 event pairs, 23 based on Foata normal form. 2/217 useless extension candidates. Maximal degree in co-relation 855. Up to 173 conditions per place. [2024-06-20 15:26:14,633 INFO L140 encePairwiseOnDemand]: 25/29 looper letters, 41 selfloop transitions, 6 changer transitions 0/52 dead transitions. [2024-06-20 15:26:14,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 52 transitions, 440 flow [2024-06-20 15:26:14,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 15:26:14,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 15:26:14,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 70 transitions. [2024-06-20 15:26:14,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.603448275862069 [2024-06-20 15:26:14,634 INFO L175 Difference]: Start difference. First operand has 58 places, 46 transitions, 332 flow. Second operand 4 states and 70 transitions. [2024-06-20 15:26:14,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 52 transitions, 440 flow [2024-06-20 15:26:14,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 52 transitions, 403 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-20 15:26:14,637 INFO L231 Difference]: Finished difference. Result has 58 places, 46 transitions, 311 flow [2024-06-20 15:26:14,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=295, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=311, PETRI_PLACES=58, PETRI_TRANSITIONS=46} [2024-06-20 15:26:14,637 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 30 predicate places. [2024-06-20 15:26:14,637 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 46 transitions, 311 flow [2024-06-20 15:26:14,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:14,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:26:14,638 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:26:14,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-20 15:26:14,638 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)] === [2024-06-20 15:26:14,638 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:26:14,639 INFO L85 PathProgramCache]: Analyzing trace with hash 747269371, now seen corresponding path program 1 times [2024-06-20 15:26:14,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:26:14,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112362870] [2024-06-20 15:26:14,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:26:14,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:26:14,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:26:14,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:26:14,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:26:14,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112362870] [2024-06-20 15:26:14,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112362870] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:26:14,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:26:14,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:26:14,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219771550] [2024-06-20 15:26:14,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:26:14,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:26:14,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:26:14,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:26:14,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:26:14,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-20 15:26:14,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 46 transitions, 311 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 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) [2024-06-20 15:26:14,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:26:14,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-20 15:26:14,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:26:14,808 INFO L124 PetriNetUnfolderBase]: 104/221 cut-off events. [2024-06-20 15:26:14,809 INFO L125 PetriNetUnfolderBase]: For 916/916 co-relation queries the response was YES. [2024-06-20 15:26:14,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 879 conditions, 221 events. 104/221 cut-off events. For 916/916 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 826 event pairs, 22 based on Foata normal form. 1/221 useless extension candidates. Maximal degree in co-relation 850. Up to 127 conditions per place. [2024-06-20 15:26:14,810 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 36 selfloop transitions, 24 changer transitions 0/65 dead transitions. [2024-06-20 15:26:14,810 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 65 transitions, 509 flow [2024-06-20 15:26:14,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:26:14,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:26:14,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-20 15:26:14,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6108374384236454 [2024-06-20 15:26:14,811 INFO L175 Difference]: Start difference. First operand has 58 places, 46 transitions, 311 flow. Second operand 7 states and 124 transitions. [2024-06-20 15:26:14,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 65 transitions, 509 flow [2024-06-20 15:26:14,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 65 transitions, 497 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-20 15:26:14,814 INFO L231 Difference]: Finished difference. Result has 63 places, 50 transitions, 380 flow [2024-06-20 15:26:14,815 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=299, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=380, PETRI_PLACES=63, PETRI_TRANSITIONS=50} [2024-06-20 15:26:14,815 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 35 predicate places. [2024-06-20 15:26:14,815 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 50 transitions, 380 flow [2024-06-20 15:26:14,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 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) [2024-06-20 15:26:14,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:26:14,816 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:26:14,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-20 15:26:14,816 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)] === [2024-06-20 15:26:14,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:26:14,816 INFO L85 PathProgramCache]: Analyzing trace with hash 750988441, now seen corresponding path program 2 times [2024-06-20 15:26:14,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:26:14,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450258276] [2024-06-20 15:26:14,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:26:14,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:26:14,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:26:14,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:26:14,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:26:14,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450258276] [2024-06-20 15:26:14,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450258276] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:26:14,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:26:14,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:26:14,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277348357] [2024-06-20 15:26:14,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:26:14,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:26:14,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:26:14,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:26:14,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:26:14,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-20 15:26:14,949 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 50 transitions, 380 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 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) [2024-06-20 15:26:14,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:26:14,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-20 15:26:14,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:26:15,030 INFO L124 PetriNetUnfolderBase]: 112/238 cut-off events. [2024-06-20 15:26:15,031 INFO L125 PetriNetUnfolderBase]: For 1220/1220 co-relation queries the response was YES. [2024-06-20 15:26:15,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1019 conditions, 238 events. 112/238 cut-off events. For 1220/1220 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 924 event pairs, 22 based on Foata normal form. 1/238 useless extension candidates. Maximal degree in co-relation 989. Up to 163 conditions per place. [2024-06-20 15:26:15,032 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 40 selfloop transitions, 21 changer transitions 0/66 dead transitions. [2024-06-20 15:26:15,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 66 transitions, 582 flow [2024-06-20 15:26:15,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:26:15,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:26:15,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-20 15:26:15,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5960591133004927 [2024-06-20 15:26:15,034 INFO L175 Difference]: Start difference. First operand has 63 places, 50 transitions, 380 flow. Second operand 7 states and 121 transitions. [2024-06-20 15:26:15,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 66 transitions, 582 flow [2024-06-20 15:26:15,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 66 transitions, 548 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-20 15:26:15,037 INFO L231 Difference]: Finished difference. Result has 67 places, 54 transitions, 429 flow [2024-06-20 15:26:15,037 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=350, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=429, PETRI_PLACES=67, PETRI_TRANSITIONS=54} [2024-06-20 15:26:15,037 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 39 predicate places. [2024-06-20 15:26:15,038 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 54 transitions, 429 flow [2024-06-20 15:26:15,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 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) [2024-06-20 15:26:15,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:26:15,038 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:26:15,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-20 15:26:15,038 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)] === [2024-06-20 15:26:15,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:26:15,039 INFO L85 PathProgramCache]: Analyzing trace with hash 967111523, now seen corresponding path program 3 times [2024-06-20 15:26:15,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:26:15,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490037091] [2024-06-20 15:26:15,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:26:15,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:26:15,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:26:15,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:26:15,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:26:15,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490037091] [2024-06-20 15:26:15,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490037091] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:26:15,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:26:15,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:26:15,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584252875] [2024-06-20 15:26:15,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:26:15,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:26:15,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:26:15,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:26:15,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:26:15,156 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-20 15:26:15,156 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 54 transitions, 429 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 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) [2024-06-20 15:26:15,156 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:26:15,157 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-20 15:26:15,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:26:15,248 INFO L124 PetriNetUnfolderBase]: 110/235 cut-off events. [2024-06-20 15:26:15,249 INFO L125 PetriNetUnfolderBase]: For 1333/1333 co-relation queries the response was YES. [2024-06-20 15:26:15,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1042 conditions, 235 events. 110/235 cut-off events. For 1333/1333 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 918 event pairs, 22 based on Foata normal form. 1/235 useless extension candidates. Maximal degree in co-relation 1010. Up to 161 conditions per place. [2024-06-20 15:26:15,250 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 40 selfloop transitions, 22 changer transitions 0/67 dead transitions. [2024-06-20 15:26:15,251 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 67 transitions, 583 flow [2024-06-20 15:26:15,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:26:15,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:26:15,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-20 15:26:15,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5593869731800766 [2024-06-20 15:26:15,252 INFO L175 Difference]: Start difference. First operand has 67 places, 54 transitions, 429 flow. Second operand 9 states and 146 transitions. [2024-06-20 15:26:15,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 67 transitions, 583 flow [2024-06-20 15:26:15,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 67 transitions, 554 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-20 15:26:15,256 INFO L231 Difference]: Finished difference. Result has 73 places, 54 transitions, 449 flow [2024-06-20 15:26:15,256 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=400, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=449, PETRI_PLACES=73, PETRI_TRANSITIONS=54} [2024-06-20 15:26:15,257 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 45 predicate places. [2024-06-20 15:26:15,257 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 54 transitions, 449 flow [2024-06-20 15:26:15,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 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) [2024-06-20 15:26:15,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:26:15,257 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:26:15,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-20 15:26:15,258 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)] === [2024-06-20 15:26:15,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:26:15,258 INFO L85 PathProgramCache]: Analyzing trace with hash -698498681, now seen corresponding path program 4 times [2024-06-20 15:26:15,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:26:15,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430392980] [2024-06-20 15:26:15,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:26:15,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:26:15,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:26:15,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:26:15,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:26:15,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430392980] [2024-06-20 15:26:15,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430392980] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:26:15,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:26:15,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:26:15,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102702799] [2024-06-20 15:26:15,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:26:15,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:26:15,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:26:15,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:26:15,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:26:15,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-20 15:26:15,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 54 transitions, 449 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 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) [2024-06-20 15:26:15,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:26:15,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-20 15:26:15,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:26:15,457 INFO L124 PetriNetUnfolderBase]: 118/252 cut-off events. [2024-06-20 15:26:15,457 INFO L125 PetriNetUnfolderBase]: For 1607/1607 co-relation queries the response was YES. [2024-06-20 15:26:15,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1165 conditions, 252 events. 118/252 cut-off events. For 1607/1607 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1011 event pairs, 22 based on Foata normal form. 1/252 useless extension candidates. Maximal degree in co-relation 1131. Up to 151 conditions per place. [2024-06-20 15:26:15,459 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 38 selfloop transitions, 32 changer transitions 0/75 dead transitions. [2024-06-20 15:26:15,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 75 transitions, 713 flow [2024-06-20 15:26:15,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:26:15,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:26:15,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-20 15:26:15,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5991379310344828 [2024-06-20 15:26:15,460 INFO L175 Difference]: Start difference. First operand has 73 places, 54 transitions, 449 flow. Second operand 8 states and 139 transitions. [2024-06-20 15:26:15,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 75 transitions, 713 flow [2024-06-20 15:26:15,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 75 transitions, 664 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-20 15:26:15,465 INFO L231 Difference]: Finished difference. Result has 73 places, 58 transitions, 508 flow [2024-06-20 15:26:15,465 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=400, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=508, PETRI_PLACES=73, PETRI_TRANSITIONS=58} [2024-06-20 15:26:15,466 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 45 predicate places. [2024-06-20 15:26:15,466 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 58 transitions, 508 flow [2024-06-20 15:26:15,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 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) [2024-06-20 15:26:15,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:26:15,466 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:26:15,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-20 15:26:15,466 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)] === [2024-06-20 15:26:15,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:26:15,467 INFO L85 PathProgramCache]: Analyzing trace with hash -82724201, now seen corresponding path program 5 times [2024-06-20 15:26:15,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:26:15,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143226902] [2024-06-20 15:26:15,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:26:15,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:26:15,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:26:15,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:26:15,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:26:15,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143226902] [2024-06-20 15:26:15,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143226902] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:26:15,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:26:15,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:26:15,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737237694] [2024-06-20 15:26:15,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:26:15,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:26:15,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:26:15,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:26:15,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:26:15,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-20 15:26:15,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 58 transitions, 508 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 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) [2024-06-20 15:26:15,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:26:15,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-20 15:26:15,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:26:15,667 INFO L124 PetriNetUnfolderBase]: 116/249 cut-off events. [2024-06-20 15:26:15,667 INFO L125 PetriNetUnfolderBase]: For 1773/1773 co-relation queries the response was YES. [2024-06-20 15:26:15,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1183 conditions, 249 events. 116/249 cut-off events. For 1773/1773 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 994 event pairs, 22 based on Foata normal form. 1/249 useless extension candidates. Maximal degree in co-relation 1148. Up to 149 conditions per place. [2024-06-20 15:26:15,669 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 37 selfloop transitions, 30 changer transitions 0/72 dead transitions. [2024-06-20 15:26:15,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 72 transitions, 702 flow [2024-06-20 15:26:15,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:26:15,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:26:15,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-20 15:26:15,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.632183908045977 [2024-06-20 15:26:15,670 INFO L175 Difference]: Start difference. First operand has 73 places, 58 transitions, 508 flow. Second operand 6 states and 110 transitions. [2024-06-20 15:26:15,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 72 transitions, 702 flow [2024-06-20 15:26:15,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 72 transitions, 623 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-20 15:26:15,674 INFO L231 Difference]: Finished difference. Result has 73 places, 58 transitions, 499 flow [2024-06-20 15:26:15,674 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=431, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=499, PETRI_PLACES=73, PETRI_TRANSITIONS=58} [2024-06-20 15:26:15,674 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 45 predicate places. [2024-06-20 15:26:15,674 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 58 transitions, 499 flow [2024-06-20 15:26:15,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 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) [2024-06-20 15:26:15,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:26:15,675 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:26:15,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-20 15:26:15,675 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)] === [2024-06-20 15:26:15,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:26:15,676 INFO L85 PathProgramCache]: Analyzing trace with hash -82516811, now seen corresponding path program 6 times [2024-06-20 15:26:15,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:26:15,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515492947] [2024-06-20 15:26:15,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:26:15,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:26:15,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:26:15,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:26:15,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:26:15,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515492947] [2024-06-20 15:26:15,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515492947] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:26:15,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:26:15,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:26:15,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088762240] [2024-06-20 15:26:15,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:26:15,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:26:15,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:26:15,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:26:15,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:26:15,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-20 15:26:15,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 58 transitions, 499 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 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) [2024-06-20 15:26:15,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:26:15,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-20 15:26:15,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:26:15,862 INFO L124 PetriNetUnfolderBase]: 114/246 cut-off events. [2024-06-20 15:26:15,862 INFO L125 PetriNetUnfolderBase]: For 1649/1649 co-relation queries the response was YES. [2024-06-20 15:26:15,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1147 conditions, 246 events. 114/246 cut-off events. For 1649/1649 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 977 event pairs, 22 based on Foata normal form. 1/246 useless extension candidates. Maximal degree in co-relation 1112. Up to 171 conditions per place. [2024-06-20 15:26:15,864 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 48 selfloop transitions, 17 changer transitions 0/70 dead transitions. [2024-06-20 15:26:15,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 70 transitions, 659 flow [2024-06-20 15:26:15,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:26:15,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:26:15,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 95 transitions. [2024-06-20 15:26:15,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6551724137931034 [2024-06-20 15:26:15,865 INFO L175 Difference]: Start difference. First operand has 73 places, 58 transitions, 499 flow. Second operand 5 states and 95 transitions. [2024-06-20 15:26:15,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 70 transitions, 659 flow [2024-06-20 15:26:15,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 70 transitions, 592 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-20 15:26:15,868 INFO L231 Difference]: Finished difference. Result has 72 places, 58 transitions, 477 flow [2024-06-20 15:26:15,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=432, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=477, PETRI_PLACES=72, PETRI_TRANSITIONS=58} [2024-06-20 15:26:15,869 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 44 predicate places. [2024-06-20 15:26:15,869 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 58 transitions, 477 flow [2024-06-20 15:26:15,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 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) [2024-06-20 15:26:15,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:26:15,869 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:26:15,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-20 15:26:15,870 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)] === [2024-06-20 15:26:15,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:26:15,870 INFO L85 PathProgramCache]: Analyzing trace with hash 1687652730, now seen corresponding path program 1 times [2024-06-20 15:26:15,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:26:15,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471911283] [2024-06-20 15:26:15,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:26:15,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:26:15,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:26:15,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:26:15,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:26:15,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471911283] [2024-06-20 15:26:15,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471911283] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:26:15,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:26:15,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:26:15,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316265939] [2024-06-20 15:26:15,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:26:15,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:26:15,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:26:15,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:26:15,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:26:16,003 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-20 15:26:16,003 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 58 transitions, 477 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 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) [2024-06-20 15:26:16,003 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:26:16,003 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-20 15:26:16,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:26:16,068 INFO L124 PetriNetUnfolderBase]: 118/254 cut-off events. [2024-06-20 15:26:16,068 INFO L125 PetriNetUnfolderBase]: For 1702/1702 co-relation queries the response was YES. [2024-06-20 15:26:16,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1150 conditions, 254 events. 118/254 cut-off events. For 1702/1702 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1018 event pairs, 8 based on Foata normal form. 2/255 useless extension candidates. Maximal degree in co-relation 1115. Up to 140 conditions per place. [2024-06-20 15:26:16,070 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 52 selfloop transitions, 19 changer transitions 0/76 dead transitions. [2024-06-20 15:26:16,070 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 76 transitions, 689 flow [2024-06-20 15:26:16,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:26:16,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:26:16,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-20 15:26:16,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5911330049261084 [2024-06-20 15:26:16,071 INFO L175 Difference]: Start difference. First operand has 72 places, 58 transitions, 477 flow. Second operand 7 states and 120 transitions. [2024-06-20 15:26:16,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 76 transitions, 689 flow [2024-06-20 15:26:16,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 76 transitions, 640 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-20 15:26:16,075 INFO L231 Difference]: Finished difference. Result has 74 places, 59 transitions, 474 flow [2024-06-20 15:26:16,076 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=428, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=474, PETRI_PLACES=74, PETRI_TRANSITIONS=59} [2024-06-20 15:26:16,076 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 46 predicate places. [2024-06-20 15:26:16,076 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 59 transitions, 474 flow [2024-06-20 15:26:16,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 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) [2024-06-20 15:26:16,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:26:16,076 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:26:16,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-20 15:26:16,077 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)] === [2024-06-20 15:26:16,077 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:26:16,077 INFO L85 PathProgramCache]: Analyzing trace with hash 1687713180, now seen corresponding path program 2 times [2024-06-20 15:26:16,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:26:16,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302321827] [2024-06-20 15:26:16,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:26:16,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:26:16,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:26:16,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:26:16,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:26:16,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302321827] [2024-06-20 15:26:16,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302321827] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:26:16,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:26:16,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:26:16,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534034149] [2024-06-20 15:26:16,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:26:16,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:26:16,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:26:16,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:26:16,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:26:16,190 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-20 15:26:16,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 59 transitions, 474 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 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) [2024-06-20 15:26:16,191 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:26:16,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-20 15:26:16,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:26:16,260 INFO L124 PetriNetUnfolderBase]: 122/262 cut-off events. [2024-06-20 15:26:16,260 INFO L125 PetriNetUnfolderBase]: For 1860/1860 co-relation queries the response was YES. [2024-06-20 15:26:16,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1188 conditions, 262 events. 122/262 cut-off events. For 1860/1860 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1071 event pairs, 19 based on Foata normal form. 2/263 useless extension candidates. Maximal degree in co-relation 1153. Up to 181 conditions per place. [2024-06-20 15:26:16,262 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 52 selfloop transitions, 18 changer transitions 0/75 dead transitions. [2024-06-20 15:26:16,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 75 transitions, 656 flow [2024-06-20 15:26:16,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:26:16,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:26:16,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-20 15:26:16,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5911330049261084 [2024-06-20 15:26:16,263 INFO L175 Difference]: Start difference. First operand has 74 places, 59 transitions, 474 flow. Second operand 7 states and 120 transitions. [2024-06-20 15:26:16,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 75 transitions, 656 flow [2024-06-20 15:26:16,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 75 transitions, 619 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-20 15:26:16,267 INFO L231 Difference]: Finished difference. Result has 77 places, 60 transitions, 485 flow [2024-06-20 15:26:16,267 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=440, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=485, PETRI_PLACES=77, PETRI_TRANSITIONS=60} [2024-06-20 15:26:16,268 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 49 predicate places. [2024-06-20 15:26:16,268 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 60 transitions, 485 flow [2024-06-20 15:26:16,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 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) [2024-06-20 15:26:16,268 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:26:16,268 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:26:16,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-20 15:26:16,268 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)] === [2024-06-20 15:26:16,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:26:16,269 INFO L85 PathProgramCache]: Analyzing trace with hash -84491170, now seen corresponding path program 3 times [2024-06-20 15:26:16,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:26:16,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853080759] [2024-06-20 15:26:16,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:26:16,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:26:16,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:26:16,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:26:16,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:26:16,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853080759] [2024-06-20 15:26:16,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853080759] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:26:16,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:26:16,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:26:16,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396237245] [2024-06-20 15:26:16,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:26:16,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:26:16,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:26:16,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:26:16,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:26:16,398 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-20 15:26:16,398 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 60 transitions, 485 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 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) [2024-06-20 15:26:16,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:26:16,399 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-20 15:26:16,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:26:16,464 INFO L124 PetriNetUnfolderBase]: 126/270 cut-off events. [2024-06-20 15:26:16,464 INFO L125 PetriNetUnfolderBase]: For 2039/2039 co-relation queries the response was YES. [2024-06-20 15:26:16,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1220 conditions, 270 events. 126/270 cut-off events. For 2039/2039 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1110 event pairs, 19 based on Foata normal form. 2/271 useless extension candidates. Maximal degree in co-relation 1184. Up to 204 conditions per place. [2024-06-20 15:26:16,466 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 55 selfloop transitions, 13 changer transitions 0/73 dead transitions. [2024-06-20 15:26:16,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 73 transitions, 654 flow [2024-06-20 15:26:16,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:26:16,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:26:16,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-20 15:26:16,467 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-20 15:26:16,467 INFO L175 Difference]: Start difference. First operand has 77 places, 60 transitions, 485 flow. Second operand 7 states and 116 transitions. [2024-06-20 15:26:16,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 73 transitions, 654 flow [2024-06-20 15:26:16,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 73 transitions, 618 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-20 15:26:16,471 INFO L231 Difference]: Finished difference. Result has 79 places, 61 transitions, 486 flow [2024-06-20 15:26:16,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=449, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=486, PETRI_PLACES=79, PETRI_TRANSITIONS=61} [2024-06-20 15:26:16,476 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 51 predicate places. [2024-06-20 15:26:16,476 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 61 transitions, 486 flow [2024-06-20 15:26:16,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 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) [2024-06-20 15:26:16,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:26:16,477 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:26:16,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-20 15:26:16,477 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)] === [2024-06-20 15:26:16,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:26:16,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1805985558, now seen corresponding path program 1 times [2024-06-20 15:26:16,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:26:16,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868115525] [2024-06-20 15:26:16,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:26:16,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:26:16,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:26:16,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:26:16,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:26:16,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868115525] [2024-06-20 15:26:16,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868115525] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:26:16,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:26:16,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:26:16,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356843856] [2024-06-20 15:26:16,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:26:16,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:26:16,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:26:16,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:26:16,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:26:16,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-20 15:26:16,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 61 transitions, 486 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 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) [2024-06-20 15:26:16,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:26:16,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-20 15:26:16,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:26:16,658 INFO L124 PetriNetUnfolderBase]: 130/278 cut-off events. [2024-06-20 15:26:16,659 INFO L125 PetriNetUnfolderBase]: For 2232/2232 co-relation queries the response was YES. [2024-06-20 15:26:16,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1250 conditions, 278 events. 130/278 cut-off events. For 2232/2232 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1151 event pairs, 20 based on Foata normal form. 2/279 useless extension candidates. Maximal degree in co-relation 1213. Up to 203 conditions per place. [2024-06-20 15:26:16,660 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 52 selfloop transitions, 17 changer transitions 0/74 dead transitions. [2024-06-20 15:26:16,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 74 transitions, 658 flow [2024-06-20 15:26:16,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:26:16,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:26:16,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-20 15:26:16,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5812807881773399 [2024-06-20 15:26:16,661 INFO L175 Difference]: Start difference. First operand has 79 places, 61 transitions, 486 flow. Second operand 7 states and 118 transitions. [2024-06-20 15:26:16,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 74 transitions, 658 flow [2024-06-20 15:26:16,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 74 transitions, 632 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-20 15:26:16,667 INFO L231 Difference]: Finished difference. Result has 81 places, 62 transitions, 506 flow [2024-06-20 15:26:16,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=460, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=506, PETRI_PLACES=81, PETRI_TRANSITIONS=62} [2024-06-20 15:26:16,667 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 53 predicate places. [2024-06-20 15:26:16,667 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 62 transitions, 506 flow [2024-06-20 15:26:16,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 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) [2024-06-20 15:26:16,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:26:16,668 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:26:16,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-20 15:26:16,668 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)] === [2024-06-20 15:26:16,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:26:16,668 INFO L85 PathProgramCache]: Analyzing trace with hash -178799942, now seen corresponding path program 4 times [2024-06-20 15:26:16,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:26:16,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726116846] [2024-06-20 15:26:16,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:26:16,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:26:16,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:26:16,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:26:16,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:26:16,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726116846] [2024-06-20 15:26:16,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726116846] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:26:16,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:26:16,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:26:16,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187834171] [2024-06-20 15:26:16,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:26:16,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:26:16,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:26:16,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:26:16,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:26:16,800 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-20 15:26:16,801 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 62 transitions, 506 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 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) [2024-06-20 15:26:16,801 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:26:16,801 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-20 15:26:16,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:26:16,884 INFO L124 PetriNetUnfolderBase]: 127/273 cut-off events. [2024-06-20 15:26:16,885 INFO L125 PetriNetUnfolderBase]: For 2204/2204 co-relation queries the response was YES. [2024-06-20 15:26:16,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1231 conditions, 273 events. 127/273 cut-off events. For 2204/2204 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1130 event pairs, 7 based on Foata normal form. 2/274 useless extension candidates. Maximal degree in co-relation 1193. Up to 171 conditions per place. [2024-06-20 15:26:16,886 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 53 selfloop transitions, 18 changer transitions 0/76 dead transitions. [2024-06-20 15:26:16,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 76 transitions, 682 flow [2024-06-20 15:26:16,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:26:16,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:26:16,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-06-20 15:26:16,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6091954022988506 [2024-06-20 15:26:16,888 INFO L175 Difference]: Start difference. First operand has 81 places, 62 transitions, 506 flow. Second operand 6 states and 106 transitions. [2024-06-20 15:26:16,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 76 transitions, 682 flow [2024-06-20 15:26:16,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 76 transitions, 646 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-20 15:26:16,893 INFO L231 Difference]: Finished difference. Result has 82 places, 62 transitions, 514 flow [2024-06-20 15:26:16,893 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=470, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=514, PETRI_PLACES=82, PETRI_TRANSITIONS=62} [2024-06-20 15:26:16,893 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 54 predicate places. [2024-06-20 15:26:16,893 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 62 transitions, 514 flow [2024-06-20 15:26:16,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 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) [2024-06-20 15:26:16,894 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:26:16,894 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:26:16,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-20 15:26:16,894 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)] === [2024-06-20 15:26:16,894 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:26:16,894 INFO L85 PathProgramCache]: Analyzing trace with hash -178615244, now seen corresponding path program 2 times [2024-06-20 15:26:16,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:26:16,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304627206] [2024-06-20 15:26:16,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:26:16,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:26:16,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:26:16,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:26:16,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:26:16,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304627206] [2024-06-20 15:26:16,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304627206] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:26:16,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:26:16,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:26:16,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872307150] [2024-06-20 15:26:16,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:26:16,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:26:16,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:26:16,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:26:16,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:26:17,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-20 15:26:17,010 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 62 transitions, 514 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 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) [2024-06-20 15:26:17,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:26:17,011 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-20 15:26:17,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:26:17,062 INFO L124 PetriNetUnfolderBase]: 131/281 cut-off events. [2024-06-20 15:26:17,062 INFO L125 PetriNetUnfolderBase]: For 2540/2540 co-relation queries the response was YES. [2024-06-20 15:26:17,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1285 conditions, 281 events. 131/281 cut-off events. For 2540/2540 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1179 event pairs, 19 based on Foata normal form. 2/282 useless extension candidates. Maximal degree in co-relation 1246. Up to 200 conditions per place. [2024-06-20 15:26:17,064 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 51 selfloop transitions, 18 changer transitions 0/74 dead transitions. [2024-06-20 15:26:17,064 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 74 transitions, 686 flow [2024-06-20 15:26:17,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:26:17,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:26:17,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 104 transitions. [2024-06-20 15:26:17,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5977011494252874 [2024-06-20 15:26:17,065 INFO L175 Difference]: Start difference. First operand has 82 places, 62 transitions, 514 flow. Second operand 6 states and 104 transitions. [2024-06-20 15:26:17,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 74 transitions, 686 flow [2024-06-20 15:26:17,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 74 transitions, 640 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-20 15:26:17,070 INFO L231 Difference]: Finished difference. Result has 82 places, 63 transitions, 520 flow [2024-06-20 15:26:17,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=468, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=520, PETRI_PLACES=82, PETRI_TRANSITIONS=63} [2024-06-20 15:26:17,071 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 54 predicate places. [2024-06-20 15:26:17,071 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 63 transitions, 520 flow [2024-06-20 15:26:17,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 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) [2024-06-20 15:26:17,071 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:26:17,072 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:26:17,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-20 15:26:17,072 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)] === [2024-06-20 15:26:17,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:26:17,072 INFO L85 PathProgramCache]: Analyzing trace with hash 57560116, now seen corresponding path program 3 times [2024-06-20 15:26:17,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:26:17,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637706551] [2024-06-20 15:26:17,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:26:17,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:26:17,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:26:17,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:26:17,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:26:17,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637706551] [2024-06-20 15:26:17,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637706551] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:26:17,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:26:17,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:26:17,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310250480] [2024-06-20 15:26:17,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:26:17,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:26:17,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:26:17,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:26:17,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:26:17,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-20 15:26:17,208 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 63 transitions, 520 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 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) [2024-06-20 15:26:17,208 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:26:17,208 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-20 15:26:17,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:26:17,281 INFO L124 PetriNetUnfolderBase]: 135/289 cut-off events. [2024-06-20 15:26:17,281 INFO L125 PetriNetUnfolderBase]: For 2294/2294 co-relation queries the response was YES. [2024-06-20 15:26:17,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1306 conditions, 289 events. 135/289 cut-off events. For 2294/2294 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1225 event pairs, 21 based on Foata normal form. 2/290 useless extension candidates. Maximal degree in co-relation 1267. Up to 220 conditions per place. [2024-06-20 15:26:17,283 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 56 selfloop transitions, 13 changer transitions 0/74 dead transitions. [2024-06-20 15:26:17,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 74 transitions, 692 flow [2024-06-20 15:26:17,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:26:17,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:26:17,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 90 transitions. [2024-06-20 15:26:17,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6206896551724138 [2024-06-20 15:26:17,284 INFO L175 Difference]: Start difference. First operand has 82 places, 63 transitions, 520 flow. Second operand 5 states and 90 transitions. [2024-06-20 15:26:17,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 74 transitions, 692 flow [2024-06-20 15:26:17,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 74 transitions, 650 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-20 15:26:17,289 INFO L231 Difference]: Finished difference. Result has 83 places, 64 transitions, 520 flow [2024-06-20 15:26:17,290 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=480, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=520, PETRI_PLACES=83, PETRI_TRANSITIONS=64} [2024-06-20 15:26:17,290 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 55 predicate places. [2024-06-20 15:26:17,290 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 64 transitions, 520 flow [2024-06-20 15:26:17,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 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) [2024-06-20 15:26:17,290 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:26:17,290 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:26:17,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-20 15:26:17,290 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)] === [2024-06-20 15:26:17,291 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:26:17,291 INFO L85 PathProgramCache]: Analyzing trace with hash 57856786, now seen corresponding path program 4 times [2024-06-20 15:26:17,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:26:17,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704214918] [2024-06-20 15:26:17,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:26:17,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:26:17,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:26:17,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:26:17,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:26:17,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704214918] [2024-06-20 15:26:17,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704214918] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:26:17,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:26:17,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:26:17,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903480865] [2024-06-20 15:26:17,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:26:17,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:26:17,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:26:17,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:26:17,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:26:17,419 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-20 15:26:17,419 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 64 transitions, 520 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 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) [2024-06-20 15:26:17,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:26:17,420 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-20 15:26:17,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:26:17,480 INFO L124 PetriNetUnfolderBase]: 132/284 cut-off events. [2024-06-20 15:26:17,481 INFO L125 PetriNetUnfolderBase]: For 1963/1963 co-relation queries the response was YES. [2024-06-20 15:26:17,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1239 conditions, 284 events. 132/284 cut-off events. For 1963/1963 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1196 event pairs, 18 based on Foata normal form. 2/285 useless extension candidates. Maximal degree in co-relation 1199. Up to 201 conditions per place. [2024-06-20 15:26:17,483 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 56 selfloop transitions, 15 changer transitions 0/76 dead transitions. [2024-06-20 15:26:17,483 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 76 transitions, 690 flow [2024-06-20 15:26:17,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:26:17,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:26:17,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 104 transitions. [2024-06-20 15:26:17,484 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5977011494252874 [2024-06-20 15:26:17,484 INFO L175 Difference]: Start difference. First operand has 83 places, 64 transitions, 520 flow. Second operand 6 states and 104 transitions. [2024-06-20 15:26:17,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 76 transitions, 690 flow [2024-06-20 15:26:17,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 76 transitions, 660 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-20 15:26:17,489 INFO L231 Difference]: Finished difference. Result has 86 places, 64 transitions, 524 flow [2024-06-20 15:26:17,489 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=490, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=524, PETRI_PLACES=86, PETRI_TRANSITIONS=64} [2024-06-20 15:26:17,490 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 58 predicate places. [2024-06-20 15:26:17,490 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 64 transitions, 524 flow [2024-06-20 15:26:17,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 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) [2024-06-20 15:26:17,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:26:17,490 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:26:17,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-20 15:26:17,491 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)] === [2024-06-20 15:26:17,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:26:17,491 INFO L85 PathProgramCache]: Analyzing trace with hash -1986850406, now seen corresponding path program 1 times [2024-06-20 15:26:17,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:26:17,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913268754] [2024-06-20 15:26:17,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:26:17,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:26:17,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:26:17,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:26:17,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:26:17,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913268754] [2024-06-20 15:26:17,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913268754] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:26:17,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:26:17,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:26:17,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314056286] [2024-06-20 15:26:17,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:26:17,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:26:17,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:26:17,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:26:17,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:26:17,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-20 15:26:17,610 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 64 transitions, 524 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 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) [2024-06-20 15:26:17,610 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:26:17,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-20 15:26:17,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:26:17,686 INFO L124 PetriNetUnfolderBase]: 155/341 cut-off events. [2024-06-20 15:26:17,687 INFO L125 PetriNetUnfolderBase]: For 3780/3780 co-relation queries the response was YES. [2024-06-20 15:26:17,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1492 conditions, 341 events. 155/341 cut-off events. For 3780/3780 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1532 event pairs, 29 based on Foata normal form. 6/346 useless extension candidates. Maximal degree in co-relation 1451. Up to 118 conditions per place. [2024-06-20 15:26:17,689 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 41 selfloop transitions, 29 changer transitions 12/87 dead transitions. [2024-06-20 15:26:17,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 87 transitions, 786 flow [2024-06-20 15:26:17,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:26:17,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:26:17,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-20 15:26:17,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.603448275862069 [2024-06-20 15:26:17,690 INFO L175 Difference]: Start difference. First operand has 86 places, 64 transitions, 524 flow. Second operand 8 states and 140 transitions. [2024-06-20 15:26:17,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 87 transitions, 786 flow [2024-06-20 15:26:17,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 87 transitions, 736 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-20 15:26:17,697 INFO L231 Difference]: Finished difference. Result has 89 places, 61 transitions, 510 flow [2024-06-20 15:26:17,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=474, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=510, PETRI_PLACES=89, PETRI_TRANSITIONS=61} [2024-06-20 15:26:17,697 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 61 predicate places. [2024-06-20 15:26:17,697 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 61 transitions, 510 flow [2024-06-20 15:26:17,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 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) [2024-06-20 15:26:17,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:26:17,698 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:26:17,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-20 15:26:17,708 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)] === [2024-06-20 15:26:17,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:26:17,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1984972736, now seen corresponding path program 2 times [2024-06-20 15:26:17,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:26:17,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254142485] [2024-06-20 15:26:17,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:26:17,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:26:17,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:26:17,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:26:17,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:26:17,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254142485] [2024-06-20 15:26:17,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254142485] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:26:17,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:26:17,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:26:17,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914596045] [2024-06-20 15:26:17,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:26:17,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:26:17,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:26:17,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:26:17,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:26:17,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-20 15:26:17,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 61 transitions, 510 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 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) [2024-06-20 15:26:17,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:26:17,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-20 15:26:17,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:26:17,901 INFO L124 PetriNetUnfolderBase]: 143/319 cut-off events. [2024-06-20 15:26:17,901 INFO L125 PetriNetUnfolderBase]: For 4487/4487 co-relation queries the response was YES. [2024-06-20 15:26:17,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1417 conditions, 319 events. 143/319 cut-off events. For 4487/4487 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1430 event pairs, 35 based on Foata normal form. 8/326 useless extension candidates. Maximal degree in co-relation 1375. Up to 178 conditions per place. [2024-06-20 15:26:17,903 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 35 selfloop transitions, 28 changer transitions 9/77 dead transitions. [2024-06-20 15:26:17,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 77 transitions, 700 flow [2024-06-20 15:26:17,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:26:17,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:26:17,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-20 15:26:17,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5818965517241379 [2024-06-20 15:26:17,904 INFO L175 Difference]: Start difference. First operand has 89 places, 61 transitions, 510 flow. Second operand 8 states and 135 transitions. [2024-06-20 15:26:17,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 77 transitions, 700 flow [2024-06-20 15:26:17,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 77 transitions, 636 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-20 15:26:17,911 INFO L231 Difference]: Finished difference. Result has 86 places, 58 transitions, 487 flow [2024-06-20 15:26:17,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=448, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=487, PETRI_PLACES=86, PETRI_TRANSITIONS=58} [2024-06-20 15:26:17,912 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 58 predicate places. [2024-06-20 15:26:17,913 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 58 transitions, 487 flow [2024-06-20 15:26:17,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 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) [2024-06-20 15:26:17,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:26:17,913 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:26:17,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-20 15:26:17,913 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)] === [2024-06-20 15:26:17,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:26:17,914 INFO L85 PathProgramCache]: Analyzing trace with hash 866193436, now seen corresponding path program 3 times [2024-06-20 15:26:17,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:26:17,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049533849] [2024-06-20 15:26:17,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:26:17,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:26:17,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:26:18,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:26:18,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:26:18,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049533849] [2024-06-20 15:26:18,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049533849] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:26:18,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:26:18,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:26:18,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799025380] [2024-06-20 15:26:18,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:26:18,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:26:18,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:26:18,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:26:18,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:26:18,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-20 15:26:18,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 58 transitions, 487 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 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) [2024-06-20 15:26:18,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:26:18,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-20 15:26:18,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:26:18,093 INFO L124 PetriNetUnfolderBase]: 134/302 cut-off events. [2024-06-20 15:26:18,094 INFO L125 PetriNetUnfolderBase]: For 3364/3364 co-relation queries the response was YES. [2024-06-20 15:26:18,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1324 conditions, 302 events. 134/302 cut-off events. For 3364/3364 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1320 event pairs, 29 based on Foata normal form. 6/307 useless extension candidates. Maximal degree in co-relation 1284. Up to 168 conditions per place. [2024-06-20 15:26:18,095 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 30 selfloop transitions, 25 changer transitions 14/74 dead transitions. [2024-06-20 15:26:18,096 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 74 transitions, 665 flow [2024-06-20 15:26:18,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:26:18,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:26:18,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-20 15:26:18,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5732758620689655 [2024-06-20 15:26:18,097 INFO L175 Difference]: Start difference. First operand has 86 places, 58 transitions, 487 flow. Second operand 8 states and 133 transitions. [2024-06-20 15:26:18,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 74 transitions, 665 flow [2024-06-20 15:26:18,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 74 transitions, 605 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-20 15:26:18,102 INFO L231 Difference]: Finished difference. Result has 84 places, 54 transitions, 441 flow [2024-06-20 15:26:18,102 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=427, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=441, PETRI_PLACES=84, PETRI_TRANSITIONS=54} [2024-06-20 15:26:18,105 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 56 predicate places. [2024-06-20 15:26:18,105 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 54 transitions, 441 flow [2024-06-20 15:26:18,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 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) [2024-06-20 15:26:18,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:26:18,105 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:26:18,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-20 15:26:18,106 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)] === [2024-06-20 15:26:18,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:26:18,106 INFO L85 PathProgramCache]: Analyzing trace with hash -762257502, now seen corresponding path program 4 times [2024-06-20 15:26:18,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:26:18,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180420045] [2024-06-20 15:26:18,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:26:18,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:26:18,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:26:18,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:26:18,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:26:18,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180420045] [2024-06-20 15:26:18,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180420045] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:26:18,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:26:18,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:26:18,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140046078] [2024-06-20 15:26:18,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:26:18,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:26:18,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:26:18,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:26:18,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:26:18,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-20 15:26:18,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 54 transitions, 441 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 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) [2024-06-20 15:26:18,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:26:18,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-20 15:26:18,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:26:18,353 INFO L124 PetriNetUnfolderBase]: 127/279 cut-off events. [2024-06-20 15:26:18,353 INFO L125 PetriNetUnfolderBase]: For 3291/3291 co-relation queries the response was YES. [2024-06-20 15:26:18,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1212 conditions, 279 events. 127/279 cut-off events. For 3291/3291 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1208 event pairs, 33 based on Foata normal form. 8/286 useless extension candidates. Maximal degree in co-relation 1173. Up to 176 conditions per place. [2024-06-20 15:26:18,355 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 37 selfloop transitions, 18 changer transitions 9/69 dead transitions. [2024-06-20 15:26:18,355 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 69 transitions, 609 flow [2024-06-20 15:26:18,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:26:18,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:26:18,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 158 transitions. [2024-06-20 15:26:18,356 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5448275862068965 [2024-06-20 15:26:18,356 INFO L175 Difference]: Start difference. First operand has 84 places, 54 transitions, 441 flow. Second operand 10 states and 158 transitions. [2024-06-20 15:26:18,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 69 transitions, 609 flow [2024-06-20 15:26:18,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 69 transitions, 549 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-20 15:26:18,361 INFO L231 Difference]: Finished difference. Result has 81 places, 51 transitions, 396 flow [2024-06-20 15:26:18,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=381, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=396, PETRI_PLACES=81, PETRI_TRANSITIONS=51} [2024-06-20 15:26:18,363 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 53 predicate places. [2024-06-20 15:26:18,363 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 51 transitions, 396 flow [2024-06-20 15:26:18,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 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) [2024-06-20 15:26:18,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:26:18,364 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:26:18,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-20 15:26:18,364 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)] === [2024-06-20 15:26:18,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:26:18,365 INFO L85 PathProgramCache]: Analyzing trace with hash 1681467076, now seen corresponding path program 1 times [2024-06-20 15:26:18,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:26:18,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885121977] [2024-06-20 15:26:18,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:26:18,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:26:18,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:26:18,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:26:18,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:26:18,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885121977] [2024-06-20 15:26:18,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885121977] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:26:18,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:26:18,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:26:18,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859882173] [2024-06-20 15:26:18,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:26:18,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:26:18,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:26:18,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:26:18,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:26:18,505 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-20 15:26:18,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 51 transitions, 396 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 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) [2024-06-20 15:26:18,506 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:26:18,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-20 15:26:18,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:26:18,580 INFO L124 PetriNetUnfolderBase]: 140/314 cut-off events. [2024-06-20 15:26:18,580 INFO L125 PetriNetUnfolderBase]: For 3189/3189 co-relation queries the response was YES. [2024-06-20 15:26:18,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1336 conditions, 314 events. 140/314 cut-off events. For 3189/3189 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1443 event pairs, 43 based on Foata normal form. 6/319 useless extension candidates. Maximal degree in co-relation 1299. Up to 162 conditions per place. [2024-06-20 15:26:18,582 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 41 selfloop transitions, 16 changer transitions 8/70 dead transitions. [2024-06-20 15:26:18,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 70 transitions, 606 flow [2024-06-20 15:26:18,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:26:18,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:26:18,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 160 transitions. [2024-06-20 15:26:18,583 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5517241379310345 [2024-06-20 15:26:18,583 INFO L175 Difference]: Start difference. First operand has 81 places, 51 transitions, 396 flow. Second operand 10 states and 160 transitions. [2024-06-20 15:26:18,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 70 transitions, 606 flow [2024-06-20 15:26:18,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 70 transitions, 562 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-20 15:26:18,587 INFO L231 Difference]: Finished difference. Result has 80 places, 48 transitions, 363 flow [2024-06-20 15:26:18,588 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=354, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=363, PETRI_PLACES=80, PETRI_TRANSITIONS=48} [2024-06-20 15:26:18,588 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 52 predicate places. [2024-06-20 15:26:18,588 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 48 transitions, 363 flow [2024-06-20 15:26:18,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 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) [2024-06-20 15:26:18,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:26:18,589 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:26:18,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-20 15:26:18,589 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)] === [2024-06-20 15:26:18,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:26:18,589 INFO L85 PathProgramCache]: Analyzing trace with hash 1675895446, now seen corresponding path program 2 times [2024-06-20 15:26:18,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:26:18,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484741093] [2024-06-20 15:26:18,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:26:18,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:26:18,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:26:18,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:26:18,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:26:18,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484741093] [2024-06-20 15:26:18,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484741093] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:26:18,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:26:18,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:26:18,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958668781] [2024-06-20 15:26:18,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:26:18,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:26:18,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:26:18,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:26:18,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:26:18,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-20 15:26:18,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 48 transitions, 363 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 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) [2024-06-20 15:26:18,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:26:18,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-20 15:26:18,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:26:18,782 INFO L124 PetriNetUnfolderBase]: 115/257 cut-off events. [2024-06-20 15:26:18,782 INFO L125 PetriNetUnfolderBase]: For 2563/2563 co-relation queries the response was YES. [2024-06-20 15:26:18,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1064 conditions, 257 events. 115/257 cut-off events. For 2563/2563 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1088 event pairs, 35 based on Foata normal form. 8/264 useless extension candidates. Maximal degree in co-relation 1027. Up to 162 conditions per place. [2024-06-20 15:26:18,784 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 34 selfloop transitions, 13 changer transitions 9/61 dead transitions. [2024-06-20 15:26:18,784 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 61 transitions, 511 flow [2024-06-20 15:26:18,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:26:18,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:26:18,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-20 15:26:18,785 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5560344827586207 [2024-06-20 15:26:18,785 INFO L175 Difference]: Start difference. First operand has 80 places, 48 transitions, 363 flow. Second operand 8 states and 129 transitions. [2024-06-20 15:26:18,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 61 transitions, 511 flow [2024-06-20 15:26:18,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 61 transitions, 468 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-20 15:26:18,790 INFO L231 Difference]: Finished difference. Result has 75 places, 45 transitions, 321 flow [2024-06-20 15:26:18,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=320, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=321, PETRI_PLACES=75, PETRI_TRANSITIONS=45} [2024-06-20 15:26:18,790 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 47 predicate places. [2024-06-20 15:26:18,790 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 45 transitions, 321 flow [2024-06-20 15:26:18,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 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) [2024-06-20 15:26:18,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:26:18,791 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:26:18,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-20 15:26:18,791 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)] === [2024-06-20 15:26:18,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:26:18,791 INFO L85 PathProgramCache]: Analyzing trace with hash 1675741624, now seen corresponding path program 5 times [2024-06-20 15:26:18,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:26:18,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862612106] [2024-06-20 15:26:18,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:26:18,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:26:18,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:26:18,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:26:18,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:26:18,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862612106] [2024-06-20 15:26:18,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862612106] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:26:18,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:26:18,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:26:18,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21261050] [2024-06-20 15:26:18,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:26:18,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:26:18,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:26:18,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:26:18,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:26:18,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-20 15:26:18,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 45 transitions, 321 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 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) [2024-06-20 15:26:18,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:26:18,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-20 15:26:18,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:26:18,997 INFO L124 PetriNetUnfolderBase]: 106/242 cut-off events. [2024-06-20 15:26:18,997 INFO L125 PetriNetUnfolderBase]: For 2289/2289 co-relation queries the response was YES. [2024-06-20 15:26:18,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 982 conditions, 242 events. 106/242 cut-off events. For 2289/2289 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 982 event pairs, 29 based on Foata normal form. 6/247 useless extension candidates. Maximal degree in co-relation 946. Up to 152 conditions per place. [2024-06-20 15:26:18,999 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 28 selfloop transitions, 9 changer transitions 16/58 dead transitions. [2024-06-20 15:26:18,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 58 transitions, 459 flow [2024-06-20 15:26:18,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:26:18,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:26:19,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-20 15:26:19,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5474137931034483 [2024-06-20 15:26:19,000 INFO L175 Difference]: Start difference. First operand has 75 places, 45 transitions, 321 flow. Second operand 8 states and 127 transitions. [2024-06-20 15:26:19,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 58 transitions, 459 flow [2024-06-20 15:26:19,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 58 transitions, 419 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-20 15:26:19,004 INFO L231 Difference]: Finished difference. Result has 72 places, 40 transitions, 256 flow [2024-06-20 15:26:19,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=281, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=256, PETRI_PLACES=72, PETRI_TRANSITIONS=40} [2024-06-20 15:26:19,005 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 44 predicate places. [2024-06-20 15:26:19,005 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 40 transitions, 256 flow [2024-06-20 15:26:19,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 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) [2024-06-20 15:26:19,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:26:19,006 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:26:19,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-20 15:26:19,006 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)] === [2024-06-20 15:26:19,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:26:19,006 INFO L85 PathProgramCache]: Analyzing trace with hash 1527654248, now seen corresponding path program 3 times [2024-06-20 15:26:19,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:26:19,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056018012] [2024-06-20 15:26:19,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:26:19,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:26:19,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:26:19,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:26:19,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:26:19,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056018012] [2024-06-20 15:26:19,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056018012] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:26:19,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:26:19,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:26:19,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128425243] [2024-06-20 15:26:19,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:26:19,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:26:19,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:26:19,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:26:19,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:26:19,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-20 15:26:19,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 40 transitions, 256 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 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) [2024-06-20 15:26:19,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:26:19,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-20 15:26:19,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:26:19,208 INFO L124 PetriNetUnfolderBase]: 98/219 cut-off events. [2024-06-20 15:26:19,208 INFO L125 PetriNetUnfolderBase]: For 2335/2335 co-relation queries the response was YES. [2024-06-20 15:26:19,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 861 conditions, 219 events. 98/219 cut-off events. For 2335/2335 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 897 event pairs, 33 based on Foata normal form. 8/227 useless extension candidates. Maximal degree in co-relation 826. Up to 139 conditions per place. [2024-06-20 15:26:19,209 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 27 selfloop transitions, 10 changer transitions 6/48 dead transitions. [2024-06-20 15:26:19,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 48 transitions, 366 flow [2024-06-20 15:26:19,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:26:19,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:26:19,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 99 transitions. [2024-06-20 15:26:19,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5689655172413793 [2024-06-20 15:26:19,210 INFO L175 Difference]: Start difference. First operand has 72 places, 40 transitions, 256 flow. Second operand 6 states and 99 transitions. [2024-06-20 15:26:19,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 48 transitions, 366 flow [2024-06-20 15:26:19,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 48 transitions, 335 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-20 15:26:19,213 INFO L231 Difference]: Finished difference. Result has 62 places, 37 transitions, 228 flow [2024-06-20 15:26:19,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=225, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=228, PETRI_PLACES=62, PETRI_TRANSITIONS=37} [2024-06-20 15:26:19,214 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 34 predicate places. [2024-06-20 15:26:19,214 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 37 transitions, 228 flow [2024-06-20 15:26:19,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 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) [2024-06-20 15:26:19,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:26:19,221 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:26:19,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-20 15:26:19,221 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)] === [2024-06-20 15:26:19,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:26:19,222 INFO L85 PathProgramCache]: Analyzing trace with hash 1784364008, now seen corresponding path program 4 times [2024-06-20 15:26:19,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:26:19,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034923359] [2024-06-20 15:26:19,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:26:19,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:26:19,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:26:19,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:26:19,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:26:19,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034923359] [2024-06-20 15:26:19,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034923359] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:26:19,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:26:19,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:26:19,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427813296] [2024-06-20 15:26:19,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:26:19,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:26:19,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:26:19,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:26:19,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:26:19,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-20 15:26:19,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 37 transitions, 228 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 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) [2024-06-20 15:26:19,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:26:19,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-20 15:26:19,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:26:19,418 INFO L124 PetriNetUnfolderBase]: 89/206 cut-off events. [2024-06-20 15:26:19,418 INFO L125 PetriNetUnfolderBase]: For 1844/1844 co-relation queries the response was YES. [2024-06-20 15:26:19,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 785 conditions, 206 events. 89/206 cut-off events. For 1844/1844 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 819 event pairs, 29 based on Foata normal form. 6/212 useless extension candidates. Maximal degree in co-relation 754. Up to 129 conditions per place. [2024-06-20 15:26:19,419 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 26 selfloop transitions, 7 changer transitions 8/46 dead transitions. [2024-06-20 15:26:19,419 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 46 transitions, 332 flow [2024-06-20 15:26:19,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:26:19,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:26:19,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 99 transitions. [2024-06-20 15:26:19,420 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5689655172413793 [2024-06-20 15:26:19,420 INFO L175 Difference]: Start difference. First operand has 62 places, 37 transitions, 228 flow. Second operand 6 states and 99 transitions. [2024-06-20 15:26:19,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 46 transitions, 332 flow [2024-06-20 15:26:19,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 46 transitions, 297 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-06-20 15:26:19,423 INFO L231 Difference]: Finished difference. Result has 59 places, 34 transitions, 192 flow [2024-06-20 15:26:19,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=193, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=192, PETRI_PLACES=59, PETRI_TRANSITIONS=34} [2024-06-20 15:26:19,425 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 31 predicate places. [2024-06-20 15:26:19,425 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 34 transitions, 192 flow [2024-06-20 15:26:19,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 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) [2024-06-20 15:26:19,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:26:19,425 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:26:19,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-20 15:26:19,425 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)] === [2024-06-20 15:26:19,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:26:19,426 INFO L85 PathProgramCache]: Analyzing trace with hash -1981605324, now seen corresponding path program 5 times [2024-06-20 15:26:19,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:26:19,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245282236] [2024-06-20 15:26:19,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:26:19,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:26:19,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:26:19,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:26:19,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:26:19,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245282236] [2024-06-20 15:26:19,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245282236] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:26:19,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:26:19,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:26:19,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441908471] [2024-06-20 15:26:19,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:26:19,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:26:19,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:26:19,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:26:19,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:26:19,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-20 15:26:19,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 34 transitions, 192 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 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) [2024-06-20 15:26:19,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:26:19,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-20 15:26:19,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:26:19,646 INFO L124 PetriNetUnfolderBase]: 82/193 cut-off events. [2024-06-20 15:26:19,646 INFO L125 PetriNetUnfolderBase]: For 1805/1805 co-relation queries the response was YES. [2024-06-20 15:26:19,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 719 conditions, 193 events. 82/193 cut-off events. For 1805/1805 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 752 event pairs, 27 based on Foata normal form. 6/199 useless extension candidates. Maximal degree in co-relation 690. Up to 111 conditions per place. [2024-06-20 15:26:19,647 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 23 selfloop transitions, 6 changer transitions 11/45 dead transitions. [2024-06-20 15:26:19,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 45 transitions, 298 flow [2024-06-20 15:26:19,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:26:19,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:26:19,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 111 transitions. [2024-06-20 15:26:19,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5467980295566502 [2024-06-20 15:26:19,649 INFO L175 Difference]: Start difference. First operand has 59 places, 34 transitions, 192 flow. Second operand 7 states and 111 transitions. [2024-06-20 15:26:19,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 45 transitions, 298 flow [2024-06-20 15:26:19,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 45 transitions, 274 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-20 15:26:19,651 INFO L231 Difference]: Finished difference. Result has 56 places, 30 transitions, 164 flow [2024-06-20 15:26:19,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=164, PETRI_PLACES=56, PETRI_TRANSITIONS=30} [2024-06-20 15:26:19,651 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 28 predicate places. [2024-06-20 15:26:19,651 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 30 transitions, 164 flow [2024-06-20 15:26:19,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 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) [2024-06-20 15:26:19,652 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:26:19,652 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:26:19,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-20 15:26:19,652 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)] === [2024-06-20 15:26:19,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:26:19,653 INFO L85 PathProgramCache]: Analyzing trace with hash -1247676486, now seen corresponding path program 6 times [2024-06-20 15:26:19,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:26:19,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986092273] [2024-06-20 15:26:19,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:26:19,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:26:19,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:26:19,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:26:19,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:26:19,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986092273] [2024-06-20 15:26:19,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986092273] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:26:19,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:26:19,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:26:19,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806722876] [2024-06-20 15:26:19,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:26:19,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:26:19,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:26:19,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:26:19,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:26:19,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-20 15:26:19,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 30 transitions, 164 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 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) [2024-06-20 15:26:19,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:26:19,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-20 15:26:19,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:26:19,867 INFO L124 PetriNetUnfolderBase]: 75/176 cut-off events. [2024-06-20 15:26:19,868 INFO L125 PetriNetUnfolderBase]: For 1713/1717 co-relation queries the response was YES. [2024-06-20 15:26:19,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 659 conditions, 176 events. 75/176 cut-off events. For 1713/1717 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 684 event pairs, 32 based on Foata normal form. 12/188 useless extension candidates. Maximal degree in co-relation 632. Up to 104 conditions per place. [2024-06-20 15:26:19,869 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 17 selfloop transitions, 8 changer transitions 9/39 dead transitions. [2024-06-20 15:26:19,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 39 transitions, 258 flow [2024-06-20 15:26:19,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:26:19,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:26:19,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 110 transitions. [2024-06-20 15:26:19,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.541871921182266 [2024-06-20 15:26:19,870 INFO L175 Difference]: Start difference. First operand has 56 places, 30 transitions, 164 flow. Second operand 7 states and 110 transitions. [2024-06-20 15:26:19,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 39 transitions, 258 flow [2024-06-20 15:26:19,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 39 transitions, 232 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-20 15:26:19,873 INFO L231 Difference]: Finished difference. Result has 49 places, 27 transitions, 139 flow [2024-06-20 15:26:19,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=139, PETRI_PLACES=49, PETRI_TRANSITIONS=27} [2024-06-20 15:26:19,873 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 21 predicate places. [2024-06-20 15:26:19,873 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 27 transitions, 139 flow [2024-06-20 15:26:19,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 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) [2024-06-20 15:26:19,873 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:26:19,874 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:26:19,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-20 15:26:19,874 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)] === [2024-06-20 15:26:19,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:26:19,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1247830308, now seen corresponding path program 6 times [2024-06-20 15:26:19,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:26:19,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507126550] [2024-06-20 15:26:19,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:26:19,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:26:19,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:26:19,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:26:19,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:26:19,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507126550] [2024-06-20 15:26:19,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507126550] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:26:19,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:26:19,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:26:19,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673729885] [2024-06-20 15:26:19,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:26:19,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:26:19,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:26:19,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:26:19,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:26:20,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-20 15:26:20,029 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 27 transitions, 139 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 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) [2024-06-20 15:26:20,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:26:20,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-20 15:26:20,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:26:20,098 INFO L124 PetriNetUnfolderBase]: 66/161 cut-off events. [2024-06-20 15:26:20,098 INFO L125 PetriNetUnfolderBase]: For 1067/1067 co-relation queries the response was YES. [2024-06-20 15:26:20,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 573 conditions, 161 events. 66/161 cut-off events. For 1067/1067 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 597 event pairs, 26 based on Foata normal form. 6/167 useless extension candidates. Maximal degree in co-relation 550. Up to 56 conditions per place. [2024-06-20 15:26:20,099 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 21 selfloop transitions, 6 changer transitions 7/39 dead transitions. [2024-06-20 15:26:20,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 39 transitions, 259 flow [2024-06-20 15:26:20,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:26:20,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:26:20,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 110 transitions. [2024-06-20 15:26:20,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.541871921182266 [2024-06-20 15:26:20,100 INFO L175 Difference]: Start difference. First operand has 49 places, 27 transitions, 139 flow. Second operand 7 states and 110 transitions. [2024-06-20 15:26:20,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 39 transitions, 259 flow [2024-06-20 15:26:20,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 39 transitions, 235 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-20 15:26:20,102 INFO L231 Difference]: Finished difference. Result has 47 places, 24 transitions, 117 flow [2024-06-20 15:26:20,102 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=119, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=117, PETRI_PLACES=47, PETRI_TRANSITIONS=24} [2024-06-20 15:26:20,102 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 19 predicate places. [2024-06-20 15:26:20,103 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 24 transitions, 117 flow [2024-06-20 15:26:20,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 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) [2024-06-20 15:26:20,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:26:20,103 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:26:20,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-20 15:26:20,103 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)] === [2024-06-20 15:26:20,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:26:20,104 INFO L85 PathProgramCache]: Analyzing trace with hash 431425198, now seen corresponding path program 7 times [2024-06-20 15:26:20,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:26:20,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081954155] [2024-06-20 15:26:20,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:26:20,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:26:20,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:26:20,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:26:20,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:26:20,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081954155] [2024-06-20 15:26:20,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081954155] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:26:20,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:26:20,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:26:20,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448975071] [2024-06-20 15:26:20,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:26:20,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:26:20,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:26:20,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:26:20,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:26:20,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-20 15:26:20,254 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 24 transitions, 117 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 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) [2024-06-20 15:26:20,254 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:26:20,254 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-20 15:26:20,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:26:20,317 INFO L124 PetriNetUnfolderBase]: 41/104 cut-off events. [2024-06-20 15:26:20,317 INFO L125 PetriNetUnfolderBase]: For 617/617 co-relation queries the response was YES. [2024-06-20 15:26:20,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 342 conditions, 104 events. 41/104 cut-off events. For 617/617 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 295 event pairs, 18 based on Foata normal form. 8/112 useless extension candidates. Maximal degree in co-relation 320. Up to 44 conditions per place. [2024-06-20 15:26:20,318 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 14 selfloop transitions, 4 changer transitions 9/32 dead transitions. [2024-06-20 15:26:20,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 32 transitions, 191 flow [2024-06-20 15:26:20,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:26:20,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:26:20,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 105 transitions. [2024-06-20 15:26:20,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5172413793103449 [2024-06-20 15:26:20,319 INFO L175 Difference]: Start difference. First operand has 47 places, 24 transitions, 117 flow. Second operand 7 states and 105 transitions. [2024-06-20 15:26:20,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 32 transitions, 191 flow [2024-06-20 15:26:20,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 32 transitions, 173 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-20 15:26:20,320 INFO L231 Difference]: Finished difference. Result has 44 places, 20 transitions, 86 flow [2024-06-20 15:26:20,321 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=99, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=86, PETRI_PLACES=44, PETRI_TRANSITIONS=20} [2024-06-20 15:26:20,321 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 16 predicate places. [2024-06-20 15:26:20,321 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 20 transitions, 86 flow [2024-06-20 15:26:20,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 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) [2024-06-20 15:26:20,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:26:20,321 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:26:20,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-20 15:26:20,322 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)] === [2024-06-20 15:26:20,322 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:26:20,322 INFO L85 PathProgramCache]: Analyzing trace with hash 431640400, now seen corresponding path program 7 times [2024-06-20 15:26:20,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:26:20,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959052686] [2024-06-20 15:26:20,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:26:20,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:26:20,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:26:20,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:26:20,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:26:20,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959052686] [2024-06-20 15:26:20,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959052686] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:26:20,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:26:20,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:26:20,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384263569] [2024-06-20 15:26:20,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:26:20,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:26:20,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:26:20,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:26:20,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:26:20,453 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-20 15:26:20,453 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 20 transitions, 86 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 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) [2024-06-20 15:26:20,453 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:26:20,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-20 15:26:20,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:26:20,497 INFO L124 PetriNetUnfolderBase]: 17/54 cut-off events. [2024-06-20 15:26:20,497 INFO L125 PetriNetUnfolderBase]: For 173/173 co-relation queries the response was YES. [2024-06-20 15:26:20,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148 conditions, 54 events. 17/54 cut-off events. For 173/173 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 79 event pairs, 1 based on Foata normal form. 6/60 useless extension candidates. Maximal degree in co-relation 136. Up to 24 conditions per place. [2024-06-20 15:26:20,497 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 0 selfloop transitions, 0 changer transitions 24/24 dead transitions. [2024-06-20 15:26:20,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 24 transitions, 118 flow [2024-06-20 15:26:20,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:26:20,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:26:20,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 97 transitions. [2024-06-20 15:26:20,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47783251231527096 [2024-06-20 15:26:20,498 INFO L175 Difference]: Start difference. First operand has 44 places, 20 transitions, 86 flow. Second operand 7 states and 97 transitions. [2024-06-20 15:26:20,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 24 transitions, 118 flow [2024-06-20 15:26:20,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 24 transitions, 94 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-20 15:26:20,499 INFO L231 Difference]: Finished difference. Result has 33 places, 0 transitions, 0 flow [2024-06-20 15:26:20,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=0, PETRI_PLACES=33, PETRI_TRANSITIONS=0} [2024-06-20 15:26:20,500 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 5 predicate places. [2024-06-20 15:26:20,500 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 0 transitions, 0 flow [2024-06-20 15:26:20,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 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) [2024-06-20 15:26:20,502 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 4 remaining) [2024-06-20 15:26:20,502 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 4 remaining) [2024-06-20 15:26:20,504 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2024-06-20 15:26:20,504 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2024-06-20 15:26:20,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-20 15:26:20,505 INFO L445 BasicCegarLoop]: Path program histogram: [7, 7, 6, 4, 4, 3, 3, 1, 1, 1, 1, 1] [2024-06-20 15:26:20,507 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-06-20 15:26:20,507 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-06-20 15:26:20,510 INFO L507 ceAbstractionStarter]: Automizer considered 2 witness invariants [2024-06-20 15:26:20,510 INFO L508 ceAbstractionStarter]: WitnessConsidered=2 [2024-06-20 15:26:20,511 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.06 03:26:20 BasicIcfg [2024-06-20 15:26:20,511 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-06-20 15:26:20,511 INFO L158 Benchmark]: Toolchain (without parser) took 9344.02ms. Allocated memory was 153.1MB in the beginning and 302.0MB in the end (delta: 148.9MB). Free memory was 123.0MB in the beginning and 261.0MB in the end (delta: -138.0MB). Peak memory consumption was 11.6MB. Max. memory is 16.1GB. [2024-06-20 15:26:20,511 INFO L158 Benchmark]: Witness Parser took 0.15ms. Allocated memory is still 153.1MB. Free memory is still 128.4MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-20 15:26:20,511 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 153.1MB. Free memory is still 125.0MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-20 15:26:20,512 INFO L158 Benchmark]: CACSL2BoogieTranslator took 422.41ms. Allocated memory is still 153.1MB. Free memory was 122.6MB in the beginning and 96.9MB in the end (delta: 25.8MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2024-06-20 15:26:20,512 INFO L158 Benchmark]: Boogie Procedure Inliner took 53.49ms. Allocated memory is still 153.1MB. Free memory was 96.9MB in the beginning and 94.8MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-20 15:26:20,512 INFO L158 Benchmark]: Boogie Preprocessor took 55.93ms. Allocated memory is still 153.1MB. Free memory was 94.8MB in the beginning and 92.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-20 15:26:20,512 INFO L158 Benchmark]: RCFGBuilder took 307.80ms. Allocated memory is still 153.1MB. Free memory was 92.7MB in the beginning and 71.2MB in the end (delta: 21.5MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. [2024-06-20 15:26:20,512 INFO L158 Benchmark]: TraceAbstraction took 8498.81ms. Allocated memory was 153.1MB in the beginning and 302.0MB in the end (delta: 148.9MB). Free memory was 70.7MB in the beginning and 261.0MB in the end (delta: -190.3MB). There was no memory consumed. Max. memory is 16.1GB. [2024-06-20 15:26:20,516 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 153.1MB. Free memory is still 128.4MB. There was no memory consumed. Max. memory is 16.1GB. * CDTParser took 0.11ms. Allocated memory is still 153.1MB. Free memory is still 125.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 422.41ms. Allocated memory is still 153.1MB. Free memory was 122.6MB in the beginning and 96.9MB in the end (delta: 25.8MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 53.49ms. Allocated memory is still 153.1MB. Free memory was 96.9MB in the beginning and 94.8MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 55.93ms. Allocated memory is still 153.1MB. Free memory was 94.8MB in the beginning and 92.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 307.80ms. Allocated memory is still 153.1MB. Free memory was 92.7MB in the beginning and 71.2MB in the end (delta: 21.5MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. * TraceAbstraction took 8498.81ms. Allocated memory was 153.1MB in the beginning and 302.0MB in the end (delta: 148.9MB). Free memory was 70.7MB in the beginning and 261.0MB in the end (delta: -190.3MB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 763]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 764]: 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, 46 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: 8.4s, OverallIterations: 39, TraceHistogramMax: 1, PathProgramHistogramMax: 7, EmptinessCheckTime: 0.0s, AutomataDifference: 4.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1828 SdHoareTripleChecker+Valid, 2.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1371 mSDsluCounter, 344 SdHoareTripleChecker+Invalid, 2.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 205 mSDsCounter, 226 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 5941 IncrementalHoareTripleChecker+Invalid, 6167 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 226 mSolverCounterUnsat, 139 mSDtfsCounter, 5941 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 229 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 1.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=524occurred in iteration=25, InterpolantAutomatonStates: 254, 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, 3.8s InterpolantComputationTime, 549 NumberOfCodeBlocks, 549 NumberOfCodeBlocksAsserted, 39 NumberOfCheckSat, 510 ConstructedInterpolants, 0 QuantifiedInterpolants, 5005 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 39 InterpolantComputations, 39 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! [2024-06-20 15:26:20,536 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE