./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.2024-05-07_14-17-48.files/mutex-meet/fib_unsafe-10.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b44c8288 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.2024-05-07_14-17-48.files/mutex-meet/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-wip.fs.witness-ghost-b44c828-m [2024-05-12 11:06:25,261 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-05-12 11:06:25,333 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-05-12 11:06:25,336 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-05-12 11:06:25,336 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-05-12 11:06:25,350 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-05-12 11:06:25,350 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-05-12 11:06:25,351 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-05-12 11:06:25,351 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-05-12 11:06:25,351 INFO L153 SettingsManager]: * Use memory slicer=true [2024-05-12 11:06:25,352 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-05-12 11:06:25,352 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-05-12 11:06:25,353 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-05-12 11:06:25,353 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-05-12 11:06:25,353 INFO L153 SettingsManager]: * Use SBE=true [2024-05-12 11:06:25,353 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-05-12 11:06:25,354 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-05-12 11:06:25,354 INFO L153 SettingsManager]: * sizeof long=4 [2024-05-12 11:06:25,354 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-05-12 11:06:25,355 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-05-12 11:06:25,355 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-05-12 11:06:25,355 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-05-12 11:06:25,356 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-05-12 11:06:25,356 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-05-12 11:06:25,356 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-05-12 11:06:25,356 INFO L153 SettingsManager]: * sizeof long double=12 [2024-05-12 11:06:25,357 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-05-12 11:06:25,357 INFO L153 SettingsManager]: * Use constant arrays=true [2024-05-12 11:06:25,357 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-05-12 11:06:25,357 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-05-12 11:06:25,358 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-05-12 11:06:25,358 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-05-12 11:06:25,358 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-05-12 11:06:25,358 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-05-12 11:06:25,358 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-05-12 11:06:25,359 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-05-12 11:06:25,359 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-05-12 11:06:25,359 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-05-12 11:06:25,359 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-05-12 11:06:25,360 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-05-12 11:06:25,360 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-05-12 11:06:25,360 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-05-12 11:06:25,360 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-05-12 11:06:25,360 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-05-12 11:06:25,546 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-05-12 11:06:25,566 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-05-12 11:06:25,568 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-05-12 11:06:25,569 INFO L270 PluginConnector]: Initializing CDTParser... [2024-05-12 11:06:25,570 INFO L274 PluginConnector]: CDTParser initialized [2024-05-12 11:06:25,570 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_unsafe-10.i [2024-05-12 11:06:26,637 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-05-12 11:06:26,931 INFO L384 CDTParser]: Found 1 translation units. [2024-05-12 11:06:26,931 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_unsafe-10.i [2024-05-12 11:06:26,945 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1d37162ef/f65fc258963d4e9eb29cc5afc3618cdd/FLAG681416414 [2024-05-12 11:06:26,956 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1d37162ef/f65fc258963d4e9eb29cc5afc3618cdd [2024-05-12 11:06:26,959 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-05-12 11:06:26,960 INFO L274 PluginConnector]: Witness Parser initialized [2024-05-12 11:06:26,960 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-07_14-17-48.files/mutex-meet/fib_unsafe-10.yml/witness.yml [2024-05-12 11:06:27,085 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-05-12 11:06:27,086 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-05-12 11:06:27,087 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-05-12 11:06:27,087 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-05-12 11:06:27,090 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-05-12 11:06:27,091 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.05 11:06:26" (1/2) ... [2024-05-12 11:06:27,091 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62422eaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 11:06:27, skipping insertion in model container [2024-05-12 11:06:27,092 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.05 11:06:26" (1/2) ... [2024-05-12 11:06:27,093 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@585c969a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 11:06:27, skipping insertion in model container [2024-05-12 11:06:27,093 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 11:06:27" (2/2) ... [2024-05-12 11:06:27,093 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62422eaf and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 11:06:27, skipping insertion in model container [2024-05-12 11:06:27,094 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 11:06:27" (2/2) ... [2024-05-12 11:06:27,094 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-05-12 11:06:27,130 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-05-12 11:06:27,130 INFO L97 edCorrectnessWitness]: Location invariant before [L721-L721] ((((((((! multithreaded || 0 <= cur) && (! multithreaded || 0 <= next)) && (! multithreaded || ((0 <= i && 1 <= i) && i != 0))) && (! multithreaded || 0 <= p)) && (! multithreaded || 0 <= q)) && (! multithreaded || ((((0 <= i && 0 <= j) && 1 <= j) && i != 0) && j != 0))) && (! multithreaded || 0 <= x)) && (! multithreaded || 0 <= prev)) && (! multithreaded || ((0 <= j && 1 <= j) && j != 0)) [2024-05-12 11:06:27,130 INFO L97 edCorrectnessWitness]: Location invariant before [L722-L722] ((((((((! multithreaded || 0 <= cur) && (! multithreaded || 0 <= next)) && (! multithreaded || ((0 <= i && 1 <= i) && i != 0))) && (! multithreaded || 0 <= p)) && (! multithreaded || 0 <= q)) && (! multithreaded || ((((0 <= i && 0 <= j) && 1 <= j) && i != 0) && j != 0))) && (! multithreaded || 0 <= x)) && (! multithreaded || 0 <= prev)) && (! multithreaded || ((0 <= j && 1 <= j) && j != 0)) [2024-05-12 11:06:27,130 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-05-12 11:06:27,131 INFO L106 edCorrectnessWitness]: ghost_update [L720-L720] multithreaded = 1; [2024-05-12 11:06:27,162 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-05-12 11:06:27,453 WARN L246 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] [2024-05-12 11:06:27,478 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-05-12 11:06:27,484 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local [2024-05-12 11:06:27,551 WARN L246 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 [2024-05-12 11:06:27,582 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-05-12 11:06:27,615 INFO L206 MainTranslator]: Completed translation [2024-05-12 11:06:27,616 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 11:06:27 WrapperNode [2024-05-12 11:06:27,616 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-05-12 11:06:27,617 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-05-12 11:06:27,617 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-05-12 11:06:27,617 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-05-12 11:06:27,622 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 12.05 11:06:27" (1/1) ... [2024-05-12 11:06:27,649 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 12.05 11:06:27" (1/1) ... [2024-05-12 11:06:27,668 INFO L138 Inliner]: procedures = 165, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 79 [2024-05-12 11:06:27,668 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-05-12 11:06:27,670 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-05-12 11:06:27,670 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-05-12 11:06:27,670 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-05-12 11:06:27,678 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 11:06:27" (1/1) ... [2024-05-12 11:06:27,678 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 11:06:27" (1/1) ... [2024-05-12 11:06:27,680 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 11:06:27" (1/1) ... [2024-05-12 11:06:27,691 INFO L175 MemorySlicer]: Split 4 memory accesses to 3 slices as follows [2, 1, 1]. 50 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 1, 1]. [2024-05-12 11:06:27,691 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 11:06:27" (1/1) ... [2024-05-12 11:06:27,691 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 11:06:27" (1/1) ... [2024-05-12 11:06:27,702 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 11:06:27" (1/1) ... [2024-05-12 11:06:27,704 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 11:06:27" (1/1) ... [2024-05-12 11:06:27,706 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 11:06:27" (1/1) ... [2024-05-12 11:06:27,707 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 11:06:27" (1/1) ... [2024-05-12 11:06:27,709 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-05-12 11:06:27,710 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-05-12 11:06:27,710 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-05-12 11:06:27,710 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-05-12 11:06:27,710 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 11:06:27" (1/1) ... [2024-05-12 11:06:27,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-05-12 11:06:27,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 11:06:27,741 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) [2024-05-12 11:06:27,743 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 [2024-05-12 11:06:27,767 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2024-05-12 11:06:27,779 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2024-05-12 11:06:27,780 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2024-05-12 11:06:27,780 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2024-05-12 11:06:27,780 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-05-12 11:06:27,780 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-05-12 11:06:27,780 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-05-12 11:06:27,780 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-05-12 11:06:27,780 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-05-12 11:06:27,780 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-05-12 11:06:27,781 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-05-12 11:06:27,781 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-05-12 11:06:27,781 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-05-12 11:06:27,781 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-05-12 11:06:27,782 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-05-12 11:06:27,782 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-05-12 11:06:27,782 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-05-12 11:06:27,783 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-05-12 11:06:27,895 INFO L244 CfgBuilder]: Building ICFG [2024-05-12 11:06:27,896 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-05-12 11:06:28,076 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-05-12 11:06:28,077 INFO L293 CfgBuilder]: Performing block encoding [2024-05-12 11:06:28,201 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-05-12 11:06:28,201 INFO L320 CfgBuilder]: Removed 3 assume(true) statements. [2024-05-12 11:06:28,203 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.05 11:06:28 BoogieIcfgContainer [2024-05-12 11:06:28,203 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-05-12 11:06:28,205 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-05-12 11:06:28,205 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-05-12 11:06:28,208 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-05-12 11:06:28,208 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.05 11:06:26" (1/4) ... [2024-05-12 11:06:28,208 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fae19c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.05 11:06:28, skipping insertion in model container [2024-05-12 11:06:28,224 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 11:06:27" (2/4) ... [2024-05-12 11:06:28,224 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fae19c0 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 12.05 11:06:28, skipping insertion in model container [2024-05-12 11:06:28,225 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 11:06:27" (3/4) ... [2024-05-12 11:06:28,225 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fae19c0 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 12.05 11:06:28, skipping insertion in model container [2024-05-12 11:06:28,225 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.05 11:06:28" (4/4) ... [2024-05-12 11:06:28,226 INFO L112 eAbstractionObserver]: Analyzing ICFG fib_unsafe-10.i [2024-05-12 11:06:28,239 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-05-12 11:06:28,244 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-05-12 11:06:28,244 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-05-12 11:06:28,291 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-05-12 11:06:28,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 37 places, 34 transitions, 76 flow [2024-05-12 11:06:28,370 INFO L124 PetriNetUnfolderBase]: 4/32 cut-off events. [2024-05-12 11:06:28,370 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-05-12 11:06:28,373 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. [2024-05-12 11:06:28,373 INFO L82 GeneralOperation]: Start removeDead. Operand has 37 places, 34 transitions, 76 flow [2024-05-12 11:06:28,375 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 35 places, 32 transitions, 70 flow [2024-05-12 11:06:28,381 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-05-12 11:06:28,388 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;@6be64c5b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-05-12 11:06:28,388 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-05-12 11:06:28,392 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-05-12 11:06:28,392 INFO L124 PetriNetUnfolderBase]: 0/10 cut-off events. [2024-05-12 11:06:28,392 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-05-12 11:06:28,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:06:28,392 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:06:28,393 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)] === [2024-05-12 11:06:28,399 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:06:28,400 INFO L85 PathProgramCache]: Analyzing trace with hash -796992463, now seen corresponding path program 1 times [2024-05-12 11:06:28,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:06:28,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057352526] [2024-05-12 11:06:28,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:06:28,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:06:28,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:06:29,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:06:29,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:06:29,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057352526] [2024-05-12 11:06:29,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057352526] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 11:06:29,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 11:06:29,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 11:06:29,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856027631] [2024-05-12 11:06:29,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 11:06:29,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 11:06:29,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:06:29,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 11:06:29,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-05-12 11:06:29,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-05-12 11:06:29,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 32 transitions, 70 flow. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:06:29,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:06:29,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-05-12 11:06:29,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:06:29,233 INFO L124 PetriNetUnfolderBase]: 354/619 cut-off events. [2024-05-12 11:06:29,233 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-05-12 11:06:29,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1183 conditions, 619 events. 354/619 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2654 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. [2024-05-12 11:06:29,238 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 42 selfloop transitions, 11 changer transitions 1/60 dead transitions. [2024-05-12 11:06:29,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 60 transitions, 237 flow [2024-05-12 11:06:29,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 11:06:29,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 11:06:29,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 102 transitions. [2024-05-12 11:06:29,247 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-05-12 11:06:29,249 INFO L175 Difference]: Start difference. First operand has 35 places, 32 transitions, 70 flow. Second operand 5 states and 102 transitions. [2024-05-12 11:06:29,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 60 transitions, 237 flow [2024-05-12 11:06:29,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 60 transitions, 234 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-05-12 11:06:29,253 INFO L231 Difference]: Finished difference. Result has 40 places, 38 transitions, 142 flow [2024-05-12 11:06:29,254 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} [2024-05-12 11:06:29,257 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 5 predicate places. [2024-05-12 11:06:29,257 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 38 transitions, 142 flow [2024-05-12 11:06:29,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:06:29,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:06:29,257 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:06:29,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-05-12 11:06:29,257 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)] === [2024-05-12 11:06:29,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:06:29,258 INFO L85 PathProgramCache]: Analyzing trace with hash -607407073, now seen corresponding path program 1 times [2024-05-12 11:06:29,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:06:29,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135337548] [2024-05-12 11:06:29,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:06:29,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:06:29,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:06:29,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:06:29,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:06:29,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135337548] [2024-05-12 11:06:29,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135337548] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 11:06:29,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 11:06:29,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 11:06:29,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308309178] [2024-05-12 11:06:29,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 11:06:29,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 11:06:29,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:06:29,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 11:06:29,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-05-12 11:06:29,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-05-12 11:06:29,528 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 38 transitions, 142 flow. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:06:29,528 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:06:29,528 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-05-12 11:06:29,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:06:29,634 INFO L124 PetriNetUnfolderBase]: 322/569 cut-off events. [2024-05-12 11:06:29,635 INFO L125 PetriNetUnfolderBase]: For 236/236 co-relation queries the response was YES. [2024-05-12 11:06:29,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1490 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. [2024-05-12 11:06:29,638 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 52 selfloop transitions, 17 changer transitions 0/75 dead transitions. [2024-05-12 11:06:29,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 75 transitions, 382 flow [2024-05-12 11:06:29,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 11:06:29,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 11:06:29,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-05-12 11:06:29,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5378151260504201 [2024-05-12 11:06:29,640 INFO L175 Difference]: Start difference. First operand has 40 places, 38 transitions, 142 flow. Second operand 7 states and 128 transitions. [2024-05-12 11:06:29,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 75 transitions, 382 flow [2024-05-12 11:06:29,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 75 transitions, 382 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-05-12 11:06:29,643 INFO L231 Difference]: Finished difference. Result has 48 places, 44 transitions, 224 flow [2024-05-12 11:06:29,643 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} [2024-05-12 11:06:29,644 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 13 predicate places. [2024-05-12 11:06:29,644 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 44 transitions, 224 flow [2024-05-12 11:06:29,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:06:29,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:06:29,645 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:06:29,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-05-12 11:06:29,645 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)] === [2024-05-12 11:06:29,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:06:29,645 INFO L85 PathProgramCache]: Analyzing trace with hash -2120745009, now seen corresponding path program 1 times [2024-05-12 11:06:29,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:06:29,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732602190] [2024-05-12 11:06:29,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:06:29,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:06:29,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:06:29,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:06:29,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:06:29,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732602190] [2024-05-12 11:06:29,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732602190] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 11:06:29,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 11:06:29,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 11:06:29,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721307119] [2024-05-12 11:06:29,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 11:06:29,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 11:06:29,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:06:29,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 11:06:29,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-05-12 11:06:29,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-05-12 11:06:29,960 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 44 transitions, 224 flow. Second operand has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 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) [2024-05-12 11:06:29,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:06:29,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-05-12 11:06:29,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:06:30,101 INFO L124 PetriNetUnfolderBase]: 307/544 cut-off events. [2024-05-12 11:06:30,101 INFO L125 PetriNetUnfolderBase]: For 512/515 co-relation queries the response was YES. [2024-05-12 11:06:30,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1702 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 2313 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. [2024-05-12 11:06:30,104 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 55 selfloop transitions, 19 changer transitions 0/80 dead transitions. [2024-05-12 11:06:30,104 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 80 transitions, 483 flow [2024-05-12 11:06:30,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 11:06:30,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 11:06:30,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-05-12 11:06:30,106 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5147058823529411 [2024-05-12 11:06:30,106 INFO L175 Difference]: Start difference. First operand has 48 places, 44 transitions, 224 flow. Second operand 8 states and 140 transitions. [2024-05-12 11:06:30,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 80 transitions, 483 flow [2024-05-12 11:06:30,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 80 transitions, 451 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-05-12 11:06:30,109 INFO L231 Difference]: Finished difference. Result has 51 places, 45 transitions, 244 flow [2024-05-12 11:06:30,110 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} [2024-05-12 11:06:30,110 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 16 predicate places. [2024-05-12 11:06:30,110 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 45 transitions, 244 flow [2024-05-12 11:06:30,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 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) [2024-05-12 11:06:30,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:06:30,111 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:06:30,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-05-12 11:06:30,111 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)] === [2024-05-12 11:06:30,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:06:30,112 INFO L85 PathProgramCache]: Analyzing trace with hash -586531568, now seen corresponding path program 1 times [2024-05-12 11:06:30,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:06:30,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935312722] [2024-05-12 11:06:30,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:06:30,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:06:30,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:06:30,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:06:30,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:06:30,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935312722] [2024-05-12 11:06:30,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935312722] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 11:06:30,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 11:06:30,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 11:06:30,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778336470] [2024-05-12 11:06:30,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 11:06:30,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 11:06:30,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:06:30,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 11:06:30,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-05-12 11:06:30,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-05-12 11:06:30,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 45 transitions, 244 flow. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:06:30,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:06:30,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-05-12 11:06:30,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:06:30,494 INFO L124 PetriNetUnfolderBase]: 373/652 cut-off events. [2024-05-12 11:06:30,494 INFO L125 PetriNetUnfolderBase]: For 835/835 co-relation queries the response was YES. [2024-05-12 11:06:30,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2130 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 2866 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. [2024-05-12 11:06:30,497 INFO L140 encePairwiseOnDemand]: 24/34 looper letters, 52 selfloop transitions, 21 changer transitions 0/79 dead transitions. [2024-05-12 11:06:30,511 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 79 transitions, 540 flow [2024-05-12 11:06:30,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 11:06:30,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 11:06:30,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-05-12 11:06:30,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5126050420168067 [2024-05-12 11:06:30,513 INFO L175 Difference]: Start difference. First operand has 51 places, 45 transitions, 244 flow. Second operand 7 states and 122 transitions. [2024-05-12 11:06:30,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 79 transitions, 540 flow [2024-05-12 11:06:30,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 79 transitions, 496 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-05-12 11:06:30,516 INFO L231 Difference]: Finished difference. Result has 55 places, 52 transitions, 323 flow [2024-05-12 11:06:30,516 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} [2024-05-12 11:06:30,517 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 20 predicate places. [2024-05-12 11:06:30,517 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 52 transitions, 323 flow [2024-05-12 11:06:30,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:06:30,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:06:30,517 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:06:30,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-05-12 11:06:30,517 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)] === [2024-05-12 11:06:30,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:06:30,518 INFO L85 PathProgramCache]: Analyzing trace with hash -1584426839, now seen corresponding path program 1 times [2024-05-12 11:06:30,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:06:30,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583349327] [2024-05-12 11:06:30,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:06:30,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:06:30,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:06:30,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:06:30,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:06:30,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583349327] [2024-05-12 11:06:30,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583349327] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 11:06:30,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 11:06:30,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 11:06:30,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394668725] [2024-05-12 11:06:30,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 11:06:30,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 11:06:30,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:06:30,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 11:06:30,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-05-12 11:06:30,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-05-12 11:06:30,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 52 transitions, 323 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:06:30,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:06:30,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-05-12 11:06:30,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:06:30,947 INFO L124 PetriNetUnfolderBase]: 355/621 cut-off events. [2024-05-12 11:06:30,947 INFO L125 PetriNetUnfolderBase]: For 1110/1110 co-relation queries the response was YES. [2024-05-12 11:06:30,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2209 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 2697 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. [2024-05-12 11:06:30,952 INFO L140 encePairwiseOnDemand]: 25/34 looper letters, 51 selfloop transitions, 21 changer transitions 0/78 dead transitions. [2024-05-12 11:06:30,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 78 transitions, 569 flow [2024-05-12 11:06:30,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 11:06:30,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 11:06:30,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-05-12 11:06:30,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46691176470588236 [2024-05-12 11:06:30,956 INFO L175 Difference]: Start difference. First operand has 55 places, 52 transitions, 323 flow. Second operand 8 states and 127 transitions. [2024-05-12 11:06:30,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 78 transitions, 569 flow [2024-05-12 11:06:30,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 78 transitions, 562 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-05-12 11:06:30,964 INFO L231 Difference]: Finished difference. Result has 62 places, 52 transitions, 363 flow [2024-05-12 11:06:30,965 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} [2024-05-12 11:06:30,966 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 27 predicate places. [2024-05-12 11:06:30,967 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 52 transitions, 363 flow [2024-05-12 11:06:30,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:06:30,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:06:30,967 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:06:30,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-05-12 11:06:30,967 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)] === [2024-05-12 11:06:30,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:06:30,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1016755256, now seen corresponding path program 1 times [2024-05-12 11:06:30,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:06:30,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801902848] [2024-05-12 11:06:30,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:06:30,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:06:30,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:06:31,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:06:31,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:06:31,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801902848] [2024-05-12 11:06:31,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801902848] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 11:06:31,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 11:06:31,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 11:06:31,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882558998] [2024-05-12 11:06:31,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 11:06:31,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 11:06:31,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:06:31,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 11:06:31,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-05-12 11:06:31,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-05-12 11:06:31,234 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 52 transitions, 363 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:06:31,234 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:06:31,234 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-05-12 11:06:31,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:06:31,376 INFO L124 PetriNetUnfolderBase]: 367/640 cut-off events. [2024-05-12 11:06:31,376 INFO L125 PetriNetUnfolderBase]: For 1371/1376 co-relation queries the response was YES. [2024-05-12 11:06:31,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2384 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 2777 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. [2024-05-12 11:06:31,380 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 58 selfloop transitions, 29 changer transitions 0/93 dead transitions. [2024-05-12 11:06:31,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 93 transitions, 701 flow [2024-05-12 11:06:31,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 11:06:31,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 11:06:31,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-05-12 11:06:31,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49019607843137253 [2024-05-12 11:06:31,382 INFO L175 Difference]: Start difference. First operand has 62 places, 52 transitions, 363 flow. Second operand 9 states and 150 transitions. [2024-05-12 11:06:31,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 93 transitions, 701 flow [2024-05-12 11:06:31,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 93 transitions, 649 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-05-12 11:06:31,387 INFO L231 Difference]: Finished difference. Result has 65 places, 59 transitions, 434 flow [2024-05-12 11:06:31,387 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} [2024-05-12 11:06:31,389 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 30 predicate places. [2024-05-12 11:06:31,389 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 59 transitions, 434 flow [2024-05-12 11:06:31,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:06:31,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:06:31,390 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:06:31,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-05-12 11:06:31,390 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)] === [2024-05-12 11:06:31,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:06:31,390 INFO L85 PathProgramCache]: Analyzing trace with hash 1905564268, now seen corresponding path program 2 times [2024-05-12 11:06:31,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:06:31,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157770125] [2024-05-12 11:06:31,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:06:31,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:06:31,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:06:31,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:06:31,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:06:31,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157770125] [2024-05-12 11:06:31,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157770125] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 11:06:31,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 11:06:31,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 11:06:31,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489601661] [2024-05-12 11:06:31,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 11:06:31,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 11:06:31,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:06:31,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 11:06:31,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-05-12 11:06:31,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-05-12 11:06:31,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 59 transitions, 434 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:06:31,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:06:31,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-05-12 11:06:31,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:06:31,792 INFO L124 PetriNetUnfolderBase]: 385/670 cut-off events. [2024-05-12 11:06:31,792 INFO L125 PetriNetUnfolderBase]: For 1626/1626 co-relation queries the response was YES. [2024-05-12 11:06:31,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2644 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 2942 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. [2024-05-12 11:06:31,796 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 58 selfloop transitions, 32 changer transitions 0/96 dead transitions. [2024-05-12 11:06:31,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 96 transitions, 809 flow [2024-05-12 11:06:31,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 11:06:31,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 11:06:31,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-05-12 11:06:31,798 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47058823529411764 [2024-05-12 11:06:31,798 INFO L175 Difference]: Start difference. First operand has 65 places, 59 transitions, 434 flow. Second operand 9 states and 144 transitions. [2024-05-12 11:06:31,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 96 transitions, 809 flow [2024-05-12 11:06:31,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 96 transitions, 738 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-05-12 11:06:31,803 INFO L231 Difference]: Finished difference. Result has 70 places, 69 transitions, 549 flow [2024-05-12 11:06:31,803 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} [2024-05-12 11:06:31,804 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 35 predicate places. [2024-05-12 11:06:31,804 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 69 transitions, 549 flow [2024-05-12 11:06:31,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:06:31,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:06:31,805 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:06:31,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-05-12 11:06:31,805 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)] === [2024-05-12 11:06:31,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:06:31,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1133920376, now seen corresponding path program 3 times [2024-05-12 11:06:31,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:06:31,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132134424] [2024-05-12 11:06:31,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:06:31,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:06:31,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:06:32,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:06:32,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:06:32,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132134424] [2024-05-12 11:06:32,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132134424] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 11:06:32,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 11:06:32,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 11:06:32,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981466266] [2024-05-12 11:06:32,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 11:06:32,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 11:06:32,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:06:32,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 11:06:32,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-05-12 11:06:32,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-05-12 11:06:32,051 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 69 transitions, 549 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:06:32,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:06:32,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-05-12 11:06:32,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:06:32,186 INFO L124 PetriNetUnfolderBase]: 397/688 cut-off events. [2024-05-12 11:06:32,186 INFO L125 PetriNetUnfolderBase]: For 1934/1944 co-relation queries the response was YES. [2024-05-12 11:06:32,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2884 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. [2024-05-12 11:06:32,191 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 64 selfloop transitions, 36 changer transitions 0/106 dead transitions. [2024-05-12 11:06:32,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 106 transitions, 924 flow [2024-05-12 11:06:32,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 11:06:32,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 11:06:32,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-05-12 11:06:32,192 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.477124183006536 [2024-05-12 11:06:32,192 INFO L175 Difference]: Start difference. First operand has 70 places, 69 transitions, 549 flow. Second operand 9 states and 146 transitions. [2024-05-12 11:06:32,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 106 transitions, 924 flow [2024-05-12 11:06:32,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 106 transitions, 884 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-05-12 11:06:32,198 INFO L231 Difference]: Finished difference. Result has 78 places, 76 transitions, 670 flow [2024-05-12 11:06:32,198 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} [2024-05-12 11:06:32,199 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 43 predicate places. [2024-05-12 11:06:32,199 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 76 transitions, 670 flow [2024-05-12 11:06:32,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:06:32,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:06:32,199 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:06:32,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-05-12 11:06:32,200 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)] === [2024-05-12 11:06:32,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:06:32,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1906158914, now seen corresponding path program 4 times [2024-05-12 11:06:32,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:06:32,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49971267] [2024-05-12 11:06:32,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:06:32,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:06:32,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:06:32,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:06:32,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:06:32,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49971267] [2024-05-12 11:06:32,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49971267] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 11:06:32,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 11:06:32,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 11:06:32,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544983932] [2024-05-12 11:06:32,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 11:06:32,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 11:06:32,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:06:32,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 11:06:32,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-05-12 11:06:32,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-05-12 11:06:32,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 76 transitions, 670 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:06:32,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:06:32,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-05-12 11:06:32,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:06:32,595 INFO L124 PetriNetUnfolderBase]: 409/709 cut-off events. [2024-05-12 11:06:32,595 INFO L125 PetriNetUnfolderBase]: For 2414/2414 co-relation queries the response was YES. [2024-05-12 11:06:32,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3150 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 3147 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. [2024-05-12 11:06:32,600 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 68 selfloop transitions, 38 changer transitions 0/112 dead transitions. [2024-05-12 11:06:32,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 112 transitions, 1064 flow [2024-05-12 11:06:32,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 11:06:32,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 11:06:32,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-05-12 11:06:32,601 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4803921568627451 [2024-05-12 11:06:32,601 INFO L175 Difference]: Start difference. First operand has 78 places, 76 transitions, 670 flow. Second operand 9 states and 147 transitions. [2024-05-12 11:06:32,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 112 transitions, 1064 flow [2024-05-12 11:06:32,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 112 transitions, 1005 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-05-12 11:06:32,608 INFO L231 Difference]: Finished difference. Result has 84 places, 82 transitions, 771 flow [2024-05-12 11:06:32,609 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} [2024-05-12 11:06:32,609 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 49 predicate places. [2024-05-12 11:06:32,609 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 82 transitions, 771 flow [2024-05-12 11:06:32,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:06:32,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:06:32,610 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:06:32,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-05-12 11:06:32,610 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)] === [2024-05-12 11:06:32,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:06:32,610 INFO L85 PathProgramCache]: Analyzing trace with hash 2071591588, now seen corresponding path program 5 times [2024-05-12 11:06:32,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:06:32,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208493823] [2024-05-12 11:06:32,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:06:32,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:06:32,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:06:32,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:06:32,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:06:32,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208493823] [2024-05-12 11:06:32,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208493823] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 11:06:32,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 11:06:32,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 11:06:32,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558440010] [2024-05-12 11:06:32,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 11:06:32,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 11:06:32,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:06:32,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 11:06:32,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-05-12 11:06:32,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-05-12 11:06:32,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 82 transitions, 771 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:06:32,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:06:32,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-05-12 11:06:32,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:06:32,978 INFO L124 PetriNetUnfolderBase]: 415/714 cut-off events. [2024-05-12 11:06:32,979 INFO L125 PetriNetUnfolderBase]: For 2955/2955 co-relation queries the response was YES. [2024-05-12 11:06:32,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3365 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 3159 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. [2024-05-12 11:06:32,983 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 67 selfloop transitions, 41 changer transitions 0/114 dead transitions. [2024-05-12 11:06:32,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 114 transitions, 1161 flow [2024-05-12 11:06:32,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 11:06:32,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 11:06:32,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-05-12 11:06:32,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4673202614379085 [2024-05-12 11:06:32,984 INFO L175 Difference]: Start difference. First operand has 84 places, 82 transitions, 771 flow. Second operand 9 states and 143 transitions. [2024-05-12 11:06:32,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 114 transitions, 1161 flow [2024-05-12 11:06:32,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 114 transitions, 1105 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-05-12 11:06:32,992 INFO L231 Difference]: Finished difference. Result has 90 places, 87 transitions, 873 flow [2024-05-12 11:06:32,992 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} [2024-05-12 11:06:32,992 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 55 predicate places. [2024-05-12 11:06:32,993 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 87 transitions, 873 flow [2024-05-12 11:06:32,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:06:32,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:06:32,993 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:06:32,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-05-12 11:06:32,993 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)] === [2024-05-12 11:06:32,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:06:32,994 INFO L85 PathProgramCache]: Analyzing trace with hash 2078947888, now seen corresponding path program 6 times [2024-05-12 11:06:32,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:06:32,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772846867] [2024-05-12 11:06:32,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:06:32,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:06:33,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:06:33,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:06:33,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:06:33,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772846867] [2024-05-12 11:06:33,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772846867] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 11:06:33,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 11:06:33,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 11:06:33,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051837828] [2024-05-12 11:06:33,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 11:06:33,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 11:06:33,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:06:33,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 11:06:33,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-05-12 11:06:33,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-05-12 11:06:33,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 87 transitions, 873 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:06:33,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:06:33,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-05-12 11:06:33,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:06:33,369 INFO L124 PetriNetUnfolderBase]: 415/714 cut-off events. [2024-05-12 11:06:33,369 INFO L125 PetriNetUnfolderBase]: For 3553/3559 co-relation queries the response was YES. [2024-05-12 11:06:33,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3486 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 3139 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. [2024-05-12 11:06:33,374 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 69 selfloop transitions, 45 changer transitions 0/120 dead transitions. [2024-05-12 11:06:33,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 120 transitions, 1287 flow [2024-05-12 11:06:33,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 11:06:33,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 11:06:33,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-05-12 11:06:33,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4738562091503268 [2024-05-12 11:06:33,376 INFO L175 Difference]: Start difference. First operand has 90 places, 87 transitions, 873 flow. Second operand 9 states and 145 transitions. [2024-05-12 11:06:33,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 120 transitions, 1287 flow [2024-05-12 11:06:33,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 120 transitions, 1209 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-05-12 11:06:33,384 INFO L231 Difference]: Finished difference. Result has 96 places, 93 transitions, 985 flow [2024-05-12 11:06:33,384 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} [2024-05-12 11:06:33,384 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 61 predicate places. [2024-05-12 11:06:33,384 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 93 transitions, 985 flow [2024-05-12 11:06:33,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:06:33,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:06:33,385 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:06:33,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-05-12 11:06:33,385 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)] === [2024-05-12 11:06:33,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:06:33,386 INFO L85 PathProgramCache]: Analyzing trace with hash -2052824783, now seen corresponding path program 1 times [2024-05-12 11:06:33,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:06:33,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156904243] [2024-05-12 11:06:33,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:06:33,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:06:33,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:06:33,437 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:06:33,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:06:33,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156904243] [2024-05-12 11:06:33,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156904243] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 11:06:33,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351640029] [2024-05-12 11:06:33,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:06:33,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 11:06:33,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 11:06:33,466 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) [2024-05-12 11:06:33,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-05-12 11:06:33,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:06:33,544 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 3 conjunts are in the unsatisfiable core [2024-05-12 11:06:33,547 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 11:06:33,599 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:06:33,599 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 11:06:33,610 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:06:33,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351640029] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 11:06:33,611 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 11:06:33,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-05-12 11:06:33,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941253629] [2024-05-12 11:06:33,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 11:06:33,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 11:06:33,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:06:33,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 11:06:33,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-05-12 11:06:33,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 34 [2024-05-12 11:06:33,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 93 transitions, 985 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 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) [2024-05-12 11:06:33,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:06:33,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 34 [2024-05-12 11:06:33,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:06:33,718 INFO L124 PetriNetUnfolderBase]: 396/727 cut-off events. [2024-05-12 11:06:33,719 INFO L125 PetriNetUnfolderBase]: For 4961/5038 co-relation queries the response was YES. [2024-05-12 11:06:33,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3596 conditions, 727 events. 396/727 cut-off events. For 4961/5038 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3278 event pairs, 80 based on Foata normal form. 61/736 useless extension candidates. Maximal degree in co-relation 3535. Up to 259 conditions per place. [2024-05-12 11:06:33,724 INFO L140 encePairwiseOnDemand]: 31/34 looper letters, 68 selfloop transitions, 27 changer transitions 0/120 dead transitions. [2024-05-12 11:06:33,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 120 transitions, 1385 flow [2024-05-12 11:06:33,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 11:06:33,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 11:06:33,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 133 transitions. [2024-05-12 11:06:33,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6519607843137255 [2024-05-12 11:06:33,726 INFO L175 Difference]: Start difference. First operand has 96 places, 93 transitions, 985 flow. Second operand 6 states and 133 transitions. [2024-05-12 11:06:33,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 120 transitions, 1385 flow [2024-05-12 11:06:33,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 120 transitions, 1295 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-05-12 11:06:33,734 INFO L231 Difference]: Finished difference. Result has 99 places, 96 transitions, 1003 flow [2024-05-12 11:06:33,735 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} [2024-05-12 11:06:33,735 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 64 predicate places. [2024-05-12 11:06:33,735 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 96 transitions, 1003 flow [2024-05-12 11:06:33,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 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) [2024-05-12 11:06:33,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:06:33,736 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:06:33,766 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-05-12 11:06:33,962 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 [2024-05-12 11:06:33,963 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)] === [2024-05-12 11:06:33,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:06:33,963 INFO L85 PathProgramCache]: Analyzing trace with hash -981032600, now seen corresponding path program 1 times [2024-05-12 11:06:33,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:06:33,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435980400] [2024-05-12 11:06:33,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:06:33,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:06:33,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:06:34,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:06:34,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:06:34,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435980400] [2024-05-12 11:06:34,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435980400] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 11:06:34,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 11:06:34,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 11:06:34,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108153948] [2024-05-12 11:06:34,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 11:06:34,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 11:06:34,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:06:34,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 11:06:34,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-05-12 11:06:34,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-05-12 11:06:34,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 96 transitions, 1003 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:06:34,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:06:34,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-05-12 11:06:34,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:06:34,509 INFO L124 PetriNetUnfolderBase]: 547/951 cut-off events. [2024-05-12 11:06:34,509 INFO L125 PetriNetUnfolderBase]: For 6044/6049 co-relation queries the response was YES. [2024-05-12 11:06:34,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4805 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 4359 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. [2024-05-12 11:06:34,516 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 87 selfloop transitions, 51 changer transitions 0/144 dead transitions. [2024-05-12 11:06:34,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 144 transitions, 1584 flow [2024-05-12 11:06:34,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 11:06:34,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 11:06:34,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 169 transitions. [2024-05-12 11:06:34,518 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4970588235294118 [2024-05-12 11:06:34,518 INFO L175 Difference]: Start difference. First operand has 99 places, 96 transitions, 1003 flow. Second operand 10 states and 169 transitions. [2024-05-12 11:06:34,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 144 transitions, 1584 flow [2024-05-12 11:06:34,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 144 transitions, 1518 flow, removed 7 selfloop flow, removed 2 redundant places. [2024-05-12 11:06:34,534 INFO L231 Difference]: Finished difference. Result has 108 places, 101 transitions, 1120 flow [2024-05-12 11:06:34,534 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} [2024-05-12 11:06:34,535 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 73 predicate places. [2024-05-12 11:06:34,535 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 101 transitions, 1120 flow [2024-05-12 11:06:34,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:06:34,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:06:34,536 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:06:34,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-05-12 11:06:34,537 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)] === [2024-05-12 11:06:34,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:06:34,537 INFO L85 PathProgramCache]: Analyzing trace with hash -382170554, now seen corresponding path program 2 times [2024-05-12 11:06:34,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:06:34,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944157379] [2024-05-12 11:06:34,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:06:34,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:06:34,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:06:34,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:06:34,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:06:34,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944157379] [2024-05-12 11:06:34,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944157379] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 11:06:34,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 11:06:34,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 11:06:34,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204165434] [2024-05-12 11:06:34,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 11:06:34,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 11:06:34,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:06:34,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 11:06:34,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-05-12 11:06:34,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-05-12 11:06:34,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 101 transitions, 1120 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:06:34,843 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:06:34,843 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-05-12 11:06:34,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:06:35,104 INFO L124 PetriNetUnfolderBase]: 583/1011 cut-off events. [2024-05-12 11:06:35,104 INFO L125 PetriNetUnfolderBase]: For 7361/7361 co-relation queries the response was YES. [2024-05-12 11:06:35,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5258 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 4741 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. [2024-05-12 11:06:35,115 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 87 selfloop transitions, 52 changer transitions 0/145 dead transitions. [2024-05-12 11:06:35,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 145 transitions, 1669 flow [2024-05-12 11:06:35,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 11:06:35,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 11:06:35,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 167 transitions. [2024-05-12 11:06:35,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49117647058823527 [2024-05-12 11:06:35,117 INFO L175 Difference]: Start difference. First operand has 108 places, 101 transitions, 1120 flow. Second operand 10 states and 167 transitions. [2024-05-12 11:06:35,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 145 transitions, 1669 flow [2024-05-12 11:06:35,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 145 transitions, 1583 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-05-12 11:06:35,132 INFO L231 Difference]: Finished difference. Result has 113 places, 105 transitions, 1215 flow [2024-05-12 11:06:35,132 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} [2024-05-12 11:06:35,133 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 78 predicate places. [2024-05-12 11:06:35,133 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 105 transitions, 1215 flow [2024-05-12 11:06:35,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:06:35,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:06:35,134 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:06:35,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-05-12 11:06:35,134 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)] === [2024-05-12 11:06:35,134 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:06:35,135 INFO L85 PathProgramCache]: Analyzing trace with hash -382166834, now seen corresponding path program 3 times [2024-05-12 11:06:35,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:06:35,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372361663] [2024-05-12 11:06:35,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:06:35,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:06:35,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:06:35,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:06:35,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:06:35,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372361663] [2024-05-12 11:06:35,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372361663] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 11:06:35,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 11:06:35,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 11:06:35,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333423751] [2024-05-12 11:06:35,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 11:06:35,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 11:06:35,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:06:35,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 11:06:35,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-05-12 11:06:35,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-05-12 11:06:35,448 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 105 transitions, 1215 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:06:35,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:06:35,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-05-12 11:06:35,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:06:35,657 INFO L124 PetriNetUnfolderBase]: 601/1038 cut-off events. [2024-05-12 11:06:35,658 INFO L125 PetriNetUnfolderBase]: For 8196/8201 co-relation queries the response was YES. [2024-05-12 11:06:35,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5549 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. [2024-05-12 11:06:35,668 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 84 selfloop transitions, 54 changer transitions 0/144 dead transitions. [2024-05-12 11:06:35,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 144 transitions, 1701 flow [2024-05-12 11:06:35,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 11:06:35,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 11:06:35,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 165 transitions. [2024-05-12 11:06:35,671 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4852941176470588 [2024-05-12 11:06:35,671 INFO L175 Difference]: Start difference. First operand has 113 places, 105 transitions, 1215 flow. Second operand 10 states and 165 transitions. [2024-05-12 11:06:35,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 144 transitions, 1701 flow [2024-05-12 11:06:35,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 144 transitions, 1624 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-05-12 11:06:35,717 INFO L231 Difference]: Finished difference. Result has 117 places, 107 transitions, 1291 flow [2024-05-12 11:06:35,718 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} [2024-05-12 11:06:35,719 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 82 predicate places. [2024-05-12 11:06:35,719 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 107 transitions, 1291 flow [2024-05-12 11:06:35,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:06:35,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:06:35,720 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:06:35,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-05-12 11:06:35,720 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)] === [2024-05-12 11:06:35,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:06:35,721 INFO L85 PathProgramCache]: Analyzing trace with hash -382166679, now seen corresponding path program 1 times [2024-05-12 11:06:35,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:06:35,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856813050] [2024-05-12 11:06:35,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:06:35,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:06:35,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:06:36,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:06:36,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:06:36,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856813050] [2024-05-12 11:06:36,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856813050] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 11:06:36,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 11:06:36,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 11:06:36,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886512683] [2024-05-12 11:06:36,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 11:06:36,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 11:06:36,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:06:36,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 11:06:36,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-05-12 11:06:36,104 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-05-12 11:06:36,104 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 107 transitions, 1291 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:06:36,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:06:36,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-05-12 11:06:36,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:06:36,360 INFO L124 PetriNetUnfolderBase]: 619/1071 cut-off events. [2024-05-12 11:06:36,360 INFO L125 PetriNetUnfolderBase]: For 9365/9370 co-relation queries the response was YES. [2024-05-12 11:06:36,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5788 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 5082 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. [2024-05-12 11:06:36,373 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 85 selfloop transitions, 55 changer transitions 0/146 dead transitions. [2024-05-12 11:06:36,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 146 transitions, 1760 flow [2024-05-12 11:06:36,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 11:06:36,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 11:06:36,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 165 transitions. [2024-05-12 11:06:36,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4852941176470588 [2024-05-12 11:06:36,375 INFO L175 Difference]: Start difference. First operand has 117 places, 107 transitions, 1291 flow. Second operand 10 states and 165 transitions. [2024-05-12 11:06:36,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 146 transitions, 1760 flow [2024-05-12 11:06:36,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 146 transitions, 1648 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-05-12 11:06:36,395 INFO L231 Difference]: Finished difference. Result has 119 places, 109 transitions, 1329 flow [2024-05-12 11:06:36,395 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} [2024-05-12 11:06:36,395 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 84 predicate places. [2024-05-12 11:06:36,396 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 109 transitions, 1329 flow [2024-05-12 11:06:36,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:06:36,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:06:36,396 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:06:36,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-05-12 11:06:36,396 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)] === [2024-05-12 11:06:36,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:06:36,397 INFO L85 PathProgramCache]: Analyzing trace with hash -326755419, now seen corresponding path program 2 times [2024-05-12 11:06:36,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:06:36,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483134958] [2024-05-12 11:06:36,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:06:36,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:06:36,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:06:36,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:06:36,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:06:36,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483134958] [2024-05-12 11:06:36,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483134958] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 11:06:36,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 11:06:36,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 11:06:36,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490842367] [2024-05-12 11:06:36,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 11:06:36,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 11:06:36,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:06:36,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 11:06:36,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-05-12 11:06:36,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-05-12 11:06:36,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 109 transitions, 1329 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:06:36,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:06:36,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-05-12 11:06:36,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:06:36,926 INFO L124 PetriNetUnfolderBase]: 637/1098 cut-off events. [2024-05-12 11:06:36,926 INFO L125 PetriNetUnfolderBase]: For 10073/10078 co-relation queries the response was YES. [2024-05-12 11:06:36,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6024 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 5200 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. [2024-05-12 11:06:36,935 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 88 selfloop transitions, 51 changer transitions 0/145 dead transitions. [2024-05-12 11:06:36,935 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 145 transitions, 1792 flow [2024-05-12 11:06:36,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 11:06:36,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 11:06:36,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 161 transitions. [2024-05-12 11:06:36,936 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47352941176470587 [2024-05-12 11:06:36,937 INFO L175 Difference]: Start difference. First operand has 119 places, 109 transitions, 1329 flow. Second operand 10 states and 161 transitions. [2024-05-12 11:06:36,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 145 transitions, 1792 flow [2024-05-12 11:06:36,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 145 transitions, 1699 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-05-12 11:06:36,958 INFO L231 Difference]: Finished difference. Result has 122 places, 111 transitions, 1380 flow [2024-05-12 11:06:36,958 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} [2024-05-12 11:06:36,958 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 87 predicate places. [2024-05-12 11:06:36,958 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 111 transitions, 1380 flow [2024-05-12 11:06:36,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:06:36,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:06:36,959 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:06:36,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-05-12 11:06:36,959 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)] === [2024-05-12 11:06:36,959 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:06:36,960 INFO L85 PathProgramCache]: Analyzing trace with hash -326759294, now seen corresponding path program 4 times [2024-05-12 11:06:36,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:06:36,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201523797] [2024-05-12 11:06:36,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:06:36,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:06:36,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:06:37,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:06:37,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:06:37,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201523797] [2024-05-12 11:06:37,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201523797] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 11:06:37,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 11:06:37,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 11:06:37,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594013271] [2024-05-12 11:06:37,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 11:06:37,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 11:06:37,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:06:37,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 11:06:37,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-05-12 11:06:37,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-05-12 11:06:37,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 111 transitions, 1380 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:06:37,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:06:37,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-05-12 11:06:37,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:06:37,481 INFO L124 PetriNetUnfolderBase]: 673/1158 cut-off events. [2024-05-12 11:06:37,482 INFO L125 PetriNetUnfolderBase]: For 12189/12194 co-relation queries the response was YES. [2024-05-12 11:06:37,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6504 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 5587 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. [2024-05-12 11:06:37,490 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 94 selfloop transitions, 52 changer transitions 0/152 dead transitions. [2024-05-12 11:06:37,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 152 transitions, 1957 flow [2024-05-12 11:06:37,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 11:06:37,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 11:06:37,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 163 transitions. [2024-05-12 11:06:37,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47941176470588237 [2024-05-12 11:06:37,491 INFO L175 Difference]: Start difference. First operand has 122 places, 111 transitions, 1380 flow. Second operand 10 states and 163 transitions. [2024-05-12 11:06:37,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 152 transitions, 1957 flow [2024-05-12 11:06:37,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 152 transitions, 1839 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-05-12 11:06:37,515 INFO L231 Difference]: Finished difference. Result has 125 places, 115 transitions, 1453 flow [2024-05-12 11:06:37,515 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} [2024-05-12 11:06:37,516 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 90 predicate places. [2024-05-12 11:06:37,516 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 115 transitions, 1453 flow [2024-05-12 11:06:37,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:06:37,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:06:37,516 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:06:37,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-05-12 11:06:37,517 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)] === [2024-05-12 11:06:37,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:06:37,517 INFO L85 PathProgramCache]: Analyzing trace with hash -1186224750, now seen corresponding path program 5 times [2024-05-12 11:06:37,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:06:37,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289689489] [2024-05-12 11:06:37,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:06:37,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:06:37,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:06:37,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:06:37,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:06:37,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289689489] [2024-05-12 11:06:37,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289689489] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 11:06:37,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 11:06:37,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 11:06:37,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237361696] [2024-05-12 11:06:37,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 11:06:37,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 11:06:37,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:06:37,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 11:06:37,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-05-12 11:06:37,801 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-05-12 11:06:37,801 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 115 transitions, 1453 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:06:37,801 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:06:37,801 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-05-12 11:06:37,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:06:38,067 INFO L124 PetriNetUnfolderBase]: 691/1188 cut-off events. [2024-05-12 11:06:38,067 INFO L125 PetriNetUnfolderBase]: For 13282/13282 co-relation queries the response was YES. [2024-05-12 11:06:38,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6740 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 5774 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. [2024-05-12 11:06:38,075 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 91 selfloop transitions, 54 changer transitions 0/151 dead transitions. [2024-05-12 11:06:38,076 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 151 transitions, 1959 flow [2024-05-12 11:06:38,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 11:06:38,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 11:06:38,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 161 transitions. [2024-05-12 11:06:38,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47352941176470587 [2024-05-12 11:06:38,077 INFO L175 Difference]: Start difference. First operand has 125 places, 115 transitions, 1453 flow. Second operand 10 states and 161 transitions. [2024-05-12 11:06:38,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 151 transitions, 1959 flow [2024-05-12 11:06:38,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 151 transitions, 1881 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-05-12 11:06:38,105 INFO L231 Difference]: Finished difference. Result has 129 places, 117 transitions, 1534 flow [2024-05-12 11:06:38,106 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} [2024-05-12 11:06:38,106 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 94 predicate places. [2024-05-12 11:06:38,106 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 117 transitions, 1534 flow [2024-05-12 11:06:38,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:06:38,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:06:38,107 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:06:38,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-05-12 11:06:38,107 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)] === [2024-05-12 11:06:38,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:06:38,107 INFO L85 PathProgramCache]: Analyzing trace with hash -1038615150, now seen corresponding path program 6 times [2024-05-12 11:06:38,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:06:38,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961399729] [2024-05-12 11:06:38,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:06:38,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:06:38,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:06:38,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:06:38,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:06:38,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961399729] [2024-05-12 11:06:38,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961399729] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 11:06:38,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 11:06:38,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 11:06:38,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552624369] [2024-05-12 11:06:38,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 11:06:38,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 11:06:38,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:06:38,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 11:06:38,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-05-12 11:06:38,388 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-05-12 11:06:38,388 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 117 transitions, 1534 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:06:38,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:06:38,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-05-12 11:06:38,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:06:38,662 INFO L124 PetriNetUnfolderBase]: 709/1215 cut-off events. [2024-05-12 11:06:38,663 INFO L125 PetriNetUnfolderBase]: For 14795/14795 co-relation queries the response was YES. [2024-05-12 11:06:38,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7024 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 5935 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. [2024-05-12 11:06:38,673 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 93 selfloop transitions, 54 changer transitions 0/153 dead transitions. [2024-05-12 11:06:38,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 153 transitions, 2047 flow [2024-05-12 11:06:38,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 11:06:38,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 11:06:38,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 161 transitions. [2024-05-12 11:06:38,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47352941176470587 [2024-05-12 11:06:38,674 INFO L175 Difference]: Start difference. First operand has 129 places, 117 transitions, 1534 flow. Second operand 10 states and 161 transitions. [2024-05-12 11:06:38,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 153 transitions, 2047 flow [2024-05-12 11:06:38,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 153 transitions, 1964 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-05-12 11:06:38,704 INFO L231 Difference]: Finished difference. Result has 132 places, 119 transitions, 1613 flow [2024-05-12 11:06:38,704 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} [2024-05-12 11:06:38,704 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 97 predicate places. [2024-05-12 11:06:38,705 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 119 transitions, 1613 flow [2024-05-12 11:06:38,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:06:38,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:06:38,705 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:06:38,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-05-12 11:06:38,705 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)] === [2024-05-12 11:06:38,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:06:38,706 INFO L85 PathProgramCache]: Analyzing trace with hash -1038378775, now seen corresponding path program 3 times [2024-05-12 11:06:38,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:06:38,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299761685] [2024-05-12 11:06:38,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:06:38,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:06:38,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:06:38,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:06:38,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:06:38,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299761685] [2024-05-12 11:06:38,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299761685] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 11:06:38,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 11:06:38,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 11:06:38,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046651402] [2024-05-12 11:06:38,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 11:06:38,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 11:06:38,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:06:38,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 11:06:38,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2024-05-12 11:06:38,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-05-12 11:06:38,992 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 119 transitions, 1613 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:06:38,992 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:06:38,992 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-05-12 11:06:38,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:06:39,297 INFO L124 PetriNetUnfolderBase]: 745/1275 cut-off events. [2024-05-12 11:06:39,298 INFO L125 PetriNetUnfolderBase]: For 16389/16394 co-relation queries the response was YES. [2024-05-12 11:06:39,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7461 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 6341 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. [2024-05-12 11:06:39,306 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 99 selfloop transitions, 55 changer transitions 0/160 dead transitions. [2024-05-12 11:06:39,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 160 transitions, 2167 flow [2024-05-12 11:06:39,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 11:06:39,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 11:06:39,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 164 transitions. [2024-05-12 11:06:39,307 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4823529411764706 [2024-05-12 11:06:39,307 INFO L175 Difference]: Start difference. First operand has 132 places, 119 transitions, 1613 flow. Second operand 10 states and 164 transitions. [2024-05-12 11:06:39,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 160 transitions, 2167 flow [2024-05-12 11:06:39,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 160 transitions, 2045 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-05-12 11:06:39,336 INFO L231 Difference]: Finished difference. Result has 135 places, 123 transitions, 1689 flow [2024-05-12 11:06:39,336 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} [2024-05-12 11:06:39,336 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 100 predicate places. [2024-05-12 11:06:39,337 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 123 transitions, 1689 flow [2024-05-12 11:06:39,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:06:39,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:06:39,337 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:06:39,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-05-12 11:06:39,337 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)] === [2024-05-12 11:06:39,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:06:39,338 INFO L85 PathProgramCache]: Analyzing trace with hash -1038614995, now seen corresponding path program 4 times [2024-05-12 11:06:39,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:06:39,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207460784] [2024-05-12 11:06:39,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:06:39,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:06:39,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:06:39,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:06:39,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:06:39,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207460784] [2024-05-12 11:06:39,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207460784] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 11:06:39,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 11:06:39,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 11:06:39,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441099004] [2024-05-12 11:06:39,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 11:06:39,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 11:06:39,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:06:39,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 11:06:39,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-05-12 11:06:39,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-05-12 11:06:39,610 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 123 transitions, 1689 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:06:39,610 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:06:39,610 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-05-12 11:06:39,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:06:39,846 INFO L124 PetriNetUnfolderBase]: 763/1305 cut-off events. [2024-05-12 11:06:39,846 INFO L125 PetriNetUnfolderBase]: For 18011/18016 co-relation queries the response was YES. [2024-05-12 11:06:39,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7795 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 6510 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. [2024-05-12 11:06:39,856 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 95 selfloop transitions, 58 changer transitions 0/159 dead transitions. [2024-05-12 11:06:39,857 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 159 transitions, 2195 flow [2024-05-12 11:06:39,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 11:06:39,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 11:06:39,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 161 transitions. [2024-05-12 11:06:39,858 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47352941176470587 [2024-05-12 11:06:39,858 INFO L175 Difference]: Start difference. First operand has 135 places, 123 transitions, 1689 flow. Second operand 10 states and 161 transitions. [2024-05-12 11:06:39,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 159 transitions, 2195 flow [2024-05-12 11:06:39,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 159 transitions, 2105 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-05-12 11:06:39,893 INFO L231 Difference]: Finished difference. Result has 139 places, 125 transitions, 1764 flow [2024-05-12 11:06:39,894 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} [2024-05-12 11:06:39,894 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 104 predicate places. [2024-05-12 11:06:39,894 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 125 transitions, 1764 flow [2024-05-12 11:06:39,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:06:39,894 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:06:39,894 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:06:39,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-05-12 11:06:39,895 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)] === [2024-05-12 11:06:39,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:06:39,895 INFO L85 PathProgramCache]: Analyzing trace with hash -198769292, now seen corresponding path program 7 times [2024-05-12 11:06:39,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:06:39,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794054650] [2024-05-12 11:06:39,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:06:39,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:06:39,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:06:40,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:06:40,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:06:40,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794054650] [2024-05-12 11:06:40,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794054650] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 11:06:40,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 11:06:40,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 11:06:40,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993896879] [2024-05-12 11:06:40,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 11:06:40,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 11:06:40,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:06:40,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 11:06:40,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-05-12 11:06:40,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-05-12 11:06:40,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 125 transitions, 1764 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:06:40,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:06:40,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-05-12 11:06:40,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:06:40,433 INFO L124 PetriNetUnfolderBase]: 781/1331 cut-off events. [2024-05-12 11:06:40,433 INFO L125 PetriNetUnfolderBase]: For 20951/20957 co-relation queries the response was YES. [2024-05-12 11:06:40,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8130 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 6663 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. [2024-05-12 11:06:40,444 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 93 selfloop transitions, 59 changer transitions 0/158 dead transitions. [2024-05-12 11:06:40,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 158 transitions, 2297 flow [2024-05-12 11:06:40,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 11:06:40,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 11:06:40,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 158 transitions. [2024-05-12 11:06:40,446 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4647058823529412 [2024-05-12 11:06:40,446 INFO L175 Difference]: Start difference. First operand has 139 places, 125 transitions, 1764 flow. Second operand 10 states and 158 transitions. [2024-05-12 11:06:40,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 158 transitions, 2297 flow [2024-05-12 11:06:40,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 158 transitions, 2200 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-05-12 11:06:40,483 INFO L231 Difference]: Finished difference. Result has 142 places, 127 transitions, 1843 flow [2024-05-12 11:06:40,484 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} [2024-05-12 11:06:40,484 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 107 predicate places. [2024-05-12 11:06:40,484 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 127 transitions, 1843 flow [2024-05-12 11:06:40,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:06:40,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:06:40,485 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:06:40,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-05-12 11:06:40,485 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)] === [2024-05-12 11:06:40,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:06:40,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1057049021, now seen corresponding path program 5 times [2024-05-12 11:06:40,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:06:40,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827724236] [2024-05-12 11:06:40,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:06:40,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:06:40,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:06:40,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:06:40,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:06:40,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827724236] [2024-05-12 11:06:40,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827724236] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 11:06:40,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 11:06:40,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 11:06:40,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926571608] [2024-05-12 11:06:40,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 11:06:40,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 11:06:40,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:06:40,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 11:06:40,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-05-12 11:06:40,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-05-12 11:06:40,732 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 127 transitions, 1843 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:06:40,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:06:40,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-05-12 11:06:40,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:06:41,013 INFO L124 PetriNetUnfolderBase]: 799/1358 cut-off events. [2024-05-12 11:06:41,014 INFO L125 PetriNetUnfolderBase]: For 22219/22225 co-relation queries the response was YES. [2024-05-12 11:06:41,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8318 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 6814 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. [2024-05-12 11:06:41,025 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 94 selfloop transitions, 60 changer transitions 0/160 dead transitions. [2024-05-12 11:06:41,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 160 transitions, 2349 flow [2024-05-12 11:06:41,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 11:06:41,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 11:06:41,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 158 transitions. [2024-05-12 11:06:41,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4647058823529412 [2024-05-12 11:06:41,026 INFO L175 Difference]: Start difference. First operand has 142 places, 127 transitions, 1843 flow. Second operand 10 states and 158 transitions. [2024-05-12 11:06:41,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 160 transitions, 2349 flow [2024-05-12 11:06:41,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 160 transitions, 2219 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-05-12 11:06:41,066 INFO L231 Difference]: Finished difference. Result has 144 places, 129 transitions, 1886 flow [2024-05-12 11:06:41,066 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} [2024-05-12 11:06:41,066 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 109 predicate places. [2024-05-12 11:06:41,067 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 129 transitions, 1886 flow [2024-05-12 11:06:41,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:06:41,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:06:41,067 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:06:41,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-05-12 11:06:41,067 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)] === [2024-05-12 11:06:41,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:06:41,067 INFO L85 PathProgramCache]: Analyzing trace with hash -1056812801, now seen corresponding path program 6 times [2024-05-12 11:06:41,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:06:41,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884328702] [2024-05-12 11:06:41,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:06:41,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:06:41,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:06:41,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:06:41,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:06:41,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884328702] [2024-05-12 11:06:41,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884328702] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 11:06:41,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 11:06:41,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 11:06:41,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165273852] [2024-05-12 11:06:41,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 11:06:41,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 11:06:41,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:06:41,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 11:06:41,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2024-05-12 11:06:41,348 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-05-12 11:06:41,348 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 129 transitions, 1886 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:06:41,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:06:41,348 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-05-12 11:06:41,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:06:41,659 INFO L124 PetriNetUnfolderBase]: 835/1421 cut-off events. [2024-05-12 11:06:41,659 INFO L125 PetriNetUnfolderBase]: For 24198/24198 co-relation queries the response was YES. [2024-05-12 11:06:41,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8818 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 7277 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. [2024-05-12 11:06:41,670 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 100 selfloop transitions, 61 changer transitions 0/167 dead transitions. [2024-05-12 11:06:41,670 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 167 transitions, 2466 flow [2024-05-12 11:06:41,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 11:06:41,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 11:06:41,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 161 transitions. [2024-05-12 11:06:41,671 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47352941176470587 [2024-05-12 11:06:41,671 INFO L175 Difference]: Start difference. First operand has 144 places, 129 transitions, 1886 flow. Second operand 10 states and 161 transitions. [2024-05-12 11:06:41,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 167 transitions, 2466 flow [2024-05-12 11:06:41,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 167 transitions, 2362 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-05-12 11:06:41,713 INFO L231 Difference]: Finished difference. Result has 148 places, 133 transitions, 2002 flow [2024-05-12 11:06:41,714 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} [2024-05-12 11:06:41,714 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 113 predicate places. [2024-05-12 11:06:41,714 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 133 transitions, 2002 flow [2024-05-12 11:06:41,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:06:41,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:06:41,715 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:06:41,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-05-12 11:06:41,715 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)] === [2024-05-12 11:06:41,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:06:41,716 INFO L85 PathProgramCache]: Analyzing trace with hash -1204658776, now seen corresponding path program 8 times [2024-05-12 11:06:41,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:06:41,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967713469] [2024-05-12 11:06:41,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:06:41,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:06:41,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:06:41,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:06:41,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:06:41,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967713469] [2024-05-12 11:06:41,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967713469] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 11:06:41,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 11:06:41,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 11:06:41,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55138439] [2024-05-12 11:06:41,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 11:06:41,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 11:06:41,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:06:41,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 11:06:41,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-05-12 11:06:42,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-05-12 11:06:42,014 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 133 transitions, 2002 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:06:42,014 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:06:42,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-05-12 11:06:42,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:06:42,319 INFO L124 PetriNetUnfolderBase]: 853/1448 cut-off events. [2024-05-12 11:06:42,319 INFO L125 PetriNetUnfolderBase]: For 27567/27567 co-relation queries the response was YES. [2024-05-12 11:06:42,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9258 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 7385 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. [2024-05-12 11:06:42,328 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 95 selfloop transitions, 65 changer transitions 0/166 dead transitions. [2024-05-12 11:06:42,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 166 transitions, 2569 flow [2024-05-12 11:06:42,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 11:06:42,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 11:06:42,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 158 transitions. [2024-05-12 11:06:42,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4647058823529412 [2024-05-12 11:06:42,329 INFO L175 Difference]: Start difference. First operand has 148 places, 133 transitions, 2002 flow. Second operand 10 states and 158 transitions. [2024-05-12 11:06:42,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 166 transitions, 2569 flow [2024-05-12 11:06:42,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 166 transitions, 2466 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-05-12 11:06:42,373 INFO L231 Difference]: Finished difference. Result has 152 places, 135 transitions, 2091 flow [2024-05-12 11:06:42,373 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} [2024-05-12 11:06:42,373 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 117 predicate places. [2024-05-12 11:06:42,373 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 135 transitions, 2091 flow [2024-05-12 11:06:42,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:06:42,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:06:42,374 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:06:42,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-05-12 11:06:42,374 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)] === [2024-05-12 11:06:42,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:06:42,374 INFO L85 PathProgramCache]: Analyzing trace with hash -1204658621, now seen corresponding path program 7 times [2024-05-12 11:06:42,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:06:42,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289587729] [2024-05-12 11:06:42,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:06:42,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:06:42,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:06:42,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:06:42,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:06:42,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289587729] [2024-05-12 11:06:42,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289587729] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 11:06:42,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 11:06:42,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 11:06:42,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218314371] [2024-05-12 11:06:42,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 11:06:42,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 11:06:42,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:06:42,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 11:06:42,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-05-12 11:06:42,664 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-05-12 11:06:42,664 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 135 transitions, 2091 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:06:42,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:06:42,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-05-12 11:06:42,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:06:42,909 INFO L124 PetriNetUnfolderBase]: 871/1475 cut-off events. [2024-05-12 11:06:42,909 INFO L125 PetriNetUnfolderBase]: For 29257/29263 co-relation queries the response was YES. [2024-05-12 11:06:42,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9464 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 7534 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. [2024-05-12 11:06:42,920 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 96 selfloop transitions, 66 changer transitions 0/168 dead transitions. [2024-05-12 11:06:42,920 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 168 transitions, 2627 flow [2024-05-12 11:06:42,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 11:06:42,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 11:06:42,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 158 transitions. [2024-05-12 11:06:42,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4647058823529412 [2024-05-12 11:06:42,921 INFO L175 Difference]: Start difference. First operand has 152 places, 135 transitions, 2091 flow. Second operand 10 states and 158 transitions. [2024-05-12 11:06:42,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 168 transitions, 2627 flow [2024-05-12 11:06:43,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 168 transitions, 2483 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-05-12 11:06:43,009 INFO L231 Difference]: Finished difference. Result has 154 places, 137 transitions, 2138 flow [2024-05-12 11:06:43,009 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} [2024-05-12 11:06:43,009 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 119 predicate places. [2024-05-12 11:06:43,009 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 137 transitions, 2138 flow [2024-05-12 11:06:43,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:06:43,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:06:43,010 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:06:43,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-05-12 11:06:43,010 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)] === [2024-05-12 11:06:43,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:06:43,011 INFO L85 PathProgramCache]: Analyzing trace with hash -1204720156, now seen corresponding path program 9 times [2024-05-12 11:06:43,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:06:43,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827225253] [2024-05-12 11:06:43,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:06:43,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:06:43,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:06:43,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:06:43,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:06:43,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827225253] [2024-05-12 11:06:43,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827225253] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 11:06:43,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 11:06:43,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 11:06:43,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804674665] [2024-05-12 11:06:43,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 11:06:43,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 11:06:43,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:06:43,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 11:06:43,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-05-12 11:06:43,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-05-12 11:06:43,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 137 transitions, 2138 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:06:43,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:06:43,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-05-12 11:06:43,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:06:43,587 INFO L124 PetriNetUnfolderBase]: 889/1505 cut-off events. [2024-05-12 11:06:43,587 INFO L125 PetriNetUnfolderBase]: For 31950/31956 co-relation queries the response was YES. [2024-05-12 11:06:43,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9802 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 7735 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. [2024-05-12 11:06:43,598 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 101 selfloop transitions, 67 changer transitions 0/174 dead transitions. [2024-05-12 11:06:43,598 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 174 transitions, 2806 flow [2024-05-12 11:06:43,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 11:06:43,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 11:06:43,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 160 transitions. [2024-05-12 11:06:43,600 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47058823529411764 [2024-05-12 11:06:43,600 INFO L175 Difference]: Start difference. First operand has 154 places, 137 transitions, 2138 flow. Second operand 10 states and 160 transitions. [2024-05-12 11:06:43,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 174 transitions, 2806 flow [2024-05-12 11:06:43,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 174 transitions, 2696 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-05-12 11:06:43,652 INFO L231 Difference]: Finished difference. Result has 158 places, 140 transitions, 2253 flow [2024-05-12 11:06:43,652 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} [2024-05-12 11:06:43,653 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 123 predicate places. [2024-05-12 11:06:43,653 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 140 transitions, 2253 flow [2024-05-12 11:06:43,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:06:43,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:06:43,653 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:06:43,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-05-12 11:06:43,653 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)] === [2024-05-12 11:06:43,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:06:43,654 INFO L85 PathProgramCache]: Analyzing trace with hash 31155693, now seen corresponding path program 8 times [2024-05-12 11:06:43,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:06:43,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828625225] [2024-05-12 11:06:43,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:06:43,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:06:43,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:06:43,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:06:43,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:06:43,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828625225] [2024-05-12 11:06:43,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828625225] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 11:06:43,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 11:06:43,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 11:06:43,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033442759] [2024-05-12 11:06:43,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 11:06:43,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 11:06:43,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:06:43,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 11:06:43,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-05-12 11:06:43,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-05-12 11:06:43,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 140 transitions, 2253 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:06:43,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:06:43,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-05-12 11:06:43,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:06:44,227 INFO L124 PetriNetUnfolderBase]: 925/1565 cut-off events. [2024-05-12 11:06:44,227 INFO L125 PetriNetUnfolderBase]: For 34162/34168 co-relation queries the response was YES. [2024-05-12 11:06:44,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10284 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 8148 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. [2024-05-12 11:06:44,239 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 99 selfloop transitions, 71 changer transitions 0/176 dead transitions. [2024-05-12 11:06:44,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 176 transitions, 2865 flow [2024-05-12 11:06:44,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 11:06:44,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 11:06:44,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 157 transitions. [2024-05-12 11:06:44,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46176470588235297 [2024-05-12 11:06:44,240 INFO L175 Difference]: Start difference. First operand has 158 places, 140 transitions, 2253 flow. Second operand 10 states and 157 transitions. [2024-05-12 11:06:44,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 176 transitions, 2865 flow [2024-05-12 11:06:44,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 176 transitions, 2745 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-05-12 11:06:44,297 INFO L231 Difference]: Finished difference. Result has 161 places, 145 transitions, 2402 flow [2024-05-12 11:06:44,297 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} [2024-05-12 11:06:44,298 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 126 predicate places. [2024-05-12 11:06:44,298 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 145 transitions, 2402 flow [2024-05-12 11:06:44,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:06:44,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:06:44,299 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:06:44,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-05-12 11:06:44,299 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)] === [2024-05-12 11:06:44,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:06:44,299 INFO L85 PathProgramCache]: Analyzing trace with hash 23112123, now seen corresponding path program 9 times [2024-05-12 11:06:44,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:06:44,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343900570] [2024-05-12 11:06:44,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:06:44,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:06:44,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:06:44,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:06:44,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:06:44,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343900570] [2024-05-12 11:06:44,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343900570] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 11:06:44,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 11:06:44,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 11:06:44,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421506588] [2024-05-12 11:06:44,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 11:06:44,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 11:06:44,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:06:44,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 11:06:44,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-05-12 11:06:44,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-05-12 11:06:44,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 145 transitions, 2402 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:06:44,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:06:44,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-05-12 11:06:44,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:06:44,834 INFO L124 PetriNetUnfolderBase]: 925/1565 cut-off events. [2024-05-12 11:06:44,834 INFO L125 PetriNetUnfolderBase]: For 38341/38347 co-relation queries the response was YES. [2024-05-12 11:06:44,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10606 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 8132 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. [2024-05-12 11:06:44,847 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 101 selfloop transitions, 73 changer transitions 0/180 dead transitions. [2024-05-12 11:06:44,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 180 transitions, 2986 flow [2024-05-12 11:06:44,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 11:06:44,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 11:06:44,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 161 transitions. [2024-05-12 11:06:44,848 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47352941176470587 [2024-05-12 11:06:44,848 INFO L175 Difference]: Start difference. First operand has 161 places, 145 transitions, 2402 flow. Second operand 10 states and 161 transitions. [2024-05-12 11:06:44,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 180 transitions, 2986 flow [2024-05-12 11:06:44,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 180 transitions, 2861 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-05-12 11:06:44,970 INFO L231 Difference]: Finished difference. Result has 166 places, 148 transitions, 2507 flow [2024-05-12 11:06:44,970 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} [2024-05-12 11:06:44,970 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 131 predicate places. [2024-05-12 11:06:44,970 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 148 transitions, 2507 flow [2024-05-12 11:06:44,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:06:44,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:06:44,971 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:06:44,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-05-12 11:06:44,971 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)] === [2024-05-12 11:06:44,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:06:44,971 INFO L85 PathProgramCache]: Analyzing trace with hash 22875748, now seen corresponding path program 10 times [2024-05-12 11:06:44,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:06:44,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020429101] [2024-05-12 11:06:44,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:06:44,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:06:44,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:06:45,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:06:45,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:06:45,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020429101] [2024-05-12 11:06:45,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020429101] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 11:06:45,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 11:06:45,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 11:06:45,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92105031] [2024-05-12 11:06:45,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 11:06:45,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 11:06:45,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:06:45,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 11:06:45,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-05-12 11:06:45,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-05-12 11:06:45,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 148 transitions, 2507 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:06:45,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:06:45,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-05-12 11:06:45,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:06:45,476 INFO L124 PetriNetUnfolderBase]: 919/1556 cut-off events. [2024-05-12 11:06:45,476 INFO L125 PetriNetUnfolderBase]: For 39801/39807 co-relation queries the response was YES. [2024-05-12 11:06:45,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10566 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 8059 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. [2024-05-12 11:06:45,488 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 96 selfloop transitions, 75 changer transitions 0/177 dead transitions. [2024-05-12 11:06:45,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 177 transitions, 3041 flow [2024-05-12 11:06:45,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 11:06:45,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 11:06:45,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 158 transitions. [2024-05-12 11:06:45,490 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4647058823529412 [2024-05-12 11:06:45,490 INFO L175 Difference]: Start difference. First operand has 166 places, 148 transitions, 2507 flow. Second operand 10 states and 158 transitions. [2024-05-12 11:06:45,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 177 transitions, 3041 flow [2024-05-12 11:06:45,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 177 transitions, 2931 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-05-12 11:06:45,570 INFO L231 Difference]: Finished difference. Result has 171 places, 148 transitions, 2552 flow [2024-05-12 11:06:45,570 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} [2024-05-12 11:06:45,571 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 136 predicate places. [2024-05-12 11:06:45,571 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 148 transitions, 2552 flow [2024-05-12 11:06:45,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:06:45,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:06:45,571 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:06:45,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-05-12 11:06:45,571 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)] === [2024-05-12 11:06:45,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:06:45,572 INFO L85 PathProgramCache]: Analyzing trace with hash 22875903, now seen corresponding path program 10 times [2024-05-12 11:06:45,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:06:45,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605221435] [2024-05-12 11:06:45,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:06:45,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:06:45,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:06:45,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:06:45,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:06:45,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605221435] [2024-05-12 11:06:45,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605221435] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 11:06:45,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 11:06:45,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 11:06:45,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280826131] [2024-05-12 11:06:45,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 11:06:45,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 11:06:45,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:06:45,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 11:06:45,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-05-12 11:06:45,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-05-12 11:06:45,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 148 transitions, 2552 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:06:45,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:06:45,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-05-12 11:06:45,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:06:46,118 INFO L124 PetriNetUnfolderBase]: 937/1586 cut-off events. [2024-05-12 11:06:46,118 INFO L125 PetriNetUnfolderBase]: For 42420/42426 co-relation queries the response was YES. [2024-05-12 11:06:46,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10779 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 8287 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. [2024-05-12 11:06:46,129 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 97 selfloop transitions, 76 changer transitions 0/179 dead transitions. [2024-05-12 11:06:46,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 179 transitions, 3110 flow [2024-05-12 11:06:46,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 11:06:46,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 11:06:46,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 158 transitions. [2024-05-12 11:06:46,130 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4647058823529412 [2024-05-12 11:06:46,131 INFO L175 Difference]: Start difference. First operand has 171 places, 148 transitions, 2552 flow. Second operand 10 states and 158 transitions. [2024-05-12 11:06:46,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 179 transitions, 3110 flow [2024-05-12 11:06:46,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 179 transitions, 2898 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-05-12 11:06:46,204 INFO L231 Difference]: Finished difference. Result has 172 places, 150 transitions, 2561 flow [2024-05-12 11:06:46,204 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} [2024-05-12 11:06:46,204 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 137 predicate places. [2024-05-12 11:06:46,204 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 150 transitions, 2561 flow [2024-05-12 11:06:46,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:06:46,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:06:46,205 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:06:46,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-05-12 11:06:46,205 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)] === [2024-05-12 11:06:46,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:06:46,205 INFO L85 PathProgramCache]: Analyzing trace with hash -1957247865, now seen corresponding path program 1 times [2024-05-12 11:06:46,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:06:46,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187013475] [2024-05-12 11:06:46,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:06:46,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:06:46,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:06:46,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:06:46,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:06:46,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187013475] [2024-05-12 11:06:46,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187013475] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 11:06:46,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 11:06:46,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 11:06:46,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141602841] [2024-05-12 11:06:46,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 11:06:46,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 11:06:46,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:06:46,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 11:06:46,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-05-12 11:06:46,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-05-12 11:06:46,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 150 transitions, 2561 flow. Second operand has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 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) [2024-05-12 11:06:46,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:06:46,504 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-05-12 11:06:46,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:06:46,872 INFO L124 PetriNetUnfolderBase]: 991/1680 cut-off events. [2024-05-12 11:06:46,872 INFO L125 PetriNetUnfolderBase]: For 48161/48166 co-relation queries the response was YES. [2024-05-12 11:06:46,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11275 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 8911 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. [2024-05-12 11:06:46,883 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 112 selfloop transitions, 82 changer transitions 0/200 dead transitions. [2024-05-12 11:06:46,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 200 transitions, 3397 flow [2024-05-12 11:06:46,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 11:06:46,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 11:06:46,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 185 transitions. [2024-05-12 11:06:46,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4946524064171123 [2024-05-12 11:06:46,884 INFO L175 Difference]: Start difference. First operand has 172 places, 150 transitions, 2561 flow. Second operand 11 states and 185 transitions. [2024-05-12 11:06:46,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 200 transitions, 3397 flow [2024-05-12 11:06:46,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 200 transitions, 3264 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-05-12 11:06:46,961 INFO L231 Difference]: Finished difference. Result has 176 places, 151 transitions, 2624 flow [2024-05-12 11:06:46,961 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} [2024-05-12 11:06:46,962 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 141 predicate places. [2024-05-12 11:06:46,962 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 151 transitions, 2624 flow [2024-05-12 11:06:46,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 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) [2024-05-12 11:06:46,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:06:46,962 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:06:46,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-05-12 11:06:46,962 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)] === [2024-05-12 11:06:46,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:06:46,963 INFO L85 PathProgramCache]: Analyzing trace with hash 1037615529, now seen corresponding path program 2 times [2024-05-12 11:06:46,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:06:46,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378216688] [2024-05-12 11:06:46,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:06:46,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:06:46,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:06:47,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:06:47,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:06:47,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378216688] [2024-05-12 11:06:47,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378216688] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 11:06:47,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 11:06:47,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 11:06:47,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074276864] [2024-05-12 11:06:47,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 11:06:47,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 11:06:47,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:06:47,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 11:06:47,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-05-12 11:06:47,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-05-12 11:06:47,284 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 151 transitions, 2624 flow. Second operand has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 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) [2024-05-12 11:06:47,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:06:47,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-05-12 11:06:47,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:06:47,629 INFO L124 PetriNetUnfolderBase]: 1045/1767 cut-off events. [2024-05-12 11:06:47,630 INFO L125 PetriNetUnfolderBase]: For 53897/53902 co-relation queries the response was YES. [2024-05-12 11:06:47,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11790 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. [2024-05-12 11:06:47,643 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 112 selfloop transitions, 80 changer transitions 0/198 dead transitions. [2024-05-12 11:06:47,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 198 transitions, 3395 flow [2024-05-12 11:06:47,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 11:06:47,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 11:06:47,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 183 transitions. [2024-05-12 11:06:47,645 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4893048128342246 [2024-05-12 11:06:47,645 INFO L175 Difference]: Start difference. First operand has 176 places, 151 transitions, 2624 flow. Second operand 11 states and 183 transitions. [2024-05-12 11:06:47,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 198 transitions, 3395 flow [2024-05-12 11:06:47,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 198 transitions, 3244 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-05-12 11:06:47,764 INFO L231 Difference]: Finished difference. Result has 180 places, 152 transitions, 2666 flow [2024-05-12 11:06:47,764 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} [2024-05-12 11:06:47,766 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 145 predicate places. [2024-05-12 11:06:47,766 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 152 transitions, 2666 flow [2024-05-12 11:06:47,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 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) [2024-05-12 11:06:47,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:06:47,767 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:06:47,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-05-12 11:06:47,767 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)] === [2024-05-12 11:06:47,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:06:47,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1037735499, now seen corresponding path program 3 times [2024-05-12 11:06:47,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:06:47,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659664784] [2024-05-12 11:06:47,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:06:47,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:06:47,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:06:48,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:06:48,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:06:48,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659664784] [2024-05-12 11:06:48,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659664784] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 11:06:48,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 11:06:48,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 11:06:48,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995696908] [2024-05-12 11:06:48,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 11:06:48,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 11:06:48,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:06:48,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 11:06:48,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-05-12 11:06:48,198 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-05-12 11:06:48,198 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 152 transitions, 2666 flow. Second operand has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 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) [2024-05-12 11:06:48,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:06:48,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-05-12 11:06:48,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:06:48,598 INFO L124 PetriNetUnfolderBase]: 1099/1860 cut-off events. [2024-05-12 11:06:48,598 INFO L125 PetriNetUnfolderBase]: For 58599/58599 co-relation queries the response was YES. [2024-05-12 11:06:48,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12316 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 10135 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. [2024-05-12 11:06:48,613 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 108 selfloop transitions, 82 changer transitions 0/196 dead transitions. [2024-05-12 11:06:48,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 196 transitions, 3327 flow [2024-05-12 11:06:48,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 11:06:48,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 11:06:48,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 181 transitions. [2024-05-12 11:06:48,614 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4839572192513369 [2024-05-12 11:06:48,614 INFO L175 Difference]: Start difference. First operand has 180 places, 152 transitions, 2666 flow. Second operand 11 states and 181 transitions. [2024-05-12 11:06:48,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 196 transitions, 3327 flow [2024-05-12 11:06:48,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 196 transitions, 3184 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-05-12 11:06:48,707 INFO L231 Difference]: Finished difference. Result has 185 places, 153 transitions, 2720 flow [2024-05-12 11:06:48,707 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} [2024-05-12 11:06:48,708 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 150 predicate places. [2024-05-12 11:06:48,708 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 153 transitions, 2720 flow [2024-05-12 11:06:48,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 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) [2024-05-12 11:06:48,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:06:48,708 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:06:48,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-05-12 11:06:48,709 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)] === [2024-05-12 11:06:48,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:06:48,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1037730849, now seen corresponding path program 4 times [2024-05-12 11:06:48,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:06:48,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657125191] [2024-05-12 11:06:48,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:06:48,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:06:48,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:06:49,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:06:49,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:06:49,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657125191] [2024-05-12 11:06:49,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657125191] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 11:06:49,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 11:06:49,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 11:06:49,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097271997] [2024-05-12 11:06:49,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 11:06:49,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 11:06:49,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:06:49,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 11:06:49,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-05-12 11:06:49,155 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-05-12 11:06:49,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 153 transitions, 2720 flow. Second operand has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 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) [2024-05-12 11:06:49,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:06:49,156 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-05-12 11:06:49,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:06:49,515 INFO L124 PetriNetUnfolderBase]: 1153/1947 cut-off events. [2024-05-12 11:06:49,515 INFO L125 PetriNetUnfolderBase]: For 62521/62526 co-relation queries the response was YES. [2024-05-12 11:06:49,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12860 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 10698 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. [2024-05-12 11:06:49,530 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 108 selfloop transitions, 83 changer transitions 0/197 dead transitions. [2024-05-12 11:06:49,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 197 transitions, 3427 flow [2024-05-12 11:06:49,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 11:06:49,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 11:06:49,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 181 transitions. [2024-05-12 11:06:49,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4839572192513369 [2024-05-12 11:06:49,531 INFO L175 Difference]: Start difference. First operand has 185 places, 153 transitions, 2720 flow. Second operand 11 states and 181 transitions. [2024-05-12 11:06:49,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 197 transitions, 3427 flow [2024-05-12 11:06:49,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 197 transitions, 3249 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-05-12 11:06:49,642 INFO L231 Difference]: Finished difference. Result has 186 places, 154 transitions, 2741 flow [2024-05-12 11:06:49,642 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} [2024-05-12 11:06:49,642 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 151 predicate places. [2024-05-12 11:06:49,642 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 154 transitions, 2741 flow [2024-05-12 11:06:49,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 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) [2024-05-12 11:06:49,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:06:49,643 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:06:49,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-05-12 11:06:49,643 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)] === [2024-05-12 11:06:49,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:06:49,647 INFO L85 PathProgramCache]: Analyzing trace with hash 1881739229, now seen corresponding path program 5 times [2024-05-12 11:06:49,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:06:49,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729442146] [2024-05-12 11:06:49,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:06:49,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:06:49,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:06:49,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:06:49,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:06:49,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729442146] [2024-05-12 11:06:49,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729442146] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 11:06:49,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 11:06:49,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 11:06:49,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347654130] [2024-05-12 11:06:49,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 11:06:49,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 11:06:49,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:06:49,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 11:06:49,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-05-12 11:06:49,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-05-12 11:06:49,904 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 154 transitions, 2741 flow. Second operand has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 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) [2024-05-12 11:06:49,904 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:06:49,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-05-12 11:06:49,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:06:50,286 INFO L124 PetriNetUnfolderBase]: 1207/2037 cut-off events. [2024-05-12 11:06:50,287 INFO L125 PetriNetUnfolderBase]: For 66993/66998 co-relation queries the response was YES. [2024-05-12 11:06:50,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13380 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 11318 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. [2024-05-12 11:06:50,303 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 110 selfloop transitions, 79 changer transitions 0/195 dead transitions. [2024-05-12 11:06:50,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 195 transitions, 3436 flow [2024-05-12 11:06:50,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 11:06:50,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 11:06:50,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 177 transitions. [2024-05-12 11:06:50,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4732620320855615 [2024-05-12 11:06:50,305 INFO L175 Difference]: Start difference. First operand has 186 places, 154 transitions, 2741 flow. Second operand 11 states and 177 transitions. [2024-05-12 11:06:50,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 195 transitions, 3436 flow [2024-05-12 11:06:50,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 195 transitions, 3272 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-05-12 11:06:50,415 INFO L231 Difference]: Finished difference. Result has 189 places, 155 transitions, 2768 flow [2024-05-12 11:06:50,416 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} [2024-05-12 11:06:50,417 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 154 predicate places. [2024-05-12 11:06:50,417 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 155 transitions, 2768 flow [2024-05-12 11:06:50,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 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) [2024-05-12 11:06:50,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:06:50,417 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:06:50,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-05-12 11:06:50,417 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)] === [2024-05-12 11:06:50,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:06:50,418 INFO L85 PathProgramCache]: Analyzing trace with hash 1879836449, now seen corresponding path program 6 times [2024-05-12 11:06:50,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:06:50,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904618555] [2024-05-12 11:06:50,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:06:50,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:06:50,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:06:50,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:06:50,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:06:50,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904618555] [2024-05-12 11:06:50,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904618555] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 11:06:50,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 11:06:50,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 11:06:50,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155658578] [2024-05-12 11:06:50,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 11:06:50,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 11:06:50,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:06:50,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 11:06:50,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-05-12 11:06:50,753 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-05-12 11:06:50,753 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 155 transitions, 2768 flow. Second operand has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 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) [2024-05-12 11:06:50,753 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:06:50,753 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-05-12 11:06:50,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:06:51,132 INFO L124 PetriNetUnfolderBase]: 1261/2127 cut-off events. [2024-05-12 11:06:51,132 INFO L125 PetriNetUnfolderBase]: For 72476/72476 co-relation queries the response was YES. [2024-05-12 11:06:51,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13897 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 11954 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. [2024-05-12 11:06:51,149 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 114 selfloop transitions, 79 changer transitions 0/199 dead transitions. [2024-05-12 11:06:51,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 199 transitions, 3533 flow [2024-05-12 11:06:51,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 11:06:51,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 11:06:51,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 179 transitions. [2024-05-12 11:06:51,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4786096256684492 [2024-05-12 11:06:51,151 INFO L175 Difference]: Start difference. First operand has 189 places, 155 transitions, 2768 flow. Second operand 11 states and 179 transitions. [2024-05-12 11:06:51,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 199 transitions, 3533 flow [2024-05-12 11:06:51,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 199 transitions, 3381 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-05-12 11:06:51,261 INFO L231 Difference]: Finished difference. Result has 193 places, 156 transitions, 2807 flow [2024-05-12 11:06:51,261 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} [2024-05-12 11:06:51,261 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 158 predicate places. [2024-05-12 11:06:51,261 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 156 transitions, 2807 flow [2024-05-12 11:06:51,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 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) [2024-05-12 11:06:51,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:06:51,262 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:06:51,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-05-12 11:06:51,262 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)] === [2024-05-12 11:06:51,262 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:06:51,262 INFO L85 PathProgramCache]: Analyzing trace with hash 1964266123, now seen corresponding path program 7 times [2024-05-12 11:06:51,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:06:51,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860379347] [2024-05-12 11:06:51,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:06:51,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:06:51,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:06:51,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:06:51,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:06:51,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860379347] [2024-05-12 11:06:51,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860379347] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 11:06:51,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 11:06:51,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 11:06:51,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719614979] [2024-05-12 11:06:51,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 11:06:51,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 11:06:51,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:06:51,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 11:06:51,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-05-12 11:06:51,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-05-12 11:06:51,579 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 156 transitions, 2807 flow. Second operand has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 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) [2024-05-12 11:06:51,579 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:06:51,579 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-05-12 11:06:51,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:06:52,005 INFO L124 PetriNetUnfolderBase]: 1315/2217 cut-off events. [2024-05-12 11:06:52,010 INFO L125 PetriNetUnfolderBase]: For 77949/77949 co-relation queries the response was YES. [2024-05-12 11:06:52,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14438 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 12601 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. [2024-05-12 11:06:52,042 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 110 selfloop transitions, 81 changer transitions 0/197 dead transitions. [2024-05-12 11:06:52,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 197 transitions, 3462 flow [2024-05-12 11:06:52,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 11:06:52,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 11:06:52,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 177 transitions. [2024-05-12 11:06:52,044 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4732620320855615 [2024-05-12 11:06:52,044 INFO L175 Difference]: Start difference. First operand has 193 places, 156 transitions, 2807 flow. Second operand 11 states and 177 transitions. [2024-05-12 11:06:52,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 197 transitions, 3462 flow [2024-05-12 11:06:52,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 197 transitions, 3302 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-05-12 11:06:52,177 INFO L231 Difference]: Finished difference. Result has 195 places, 157 transitions, 2842 flow [2024-05-12 11:06:52,177 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} [2024-05-12 11:06:52,179 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 160 predicate places. [2024-05-12 11:06:52,179 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 157 transitions, 2842 flow [2024-05-12 11:06:52,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 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) [2024-05-12 11:06:52,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:06:52,180 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:06:52,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-05-12 11:06:52,180 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)] === [2024-05-12 11:06:52,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:06:52,182 INFO L85 PathProgramCache]: Analyzing trace with hash -2132120133, now seen corresponding path program 8 times [2024-05-12 11:06:52,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:06:52,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934447963] [2024-05-12 11:06:52,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:06:52,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:06:52,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:06:52,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:06:52,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:06:52,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934447963] [2024-05-12 11:06:52,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934447963] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 11:06:52,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 11:06:52,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 11:06:52,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871884536] [2024-05-12 11:06:52,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 11:06:52,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 11:06:52,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:06:52,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 11:06:52,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-05-12 11:06:52,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-05-12 11:06:52,569 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 157 transitions, 2842 flow. Second operand has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 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) [2024-05-12 11:06:52,570 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:06:52,570 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-05-12 11:06:52,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:06:52,973 INFO L124 PetriNetUnfolderBase]: 1369/2307 cut-off events. [2024-05-12 11:06:52,974 INFO L125 PetriNetUnfolderBase]: For 81661/81666 co-relation queries the response was YES. [2024-05-12 11:06:52,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14967 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 13263 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. [2024-05-12 11:06:52,993 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 116 selfloop transitions, 79 changer transitions 0/201 dead transitions. [2024-05-12 11:06:52,993 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 201 transitions, 3523 flow [2024-05-12 11:06:52,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 11:06:52,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 11:06:52,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 179 transitions. [2024-05-12 11:06:52,994 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4786096256684492 [2024-05-12 11:06:52,994 INFO L175 Difference]: Start difference. First operand has 195 places, 157 transitions, 2842 flow. Second operand 11 states and 179 transitions. [2024-05-12 11:06:52,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 201 transitions, 3523 flow [2024-05-12 11:06:53,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 201 transitions, 3359 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-05-12 11:06:53,138 INFO L231 Difference]: Finished difference. Result has 197 places, 158 transitions, 2869 flow [2024-05-12 11:06:53,138 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} [2024-05-12 11:06:53,138 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 162 predicate places. [2024-05-12 11:06:53,138 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 158 transitions, 2869 flow [2024-05-12 11:06:53,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 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) [2024-05-12 11:06:53,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:06:53,139 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:06:53,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-05-12 11:06:53,139 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)] === [2024-05-12 11:06:53,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:06:53,139 INFO L85 PathProgramCache]: Analyzing trace with hash -2132297763, now seen corresponding path program 9 times [2024-05-12 11:06:53,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:06:53,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102877763] [2024-05-12 11:06:53,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:06:53,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:06:53,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:06:53,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:06:53,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:06:53,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102877763] [2024-05-12 11:06:53,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102877763] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 11:06:53,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 11:06:53,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 11:06:53,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851933152] [2024-05-12 11:06:53,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 11:06:53,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 11:06:53,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:06:53,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 11:06:53,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-05-12 11:06:53,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-05-12 11:06:53,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 158 transitions, 2869 flow. Second operand has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 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) [2024-05-12 11:06:53,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:06:53,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-05-12 11:06:53,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:06:53,971 INFO L124 PetriNetUnfolderBase]: 1423/2397 cut-off events. [2024-05-12 11:06:53,971 INFO L125 PetriNetUnfolderBase]: For 86372/86377 co-relation queries the response was YES. [2024-05-12 11:06:53,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15490 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 13901 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. [2024-05-12 11:06:53,991 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 111 selfloop transitions, 82 changer transitions 0/199 dead transitions. [2024-05-12 11:06:53,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 199 transitions, 3572 flow [2024-05-12 11:06:53,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 11:06:53,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 11:06:53,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 177 transitions. [2024-05-12 11:06:53,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4732620320855615 [2024-05-12 11:06:53,993 INFO L175 Difference]: Start difference. First operand has 197 places, 158 transitions, 2869 flow. Second operand 11 states and 177 transitions. [2024-05-12 11:06:53,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 199 transitions, 3572 flow [2024-05-12 11:06:54,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 199 transitions, 3412 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-05-12 11:06:54,135 INFO L231 Difference]: Finished difference. Result has 199 places, 159 transitions, 2906 flow [2024-05-12 11:06:54,135 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} [2024-05-12 11:06:54,135 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 164 predicate places. [2024-05-12 11:06:54,135 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 159 transitions, 2906 flow [2024-05-12 11:06:54,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 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) [2024-05-12 11:06:54,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:06:54,136 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:06:54,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-05-12 11:06:54,136 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)] === [2024-05-12 11:06:54,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:06:54,136 INFO L85 PathProgramCache]: Analyzing trace with hash -2132293113, now seen corresponding path program 10 times [2024-05-12 11:06:54,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:06:54,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881570461] [2024-05-12 11:06:54,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:06:54,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:06:54,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:06:54,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:06:54,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:06:54,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881570461] [2024-05-12 11:06:54,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881570461] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 11:06:54,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 11:06:54,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 11:06:54,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846744064] [2024-05-12 11:06:54,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 11:06:54,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 11:06:54,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:06:54,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 11:06:54,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-05-12 11:06:54,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-05-12 11:06:54,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 159 transitions, 2906 flow. Second operand has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 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) [2024-05-12 11:06:54,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:06:54,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-05-12 11:06:54,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:06:54,910 INFO L124 PetriNetUnfolderBase]: 1477/2487 cut-off events. [2024-05-12 11:06:54,910 INFO L125 PetriNetUnfolderBase]: For 91994/91994 co-relation queries the response was YES. [2024-05-12 11:06:54,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16028 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 14612 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. [2024-05-12 11:06:54,931 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 111 selfloop transitions, 83 changer transitions 0/200 dead transitions. [2024-05-12 11:06:54,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 200 transitions, 3567 flow [2024-05-12 11:06:54,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 11:06:54,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 11:06:54,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 177 transitions. [2024-05-12 11:06:54,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4732620320855615 [2024-05-12 11:06:54,933 INFO L175 Difference]: Start difference. First operand has 199 places, 159 transitions, 2906 flow. Second operand 11 states and 177 transitions. [2024-05-12 11:06:54,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 200 transitions, 3567 flow [2024-05-12 11:06:55,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 200 transitions, 3404 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-05-12 11:06:55,103 INFO L231 Difference]: Finished difference. Result has 202 places, 160 transitions, 2942 flow [2024-05-12 11:06:55,104 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} [2024-05-12 11:06:55,104 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 167 predicate places. [2024-05-12 11:06:55,104 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 160 transitions, 2942 flow [2024-05-12 11:06:55,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 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) [2024-05-12 11:06:55,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:06:55,105 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:06:55,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-05-12 11:06:55,106 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)] === [2024-05-12 11:06:55,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:06:55,106 INFO L85 PathProgramCache]: Analyzing trace with hash -1859552471, now seen corresponding path program 11 times [2024-05-12 11:06:55,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:06:55,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938696274] [2024-05-12 11:06:55,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:06:55,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:06:55,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:06:55,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:06:55,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:06:55,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938696274] [2024-05-12 11:06:55,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938696274] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 11:06:55,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 11:06:55,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 11:06:55,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201504120] [2024-05-12 11:06:55,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 11:06:55,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 11:06:55,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:06:55,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 11:06:55,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-05-12 11:06:55,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-05-12 11:06:55,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 160 transitions, 2942 flow. Second operand has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 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) [2024-05-12 11:06:55,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:06:55,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-05-12 11:06:55,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:06:55,858 INFO L124 PetriNetUnfolderBase]: 1531/2573 cut-off events. [2024-05-12 11:06:55,858 INFO L125 PetriNetUnfolderBase]: For 95789/95795 co-relation queries the response was YES. [2024-05-12 11:06:55,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16559 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 15211 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. [2024-05-12 11:06:55,880 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 113 selfloop transitions, 82 changer transitions 0/201 dead transitions. [2024-05-12 11:06:55,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 201 transitions, 3615 flow [2024-05-12 11:06:55,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 11:06:55,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 11:06:55,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 176 transitions. [2024-05-12 11:06:55,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47058823529411764 [2024-05-12 11:06:55,882 INFO L175 Difference]: Start difference. First operand has 202 places, 160 transitions, 2942 flow. Second operand 11 states and 176 transitions. [2024-05-12 11:06:55,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 201 transitions, 3615 flow [2024-05-12 11:06:56,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 201 transitions, 3447 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-05-12 11:06:56,054 INFO L231 Difference]: Finished difference. Result has 204 places, 161 transitions, 2971 flow [2024-05-12 11:06:56,055 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} [2024-05-12 11:06:56,055 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 169 predicate places. [2024-05-12 11:06:56,055 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 161 transitions, 2971 flow [2024-05-12 11:06:56,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 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) [2024-05-12 11:06:56,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:06:56,055 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:06:56,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-05-12 11:06:56,056 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)] === [2024-05-12 11:06:56,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:06:56,056 INFO L85 PathProgramCache]: Analyzing trace with hash 1591214727, now seen corresponding path program 12 times [2024-05-12 11:06:56,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:06:56,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682252484] [2024-05-12 11:06:56,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:06:56,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:06:56,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:06:56,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:06:56,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:06:56,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682252484] [2024-05-12 11:06:56,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682252484] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 11:06:56,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 11:06:56,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 11:06:56,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746981017] [2024-05-12 11:06:56,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 11:06:56,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 11:06:56,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:06:56,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 11:06:56,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-05-12 11:06:56,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-05-12 11:06:56,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 161 transitions, 2971 flow. Second operand has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 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) [2024-05-12 11:06:56,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:06:56,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-05-12 11:06:56,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:06:56,809 INFO L124 PetriNetUnfolderBase]: 1585/2663 cut-off events. [2024-05-12 11:06:56,810 INFO L125 PetriNetUnfolderBase]: For 100452/100452 co-relation queries the response was YES. [2024-05-12 11:06:56,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17082 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 15926 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. [2024-05-12 11:06:56,831 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 108 selfloop transitions, 85 changer transitions 0/199 dead transitions. [2024-05-12 11:06:56,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 199 transitions, 3666 flow [2024-05-12 11:06:56,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 11:06:56,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 11:06:56,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 174 transitions. [2024-05-12 11:06:56,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46524064171123 [2024-05-12 11:06:56,832 INFO L175 Difference]: Start difference. First operand has 204 places, 161 transitions, 2971 flow. Second operand 11 states and 174 transitions. [2024-05-12 11:06:56,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 199 transitions, 3666 flow [2024-05-12 11:06:56,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 199 transitions, 3500 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-05-12 11:06:56,982 INFO L231 Difference]: Finished difference. Result has 206 places, 162 transitions, 3008 flow [2024-05-12 11:06:56,982 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} [2024-05-12 11:06:56,982 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 171 predicate places. [2024-05-12 11:06:56,982 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 162 transitions, 3008 flow [2024-05-12 11:06:56,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 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) [2024-05-12 11:06:56,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:06:56,983 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:06:56,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-05-12 11:06:56,983 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)] === [2024-05-12 11:06:56,983 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:06:56,983 INFO L85 PathProgramCache]: Analyzing trace with hash 1591219377, now seen corresponding path program 13 times [2024-05-12 11:06:56,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:06:56,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492399112] [2024-05-12 11:06:56,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:06:56,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:06:56,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:06:57,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:06:57,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:06:57,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492399112] [2024-05-12 11:06:57,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492399112] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 11:06:57,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 11:06:57,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 11:06:57,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761616789] [2024-05-12 11:06:57,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 11:06:57,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 11:06:57,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:06:57,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 11:06:57,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-05-12 11:06:57,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-05-12 11:06:57,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 162 transitions, 3008 flow. Second operand has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 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) [2024-05-12 11:06:57,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:06:57,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-05-12 11:06:57,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:06:57,793 INFO L124 PetriNetUnfolderBase]: 1639/2753 cut-off events. [2024-05-12 11:06:57,794 INFO L125 PetriNetUnfolderBase]: For 105155/105161 co-relation queries the response was YES. [2024-05-12 11:06:57,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17620 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 16570 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. [2024-05-12 11:06:57,813 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 108 selfloop transitions, 86 changer transitions 0/200 dead transitions. [2024-05-12 11:06:57,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 200 transitions, 3661 flow [2024-05-12 11:06:57,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 11:06:57,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 11:06:57,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 174 transitions. [2024-05-12 11:06:57,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46524064171123 [2024-05-12 11:06:57,814 INFO L175 Difference]: Start difference. First operand has 206 places, 162 transitions, 3008 flow. Second operand 11 states and 174 transitions. [2024-05-12 11:06:57,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 200 transitions, 3661 flow [2024-05-12 11:06:57,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 200 transitions, 3489 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-05-12 11:06:57,994 INFO L231 Difference]: Finished difference. Result has 208 places, 163 transitions, 3041 flow [2024-05-12 11:06:57,994 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} [2024-05-12 11:06:57,995 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 173 predicate places. [2024-05-12 11:06:57,995 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 163 transitions, 3041 flow [2024-05-12 11:06:57,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 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) [2024-05-12 11:06:57,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:06:57,996 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:06:57,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-05-12 11:06:57,996 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)] === [2024-05-12 11:06:57,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:06:57,996 INFO L85 PathProgramCache]: Analyzing trace with hash 1308381643, now seen corresponding path program 14 times [2024-05-12 11:06:57,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:06:57,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910576173] [2024-05-12 11:06:57,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:06:57,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:06:58,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:06:58,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:06:58,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:06:58,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910576173] [2024-05-12 11:06:58,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910576173] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 11:06:58,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 11:06:58,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 11:06:58,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913378695] [2024-05-12 11:06:58,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 11:06:58,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 11:06:58,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:06:58,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 11:06:58,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-05-12 11:06:58,398 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-05-12 11:06:58,398 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 163 transitions, 3041 flow. Second operand has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 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) [2024-05-12 11:06:58,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:06:58,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-05-12 11:06:58,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:06:58,874 INFO L124 PetriNetUnfolderBase]: 1693/2843 cut-off events. [2024-05-12 11:06:58,874 INFO L125 PetriNetUnfolderBase]: For 108671/108671 co-relation queries the response was YES. [2024-05-12 11:06:58,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18152 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 17237 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. [2024-05-12 11:06:58,898 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 111 selfloop transitions, 87 changer transitions 0/204 dead transitions. [2024-05-12 11:06:58,899 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 204 transitions, 3808 flow [2024-05-12 11:06:58,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 11:06:58,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 11:06:58,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 176 transitions. [2024-05-12 11:06:58,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47058823529411764 [2024-05-12 11:06:58,900 INFO L175 Difference]: Start difference. First operand has 208 places, 163 transitions, 3041 flow. Second operand 11 states and 176 transitions. [2024-05-12 11:06:58,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 204 transitions, 3808 flow [2024-05-12 11:06:59,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 204 transitions, 3637 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-05-12 11:06:59,079 INFO L231 Difference]: Finished difference. Result has 211 places, 164 transitions, 3077 flow [2024-05-12 11:06:59,080 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} [2024-05-12 11:06:59,080 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 176 predicate places. [2024-05-12 11:06:59,080 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 164 transitions, 3077 flow [2024-05-12 11:06:59,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 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) [2024-05-12 11:06:59,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:06:59,081 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:06:59,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-05-12 11:06:59,081 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)] === [2024-05-12 11:06:59,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:06:59,081 INFO L85 PathProgramCache]: Analyzing trace with hash 1310284423, now seen corresponding path program 15 times [2024-05-12 11:06:59,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:06:59,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950578718] [2024-05-12 11:06:59,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:06:59,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:06:59,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:06:59,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:06:59,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:06:59,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950578718] [2024-05-12 11:06:59,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950578718] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 11:06:59,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 11:06:59,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 11:06:59,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356484062] [2024-05-12 11:06:59,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 11:06:59,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 11:06:59,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:06:59,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 11:06:59,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-05-12 11:06:59,427 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-05-12 11:06:59,427 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 164 transitions, 3077 flow. Second operand has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 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) [2024-05-12 11:06:59,427 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:06:59,427 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-05-12 11:06:59,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:06:59,934 INFO L124 PetriNetUnfolderBase]: 1747/2933 cut-off events. [2024-05-12 11:06:59,934 INFO L125 PetriNetUnfolderBase]: For 114549/114549 co-relation queries the response was YES. [2024-05-12 11:06:59,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18693 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 17939 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. [2024-05-12 11:06:59,960 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 107 selfloop transitions, 89 changer transitions 0/202 dead transitions. [2024-05-12 11:06:59,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 202 transitions, 3778 flow [2024-05-12 11:06:59,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 11:06:59,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 11:06:59,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 174 transitions. [2024-05-12 11:06:59,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46524064171123 [2024-05-12 11:06:59,961 INFO L175 Difference]: Start difference. First operand has 211 places, 164 transitions, 3077 flow. Second operand 11 states and 174 transitions. [2024-05-12 11:06:59,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 202 transitions, 3778 flow [2024-05-12 11:07:00,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 202 transitions, 3602 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-05-12 11:07:00,179 INFO L231 Difference]: Finished difference. Result has 213 places, 165 transitions, 3112 flow [2024-05-12 11:07:00,179 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} [2024-05-12 11:07:00,179 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 178 predicate places. [2024-05-12 11:07:00,180 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 165 transitions, 3112 flow [2024-05-12 11:07:00,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 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) [2024-05-12 11:07:00,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:07:00,180 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:07:00,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-05-12 11:07:00,180 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)] === [2024-05-12 11:07:00,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:07:00,181 INFO L85 PathProgramCache]: Analyzing trace with hash 1310289073, now seen corresponding path program 16 times [2024-05-12 11:07:00,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:07:00,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854556559] [2024-05-12 11:07:00,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:07:00,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:07:00,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:07:00,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:07:00,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:07:00,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854556559] [2024-05-12 11:07:00,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854556559] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 11:07:00,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 11:07:00,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 11:07:00,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140372343] [2024-05-12 11:07:00,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 11:07:00,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 11:07:00,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:07:00,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 11:07:00,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-05-12 11:07:00,457 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-05-12 11:07:00,458 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 165 transitions, 3112 flow. Second operand has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 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) [2024-05-12 11:07:00,458 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:07:00,458 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-05-12 11:07:00,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:07:00,985 INFO L124 PetriNetUnfolderBase]: 1801/3023 cut-off events. [2024-05-12 11:07:00,985 INFO L125 PetriNetUnfolderBase]: For 120542/120548 co-relation queries the response was YES. [2024-05-12 11:07:00,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19222 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 18640 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. [2024-05-12 11:07:01,007 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 107 selfloop transitions, 90 changer transitions 0/203 dead transitions. [2024-05-12 11:07:01,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 203 transitions, 3771 flow [2024-05-12 11:07:01,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 11:07:01,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 11:07:01,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 174 transitions. [2024-05-12 11:07:01,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46524064171123 [2024-05-12 11:07:01,009 INFO L175 Difference]: Start difference. First operand has 213 places, 165 transitions, 3112 flow. Second operand 11 states and 174 transitions. [2024-05-12 11:07:01,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 203 transitions, 3771 flow [2024-05-12 11:07:01,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 203 transitions, 3594 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-05-12 11:07:01,219 INFO L231 Difference]: Finished difference. Result has 216 places, 166 transitions, 3148 flow [2024-05-12 11:07:01,219 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} [2024-05-12 11:07:01,219 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 181 predicate places. [2024-05-12 11:07:01,219 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 166 transitions, 3148 flow [2024-05-12 11:07:01,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 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) [2024-05-12 11:07:01,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:07:01,220 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:07:01,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-05-12 11:07:01,220 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)] === [2024-05-12 11:07:01,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:07:01,220 INFO L85 PathProgramCache]: Analyzing trace with hash 716476473, now seen corresponding path program 17 times [2024-05-12 11:07:01,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:07:01,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223253230] [2024-05-12 11:07:01,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:07:01,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:07:01,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:07:01,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:07:01,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:07:01,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223253230] [2024-05-12 11:07:01,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223253230] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 11:07:01,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 11:07:01,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 11:07:01,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109720156] [2024-05-12 11:07:01,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 11:07:01,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 11:07:01,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:07:01,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 11:07:01,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-05-12 11:07:01,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-05-12 11:07:01,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 166 transitions, 3148 flow. Second operand has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 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) [2024-05-12 11:07:01,512 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:07:01,512 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-05-12 11:07:01,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:07:02,032 INFO L124 PetriNetUnfolderBase]: 1855/3113 cut-off events. [2024-05-12 11:07:02,032 INFO L125 PetriNetUnfolderBase]: For 125466/125472 co-relation queries the response was YES. [2024-05-12 11:07:02,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19757 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 19347 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. [2024-05-12 11:07:02,059 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 110 selfloop transitions, 91 changer transitions 0/207 dead transitions. [2024-05-12 11:07:02,059 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 207 transitions, 3833 flow [2024-05-12 11:07:02,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 11:07:02,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 11:07:02,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 177 transitions. [2024-05-12 11:07:02,060 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4732620320855615 [2024-05-12 11:07:02,060 INFO L175 Difference]: Start difference. First operand has 216 places, 166 transitions, 3148 flow. Second operand 11 states and 177 transitions. [2024-05-12 11:07:02,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 207 transitions, 3833 flow [2024-05-12 11:07:02,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 207 transitions, 3651 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-05-12 11:07:02,291 INFO L231 Difference]: Finished difference. Result has 218 places, 167 transitions, 3181 flow [2024-05-12 11:07:02,292 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} [2024-05-12 11:07:02,292 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 183 predicate places. [2024-05-12 11:07:02,292 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 167 transitions, 3181 flow [2024-05-12 11:07:02,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 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) [2024-05-12 11:07:02,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:07:02,293 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:07:02,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-05-12 11:07:02,293 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)] === [2024-05-12 11:07:02,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:07:02,293 INFO L85 PathProgramCache]: Analyzing trace with hash 709153653, now seen corresponding path program 18 times [2024-05-12 11:07:02,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:07:02,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234300423] [2024-05-12 11:07:02,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:07:02,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:07:02,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:07:02,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:07:02,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:07:02,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234300423] [2024-05-12 11:07:02,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234300423] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 11:07:02,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 11:07:02,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 11:07:02,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563669231] [2024-05-12 11:07:02,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 11:07:02,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 11:07:02,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:07:02,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 11:07:02,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-05-12 11:07:02,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-05-12 11:07:02,591 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 167 transitions, 3181 flow. Second operand has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 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) [2024-05-12 11:07:02,591 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:07:02,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-05-12 11:07:02,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:07:03,173 INFO L124 PetriNetUnfolderBase]: 1909/3203 cut-off events. [2024-05-12 11:07:03,174 INFO L125 PetriNetUnfolderBase]: For 130317/130323 co-relation queries the response was YES. [2024-05-12 11:07:03,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20289 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 20029 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. [2024-05-12 11:07:03,204 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 105 selfloop transitions, 94 changer transitions 0/205 dead transitions. [2024-05-12 11:07:03,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 205 transitions, 3844 flow [2024-05-12 11:07:03,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 11:07:03,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 11:07:03,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 175 transitions. [2024-05-12 11:07:03,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4679144385026738 [2024-05-12 11:07:03,206 INFO L175 Difference]: Start difference. First operand has 218 places, 167 transitions, 3181 flow. Second operand 11 states and 175 transitions. [2024-05-12 11:07:03,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 205 transitions, 3844 flow [2024-05-12 11:07:03,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 205 transitions, 3660 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-05-12 11:07:03,437 INFO L231 Difference]: Finished difference. Result has 220 places, 168 transitions, 3218 flow [2024-05-12 11:07:03,437 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} [2024-05-12 11:07:03,437 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 185 predicate places. [2024-05-12 11:07:03,438 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 168 transitions, 3218 flow [2024-05-12 11:07:03,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 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) [2024-05-12 11:07:03,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:07:03,438 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:07:03,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-05-12 11:07:03,438 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)] === [2024-05-12 11:07:03,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:07:03,439 INFO L85 PathProgramCache]: Analyzing trace with hash 965827143, now seen corresponding path program 19 times [2024-05-12 11:07:03,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:07:03,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357060354] [2024-05-12 11:07:03,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:07:03,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:07:03,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:07:03,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:07:03,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:07:03,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357060354] [2024-05-12 11:07:03,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357060354] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 11:07:03,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 11:07:03,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 11:07:03,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836506403] [2024-05-12 11:07:03,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 11:07:03,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 11:07:03,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:07:03,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 11:07:03,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-05-12 11:07:03,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-05-12 11:07:03,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 168 transitions, 3218 flow. Second operand has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 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) [2024-05-12 11:07:03,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:07:03,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-05-12 11:07:03,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:07:04,260 INFO L124 PetriNetUnfolderBase]: 1963/3296 cut-off events. [2024-05-12 11:07:04,261 INFO L125 PetriNetUnfolderBase]: For 133921/133927 co-relation queries the response was YES. [2024-05-12 11:07:04,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20830 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 20716 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. [2024-05-12 11:07:04,290 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 108 selfloop transitions, 93 changer transitions 0/207 dead transitions. [2024-05-12 11:07:04,290 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 207 transitions, 3899 flow [2024-05-12 11:07:04,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 11:07:04,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 11:07:04,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 172 transitions. [2024-05-12 11:07:04,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45989304812834225 [2024-05-12 11:07:04,291 INFO L175 Difference]: Start difference. First operand has 220 places, 168 transitions, 3218 flow. Second operand 11 states and 172 transitions. [2024-05-12 11:07:04,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 207 transitions, 3899 flow [2024-05-12 11:07:04,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 207 transitions, 3709 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-05-12 11:07:04,552 INFO L231 Difference]: Finished difference. Result has 222 places, 169 transitions, 3247 flow [2024-05-12 11:07:04,552 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} [2024-05-12 11:07:04,553 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 187 predicate places. [2024-05-12 11:07:04,553 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 169 transitions, 3247 flow [2024-05-12 11:07:04,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 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) [2024-05-12 11:07:04,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:07:04,553 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:07:04,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-05-12 11:07:04,553 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)] === [2024-05-12 11:07:04,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:07:04,554 INFO L85 PathProgramCache]: Analyzing trace with hash 709149003, now seen corresponding path program 20 times [2024-05-12 11:07:04,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:07:04,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597559014] [2024-05-12 11:07:04,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:07:04,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:07:04,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:07:04,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:07:04,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:07:04,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597559014] [2024-05-12 11:07:04,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597559014] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 11:07:04,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 11:07:04,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 11:07:04,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563554611] [2024-05-12 11:07:04,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 11:07:04,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 11:07:04,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:07:04,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 11:07:04,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-05-12 11:07:04,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-05-12 11:07:04,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 169 transitions, 3247 flow. Second operand has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 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) [2024-05-12 11:07:04,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:07:04,843 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-05-12 11:07:04,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:07:05,453 INFO L124 PetriNetUnfolderBase]: 1945/3266 cut-off events. [2024-05-12 11:07:05,453 INFO L125 PetriNetUnfolderBase]: For 123664/123670 co-relation queries the response was YES. [2024-05-12 11:07:05,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20240 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 20572 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. [2024-05-12 11:07:05,485 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 104 selfloop transitions, 95 changer transitions 0/205 dead transitions. [2024-05-12 11:07:05,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 205 transitions, 3823 flow [2024-05-12 11:07:05,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 11:07:05,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 11:07:05,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 174 transitions. [2024-05-12 11:07:05,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46524064171123 [2024-05-12 11:07:05,488 INFO L175 Difference]: Start difference. First operand has 222 places, 169 transitions, 3247 flow. Second operand 11 states and 174 transitions. [2024-05-12 11:07:05,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 205 transitions, 3823 flow [2024-05-12 11:07:05,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 205 transitions, 3542 flow, removed 0 selfloop flow, removed 40 redundant places. [2024-05-12 11:07:05,710 INFO L231 Difference]: Finished difference. Result has 191 places, 168 transitions, 3054 flow [2024-05-12 11:07:05,710 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} [2024-05-12 11:07:05,711 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 156 predicate places. [2024-05-12 11:07:05,711 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 168 transitions, 3054 flow [2024-05-12 11:07:05,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 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) [2024-05-12 11:07:05,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:07:05,712 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:07:05,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-05-12 11:07:05,712 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)] === [2024-05-12 11:07:05,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:07:05,713 INFO L85 PathProgramCache]: Analyzing trace with hash 1016726273, now seen corresponding path program 2 times [2024-05-12 11:07:05,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:07:05,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740992608] [2024-05-12 11:07:05,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:07:05,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:07:05,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:07:05,756 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:07:05,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:07:05,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740992608] [2024-05-12 11:07:05,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740992608] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 11:07:05,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133372973] [2024-05-12 11:07:05,757 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-05-12 11:07:05,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 11:07:05,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 11:07:05,758 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) [2024-05-12 11:07:05,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-05-12 11:07:05,861 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-05-12 11:07:05,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-05-12 11:07:05,862 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 6 conjunts are in the unsatisfiable core [2024-05-12 11:07:05,863 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 11:07:05,873 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:07:05,874 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 11:07:05,913 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:07:05,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133372973] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 11:07:05,914 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 11:07:05,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-05-12 11:07:05,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058208270] [2024-05-12 11:07:05,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 11:07:05,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-05-12 11:07:05,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:07:05,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-05-12 11:07:05,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-05-12 11:07:05,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 34 [2024-05-12 11:07:05,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 168 transitions, 3054 flow. Second operand has 13 states, 13 states have (on average 15.76923076923077) internal successors, (205), 13 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:07:05,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:07:05,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 34 [2024-05-12 11:07:05,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:07:06,315 INFO L124 PetriNetUnfolderBase]: 1540/2812 cut-off events. [2024-05-12 11:07:06,316 INFO L125 PetriNetUnfolderBase]: For 100162/100454 co-relation queries the response was YES. [2024-05-12 11:07:06,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17939 conditions, 2812 events. 1540/2812 cut-off events. For 100162/100454 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 18283 event pairs, 638 based on Foata normal form. 105/2775 useless extension candidates. Maximal degree in co-relation 17846. Up to 1417 conditions per place. [2024-05-12 11:07:06,342 INFO L140 encePairwiseOnDemand]: 31/34 looper letters, 123 selfloop transitions, 79 changer transitions 0/232 dead transitions. [2024-05-12 11:07:06,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 232 transitions, 4278 flow [2024-05-12 11:07:06,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-05-12 11:07:06,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-05-12 11:07:06,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 262 transitions. [2024-05-12 11:07:06,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6421568627450981 [2024-05-12 11:07:06,343 INFO L175 Difference]: Start difference. First operand has 191 places, 168 transitions, 3054 flow. Second operand 12 states and 262 transitions. [2024-05-12 11:07:06,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 232 transitions, 4278 flow [2024-05-12 11:07:06,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 232 transitions, 3261 flow, removed 0 selfloop flow, removed 22 redundant places. [2024-05-12 11:07:06,516 INFO L231 Difference]: Finished difference. Result has 186 places, 174 transitions, 2257 flow [2024-05-12 11:07:06,516 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} [2024-05-12 11:07:06,517 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 151 predicate places. [2024-05-12 11:07:06,517 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 174 transitions, 2257 flow [2024-05-12 11:07:06,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 15.76923076923077) internal successors, (205), 13 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:07:06,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:07:06,517 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:07:06,528 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-05-12 11:07:06,722 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 [2024-05-12 11:07:06,722 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)] === [2024-05-12 11:07:06,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:07:06,723 INFO L85 PathProgramCache]: Analyzing trace with hash 547116289, now seen corresponding path program 3 times [2024-05-12 11:07:06,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:07:06,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758272548] [2024-05-12 11:07:06,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:07:06,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:07:06,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:07:06,821 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:07:06,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:07:06,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758272548] [2024-05-12 11:07:06,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758272548] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 11:07:06,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895256270] [2024-05-12 11:07:06,821 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-05-12 11:07:06,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 11:07:06,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 11:07:06,822 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) [2024-05-12 11:07:06,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-05-12 11:07:06,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-05-12 11:07:06,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-05-12 11:07:06,905 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 12 conjunts are in the unsatisfiable core [2024-05-12 11:07:06,906 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 11:07:06,921 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:07:06,922 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 11:07:07,079 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:07:07,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895256270] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 11:07:07,080 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 11:07:07,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2024-05-12 11:07:07,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837084385] [2024-05-12 11:07:07,080 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 11:07:07,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-05-12 11:07:07,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:07:07,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-05-12 11:07:07,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2024-05-12 11:07:07,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 34 [2024-05-12 11:07:07,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 174 transitions, 2257 flow. Second operand has 25 states, 25 states have (on average 15.4) internal successors, (385), 25 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:07:07,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:07:07,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 34 [2024-05-12 11:07:07,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:07:07,603 INFO L124 PetriNetUnfolderBase]: 1828/3280 cut-off events. [2024-05-12 11:07:07,603 INFO L125 PetriNetUnfolderBase]: For 92869/93173 co-relation queries the response was YES. [2024-05-12 11:07:07,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20655 conditions, 3280 events. 1828/3280 cut-off events. For 92869/93173 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 19797 event pairs, 638 based on Foata normal form. 195/3321 useless extension candidates. Maximal degree in co-relation 20571. Up to 1417 conditions per place. [2024-05-12 11:07:07,650 INFO L140 encePairwiseOnDemand]: 31/34 looper letters, 195 selfloop transitions, 91 changer transitions 0/316 dead transitions. [2024-05-12 11:07:07,651 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 316 transitions, 4669 flow [2024-05-12 11:07:07,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-05-12 11:07:07,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-05-12 11:07:07,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 520 transitions. [2024-05-12 11:07:07,652 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6372549019607843 [2024-05-12 11:07:07,652 INFO L175 Difference]: Start difference. First operand has 186 places, 174 transitions, 2257 flow. Second operand 24 states and 520 transitions. [2024-05-12 11:07:07,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 316 transitions, 4669 flow [2024-05-12 11:07:07,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 316 transitions, 4436 flow, removed 25 selfloop flow, removed 13 redundant places. [2024-05-12 11:07:07,808 INFO L231 Difference]: Finished difference. Result has 208 places, 186 transitions, 2352 flow [2024-05-12 11:07:07,808 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} [2024-05-12 11:07:07,808 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 173 predicate places. [2024-05-12 11:07:07,808 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 186 transitions, 2352 flow [2024-05-12 11:07:07,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 15.4) internal successors, (385), 25 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:07:07,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:07:07,809 INFO L208 CegarLoopForPetriNet]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:07:07,822 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-05-12 11:07:08,020 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 [2024-05-12 11:07:08,021 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)] === [2024-05-12 11:07:08,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:07:08,021 INFO L85 PathProgramCache]: Analyzing trace with hash 590379265, now seen corresponding path program 4 times [2024-05-12 11:07:08,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:07:08,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754507330] [2024-05-12 11:07:08,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:07:08,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:07:08,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:07:09,104 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:07:09,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:07:09,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754507330] [2024-05-12 11:07:09,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754507330] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 11:07:09,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865419518] [2024-05-12 11:07:09,105 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-05-12 11:07:09,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 11:07:09,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 11:07:09,106 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) [2024-05-12 11:07:09,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-05-12 11:07:09,200 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-05-12 11:07:09,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-05-12 11:07:09,203 INFO L262 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 77 conjunts are in the unsatisfiable core [2024-05-12 11:07:09,205 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 11:07:10,480 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 210 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:07:10,480 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 11:07:11,882 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:07:11,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865419518] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 11:07:11,883 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 11:07:11,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 85 [2024-05-12 11:07:11,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825142019] [2024-05-12 11:07:11,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 11:07:11,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2024-05-12 11:07:11,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:07:11,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2024-05-12 11:07:11,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1040, Invalid=6270, Unknown=0, NotChecked=0, Total=7310 [2024-05-12 11:07:13,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2024-05-12 11:07:13,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 186 transitions, 2352 flow. Second operand has 86 states, 86 states have (on average 8.290697674418604) internal successors, (713), 86 states have internal predecessors, (713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:07:13,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:07:13,463 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2024-05-12 11:07:13,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:08:00,849 INFO L124 PetriNetUnfolderBase]: 50059/82375 cut-off events. [2024-05-12 11:08:00,849 INFO L125 PetriNetUnfolderBase]: For 1564640/1564645 co-relation queries the response was YES. [2024-05-12 11:08:01,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 482493 conditions, 82375 events. 50059/82375 cut-off events. For 1564640/1564645 co-relation queries the response was YES. Maximal size of possible extension queue 1118. Compared 615303 event pairs, 483 based on Foata normal form. 0/81880 useless extension candidates. Maximal degree in co-relation 482395. Up to 24160 conditions per place. [2024-05-12 11:08:02,137 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 1168 selfloop transitions, 1996 changer transitions 1053/4220 dead transitions. [2024-05-12 11:08:02,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 4220 transitions, 55413 flow [2024-05-12 11:08:02,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 263 states. [2024-05-12 11:08:02,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 263 states. [2024-05-12 11:08:02,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 4080 transitions. [2024-05-12 11:08:02,142 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45627376425855515 [2024-05-12 11:08:02,142 INFO L175 Difference]: Start difference. First operand has 208 places, 186 transitions, 2352 flow. Second operand 263 states and 4080 transitions. [2024-05-12 11:08:02,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 4220 transitions, 55413 flow [2024-05-12 11:08:05,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 4220 transitions, 50664 flow, removed 1250 selfloop flow, removed 12 redundant places. [2024-05-12 11:08:05,964 INFO L231 Difference]: Finished difference. Result has 560 places, 2182 transitions, 25770 flow [2024-05-12 11:08:05,964 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} [2024-05-12 11:08:05,965 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 525 predicate places. [2024-05-12 11:08:05,965 INFO L495 AbstractCegarLoop]: Abstraction has has 560 places, 2182 transitions, 25770 flow [2024-05-12 11:08:05,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 8.290697674418604) internal successors, (713), 86 states have internal predecessors, (713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:08:05,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:08:05,965 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] [2024-05-12 11:08:05,977 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-05-12 11:08:06,177 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 [2024-05-12 11:08:06,177 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)] === [2024-05-12 11:08:06,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:08:06,178 INFO L85 PathProgramCache]: Analyzing trace with hash -1394706983, now seen corresponding path program 1 times [2024-05-12 11:08:06,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:08:06,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508003496] [2024-05-12 11:08:06,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:08:06,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:08:06,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:08:07,297 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 255 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:08:07,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:08:07,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508003496] [2024-05-12 11:08:07,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508003496] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 11:08:07,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672387436] [2024-05-12 11:08:07,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:08:07,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 11:08:07,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 11:08:07,302 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) [2024-05-12 11:08:07,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-05-12 11:08:07,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:08:07,421 INFO L262 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 79 conjunts are in the unsatisfiable core [2024-05-12 11:08:07,424 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 11:08:08,528 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 210 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:08:08,528 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 11:08:10,004 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 255 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:08:10,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672387436] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 11:08:10,005 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 11:08:10,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 91 [2024-05-12 11:08:10,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410072786] [2024-05-12 11:08:10,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 11:08:10,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2024-05-12 11:08:10,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:08:10,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2024-05-12 11:08:10,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1074, Invalid=7298, Unknown=0, NotChecked=0, Total=8372 [2024-05-12 11:08:11,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2024-05-12 11:08:11,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 560 places, 2182 transitions, 25770 flow. Second operand has 92 states, 92 states have (on average 8.33695652173913) internal successors, (767), 92 states have internal predecessors, (767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:08:11,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:08:11,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2024-05-12 11:08:11,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand