./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread/fib_unsafe-10.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-06-19_11-23-25.files/protection/fib_unsafe-10.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread/fib_unsafe-10.i ./goblint.2024-06-19_11-23-25.files/protection/fib_unsafe-10.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 18:05:48,969 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 18:05:49,009 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 18:05:49,017 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 18:05:49,018 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 18:05:49,049 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 18:05:49,052 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 18:05:49,052 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 18:05:49,053 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 18:05:49,056 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 18:05:49,056 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 18:05:49,056 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 18:05:49,057 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 18:05:49,059 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 18:05:49,059 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 18:05:49,059 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 18:05:49,059 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 18:05:49,059 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 18:05:49,060 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 18:05:49,060 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 18:05:49,060 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 18:05:49,060 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 18:05:49,060 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 18:05:49,061 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 18:05:49,061 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 18:05:49,061 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 18:05:49,061 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 18:05:49,061 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 18:05:49,062 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 18:05:49,062 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 18:05:49,063 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 18:05:49,063 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 18:05:49,063 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 18:05:49,063 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 18:05:49,063 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 18:05:49,064 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 18:05:49,064 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 18:05:49,064 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 18:05:49,064 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 18:05:49,064 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 18:05:49,064 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 18:05:49,065 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 18:05:49,065 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 18:05:49,065 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-06-27 18:05:49,291 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 18:05:49,309 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 18:05:49,311 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 18:05:49,312 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 18:05:49,312 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 18:05:49,313 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_unsafe-10.i [2024-06-27 18:05:50,366 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 18:05:50,549 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 18:05:50,550 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_unsafe-10.i [2024-06-27 18:05:50,563 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e3119a5e/96384982a0824250a9dde40104eab6ce/FLAG2bda1b20e [2024-06-27 18:05:50,934 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e3119a5e/96384982a0824250a9dde40104eab6ce [2024-06-27 18:05:50,936 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 18:05:50,939 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 18:05:50,940 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/fib_unsafe-10.yml/witness.yml [2024-06-27 18:05:51,055 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 18:05:51,057 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 18:05:51,059 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 18:05:51,072 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 18:05:51,077 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 18:05:51,077 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 06:05:50" (1/2) ... [2024-06-27 18:05:51,078 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a80c41b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:05:51, skipping insertion in model container [2024-06-27 18:05:51,079 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 06:05:50" (1/2) ... [2024-06-27 18:05:51,080 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@35c61c9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:05:51, skipping insertion in model container [2024-06-27 18:05:51,080 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 06:05:51" (2/2) ... [2024-06-27 18:05:51,080 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a80c41b and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:05:51, skipping insertion in model container [2024-06-27 18:05:51,081 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 06:05:51" (2/2) ... [2024-06-27 18:05:51,081 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 18:05:51,128 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 18:05:51,130 INFO L97 edCorrectnessWitness]: Location invariant before [L722-L722] (((((((! multithreaded || 0 <= next) && (! multithreaded || 0 <= q)) && (! multithreaded || 0 <= x)) && (! multithreaded || 0 <= p)) && (! multithreaded || 0 <= prev)) && (! multithreaded || 0 <= cur)) && (! multithreaded || 1 <= j)) && (! multithreaded || 1 <= i) [2024-06-27 18:05:51,130 INFO L97 edCorrectnessWitness]: Location invariant before [L721-L721] (((((((! multithreaded || 0 <= next) && (! multithreaded || 0 <= q)) && (! multithreaded || 0 <= x)) && (! multithreaded || 0 <= p)) && (! multithreaded || 0 <= prev)) && (! multithreaded || 0 <= cur)) && (! multithreaded || 1 <= j)) && (! multithreaded || 1 <= i) [2024-06-27 18:05:51,130 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 18:05:51,130 INFO L106 edCorrectnessWitness]: ghost_update [L720-L720] multithreaded = 1; [2024-06-27 18:05:51,169 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 18:05:51,421 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_unsafe-10.i[30243,30256] [2024-06-27 18:05:51,450 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 18:05:51,457 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local [2024-06-27 18:05:51,534 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_unsafe-10.i[30243,30256] Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 18:05:51,552 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 18:05:51,584 INFO L206 MainTranslator]: Completed translation [2024-06-27 18:05:51,585 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:05:51 WrapperNode [2024-06-27 18:05:51,585 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 18:05:51,586 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 18:05:51,587 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 18:05:51,587 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 18:05:51,593 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:05:51" (1/1) ... [2024-06-27 18:05:51,619 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:05:51" (1/1) ... [2024-06-27 18:05:51,645 INFO L138 Inliner]: procedures = 164, calls = 20, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 71 [2024-06-27 18:05:51,646 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 18:05:51,646 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 18:05:51,646 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 18:05:51,647 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 18:05:51,654 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:05:51" (1/1) ... [2024-06-27 18:05:51,654 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:05:51" (1/1) ... [2024-06-27 18:05:51,661 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:05:51" (1/1) ... [2024-06-27 18:05:51,681 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]. [2024-06-27 18:05:51,681 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:05:51" (1/1) ... [2024-06-27 18:05:51,681 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:05:51" (1/1) ... [2024-06-27 18:05:51,685 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:05:51" (1/1) ... [2024-06-27 18:05:51,687 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:05:51" (1/1) ... [2024-06-27 18:05:51,688 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:05:51" (1/1) ... [2024-06-27 18:05:51,689 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:05:51" (1/1) ... [2024-06-27 18:05:51,690 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 18:05:51,691 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 18:05:51,691 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 18:05:51,691 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 18:05:51,692 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:05:51" (1/1) ... [2024-06-27 18:05:51,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 18:05:51,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:05:51,724 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-27 18:05:51,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-27 18:05:51,750 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2024-06-27 18:05:51,751 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2024-06-27 18:05:51,751 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2024-06-27 18:05:51,751 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2024-06-27 18:05:51,751 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 18:05:51,751 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 18:05:51,751 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 18:05:51,752 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 18:05:51,752 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 18:05:51,752 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 18:05:51,753 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 18:05:51,853 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 18:05:51,855 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 18:05:51,997 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 18:05:51,998 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 18:05:52,083 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 18:05:52,084 INFO L320 CfgBuilder]: Removed 3 assume(true) statements. [2024-06-27 18:05:52,084 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 06:05:52 BoogieIcfgContainer [2024-06-27 18:05:52,084 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 18:05:52,086 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 18:05:52,086 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 18:05:52,089 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 18:05:52,089 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 06:05:50" (1/4) ... [2024-06-27 18:05:52,089 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51d6b77d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 06:05:52, skipping insertion in model container [2024-06-27 18:05:52,089 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 06:05:51" (2/4) ... [2024-06-27 18:05:52,089 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51d6b77d and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 06:05:52, skipping insertion in model container [2024-06-27 18:05:52,090 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:05:51" (3/4) ... [2024-06-27 18:05:52,090 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51d6b77d and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 06:05:52, skipping insertion in model container [2024-06-27 18:05:52,090 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 06:05:52" (4/4) ... [2024-06-27 18:05:52,091 INFO L112 eAbstractionObserver]: Analyzing ICFG fib_unsafe-10.i [2024-06-27 18:05:52,105 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 18:05:52,105 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-27 18:05:52,106 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 18:05:52,146 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 18:05:52,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 37 places, 34 transitions, 76 flow [2024-06-27 18:05:52,199 INFO L124 PetriNetUnfolderBase]: 4/32 cut-off events. [2024-06-27 18:05:52,200 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 18:05:52,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39 conditions, 32 events. 4/32 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 33 event pairs, 0 based on Foata normal form. 0/25 useless extension candidates. Maximal degree in co-relation 28. Up to 2 conditions per place. [2024-06-27 18:05:52,202 INFO L82 GeneralOperation]: Start removeDead. Operand has 37 places, 34 transitions, 76 flow [2024-06-27 18:05:52,208 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 35 places, 32 transitions, 70 flow [2024-06-27 18:05:52,217 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 18:05:52,226 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;@5f120735, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 18:05:52,227 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-06-27 18:05:52,234 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 18:05:52,235 INFO L124 PetriNetUnfolderBase]: 0/10 cut-off events. [2024-06-27 18:05:52,235 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 18:05:52,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:05:52,236 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:05:52,236 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:05:52,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:05:52,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1002670089, now seen corresponding path program 1 times [2024-06-27 18:05:52,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:05:52,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219254788] [2024-06-27 18:05:52,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:05:52,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:05:52,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:05:52,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:52,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:05:52,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219254788] [2024-06-27 18:05:52,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219254788] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:05:52,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:05:52,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 18:05:52,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472677187] [2024-06-27 18:05:52,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:05:52,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 18:05:52,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:05:52,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 18:05:52,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 18:05:52,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-27 18:05:52,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 32 transitions, 70 flow. Second operand has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:52,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:05:52,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-27 18:05:52,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:05:53,019 INFO L124 PetriNetUnfolderBase]: 354/619 cut-off events. [2024-06-27 18:05:53,020 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-06-27 18:05:53,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1182 conditions, 619 events. 354/619 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2648 event pairs, 51 based on Foata normal form. 33/585 useless extension candidates. Maximal degree in co-relation 1165. Up to 343 conditions per place. [2024-06-27 18:05:53,031 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 41 selfloop transitions, 11 changer transitions 1/60 dead transitions. [2024-06-27 18:05:53,031 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 60 transitions, 235 flow [2024-06-27 18:05:53,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 18:05:53,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 18:05:53,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 106 transitions. [2024-06-27 18:05:53,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6235294117647059 [2024-06-27 18:05:53,045 INFO L175 Difference]: Start difference. First operand has 35 places, 32 transitions, 70 flow. Second operand 5 states and 106 transitions. [2024-06-27 18:05:53,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 60 transitions, 235 flow [2024-06-27 18:05:53,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 60 transitions, 232 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-27 18:05:53,051 INFO L231 Difference]: Finished difference. Result has 40 places, 38 transitions, 142 flow [2024-06-27 18:05:53,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=142, PETRI_PLACES=40, PETRI_TRANSITIONS=38} [2024-06-27 18:05:53,061 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 5 predicate places. [2024-06-27 18:05:53,061 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 38 transitions, 142 flow [2024-06-27 18:05:53,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:53,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:05:53,062 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:05:53,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 18:05:53,062 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:05:53,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:05:53,063 INFO L85 PathProgramCache]: Analyzing trace with hash -936565413, now seen corresponding path program 1 times [2024-06-27 18:05:53,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:05:53,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816000958] [2024-06-27 18:05:53,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:05:53,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:05:53,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:05:53,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:53,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:05:53,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816000958] [2024-06-27 18:05:53,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816000958] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:05:53,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:05:53,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:05:53,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024389329] [2024-06-27 18:05:53,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:05:53,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:05:53,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:05:53,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:05:53,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:05:53,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-27 18:05:53,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 38 transitions, 142 flow. Second operand has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:53,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:05:53,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-27 18:05:53,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:05:53,492 INFO L124 PetriNetUnfolderBase]: 322/569 cut-off events. [2024-06-27 18:05:53,492 INFO L125 PetriNetUnfolderBase]: For 236/236 co-relation queries the response was YES. [2024-06-27 18:05:53,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1489 conditions, 569 events. 322/569 cut-off events. For 236/236 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2457 event pairs, 30 based on Foata normal form. 12/565 useless extension candidates. Maximal degree in co-relation 1465. Up to 295 conditions per place. [2024-06-27 18:05:53,496 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 51 selfloop transitions, 17 changer transitions 0/75 dead transitions. [2024-06-27 18:05:53,496 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 75 transitions, 380 flow [2024-06-27 18:05:53,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:05:53,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:05:53,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-27 18:05:53,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5630252100840336 [2024-06-27 18:05:53,498 INFO L175 Difference]: Start difference. First operand has 40 places, 38 transitions, 142 flow. Second operand 7 states and 134 transitions. [2024-06-27 18:05:53,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 75 transitions, 380 flow [2024-06-27 18:05:53,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 75 transitions, 380 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-06-27 18:05:53,505 INFO L231 Difference]: Finished difference. Result has 48 places, 44 transitions, 224 flow [2024-06-27 18:05:53,505 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=224, PETRI_PLACES=48, PETRI_TRANSITIONS=44} [2024-06-27 18:05:53,506 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 13 predicate places. [2024-06-27 18:05:53,506 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 44 transitions, 224 flow [2024-06-27 18:05:53,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:53,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:05:53,506 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:05:53,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 18:05:53,507 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:05:53,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:05:53,507 INFO L85 PathProgramCache]: Analyzing trace with hash 544161191, now seen corresponding path program 1 times [2024-06-27 18:05:53,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:05:53,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135725060] [2024-06-27 18:05:53,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:05:53,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:05:53,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:05:53,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:53,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:05:53,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135725060] [2024-06-27 18:05:53,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135725060] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:05:53,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:05:53,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:05:53,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98974340] [2024-06-27 18:05:53,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:05:53,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:05:53,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:05:53,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:05:53,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:05:53,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-27 18:05:53,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 44 transitions, 224 flow. Second operand has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:53,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:05:53,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-27 18:05:53,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:05:53,983 INFO L124 PetriNetUnfolderBase]: 307/544 cut-off events. [2024-06-27 18:05:53,983 INFO L125 PetriNetUnfolderBase]: For 512/515 co-relation queries the response was YES. [2024-06-27 18:05:53,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1701 conditions, 544 events. 307/544 cut-off events. For 512/515 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2306 event pairs, 20 based on Foata normal form. 11/539 useless extension candidates. Maximal degree in co-relation 1670. Up to 295 conditions per place. [2024-06-27 18:05:53,986 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 54 selfloop transitions, 19 changer transitions 0/80 dead transitions. [2024-06-27 18:05:53,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 80 transitions, 481 flow [2024-06-27 18:05:53,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:05:53,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:05:53,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-27 18:05:53,991 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5404411764705882 [2024-06-27 18:05:53,991 INFO L175 Difference]: Start difference. First operand has 48 places, 44 transitions, 224 flow. Second operand 8 states and 147 transitions. [2024-06-27 18:05:53,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 80 transitions, 481 flow [2024-06-27 18:05:53,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 80 transitions, 449 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-27 18:05:53,998 INFO L231 Difference]: Finished difference. Result has 51 places, 45 transitions, 244 flow [2024-06-27 18:05:53,998 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=244, PETRI_PLACES=51, PETRI_TRANSITIONS=45} [2024-06-27 18:05:53,999 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 16 predicate places. [2024-06-27 18:05:53,999 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 45 transitions, 244 flow [2024-06-27 18:05:53,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:53,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:05:54,000 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:05:54,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 18:05:54,000 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:05:54,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:05:54,001 INFO L85 PathProgramCache]: Analyzing trace with hash 587817960, now seen corresponding path program 1 times [2024-06-27 18:05:54,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:05:54,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020228001] [2024-06-27 18:05:54,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:05:54,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:05:54,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:05:54,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:54,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:05:54,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020228001] [2024-06-27 18:05:54,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020228001] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:05:54,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:05:54,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:05:54,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638519276] [2024-06-27 18:05:54,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:05:54,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:05:54,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:05:54,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:05:54,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:05:54,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-27 18:05:54,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 45 transitions, 244 flow. Second operand has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:54,191 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:05:54,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-27 18:05:54,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:05:54,328 INFO L124 PetriNetUnfolderBase]: 373/652 cut-off events. [2024-06-27 18:05:54,328 INFO L125 PetriNetUnfolderBase]: For 835/835 co-relation queries the response was YES. [2024-06-27 18:05:54,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2129 conditions, 652 events. 373/652 cut-off events. For 835/835 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 2868 event pairs, 62 based on Foata normal form. 21/658 useless extension candidates. Maximal degree in co-relation 2097. Up to 245 conditions per place. [2024-06-27 18:05:54,333 INFO L140 encePairwiseOnDemand]: 24/34 looper letters, 51 selfloop transitions, 21 changer transitions 0/79 dead transitions. [2024-06-27 18:05:54,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 79 transitions, 538 flow [2024-06-27 18:05:54,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:05:54,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:05:54,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-27 18:05:54,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5378151260504201 [2024-06-27 18:05:54,334 INFO L175 Difference]: Start difference. First operand has 51 places, 45 transitions, 244 flow. Second operand 7 states and 128 transitions. [2024-06-27 18:05:54,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 79 transitions, 538 flow [2024-06-27 18:05:54,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 79 transitions, 494 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 18:05:54,337 INFO L231 Difference]: Finished difference. Result has 55 places, 52 transitions, 323 flow [2024-06-27 18:05:54,337 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=323, PETRI_PLACES=55, PETRI_TRANSITIONS=52} [2024-06-27 18:05:54,338 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 20 predicate places. [2024-06-27 18:05:54,338 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 52 transitions, 323 flow [2024-06-27 18:05:54,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:54,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:05:54,339 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:05:54,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 18:05:54,339 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:05:54,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:05:54,340 INFO L85 PathProgramCache]: Analyzing trace with hash 460670153, now seen corresponding path program 1 times [2024-06-27 18:05:54,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:05:54,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814802652] [2024-06-27 18:05:54,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:05:54,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:05:54,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:05:54,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:54,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:05:54,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814802652] [2024-06-27 18:05:54,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814802652] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:05:54,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:05:54,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:05:54,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568470341] [2024-06-27 18:05:54,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:05:54,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:05:54,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:05:54,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:05:54,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:05:54,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-27 18:05:54,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 52 transitions, 323 flow. Second operand has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:54,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:05:54,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-27 18:05:54,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:05:54,670 INFO L124 PetriNetUnfolderBase]: 355/621 cut-off events. [2024-06-27 18:05:54,670 INFO L125 PetriNetUnfolderBase]: For 1110/1110 co-relation queries the response was YES. [2024-06-27 18:05:54,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2208 conditions, 621 events. 355/621 cut-off events. For 1110/1110 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2683 event pairs, 58 based on Foata normal form. 9/615 useless extension candidates. Maximal degree in co-relation 2170. Up to 242 conditions per place. [2024-06-27 18:05:54,676 INFO L140 encePairwiseOnDemand]: 25/34 looper letters, 50 selfloop transitions, 21 changer transitions 0/78 dead transitions. [2024-06-27 18:05:54,676 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 78 transitions, 567 flow [2024-06-27 18:05:54,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:05:54,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:05:54,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-27 18:05:54,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49264705882352944 [2024-06-27 18:05:54,677 INFO L175 Difference]: Start difference. First operand has 55 places, 52 transitions, 323 flow. Second operand 8 states and 134 transitions. [2024-06-27 18:05:54,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 78 transitions, 567 flow [2024-06-27 18:05:54,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 78 transitions, 560 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 18:05:54,682 INFO L231 Difference]: Finished difference. Result has 62 places, 52 transitions, 363 flow [2024-06-27 18:05:54,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=363, PETRI_PLACES=62, PETRI_TRANSITIONS=52} [2024-06-27 18:05:54,685 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 27 predicate places. [2024-06-27 18:05:54,686 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 52 transitions, 363 flow [2024-06-27 18:05:54,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:54,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:05:54,690 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:05:54,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 18:05:54,690 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:05:54,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:05:54,691 INFO L85 PathProgramCache]: Analyzing trace with hash 1780842470, now seen corresponding path program 1 times [2024-06-27 18:05:54,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:05:54,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403531806] [2024-06-27 18:05:54,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:05:54,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:05:54,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:05:54,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:54,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:05:54,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403531806] [2024-06-27 18:05:54,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403531806] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:05:54,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:05:54,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:05:54,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699635906] [2024-06-27 18:05:54,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:05:54,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:05:54,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:05:54,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:05:54,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:05:54,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-27 18:05:54,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 52 transitions, 363 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:54,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:05:54,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-27 18:05:54,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:05:55,098 INFO L124 PetriNetUnfolderBase]: 367/640 cut-off events. [2024-06-27 18:05:55,099 INFO L125 PetriNetUnfolderBase]: For 1371/1376 co-relation queries the response was YES. [2024-06-27 18:05:55,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2383 conditions, 640 events. 367/640 cut-off events. For 1371/1376 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2765 event pairs, 60 based on Foata normal form. 5/630 useless extension candidates. Maximal degree in co-relation 2341. Up to 232 conditions per place. [2024-06-27 18:05:55,103 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 57 selfloop transitions, 29 changer transitions 0/93 dead transitions. [2024-06-27 18:05:55,104 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 93 transitions, 699 flow [2024-06-27 18:05:55,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:05:55,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:05:55,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-27 18:05:55,105 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5163398692810458 [2024-06-27 18:05:55,105 INFO L175 Difference]: Start difference. First operand has 62 places, 52 transitions, 363 flow. Second operand 9 states and 158 transitions. [2024-06-27 18:05:55,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 93 transitions, 699 flow [2024-06-27 18:05:55,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 93 transitions, 647 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-27 18:05:55,111 INFO L231 Difference]: Finished difference. Result has 65 places, 59 transitions, 434 flow [2024-06-27 18:05:55,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=317, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=434, PETRI_PLACES=65, PETRI_TRANSITIONS=59} [2024-06-27 18:05:55,113 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 30 predicate places. [2024-06-27 18:05:55,113 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 59 transitions, 434 flow [2024-06-27 18:05:55,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:55,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:05:55,114 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:05:55,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 18:05:55,114 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:05:55,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:05:55,115 INFO L85 PathProgramCache]: Analyzing trace with hash 148751756, now seen corresponding path program 2 times [2024-06-27 18:05:55,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:05:55,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489938483] [2024-06-27 18:05:55,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:05:55,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:05:55,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:05:55,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:55,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:05:55,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489938483] [2024-06-27 18:05:55,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489938483] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:05:55,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:05:55,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:05:55,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777650906] [2024-06-27 18:05:55,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:05:55,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:05:55,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:05:55,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:05:55,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:05:55,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-27 18:05:55,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 59 transitions, 434 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:55,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:05:55,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-27 18:05:55,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:05:55,488 INFO L124 PetriNetUnfolderBase]: 385/670 cut-off events. [2024-06-27 18:05:55,489 INFO L125 PetriNetUnfolderBase]: For 1626/1626 co-relation queries the response was YES. [2024-06-27 18:05:55,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2643 conditions, 670 events. 385/670 cut-off events. For 1626/1626 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 2933 event pairs, 61 based on Foata normal form. 4/659 useless extension candidates. Maximal degree in co-relation 2600. Up to 267 conditions per place. [2024-06-27 18:05:55,493 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 57 selfloop transitions, 32 changer transitions 0/96 dead transitions. [2024-06-27 18:05:55,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 96 transitions, 807 flow [2024-06-27 18:05:55,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:05:55,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:05:55,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-27 18:05:55,495 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49673202614379086 [2024-06-27 18:05:55,495 INFO L175 Difference]: Start difference. First operand has 65 places, 59 transitions, 434 flow. Second operand 9 states and 152 transitions. [2024-06-27 18:05:55,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 96 transitions, 807 flow [2024-06-27 18:05:55,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 96 transitions, 736 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-27 18:05:55,501 INFO L231 Difference]: Finished difference. Result has 70 places, 69 transitions, 549 flow [2024-06-27 18:05:55,501 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=378, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=549, PETRI_PLACES=70, PETRI_TRANSITIONS=69} [2024-06-27 18:05:55,503 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 35 predicate places. [2024-06-27 18:05:55,503 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 69 transitions, 549 flow [2024-06-27 18:05:55,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:55,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:05:55,503 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:05:55,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 18:05:55,504 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:05:55,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:05:55,504 INFO L85 PathProgramCache]: Analyzing trace with hash -622892136, now seen corresponding path program 3 times [2024-06-27 18:05:55,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:05:55,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045991292] [2024-06-27 18:05:55,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:05:55,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:05:55,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:05:55,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:55,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:05:55,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045991292] [2024-06-27 18:05:55,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045991292] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:05:55,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:05:55,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:05:55,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836388692] [2024-06-27 18:05:55,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:05:55,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:05:55,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:05:55,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:05:55,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:05:55,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-27 18:05:55,744 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 69 transitions, 549 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:55,744 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:05:55,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-27 18:05:55,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:05:55,887 INFO L124 PetriNetUnfolderBase]: 397/688 cut-off events. [2024-06-27 18:05:55,888 INFO L125 PetriNetUnfolderBase]: For 1934/1944 co-relation queries the response was YES. [2024-06-27 18:05:55,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2883 conditions, 688 events. 397/688 cut-off events. For 1934/1944 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 3020 event pairs, 60 based on Foata normal form. 9/682 useless extension candidates. Maximal degree in co-relation 2837. Up to 278 conditions per place. [2024-06-27 18:05:55,892 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 63 selfloop transitions, 36 changer transitions 0/106 dead transitions. [2024-06-27 18:05:55,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 106 transitions, 922 flow [2024-06-27 18:05:55,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:05:55,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:05:55,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-27 18:05:55,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5032679738562091 [2024-06-27 18:05:55,893 INFO L175 Difference]: Start difference. First operand has 70 places, 69 transitions, 549 flow. Second operand 9 states and 154 transitions. [2024-06-27 18:05:55,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 106 transitions, 922 flow [2024-06-27 18:05:55,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 106 transitions, 882 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-27 18:05:55,899 INFO L231 Difference]: Finished difference. Result has 78 places, 76 transitions, 670 flow [2024-06-27 18:05:55,900 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=513, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=670, PETRI_PLACES=78, PETRI_TRANSITIONS=76} [2024-06-27 18:05:55,900 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 43 predicate places. [2024-06-27 18:05:55,900 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 76 transitions, 670 flow [2024-06-27 18:05:55,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:55,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:05:55,900 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:05:55,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 18:05:55,901 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:05:55,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:05:55,901 INFO L85 PathProgramCache]: Analyzing trace with hash 149346402, now seen corresponding path program 4 times [2024-06-27 18:05:55,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:05:55,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962958820] [2024-06-27 18:05:55,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:05:55,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:05:55,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:05:56,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:56,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:05:56,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962958820] [2024-06-27 18:05:56,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962958820] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:05:56,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:05:56,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:05:56,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699343904] [2024-06-27 18:05:56,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:05:56,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:05:56,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:05:56,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:05:56,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:05:56,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-27 18:05:56,125 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 76 transitions, 670 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:56,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:05:56,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-27 18:05:56,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:05:56,299 INFO L124 PetriNetUnfolderBase]: 409/709 cut-off events. [2024-06-27 18:05:56,299 INFO L125 PetriNetUnfolderBase]: For 2414/2414 co-relation queries the response was YES. [2024-06-27 18:05:56,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3149 conditions, 709 events. 409/709 cut-off events. For 2414/2414 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 3140 event pairs, 57 based on Foata normal form. 4/698 useless extension candidates. Maximal degree in co-relation 3098. Up to 294 conditions per place. [2024-06-27 18:05:56,304 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 67 selfloop transitions, 38 changer transitions 0/112 dead transitions. [2024-06-27 18:05:56,304 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 112 transitions, 1062 flow [2024-06-27 18:05:56,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:05:56,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:05:56,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-27 18:05:56,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5065359477124183 [2024-06-27 18:05:56,305 INFO L175 Difference]: Start difference. First operand has 78 places, 76 transitions, 670 flow. Second operand 9 states and 155 transitions. [2024-06-27 18:05:56,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 112 transitions, 1062 flow [2024-06-27 18:05:56,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 112 transitions, 1003 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-27 18:05:56,313 INFO L231 Difference]: Finished difference. Result has 84 places, 82 transitions, 771 flow [2024-06-27 18:05:56,314 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=615, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=771, PETRI_PLACES=84, PETRI_TRANSITIONS=82} [2024-06-27 18:05:56,314 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 49 predicate places. [2024-06-27 18:05:56,314 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 82 transitions, 771 flow [2024-06-27 18:05:56,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:56,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:05:56,315 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:05:56,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 18:05:56,315 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:05:56,315 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:05:56,315 INFO L85 PathProgramCache]: Analyzing trace with hash 314779076, now seen corresponding path program 5 times [2024-06-27 18:05:56,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:05:56,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350936038] [2024-06-27 18:05:56,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:05:56,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:05:56,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:05:56,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:56,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:05:56,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350936038] [2024-06-27 18:05:56,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350936038] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:05:56,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:05:56,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:05:56,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154122251] [2024-06-27 18:05:56,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:05:56,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:05:56,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:05:56,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:05:56,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:05:56,526 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-27 18:05:56,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 82 transitions, 771 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:56,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:05:56,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-27 18:05:56,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:05:56,687 INFO L124 PetriNetUnfolderBase]: 415/714 cut-off events. [2024-06-27 18:05:56,688 INFO L125 PetriNetUnfolderBase]: For 2955/2955 co-relation queries the response was YES. [2024-06-27 18:05:56,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3364 conditions, 714 events. 415/714 cut-off events. For 2955/2955 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 3165 event pairs, 60 based on Foata normal form. 1/700 useless extension candidates. Maximal degree in co-relation 3310. Up to 297 conditions per place. [2024-06-27 18:05:56,693 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 66 selfloop transitions, 41 changer transitions 0/114 dead transitions. [2024-06-27 18:05:56,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 114 transitions, 1159 flow [2024-06-27 18:05:56,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:05:56,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:05:56,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-27 18:05:56,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4934640522875817 [2024-06-27 18:05:56,695 INFO L175 Difference]: Start difference. First operand has 84 places, 82 transitions, 771 flow. Second operand 9 states and 151 transitions. [2024-06-27 18:05:56,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 114 transitions, 1159 flow [2024-06-27 18:05:56,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 114 transitions, 1103 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-27 18:05:56,704 INFO L231 Difference]: Finished difference. Result has 90 places, 87 transitions, 873 flow [2024-06-27 18:05:56,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=717, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=873, PETRI_PLACES=90, PETRI_TRANSITIONS=87} [2024-06-27 18:05:56,704 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 55 predicate places. [2024-06-27 18:05:56,705 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 87 transitions, 873 flow [2024-06-27 18:05:56,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:56,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:05:56,705 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:05:56,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 18:05:56,705 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:05:56,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:05:56,706 INFO L85 PathProgramCache]: Analyzing trace with hash 322135376, now seen corresponding path program 6 times [2024-06-27 18:05:56,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:05:56,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458291554] [2024-06-27 18:05:56,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:05:56,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:05:56,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:05:56,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:56,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:05:56,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458291554] [2024-06-27 18:05:56,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458291554] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:05:56,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:05:56,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:05:56,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850358037] [2024-06-27 18:05:56,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:05:56,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:05:56,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:05:56,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:05:56,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:05:56,931 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-27 18:05:56,932 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 87 transitions, 873 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:56,932 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:05:56,932 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-27 18:05:56,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:05:57,063 INFO L124 PetriNetUnfolderBase]: 415/714 cut-off events. [2024-06-27 18:05:57,063 INFO L125 PetriNetUnfolderBase]: For 3553/3559 co-relation queries the response was YES. [2024-06-27 18:05:57,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3485 conditions, 714 events. 415/714 cut-off events. For 3553/3559 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 3160 event pairs, 64 based on Foata normal form. 4/703 useless extension candidates. Maximal degree in co-relation 3427. Up to 310 conditions per place. [2024-06-27 18:05:57,069 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 68 selfloop transitions, 45 changer transitions 0/120 dead transitions. [2024-06-27 18:05:57,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 120 transitions, 1285 flow [2024-06-27 18:05:57,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:05:57,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:05:57,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-27 18:05:57,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-27 18:05:57,070 INFO L175 Difference]: Start difference. First operand has 90 places, 87 transitions, 873 flow. Second operand 9 states and 153 transitions. [2024-06-27 18:05:57,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 120 transitions, 1285 flow [2024-06-27 18:05:57,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 120 transitions, 1207 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-27 18:05:57,079 INFO L231 Difference]: Finished difference. Result has 96 places, 93 transitions, 985 flow [2024-06-27 18:05:57,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=798, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=985, PETRI_PLACES=96, PETRI_TRANSITIONS=93} [2024-06-27 18:05:57,080 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 61 predicate places. [2024-06-27 18:05:57,080 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 93 transitions, 985 flow [2024-06-27 18:05:57,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:57,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:05:57,080 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:05:57,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 18:05:57,081 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:05:57,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:05:57,081 INFO L85 PathProgramCache]: Analyzing trace with hash 485330931, now seen corresponding path program 1 times [2024-06-27 18:05:57,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:05:57,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199033463] [2024-06-27 18:05:57,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:05:57,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:05:57,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:05:57,113 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:57,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:05:57,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199033463] [2024-06-27 18:05:57,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199033463] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:05:57,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895144303] [2024-06-27 18:05:57,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:05:57,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:05:57,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:05:57,116 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 18:05:57,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-06-27 18:05:57,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:05:57,186 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 3 conjunts are in the unsatisfiable core [2024-06-27 18:05:57,189 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:05:57,225 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:57,225 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:05:57,239 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:57,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895144303] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:05:57,240 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:05:57,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-06-27 18:05:57,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251558483] [2024-06-27 18:05:57,240 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:05:57,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:05:57,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:05:57,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:05:57,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:05:57,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 34 [2024-06-27 18:05:57,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 93 transitions, 985 flow. Second operand has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:57,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:05:57,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 34 [2024-06-27 18:05:57,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:05:57,339 INFO L124 PetriNetUnfolderBase]: 396/727 cut-off events. [2024-06-27 18:05:57,339 INFO L125 PetriNetUnfolderBase]: For 4964/5041 co-relation queries the response was YES. [2024-06-27 18:05:57,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3595 conditions, 727 events. 396/727 cut-off events. For 4964/5041 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3283 event pairs, 80 based on Foata normal form. 61/736 useless extension candidates. Maximal degree in co-relation 3535. Up to 258 conditions per place. [2024-06-27 18:05:57,345 INFO L140 encePairwiseOnDemand]: 31/34 looper letters, 67 selfloop transitions, 27 changer transitions 0/120 dead transitions. [2024-06-27 18:05:57,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 120 transitions, 1383 flow [2024-06-27 18:05:57,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:05:57,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:05:57,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 138 transitions. [2024-06-27 18:05:57,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6764705882352942 [2024-06-27 18:05:57,346 INFO L175 Difference]: Start difference. First operand has 96 places, 93 transitions, 985 flow. Second operand 6 states and 138 transitions. [2024-06-27 18:05:57,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 120 transitions, 1383 flow [2024-06-27 18:05:57,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 120 transitions, 1293 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-27 18:05:57,356 INFO L231 Difference]: Finished difference. Result has 99 places, 96 transitions, 1003 flow [2024-06-27 18:05:57,356 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=895, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1003, PETRI_PLACES=99, PETRI_TRANSITIONS=96} [2024-06-27 18:05:57,357 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 64 predicate places. [2024-06-27 18:05:57,357 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 96 transitions, 1003 flow [2024-06-27 18:05:57,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:57,357 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:05:57,357 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:05:57,372 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-06-27 18:05:57,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-06-27 18:05:57,570 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:05:57,570 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:05:57,571 INFO L85 PathProgramCache]: Analyzing trace with hash 392354368, now seen corresponding path program 1 times [2024-06-27 18:05:57,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:05:57,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626834502] [2024-06-27 18:05:57,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:05:57,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:05:57,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:05:57,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:57,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:05:57,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626834502] [2024-06-27 18:05:57,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626834502] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:05:57,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:05:57,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:05:57,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192651605] [2024-06-27 18:05:57,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:05:57,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:05:57,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:05:57,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:05:57,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:05:57,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-27 18:05:57,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 96 transitions, 1003 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:57,904 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:05:57,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-27 18:05:57,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:05:58,136 INFO L124 PetriNetUnfolderBase]: 547/951 cut-off events. [2024-06-27 18:05:58,137 INFO L125 PetriNetUnfolderBase]: For 6044/6049 co-relation queries the response was YES. [2024-06-27 18:05:58,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4804 conditions, 951 events. 547/951 cut-off events. For 6044/6049 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 4367 event pairs, 60 based on Foata normal form. 7/941 useless extension candidates. Maximal degree in co-relation 4740. Up to 341 conditions per place. [2024-06-27 18:05:58,144 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 86 selfloop transitions, 51 changer transitions 0/144 dead transitions. [2024-06-27 18:05:58,145 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 144 transitions, 1582 flow [2024-06-27 18:05:58,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:05:58,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:05:58,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 178 transitions. [2024-06-27 18:05:58,146 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5235294117647059 [2024-06-27 18:05:58,146 INFO L175 Difference]: Start difference. First operand has 99 places, 96 transitions, 1003 flow. Second operand 10 states and 178 transitions. [2024-06-27 18:05:58,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 144 transitions, 1582 flow [2024-06-27 18:05:58,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 144 transitions, 1516 flow, removed 7 selfloop flow, removed 2 redundant places. [2024-06-27 18:05:58,165 INFO L231 Difference]: Finished difference. Result has 108 places, 101 transitions, 1120 flow [2024-06-27 18:05:58,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=941, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1120, PETRI_PLACES=108, PETRI_TRANSITIONS=101} [2024-06-27 18:05:58,166 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 73 predicate places. [2024-06-27 18:05:58,166 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 101 transitions, 1120 flow [2024-06-27 18:05:58,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:58,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:05:58,167 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:05:58,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 18:05:58,167 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:05:58,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:05:58,168 INFO L85 PathProgramCache]: Analyzing trace with hash 991216414, now seen corresponding path program 2 times [2024-06-27 18:05:58,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:05:58,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423472442] [2024-06-27 18:05:58,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:05:58,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:05:58,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:05:58,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:58,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:05:58,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423472442] [2024-06-27 18:05:58,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423472442] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:05:58,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:05:58,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:05:58,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617156177] [2024-06-27 18:05:58,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:05:58,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:05:58,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:05:58,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:05:58,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:05:58,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-27 18:05:58,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 101 transitions, 1120 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:58,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:05:58,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-27 18:05:58,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:05:58,784 INFO L124 PetriNetUnfolderBase]: 583/1011 cut-off events. [2024-06-27 18:05:58,784 INFO L125 PetriNetUnfolderBase]: For 7361/7361 co-relation queries the response was YES. [2024-06-27 18:05:58,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5257 conditions, 1011 events. 583/1011 cut-off events. For 7361/7361 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 4743 event pairs, 86 based on Foata normal form. 3/997 useless extension candidates. Maximal degree in co-relation 5189. Up to 347 conditions per place. [2024-06-27 18:05:58,795 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 86 selfloop transitions, 52 changer transitions 0/145 dead transitions. [2024-06-27 18:05:58,796 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 145 transitions, 1667 flow [2024-06-27 18:05:58,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:05:58,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:05:58,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 176 transitions. [2024-06-27 18:05:58,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5176470588235295 [2024-06-27 18:05:58,797 INFO L175 Difference]: Start difference. First operand has 108 places, 101 transitions, 1120 flow. Second operand 10 states and 176 transitions. [2024-06-27 18:05:58,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 145 transitions, 1667 flow [2024-06-27 18:05:58,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 145 transitions, 1581 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-27 18:05:58,818 INFO L231 Difference]: Finished difference. Result has 113 places, 105 transitions, 1215 flow [2024-06-27 18:05:58,819 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1038, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1215, PETRI_PLACES=113, PETRI_TRANSITIONS=105} [2024-06-27 18:05:58,819 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 78 predicate places. [2024-06-27 18:05:58,819 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 105 transitions, 1215 flow [2024-06-27 18:05:58,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:58,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:05:58,820 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:05:58,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 18:05:58,820 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:05:58,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:05:58,821 INFO L85 PathProgramCache]: Analyzing trace with hash 991220134, now seen corresponding path program 3 times [2024-06-27 18:05:58,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:05:58,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497426688] [2024-06-27 18:05:58,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:05:58,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:05:58,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:05:59,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:59,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:05:59,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497426688] [2024-06-27 18:05:59,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497426688] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:05:59,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:05:59,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:05:59,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234594565] [2024-06-27 18:05:59,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:05:59,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:05:59,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:05:59,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:05:59,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:05:59,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-27 18:05:59,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 105 transitions, 1215 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:59,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:05:59,151 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-27 18:05:59,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:05:59,386 INFO L124 PetriNetUnfolderBase]: 601/1038 cut-off events. [2024-06-27 18:05:59,387 INFO L125 PetriNetUnfolderBase]: For 8196/8201 co-relation queries the response was YES. [2024-06-27 18:05:59,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5548 conditions, 1038 events. 601/1038 cut-off events. For 8196/8201 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 4851 event pairs, 98 based on Foata normal form. 7/1028 useless extension candidates. Maximal degree in co-relation 5477. Up to 386 conditions per place. [2024-06-27 18:05:59,397 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 83 selfloop transitions, 54 changer transitions 0/144 dead transitions. [2024-06-27 18:05:59,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 144 transitions, 1699 flow [2024-06-27 18:05:59,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:05:59,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:05:59,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 174 transitions. [2024-06-27 18:05:59,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5117647058823529 [2024-06-27 18:05:59,399 INFO L175 Difference]: Start difference. First operand has 113 places, 105 transitions, 1215 flow. Second operand 10 states and 174 transitions. [2024-06-27 18:05:59,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 144 transitions, 1699 flow [2024-06-27 18:05:59,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 144 transitions, 1622 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-27 18:05:59,420 INFO L231 Difference]: Finished difference. Result has 117 places, 107 transitions, 1291 flow [2024-06-27 18:05:59,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1139, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1291, PETRI_PLACES=117, PETRI_TRANSITIONS=107} [2024-06-27 18:05:59,421 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 82 predicate places. [2024-06-27 18:05:59,422 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 107 transitions, 1291 flow [2024-06-27 18:05:59,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:59,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:05:59,422 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:05:59,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 18:05:59,422 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:05:59,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:05:59,423 INFO L85 PathProgramCache]: Analyzing trace with hash 991220289, now seen corresponding path program 1 times [2024-06-27 18:05:59,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:05:59,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603655263] [2024-06-27 18:05:59,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:05:59,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:05:59,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:05:59,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:59,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:05:59,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603655263] [2024-06-27 18:05:59,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603655263] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:05:59,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:05:59,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:05:59,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18750588] [2024-06-27 18:05:59,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:05:59,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:05:59,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:05:59,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:05:59,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:05:59,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-27 18:05:59,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 107 transitions, 1291 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:59,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:05:59,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-27 18:05:59,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:05:59,921 INFO L124 PetriNetUnfolderBase]: 619/1071 cut-off events. [2024-06-27 18:05:59,922 INFO L125 PetriNetUnfolderBase]: For 9365/9370 co-relation queries the response was YES. [2024-06-27 18:05:59,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5787 conditions, 1071 events. 619/1071 cut-off events. For 9365/9370 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 5100 event pairs, 92 based on Foata normal form. 7/1061 useless extension candidates. Maximal degree in co-relation 5714. Up to 410 conditions per place. [2024-06-27 18:05:59,934 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 84 selfloop transitions, 55 changer transitions 0/146 dead transitions. [2024-06-27 18:05:59,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 146 transitions, 1758 flow [2024-06-27 18:05:59,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:05:59,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:05:59,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 174 transitions. [2024-06-27 18:05:59,936 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5117647058823529 [2024-06-27 18:05:59,936 INFO L175 Difference]: Start difference. First operand has 117 places, 107 transitions, 1291 flow. Second operand 10 states and 174 transitions. [2024-06-27 18:05:59,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 146 transitions, 1758 flow [2024-06-27 18:05:59,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 146 transitions, 1646 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-27 18:05:59,956 INFO L231 Difference]: Finished difference. Result has 119 places, 109 transitions, 1329 flow [2024-06-27 18:05:59,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1181, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1329, PETRI_PLACES=119, PETRI_TRANSITIONS=109} [2024-06-27 18:05:59,957 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 84 predicate places. [2024-06-27 18:05:59,957 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 109 transitions, 1329 flow [2024-06-27 18:05:59,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:59,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:05:59,958 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:05:59,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 18:05:59,958 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:05:59,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:05:59,959 INFO L85 PathProgramCache]: Analyzing trace with hash 328371713, now seen corresponding path program 2 times [2024-06-27 18:05:59,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:05:59,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809348499] [2024-06-27 18:05:59,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:05:59,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:05:59,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:06:00,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:06:00,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:06:00,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809348499] [2024-06-27 18:06:00,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809348499] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:06:00,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:06:00,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:06:00,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432434264] [2024-06-27 18:06:00,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:06:00,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:06:00,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:06:00,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:06:00,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:06:00,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-27 18:06:00,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 109 transitions, 1329 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:06:00,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:06:00,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-27 18:06:00,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:06:00,418 INFO L124 PetriNetUnfolderBase]: 637/1098 cut-off events. [2024-06-27 18:06:00,418 INFO L125 PetriNetUnfolderBase]: For 10073/10078 co-relation queries the response was YES. [2024-06-27 18:06:00,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6023 conditions, 1098 events. 637/1098 cut-off events. For 10073/10078 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 5220 event pairs, 98 based on Foata normal form. 7/1088 useless extension candidates. Maximal degree in co-relation 5949. Up to 455 conditions per place. [2024-06-27 18:06:00,425 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 87 selfloop transitions, 51 changer transitions 0/145 dead transitions. [2024-06-27 18:06:00,425 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 145 transitions, 1790 flow [2024-06-27 18:06:00,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:06:00,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:06:00,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-27 18:06:00,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-27 18:06:00,427 INFO L175 Difference]: Start difference. First operand has 119 places, 109 transitions, 1329 flow. Second operand 10 states and 170 transitions. [2024-06-27 18:06:00,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 145 transitions, 1790 flow [2024-06-27 18:06:00,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 145 transitions, 1697 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-27 18:06:00,447 INFO L231 Difference]: Finished difference. Result has 122 places, 111 transitions, 1380 flow [2024-06-27 18:06:00,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1237, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1380, PETRI_PLACES=122, PETRI_TRANSITIONS=111} [2024-06-27 18:06:00,448 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 87 predicate places. [2024-06-27 18:06:00,448 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 111 transitions, 1380 flow [2024-06-27 18:06:00,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:06:00,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:06:00,449 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:06:00,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 18:06:00,449 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:06:00,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:06:00,449 INFO L85 PathProgramCache]: Analyzing trace with hash 328367838, now seen corresponding path program 4 times [2024-06-27 18:06:00,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:06:00,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763248490] [2024-06-27 18:06:00,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:06:00,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:06:00,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:06:00,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:06:00,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:06:00,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763248490] [2024-06-27 18:06:00,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763248490] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:06:00,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:06:00,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:06:00,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064066588] [2024-06-27 18:06:00,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:06:00,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:06:00,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:06:00,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:06:00,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:06:00,691 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-27 18:06:00,691 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 111 transitions, 1380 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:06:00,691 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:06:00,691 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-27 18:06:00,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:06:00,921 INFO L124 PetriNetUnfolderBase]: 673/1158 cut-off events. [2024-06-27 18:06:00,921 INFO L125 PetriNetUnfolderBase]: For 12189/12194 co-relation queries the response was YES. [2024-06-27 18:06:00,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6503 conditions, 1158 events. 673/1158 cut-off events. For 12189/12194 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 5601 event pairs, 92 based on Foata normal form. 7/1148 useless extension candidates. Maximal degree in co-relation 6427. Up to 484 conditions per place. [2024-06-27 18:06:00,929 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 93 selfloop transitions, 52 changer transitions 0/152 dead transitions. [2024-06-27 18:06:00,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 152 transitions, 1955 flow [2024-06-27 18:06:00,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:06:00,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:06:00,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 172 transitions. [2024-06-27 18:06:00,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5058823529411764 [2024-06-27 18:06:00,930 INFO L175 Difference]: Start difference. First operand has 122 places, 111 transitions, 1380 flow. Second operand 10 states and 172 transitions. [2024-06-27 18:06:00,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 152 transitions, 1955 flow [2024-06-27 18:06:00,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 152 transitions, 1837 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-27 18:06:00,955 INFO L231 Difference]: Finished difference. Result has 125 places, 115 transitions, 1453 flow [2024-06-27 18:06:00,956 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1266, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1453, PETRI_PLACES=125, PETRI_TRANSITIONS=115} [2024-06-27 18:06:00,956 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 90 predicate places. [2024-06-27 18:06:00,956 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 115 transitions, 1453 flow [2024-06-27 18:06:00,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:06:00,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:06:00,957 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:06:00,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 18:06:00,957 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:06:00,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:06:00,958 INFO L85 PathProgramCache]: Analyzing trace with hash 187162218, now seen corresponding path program 5 times [2024-06-27 18:06:00,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:06:00,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42542047] [2024-06-27 18:06:00,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:06:00,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:06:00,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:06:01,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:06:01,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:06:01,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42542047] [2024-06-27 18:06:01,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42542047] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:06:01,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:06:01,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:06:01,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904091887] [2024-06-27 18:06:01,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:06:01,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:06:01,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:06:01,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:06:01,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:06:01,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-27 18:06:01,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 115 transitions, 1453 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:06:01,191 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:06:01,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-27 18:06:01,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:06:01,450 INFO L124 PetriNetUnfolderBase]: 691/1188 cut-off events. [2024-06-27 18:06:01,450 INFO L125 PetriNetUnfolderBase]: For 13282/13282 co-relation queries the response was YES. [2024-06-27 18:06:01,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6739 conditions, 1188 events. 691/1188 cut-off events. For 13282/13282 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 5794 event pairs, 98 based on Foata normal form. 3/1174 useless extension candidates. Maximal degree in co-relation 6661. Up to 527 conditions per place. [2024-06-27 18:06:01,459 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 90 selfloop transitions, 54 changer transitions 0/151 dead transitions. [2024-06-27 18:06:01,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 151 transitions, 1957 flow [2024-06-27 18:06:01,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:06:01,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:06:01,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-27 18:06:01,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-27 18:06:01,461 INFO L175 Difference]: Start difference. First operand has 125 places, 115 transitions, 1453 flow. Second operand 10 states and 170 transitions. [2024-06-27 18:06:01,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 151 transitions, 1957 flow [2024-06-27 18:06:01,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 151 transitions, 1879 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-27 18:06:01,493 INFO L231 Difference]: Finished difference. Result has 129 places, 117 transitions, 1534 flow [2024-06-27 18:06:01,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1376, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1534, PETRI_PLACES=129, PETRI_TRANSITIONS=117} [2024-06-27 18:06:01,493 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 94 predicate places. [2024-06-27 18:06:01,493 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 117 transitions, 1534 flow [2024-06-27 18:06:01,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:06:01,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:06:01,494 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:06:01,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 18:06:01,494 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:06:01,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:06:01,495 INFO L85 PathProgramCache]: Analyzing trace with hash 334771818, now seen corresponding path program 6 times [2024-06-27 18:06:01,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:06:01,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718561340] [2024-06-27 18:06:01,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:06:01,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:06:01,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:06:01,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:06:01,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:06:01,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718561340] [2024-06-27 18:06:01,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718561340] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:06:01,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:06:01,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:06:01,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559501042] [2024-06-27 18:06:01,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:06:01,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:06:01,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:06:01,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:06:01,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:06:01,737 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-27 18:06:01,738 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 117 transitions, 1534 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:06:01,738 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:06:01,738 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-27 18:06:01,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:06:01,965 INFO L124 PetriNetUnfolderBase]: 709/1215 cut-off events. [2024-06-27 18:06:01,966 INFO L125 PetriNetUnfolderBase]: For 14795/14795 co-relation queries the response was YES. [2024-06-27 18:06:01,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7023 conditions, 1215 events. 709/1215 cut-off events. For 14795/14795 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 5932 event pairs, 96 based on Foata normal form. 3/1201 useless extension candidates. Maximal degree in co-relation 6943. Up to 556 conditions per place. [2024-06-27 18:06:01,975 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 92 selfloop transitions, 54 changer transitions 0/153 dead transitions. [2024-06-27 18:06:01,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 153 transitions, 2045 flow [2024-06-27 18:06:01,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:06:01,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:06:01,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-27 18:06:01,977 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-27 18:06:01,977 INFO L175 Difference]: Start difference. First operand has 129 places, 117 transitions, 1534 flow. Second operand 10 states and 170 transitions. [2024-06-27 18:06:01,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 153 transitions, 2045 flow [2024-06-27 18:06:02,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 153 transitions, 1962 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-27 18:06:02,007 INFO L231 Difference]: Finished difference. Result has 132 places, 119 transitions, 1613 flow [2024-06-27 18:06:02,007 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1452, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1613, PETRI_PLACES=132, PETRI_TRANSITIONS=119} [2024-06-27 18:06:02,008 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 97 predicate places. [2024-06-27 18:06:02,008 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 119 transitions, 1613 flow [2024-06-27 18:06:02,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:06:02,008 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:06:02,008 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:06:02,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 18:06:02,009 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:06:02,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:06:02,009 INFO L85 PathProgramCache]: Analyzing trace with hash 335008193, now seen corresponding path program 3 times [2024-06-27 18:06:02,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:06:02,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921248164] [2024-06-27 18:06:02,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:06:02,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:06:02,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:06:02,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:06:02,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:06:02,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921248164] [2024-06-27 18:06:02,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921248164] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:06:02,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:06:02,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:06:02,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172309908] [2024-06-27 18:06:02,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:06:02,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:06:02,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:06:02,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:06:02,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:06:02,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-27 18:06:02,251 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 119 transitions, 1613 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:06:02,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:06:02,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-27 18:06:02,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:06:02,507 INFO L124 PetriNetUnfolderBase]: 745/1275 cut-off events. [2024-06-27 18:06:02,508 INFO L125 PetriNetUnfolderBase]: For 16389/16394 co-relation queries the response was YES. [2024-06-27 18:06:02,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7460 conditions, 1275 events. 745/1275 cut-off events. For 16389/16394 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 6327 event pairs, 98 based on Foata normal form. 16/1274 useless extension candidates. Maximal degree in co-relation 7378. Up to 588 conditions per place. [2024-06-27 18:06:02,518 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 98 selfloop transitions, 55 changer transitions 0/160 dead transitions. [2024-06-27 18:06:02,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 160 transitions, 2165 flow [2024-06-27 18:06:02,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:06:02,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:06:02,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 173 transitions. [2024-06-27 18:06:02,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5088235294117647 [2024-06-27 18:06:02,520 INFO L175 Difference]: Start difference. First operand has 132 places, 119 transitions, 1613 flow. Second operand 10 states and 173 transitions. [2024-06-27 18:06:02,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 160 transitions, 2165 flow [2024-06-27 18:06:02,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 160 transitions, 2043 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-27 18:06:02,556 INFO L231 Difference]: Finished difference. Result has 135 places, 123 transitions, 1689 flow [2024-06-27 18:06:02,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1497, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1689, PETRI_PLACES=135, PETRI_TRANSITIONS=123} [2024-06-27 18:06:02,557 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 100 predicate places. [2024-06-27 18:06:02,557 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 123 transitions, 1689 flow [2024-06-27 18:06:02,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:06:02,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:06:02,557 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:06:02,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 18:06:02,558 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:06:02,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:06:02,558 INFO L85 PathProgramCache]: Analyzing trace with hash 334771973, now seen corresponding path program 4 times [2024-06-27 18:06:02,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:06:02,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257012550] [2024-06-27 18:06:02,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:06:02,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:06:02,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:06:02,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:06:02,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:06:02,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257012550] [2024-06-27 18:06:02,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257012550] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:06:02,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:06:02,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:06:02,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596531639] [2024-06-27 18:06:02,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:06:02,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:06:02,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:06:02,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:06:02,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:06:02,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-27 18:06:02,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 123 transitions, 1689 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:06:02,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:06:02,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-27 18:06:02,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:06:03,097 INFO L124 PetriNetUnfolderBase]: 763/1305 cut-off events. [2024-06-27 18:06:03,097 INFO L125 PetriNetUnfolderBase]: For 18011/18016 co-relation queries the response was YES. [2024-06-27 18:06:03,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7794 conditions, 1305 events. 763/1305 cut-off events. For 18011/18016 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 6527 event pairs, 98 based on Foata normal form. 7/1295 useless extension candidates. Maximal degree in co-relation 7710. Up to 613 conditions per place. [2024-06-27 18:06:03,108 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 94 selfloop transitions, 58 changer transitions 0/159 dead transitions. [2024-06-27 18:06:03,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 159 transitions, 2193 flow [2024-06-27 18:06:03,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:06:03,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:06:03,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-27 18:06:03,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-27 18:06:03,109 INFO L175 Difference]: Start difference. First operand has 135 places, 123 transitions, 1689 flow. Second operand 10 states and 170 transitions. [2024-06-27 18:06:03,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 159 transitions, 2193 flow [2024-06-27 18:06:03,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 159 transitions, 2103 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-27 18:06:03,145 INFO L231 Difference]: Finished difference. Result has 139 places, 125 transitions, 1764 flow [2024-06-27 18:06:03,145 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1600, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1764, PETRI_PLACES=139, PETRI_TRANSITIONS=125} [2024-06-27 18:06:03,146 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 104 predicate places. [2024-06-27 18:06:03,146 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 125 transitions, 1764 flow [2024-06-27 18:06:03,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:06:03,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:06:03,146 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:06:03,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 18:06:03,147 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:06:03,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:06:03,147 INFO L85 PathProgramCache]: Analyzing trace with hash 316337792, now seen corresponding path program 7 times [2024-06-27 18:06:03,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:06:03,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235920460] [2024-06-27 18:06:03,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:06:03,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:06:03,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:06:03,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:06:03,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:06:03,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235920460] [2024-06-27 18:06:03,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235920460] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:06:03,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:06:03,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:06:03,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280905296] [2024-06-27 18:06:03,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:06:03,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:06:03,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:06:03,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:06:03,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:06:03,422 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-27 18:06:03,423 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 125 transitions, 1764 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:06:03,423 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:06:03,423 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-27 18:06:03,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:06:03,676 INFO L124 PetriNetUnfolderBase]: 781/1331 cut-off events. [2024-06-27 18:06:03,676 INFO L125 PetriNetUnfolderBase]: For 20951/20957 co-relation queries the response was YES. [2024-06-27 18:06:03,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8129 conditions, 1331 events. 781/1331 cut-off events. For 20951/20957 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 6675 event pairs, 101 based on Foata normal form. 9/1323 useless extension candidates. Maximal degree in co-relation 8043. Up to 637 conditions per place. [2024-06-27 18:06:03,686 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 92 selfloop transitions, 59 changer transitions 0/158 dead transitions. [2024-06-27 18:06:03,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 158 transitions, 2295 flow [2024-06-27 18:06:03,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:06:03,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:06:03,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 167 transitions. [2024-06-27 18:06:03,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49117647058823527 [2024-06-27 18:06:03,687 INFO L175 Difference]: Start difference. First operand has 139 places, 125 transitions, 1764 flow. Second operand 10 states and 167 transitions. [2024-06-27 18:06:03,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 158 transitions, 2295 flow [2024-06-27 18:06:03,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 158 transitions, 2198 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-27 18:06:03,723 INFO L231 Difference]: Finished difference. Result has 142 places, 127 transitions, 1843 flow [2024-06-27 18:06:03,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1668, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1843, PETRI_PLACES=142, PETRI_TRANSITIONS=127} [2024-06-27 18:06:03,724 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 107 predicate places. [2024-06-27 18:06:03,724 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 127 transitions, 1843 flow [2024-06-27 18:06:03,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:06:03,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:06:03,725 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:06:03,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 18:06:03,725 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:06:03,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:06:03,725 INFO L85 PathProgramCache]: Analyzing trace with hash 316337947, now seen corresponding path program 5 times [2024-06-27 18:06:03,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:06:03,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217025907] [2024-06-27 18:06:03,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:06:03,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:06:03,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:06:03,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:06:03,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:06:03,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217025907] [2024-06-27 18:06:03,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217025907] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:06:03,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:06:03,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:06:03,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488447610] [2024-06-27 18:06:03,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:06:03,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:06:03,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:06:03,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:06:03,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:06:03,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-27 18:06:03,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 127 transitions, 1843 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:06:03,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:06:03,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-27 18:06:03,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:06:04,134 INFO L124 PetriNetUnfolderBase]: 799/1358 cut-off events. [2024-06-27 18:06:04,134 INFO L125 PetriNetUnfolderBase]: For 22219/22225 co-relation queries the response was YES. [2024-06-27 18:06:04,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8317 conditions, 1358 events. 799/1358 cut-off events. For 22219/22225 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 6789 event pairs, 99 based on Foata normal form. 9/1350 useless extension candidates. Maximal degree in co-relation 8229. Up to 661 conditions per place. [2024-06-27 18:06:04,144 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 93 selfloop transitions, 60 changer transitions 0/160 dead transitions. [2024-06-27 18:06:04,145 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 160 transitions, 2347 flow [2024-06-27 18:06:04,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:06:04,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:06:04,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 167 transitions. [2024-06-27 18:06:04,146 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49117647058823527 [2024-06-27 18:06:04,146 INFO L175 Difference]: Start difference. First operand has 142 places, 127 transitions, 1843 flow. Second operand 10 states and 167 transitions. [2024-06-27 18:06:04,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 160 transitions, 2347 flow [2024-06-27 18:06:04,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 160 transitions, 2217 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-27 18:06:04,188 INFO L231 Difference]: Finished difference. Result has 144 places, 129 transitions, 1886 flow [2024-06-27 18:06:04,188 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1715, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1886, PETRI_PLACES=144, PETRI_TRANSITIONS=129} [2024-06-27 18:06:04,189 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 109 predicate places. [2024-06-27 18:06:04,189 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 129 transitions, 1886 flow [2024-06-27 18:06:04,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:06:04,189 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:06:04,189 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:06:04,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 18:06:04,189 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:06:04,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:06:04,190 INFO L85 PathProgramCache]: Analyzing trace with hash 316574167, now seen corresponding path program 6 times [2024-06-27 18:06:04,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:06:04,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981018882] [2024-06-27 18:06:04,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:06:04,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:06:04,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:06:04,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:06:04,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:06:04,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981018882] [2024-06-27 18:06:04,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981018882] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:06:04,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:06:04,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:06:04,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535199440] [2024-06-27 18:06:04,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:06:04,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:06:04,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:06:04,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:06:04,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:06:04,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-27 18:06:04,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 129 transitions, 1886 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:06:04,440 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:06:04,440 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-27 18:06:04,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:06:04,700 INFO L124 PetriNetUnfolderBase]: 835/1421 cut-off events. [2024-06-27 18:06:04,700 INFO L125 PetriNetUnfolderBase]: For 24198/24198 co-relation queries the response was YES. [2024-06-27 18:06:04,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8817 conditions, 1421 events. 835/1421 cut-off events. For 24198/24198 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 7253 event pairs, 107 based on Foata normal form. 12/1416 useless extension candidates. Maximal degree in co-relation 8728. Up to 693 conditions per place. [2024-06-27 18:06:04,711 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 99 selfloop transitions, 61 changer transitions 0/167 dead transitions. [2024-06-27 18:06:04,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 167 transitions, 2464 flow [2024-06-27 18:06:04,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:06:04,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:06:04,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-27 18:06:04,712 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-27 18:06:04,712 INFO L175 Difference]: Start difference. First operand has 144 places, 129 transitions, 1886 flow. Second operand 10 states and 170 transitions. [2024-06-27 18:06:04,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 167 transitions, 2464 flow [2024-06-27 18:06:04,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 167 transitions, 2360 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-27 18:06:04,761 INFO L231 Difference]: Finished difference. Result has 148 places, 133 transitions, 2002 flow [2024-06-27 18:06:04,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1786, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2002, PETRI_PLACES=148, PETRI_TRANSITIONS=133} [2024-06-27 18:06:04,762 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 113 predicate places. [2024-06-27 18:06:04,762 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 133 transitions, 2002 flow [2024-06-27 18:06:04,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:06:04,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:06:04,762 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:06:04,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 18:06:04,763 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:06:04,763 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:06:04,763 INFO L85 PathProgramCache]: Analyzing trace with hash 168728192, now seen corresponding path program 8 times [2024-06-27 18:06:04,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:06:04,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129576284] [2024-06-27 18:06:04,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:06:04,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:06:04,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:06:04,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:06:04,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:06:04,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129576284] [2024-06-27 18:06:04,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129576284] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:06:04,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:06:04,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:06:04,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198204611] [2024-06-27 18:06:04,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:06:04,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:06:04,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:06:04,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:06:04,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:06:05,003 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-27 18:06:05,003 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 133 transitions, 2002 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:06:05,003 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:06:05,003 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-27 18:06:05,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:06:05,257 INFO L124 PetriNetUnfolderBase]: 853/1448 cut-off events. [2024-06-27 18:06:05,258 INFO L125 PetriNetUnfolderBase]: For 27567/27567 co-relation queries the response was YES. [2024-06-27 18:06:05,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9257 conditions, 1448 events. 853/1448 cut-off events. For 27567/27567 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 7399 event pairs, 113 based on Foata normal form. 3/1434 useless extension candidates. Maximal degree in co-relation 9165. Up to 713 conditions per place. [2024-06-27 18:06:05,269 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 94 selfloop transitions, 65 changer transitions 0/166 dead transitions. [2024-06-27 18:06:05,269 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 166 transitions, 2567 flow [2024-06-27 18:06:05,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:06:05,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:06:05,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 167 transitions. [2024-06-27 18:06:05,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49117647058823527 [2024-06-27 18:06:05,271 INFO L175 Difference]: Start difference. First operand has 148 places, 133 transitions, 2002 flow. Second operand 10 states and 167 transitions. [2024-06-27 18:06:05,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 166 transitions, 2567 flow [2024-06-27 18:06:05,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 166 transitions, 2464 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-27 18:06:05,325 INFO L231 Difference]: Finished difference. Result has 152 places, 135 transitions, 2091 flow [2024-06-27 18:06:05,325 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1900, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2091, PETRI_PLACES=152, PETRI_TRANSITIONS=135} [2024-06-27 18:06:05,326 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 117 predicate places. [2024-06-27 18:06:05,326 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 135 transitions, 2091 flow [2024-06-27 18:06:05,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:06:05,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:06:05,326 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:06:05,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 18:06:05,326 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:06:05,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:06:05,327 INFO L85 PathProgramCache]: Analyzing trace with hash 168728347, now seen corresponding path program 7 times [2024-06-27 18:06:05,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:06:05,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834861424] [2024-06-27 18:06:05,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:06:05,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:06:05,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:06:05,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:06:05,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:06:05,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834861424] [2024-06-27 18:06:05,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834861424] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:06:05,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:06:05,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:06:05,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797761926] [2024-06-27 18:06:05,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:06:05,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:06:05,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:06:05,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:06:05,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:06:05,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-27 18:06:05,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 135 transitions, 2091 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:06:05,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:06:05,553 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-27 18:06:05,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:06:05,791 INFO L124 PetriNetUnfolderBase]: 871/1475 cut-off events. [2024-06-27 18:06:05,791 INFO L125 PetriNetUnfolderBase]: For 29257/29263 co-relation queries the response was YES. [2024-06-27 18:06:05,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9463 conditions, 1475 events. 871/1475 cut-off events. For 29257/29263 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 7542 event pairs, 111 based on Foata normal form. 9/1467 useless extension candidates. Maximal degree in co-relation 9369. Up to 737 conditions per place. [2024-06-27 18:06:05,802 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 95 selfloop transitions, 66 changer transitions 0/168 dead transitions. [2024-06-27 18:06:05,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 168 transitions, 2625 flow [2024-06-27 18:06:05,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:06:05,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:06:05,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 167 transitions. [2024-06-27 18:06:05,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49117647058823527 [2024-06-27 18:06:05,805 INFO L175 Difference]: Start difference. First operand has 152 places, 135 transitions, 2091 flow. Second operand 10 states and 167 transitions. [2024-06-27 18:06:05,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 168 transitions, 2625 flow [2024-06-27 18:06:05,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 168 transitions, 2481 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-27 18:06:05,856 INFO L231 Difference]: Finished difference. Result has 154 places, 137 transitions, 2138 flow [2024-06-27 18:06:05,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1949, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2138, PETRI_PLACES=154, PETRI_TRANSITIONS=137} [2024-06-27 18:06:05,857 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 119 predicate places. [2024-06-27 18:06:05,857 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 137 transitions, 2138 flow [2024-06-27 18:06:05,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:06:05,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:06:05,857 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:06:05,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 18:06:05,857 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:06:05,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:06:05,858 INFO L85 PathProgramCache]: Analyzing trace with hash 168666812, now seen corresponding path program 9 times [2024-06-27 18:06:05,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:06:05,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960476138] [2024-06-27 18:06:05,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:06:05,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:06:05,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:06:06,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:06:06,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:06:06,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960476138] [2024-06-27 18:06:06,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960476138] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:06:06,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:06:06,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:06:06,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735343823] [2024-06-27 18:06:06,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:06:06,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:06:06,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:06:06,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:06:06,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:06:06,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-27 18:06:06,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 137 transitions, 2138 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:06:06,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:06:06,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-27 18:06:06,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:06:06,372 INFO L124 PetriNetUnfolderBase]: 889/1505 cut-off events. [2024-06-27 18:06:06,373 INFO L125 PetriNetUnfolderBase]: For 31950/31956 co-relation queries the response was YES. [2024-06-27 18:06:06,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9801 conditions, 1505 events. 889/1505 cut-off events. For 31950/31956 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 7759 event pairs, 105 based on Foata normal form. 9/1497 useless extension candidates. Maximal degree in co-relation 9706. Up to 742 conditions per place. [2024-06-27 18:06:06,383 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 100 selfloop transitions, 67 changer transitions 0/174 dead transitions. [2024-06-27 18:06:06,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 174 transitions, 2804 flow [2024-06-27 18:06:06,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:06:06,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:06:06,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 169 transitions. [2024-06-27 18:06:06,384 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4970588235294118 [2024-06-27 18:06:06,384 INFO L175 Difference]: Start difference. First operand has 154 places, 137 transitions, 2138 flow. Second operand 10 states and 169 transitions. [2024-06-27 18:06:06,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 174 transitions, 2804 flow [2024-06-27 18:06:06,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 174 transitions, 2694 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-27 18:06:06,437 INFO L231 Difference]: Finished difference. Result has 158 places, 140 transitions, 2253 flow [2024-06-27 18:06:06,438 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2030, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2253, PETRI_PLACES=158, PETRI_TRANSITIONS=140} [2024-06-27 18:06:06,438 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 123 predicate places. [2024-06-27 18:06:06,438 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 140 transitions, 2253 flow [2024-06-27 18:06:06,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:06:06,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:06:06,438 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:06:06,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 18:06:06,439 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:06:06,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:06:06,439 INFO L85 PathProgramCache]: Analyzing trace with hash 1404542661, now seen corresponding path program 8 times [2024-06-27 18:06:06,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:06:06,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112109109] [2024-06-27 18:06:06,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:06:06,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:06:06,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:06:06,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:06:06,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:06:06,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112109109] [2024-06-27 18:06:06,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112109109] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:06:06,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:06:06,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:06:06,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773201614] [2024-06-27 18:06:06,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:06:06,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:06:06,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:06:06,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:06:06,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:06:06,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-27 18:06:06,685 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 140 transitions, 2253 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:06:06,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:06:06,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-27 18:06:06,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:06:06,997 INFO L124 PetriNetUnfolderBase]: 925/1565 cut-off events. [2024-06-27 18:06:06,997 INFO L125 PetriNetUnfolderBase]: For 34162/34168 co-relation queries the response was YES. [2024-06-27 18:06:07,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10283 conditions, 1565 events. 925/1565 cut-off events. For 34162/34168 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 8142 event pairs, 105 based on Foata normal form. 12/1560 useless extension candidates. Maximal degree in co-relation 10186. Up to 798 conditions per place. [2024-06-27 18:06:07,010 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 98 selfloop transitions, 71 changer transitions 0/176 dead transitions. [2024-06-27 18:06:07,011 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 176 transitions, 2863 flow [2024-06-27 18:06:07,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:06:07,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:06:07,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 166 transitions. [2024-06-27 18:06:07,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48823529411764705 [2024-06-27 18:06:07,015 INFO L175 Difference]: Start difference. First operand has 158 places, 140 transitions, 2253 flow. Second operand 10 states and 166 transitions. [2024-06-27 18:06:07,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 176 transitions, 2863 flow [2024-06-27 18:06:07,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 176 transitions, 2743 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-27 18:06:07,078 INFO L231 Difference]: Finished difference. Result has 161 places, 145 transitions, 2402 flow [2024-06-27 18:06:07,078 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2137, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2402, PETRI_PLACES=161, PETRI_TRANSITIONS=145} [2024-06-27 18:06:07,079 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 126 predicate places. [2024-06-27 18:06:07,079 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 145 transitions, 2402 flow [2024-06-27 18:06:07,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:06:07,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:06:07,079 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:06:07,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 18:06:07,080 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:06:07,080 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:06:07,080 INFO L85 PathProgramCache]: Analyzing trace with hash 1396268451, now seen corresponding path program 9 times [2024-06-27 18:06:07,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:06:07,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882295201] [2024-06-27 18:06:07,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:06:07,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:06:07,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:06:07,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:06:07,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:06:07,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882295201] [2024-06-27 18:06:07,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882295201] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:06:07,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:06:07,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:06:07,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493520157] [2024-06-27 18:06:07,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:06:07,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:06:07,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:06:07,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:06:07,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:06:07,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-27 18:06:07,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 145 transitions, 2402 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:06:07,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:06:07,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-27 18:06:07,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:06:07,557 INFO L124 PetriNetUnfolderBase]: 925/1565 cut-off events. [2024-06-27 18:06:07,557 INFO L125 PetriNetUnfolderBase]: For 38341/38347 co-relation queries the response was YES. [2024-06-27 18:06:07,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10605 conditions, 1565 events. 925/1565 cut-off events. For 38341/38347 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 8149 event pairs, 107 based on Foata normal form. 12/1560 useless extension candidates. Maximal degree in co-relation 10506. Up to 822 conditions per place. [2024-06-27 18:06:07,569 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 100 selfloop transitions, 73 changer transitions 0/180 dead transitions. [2024-06-27 18:06:07,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 180 transitions, 2984 flow [2024-06-27 18:06:07,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:06:07,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:06:07,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-27 18:06:07,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-27 18:06:07,584 INFO L175 Difference]: Start difference. First operand has 161 places, 145 transitions, 2402 flow. Second operand 10 states and 170 transitions. [2024-06-27 18:06:07,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 180 transitions, 2984 flow [2024-06-27 18:06:07,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 180 transitions, 2859 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-27 18:06:07,681 INFO L231 Difference]: Finished difference. Result has 166 places, 148 transitions, 2507 flow [2024-06-27 18:06:07,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2280, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2507, PETRI_PLACES=166, PETRI_TRANSITIONS=148} [2024-06-27 18:06:07,682 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 131 predicate places. [2024-06-27 18:06:07,683 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 148 transitions, 2507 flow [2024-06-27 18:06:07,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:06:07,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:06:07,683 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:06:07,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 18:06:07,683 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:06:07,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:06:07,685 INFO L85 PathProgramCache]: Analyzing trace with hash 1396262716, now seen corresponding path program 10 times [2024-06-27 18:06:07,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:06:07,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317725848] [2024-06-27 18:06:07,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:06:07,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:06:07,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:06:07,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:06:07,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:06:07,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317725848] [2024-06-27 18:06:07,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317725848] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:06:07,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:06:07,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:06:07,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909349716] [2024-06-27 18:06:07,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:06:07,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:06:07,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:06:07,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:06:07,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:06:07,883 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-27 18:06:07,883 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 148 transitions, 2507 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:06:07,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:06:07,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-27 18:06:07,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:06:08,127 INFO L124 PetriNetUnfolderBase]: 919/1556 cut-off events. [2024-06-27 18:06:08,127 INFO L125 PetriNetUnfolderBase]: For 39801/39807 co-relation queries the response was YES. [2024-06-27 18:06:08,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10565 conditions, 1556 events. 919/1556 cut-off events. For 39801/39807 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 8058 event pairs, 105 based on Foata normal form. 3/1542 useless extension candidates. Maximal degree in co-relation 10463. Up to 814 conditions per place. [2024-06-27 18:06:08,139 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 95 selfloop transitions, 75 changer transitions 0/177 dead transitions. [2024-06-27 18:06:08,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 177 transitions, 3039 flow [2024-06-27 18:06:08,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:06:08,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:06:08,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 167 transitions. [2024-06-27 18:06:08,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49117647058823527 [2024-06-27 18:06:08,141 INFO L175 Difference]: Start difference. First operand has 166 places, 148 transitions, 2507 flow. Second operand 10 states and 167 transitions. [2024-06-27 18:06:08,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 177 transitions, 3039 flow [2024-06-27 18:06:08,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 177 transitions, 2929 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-27 18:06:08,217 INFO L231 Difference]: Finished difference. Result has 171 places, 148 transitions, 2552 flow [2024-06-27 18:06:08,217 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2397, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2552, PETRI_PLACES=171, PETRI_TRANSITIONS=148} [2024-06-27 18:06:08,218 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 136 predicate places. [2024-06-27 18:06:08,218 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 148 transitions, 2552 flow [2024-06-27 18:06:08,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:06:08,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:06:08,218 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:06:08,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 18:06:08,218 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:06:08,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:06:08,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1396262871, now seen corresponding path program 10 times [2024-06-27 18:06:08,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:06:08,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657311649] [2024-06-27 18:06:08,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:06:08,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:06:08,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:06:08,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:06:08,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:06:08,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657311649] [2024-06-27 18:06:08,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657311649] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:06:08,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:06:08,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:06:08,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570895293] [2024-06-27 18:06:08,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:06:08,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:06:08,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:06:08,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:06:08,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:06:08,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-27 18:06:08,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 148 transitions, 2552 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:06:08,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:06:08,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-27 18:06:08,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:06:08,715 INFO L124 PetriNetUnfolderBase]: 937/1586 cut-off events. [2024-06-27 18:06:08,716 INFO L125 PetriNetUnfolderBase]: For 42420/42426 co-relation queries the response was YES. [2024-06-27 18:06:08,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10778 conditions, 1586 events. 937/1586 cut-off events. For 42420/42426 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 8272 event pairs, 117 based on Foata normal form. 3/1572 useless extension candidates. Maximal degree in co-relation 10673. Up to 838 conditions per place. [2024-06-27 18:06:08,727 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 96 selfloop transitions, 76 changer transitions 0/179 dead transitions. [2024-06-27 18:06:08,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 179 transitions, 3108 flow [2024-06-27 18:06:08,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:06:08,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:06:08,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 167 transitions. [2024-06-27 18:06:08,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49117647058823527 [2024-06-27 18:06:08,729 INFO L175 Difference]: Start difference. First operand has 171 places, 148 transitions, 2552 flow. Second operand 10 states and 167 transitions. [2024-06-27 18:06:08,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 179 transitions, 3108 flow [2024-06-27 18:06:08,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 179 transitions, 2896 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-27 18:06:08,799 INFO L231 Difference]: Finished difference. Result has 172 places, 150 transitions, 2561 flow [2024-06-27 18:06:08,800 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2342, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2561, PETRI_PLACES=172, PETRI_TRANSITIONS=150} [2024-06-27 18:06:08,800 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 137 predicate places. [2024-06-27 18:06:08,800 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 150 transitions, 2561 flow [2024-06-27 18:06:08,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:06:08,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:06:08,801 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:06:08,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 18:06:08,801 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:06:08,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:06:08,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1963042471, now seen corresponding path program 1 times [2024-06-27 18:06:08,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:06:08,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736949879] [2024-06-27 18:06:08,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:06:08,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:06:08,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:06:09,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:06:09,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:06:09,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736949879] [2024-06-27 18:06:09,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736949879] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:06:09,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:06:09,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:06:09,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223985563] [2024-06-27 18:06:09,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:06:09,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:06:09,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:06:09,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:06:09,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:06:09,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-27 18:06:09,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 150 transitions, 2561 flow. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:06:09,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:06:09,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-27 18:06:09,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:06:09,418 INFO L124 PetriNetUnfolderBase]: 991/1680 cut-off events. [2024-06-27 18:06:09,418 INFO L125 PetriNetUnfolderBase]: For 48161/48166 co-relation queries the response was YES. [2024-06-27 18:06:09,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11274 conditions, 1680 events. 991/1680 cut-off events. For 48161/48166 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 8885 event pairs, 60 based on Foata normal form. 13/1676 useless extension candidates. Maximal degree in co-relation 11169. Up to 685 conditions per place. [2024-06-27 18:06:09,430 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 111 selfloop transitions, 82 changer transitions 0/200 dead transitions. [2024-06-27 18:06:09,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 200 transitions, 3395 flow [2024-06-27 18:06:09,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 18:06:09,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 18:06:09,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 195 transitions. [2024-06-27 18:06:09,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5213903743315508 [2024-06-27 18:06:09,431 INFO L175 Difference]: Start difference. First operand has 172 places, 150 transitions, 2561 flow. Second operand 11 states and 195 transitions. [2024-06-27 18:06:09,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 200 transitions, 3395 flow [2024-06-27 18:06:09,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 200 transitions, 3262 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-27 18:06:09,510 INFO L231 Difference]: Finished difference. Result has 176 places, 151 transitions, 2624 flow [2024-06-27 18:06:09,510 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2429, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2624, PETRI_PLACES=176, PETRI_TRANSITIONS=151} [2024-06-27 18:06:09,511 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 141 predicate places. [2024-06-27 18:06:09,511 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 151 transitions, 2624 flow [2024-06-27 18:06:09,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:06:09,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:06:09,511 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:06:09,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 18:06:09,512 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:06:09,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:06:09,512 INFO L85 PathProgramCache]: Analyzing trace with hash 662938569, now seen corresponding path program 2 times [2024-06-27 18:06:09,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:06:09,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81849670] [2024-06-27 18:06:09,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:06:09,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:06:09,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:06:09,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:06:09,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:06:09,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81849670] [2024-06-27 18:06:09,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81849670] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:06:09,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:06:09,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:06:09,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049506680] [2024-06-27 18:06:09,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:06:09,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:06:09,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:06:09,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:06:09,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:06:09,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-27 18:06:09,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 151 transitions, 2624 flow. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:06:09,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:06:09,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-27 18:06:09,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:06:10,139 INFO L124 PetriNetUnfolderBase]: 1045/1767 cut-off events. [2024-06-27 18:06:10,140 INFO L125 PetriNetUnfolderBase]: For 53897/53902 co-relation queries the response was YES. [2024-06-27 18:06:10,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11789 conditions, 1767 events. 1045/1767 cut-off events. For 53897/53902 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 9484 event pairs, 126 based on Foata normal form. 13/1763 useless extension candidates. Maximal degree in co-relation 11682. Up to 856 conditions per place. [2024-06-27 18:06:10,153 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 111 selfloop transitions, 80 changer transitions 0/198 dead transitions. [2024-06-27 18:06:10,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 198 transitions, 3393 flow [2024-06-27 18:06:10,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 18:06:10,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 18:06:10,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 193 transitions. [2024-06-27 18:06:10,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.516042780748663 [2024-06-27 18:06:10,154 INFO L175 Difference]: Start difference. First operand has 176 places, 151 transitions, 2624 flow. Second operand 11 states and 193 transitions. [2024-06-27 18:06:10,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 198 transitions, 3393 flow [2024-06-27 18:06:10,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 198 transitions, 3242 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 18:06:10,237 INFO L231 Difference]: Finished difference. Result has 180 places, 152 transitions, 2666 flow [2024-06-27 18:06:10,237 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2475, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2666, PETRI_PLACES=180, PETRI_TRANSITIONS=152} [2024-06-27 18:06:10,238 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 145 predicate places. [2024-06-27 18:06:10,238 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 152 transitions, 2666 flow [2024-06-27 18:06:10,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:06:10,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:06:10,239 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:06:10,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 18:06:10,244 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:06:10,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:06:10,244 INFO L85 PathProgramCache]: Analyzing trace with hash 663058539, now seen corresponding path program 3 times [2024-06-27 18:06:10,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:06:10,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878710825] [2024-06-27 18:06:10,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:06:10,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:06:10,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:06:10,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:06:10,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:06:10,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878710825] [2024-06-27 18:06:10,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878710825] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:06:10,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:06:10,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:06:10,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120622625] [2024-06-27 18:06:10,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:06:10,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:06:10,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:06:10,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:06:10,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:06:10,514 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-27 18:06:10,516 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 152 transitions, 2666 flow. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:06:10,516 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:06:10,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-27 18:06:10,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:06:10,896 INFO L124 PetriNetUnfolderBase]: 1099/1860 cut-off events. [2024-06-27 18:06:10,896 INFO L125 PetriNetUnfolderBase]: For 58599/58599 co-relation queries the response was YES. [2024-06-27 18:06:10,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12315 conditions, 1860 events. 1099/1860 cut-off events. For 58599/58599 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 10121 event pairs, 150 based on Foata normal form. 9/1852 useless extension candidates. Maximal degree in co-relation 12207. Up to 947 conditions per place. [2024-06-27 18:06:10,915 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 107 selfloop transitions, 82 changer transitions 0/196 dead transitions. [2024-06-27 18:06:10,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 196 transitions, 3325 flow [2024-06-27 18:06:10,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 18:06:10,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 18:06:10,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 191 transitions. [2024-06-27 18:06:10,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5106951871657754 [2024-06-27 18:06:10,917 INFO L175 Difference]: Start difference. First operand has 180 places, 152 transitions, 2666 flow. Second operand 11 states and 191 transitions. [2024-06-27 18:06:10,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 196 transitions, 3325 flow [2024-06-27 18:06:11,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 196 transitions, 3182 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 18:06:11,028 INFO L231 Difference]: Finished difference. Result has 185 places, 153 transitions, 2720 flow [2024-06-27 18:06:11,028 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2525, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2720, PETRI_PLACES=185, PETRI_TRANSITIONS=153} [2024-06-27 18:06:11,028 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 150 predicate places. [2024-06-27 18:06:11,028 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 153 transitions, 2720 flow [2024-06-27 18:06:11,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:06:11,029 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:06:11,029 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:06:11,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 18:06:11,029 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:06:11,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:06:11,029 INFO L85 PathProgramCache]: Analyzing trace with hash 663053889, now seen corresponding path program 4 times [2024-06-27 18:06:11,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:06:11,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572114806] [2024-06-27 18:06:11,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:06:11,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:06:11,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:06:11,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:06:11,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:06:11,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572114806] [2024-06-27 18:06:11,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572114806] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:06:11,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:06:11,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:06:11,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388938384] [2024-06-27 18:06:11,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:06:11,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:06:11,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:06:11,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:06:11,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:06:11,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-27 18:06:11,343 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 153 transitions, 2720 flow. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:06:11,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:06:11,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-27 18:06:11,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:06:11,742 INFO L124 PetriNetUnfolderBase]: 1153/1947 cut-off events. [2024-06-27 18:06:11,742 INFO L125 PetriNetUnfolderBase]: For 62521/62526 co-relation queries the response was YES. [2024-06-27 18:06:11,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12859 conditions, 1947 events. 1153/1947 cut-off events. For 62521/62526 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 10702 event pairs, 168 based on Foata normal form. 13/1943 useless extension candidates. Maximal degree in co-relation 12750. Up to 1019 conditions per place. [2024-06-27 18:06:11,754 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 107 selfloop transitions, 83 changer transitions 0/197 dead transitions. [2024-06-27 18:06:11,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 197 transitions, 3425 flow [2024-06-27 18:06:11,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 18:06:11,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 18:06:11,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 191 transitions. [2024-06-27 18:06:11,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5106951871657754 [2024-06-27 18:06:11,755 INFO L175 Difference]: Start difference. First operand has 185 places, 153 transitions, 2720 flow. Second operand 11 states and 191 transitions. [2024-06-27 18:06:11,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 197 transitions, 3425 flow [2024-06-27 18:06:11,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 197 transitions, 3247 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-06-27 18:06:11,857 INFO L231 Difference]: Finished difference. Result has 186 places, 154 transitions, 2741 flow [2024-06-27 18:06:11,857 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2544, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2741, PETRI_PLACES=186, PETRI_TRANSITIONS=154} [2024-06-27 18:06:11,857 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 151 predicate places. [2024-06-27 18:06:11,857 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 154 transitions, 2741 flow [2024-06-27 18:06:11,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:06:11,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:06:11,858 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:06:11,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 18:06:11,858 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:06:11,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:06:11,858 INFO L85 PathProgramCache]: Analyzing trace with hash 1507062269, now seen corresponding path program 5 times [2024-06-27 18:06:11,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:06:11,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078037009] [2024-06-27 18:06:11,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:06:11,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:06:11,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:06:12,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:06:12,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:06:12,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078037009] [2024-06-27 18:06:12,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078037009] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:06:12,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:06:12,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:06:12,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27989275] [2024-06-27 18:06:12,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:06:12,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:06:12,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:06:12,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:06:12,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:06:12,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-27 18:06:12,125 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 154 transitions, 2741 flow. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:06:12,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:06:12,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-27 18:06:12,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:06:12,468 INFO L124 PetriNetUnfolderBase]: 1207/2037 cut-off events. [2024-06-27 18:06:12,469 INFO L125 PetriNetUnfolderBase]: For 66993/66998 co-relation queries the response was YES. [2024-06-27 18:06:12,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13379 conditions, 2037 events. 1207/2037 cut-off events. For 66993/66998 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 11307 event pairs, 186 based on Foata normal form. 13/2033 useless extension candidates. Maximal degree in co-relation 13269. Up to 1112 conditions per place. [2024-06-27 18:06:12,485 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 109 selfloop transitions, 79 changer transitions 0/195 dead transitions. [2024-06-27 18:06:12,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 195 transitions, 3434 flow [2024-06-27 18:06:12,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 18:06:12,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 18:06:12,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 187 transitions. [2024-06-27 18:06:12,486 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-27 18:06:12,486 INFO L175 Difference]: Start difference. First operand has 186 places, 154 transitions, 2741 flow. Second operand 11 states and 187 transitions. [2024-06-27 18:06:12,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 195 transitions, 3434 flow [2024-06-27 18:06:12,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 195 transitions, 3270 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-27 18:06:12,629 INFO L231 Difference]: Finished difference. Result has 189 places, 155 transitions, 2768 flow [2024-06-27 18:06:12,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2579, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2768, PETRI_PLACES=189, PETRI_TRANSITIONS=155} [2024-06-27 18:06:12,629 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 154 predicate places. [2024-06-27 18:06:12,629 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 155 transitions, 2768 flow [2024-06-27 18:06:12,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:06:12,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:06:12,630 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:06:12,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 18:06:12,630 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:06:12,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:06:12,630 INFO L85 PathProgramCache]: Analyzing trace with hash 1505159489, now seen corresponding path program 6 times [2024-06-27 18:06:12,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:06:12,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032489824] [2024-06-27 18:06:12,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:06:12,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:06:12,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:06:12,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:06:12,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:06:12,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032489824] [2024-06-27 18:06:12,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032489824] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:06:12,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:06:12,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:06:12,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464533689] [2024-06-27 18:06:12,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:06:12,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:06:12,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:06:12,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:06:12,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:06:12,894 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-27 18:06:12,894 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 155 transitions, 2768 flow. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:06:12,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:06:12,894 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-27 18:06:12,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:06:13,360 INFO L124 PetriNetUnfolderBase]: 1261/2127 cut-off events. [2024-06-27 18:06:13,360 INFO L125 PetriNetUnfolderBase]: For 72476/72476 co-relation queries the response was YES. [2024-06-27 18:06:13,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13896 conditions, 2127 events. 1261/2127 cut-off events. For 72476/72476 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 11962 event pairs, 198 based on Foata normal form. 9/2119 useless extension candidates. Maximal degree in co-relation 13785. Up to 1165 conditions per place. [2024-06-27 18:06:13,386 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 113 selfloop transitions, 79 changer transitions 0/199 dead transitions. [2024-06-27 18:06:13,386 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 199 transitions, 3531 flow [2024-06-27 18:06:13,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 18:06:13,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 18:06:13,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 189 transitions. [2024-06-27 18:06:13,387 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5053475935828877 [2024-06-27 18:06:13,387 INFO L175 Difference]: Start difference. First operand has 189 places, 155 transitions, 2768 flow. Second operand 11 states and 189 transitions. [2024-06-27 18:06:13,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 199 transitions, 3531 flow [2024-06-27 18:06:13,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 199 transitions, 3379 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 18:06:13,561 INFO L231 Difference]: Finished difference. Result has 193 places, 156 transitions, 2807 flow [2024-06-27 18:06:13,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2618, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2807, PETRI_PLACES=193, PETRI_TRANSITIONS=156} [2024-06-27 18:06:13,561 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 158 predicate places. [2024-06-27 18:06:13,562 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 156 transitions, 2807 flow [2024-06-27 18:06:13,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:06:13,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:06:13,562 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:06:13,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 18:06:13,562 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:06:13,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:06:13,562 INFO L85 PathProgramCache]: Analyzing trace with hash 1589589163, now seen corresponding path program 7 times [2024-06-27 18:06:13,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:06:13,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652806811] [2024-06-27 18:06:13,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:06:13,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:06:13,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:06:13,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:06:13,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:06:13,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652806811] [2024-06-27 18:06:13,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652806811] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:06:13,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:06:13,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:06:13,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049491669] [2024-06-27 18:06:13,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:06:13,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:06:13,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:06:13,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:06:13,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:06:13,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-27 18:06:13,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 156 transitions, 2807 flow. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:06:13,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:06:13,848 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-27 18:06:13,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:06:14,235 INFO L124 PetriNetUnfolderBase]: 1315/2217 cut-off events. [2024-06-27 18:06:14,236 INFO L125 PetriNetUnfolderBase]: For 77949/77949 co-relation queries the response was YES. [2024-06-27 18:06:14,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14437 conditions, 2217 events. 1315/2217 cut-off events. For 77949/77949 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 12624 event pairs, 198 based on Foata normal form. 9/2209 useless extension candidates. Maximal degree in co-relation 14325. Up to 1256 conditions per place. [2024-06-27 18:06:14,253 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 109 selfloop transitions, 81 changer transitions 0/197 dead transitions. [2024-06-27 18:06:14,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 197 transitions, 3460 flow [2024-06-27 18:06:14,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 18:06:14,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 18:06:14,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 187 transitions. [2024-06-27 18:06:14,254 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-27 18:06:14,254 INFO L175 Difference]: Start difference. First operand has 193 places, 156 transitions, 2807 flow. Second operand 11 states and 187 transitions. [2024-06-27 18:06:14,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 197 transitions, 3460 flow [2024-06-27 18:06:14,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 197 transitions, 3300 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-27 18:06:14,388 INFO L231 Difference]: Finished difference. Result has 195 places, 157 transitions, 2842 flow [2024-06-27 18:06:14,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2649, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2842, PETRI_PLACES=195, PETRI_TRANSITIONS=157} [2024-06-27 18:06:14,390 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 160 predicate places. [2024-06-27 18:06:14,390 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 157 transitions, 2842 flow [2024-06-27 18:06:14,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:06:14,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:06:14,390 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:06:14,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 18:06:14,391 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:06:14,391 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:06:14,391 INFO L85 PathProgramCache]: Analyzing trace with hash 1795320043, now seen corresponding path program 8 times [2024-06-27 18:06:14,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:06:14,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753639160] [2024-06-27 18:06:14,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:06:14,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:06:14,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:06:14,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:06:14,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:06:14,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753639160] [2024-06-27 18:06:14,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753639160] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:06:14,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:06:14,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:06:14,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707637079] [2024-06-27 18:06:14,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:06:14,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:06:14,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:06:14,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:06:14,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:06:14,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-27 18:06:14,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 157 transitions, 2842 flow. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:06:14,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:06:14,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-27 18:06:14,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:06:15,045 INFO L124 PetriNetUnfolderBase]: 1369/2307 cut-off events. [2024-06-27 18:06:15,045 INFO L125 PetriNetUnfolderBase]: For 81661/81666 co-relation queries the response was YES. [2024-06-27 18:06:15,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14966 conditions, 2307 events. 1369/2307 cut-off events. For 81661/81666 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 13268 event pairs, 240 based on Foata normal form. 13/2303 useless extension candidates. Maximal degree in co-relation 14853. Up to 1332 conditions per place. [2024-06-27 18:06:15,064 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 115 selfloop transitions, 79 changer transitions 0/201 dead transitions. [2024-06-27 18:06:15,064 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 201 transitions, 3521 flow [2024-06-27 18:06:15,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 18:06:15,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 18:06:15,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 189 transitions. [2024-06-27 18:06:15,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5053475935828877 [2024-06-27 18:06:15,065 INFO L175 Difference]: Start difference. First operand has 195 places, 157 transitions, 2842 flow. Second operand 11 states and 189 transitions. [2024-06-27 18:06:15,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 201 transitions, 3521 flow [2024-06-27 18:06:15,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 201 transitions, 3357 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-27 18:06:15,203 INFO L231 Difference]: Finished difference. Result has 197 places, 158 transitions, 2869 flow [2024-06-27 18:06:15,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2680, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2869, PETRI_PLACES=197, PETRI_TRANSITIONS=158} [2024-06-27 18:06:15,204 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 162 predicate places. [2024-06-27 18:06:15,204 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 158 transitions, 2869 flow [2024-06-27 18:06:15,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:06:15,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:06:15,204 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:06:15,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 18:06:15,205 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:06:15,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:06:15,205 INFO L85 PathProgramCache]: Analyzing trace with hash 1787992573, now seen corresponding path program 9 times [2024-06-27 18:06:15,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:06:15,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481698207] [2024-06-27 18:06:15,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:06:15,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:06:15,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:06:15,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:06:15,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:06:15,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481698207] [2024-06-27 18:06:15,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481698207] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:06:15,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:06:15,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:06:15,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870287503] [2024-06-27 18:06:15,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:06:15,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:06:15,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:06:15,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:06:15,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:06:15,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-27 18:06:15,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 158 transitions, 2869 flow. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:06:15,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:06:15,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-27 18:06:15,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:06:15,894 INFO L124 PetriNetUnfolderBase]: 1423/2397 cut-off events. [2024-06-27 18:06:15,894 INFO L125 PetriNetUnfolderBase]: For 86372/86377 co-relation queries the response was YES. [2024-06-27 18:06:15,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15489 conditions, 2397 events. 1423/2397 cut-off events. For 86372/86377 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 13965 event pairs, 240 based on Foata normal form. 13/2393 useless extension candidates. Maximal degree in co-relation 15375. Up to 1405 conditions per place. [2024-06-27 18:06:15,914 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 110 selfloop transitions, 82 changer transitions 0/199 dead transitions. [2024-06-27 18:06:15,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 199 transitions, 3570 flow [2024-06-27 18:06:15,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 18:06:15,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 18:06:15,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 187 transitions. [2024-06-27 18:06:15,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-27 18:06:15,915 INFO L175 Difference]: Start difference. First operand has 197 places, 158 transitions, 2869 flow. Second operand 11 states and 187 transitions. [2024-06-27 18:06:15,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 199 transitions, 3570 flow [2024-06-27 18:06:16,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 199 transitions, 3410 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-27 18:06:16,068 INFO L231 Difference]: Finished difference. Result has 199 places, 159 transitions, 2906 flow [2024-06-27 18:06:16,068 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2711, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2906, PETRI_PLACES=199, PETRI_TRANSITIONS=159} [2024-06-27 18:06:16,069 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 164 predicate places. [2024-06-27 18:06:16,069 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 159 transitions, 2906 flow [2024-06-27 18:06:16,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:06:16,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:06:16,069 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:06:16,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 18:06:16,069 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:06:16,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:06:16,070 INFO L85 PathProgramCache]: Analyzing trace with hash 1787997223, now seen corresponding path program 10 times [2024-06-27 18:06:16,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:06:16,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917892556] [2024-06-27 18:06:16,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:06:16,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:06:16,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:06:16,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:06:16,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:06:16,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917892556] [2024-06-27 18:06:16,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917892556] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:06:16,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:06:16,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:06:16,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439463551] [2024-06-27 18:06:16,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:06:16,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:06:16,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:06:16,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:06:16,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:06:16,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-27 18:06:16,348 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 159 transitions, 2906 flow. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:06:16,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:06:16,348 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-27 18:06:16,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:06:16,769 INFO L124 PetriNetUnfolderBase]: 1477/2487 cut-off events. [2024-06-27 18:06:16,769 INFO L125 PetriNetUnfolderBase]: For 91994/91994 co-relation queries the response was YES. [2024-06-27 18:06:16,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16027 conditions, 2487 events. 1477/2487 cut-off events. For 91994/91994 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 14613 event pairs, 234 based on Foata normal form. 9/2479 useless extension candidates. Maximal degree in co-relation 15912. Up to 1477 conditions per place. [2024-06-27 18:06:16,790 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 110 selfloop transitions, 83 changer transitions 0/200 dead transitions. [2024-06-27 18:06:16,790 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 200 transitions, 3565 flow [2024-06-27 18:06:16,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 18:06:16,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 18:06:16,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 187 transitions. [2024-06-27 18:06:16,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-27 18:06:16,791 INFO L175 Difference]: Start difference. First operand has 199 places, 159 transitions, 2906 flow. Second operand 11 states and 187 transitions. [2024-06-27 18:06:16,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 200 transitions, 3565 flow [2024-06-27 18:06:16,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 200 transitions, 3402 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-27 18:06:16,938 INFO L231 Difference]: Finished difference. Result has 202 places, 160 transitions, 2942 flow [2024-06-27 18:06:16,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2745, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2942, PETRI_PLACES=202, PETRI_TRANSITIONS=160} [2024-06-27 18:06:16,939 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 167 predicate places. [2024-06-27 18:06:16,939 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 160 transitions, 2942 flow [2024-06-27 18:06:16,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:06:16,939 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:06:16,939 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:06:16,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 18:06:16,939 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:06:16,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:06:16,940 INFO L85 PathProgramCache]: Analyzing trace with hash 2060737865, now seen corresponding path program 11 times [2024-06-27 18:06:16,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:06:16,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208661741] [2024-06-27 18:06:16,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:06:16,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:06:16,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:06:17,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:06:17,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:06:17,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208661741] [2024-06-27 18:06:17,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208661741] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:06:17,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:06:17,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:06:17,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515305227] [2024-06-27 18:06:17,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:06:17,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:06:17,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:06:17,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:06:17,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:06:17,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-27 18:06:17,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 160 transitions, 2942 flow. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:06:17,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:06:17,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-27 18:06:17,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:06:17,689 INFO L124 PetriNetUnfolderBase]: 1531/2573 cut-off events. [2024-06-27 18:06:17,689 INFO L125 PetriNetUnfolderBase]: For 95789/95795 co-relation queries the response was YES. [2024-06-27 18:06:17,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16558 conditions, 2573 events. 1531/2573 cut-off events. For 95789/95795 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 15234 event pairs, 279 based on Foata normal form. 15/2571 useless extension candidates. Maximal degree in co-relation 16442. Up to 1548 conditions per place. [2024-06-27 18:06:17,713 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 112 selfloop transitions, 82 changer transitions 0/201 dead transitions. [2024-06-27 18:06:17,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 201 transitions, 3613 flow [2024-06-27 18:06:17,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 18:06:17,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 18:06:17,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 186 transitions. [2024-06-27 18:06:17,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49732620320855614 [2024-06-27 18:06:17,714 INFO L175 Difference]: Start difference. First operand has 202 places, 160 transitions, 2942 flow. Second operand 11 states and 186 transitions. [2024-06-27 18:06:17,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 201 transitions, 3613 flow [2024-06-27 18:06:17,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 201 transitions, 3445 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-27 18:06:17,875 INFO L231 Difference]: Finished difference. Result has 204 places, 161 transitions, 2971 flow [2024-06-27 18:06:17,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2776, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2971, PETRI_PLACES=204, PETRI_TRANSITIONS=161} [2024-06-27 18:06:17,875 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 169 predicate places. [2024-06-27 18:06:17,876 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 161 transitions, 2971 flow [2024-06-27 18:06:17,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:06:17,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:06:17,876 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:06:17,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 18:06:17,876 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:06:17,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:06:17,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1216537767, now seen corresponding path program 12 times [2024-06-27 18:06:17,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:06:17,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491962413] [2024-06-27 18:06:17,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:06:17,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:06:17,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:06:18,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:06:18,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:06:18,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491962413] [2024-06-27 18:06:18,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491962413] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:06:18,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:06:18,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:06:18,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335711289] [2024-06-27 18:06:18,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:06:18,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:06:18,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:06:18,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:06:18,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:06:18,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-27 18:06:18,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 161 transitions, 2971 flow. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:06:18,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:06:18,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-27 18:06:18,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:06:18,546 INFO L124 PetriNetUnfolderBase]: 1585/2663 cut-off events. [2024-06-27 18:06:18,546 INFO L125 PetriNetUnfolderBase]: For 100452/100452 co-relation queries the response was YES. [2024-06-27 18:06:18,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17081 conditions, 2663 events. 1585/2663 cut-off events. For 100452/100452 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 15968 event pairs, 279 based on Foata normal form. 9/2655 useless extension candidates. Maximal degree in co-relation 16964. Up to 1621 conditions per place. [2024-06-27 18:06:18,566 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 107 selfloop transitions, 85 changer transitions 0/199 dead transitions. [2024-06-27 18:06:18,567 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 199 transitions, 3664 flow [2024-06-27 18:06:18,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 18:06:18,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 18:06:18,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 184 transitions. [2024-06-27 18:06:18,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4919786096256685 [2024-06-27 18:06:18,567 INFO L175 Difference]: Start difference. First operand has 204 places, 161 transitions, 2971 flow. Second operand 11 states and 184 transitions. [2024-06-27 18:06:18,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 199 transitions, 3664 flow [2024-06-27 18:06:18,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 199 transitions, 3498 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-27 18:06:18,721 INFO L231 Difference]: Finished difference. Result has 206 places, 162 transitions, 3008 flow [2024-06-27 18:06:18,721 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2807, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3008, PETRI_PLACES=206, PETRI_TRANSITIONS=162} [2024-06-27 18:06:18,722 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 171 predicate places. [2024-06-27 18:06:18,722 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 162 transitions, 3008 flow [2024-06-27 18:06:18,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:06:18,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:06:18,722 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:06:18,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 18:06:18,722 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:06:18,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:06:18,723 INFO L85 PathProgramCache]: Analyzing trace with hash 2053415045, now seen corresponding path program 13 times [2024-06-27 18:06:18,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:06:18,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557829495] [2024-06-27 18:06:18,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:06:18,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:06:18,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:06:18,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:06:18,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:06:18,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557829495] [2024-06-27 18:06:18,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557829495] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:06:18,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:06:18,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:06:18,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599804939] [2024-06-27 18:06:18,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:06:18,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:06:18,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:06:18,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:06:18,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:06:18,991 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-27 18:06:18,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 162 transitions, 3008 flow. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:06:18,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:06:18,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-27 18:06:18,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:06:19,474 INFO L124 PetriNetUnfolderBase]: 1639/2753 cut-off events. [2024-06-27 18:06:19,475 INFO L125 PetriNetUnfolderBase]: For 105155/105161 co-relation queries the response was YES. [2024-06-27 18:06:19,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17619 conditions, 2753 events. 1639/2753 cut-off events. For 105155/105161 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 16564 event pairs, 297 based on Foata normal form. 15/2751 useless extension candidates. Maximal degree in co-relation 17501. Up to 1693 conditions per place. [2024-06-27 18:06:19,495 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 107 selfloop transitions, 86 changer transitions 0/200 dead transitions. [2024-06-27 18:06:19,495 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 200 transitions, 3659 flow [2024-06-27 18:06:19,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 18:06:19,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 18:06:19,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 184 transitions. [2024-06-27 18:06:19,496 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4919786096256685 [2024-06-27 18:06:19,496 INFO L175 Difference]: Start difference. First operand has 206 places, 162 transitions, 3008 flow. Second operand 11 states and 184 transitions. [2024-06-27 18:06:19,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 200 transitions, 3659 flow [2024-06-27 18:06:19,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 200 transitions, 3487 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-27 18:06:19,663 INFO L231 Difference]: Finished difference. Result has 208 places, 163 transitions, 3041 flow [2024-06-27 18:06:19,663 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2838, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3041, PETRI_PLACES=208, PETRI_TRANSITIONS=163} [2024-06-27 18:06:19,664 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 173 predicate places. [2024-06-27 18:06:19,664 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 163 transitions, 3041 flow [2024-06-27 18:06:19,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:06:19,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:06:19,664 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:06:19,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 18:06:19,664 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:06:19,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:06:19,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1854887015, now seen corresponding path program 14 times [2024-06-27 18:06:19,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:06:19,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449334018] [2024-06-27 18:06:19,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:06:19,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:06:19,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:06:19,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:06:19,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:06:19,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449334018] [2024-06-27 18:06:19,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449334018] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:06:19,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:06:19,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:06:19,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470252686] [2024-06-27 18:06:19,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:06:19,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:06:19,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:06:19,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:06:19,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:06:19,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-27 18:06:19,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 163 transitions, 3041 flow. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:06:19,888 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:06:19,888 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-27 18:06:19,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:06:20,331 INFO L124 PetriNetUnfolderBase]: 1693/2843 cut-off events. [2024-06-27 18:06:20,331 INFO L125 PetriNetUnfolderBase]: For 108671/108671 co-relation queries the response was YES. [2024-06-27 18:06:20,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18151 conditions, 2843 events. 1693/2843 cut-off events. For 108671/108671 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 17216 event pairs, 309 based on Foata normal form. 9/2835 useless extension candidates. Maximal degree in co-relation 18032. Up to 1741 conditions per place. [2024-06-27 18:06:20,399 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 110 selfloop transitions, 87 changer transitions 0/204 dead transitions. [2024-06-27 18:06:20,399 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 204 transitions, 3806 flow [2024-06-27 18:06:20,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 18:06:20,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 18:06:20,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 186 transitions. [2024-06-27 18:06:20,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49732620320855614 [2024-06-27 18:06:20,413 INFO L175 Difference]: Start difference. First operand has 208 places, 163 transitions, 3041 flow. Second operand 11 states and 186 transitions. [2024-06-27 18:06:20,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 204 transitions, 3806 flow [2024-06-27 18:06:20,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 204 transitions, 3635 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-27 18:06:20,578 INFO L231 Difference]: Finished difference. Result has 211 places, 164 transitions, 3077 flow [2024-06-27 18:06:20,579 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2872, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3077, PETRI_PLACES=211, PETRI_TRANSITIONS=164} [2024-06-27 18:06:20,579 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 176 predicate places. [2024-06-27 18:06:20,579 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 164 transitions, 3077 flow [2024-06-27 18:06:20,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:06:20,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:06:20,579 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:06:20,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 18:06:20,579 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:06:20,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:06:20,580 INFO L85 PathProgramCache]: Analyzing trace with hash 935607463, now seen corresponding path program 15 times [2024-06-27 18:06:20,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:06:20,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102647090] [2024-06-27 18:06:20,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:06:20,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:06:20,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:06:20,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:06:20,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:06:20,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102647090] [2024-06-27 18:06:20,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102647090] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:06:20,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:06:20,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:06:20,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188962539] [2024-06-27 18:06:20,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:06:20,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:06:20,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:06:20,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:06:20,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:06:20,801 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-27 18:06:20,801 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 164 transitions, 3077 flow. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:06:20,801 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:06:20,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-27 18:06:20,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:06:21,270 INFO L124 PetriNetUnfolderBase]: 1747/2933 cut-off events. [2024-06-27 18:06:21,270 INFO L125 PetriNetUnfolderBase]: For 114549/114549 co-relation queries the response was YES. [2024-06-27 18:06:21,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18692 conditions, 2933 events. 1747/2933 cut-off events. For 114549/114549 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 17954 event pairs, 333 based on Foata normal form. 9/2925 useless extension candidates. Maximal degree in co-relation 18572. Up to 1832 conditions per place. [2024-06-27 18:06:21,295 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 106 selfloop transitions, 89 changer transitions 0/202 dead transitions. [2024-06-27 18:06:21,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 202 transitions, 3776 flow [2024-06-27 18:06:21,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 18:06:21,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 18:06:21,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 184 transitions. [2024-06-27 18:06:21,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4919786096256685 [2024-06-27 18:06:21,296 INFO L175 Difference]: Start difference. First operand has 211 places, 164 transitions, 3077 flow. Second operand 11 states and 184 transitions. [2024-06-27 18:06:21,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 202 transitions, 3776 flow [2024-06-27 18:06:21,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 202 transitions, 3600 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-27 18:06:21,560 INFO L231 Difference]: Finished difference. Result has 213 places, 165 transitions, 3112 flow [2024-06-27 18:06:21,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2903, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3112, PETRI_PLACES=213, PETRI_TRANSITIONS=165} [2024-06-27 18:06:21,561 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 178 predicate places. [2024-06-27 18:06:21,561 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 165 transitions, 3112 flow [2024-06-27 18:06:21,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:06:21,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:06:21,562 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:06:21,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 18:06:21,562 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:06:21,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:06:21,562 INFO L85 PathProgramCache]: Analyzing trace with hash 935612113, now seen corresponding path program 16 times [2024-06-27 18:06:21,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:06:21,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421012159] [2024-06-27 18:06:21,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:06:21,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:06:21,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:06:21,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:06:21,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:06:21,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421012159] [2024-06-27 18:06:21,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421012159] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:06:21,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:06:21,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:06:21,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577882231] [2024-06-27 18:06:21,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:06:21,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:06:21,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:06:21,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:06:21,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:06:21,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-27 18:06:21,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 165 transitions, 3112 flow. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:06:21,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:06:21,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-27 18:06:21,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:06:22,359 INFO L124 PetriNetUnfolderBase]: 1801/3023 cut-off events. [2024-06-27 18:06:22,360 INFO L125 PetriNetUnfolderBase]: For 120542/120548 co-relation queries the response was YES. [2024-06-27 18:06:22,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19221 conditions, 3023 events. 1801/3023 cut-off events. For 120542/120548 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 18596 event pairs, 327 based on Foata normal form. 15/3021 useless extension candidates. Maximal degree in co-relation 19100. Up to 1904 conditions per place. [2024-06-27 18:06:22,389 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 106 selfloop transitions, 90 changer transitions 0/203 dead transitions. [2024-06-27 18:06:22,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 203 transitions, 3769 flow [2024-06-27 18:06:22,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 18:06:22,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 18:06:22,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 184 transitions. [2024-06-27 18:06:22,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4919786096256685 [2024-06-27 18:06:22,390 INFO L175 Difference]: Start difference. First operand has 213 places, 165 transitions, 3112 flow. Second operand 11 states and 184 transitions. [2024-06-27 18:06:22,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 203 transitions, 3769 flow [2024-06-27 18:06:22,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 203 transitions, 3592 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-27 18:06:22,624 INFO L231 Difference]: Finished difference. Result has 216 places, 166 transitions, 3148 flow [2024-06-27 18:06:22,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2937, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3148, PETRI_PLACES=216, PETRI_TRANSITIONS=166} [2024-06-27 18:06:22,624 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 181 predicate places. [2024-06-27 18:06:22,625 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 166 transitions, 3148 flow [2024-06-27 18:06:22,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:06:22,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:06:22,625 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:06:22,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 18:06:22,625 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:06:22,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:06:22,625 INFO L85 PathProgramCache]: Analyzing trace with hash 341799513, now seen corresponding path program 17 times [2024-06-27 18:06:22,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:06:22,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405961375] [2024-06-27 18:06:22,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:06:22,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:06:22,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:06:22,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:06:22,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:06:22,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405961375] [2024-06-27 18:06:22,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405961375] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:06:22,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:06:22,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:06:22,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039024259] [2024-06-27 18:06:22,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:06:22,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:06:22,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:06:22,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:06:22,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:06:22,864 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-27 18:06:22,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 166 transitions, 3148 flow. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:06:22,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:06:22,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-27 18:06:22,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:06:23,371 INFO L124 PetriNetUnfolderBase]: 1855/3113 cut-off events. [2024-06-27 18:06:23,372 INFO L125 PetriNetUnfolderBase]: For 125466/125472 co-relation queries the response was YES. [2024-06-27 18:06:23,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19756 conditions, 3113 events. 1855/3113 cut-off events. For 125466/125472 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 19316 event pairs, 369 based on Foata normal form. 9/3105 useless extension candidates. Maximal degree in co-relation 19634. Up to 1980 conditions per place. [2024-06-27 18:06:23,400 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 109 selfloop transitions, 91 changer transitions 0/207 dead transitions. [2024-06-27 18:06:23,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 207 transitions, 3831 flow [2024-06-27 18:06:23,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 18:06:23,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 18:06:23,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 187 transitions. [2024-06-27 18:06:23,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-27 18:06:23,401 INFO L175 Difference]: Start difference. First operand has 216 places, 166 transitions, 3148 flow. Second operand 11 states and 187 transitions. [2024-06-27 18:06:23,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 207 transitions, 3831 flow [2024-06-27 18:06:23,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 207 transitions, 3649 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-27 18:06:23,638 INFO L231 Difference]: Finished difference. Result has 218 places, 167 transitions, 3181 flow [2024-06-27 18:06:23,638 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2968, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3181, PETRI_PLACES=218, PETRI_TRANSITIONS=167} [2024-06-27 18:06:23,638 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 183 predicate places. [2024-06-27 18:06:23,639 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 167 transitions, 3181 flow [2024-06-27 18:06:23,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:06:23,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:06:23,639 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:06:23,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 18:06:23,639 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:06:23,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:06:23,640 INFO L85 PathProgramCache]: Analyzing trace with hash 334476693, now seen corresponding path program 18 times [2024-06-27 18:06:23,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:06:23,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262019772] [2024-06-27 18:06:23,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:06:23,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:06:23,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:06:23,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:06:23,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:06:23,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262019772] [2024-06-27 18:06:23,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262019772] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:06:23,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:06:23,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:06:23,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746082949] [2024-06-27 18:06:23,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:06:23,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:06:23,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:06:23,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:06:23,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:06:23,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-27 18:06:23,883 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 167 transitions, 3181 flow. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:06:23,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:06:23,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-27 18:06:23,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:06:24,457 INFO L124 PetriNetUnfolderBase]: 1909/3203 cut-off events. [2024-06-27 18:06:24,457 INFO L125 PetriNetUnfolderBase]: For 130317/130323 co-relation queries the response was YES. [2024-06-27 18:06:24,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20288 conditions, 3203 events. 1909/3203 cut-off events. For 130317/130323 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 20050 event pairs, 345 based on Foata normal form. 9/3195 useless extension candidates. Maximal degree in co-relation 20165. Up to 2053 conditions per place. [2024-06-27 18:06:24,483 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 104 selfloop transitions, 94 changer transitions 0/205 dead transitions. [2024-06-27 18:06:24,483 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 205 transitions, 3842 flow [2024-06-27 18:06:24,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 18:06:24,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 18:06:24,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 185 transitions. [2024-06-27 18:06:24,484 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4946524064171123 [2024-06-27 18:06:24,484 INFO L175 Difference]: Start difference. First operand has 218 places, 167 transitions, 3181 flow. Second operand 11 states and 185 transitions. [2024-06-27 18:06:24,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 205 transitions, 3842 flow [2024-06-27 18:06:24,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 205 transitions, 3658 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-27 18:06:24,702 INFO L231 Difference]: Finished difference. Result has 220 places, 168 transitions, 3218 flow [2024-06-27 18:06:24,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2999, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3218, PETRI_PLACES=220, PETRI_TRANSITIONS=168} [2024-06-27 18:06:24,702 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 185 predicate places. [2024-06-27 18:06:24,702 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 168 transitions, 3218 flow [2024-06-27 18:06:24,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:06:24,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:06:24,703 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:06:24,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 18:06:24,703 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:06:24,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:06:24,703 INFO L85 PathProgramCache]: Analyzing trace with hash 591150183, now seen corresponding path program 19 times [2024-06-27 18:06:24,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:06:24,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367664769] [2024-06-27 18:06:24,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:06:24,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:06:24,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:06:24,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:06:24,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:06:24,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367664769] [2024-06-27 18:06:24,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367664769] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:06:24,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:06:24,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:06:24,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937142575] [2024-06-27 18:06:24,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:06:24,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:06:24,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:06:24,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:06:24,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:06:24,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-27 18:06:24,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 168 transitions, 3218 flow. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:06:24,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:06:24,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-27 18:06:24,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:06:25,451 INFO L124 PetriNetUnfolderBase]: 1963/3296 cut-off events. [2024-06-27 18:06:25,451 INFO L125 PetriNetUnfolderBase]: For 133921/133927 co-relation queries the response was YES. [2024-06-27 18:06:25,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20829 conditions, 3296 events. 1963/3296 cut-off events. For 133921/133927 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 20782 event pairs, 381 based on Foata normal form. 9/3288 useless extension candidates. Maximal degree in co-relation 20705. Up to 2124 conditions per place. [2024-06-27 18:06:25,481 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 107 selfloop transitions, 93 changer transitions 0/207 dead transitions. [2024-06-27 18:06:25,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 207 transitions, 3897 flow [2024-06-27 18:06:25,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 18:06:25,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 18:06:25,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 182 transitions. [2024-06-27 18:06:25,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48663101604278075 [2024-06-27 18:06:25,482 INFO L175 Difference]: Start difference. First operand has 220 places, 168 transitions, 3218 flow. Second operand 11 states and 182 transitions. [2024-06-27 18:06:25,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 207 transitions, 3897 flow [2024-06-27 18:06:25,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 207 transitions, 3707 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-27 18:06:25,776 INFO L231 Difference]: Finished difference. Result has 222 places, 169 transitions, 3247 flow [2024-06-27 18:06:25,776 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=3030, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3247, PETRI_PLACES=222, PETRI_TRANSITIONS=169} [2024-06-27 18:06:25,776 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 187 predicate places. [2024-06-27 18:06:25,777 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 169 transitions, 3247 flow [2024-06-27 18:06:25,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:06:25,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:06:25,777 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:06:25,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 18:06:25,777 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:06:25,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:06:25,777 INFO L85 PathProgramCache]: Analyzing trace with hash 334472043, now seen corresponding path program 20 times [2024-06-27 18:06:25,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:06:25,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242664845] [2024-06-27 18:06:25,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:06:25,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:06:25,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:06:25,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:06:25,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:06:25,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242664845] [2024-06-27 18:06:25,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242664845] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:06:25,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:06:25,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:06:25,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529712716] [2024-06-27 18:06:25,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:06:25,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:06:25,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:06:25,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:06:25,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:06:26,059 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-27 18:06:26,059 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 169 transitions, 3247 flow. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:06:26,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:06:26,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-27 18:06:26,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:06:26,577 INFO L124 PetriNetUnfolderBase]: 1945/3266 cut-off events. [2024-06-27 18:06:26,578 INFO L125 PetriNetUnfolderBase]: For 123664/123670 co-relation queries the response was YES. [2024-06-27 18:06:26,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20239 conditions, 3266 events. 1945/3266 cut-off events. For 123664/123670 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 20578 event pairs, 357 based on Foata normal form. 9/3258 useless extension candidates. Maximal degree in co-relation 20114. Up to 2098 conditions per place. [2024-06-27 18:06:26,607 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 103 selfloop transitions, 95 changer transitions 0/205 dead transitions. [2024-06-27 18:06:26,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 205 transitions, 3821 flow [2024-06-27 18:06:26,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 18:06:26,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 18:06:26,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 184 transitions. [2024-06-27 18:06:26,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4919786096256685 [2024-06-27 18:06:26,608 INFO L175 Difference]: Start difference. First operand has 222 places, 169 transitions, 3247 flow. Second operand 11 states and 184 transitions. [2024-06-27 18:06:26,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 205 transitions, 3821 flow [2024-06-27 18:06:26,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 205 transitions, 3540 flow, removed 0 selfloop flow, removed 40 redundant places. [2024-06-27 18:06:26,811 INFO L231 Difference]: Finished difference. Result has 191 places, 168 transitions, 3054 flow [2024-06-27 18:06:26,811 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2864, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3054, PETRI_PLACES=191, PETRI_TRANSITIONS=168} [2024-06-27 18:06:26,811 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 156 predicate places. [2024-06-27 18:06:26,811 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 168 transitions, 3054 flow [2024-06-27 18:06:26,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:06:26,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:06:26,812 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:06:26,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 18:06:26,812 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:06:26,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:06:26,812 INFO L85 PathProgramCache]: Analyzing trace with hash -2008323973, now seen corresponding path program 2 times [2024-06-27 18:06:26,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:06:26,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609601173] [2024-06-27 18:06:26,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:06:26,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:06:26,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:06:26,875 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:06:26,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:06:26,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609601173] [2024-06-27 18:06:26,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609601173] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:06:26,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722316818] [2024-06-27 18:06:26,876 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 18:06:26,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:06:26,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:06:26,877 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 18:06:26,878 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-06-27 18:06:26,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 18:06:26,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 18:06:26,951 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 6 conjunts are in the unsatisfiable core [2024-06-27 18:06:26,953 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:06:26,963 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:06:26,963 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:06:26,999 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:06:26,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722316818] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:06:26,999 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:06:27,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-06-27 18:06:27,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777077180] [2024-06-27 18:06:27,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:06:27,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 18:06:27,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:06:27,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 18:06:27,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-06-27 18:06:27,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 34 [2024-06-27 18:06:27,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 168 transitions, 3054 flow. Second operand has 13 states, 13 states have (on average 16.692307692307693) internal successors, (217), 13 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:06:27,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:06:27,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 34 [2024-06-27 18:06:27,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:06:27,370 INFO L124 PetriNetUnfolderBase]: 1540/2812 cut-off events. [2024-06-27 18:06:27,370 INFO L125 PetriNetUnfolderBase]: For 100168/100460 co-relation queries the response was YES. [2024-06-27 18:06:27,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17938 conditions, 2812 events. 1540/2812 cut-off events. For 100168/100460 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 18333 event pairs, 638 based on Foata normal form. 105/2775 useless extension candidates. Maximal degree in co-relation 17846. Up to 1416 conditions per place. [2024-06-27 18:06:27,396 INFO L140 encePairwiseOnDemand]: 31/34 looper letters, 122 selfloop transitions, 79 changer transitions 0/232 dead transitions. [2024-06-27 18:06:27,396 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 232 transitions, 4276 flow [2024-06-27 18:06:27,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 18:06:27,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 18:06:27,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 273 transitions. [2024-06-27 18:06:27,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6691176470588235 [2024-06-27 18:06:27,402 INFO L175 Difference]: Start difference. First operand has 191 places, 168 transitions, 3054 flow. Second operand 12 states and 273 transitions. [2024-06-27 18:06:27,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 232 transitions, 4276 flow [2024-06-27 18:06:27,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 232 transitions, 3259 flow, removed 0 selfloop flow, removed 22 redundant places. [2024-06-27 18:06:27,589 INFO L231 Difference]: Finished difference. Result has 186 places, 174 transitions, 2257 flow [2024-06-27 18:06:27,589 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2037, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2257, PETRI_PLACES=186, PETRI_TRANSITIONS=174} [2024-06-27 18:06:27,590 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 151 predicate places. [2024-06-27 18:06:27,590 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 174 transitions, 2257 flow [2024-06-27 18:06:27,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 16.692307692307693) internal successors, (217), 13 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:06:27,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:06:27,596 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:06:27,610 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-06-27 18:06:27,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2024-06-27 18:06:27,808 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:06:27,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:06:27,808 INFO L85 PathProgramCache]: Analyzing trace with hash -198724229, now seen corresponding path program 3 times [2024-06-27 18:06:27,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:06:27,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802511355] [2024-06-27 18:06:27,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:06:27,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:06:27,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:06:27,917 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:06:27,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:06:27,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802511355] [2024-06-27 18:06:27,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802511355] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:06:27,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610109410] [2024-06-27 18:06:27,918 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 18:06:27,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:06:27,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:06:27,919 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 18:06:27,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-06-27 18:06:27,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-06-27 18:06:27,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 18:06:27,980 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 12 conjunts are in the unsatisfiable core [2024-06-27 18:06:27,981 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:06:28,003 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:06:28,004 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:06:28,176 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:06:28,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610109410] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:06:28,176 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:06:28,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2024-06-27 18:06:28,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140679039] [2024-06-27 18:06:28,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:06:28,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-06-27 18:06:28,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:06:28,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-06-27 18:06:28,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2024-06-27 18:06:28,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 34 [2024-06-27 18:06:28,213 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 174 transitions, 2257 flow. Second operand has 25 states, 25 states have (on average 16.36) internal successors, (409), 25 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:06:28,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:06:28,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 34 [2024-06-27 18:06:28,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:06:28,666 INFO L124 PetriNetUnfolderBase]: 1828/3280 cut-off events. [2024-06-27 18:06:28,666 INFO L125 PetriNetUnfolderBase]: For 92875/93179 co-relation queries the response was YES. [2024-06-27 18:06:28,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20654 conditions, 3280 events. 1828/3280 cut-off events. For 92875/93179 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 19855 event pairs, 638 based on Foata normal form. 195/3321 useless extension candidates. Maximal degree in co-relation 20571. Up to 1416 conditions per place. [2024-06-27 18:06:28,693 INFO L140 encePairwiseOnDemand]: 31/34 looper letters, 194 selfloop transitions, 91 changer transitions 0/316 dead transitions. [2024-06-27 18:06:28,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 316 transitions, 4667 flow [2024-06-27 18:06:28,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-06-27 18:06:28,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-06-27 18:06:28,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 543 transitions. [2024-06-27 18:06:28,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6654411764705882 [2024-06-27 18:06:28,697 INFO L175 Difference]: Start difference. First operand has 186 places, 174 transitions, 2257 flow. Second operand 24 states and 543 transitions. [2024-06-27 18:06:28,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 316 transitions, 4667 flow [2024-06-27 18:06:28,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 316 transitions, 4434 flow, removed 25 selfloop flow, removed 13 redundant places. [2024-06-27 18:06:28,903 INFO L231 Difference]: Finished difference. Result has 208 places, 186 transitions, 2352 flow [2024-06-27 18:06:28,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2048, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=2352, PETRI_PLACES=208, PETRI_TRANSITIONS=186} [2024-06-27 18:06:28,903 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 173 predicate places. [2024-06-27 18:06:28,904 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 186 transitions, 2352 flow [2024-06-27 18:06:28,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 16.36) internal successors, (409), 25 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:06:28,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:06:28,904 INFO L208 CegarLoopForPetriNet]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:06:28,918 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-06-27 18:06:29,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:06:29,115 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:06:29,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:06:29,116 INFO L85 PathProgramCache]: Analyzing trace with hash 900140923, now seen corresponding path program 4 times [2024-06-27 18:06:29,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:06:29,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863245689] [2024-06-27 18:06:29,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:06:29,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:06:29,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:06:30,097 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:06:30,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:06:30,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863245689] [2024-06-27 18:06:30,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863245689] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:06:30,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038044142] [2024-06-27 18:06:30,098 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 18:06:30,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:06:30,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:06:30,099 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 18:06:30,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-06-27 18:06:30,172 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 18:06:30,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 18:06:30,175 INFO L262 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 77 conjunts are in the unsatisfiable core [2024-06-27 18:06:30,178 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:06:31,361 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 210 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:06:31,361 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:06:32,737 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:06:32,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038044142] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:06:32,738 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:06:32,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 84 [2024-06-27 18:06:32,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535268083] [2024-06-27 18:06:32,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:06:32,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2024-06-27 18:06:32,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:06:32,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2024-06-27 18:06:32,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1036, Invalid=6104, Unknown=0, NotChecked=0, Total=7140 [2024-06-27 18:06:34,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-06-27 18:06:34,306 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 186 transitions, 2352 flow. Second operand has 85 states, 85 states have (on average 9.270588235294118) internal successors, (788), 85 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:06:34,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:06:34,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-06-27 18:06:34,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:07:21,673 INFO L124 PetriNetUnfolderBase]: 50059/82372 cut-off events. [2024-06-27 18:07:21,673 INFO L125 PetriNetUnfolderBase]: For 1564670/1564675 co-relation queries the response was YES. [2024-06-27 18:07:22,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 482489 conditions, 82372 events. 50059/82372 cut-off events. For 1564670/1564675 co-relation queries the response was YES. Maximal size of possible extension queue 1118. Compared 615397 event pairs, 483 based on Foata normal form. 0/81877 useless extension candidates. Maximal degree in co-relation 482392. Up to 24160 conditions per place. [2024-06-27 18:07:22,871 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 1167 selfloop transitions, 1996 changer transitions 1053/4220 dead transitions. [2024-06-27 18:07:22,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 4220 transitions, 55411 flow [2024-06-27 18:07:22,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 263 states. [2024-06-27 18:07:22,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 263 states. [2024-06-27 18:07:22,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 4342 transitions. [2024-06-27 18:07:22,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48557369715947213 [2024-06-27 18:07:22,876 INFO L175 Difference]: Start difference. First operand has 208 places, 186 transitions, 2352 flow. Second operand 263 states and 4342 transitions. [2024-06-27 18:07:22,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 4220 transitions, 55411 flow [2024-06-27 18:07:26,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 4220 transitions, 50662 flow, removed 1250 selfloop flow, removed 12 redundant places. [2024-06-27 18:07:26,709 INFO L231 Difference]: Finished difference. Result has 560 places, 2182 transitions, 25770 flow [2024-06-27 18:07:26,710 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2141, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=263, PETRI_FLOW=25770, PETRI_PLACES=560, PETRI_TRANSITIONS=2182} [2024-06-27 18:07:26,710 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 525 predicate places. [2024-06-27 18:07:26,710 INFO L495 AbstractCegarLoop]: Abstraction has has 560 places, 2182 transitions, 25770 flow [2024-06-27 18:07:26,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 9.270588235294118) internal successors, (788), 85 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:07:26,711 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:07:26,711 INFO L208 CegarLoopForPetriNet]: trace histogram [22, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:07:26,725 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-06-27 18:07:26,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:07:26,912 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:07:26,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:07:26,912 INFO L85 PathProgramCache]: Analyzing trace with hash 196874095, now seen corresponding path program 1 times [2024-06-27 18:07:26,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:07:26,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259046632] [2024-06-27 18:07:26,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:07:26,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:07:26,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:07:27,997 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 255 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:07:27,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:07:27,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259046632] [2024-06-27 18:07:27,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259046632] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:07:27,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514555481] [2024-06-27 18:07:27,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:07:27,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:07:27,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:07:27,999 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 18:07:28,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-06-27 18:07:28,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:07:28,096 INFO L262 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 79 conjunts are in the unsatisfiable core [2024-06-27 18:07:28,100 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:07:29,375 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 210 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:07:29,376 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:07:30,896 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 255 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:07:30,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514555481] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:07:30,897 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:07:30,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 91 [2024-06-27 18:07:30,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598283160] [2024-06-27 18:07:30,897 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:07:30,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2024-06-27 18:07:30,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:07:30,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2024-06-27 18:07:30,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1074, Invalid=7298, Unknown=0, NotChecked=0, Total=8372 [2024-06-27 18:07:32,456 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-06-27 18:07:32,457 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 560 places, 2182 transitions, 25770 flow. Second operand has 92 states, 92 states have (on average 9.304347826086957) internal successors, (856), 92 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:07:32,457 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:07:32,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-06-27 18:07:32,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand