./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-atomic/dekker.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-05-07_14-17-48.files/protection/dekker.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-atomic/dekker.i ./goblint.2024-05-07_14-17-48.files/protection/dekker.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 12:37:46,356 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-05-12 12:37:46,417 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-05-12 12:37:46,423 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-05-12 12:37:46,424 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-05-12 12:37:46,446 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-05-12 12:37:46,450 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-05-12 12:37:46,450 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-05-12 12:37:46,450 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-05-12 12:37:46,455 INFO L153 SettingsManager]: * Use memory slicer=true [2024-05-12 12:37:46,455 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-05-12 12:37:46,455 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-05-12 12:37:46,456 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-05-12 12:37:46,457 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-05-12 12:37:46,458 INFO L153 SettingsManager]: * Use SBE=true [2024-05-12 12:37:46,458 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-05-12 12:37:46,458 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-05-12 12:37:46,458 INFO L153 SettingsManager]: * sizeof long=4 [2024-05-12 12:37:46,459 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-05-12 12:37:46,459 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-05-12 12:37:46,459 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-05-12 12:37:46,459 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-05-12 12:37:46,460 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-05-12 12:37:46,460 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-05-12 12:37:46,460 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-05-12 12:37:46,460 INFO L153 SettingsManager]: * sizeof long double=12 [2024-05-12 12:37:46,461 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-05-12 12:37:46,461 INFO L153 SettingsManager]: * Use constant arrays=true [2024-05-12 12:37:46,461 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-05-12 12:37:46,462 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-05-12 12:37:46,462 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-05-12 12:37:46,463 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-05-12 12:37:46,463 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-05-12 12:37:46,463 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-05-12 12:37:46,463 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-05-12 12:37:46,463 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-05-12 12:37:46,463 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-05-12 12:37:46,464 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-05-12 12:37:46,464 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-05-12 12:37:46,464 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-05-12 12:37:46,464 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-05-12 12:37:46,465 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-05-12 12:37:46,465 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-05-12 12:37:46,465 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-05-12 12:37:46,680 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-05-12 12:37:46,695 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-05-12 12:37:46,697 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-05-12 12:37:46,698 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-05-12 12:37:46,699 INFO L274 PluginConnector]: Witness Parser initialized [2024-05-12 12:37:46,700 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-07_14-17-48.files/protection/dekker.yml/witness.yml [2024-05-12 12:37:46,797 INFO L270 PluginConnector]: Initializing CDTParser... [2024-05-12 12:37:46,797 INFO L274 PluginConnector]: CDTParser initialized [2024-05-12 12:37:46,798 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-atomic/dekker.i [2024-05-12 12:37:47,825 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-05-12 12:37:48,085 INFO L384 CDTParser]: Found 1 translation units. [2024-05-12 12:37:48,089 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-atomic/dekker.i [2024-05-12 12:37:48,107 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ca8590b8/4f141b1787c5429699118fb683d49080/FLAG0c917dcf9 [2024-05-12 12:37:48,124 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ca8590b8/4f141b1787c5429699118fb683d49080 [2024-05-12 12:37:48,125 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-05-12 12:37:48,128 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-05-12 12:37:48,129 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-05-12 12:37:48,129 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-05-12 12:37:48,133 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-05-12 12:37:48,133 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 12:37:46" (1/2) ... [2024-05-12 12:37:48,134 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58e434d2 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:37:48, skipping insertion in model container [2024-05-12 12:37:48,135 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 12:37:46" (1/2) ... [2024-05-12 12:37:48,136 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@74767a0a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:37:48, skipping insertion in model container [2024-05-12 12:37:48,136 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.05 12:37:48" (2/2) ... [2024-05-12 12:37:48,137 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58e434d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 12:37:48, skipping insertion in model container [2024-05-12 12:37:48,137 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.05 12:37:48" (2/2) ... [2024-05-12 12:37:48,137 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-05-12 12:37:48,166 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-05-12 12:37:48,167 INFO L97 edCorrectnessWitness]: Location invariant before [L793-L793] (((! multithreaded || ((0 <= flag1 && flag1 <= 1) && (flag1 == 0 || flag1 == 1))) && (! multithreaded || ((0 <= turn && turn <= 1) && (turn == 0 || turn == 1)))) && (! multithreaded || ((0 <= flag2 && flag2 <= 1) && (flag2 == 0 || flag2 == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1))) [2024-05-12 12:37:48,167 INFO L97 edCorrectnessWitness]: Location invariant before [L794-L794] (((! multithreaded || ((0 <= flag1 && flag1 <= 1) && (flag1 == 0 || flag1 == 1))) && (! multithreaded || ((0 <= turn && turn <= 1) && (turn == 0 || turn == 1)))) && (! multithreaded || ((0 <= flag2 && flag2 <= 1) && (flag2 == 0 || flag2 == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1))) [2024-05-12 12:37:48,167 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-05-12 12:37:48,167 INFO L106 edCorrectnessWitness]: ghost_update [L792-L792] multithreaded = 1; [2024-05-12 12:37:48,203 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-05-12 12:37:48,449 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-atomic/dekker.i[31403,31416] [2024-05-12 12:37:48,470 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-atomic/dekker.i[32483,32496] [2024-05-12 12:37:48,477 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-05-12 12:37:48,491 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local [2024-05-12 12:37:48,602 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-atomic/dekker.i[31403,31416] [2024-05-12 12:37:48,619 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-atomic/dekker.i[32483,32496] Start Parsing Local Start Parsing Local Start Parsing Local [2024-05-12 12:37:48,651 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-05-12 12:37:48,716 INFO L206 MainTranslator]: Completed translation [2024-05-12 12:37:48,716 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 12:37:48 WrapperNode [2024-05-12 12:37:48,717 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-05-12 12:37:48,717 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-05-12 12:37:48,718 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-05-12 12:37:48,718 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-05-12 12:37:48,723 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 12:37:48" (1/1) ... [2024-05-12 12:37:48,731 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 12:37:48" (1/1) ... [2024-05-12 12:37:48,746 INFO L138 Inliner]: procedures = 171, calls = 59, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 51 [2024-05-12 12:37:48,746 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-05-12 12:37:48,747 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-05-12 12:37:48,747 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-05-12 12:37:48,747 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-05-12 12:37:48,757 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 12:37:48" (1/1) ... [2024-05-12 12:37:48,757 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 12:37:48" (1/1) ... [2024-05-12 12:37:48,759 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 12:37:48" (1/1) ... [2024-05-12 12:37:48,769 INFO L175 MemorySlicer]: Split 6 memory accesses to 3 slices as follows [2, 2, 2]. 33 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 12:37:48,770 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 12:37:48" (1/1) ... [2024-05-12 12:37:48,770 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 12:37:48" (1/1) ... [2024-05-12 12:37:48,775 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 12:37:48" (1/1) ... [2024-05-12 12:37:48,777 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 12:37:48" (1/1) ... [2024-05-12 12:37:48,779 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 12:37:48" (1/1) ... [2024-05-12 12:37:48,780 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 12:37:48" (1/1) ... [2024-05-12 12:37:48,782 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-05-12 12:37:48,782 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-05-12 12:37:48,782 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-05-12 12:37:48,782 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-05-12 12:37:48,783 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 12:37:48" (1/1) ... [2024-05-12 12:37:48,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-05-12 12:37:48,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 12:37:48,813 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 12:37:48,834 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 12:37:48,847 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-05-12 12:37:48,847 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-05-12 12:37:48,848 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-05-12 12:37:48,848 INFO L130 BoogieDeclarations]: Found specification of procedure thr2 [2024-05-12 12:37:48,848 INFO L138 BoogieDeclarations]: Found implementation of procedure thr2 [2024-05-12 12:37:48,848 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2024-05-12 12:37:48,848 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2024-05-12 12:37:48,849 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-05-12 12:37:48,849 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-05-12 12:37:48,849 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-05-12 12:37:48,849 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-05-12 12:37:48,849 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-05-12 12:37:48,849 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-05-12 12:37:48,850 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-05-12 12:37:48,850 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-05-12 12:37:48,850 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-05-12 12:37:48,850 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-05-12 12:37:48,850 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-05-12 12:37:48,850 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-05-12 12:37:48,850 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-05-12 12:37:48,852 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 12:37:48,960 INFO L244 CfgBuilder]: Building ICFG [2024-05-12 12:37:48,962 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-05-12 12:37:49,111 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-05-12 12:37:49,112 INFO L293 CfgBuilder]: Performing block encoding [2024-05-12 12:37:49,188 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-05-12 12:37:49,188 INFO L320 CfgBuilder]: Removed 4 assume(true) statements. [2024-05-12 12:37:49,188 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.05 12:37:49 BoogieIcfgContainer [2024-05-12 12:37:49,188 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-05-12 12:37:49,190 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-05-12 12:37:49,190 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-05-12 12:37:49,192 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-05-12 12:37:49,192 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 12:37:46" (1/4) ... [2024-05-12 12:37:49,193 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6874ee6b and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 12.05 12:37:49, skipping insertion in model container [2024-05-12 12:37:49,193 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.05 12:37:48" (2/4) ... [2024-05-12 12:37:49,193 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6874ee6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.05 12:37:49, skipping insertion in model container [2024-05-12 12:37:49,193 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 12:37:48" (3/4) ... [2024-05-12 12:37:49,194 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6874ee6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.05 12:37:49, skipping insertion in model container [2024-05-12 12:37:49,194 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.05 12:37:49" (4/4) ... [2024-05-12 12:37:49,195 INFO L112 eAbstractionObserver]: Analyzing ICFG dekker.i [2024-05-12 12:37:49,208 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-05-12 12:37:49,208 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-05-12 12:37:49,208 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-05-12 12:37:49,240 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-05-12 12:37:49,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 62 places, 63 transitions, 140 flow [2024-05-12 12:37:49,284 INFO L124 PetriNetUnfolderBase]: 8/61 cut-off events. [2024-05-12 12:37:49,284 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-05-12 12:37:49,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70 conditions, 61 events. 8/61 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 156 event pairs, 0 based on Foata normal form. 0/49 useless extension candidates. Maximal degree in co-relation 55. Up to 2 conditions per place. [2024-05-12 12:37:49,287 INFO L82 GeneralOperation]: Start removeDead. Operand has 62 places, 63 transitions, 140 flow [2024-05-12 12:37:49,290 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 58 places, 59 transitions, 127 flow [2024-05-12 12:37:49,296 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-05-12 12:37:49,301 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;@1946bb1f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-05-12 12:37:49,302 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-05-12 12:37:49,305 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-05-12 12:37:49,305 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-05-12 12:37:49,305 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-05-12 12:37:49,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:37:49,306 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-05-12 12:37:49,306 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-05-12 12:37:49,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:37:49,310 INFO L85 PathProgramCache]: Analyzing trace with hash -617990521, now seen corresponding path program 1 times [2024-05-12 12:37:49,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:37:49,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585790605] [2024-05-12 12:37:49,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:37:49,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:37:49,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:37:49,819 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 12:37:49,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:37:49,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585790605] [2024-05-12 12:37:49,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585790605] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:37:49,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:37:49,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-05-12 12:37:49,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966061429] [2024-05-12 12:37:49,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:37:49,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-05-12 12:37:49,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:37:49,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-05-12 12:37:49,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-05-12 12:37:49,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 63 [2024-05-12 12:37:49,910 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 59 transitions, 127 flow. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:37:49,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:37:49,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 63 [2024-05-12 12:37:49,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:37:50,114 INFO L124 PetriNetUnfolderBase]: 614/1530 cut-off events. [2024-05-12 12:37:50,114 INFO L125 PetriNetUnfolderBase]: For 25/25 co-relation queries the response was YES. [2024-05-12 12:37:50,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2319 conditions, 1530 events. 614/1530 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 10125 event pairs, 218 based on Foata normal form. 60/1420 useless extension candidates. Maximal degree in co-relation 2222. Up to 754 conditions per place. [2024-05-12 12:37:50,129 INFO L140 encePairwiseOnDemand]: 56/63 looper letters, 31 selfloop transitions, 3 changer transitions 0/64 dead transitions. [2024-05-12 12:37:50,130 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 64 transitions, 208 flow [2024-05-12 12:37:50,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-05-12 12:37:50,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-05-12 12:37:50,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 134 transitions. [2024-05-12 12:37:50,140 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.708994708994709 [2024-05-12 12:37:50,141 INFO L175 Difference]: Start difference. First operand has 58 places, 59 transitions, 127 flow. Second operand 3 states and 134 transitions. [2024-05-12 12:37:50,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 64 transitions, 208 flow [2024-05-12 12:37:50,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 64 transitions, 202 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-05-12 12:37:50,149 INFO L231 Difference]: Finished difference. Result has 58 places, 59 transitions, 139 flow [2024-05-12 12:37:50,151 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=139, PETRI_PLACES=58, PETRI_TRANSITIONS=59} [2024-05-12 12:37:50,155 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 0 predicate places. [2024-05-12 12:37:50,155 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 59 transitions, 139 flow [2024-05-12 12:37:50,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:37:50,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:37:50,156 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:37:50,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-05-12 12:37:50,156 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-05-12 12:37:50,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:37:50,158 INFO L85 PathProgramCache]: Analyzing trace with hash -1183350074, now seen corresponding path program 1 times [2024-05-12 12:37:50,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:37:50,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197470611] [2024-05-12 12:37:50,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:37:50,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:37:50,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:37:50,440 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 12:37:50,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:37:50,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197470611] [2024-05-12 12:37:50,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197470611] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:37:50,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:37:50,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-05-12 12:37:50,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914184220] [2024-05-12 12:37:50,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:37:50,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-05-12 12:37:50,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:37:50,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-05-12 12:37:50,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-05-12 12:37:50,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 63 [2024-05-12 12:37:50,526 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 59 transitions, 139 flow. Second operand has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 0 states have call successors, (0), 0 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 12:37:50,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:37:50,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 63 [2024-05-12 12:37:50,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:37:50,794 INFO L124 PetriNetUnfolderBase]: 733/1650 cut-off events. [2024-05-12 12:37:50,794 INFO L125 PetriNetUnfolderBase]: For 124/124 co-relation queries the response was YES. [2024-05-12 12:37:50,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2795 conditions, 1650 events. 733/1650 cut-off events. For 124/124 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 10584 event pairs, 238 based on Foata normal form. 12/1551 useless extension candidates. Maximal degree in co-relation 2475. Up to 903 conditions per place. [2024-05-12 12:37:50,808 INFO L140 encePairwiseOnDemand]: 54/63 looper letters, 42 selfloop transitions, 8 changer transitions 0/78 dead transitions. [2024-05-12 12:37:50,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 78 transitions, 289 flow [2024-05-12 12:37:50,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-05-12 12:37:50,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-05-12 12:37:50,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 172 transitions. [2024-05-12 12:37:50,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6825396825396826 [2024-05-12 12:37:50,833 INFO L175 Difference]: Start difference. First operand has 58 places, 59 transitions, 139 flow. Second operand 4 states and 172 transitions. [2024-05-12 12:37:50,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 78 transitions, 289 flow [2024-05-12 12:37:50,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 78 transitions, 286 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-05-12 12:37:50,836 INFO L231 Difference]: Finished difference. Result has 62 places, 64 transitions, 191 flow [2024-05-12 12:37:50,840 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=191, PETRI_PLACES=62, PETRI_TRANSITIONS=64} [2024-05-12 12:37:50,840 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 4 predicate places. [2024-05-12 12:37:50,841 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 64 transitions, 191 flow [2024-05-12 12:37:50,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 0 states have call successors, (0), 0 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 12:37:50,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:37:50,841 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:37:50,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-05-12 12:37:50,842 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-05-12 12:37:50,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:37:50,845 INFO L85 PathProgramCache]: Analyzing trace with hash -1357315504, now seen corresponding path program 1 times [2024-05-12 12:37:50,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:37:50,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041631751] [2024-05-12 12:37:50,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:37:50,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:37:50,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:37:50,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:37:50,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:37:50,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041631751] [2024-05-12 12:37:50,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041631751] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:37:50,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:37:50,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-05-12 12:37:50,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992276944] [2024-05-12 12:37:50,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:37:50,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-05-12 12:37:50,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:37:50,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-05-12 12:37:50,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-05-12 12:37:51,044 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 63 [2024-05-12 12:37:51,046 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 64 transitions, 191 flow. Second operand has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 0 states have call successors, (0), 0 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 12:37:51,046 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:37:51,046 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 63 [2024-05-12 12:37:51,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:37:51,177 INFO L124 PetriNetUnfolderBase]: 744/1657 cut-off events. [2024-05-12 12:37:51,178 INFO L125 PetriNetUnfolderBase]: For 470/470 co-relation queries the response was YES. [2024-05-12 12:37:51,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3153 conditions, 1657 events. 744/1657 cut-off events. For 470/470 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 10662 event pairs, 266 based on Foata normal form. 1/1539 useless extension candidates. Maximal degree in co-relation 2946. Up to 950 conditions per place. [2024-05-12 12:37:51,188 INFO L140 encePairwiseOnDemand]: 56/63 looper letters, 41 selfloop transitions, 8 changer transitions 0/78 dead transitions. [2024-05-12 12:37:51,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 78 transitions, 327 flow [2024-05-12 12:37:51,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-05-12 12:37:51,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-05-12 12:37:51,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 165 transitions. [2024-05-12 12:37:51,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6547619047619048 [2024-05-12 12:37:51,190 INFO L175 Difference]: Start difference. First operand has 62 places, 64 transitions, 191 flow. Second operand 4 states and 165 transitions. [2024-05-12 12:37:51,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 78 transitions, 327 flow [2024-05-12 12:37:51,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 78 transitions, 325 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-05-12 12:37:51,195 INFO L231 Difference]: Finished difference. Result has 67 places, 69 transitions, 240 flow [2024-05-12 12:37:51,195 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=189, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=240, PETRI_PLACES=67, PETRI_TRANSITIONS=69} [2024-05-12 12:37:51,196 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 9 predicate places. [2024-05-12 12:37:51,197 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 69 transitions, 240 flow [2024-05-12 12:37:51,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 0 states have call successors, (0), 0 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 12:37:51,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:37:51,197 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:37:51,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-05-12 12:37:51,198 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-05-12 12:37:51,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:37:51,198 INFO L85 PathProgramCache]: Analyzing trace with hash 2103831229, now seen corresponding path program 1 times [2024-05-12 12:37:51,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:37:51,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605414905] [2024-05-12 12:37:51,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:37:51,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:37:51,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:37:51,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:37:51,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:37:51,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605414905] [2024-05-12 12:37:51,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605414905] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:37:51,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:37:51,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:37:51,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079742359] [2024-05-12 12:37:51,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:37:51,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:37:51,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:37:51,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:37:51,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:37:51,399 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 63 [2024-05-12 12:37:51,400 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 69 transitions, 240 flow. Second operand has 6 states, 6 states have (on average 29.5) internal successors, (177), 6 states have internal predecessors, (177), 0 states have call successors, (0), 0 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 12:37:51,400 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:37:51,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 63 [2024-05-12 12:37:51,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:37:51,575 INFO L124 PetriNetUnfolderBase]: 920/1952 cut-off events. [2024-05-12 12:37:51,575 INFO L125 PetriNetUnfolderBase]: For 1054/1093 co-relation queries the response was YES. [2024-05-12 12:37:51,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4199 conditions, 1952 events. 920/1952 cut-off events. For 1054/1093 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 13120 event pairs, 216 based on Foata normal form. 30/1864 useless extension candidates. Maximal degree in co-relation 3169. Up to 569 conditions per place. [2024-05-12 12:37:51,586 INFO L140 encePairwiseOnDemand]: 49/63 looper letters, 63 selfloop transitions, 26 changer transitions 0/115 dead transitions. [2024-05-12 12:37:51,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 115 transitions, 564 flow [2024-05-12 12:37:51,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:37:51,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:37:51,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 249 transitions. [2024-05-12 12:37:51,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6587301587301587 [2024-05-12 12:37:51,588 INFO L175 Difference]: Start difference. First operand has 67 places, 69 transitions, 240 flow. Second operand 6 states and 249 transitions. [2024-05-12 12:37:51,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 115 transitions, 564 flow [2024-05-12 12:37:51,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 115 transitions, 562 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-05-12 12:37:51,595 INFO L231 Difference]: Finished difference. Result has 76 places, 80 transitions, 390 flow [2024-05-12 12:37:51,595 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=390, PETRI_PLACES=76, PETRI_TRANSITIONS=80} [2024-05-12 12:37:51,596 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 18 predicate places. [2024-05-12 12:37:51,596 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 80 transitions, 390 flow [2024-05-12 12:37:51,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 29.5) internal successors, (177), 6 states have internal predecessors, (177), 0 states have call successors, (0), 0 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 12:37:51,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:37:51,597 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:37:51,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-05-12 12:37:51,597 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-05-12 12:37:51,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:37:51,598 INFO L85 PathProgramCache]: Analyzing trace with hash -793674647, now seen corresponding path program 1 times [2024-05-12 12:37:51,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:37:51,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992314318] [2024-05-12 12:37:51,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:37:51,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:37:51,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:37:51,711 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 12:37:51,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:37:51,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992314318] [2024-05-12 12:37:51,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992314318] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:37:51,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:37:51,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 12:37:51,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859198985] [2024-05-12 12:37:51,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:37:51,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 12:37:51,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:37:51,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 12:37:51,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-05-12 12:37:51,759 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 63 [2024-05-12 12:37:51,759 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 80 transitions, 390 flow. Second operand has 5 states, 5 states have (on average 30.2) internal successors, (151), 5 states have internal predecessors, (151), 0 states have call successors, (0), 0 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 12:37:51,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:37:51,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 63 [2024-05-12 12:37:51,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:37:51,938 INFO L124 PetriNetUnfolderBase]: 957/2015 cut-off events. [2024-05-12 12:37:51,941 INFO L125 PetriNetUnfolderBase]: For 3036/3123 co-relation queries the response was YES. [2024-05-12 12:37:51,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5265 conditions, 2015 events. 957/2015 cut-off events. For 3036/3123 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 13004 event pairs, 227 based on Foata normal form. 54/1950 useless extension candidates. Maximal degree in co-relation 4711. Up to 901 conditions per place. [2024-05-12 12:37:51,954 INFO L140 encePairwiseOnDemand]: 52/63 looper letters, 66 selfloop transitions, 25 changer transitions 0/117 dead transitions. [2024-05-12 12:37:51,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 117 transitions, 749 flow [2024-05-12 12:37:51,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 12:37:51,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 12:37:51,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 210 transitions. [2024-05-12 12:37:51,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-05-12 12:37:51,956 INFO L175 Difference]: Start difference. First operand has 76 places, 80 transitions, 390 flow. Second operand 5 states and 210 transitions. [2024-05-12 12:37:51,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 117 transitions, 749 flow [2024-05-12 12:37:51,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 117 transitions, 715 flow, removed 7 selfloop flow, removed 1 redundant places. [2024-05-12 12:37:51,964 INFO L231 Difference]: Finished difference. Result has 82 places, 93 transitions, 554 flow [2024-05-12 12:37:51,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=363, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=554, PETRI_PLACES=82, PETRI_TRANSITIONS=93} [2024-05-12 12:37:51,965 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 24 predicate places. [2024-05-12 12:37:51,966 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 93 transitions, 554 flow [2024-05-12 12:37:51,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.2) internal successors, (151), 5 states have internal predecessors, (151), 0 states have call successors, (0), 0 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 12:37:51,966 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:37:51,966 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:37:51,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-05-12 12:37:51,966 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-05-12 12:37:51,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:37:51,967 INFO L85 PathProgramCache]: Analyzing trace with hash -1407095662, now seen corresponding path program 1 times [2024-05-12 12:37:51,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:37:51,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176466511] [2024-05-12 12:37:51,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:37:51,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:37:51,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:37:51,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:37:51,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:37:51,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176466511] [2024-05-12 12:37:51,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176466511] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:37:51,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:37:51,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 12:37:51,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362441988] [2024-05-12 12:37:51,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:37:51,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-05-12 12:37:51,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:37:51,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-05-12 12:37:51,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-05-12 12:37:52,008 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 63 [2024-05-12 12:37:52,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 93 transitions, 554 flow. Second operand has 4 states, 4 states have (on average 36.75) internal successors, (147), 4 states have internal predecessors, (147), 0 states have call successors, (0), 0 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 12:37:52,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:37:52,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 63 [2024-05-12 12:37:52,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:37:52,175 INFO L124 PetriNetUnfolderBase]: 797/1782 cut-off events. [2024-05-12 12:37:52,175 INFO L125 PetriNetUnfolderBase]: For 2889/2956 co-relation queries the response was YES. [2024-05-12 12:37:52,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4715 conditions, 1782 events. 797/1782 cut-off events. For 2889/2956 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 11846 event pairs, 119 based on Foata normal form. 61/1654 useless extension candidates. Maximal degree in co-relation 4591. Up to 357 conditions per place. [2024-05-12 12:37:52,186 INFO L140 encePairwiseOnDemand]: 54/63 looper letters, 43 selfloop transitions, 27 changer transitions 0/118 dead transitions. [2024-05-12 12:37:52,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 118 transitions, 759 flow [2024-05-12 12:37:52,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 12:37:52,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 12:37:52,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 227 transitions. [2024-05-12 12:37:52,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7206349206349206 [2024-05-12 12:37:52,187 INFO L175 Difference]: Start difference. First operand has 82 places, 93 transitions, 554 flow. Second operand 5 states and 227 transitions. [2024-05-12 12:37:52,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 118 transitions, 759 flow [2024-05-12 12:37:52,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 118 transitions, 725 flow, removed 14 selfloop flow, removed 2 redundant places. [2024-05-12 12:37:52,196 INFO L231 Difference]: Finished difference. Result has 88 places, 99 transitions, 654 flow [2024-05-12 12:37:52,197 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=467, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=654, PETRI_PLACES=88, PETRI_TRANSITIONS=99} [2024-05-12 12:37:52,198 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 30 predicate places. [2024-05-12 12:37:52,198 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 99 transitions, 654 flow [2024-05-12 12:37:52,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.75) internal successors, (147), 4 states have internal predecessors, (147), 0 states have call successors, (0), 0 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 12:37:52,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:37:52,199 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:37:52,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-05-12 12:37:52,202 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-05-12 12:37:52,202 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:37:52,203 INFO L85 PathProgramCache]: Analyzing trace with hash -2085037601, now seen corresponding path program 1 times [2024-05-12 12:37:52,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:37:52,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786563360] [2024-05-12 12:37:52,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:37:52,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:37:52,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:37:52,297 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 12:37:52,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:37:52,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786563360] [2024-05-12 12:37:52,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786563360] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:37:52,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:37:52,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:37:52,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233553791] [2024-05-12 12:37:52,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:37:52,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:37:52,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:37:52,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:37:52,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:37:52,348 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 63 [2024-05-12 12:37:52,349 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 99 transitions, 654 flow. Second operand has 6 states, 6 states have (on average 29.666666666666668) internal successors, (178), 6 states have internal predecessors, (178), 0 states have call successors, (0), 0 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 12:37:52,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:37:52,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 63 [2024-05-12 12:37:52,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:37:52,580 INFO L124 PetriNetUnfolderBase]: 1151/2358 cut-off events. [2024-05-12 12:37:52,580 INFO L125 PetriNetUnfolderBase]: For 7342/7619 co-relation queries the response was YES. [2024-05-12 12:37:52,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7514 conditions, 2358 events. 1151/2358 cut-off events. For 7342/7619 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 15486 event pairs, 123 based on Foata normal form. 24/2257 useless extension candidates. Maximal degree in co-relation 6053. Up to 705 conditions per place. [2024-05-12 12:37:52,595 INFO L140 encePairwiseOnDemand]: 52/63 looper letters, 78 selfloop transitions, 36 changer transitions 0/142 dead transitions. [2024-05-12 12:37:52,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 142 transitions, 1086 flow [2024-05-12 12:37:52,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:37:52,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:37:52,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 247 transitions. [2024-05-12 12:37:52,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6534391534391535 [2024-05-12 12:37:52,596 INFO L175 Difference]: Start difference. First operand has 88 places, 99 transitions, 654 flow. Second operand 6 states and 247 transitions. [2024-05-12 12:37:52,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 142 transitions, 1086 flow [2024-05-12 12:37:52,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 142 transitions, 1078 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-05-12 12:37:52,606 INFO L231 Difference]: Finished difference. Result has 96 places, 106 transitions, 841 flow [2024-05-12 12:37:52,606 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=642, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=841, PETRI_PLACES=96, PETRI_TRANSITIONS=106} [2024-05-12 12:37:52,607 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 38 predicate places. [2024-05-12 12:37:52,607 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 106 transitions, 841 flow [2024-05-12 12:37:52,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 29.666666666666668) internal successors, (178), 6 states have internal predecessors, (178), 0 states have call successors, (0), 0 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 12:37:52,607 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:37:52,607 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:37:52,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-05-12 12:37:52,608 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-05-12 12:37:52,608 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:37:52,608 INFO L85 PathProgramCache]: Analyzing trace with hash 1954858079, now seen corresponding path program 2 times [2024-05-12 12:37:52,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:37:52,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286126971] [2024-05-12 12:37:52,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:37:52,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:37:52,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:37:52,678 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 12:37:52,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:37:52,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286126971] [2024-05-12 12:37:52,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286126971] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:37:52,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:37:52,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 12:37:52,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189231382] [2024-05-12 12:37:52,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:37:52,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 12:37:52,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:37:52,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 12:37:52,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-05-12 12:37:52,716 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 63 [2024-05-12 12:37:52,716 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 106 transitions, 841 flow. Second operand has 5 states, 5 states have (on average 30.2) internal successors, (151), 5 states have internal predecessors, (151), 0 states have call successors, (0), 0 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 12:37:52,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:37:52,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 63 [2024-05-12 12:37:52,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:37:52,936 INFO L124 PetriNetUnfolderBase]: 1128/2272 cut-off events. [2024-05-12 12:37:52,937 INFO L125 PetriNetUnfolderBase]: For 11502/11736 co-relation queries the response was YES. [2024-05-12 12:37:52,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8295 conditions, 2272 events. 1128/2272 cut-off events. For 11502/11736 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 14675 event pairs, 316 based on Foata normal form. 51/2213 useless extension candidates. Maximal degree in co-relation 6719. Up to 1138 conditions per place. [2024-05-12 12:37:52,950 INFO L140 encePairwiseOnDemand]: 53/63 looper letters, 70 selfloop transitions, 32 changer transitions 0/130 dead transitions. [2024-05-12 12:37:52,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 130 transitions, 1204 flow [2024-05-12 12:37:52,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 12:37:52,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 12:37:52,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 204 transitions. [2024-05-12 12:37:52,952 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6476190476190476 [2024-05-12 12:37:52,952 INFO L175 Difference]: Start difference. First operand has 96 places, 106 transitions, 841 flow. Second operand 5 states and 204 transitions. [2024-05-12 12:37:52,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 130 transitions, 1204 flow [2024-05-12 12:37:52,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 130 transitions, 1150 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-05-12 12:37:52,969 INFO L231 Difference]: Finished difference. Result has 99 places, 110 transitions, 915 flow [2024-05-12 12:37:52,969 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=793, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=915, PETRI_PLACES=99, PETRI_TRANSITIONS=110} [2024-05-12 12:37:52,969 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 41 predicate places. [2024-05-12 12:37:52,969 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 110 transitions, 915 flow [2024-05-12 12:37:52,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.2) internal successors, (151), 5 states have internal predecessors, (151), 0 states have call successors, (0), 0 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 12:37:52,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:37:52,970 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:37:52,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-05-12 12:37:52,970 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-05-12 12:37:52,970 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:37:52,971 INFO L85 PathProgramCache]: Analyzing trace with hash 1289902158, now seen corresponding path program 1 times [2024-05-12 12:37:52,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:37:52,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997102967] [2024-05-12 12:37:52,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:37:52,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:37:52,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:37:53,041 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 12:37:53,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:37:53,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997102967] [2024-05-12 12:37:53,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997102967] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:37:53,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:37:53,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 12:37:53,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023474141] [2024-05-12 12:37:53,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:37:53,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 12:37:53,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:37:53,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 12:37:53,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-05-12 12:37:53,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 63 [2024-05-12 12:37:53,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 110 transitions, 915 flow. Second operand has 5 states, 5 states have (on average 32.2) internal successors, (161), 5 states have internal predecessors, (161), 0 states have call successors, (0), 0 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 12:37:53,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:37:53,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 63 [2024-05-12 12:37:53,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:37:53,299 INFO L124 PetriNetUnfolderBase]: 1135/2334 cut-off events. [2024-05-12 12:37:53,299 INFO L125 PetriNetUnfolderBase]: For 12690/12940 co-relation queries the response was YES. [2024-05-12 12:37:53,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8647 conditions, 2334 events. 1135/2334 cut-off events. For 12690/12940 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 15272 event pairs, 279 based on Foata normal form. 51/2262 useless extension candidates. Maximal degree in co-relation 8446. Up to 1530 conditions per place. [2024-05-12 12:37:53,314 INFO L140 encePairwiseOnDemand]: 54/63 looper letters, 78 selfloop transitions, 10 changer transitions 0/123 dead transitions. [2024-05-12 12:37:53,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 123 transitions, 1139 flow [2024-05-12 12:37:53,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 12:37:53,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 12:37:53,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 199 transitions. [2024-05-12 12:37:53,315 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6317460317460317 [2024-05-12 12:37:53,315 INFO L175 Difference]: Start difference. First operand has 99 places, 110 transitions, 915 flow. Second operand 5 states and 199 transitions. [2024-05-12 12:37:53,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 123 transitions, 1139 flow [2024-05-12 12:37:53,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 123 transitions, 1110 flow, removed 9 selfloop flow, removed 1 redundant places. [2024-05-12 12:37:53,332 INFO L231 Difference]: Finished difference. Result has 103 places, 112 transitions, 927 flow [2024-05-12 12:37:53,332 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=886, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=927, PETRI_PLACES=103, PETRI_TRANSITIONS=112} [2024-05-12 12:37:53,333 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 45 predicate places. [2024-05-12 12:37:53,333 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 112 transitions, 927 flow [2024-05-12 12:37:53,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.2) internal successors, (161), 5 states have internal predecessors, (161), 0 states have call successors, (0), 0 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 12:37:53,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:37:53,333 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:37:53,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-05-12 12:37:53,334 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-05-12 12:37:53,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:37:53,334 INFO L85 PathProgramCache]: Analyzing trace with hash -2055248947, now seen corresponding path program 1 times [2024-05-12 12:37:53,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:37:53,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90365699] [2024-05-12 12:37:53,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:37:53,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:37:53,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:37:53,363 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 12:37:53,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:37:53,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90365699] [2024-05-12 12:37:53,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90365699] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:37:53,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:37:53,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:37:53,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717181598] [2024-05-12 12:37:53,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:37:53,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-05-12 12:37:53,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:37:53,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-05-12 12:37:53,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-05-12 12:37:53,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 63 [2024-05-12 12:37:53,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 112 transitions, 927 flow. Second operand has 4 states, 4 states have (on average 38.75) internal successors, (155), 4 states have internal predecessors, (155), 0 states have call successors, (0), 0 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 12:37:53,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:37:53,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 63 [2024-05-12 12:37:53,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:37:53,684 INFO L292 olderBase$Statistics]: inserting event number 4 for the transition-marking pair ([289] L760-->L762: Formula: (= v_~flag2~0_2 0) InVars {} OutVars{~flag2~0=v_~flag2~0_2} AuxVars[] AssignedVars[~flag2~0][86], [111#(= ~flag2~0 0), Black: 129#(and (= ~flag1~0 0) (= ~flag2~0 1) (= ~turn~0 0) (= ~x~0 1)), Black: 67#(and (= ~flag1~0 0) (= ~x~0 0) (= ~turn~0 0) (= ~flag2~0 0)), 104#(and (<= thr1Thread1of1ForFork1_~f2~0 0) (<= ~flag2~0 0)), Black: 72#(and (= ~x~0 0) (= ~flag1~0 1) (= ~turn~0 0) (= ~flag2~0 0)), 91#true, 54#L762true, Black: 78#(and (= ~flag1~0 0) (= ~x~0 0) (= ~flag2~0 1) (= ~turn~0 0)), Black: 77#(and (= ~flag1~0 0) (= ~x~0 0) (= ~turn~0 0)), 49#L742true, Black: 85#(and (= ~x~0 0) (= ~flag1~0 1) (= ~flag2~0 0)), Black: 86#(and (= ~x~0 0) (= ~turn~0 1) (= ~flag1~0 1) (= ~flag2~0 0)), Black: 84#(and (= ~flag1~0 1) (= ~flag2~0 0)), Black: 93#(and (= ~x~0 0) (= ~turn~0 0)), 75#true, Black: 95#(and (= ~x~0 0) (= ~flag2~0 1) (= ~flag1~0 1) (= ~turn~0 0)), Black: 94#(and (= ~x~0 0) (= ~flag1~0 1) (= ~turn~0 0)), 83#(= ~flag2~0 0), Black: 101#(<= ~flag2~0 0), Black: 99#true, Black: 102#(<= thr1Thread1of1ForFork1_~f2~0 0), 125#true, 136#(and (= thr2Thread1of1ForFork0_~f1~0 1) (= ~flag1~0 1)), Black: 113#(and (= ~x~0 0) (= ~turn~0 1) (= ~flag2~0 0)), Black: 112#(and (= ~x~0 0) (= ~flag2~0 0)), Black: 114#(and (= ~flag1~0 0) (= ~x~0 0) (= ~turn~0 1) (= ~flag2~0 0)), 31#ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANTtrue, Black: 123#(and (= ~x~0 0) (= ~flag2~0 1) (= ~flag1~0 1) (= ~turn~0 0)), thr2Thread1of1ForFork0InUse]) [2024-05-12 12:37:53,684 INFO L294 olderBase$Statistics]: this new event has 31 ancestors and is cut-off event [2024-05-12 12:37:53,684 INFO L297 olderBase$Statistics]: existing Event has 31 ancestors and is cut-off event [2024-05-12 12:37:53,684 INFO L297 olderBase$Statistics]: existing Event has 22 ancestors and is cut-off event [2024-05-12 12:37:53,685 INFO L297 olderBase$Statistics]: existing Event has 31 ancestors and is cut-off event [2024-05-12 12:37:53,701 INFO L124 PetriNetUnfolderBase]: 1148/2656 cut-off events. [2024-05-12 12:37:53,702 INFO L125 PetriNetUnfolderBase]: For 10876/11019 co-relation queries the response was YES. [2024-05-12 12:37:53,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8841 conditions, 2656 events. 1148/2656 cut-off events. For 10876/11019 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 20299 event pairs, 221 based on Foata normal form. 89/2540 useless extension candidates. Maximal degree in co-relation 8204. Up to 467 conditions per place. [2024-05-12 12:37:53,718 INFO L140 encePairwiseOnDemand]: 56/63 looper letters, 51 selfloop transitions, 28 changer transitions 0/146 dead transitions. [2024-05-12 12:37:53,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 146 transitions, 1246 flow [2024-05-12 12:37:53,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 12:37:53,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 12:37:53,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 231 transitions. [2024-05-12 12:37:53,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7333333333333333 [2024-05-12 12:37:53,720 INFO L175 Difference]: Start difference. First operand has 103 places, 112 transitions, 927 flow. Second operand 5 states and 231 transitions. [2024-05-12 12:37:53,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 146 transitions, 1246 flow [2024-05-12 12:37:53,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 146 transitions, 1223 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-05-12 12:37:53,744 INFO L231 Difference]: Finished difference. Result has 107 places, 122 transitions, 1080 flow [2024-05-12 12:37:53,744 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=898, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1080, PETRI_PLACES=107, PETRI_TRANSITIONS=122} [2024-05-12 12:37:53,744 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 49 predicate places. [2024-05-12 12:37:53,744 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 122 transitions, 1080 flow [2024-05-12 12:37:53,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.75) internal successors, (155), 4 states have internal predecessors, (155), 0 states have call successors, (0), 0 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 12:37:53,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:37:53,745 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:37:53,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-05-12 12:37:53,745 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-05-12 12:37:53,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:37:53,746 INFO L85 PathProgramCache]: Analyzing trace with hash -1879047651, now seen corresponding path program 2 times [2024-05-12 12:37:53,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:37:53,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927078011] [2024-05-12 12:37:53,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:37:53,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:37:53,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:37:53,820 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 12:37:53,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:37:53,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927078011] [2024-05-12 12:37:53,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927078011] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:37:53,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:37:53,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:37:53,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242334555] [2024-05-12 12:37:53,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:37:53,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:37:53,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:37:53,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:37:53,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:37:53,874 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 63 [2024-05-12 12:37:53,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 122 transitions, 1080 flow. Second operand has 6 states, 6 states have (on average 30.0) internal successors, (180), 6 states have internal predecessors, (180), 0 states have call successors, (0), 0 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 12:37:53,875 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:37:53,875 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 63 [2024-05-12 12:37:53,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:37:54,212 INFO L124 PetriNetUnfolderBase]: 1687/3427 cut-off events. [2024-05-12 12:37:54,212 INFO L125 PetriNetUnfolderBase]: For 20734/21052 co-relation queries the response was YES. [2024-05-12 12:37:54,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13532 conditions, 3427 events. 1687/3427 cut-off events. For 20734/21052 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 24933 event pairs, 467 based on Foata normal form. 128/3365 useless extension candidates. Maximal degree in co-relation 10105. Up to 1197 conditions per place. [2024-05-12 12:37:54,235 INFO L140 encePairwiseOnDemand]: 49/63 looper letters, 85 selfloop transitions, 42 changer transitions 0/158 dead transitions. [2024-05-12 12:37:54,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 158 transitions, 1537 flow [2024-05-12 12:37:54,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:37:54,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:37:54,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 248 transitions. [2024-05-12 12:37:54,237 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.656084656084656 [2024-05-12 12:37:54,237 INFO L175 Difference]: Start difference. First operand has 107 places, 122 transitions, 1080 flow. Second operand 6 states and 248 transitions. [2024-05-12 12:37:54,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 158 transitions, 1537 flow [2024-05-12 12:37:54,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 158 transitions, 1537 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-05-12 12:37:54,272 INFO L231 Difference]: Finished difference. Result has 114 places, 131 transitions, 1274 flow [2024-05-12 12:37:54,272 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=1080, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1274, PETRI_PLACES=114, PETRI_TRANSITIONS=131} [2024-05-12 12:37:54,273 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 56 predicate places. [2024-05-12 12:37:54,273 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 131 transitions, 1274 flow [2024-05-12 12:37:54,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 30.0) internal successors, (180), 6 states have internal predecessors, (180), 0 states have call successors, (0), 0 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 12:37:54,273 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:37:54,274 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:37:54,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-05-12 12:37:54,274 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-05-12 12:37:54,274 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:37:54,274 INFO L85 PathProgramCache]: Analyzing trace with hash -1649510387, now seen corresponding path program 3 times [2024-05-12 12:37:54,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:37:54,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080024297] [2024-05-12 12:37:54,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:37:54,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:37:54,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:37:54,348 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 12:37:54,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:37:54,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080024297] [2024-05-12 12:37:54,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080024297] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:37:54,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:37:54,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:37:54,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906313099] [2024-05-12 12:37:54,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:37:54,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:37:54,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:37:54,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:37:54,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:37:54,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 63 [2024-05-12 12:37:54,400 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 131 transitions, 1274 flow. Second operand has 6 states, 6 states have (on average 30.0) internal successors, (180), 6 states have internal predecessors, (180), 0 states have call successors, (0), 0 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 12:37:54,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:37:54,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 63 [2024-05-12 12:37:54,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:37:54,719 INFO L124 PetriNetUnfolderBase]: 1651/3355 cut-off events. [2024-05-12 12:37:54,719 INFO L125 PetriNetUnfolderBase]: For 26656/26983 co-relation queries the response was YES. [2024-05-12 12:37:54,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14388 conditions, 3355 events. 1651/3355 cut-off events. For 26656/26983 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 24306 event pairs, 455 based on Foata normal form. 135/3310 useless extension candidates. Maximal degree in co-relation 10865. Up to 1198 conditions per place. [2024-05-12 12:37:54,743 INFO L140 encePairwiseOnDemand]: 50/63 looper letters, 87 selfloop transitions, 40 changer transitions 0/158 dead transitions. [2024-05-12 12:37:54,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 158 transitions, 1688 flow [2024-05-12 12:37:54,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:37:54,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:37:54,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 246 transitions. [2024-05-12 12:37:54,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6507936507936508 [2024-05-12 12:37:54,745 INFO L175 Difference]: Start difference. First operand has 114 places, 131 transitions, 1274 flow. Second operand 6 states and 246 transitions. [2024-05-12 12:37:54,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 158 transitions, 1688 flow [2024-05-12 12:37:54,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 158 transitions, 1657 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-05-12 12:37:54,786 INFO L231 Difference]: Finished difference. Result has 120 places, 133 transitions, 1361 flow [2024-05-12 12:37:54,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=1243, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1361, PETRI_PLACES=120, PETRI_TRANSITIONS=133} [2024-05-12 12:37:54,786 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 62 predicate places. [2024-05-12 12:37:54,787 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 133 transitions, 1361 flow [2024-05-12 12:37:54,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 30.0) internal successors, (180), 6 states have internal predecessors, (180), 0 states have call successors, (0), 0 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 12:37:54,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:37:54,787 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:37:54,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-05-12 12:37:54,787 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-05-12 12:37:54,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:37:54,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1649526135, now seen corresponding path program 1 times [2024-05-12 12:37:54,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:37:54,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239698656] [2024-05-12 12:37:54,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:37:54,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:37:54,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:37:54,897 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 12:37:54,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:37:54,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239698656] [2024-05-12 12:37:54,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239698656] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:37:54,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:37:54,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:37:54,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888836677] [2024-05-12 12:37:54,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:37:54,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:37:54,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:37:54,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:37:54,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:37:54,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 63 [2024-05-12 12:37:54,957 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 133 transitions, 1361 flow. Second operand has 6 states, 6 states have (on average 30.0) internal successors, (180), 6 states have internal predecessors, (180), 0 states have call successors, (0), 0 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 12:37:54,957 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:37:54,957 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 63 [2024-05-12 12:37:54,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:37:55,298 INFO L124 PetriNetUnfolderBase]: 1789/3641 cut-off events. [2024-05-12 12:37:55,299 INFO L125 PetriNetUnfolderBase]: For 32225/32613 co-relation queries the response was YES. [2024-05-12 12:37:55,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16204 conditions, 3641 events. 1789/3641 cut-off events. For 32225/32613 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 26763 event pairs, 446 based on Foata normal form. 66/3523 useless extension candidates. Maximal degree in co-relation 15114. Up to 1458 conditions per place. [2024-05-12 12:37:55,325 INFO L140 encePairwiseOnDemand]: 50/63 looper letters, 95 selfloop transitions, 50 changer transitions 4/180 dead transitions. [2024-05-12 12:37:55,325 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 180 transitions, 2005 flow [2024-05-12 12:37:55,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:37:55,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:37:55,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 245 transitions. [2024-05-12 12:37:55,327 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6481481481481481 [2024-05-12 12:37:55,327 INFO L175 Difference]: Start difference. First operand has 120 places, 133 transitions, 1361 flow. Second operand 6 states and 245 transitions. [2024-05-12 12:37:55,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 180 transitions, 2005 flow [2024-05-12 12:37:55,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 180 transitions, 1954 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-05-12 12:37:55,376 INFO L231 Difference]: Finished difference. Result has 127 places, 146 transitions, 1662 flow [2024-05-12 12:37:55,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=1314, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1662, PETRI_PLACES=127, PETRI_TRANSITIONS=146} [2024-05-12 12:37:55,377 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 69 predicate places. [2024-05-12 12:37:55,377 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 146 transitions, 1662 flow [2024-05-12 12:37:55,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 30.0) internal successors, (180), 6 states have internal predecessors, (180), 0 states have call successors, (0), 0 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 12:37:55,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:37:55,378 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:37:55,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-05-12 12:37:55,378 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-05-12 12:37:55,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:37:55,378 INFO L85 PathProgramCache]: Analyzing trace with hash -1660006089, now seen corresponding path program 1 times [2024-05-12 12:37:55,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:37:55,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959055588] [2024-05-12 12:37:55,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:37:55,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:37:55,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:37:55,407 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 12:37:55,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:37:55,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959055588] [2024-05-12 12:37:55,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959055588] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:37:55,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:37:55,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 12:37:55,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423545883] [2024-05-12 12:37:55,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:37:55,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-05-12 12:37:55,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:37:55,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-05-12 12:37:55,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-05-12 12:37:55,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 63 [2024-05-12 12:37:55,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 146 transitions, 1662 flow. Second operand has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 0 states have call successors, (0), 0 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 12:37:55,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:37:55,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 63 [2024-05-12 12:37:55,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:37:55,607 INFO L124 PetriNetUnfolderBase]: 1008/2268 cut-off events. [2024-05-12 12:37:55,607 INFO L125 PetriNetUnfolderBase]: For 19464/19625 co-relation queries the response was YES. [2024-05-12 12:37:55,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9777 conditions, 2268 events. 1008/2268 cut-off events. For 19464/19625 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 16205 event pairs, 181 based on Foata normal form. 68/2141 useless extension candidates. Maximal degree in co-relation 9163. Up to 346 conditions per place. [2024-05-12 12:37:55,624 INFO L140 encePairwiseOnDemand]: 55/63 looper letters, 52 selfloop transitions, 37 changer transitions 0/164 dead transitions. [2024-05-12 12:37:55,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 164 transitions, 1866 flow [2024-05-12 12:37:55,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 12:37:55,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 12:37:55,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 225 transitions. [2024-05-12 12:37:55,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7142857142857143 [2024-05-12 12:37:55,626 INFO L175 Difference]: Start difference. First operand has 127 places, 146 transitions, 1662 flow. Second operand 5 states and 225 transitions. [2024-05-12 12:37:55,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 164 transitions, 1866 flow [2024-05-12 12:37:55,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 164 transitions, 1797 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-05-12 12:37:55,664 INFO L231 Difference]: Finished difference. Result has 130 places, 143 transitions, 1646 flow [2024-05-12 12:37:55,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=1450, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1646, PETRI_PLACES=130, PETRI_TRANSITIONS=143} [2024-05-12 12:37:55,665 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 72 predicate places. [2024-05-12 12:37:55,665 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 143 transitions, 1646 flow [2024-05-12 12:37:55,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 0 states have call successors, (0), 0 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 12:37:55,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:37:55,665 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:37:55,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-05-12 12:37:55,665 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-05-12 12:37:55,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:37:55,666 INFO L85 PathProgramCache]: Analyzing trace with hash 1005119766, now seen corresponding path program 1 times [2024-05-12 12:37:55,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:37:55,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536689498] [2024-05-12 12:37:55,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:37:55,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:37:55,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:37:55,744 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 12:37:55,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:37:55,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536689498] [2024-05-12 12:37:55,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536689498] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:37:55,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:37:55,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:37:55,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972338915] [2024-05-12 12:37:55,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:37:55,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:37:55,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:37:55,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:37:55,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:37:55,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 63 [2024-05-12 12:37:55,791 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 143 transitions, 1646 flow. Second operand has 6 states, 6 states have (on average 30.166666666666668) internal successors, (181), 6 states have internal predecessors, (181), 0 states have call successors, (0), 0 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 12:37:55,791 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:37:55,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 63 [2024-05-12 12:37:55,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:37:56,090 INFO L124 PetriNetUnfolderBase]: 1337/2808 cut-off events. [2024-05-12 12:37:56,091 INFO L125 PetriNetUnfolderBase]: For 29762/29942 co-relation queries the response was YES. [2024-05-12 12:37:56,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13080 conditions, 2808 events. 1337/2808 cut-off events. For 29762/29942 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 19778 event pairs, 294 based on Foata normal form. 41/2711 useless extension candidates. Maximal degree in co-relation 12353. Up to 1066 conditions per place. [2024-05-12 12:37:56,111 INFO L140 encePairwiseOnDemand]: 53/63 looper letters, 97 selfloop transitions, 52 changer transitions 6/185 dead transitions. [2024-05-12 12:37:56,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 185 transitions, 2252 flow [2024-05-12 12:37:56,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:37:56,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:37:56,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 244 transitions. [2024-05-12 12:37:56,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6455026455026455 [2024-05-12 12:37:56,113 INFO L175 Difference]: Start difference. First operand has 130 places, 143 transitions, 1646 flow. Second operand 6 states and 244 transitions. [2024-05-12 12:37:56,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 185 transitions, 2252 flow [2024-05-12 12:37:56,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 185 transitions, 2221 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-05-12 12:37:56,160 INFO L231 Difference]: Finished difference. Result has 138 places, 151 transitions, 1906 flow [2024-05-12 12:37:56,161 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=1618, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1906, PETRI_PLACES=138, PETRI_TRANSITIONS=151} [2024-05-12 12:37:56,162 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 80 predicate places. [2024-05-12 12:37:56,162 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 151 transitions, 1906 flow [2024-05-12 12:37:56,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 30.166666666666668) internal successors, (181), 6 states have internal predecessors, (181), 0 states have call successors, (0), 0 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 12:37:56,162 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:37:56,162 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 12:37:56,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-05-12 12:37:56,162 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-05-12 12:37:56,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:37:56,163 INFO L85 PathProgramCache]: Analyzing trace with hash 2074655176, now seen corresponding path program 1 times [2024-05-12 12:37:56,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:37:56,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331458143] [2024-05-12 12:37:56,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:37:56,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:37:56,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:37:56,243 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 12:37:56,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:37:56,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331458143] [2024-05-12 12:37:56,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331458143] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:37:56,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:37:56,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:37:56,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774217231] [2024-05-12 12:37:56,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:37:56,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:37:56,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:37:56,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:37:56,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:37:56,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 63 [2024-05-12 12:37:56,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 151 transitions, 1906 flow. Second operand has 6 states, 6 states have (on average 30.166666666666668) internal successors, (181), 6 states have internal predecessors, (181), 0 states have call successors, (0), 0 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 12:37:56,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:37:56,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 63 [2024-05-12 12:37:56,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:37:56,609 INFO L124 PetriNetUnfolderBase]: 1461/3038 cut-off events. [2024-05-12 12:37:56,609 INFO L125 PetriNetUnfolderBase]: For 40478/40687 co-relation queries the response was YES. [2024-05-12 12:37:56,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15421 conditions, 3038 events. 1461/3038 cut-off events. For 40478/40687 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 21549 event pairs, 466 based on Foata normal form. 85/2990 useless extension candidates. Maximal degree in co-relation 14573. Up to 1137 conditions per place. [2024-05-12 12:37:56,633 INFO L140 encePairwiseOnDemand]: 49/63 looper letters, 98 selfloop transitions, 66 changer transitions 0/194 dead transitions. [2024-05-12 12:37:56,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 194 transitions, 2596 flow [2024-05-12 12:37:56,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:37:56,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:37:56,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 253 transitions. [2024-05-12 12:37:56,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6693121693121693 [2024-05-12 12:37:56,635 INFO L175 Difference]: Start difference. First operand has 138 places, 151 transitions, 1906 flow. Second operand 6 states and 253 transitions. [2024-05-12 12:37:56,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 194 transitions, 2596 flow [2024-05-12 12:37:56,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 194 transitions, 2522 flow, removed 14 selfloop flow, removed 2 redundant places. [2024-05-12 12:37:56,700 INFO L231 Difference]: Finished difference. Result has 144 places, 157 transitions, 2126 flow [2024-05-12 12:37:56,700 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=1839, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2126, PETRI_PLACES=144, PETRI_TRANSITIONS=157} [2024-05-12 12:37:56,701 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 86 predicate places. [2024-05-12 12:37:56,701 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 157 transitions, 2126 flow [2024-05-12 12:37:56,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 30.166666666666668) internal successors, (181), 6 states have internal predecessors, (181), 0 states have call successors, (0), 0 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 12:37:56,701 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:37:56,702 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 12:37:56,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-05-12 12:37:56,702 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-05-12 12:37:56,702 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:37:56,702 INFO L85 PathProgramCache]: Analyzing trace with hash 2073614506, now seen corresponding path program 2 times [2024-05-12 12:37:56,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:37:56,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396080367] [2024-05-12 12:37:56,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:37:56,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:37:56,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:37:56,797 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 12:37:56,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:37:56,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396080367] [2024-05-12 12:37:56,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396080367] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:37:56,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:37:56,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:37:56,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799355769] [2024-05-12 12:37:56,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:37:56,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:37:56,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:37:56,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:37:56,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:37:56,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 63 [2024-05-12 12:37:56,862 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 157 transitions, 2126 flow. Second operand has 6 states, 6 states have (on average 30.166666666666668) internal successors, (181), 6 states have internal predecessors, (181), 0 states have call successors, (0), 0 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 12:37:56,862 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:37:56,862 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 63 [2024-05-12 12:37:56,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:37:57,227 INFO L124 PetriNetUnfolderBase]: 1493/3088 cut-off events. [2024-05-12 12:37:57,228 INFO L125 PetriNetUnfolderBase]: For 47247/47585 co-relation queries the response was YES. [2024-05-12 12:37:57,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16747 conditions, 3088 events. 1493/3088 cut-off events. For 47247/47585 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 21931 event pairs, 463 based on Foata normal form. 77/3018 useless extension candidates. Maximal degree in co-relation 15859. Up to 1151 conditions per place. [2024-05-12 12:37:57,250 INFO L140 encePairwiseOnDemand]: 52/63 looper letters, 98 selfloop transitions, 64 changer transitions 0/192 dead transitions. [2024-05-12 12:37:57,251 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 192 transitions, 2765 flow [2024-05-12 12:37:57,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:37:57,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:37:57,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 239 transitions. [2024-05-12 12:37:57,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6322751322751323 [2024-05-12 12:37:57,252 INFO L175 Difference]: Start difference. First operand has 144 places, 157 transitions, 2126 flow. Second operand 6 states and 239 transitions. [2024-05-12 12:37:57,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 192 transitions, 2765 flow [2024-05-12 12:37:57,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 192 transitions, 2619 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-05-12 12:37:57,357 INFO L231 Difference]: Finished difference. Result has 149 places, 163 transitions, 2270 flow [2024-05-12 12:37:57,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=1986, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2270, PETRI_PLACES=149, PETRI_TRANSITIONS=163} [2024-05-12 12:37:57,358 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 91 predicate places. [2024-05-12 12:37:57,358 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 163 transitions, 2270 flow [2024-05-12 12:37:57,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 30.166666666666668) internal successors, (181), 6 states have internal predecessors, (181), 0 states have call successors, (0), 0 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 12:37:57,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:37:57,359 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 12:37:57,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-05-12 12:37:57,359 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-05-12 12:37:57,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:37:57,359 INFO L85 PathProgramCache]: Analyzing trace with hash 1274677546, now seen corresponding path program 3 times [2024-05-12 12:37:57,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:37:57,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707392875] [2024-05-12 12:37:57,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:37:57,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:37:57,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:37:57,436 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 12:37:57,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:37:57,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707392875] [2024-05-12 12:37:57,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707392875] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:37:57,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:37:57,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:37:57,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807442646] [2024-05-12 12:37:57,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:37:57,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:37:57,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:37:57,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:37:57,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:37:57,498 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 63 [2024-05-12 12:37:57,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 163 transitions, 2270 flow. Second operand has 6 states, 6 states have (on average 30.166666666666668) internal successors, (181), 6 states have internal predecessors, (181), 0 states have call successors, (0), 0 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 12:37:57,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:37:57,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 63 [2024-05-12 12:37:57,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:37:57,823 INFO L124 PetriNetUnfolderBase]: 1494/3070 cut-off events. [2024-05-12 12:37:57,823 INFO L125 PetriNetUnfolderBase]: For 51117/51514 co-relation queries the response was YES. [2024-05-12 12:37:57,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17277 conditions, 3070 events. 1494/3070 cut-off events. For 51117/51514 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 21747 event pairs, 523 based on Foata normal form. 90/3023 useless extension candidates. Maximal degree in co-relation 16397. Up to 1164 conditions per place. [2024-05-12 12:37:57,847 INFO L140 encePairwiseOnDemand]: 53/63 looper letters, 89 selfloop transitions, 68 changer transitions 0/187 dead transitions. [2024-05-12 12:37:57,848 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 187 transitions, 2797 flow [2024-05-12 12:37:57,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:37:57,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:37:57,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 229 transitions. [2024-05-12 12:37:57,849 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6058201058201058 [2024-05-12 12:37:57,849 INFO L175 Difference]: Start difference. First operand has 149 places, 163 transitions, 2270 flow. Second operand 6 states and 229 transitions. [2024-05-12 12:37:57,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 187 transitions, 2797 flow [2024-05-12 12:37:57,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 187 transitions, 2696 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-05-12 12:37:57,935 INFO L231 Difference]: Finished difference. Result has 154 places, 168 transitions, 2435 flow [2024-05-12 12:37:57,935 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=2172, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2435, PETRI_PLACES=154, PETRI_TRANSITIONS=168} [2024-05-12 12:37:57,936 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 96 predicate places. [2024-05-12 12:37:57,936 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 168 transitions, 2435 flow [2024-05-12 12:37:57,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 30.166666666666668) internal successors, (181), 6 states have internal predecessors, (181), 0 states have call successors, (0), 0 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 12:37:57,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:37:57,936 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 12:37:57,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-05-12 12:37:57,937 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-05-12 12:37:57,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:37:57,938 INFO L85 PathProgramCache]: Analyzing trace with hash -1153647446, now seen corresponding path program 4 times [2024-05-12 12:37:57,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:37:57,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129782901] [2024-05-12 12:37:57,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:37:57,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:37:57,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:37:57,995 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 12:37:57,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:37:57,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129782901] [2024-05-12 12:37:57,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129782901] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:37:57,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:37:57,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:37:57,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360676365] [2024-05-12 12:37:57,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:37:57,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-05-12 12:37:57,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:37:57,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-05-12 12:37:57,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-05-12 12:37:58,008 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 63 [2024-05-12 12:37:58,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 168 transitions, 2435 flow. Second operand has 4 states, 4 states have (on average 38.75) internal successors, (155), 4 states have internal predecessors, (155), 0 states have call successors, (0), 0 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 12:37:58,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:37:58,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 63 [2024-05-12 12:37:58,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:37:58,267 INFO L124 PetriNetUnfolderBase]: 841/2012 cut-off events. [2024-05-12 12:37:58,267 INFO L125 PetriNetUnfolderBase]: For 30894/31109 co-relation queries the response was YES. [2024-05-12 12:37:58,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10096 conditions, 2012 events. 841/2012 cut-off events. For 30894/31109 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 14759 event pairs, 209 based on Foata normal form. 113/1977 useless extension candidates. Maximal degree in co-relation 8023. Up to 422 conditions per place. [2024-05-12 12:37:58,283 INFO L140 encePairwiseOnDemand]: 56/63 looper letters, 40 selfloop transitions, 41 changer transitions 0/163 dead transitions. [2024-05-12 12:37:58,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 163 transitions, 2416 flow [2024-05-12 12:37:58,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 12:37:58,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 12:37:58,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 224 transitions. [2024-05-12 12:37:58,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7111111111111111 [2024-05-12 12:37:58,287 INFO L175 Difference]: Start difference. First operand has 154 places, 168 transitions, 2435 flow. Second operand 5 states and 224 transitions. [2024-05-12 12:37:58,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 163 transitions, 2416 flow [2024-05-12 12:37:58,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 163 transitions, 2160 flow, removed 18 selfloop flow, removed 9 redundant places. [2024-05-12 12:37:58,336 INFO L231 Difference]: Finished difference. Result has 145 places, 150 transitions, 2043 flow [2024-05-12 12:37:58,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=1877, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2043, PETRI_PLACES=145, PETRI_TRANSITIONS=150} [2024-05-12 12:37:58,336 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 87 predicate places. [2024-05-12 12:37:58,336 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 150 transitions, 2043 flow [2024-05-12 12:37:58,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.75) internal successors, (155), 4 states have internal predecessors, (155), 0 states have call successors, (0), 0 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 12:37:58,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:37:58,337 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 12:37:58,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-05-12 12:37:58,337 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-05-12 12:37:58,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:37:58,338 INFO L85 PathProgramCache]: Analyzing trace with hash 1720640560, now seen corresponding path program 1 times [2024-05-12 12:37:58,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:37:58,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704079973] [2024-05-12 12:37:58,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:37:58,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:37:58,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:37:58,427 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 12:37:58,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:37:58,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704079973] [2024-05-12 12:37:58,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704079973] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:37:58,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:37:58,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:37:58,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791932415] [2024-05-12 12:37:58,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:37:58,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:37:58,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:37:58,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:37:58,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:37:58,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 63 [2024-05-12 12:37:58,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 150 transitions, 2043 flow. Second operand has 6 states, 6 states have (on average 30.166666666666668) internal successors, (181), 6 states have internal predecessors, (181), 0 states have call successors, (0), 0 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 12:37:58,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:37:58,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 63 [2024-05-12 12:37:58,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:37:58,765 INFO L124 PetriNetUnfolderBase]: 1102/2370 cut-off events. [2024-05-12 12:37:58,766 INFO L125 PetriNetUnfolderBase]: For 36713/36942 co-relation queries the response was YES. [2024-05-12 12:37:58,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12099 conditions, 2370 events. 1102/2370 cut-off events. For 36713/36942 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 16401 event pairs, 420 based on Foata normal form. 45/2306 useless extension candidates. Maximal degree in co-relation 9497. Up to 933 conditions per place. [2024-05-12 12:37:58,779 INFO L140 encePairwiseOnDemand]: 53/63 looper letters, 75 selfloop transitions, 66 changer transitions 2/170 dead transitions. [2024-05-12 12:37:58,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 170 transitions, 2504 flow [2024-05-12 12:37:58,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:37:58,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:37:58,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 228 transitions. [2024-05-12 12:37:58,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6031746031746031 [2024-05-12 12:37:58,781 INFO L175 Difference]: Start difference. First operand has 145 places, 150 transitions, 2043 flow. Second operand 6 states and 228 transitions. [2024-05-12 12:37:58,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 170 transitions, 2504 flow [2024-05-12 12:37:58,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 170 transitions, 2492 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-05-12 12:37:58,827 INFO L231 Difference]: Finished difference. Result has 150 places, 155 transitions, 2253 flow [2024-05-12 12:37:58,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=2031, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2253, PETRI_PLACES=150, PETRI_TRANSITIONS=155} [2024-05-12 12:37:58,827 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 92 predicate places. [2024-05-12 12:37:58,827 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 155 transitions, 2253 flow [2024-05-12 12:37:58,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 30.166666666666668) internal successors, (181), 6 states have internal predecessors, (181), 0 states have call successors, (0), 0 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 12:37:58,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:37:58,828 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 12:37:58,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-05-12 12:37:58,828 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-05-12 12:37:58,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:37:58,829 INFO L85 PathProgramCache]: Analyzing trace with hash -336501112, now seen corresponding path program 2 times [2024-05-12 12:37:58,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:37:58,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364653766] [2024-05-12 12:37:58,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:37:58,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:37:58,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:37:58,900 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 12:37:58,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:37:58,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364653766] [2024-05-12 12:37:58,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364653766] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:37:58,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:37:58,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:37:58,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702288938] [2024-05-12 12:37:58,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:37:58,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:37:58,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:37:58,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:37:58,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:37:58,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 63 [2024-05-12 12:37:58,958 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 155 transitions, 2253 flow. Second operand has 6 states, 6 states have (on average 30.166666666666668) internal successors, (181), 6 states have internal predecessors, (181), 0 states have call successors, (0), 0 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 12:37:58,958 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:37:58,958 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 63 [2024-05-12 12:37:58,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:37:59,210 INFO L124 PetriNetUnfolderBase]: 1103/2393 cut-off events. [2024-05-12 12:37:59,211 INFO L125 PetriNetUnfolderBase]: For 41670/41917 co-relation queries the response was YES. [2024-05-12 12:37:59,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12621 conditions, 2393 events. 1103/2393 cut-off events. For 41670/41917 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 16627 event pairs, 376 based on Foata normal form. 55/2338 useless extension candidates. Maximal degree in co-relation 9907. Up to 929 conditions per place. [2024-05-12 12:37:59,227 INFO L140 encePairwiseOnDemand]: 53/63 looper letters, 85 selfloop transitions, 62 changer transitions 4/178 dead transitions. [2024-05-12 12:37:59,227 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 178 transitions, 2750 flow [2024-05-12 12:37:59,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:37:59,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:37:59,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 232 transitions. [2024-05-12 12:37:59,228 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6137566137566137 [2024-05-12 12:37:59,228 INFO L175 Difference]: Start difference. First operand has 150 places, 155 transitions, 2253 flow. Second operand 6 states and 232 transitions. [2024-05-12 12:37:59,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 178 transitions, 2750 flow [2024-05-12 12:37:59,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 178 transitions, 2678 flow, removed 12 selfloop flow, removed 2 redundant places. [2024-05-12 12:37:59,291 INFO L231 Difference]: Finished difference. Result has 154 places, 158 transitions, 2366 flow [2024-05-12 12:37:59,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=2187, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2366, PETRI_PLACES=154, PETRI_TRANSITIONS=158} [2024-05-12 12:37:59,291 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 96 predicate places. [2024-05-12 12:37:59,291 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 158 transitions, 2366 flow [2024-05-12 12:37:59,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 30.166666666666668) internal successors, (181), 6 states have internal predecessors, (181), 0 states have call successors, (0), 0 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 12:37:59,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:37:59,292 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 12:37:59,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-05-12 12:37:59,292 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-05-12 12:37:59,292 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:37:59,293 INFO L85 PathProgramCache]: Analyzing trace with hash -351619192, now seen corresponding path program 3 times [2024-05-12 12:37:59,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:37:59,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000097604] [2024-05-12 12:37:59,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:37:59,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:37:59,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:37:59,364 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 12:37:59,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:37:59,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000097604] [2024-05-12 12:37:59,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000097604] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:37:59,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:37:59,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:37:59,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326031402] [2024-05-12 12:37:59,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:37:59,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:37:59,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:37:59,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:37:59,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:37:59,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 63 [2024-05-12 12:37:59,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 158 transitions, 2366 flow. Second operand has 6 states, 6 states have (on average 30.166666666666668) internal successors, (181), 6 states have internal predecessors, (181), 0 states have call successors, (0), 0 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 12:37:59,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:37:59,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 63 [2024-05-12 12:37:59,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:37:59,664 INFO L124 PetriNetUnfolderBase]: 1107/2397 cut-off events. [2024-05-12 12:37:59,664 INFO L125 PetriNetUnfolderBase]: For 44371/44605 co-relation queries the response was YES. [2024-05-12 12:37:59,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12957 conditions, 2397 events. 1107/2397 cut-off events. For 44371/44605 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 16624 event pairs, 374 based on Foata normal form. 70/2360 useless extension candidates. Maximal degree in co-relation 10776. Up to 929 conditions per place. [2024-05-12 12:37:59,678 INFO L140 encePairwiseOnDemand]: 53/63 looper letters, 86 selfloop transitions, 63 changer transitions 6/182 dead transitions. [2024-05-12 12:37:59,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 182 transitions, 2831 flow [2024-05-12 12:37:59,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:37:59,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:37:59,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 236 transitions. [2024-05-12 12:37:59,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6243386243386243 [2024-05-12 12:37:59,680 INFO L175 Difference]: Start difference. First operand has 154 places, 158 transitions, 2366 flow. Second operand 6 states and 236 transitions. [2024-05-12 12:37:59,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 182 transitions, 2831 flow [2024-05-12 12:37:59,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 182 transitions, 2701 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-05-12 12:37:59,741 INFO L231 Difference]: Finished difference. Result has 157 places, 158 transitions, 2371 flow [2024-05-12 12:37:59,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=2236, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2371, PETRI_PLACES=157, PETRI_TRANSITIONS=158} [2024-05-12 12:37:59,742 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 99 predicate places. [2024-05-12 12:37:59,742 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 158 transitions, 2371 flow [2024-05-12 12:37:59,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 30.166666666666668) internal successors, (181), 6 states have internal predecessors, (181), 0 states have call successors, (0), 0 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 12:37:59,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:37:59,742 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 12:37:59,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-05-12 12:37:59,742 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-05-12 12:37:59,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:37:59,743 INFO L85 PathProgramCache]: Analyzing trace with hash 1503595602, now seen corresponding path program 1 times [2024-05-12 12:37:59,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:37:59,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396235841] [2024-05-12 12:37:59,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:37:59,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:37:59,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:37:59,814 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 12:37:59,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:37:59,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396235841] [2024-05-12 12:37:59,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396235841] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:37:59,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:37:59,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:37:59,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807324638] [2024-05-12 12:37:59,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:37:59,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:37:59,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:37:59,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:37:59,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:37:59,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 63 [2024-05-12 12:37:59,867 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 158 transitions, 2371 flow. Second operand has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 0 states have call successors, (0), 0 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 12:37:59,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:37:59,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 63 [2024-05-12 12:37:59,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:38:00,152 INFO L124 PetriNetUnfolderBase]: 1170/2454 cut-off events. [2024-05-12 12:38:00,152 INFO L125 PetriNetUnfolderBase]: For 49206/49714 co-relation queries the response was YES. [2024-05-12 12:38:00,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13830 conditions, 2454 events. 1170/2454 cut-off events. For 49206/49714 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 17043 event pairs, 232 based on Foata normal form. 75/2362 useless extension candidates. Maximal degree in co-relation 11629. Up to 710 conditions per place. [2024-05-12 12:38:00,169 INFO L140 encePairwiseOnDemand]: 55/63 looper letters, 126 selfloop transitions, 32 changer transitions 4/189 dead transitions. [2024-05-12 12:38:00,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 189 transitions, 2891 flow [2024-05-12 12:38:00,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:38:00,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:38:00,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 239 transitions. [2024-05-12 12:38:00,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6322751322751323 [2024-05-12 12:38:00,172 INFO L175 Difference]: Start difference. First operand has 157 places, 158 transitions, 2371 flow. Second operand 6 states and 239 transitions. [2024-05-12 12:38:00,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 189 transitions, 2891 flow [2024-05-12 12:38:00,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 189 transitions, 2717 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-05-12 12:38:00,228 INFO L231 Difference]: Finished difference. Result has 158 places, 160 transitions, 2304 flow [2024-05-12 12:38:00,228 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=2197, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2304, PETRI_PLACES=158, PETRI_TRANSITIONS=160} [2024-05-12 12:38:00,228 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 100 predicate places. [2024-05-12 12:38:00,228 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 160 transitions, 2304 flow [2024-05-12 12:38:00,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 0 states have call successors, (0), 0 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 12:38:00,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:38:00,229 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 12:38:00,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-05-12 12:38:00,229 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-05-12 12:38:00,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:38:00,229 INFO L85 PathProgramCache]: Analyzing trace with hash -1067108894, now seen corresponding path program 2 times [2024-05-12 12:38:00,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:38:00,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545299157] [2024-05-12 12:38:00,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:38:00,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:38:00,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:38:00,334 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 12:38:00,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:38:00,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545299157] [2024-05-12 12:38:00,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545299157] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:38:00,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:38:00,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:38:00,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120562191] [2024-05-12 12:38:00,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:38:00,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:38:00,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:38:00,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:38:00,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:38:00,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 63 [2024-05-12 12:38:00,409 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 160 transitions, 2304 flow. Second operand has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 0 states have call successors, (0), 0 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 12:38:00,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:38:00,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 63 [2024-05-12 12:38:00,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:38:00,835 INFO L124 PetriNetUnfolderBase]: 1197/2522 cut-off events. [2024-05-12 12:38:00,835 INFO L125 PetriNetUnfolderBase]: For 50382/50857 co-relation queries the response was YES. [2024-05-12 12:38:00,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13957 conditions, 2522 events. 1197/2522 cut-off events. For 50382/50857 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 17775 event pairs, 239 based on Foata normal form. 80/2432 useless extension candidates. Maximal degree in co-relation 11839. Up to 718 conditions per place. [2024-05-12 12:38:00,854 INFO L140 encePairwiseOnDemand]: 54/63 looper letters, 126 selfloop transitions, 29 changer transitions 6/188 dead transitions. [2024-05-12 12:38:00,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 188 transitions, 2801 flow [2024-05-12 12:38:00,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:38:00,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:38:00,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 237 transitions. [2024-05-12 12:38:00,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.626984126984127 [2024-05-12 12:38:00,856 INFO L175 Difference]: Start difference. First operand has 158 places, 160 transitions, 2304 flow. Second operand 6 states and 237 transitions. [2024-05-12 12:38:00,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 188 transitions, 2801 flow [2024-05-12 12:38:00,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 188 transitions, 2754 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-05-12 12:38:00,932 INFO L231 Difference]: Finished difference. Result has 162 places, 162 transitions, 2365 flow [2024-05-12 12:38:00,932 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=2261, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2365, PETRI_PLACES=162, PETRI_TRANSITIONS=162} [2024-05-12 12:38:00,933 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 104 predicate places. [2024-05-12 12:38:00,933 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 162 transitions, 2365 flow [2024-05-12 12:38:00,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 0 states have call successors, (0), 0 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 12:38:00,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:38:00,933 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 12:38:00,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-05-12 12:38:00,933 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-05-12 12:38:00,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:38:00,934 INFO L85 PathProgramCache]: Analyzing trace with hash -2125663744, now seen corresponding path program 3 times [2024-05-12 12:38:00,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:38:00,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415943507] [2024-05-12 12:38:00,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:38:00,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:38:00,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:38:01,006 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 12:38:01,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:38:01,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415943507] [2024-05-12 12:38:01,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415943507] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:38:01,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:38:01,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:38:01,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327779982] [2024-05-12 12:38:01,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:38:01,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:38:01,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:38:01,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:38:01,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:38:01,049 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 63 [2024-05-12 12:38:01,051 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 162 transitions, 2365 flow. Second operand has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 0 states have call successors, (0), 0 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 12:38:01,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:38:01,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 63 [2024-05-12 12:38:01,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:38:01,340 INFO L124 PetriNetUnfolderBase]: 1153/2480 cut-off events. [2024-05-12 12:38:01,340 INFO L125 PetriNetUnfolderBase]: For 50499/50751 co-relation queries the response was YES. [2024-05-12 12:38:01,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13489 conditions, 2480 events. 1153/2480 cut-off events. For 50499/50751 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 17307 event pairs, 256 based on Foata normal form. 89/2446 useless extension candidates. Maximal degree in co-relation 11357. Up to 695 conditions per place. [2024-05-12 12:38:01,358 INFO L140 encePairwiseOnDemand]: 54/63 looper letters, 106 selfloop transitions, 49 changer transitions 2/184 dead transitions. [2024-05-12 12:38:01,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 184 transitions, 2806 flow [2024-05-12 12:38:01,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:38:01,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:38:01,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 234 transitions. [2024-05-12 12:38:01,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-05-12 12:38:01,359 INFO L175 Difference]: Start difference. First operand has 162 places, 162 transitions, 2365 flow. Second operand 6 states and 234 transitions. [2024-05-12 12:38:01,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 184 transitions, 2806 flow [2024-05-12 12:38:01,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 184 transitions, 2756 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-05-12 12:38:01,424 INFO L231 Difference]: Finished difference. Result has 165 places, 162 transitions, 2421 flow [2024-05-12 12:38:01,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=2315, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2421, PETRI_PLACES=165, PETRI_TRANSITIONS=162} [2024-05-12 12:38:01,425 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 107 predicate places. [2024-05-12 12:38:01,425 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 162 transitions, 2421 flow [2024-05-12 12:38:01,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 0 states have call successors, (0), 0 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 12:38:01,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:38:01,425 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 12:38:01,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-05-12 12:38:01,426 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-05-12 12:38:01,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:38:01,426 INFO L85 PathProgramCache]: Analyzing trace with hash 926774296, now seen corresponding path program 1 times [2024-05-12 12:38:01,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:38:01,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789766128] [2024-05-12 12:38:01,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:38:01,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:38:01,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:38:01,484 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 12:38:01,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:38:01,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789766128] [2024-05-12 12:38:01,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789766128] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:38:01,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:38:01,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 12:38:01,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873785685] [2024-05-12 12:38:01,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:38:01,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 12:38:01,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:38:01,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 12:38:01,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-05-12 12:38:01,516 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 63 [2024-05-12 12:38:01,516 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 162 transitions, 2421 flow. Second operand has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 0 states have call successors, (0), 0 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 12:38:01,516 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:38:01,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 63 [2024-05-12 12:38:01,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:38:01,770 INFO L124 PetriNetUnfolderBase]: 1127/2448 cut-off events. [2024-05-12 12:38:01,771 INFO L125 PetriNetUnfolderBase]: For 49513/49720 co-relation queries the response was YES. [2024-05-12 12:38:01,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13225 conditions, 2448 events. 1127/2448 cut-off events. For 49513/49720 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 16773 event pairs, 216 based on Foata normal form. 69/2405 useless extension candidates. Maximal degree in co-relation 12966. Up to 1201 conditions per place. [2024-05-12 12:38:01,787 INFO L140 encePairwiseOnDemand]: 54/63 looper letters, 115 selfloop transitions, 38 changer transitions 0/180 dead transitions. [2024-05-12 12:38:01,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 180 transitions, 2851 flow [2024-05-12 12:38:01,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 12:38:01,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 12:38:01,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 205 transitions. [2024-05-12 12:38:01,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6507936507936508 [2024-05-12 12:38:01,788 INFO L175 Difference]: Start difference. First operand has 165 places, 162 transitions, 2421 flow. Second operand 5 states and 205 transitions. [2024-05-12 12:38:01,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 180 transitions, 2851 flow [2024-05-12 12:38:01,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 180 transitions, 2743 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-05-12 12:38:01,855 INFO L231 Difference]: Finished difference. Result has 166 places, 162 transitions, 2406 flow [2024-05-12 12:38:01,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=2313, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2406, PETRI_PLACES=166, PETRI_TRANSITIONS=162} [2024-05-12 12:38:01,855 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 108 predicate places. [2024-05-12 12:38:01,856 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 162 transitions, 2406 flow [2024-05-12 12:38:01,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 0 states have call successors, (0), 0 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 12:38:01,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:38:01,856 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 12:38:01,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-05-12 12:38:01,856 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-05-12 12:38:01,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:38:01,857 INFO L85 PathProgramCache]: Analyzing trace with hash -24554251, now seen corresponding path program 1 times [2024-05-12 12:38:01,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:38:01,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628651036] [2024-05-12 12:38:01,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:38:01,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:38:01,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:38:01,932 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 12:38:01,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:38:01,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628651036] [2024-05-12 12:38:01,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628651036] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:38:01,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:38:01,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 12:38:01,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607809035] [2024-05-12 12:38:01,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:38:01,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 12:38:01,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:38:01,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 12:38:01,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-05-12 12:38:01,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 63 [2024-05-12 12:38:01,973 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 162 transitions, 2406 flow. Second operand has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 0 states have call successors, (0), 0 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 12:38:01,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:38:01,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 63 [2024-05-12 12:38:01,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:38:02,216 INFO L124 PetriNetUnfolderBase]: 1105/2389 cut-off events. [2024-05-12 12:38:02,216 INFO L125 PetriNetUnfolderBase]: For 46131/46329 co-relation queries the response was YES. [2024-05-12 12:38:02,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12794 conditions, 2389 events. 1105/2389 cut-off events. For 46131/46329 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 16050 event pairs, 263 based on Foata normal form. 63/2337 useless extension candidates. Maximal degree in co-relation 10636. Up to 1195 conditions per place. [2024-05-12 12:38:02,233 INFO L140 encePairwiseOnDemand]: 54/63 looper letters, 110 selfloop transitions, 40 changer transitions 0/177 dead transitions. [2024-05-12 12:38:02,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 177 transitions, 2826 flow [2024-05-12 12:38:02,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 12:38:02,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 12:38:02,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 202 transitions. [2024-05-12 12:38:02,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6412698412698413 [2024-05-12 12:38:02,234 INFO L175 Difference]: Start difference. First operand has 166 places, 162 transitions, 2406 flow. Second operand 5 states and 202 transitions. [2024-05-12 12:38:02,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 177 transitions, 2826 flow [2024-05-12 12:38:02,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 177 transitions, 2784 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-05-12 12:38:02,302 INFO L231 Difference]: Finished difference. Result has 169 places, 162 transitions, 2456 flow [2024-05-12 12:38:02,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=2364, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2456, PETRI_PLACES=169, PETRI_TRANSITIONS=162} [2024-05-12 12:38:02,302 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 111 predicate places. [2024-05-12 12:38:02,302 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 162 transitions, 2456 flow [2024-05-12 12:38:02,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 0 states have call successors, (0), 0 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 12:38:02,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:38:02,303 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:38:02,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-05-12 12:38:02,303 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-05-12 12:38:02,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:38:02,303 INFO L85 PathProgramCache]: Analyzing trace with hash -1841598119, now seen corresponding path program 1 times [2024-05-12 12:38:02,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:38:02,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738474822] [2024-05-12 12:38:02,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:38:02,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:38:02,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:38:02,369 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 12:38:02,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:38:02,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738474822] [2024-05-12 12:38:02,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738474822] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:38:02,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:38:02,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:38:02,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578109774] [2024-05-12 12:38:02,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:38:02,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:38:02,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:38:02,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:38:02,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:38:02,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 63 [2024-05-12 12:38:02,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 162 transitions, 2456 flow. Second operand has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 0 states have call successors, (0), 0 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 12:38:02,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:38:02,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 63 [2024-05-12 12:38:02,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:38:02,688 INFO L124 PetriNetUnfolderBase]: 1166/2506 cut-off events. [2024-05-12 12:38:02,688 INFO L125 PetriNetUnfolderBase]: For 52853/53295 co-relation queries the response was YES. [2024-05-12 12:38:02,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13983 conditions, 2506 events. 1166/2506 cut-off events. For 52853/53295 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 17184 event pairs, 373 based on Foata normal form. 58/2405 useless extension candidates. Maximal degree in co-relation 11393. Up to 1149 conditions per place. [2024-05-12 12:38:02,707 INFO L140 encePairwiseOnDemand]: 55/63 looper letters, 124 selfloop transitions, 30 changer transitions 2/183 dead transitions. [2024-05-12 12:38:02,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 183 transitions, 2961 flow [2024-05-12 12:38:02,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:38:02,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:38:02,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 227 transitions. [2024-05-12 12:38:02,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6005291005291006 [2024-05-12 12:38:02,709 INFO L175 Difference]: Start difference. First operand has 169 places, 162 transitions, 2456 flow. Second operand 6 states and 227 transitions. [2024-05-12 12:38:02,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 183 transitions, 2961 flow [2024-05-12 12:38:02,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 183 transitions, 2906 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-05-12 12:38:02,782 INFO L231 Difference]: Finished difference. Result has 172 places, 166 transitions, 2535 flow [2024-05-12 12:38:02,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=2401, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2535, PETRI_PLACES=172, PETRI_TRANSITIONS=166} [2024-05-12 12:38:02,782 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 114 predicate places. [2024-05-12 12:38:02,782 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 166 transitions, 2535 flow [2024-05-12 12:38:02,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 0 states have call successors, (0), 0 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 12:38:02,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:38:02,783 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 12:38:02,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-05-12 12:38:02,783 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-05-12 12:38:02,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:38:02,783 INFO L85 PathProgramCache]: Analyzing trace with hash 176567413, now seen corresponding path program 2 times [2024-05-12 12:38:02,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:38:02,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927296492] [2024-05-12 12:38:02,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:38:02,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:38:02,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:38:02,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:38:02,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:38:02,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927296492] [2024-05-12 12:38:02,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927296492] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:38:02,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:38:02,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:38:02,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755081107] [2024-05-12 12:38:02,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:38:02,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:38:02,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:38:02,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:38:02,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:38:02,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 63 [2024-05-12 12:38:02,881 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 166 transitions, 2535 flow. Second operand has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 0 states have call successors, (0), 0 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 12:38:02,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:38:02,881 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 63 [2024-05-12 12:38:02,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:38:03,155 INFO L124 PetriNetUnfolderBase]: 1100/2394 cut-off events. [2024-05-12 12:38:03,155 INFO L125 PetriNetUnfolderBase]: For 49987/50196 co-relation queries the response was YES. [2024-05-12 12:38:03,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13185 conditions, 2394 events. 1100/2394 cut-off events. For 49987/50196 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 16311 event pairs, 348 based on Foata normal form. 58/2324 useless extension candidates. Maximal degree in co-relation 12375. Up to 870 conditions per place. [2024-05-12 12:38:03,168 INFO L140 encePairwiseOnDemand]: 54/63 looper letters, 103 selfloop transitions, 51 changer transitions 0/181 dead transitions. [2024-05-12 12:38:03,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 181 transitions, 2923 flow [2024-05-12 12:38:03,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:38:03,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:38:03,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 225 transitions. [2024-05-12 12:38:03,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5952380952380952 [2024-05-12 12:38:03,169 INFO L175 Difference]: Start difference. First operand has 172 places, 166 transitions, 2535 flow. Second operand 6 states and 225 transitions. [2024-05-12 12:38:03,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 181 transitions, 2923 flow [2024-05-12 12:38:03,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 181 transitions, 2859 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-05-12 12:38:03,227 INFO L231 Difference]: Finished difference. Result has 174 places, 166 transitions, 2579 flow [2024-05-12 12:38:03,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=2471, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2579, PETRI_PLACES=174, PETRI_TRANSITIONS=166} [2024-05-12 12:38:03,228 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 116 predicate places. [2024-05-12 12:38:03,228 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 166 transitions, 2579 flow [2024-05-12 12:38:03,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 0 states have call successors, (0), 0 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 12:38:03,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:38:03,229 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 12:38:03,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-05-12 12:38:03,229 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-05-12 12:38:03,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:38:03,229 INFO L85 PathProgramCache]: Analyzing trace with hash 1766644489, now seen corresponding path program 3 times [2024-05-12 12:38:03,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:38:03,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927181313] [2024-05-12 12:38:03,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:38:03,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:38:03,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:38:03,292 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 12:38:03,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:38:03,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927181313] [2024-05-12 12:38:03,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927181313] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:38:03,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:38:03,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:38:03,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470671502] [2024-05-12 12:38:03,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:38:03,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:38:03,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:38:03,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:38:03,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:38:03,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 63 [2024-05-12 12:38:03,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 166 transitions, 2579 flow. Second operand has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 0 states have call successors, (0), 0 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 12:38:03,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:38:03,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 63 [2024-05-12 12:38:03,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:38:03,604 INFO L124 PetriNetUnfolderBase]: 1147/2467 cut-off events. [2024-05-12 12:38:03,605 INFO L125 PetriNetUnfolderBase]: For 52500/52968 co-relation queries the response was YES. [2024-05-12 12:38:03,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13773 conditions, 2467 events. 1147/2467 cut-off events. For 52500/52968 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 16840 event pairs, 364 based on Foata normal form. 75/2379 useless extension candidates. Maximal degree in co-relation 11282. Up to 1145 conditions per place. [2024-05-12 12:38:03,622 INFO L140 encePairwiseOnDemand]: 55/63 looper letters, 127 selfloop transitions, 30 changer transitions 4/188 dead transitions. [2024-05-12 12:38:03,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 188 transitions, 3097 flow [2024-05-12 12:38:03,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:38:03,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:38:03,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 232 transitions. [2024-05-12 12:38:03,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6137566137566137 [2024-05-12 12:38:03,639 INFO L175 Difference]: Start difference. First operand has 174 places, 166 transitions, 2579 flow. Second operand 6 states and 232 transitions. [2024-05-12 12:38:03,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 188 transitions, 3097 flow [2024-05-12 12:38:03,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 188 transitions, 2989 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-05-12 12:38:03,726 INFO L231 Difference]: Finished difference. Result has 176 places, 166 transitions, 2537 flow [2024-05-12 12:38:03,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=2471, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2537, PETRI_PLACES=176, PETRI_TRANSITIONS=166} [2024-05-12 12:38:03,727 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 118 predicate places. [2024-05-12 12:38:03,727 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 166 transitions, 2537 flow [2024-05-12 12:38:03,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 0 states have call successors, (0), 0 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 12:38:03,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:38:03,727 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 12:38:03,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-05-12 12:38:03,728 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-05-12 12:38:03,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:38:03,728 INFO L85 PathProgramCache]: Analyzing trace with hash -447482155, now seen corresponding path program 4 times [2024-05-12 12:38:03,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:38:03,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963886315] [2024-05-12 12:38:03,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:38:03,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:38:03,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:38:03,790 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 12:38:03,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:38:03,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963886315] [2024-05-12 12:38:03,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963886315] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:38:03,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:38:03,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:38:03,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113768328] [2024-05-12 12:38:03,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:38:03,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:38:03,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:38:03,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:38:03,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:38:03,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 63 [2024-05-12 12:38:03,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 166 transitions, 2537 flow. Second operand has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 0 states have call successors, (0), 0 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 12:38:03,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:38:03,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 63 [2024-05-12 12:38:03,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:38:04,108 INFO L124 PetriNetUnfolderBase]: 1147/2475 cut-off events. [2024-05-12 12:38:04,108 INFO L125 PetriNetUnfolderBase]: For 50658/51099 co-relation queries the response was YES. [2024-05-12 12:38:04,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13603 conditions, 2475 events. 1147/2475 cut-off events. For 50658/51099 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 16951 event pairs, 366 based on Foata normal form. 77/2392 useless extension candidates. Maximal degree in co-relation 11137. Up to 1145 conditions per place. [2024-05-12 12:38:04,123 INFO L140 encePairwiseOnDemand]: 56/63 looper letters, 124 selfloop transitions, 34 changer transitions 6/191 dead transitions. [2024-05-12 12:38:04,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 191 transitions, 3074 flow [2024-05-12 12:38:04,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:38:04,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:38:04,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 234 transitions. [2024-05-12 12:38:04,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-05-12 12:38:04,124 INFO L175 Difference]: Start difference. First operand has 176 places, 166 transitions, 2537 flow. Second operand 6 states and 234 transitions. [2024-05-12 12:38:04,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 191 transitions, 3074 flow [2024-05-12 12:38:04,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 191 transitions, 2980 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-05-12 12:38:04,192 INFO L231 Difference]: Finished difference. Result has 178 places, 166 transitions, 2517 flow [2024-05-12 12:38:04,192 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=2443, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2517, PETRI_PLACES=178, PETRI_TRANSITIONS=166} [2024-05-12 12:38:04,193 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 120 predicate places. [2024-05-12 12:38:04,193 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 166 transitions, 2517 flow [2024-05-12 12:38:04,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 0 states have call successors, (0), 0 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 12:38:04,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:38:04,193 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:38:04,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-05-12 12:38:04,193 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-05-12 12:38:04,194 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:38:04,194 INFO L85 PathProgramCache]: Analyzing trace with hash 1846405584, now seen corresponding path program 1 times [2024-05-12 12:38:04,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:38:04,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499942160] [2024-05-12 12:38:04,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:38:04,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:38:04,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:38:04,251 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 12:38:04,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:38:04,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499942160] [2024-05-12 12:38:04,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499942160] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:38:04,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:38:04,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:38:04,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429418009] [2024-05-12 12:38:04,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:38:04,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:38:04,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:38:04,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:38:04,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:38:04,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 63 [2024-05-12 12:38:04,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 166 transitions, 2517 flow. Second operand has 6 states, 6 states have (on average 30.666666666666668) internal successors, (184), 6 states have internal predecessors, (184), 0 states have call successors, (0), 0 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 12:38:04,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:38:04,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 63 [2024-05-12 12:38:04,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:38:04,568 INFO L124 PetriNetUnfolderBase]: 1179/2523 cut-off events. [2024-05-12 12:38:04,568 INFO L125 PetriNetUnfolderBase]: For 53358/53805 co-relation queries the response was YES. [2024-05-12 12:38:04,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13911 conditions, 2523 events. 1179/2523 cut-off events. For 53358/53805 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 17266 event pairs, 295 based on Foata normal form. 89/2447 useless extension candidates. Maximal degree in co-relation 11088. Up to 662 conditions per place. [2024-05-12 12:38:04,583 INFO L140 encePairwiseOnDemand]: 53/63 looper letters, 122 selfloop transitions, 35 changer transitions 13/197 dead transitions. [2024-05-12 12:38:04,583 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 197 transitions, 3087 flow [2024-05-12 12:38:04,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:38:04,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:38:04,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 244 transitions. [2024-05-12 12:38:04,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6455026455026455 [2024-05-12 12:38:04,584 INFO L175 Difference]: Start difference. First operand has 178 places, 166 transitions, 2517 flow. Second operand 6 states and 244 transitions. [2024-05-12 12:38:04,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 197 transitions, 3087 flow [2024-05-12 12:38:04,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 197 transitions, 3027 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-05-12 12:38:04,663 INFO L231 Difference]: Finished difference. Result has 181 places, 166 transitions, 2560 flow [2024-05-12 12:38:04,663 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=2460, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2560, PETRI_PLACES=181, PETRI_TRANSITIONS=166} [2024-05-12 12:38:04,663 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 123 predicate places. [2024-05-12 12:38:04,663 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 166 transitions, 2560 flow [2024-05-12 12:38:04,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 30.666666666666668) internal successors, (184), 6 states have internal predecessors, (184), 0 states have call successors, (0), 0 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 12:38:04,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:38:04,664 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:38:04,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-05-12 12:38:04,664 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-05-12 12:38:04,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:38:04,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1813337574, now seen corresponding path program 2 times [2024-05-12 12:38:04,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:38:04,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10562982] [2024-05-12 12:38:04,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:38:04,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:38:04,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:38:04,731 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 12:38:04,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:38:04,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10562982] [2024-05-12 12:38:04,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10562982] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:38:04,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:38:04,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:38:04,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258975099] [2024-05-12 12:38:04,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:38:04,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:38:04,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:38:04,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:38:04,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:38:04,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 63 [2024-05-12 12:38:04,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 166 transitions, 2560 flow. Second operand has 6 states, 6 states have (on average 30.666666666666668) internal successors, (184), 6 states have internal predecessors, (184), 0 states have call successors, (0), 0 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 12:38:04,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:38:04,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 63 [2024-05-12 12:38:04,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:38:05,119 INFO L124 PetriNetUnfolderBase]: 1177/2539 cut-off events. [2024-05-12 12:38:05,119 INFO L125 PetriNetUnfolderBase]: For 57106/57560 co-relation queries the response was YES. [2024-05-12 12:38:05,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14111 conditions, 2539 events. 1177/2539 cut-off events. For 57106/57560 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 17472 event pairs, 295 based on Foata normal form. 87/2468 useless extension candidates. Maximal degree in co-relation 11088. Up to 971 conditions per place. [2024-05-12 12:38:05,140 INFO L140 encePairwiseOnDemand]: 54/63 looper letters, 132 selfloop transitions, 24 changer transitions 9/192 dead transitions. [2024-05-12 12:38:05,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 192 transitions, 3034 flow [2024-05-12 12:38:05,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:38:05,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:38:05,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 241 transitions. [2024-05-12 12:38:05,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6375661375661376 [2024-05-12 12:38:05,141 INFO L175 Difference]: Start difference. First operand has 181 places, 166 transitions, 2560 flow. Second operand 6 states and 241 transitions. [2024-05-12 12:38:05,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 192 transitions, 3034 flow [2024-05-12 12:38:05,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 192 transitions, 2988 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-05-12 12:38:05,245 INFO L231 Difference]: Finished difference. Result has 184 places, 166 transitions, 2571 flow [2024-05-12 12:38:05,245 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=2514, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2571, PETRI_PLACES=184, PETRI_TRANSITIONS=166} [2024-05-12 12:38:05,246 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 126 predicate places. [2024-05-12 12:38:05,246 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 166 transitions, 2571 flow [2024-05-12 12:38:05,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 30.666666666666668) internal successors, (184), 6 states have internal predecessors, (184), 0 states have call successors, (0), 0 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 12:38:05,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:38:05,246 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:38:05,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-05-12 12:38:05,246 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-05-12 12:38:05,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:38:05,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1641618430, now seen corresponding path program 3 times [2024-05-12 12:38:05,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:38:05,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135213921] [2024-05-12 12:38:05,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:38:05,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:38:05,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:38:05,371 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 12:38:05,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:38:05,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135213921] [2024-05-12 12:38:05,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135213921] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:38:05,372 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:38:05,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:38:05,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613575574] [2024-05-12 12:38:05,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:38:05,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:38:05,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:38:05,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:38:05,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:38:05,422 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 63 [2024-05-12 12:38:05,423 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 166 transitions, 2571 flow. Second operand has 6 states, 6 states have (on average 30.666666666666668) internal successors, (184), 6 states have internal predecessors, (184), 0 states have call successors, (0), 0 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 12:38:05,423 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:38:05,423 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 63 [2024-05-12 12:38:05,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:38:05,697 INFO L124 PetriNetUnfolderBase]: 1118/2445 cut-off events. [2024-05-12 12:38:05,697 INFO L125 PetriNetUnfolderBase]: For 54248/54445 co-relation queries the response was YES. [2024-05-12 12:38:05,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13380 conditions, 2445 events. 1118/2445 cut-off events. For 54248/54445 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 16617 event pairs, 374 based on Foata normal form. 100/2425 useless extension candidates. Maximal degree in co-relation 10382. Up to 1006 conditions per place. [2024-05-12 12:38:05,716 INFO L140 encePairwiseOnDemand]: 52/63 looper letters, 95 selfloop transitions, 63 changer transitions 10/195 dead transitions. [2024-05-12 12:38:05,716 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 195 transitions, 3172 flow [2024-05-12 12:38:05,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:38:05,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:38:05,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 242 transitions. [2024-05-12 12:38:05,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6402116402116402 [2024-05-12 12:38:05,717 INFO L175 Difference]: Start difference. First operand has 184 places, 166 transitions, 2571 flow. Second operand 6 states and 242 transitions. [2024-05-12 12:38:05,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 195 transitions, 3172 flow [2024-05-12 12:38:05,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 195 transitions, 3124 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-05-12 12:38:05,811 INFO L231 Difference]: Finished difference. Result has 187 places, 166 transitions, 2692 flow [2024-05-12 12:38:05,811 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=2523, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2692, PETRI_PLACES=187, PETRI_TRANSITIONS=166} [2024-05-12 12:38:05,812 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 129 predicate places. [2024-05-12 12:38:05,812 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 166 transitions, 2692 flow [2024-05-12 12:38:05,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 30.666666666666668) internal successors, (184), 6 states have internal predecessors, (184), 0 states have call successors, (0), 0 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 12:38:05,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:38:05,812 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:38:05,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-05-12 12:38:05,813 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-05-12 12:38:05,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:38:05,813 INFO L85 PathProgramCache]: Analyzing trace with hash 1193895711, now seen corresponding path program 1 times [2024-05-12 12:38:05,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:38:05,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115877317] [2024-05-12 12:38:05,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:38:05,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:38:05,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:38:05,874 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 12:38:05,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:38:05,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115877317] [2024-05-12 12:38:05,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115877317] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:38:05,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:38:05,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:38:05,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511204837] [2024-05-12 12:38:05,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:38:05,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:38:05,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:38:05,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:38:05,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:38:05,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 63 [2024-05-12 12:38:05,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 166 transitions, 2692 flow. Second operand has 6 states, 6 states have (on average 30.166666666666668) internal successors, (181), 6 states have internal predecessors, (181), 0 states have call successors, (0), 0 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 12:38:05,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:38:05,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 63 [2024-05-12 12:38:05,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:38:06,259 INFO L124 PetriNetUnfolderBase]: 1102/2454 cut-off events. [2024-05-12 12:38:06,259 INFO L125 PetriNetUnfolderBase]: For 57114/57322 co-relation queries the response was YES. [2024-05-12 12:38:06,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13739 conditions, 2454 events. 1102/2454 cut-off events. For 57114/57322 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 16859 event pairs, 254 based on Foata normal form. 74/2408 useless extension candidates. Maximal degree in co-relation 10584. Up to 1063 conditions per place. [2024-05-12 12:38:06,277 INFO L140 encePairwiseOnDemand]: 53/63 looper letters, 113 selfloop transitions, 47 changer transitions 0/187 dead transitions. [2024-05-12 12:38:06,278 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 187 transitions, 3240 flow [2024-05-12 12:38:06,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:38:06,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:38:06,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 240 transitions. [2024-05-12 12:38:06,279 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6349206349206349 [2024-05-12 12:38:06,279 INFO L175 Difference]: Start difference. First operand has 187 places, 166 transitions, 2692 flow. Second operand 6 states and 240 transitions. [2024-05-12 12:38:06,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 187 transitions, 3240 flow [2024-05-12 12:38:06,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 187 transitions, 3186 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-05-12 12:38:06,366 INFO L231 Difference]: Finished difference. Result has 192 places, 166 transitions, 2737 flow [2024-05-12 12:38:06,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=2638, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2737, PETRI_PLACES=192, PETRI_TRANSITIONS=166} [2024-05-12 12:38:06,367 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 134 predicate places. [2024-05-12 12:38:06,367 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 166 transitions, 2737 flow [2024-05-12 12:38:06,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 30.166666666666668) internal successors, (181), 6 states have internal predecessors, (181), 0 states have call successors, (0), 0 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 12:38:06,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:38:06,368 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:38:06,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-05-12 12:38:06,368 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-05-12 12:38:06,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:38:06,368 INFO L85 PathProgramCache]: Analyzing trace with hash 411531147, now seen corresponding path program 1 times [2024-05-12 12:38:06,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:38:06,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318441309] [2024-05-12 12:38:06,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:38:06,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:38:06,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:38:06,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:38:06,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:38:06,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318441309] [2024-05-12 12:38:06,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318441309] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:38:06,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:38:06,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:38:06,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997714489] [2024-05-12 12:38:06,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:38:06,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:38:06,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:38:06,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:38:06,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:38:06,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 63 [2024-05-12 12:38:06,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 166 transitions, 2737 flow. Second operand has 6 states, 6 states have (on average 30.666666666666668) internal successors, (184), 6 states have internal predecessors, (184), 0 states have call successors, (0), 0 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 12:38:06,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:38:06,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 63 [2024-05-12 12:38:06,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:38:06,786 INFO L124 PetriNetUnfolderBase]: 1147/2510 cut-off events. [2024-05-12 12:38:06,786 INFO L125 PetriNetUnfolderBase]: For 64572/64762 co-relation queries the response was YES. [2024-05-12 12:38:06,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14368 conditions, 2510 events. 1147/2510 cut-off events. For 64572/64762 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 17112 event pairs, 399 based on Foata normal form. 99/2479 useless extension candidates. Maximal degree in co-relation 14156. Up to 1014 conditions per place. [2024-05-12 12:38:06,806 INFO L140 encePairwiseOnDemand]: 52/63 looper letters, 100 selfloop transitions, 64 changer transitions 4/195 dead transitions. [2024-05-12 12:38:06,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 195 transitions, 3392 flow [2024-05-12 12:38:06,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:38:06,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:38:06,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 240 transitions. [2024-05-12 12:38:06,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6349206349206349 [2024-05-12 12:38:06,807 INFO L175 Difference]: Start difference. First operand has 192 places, 166 transitions, 2737 flow. Second operand 6 states and 240 transitions. [2024-05-12 12:38:06,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 195 transitions, 3392 flow [2024-05-12 12:38:06,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 195 transitions, 3332 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-05-12 12:38:06,906 INFO L231 Difference]: Finished difference. Result has 197 places, 168 transitions, 2911 flow [2024-05-12 12:38:06,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=2677, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2911, PETRI_PLACES=197, PETRI_TRANSITIONS=168} [2024-05-12 12:38:06,907 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 139 predicate places. [2024-05-12 12:38:06,907 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 168 transitions, 2911 flow [2024-05-12 12:38:06,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 30.666666666666668) internal successors, (184), 6 states have internal predecessors, (184), 0 states have call successors, (0), 0 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 12:38:06,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:38:06,907 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:38:06,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-05-12 12:38:06,908 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-05-12 12:38:06,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:38:06,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1333559697, now seen corresponding path program 2 times [2024-05-12 12:38:06,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:38:06,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314178585] [2024-05-12 12:38:06,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:38:06,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:38:06,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:38:06,967 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 12:38:06,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:38:06,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314178585] [2024-05-12 12:38:06,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314178585] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:38:06,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:38:06,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:38:06,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564887117] [2024-05-12 12:38:06,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:38:06,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:38:06,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:38:06,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:38:06,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:38:07,041 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 63 [2024-05-12 12:38:07,041 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 168 transitions, 2911 flow. Second operand has 6 states, 6 states have (on average 30.666666666666668) internal successors, (184), 6 states have internal predecessors, (184), 0 states have call successors, (0), 0 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 12:38:07,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:38:07,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 63 [2024-05-12 12:38:07,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:38:07,408 INFO L124 PetriNetUnfolderBase]: 1209/2593 cut-off events. [2024-05-12 12:38:07,409 INFO L125 PetriNetUnfolderBase]: For 72464/72931 co-relation queries the response was YES. [2024-05-12 12:38:07,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15544 conditions, 2593 events. 1209/2593 cut-off events. For 72464/72931 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 17955 event pairs, 325 based on Foata normal form. 100/2512 useless extension candidates. Maximal degree in co-relation 13555. Up to 653 conditions per place. [2024-05-12 12:38:07,427 INFO L140 encePairwiseOnDemand]: 53/63 looper letters, 122 selfloop transitions, 35 changer transitions 8/192 dead transitions. [2024-05-12 12:38:07,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 192 transitions, 3440 flow [2024-05-12 12:38:07,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:38:07,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:38:07,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 239 transitions. [2024-05-12 12:38:07,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6322751322751323 [2024-05-12 12:38:07,428 INFO L175 Difference]: Start difference. First operand has 197 places, 168 transitions, 2911 flow. Second operand 6 states and 239 transitions. [2024-05-12 12:38:07,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 192 transitions, 3440 flow [2024-05-12 12:38:07,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 192 transitions, 3388 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-05-12 12:38:07,536 INFO L231 Difference]: Finished difference. Result has 203 places, 167 transitions, 2935 flow [2024-05-12 12:38:07,536 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=2859, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2935, PETRI_PLACES=203, PETRI_TRANSITIONS=167} [2024-05-12 12:38:07,536 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 145 predicate places. [2024-05-12 12:38:07,536 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 167 transitions, 2935 flow [2024-05-12 12:38:07,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 30.666666666666668) internal successors, (184), 6 states have internal predecessors, (184), 0 states have call successors, (0), 0 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 12:38:07,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:38:07,537 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:38:07,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-05-12 12:38:07,537 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-05-12 12:38:07,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:38:07,538 INFO L85 PathProgramCache]: Analyzing trace with hash -1103871087, now seen corresponding path program 3 times [2024-05-12 12:38:07,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:38:07,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768702227] [2024-05-12 12:38:07,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:38:07,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:38:07,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:38:07,608 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 12:38:07,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:38:07,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768702227] [2024-05-12 12:38:07,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768702227] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:38:07,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:38:07,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:38:07,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001590151] [2024-05-12 12:38:07,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:38:07,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:38:07,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:38:07,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:38:07,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:38:07,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 63 [2024-05-12 12:38:07,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 167 transitions, 2935 flow. Second operand has 6 states, 6 states have (on average 30.666666666666668) internal successors, (184), 6 states have internal predecessors, (184), 0 states have call successors, (0), 0 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 12:38:07,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:38:07,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 63 [2024-05-12 12:38:07,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:38:07,966 INFO L124 PetriNetUnfolderBase]: 1180/2557 cut-off events. [2024-05-12 12:38:07,966 INFO L125 PetriNetUnfolderBase]: For 73382/73865 co-relation queries the response was YES. [2024-05-12 12:38:07,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15364 conditions, 2557 events. 1180/2557 cut-off events. For 73382/73865 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 17749 event pairs, 324 based on Foata normal form. 90/2471 useless extension candidates. Maximal degree in co-relation 13355. Up to 1039 conditions per place. [2024-05-12 12:38:07,986 INFO L140 encePairwiseOnDemand]: 54/63 looper letters, 129 selfloop transitions, 26 changer transitions 3/185 dead transitions. [2024-05-12 12:38:07,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 185 transitions, 3355 flow [2024-05-12 12:38:07,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:38:07,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:38:07,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 235 transitions. [2024-05-12 12:38:07,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6216931216931217 [2024-05-12 12:38:07,987 INFO L175 Difference]: Start difference. First operand has 203 places, 167 transitions, 2935 flow. Second operand 6 states and 235 transitions. [2024-05-12 12:38:07,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 185 transitions, 3355 flow [2024-05-12 12:38:08,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 185 transitions, 3309 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-05-12 12:38:08,122 INFO L231 Difference]: Finished difference. Result has 206 places, 166 transitions, 2927 flow [2024-05-12 12:38:08,123 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=2889, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2927, PETRI_PLACES=206, PETRI_TRANSITIONS=166} [2024-05-12 12:38:08,123 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 148 predicate places. [2024-05-12 12:38:08,123 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 166 transitions, 2927 flow [2024-05-12 12:38:08,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 30.666666666666668) internal successors, (184), 6 states have internal predecessors, (184), 0 states have call successors, (0), 0 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 12:38:08,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:38:08,124 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:38:08,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-05-12 12:38:08,124 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-05-12 12:38:08,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:38:08,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1955729589, now seen corresponding path program 2 times [2024-05-12 12:38:08,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:38:08,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057801101] [2024-05-12 12:38:08,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:38:08,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:38:08,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:38:08,185 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 12:38:08,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:38:08,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057801101] [2024-05-12 12:38:08,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057801101] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:38:08,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:38:08,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:38:08,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230773978] [2024-05-12 12:38:08,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:38:08,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:38:08,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:38:08,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:38:08,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:38:08,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 63 [2024-05-12 12:38:08,242 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 166 transitions, 2927 flow. Second operand has 6 states, 6 states have (on average 30.166666666666668) internal successors, (181), 6 states have internal predecessors, (181), 0 states have call successors, (0), 0 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 12:38:08,242 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:38:08,242 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 63 [2024-05-12 12:38:08,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:38:08,614 INFO L124 PetriNetUnfolderBase]: 1115/2483 cut-off events. [2024-05-12 12:38:08,614 INFO L125 PetriNetUnfolderBase]: For 66673/66875 co-relation queries the response was YES. [2024-05-12 12:38:08,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14569 conditions, 2483 events. 1115/2483 cut-off events. For 66673/66875 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 16973 event pairs, 260 based on Foata normal form. 89/2443 useless extension candidates. Maximal degree in co-relation 12694. Up to 1111 conditions per place. [2024-05-12 12:38:08,631 INFO L140 encePairwiseOnDemand]: 53/63 looper letters, 119 selfloop transitions, 41 changer transitions 0/187 dead transitions. [2024-05-12 12:38:08,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 187 transitions, 3499 flow [2024-05-12 12:38:08,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:38:08,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:38:08,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 239 transitions. [2024-05-12 12:38:08,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6322751322751323 [2024-05-12 12:38:08,633 INFO L175 Difference]: Start difference. First operand has 206 places, 166 transitions, 2927 flow. Second operand 6 states and 239 transitions. [2024-05-12 12:38:08,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 187 transitions, 3499 flow [2024-05-12 12:38:08,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 187 transitions, 3445 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-05-12 12:38:08,749 INFO L231 Difference]: Finished difference. Result has 208 places, 166 transitions, 2961 flow [2024-05-12 12:38:08,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=2873, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2961, PETRI_PLACES=208, PETRI_TRANSITIONS=166} [2024-05-12 12:38:08,749 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 150 predicate places. [2024-05-12 12:38:08,750 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 166 transitions, 2961 flow [2024-05-12 12:38:08,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 30.166666666666668) internal successors, (181), 6 states have internal predecessors, (181), 0 states have call successors, (0), 0 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 12:38:08,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:38:08,750 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:38:08,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-05-12 12:38:08,750 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-05-12 12:38:08,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:38:08,751 INFO L85 PathProgramCache]: Analyzing trace with hash -1034785153, now seen corresponding path program 1 times [2024-05-12 12:38:08,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:38:08,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021013127] [2024-05-12 12:38:08,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:38:08,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:38:08,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:38:08,782 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 12:38:08,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:38:08,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021013127] [2024-05-12 12:38:08,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021013127] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:38:08,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:38:08,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:38:08,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269107342] [2024-05-12 12:38:08,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:38:08,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-05-12 12:38:08,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:38:08,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-05-12 12:38:08,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-05-12 12:38:08,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 63 [2024-05-12 12:38:08,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 166 transitions, 2961 flow. Second operand has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 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 12:38:08,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:38:08,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 63 [2024-05-12 12:38:08,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:38:09,142 INFO L124 PetriNetUnfolderBase]: 1261/2733 cut-off events. [2024-05-12 12:38:09,142 INFO L125 PetriNetUnfolderBase]: For 52548/52663 co-relation queries the response was YES. [2024-05-12 12:38:09,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14480 conditions, 2733 events. 1261/2733 cut-off events. For 52548/52663 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 18723 event pairs, 282 based on Foata normal form. 12/2474 useless extension candidates. Maximal degree in co-relation 13060. Up to 740 conditions per place. [2024-05-12 12:38:09,163 INFO L140 encePairwiseOnDemand]: 53/63 looper letters, 54 selfloop transitions, 25 changer transitions 9/196 dead transitions. [2024-05-12 12:38:09,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 196 transitions, 3283 flow [2024-05-12 12:38:09,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 12:38:09,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 12:38:09,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 223 transitions. [2024-05-12 12:38:09,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.707936507936508 [2024-05-12 12:38:09,165 INFO L175 Difference]: Start difference. First operand has 208 places, 166 transitions, 2961 flow. Second operand 5 states and 223 transitions. [2024-05-12 12:38:09,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 196 transitions, 3283 flow [2024-05-12 12:38:09,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 196 transitions, 3193 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-05-12 12:38:09,288 INFO L231 Difference]: Finished difference. Result has 210 places, 173 transitions, 2986 flow [2024-05-12 12:38:09,289 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=2833, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2986, PETRI_PLACES=210, PETRI_TRANSITIONS=173} [2024-05-12 12:38:09,289 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 152 predicate places. [2024-05-12 12:38:09,289 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 173 transitions, 2986 flow [2024-05-12 12:38:09,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 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 12:38:09,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:38:09,290 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:38:09,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-05-12 12:38:09,290 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-05-12 12:38:09,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:38:09,290 INFO L85 PathProgramCache]: Analyzing trace with hash -842023787, now seen corresponding path program 2 times [2024-05-12 12:38:09,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:38:09,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625477181] [2024-05-12 12:38:09,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:38:09,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:38:09,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:38:09,363 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 12:38:09,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:38:09,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625477181] [2024-05-12 12:38:09,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625477181] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:38:09,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:38:09,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:38:09,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986858501] [2024-05-12 12:38:09,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:38:09,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:38:09,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:38:09,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:38:09,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:38:09,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 63 [2024-05-12 12:38:09,406 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 173 transitions, 2986 flow. Second operand has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 0 states have call successors, (0), 0 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 12:38:09,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:38:09,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 63 [2024-05-12 12:38:09,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:38:09,741 INFO L124 PetriNetUnfolderBase]: 1140/2517 cut-off events. [2024-05-12 12:38:09,742 INFO L125 PetriNetUnfolderBase]: For 69193/69392 co-relation queries the response was YES. [2024-05-12 12:38:09,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15135 conditions, 2517 events. 1140/2517 cut-off events. For 69193/69392 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 17116 event pairs, 348 based on Foata normal form. 41/2449 useless extension candidates. Maximal degree in co-relation 14957. Up to 1009 conditions per place. [2024-05-12 12:38:09,757 INFO L140 encePairwiseOnDemand]: 54/63 looper letters, 96 selfloop transitions, 69 changer transitions 1/199 dead transitions. [2024-05-12 12:38:09,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 199 transitions, 3596 flow [2024-05-12 12:38:09,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:38:09,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:38:09,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 234 transitions. [2024-05-12 12:38:09,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-05-12 12:38:09,759 INFO L175 Difference]: Start difference. First operand has 210 places, 173 transitions, 2986 flow. Second operand 6 states and 234 transitions. [2024-05-12 12:38:09,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 199 transitions, 3596 flow [2024-05-12 12:38:09,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 199 transitions, 3594 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-05-12 12:38:09,901 INFO L231 Difference]: Finished difference. Result has 214 places, 173 transitions, 3128 flow [2024-05-12 12:38:09,901 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=2984, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3128, PETRI_PLACES=214, PETRI_TRANSITIONS=173} [2024-05-12 12:38:09,902 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 156 predicate places. [2024-05-12 12:38:09,902 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 173 transitions, 3128 flow [2024-05-12 12:38:09,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 0 states have call successors, (0), 0 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 12:38:09,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:38:09,902 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:38:09,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-05-12 12:38:09,903 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-05-12 12:38:09,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:38:09,903 INFO L85 PathProgramCache]: Analyzing trace with hash -1144000241, now seen corresponding path program 3 times [2024-05-12 12:38:09,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:38:09,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186847155] [2024-05-12 12:38:09,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:38:09,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:38:09,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:38:09,978 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 12:38:09,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:38:09,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186847155] [2024-05-12 12:38:09,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186847155] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:38:09,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:38:09,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:38:09,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728287540] [2024-05-12 12:38:09,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:38:09,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:38:09,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:38:09,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:38:09,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:38:10,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 63 [2024-05-12 12:38:10,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 173 transitions, 3128 flow. Second operand has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 0 states have call successors, (0), 0 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 12:38:10,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:38:10,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 63 [2024-05-12 12:38:10,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:38:10,372 INFO L124 PetriNetUnfolderBase]: 1145/2533 cut-off events. [2024-05-12 12:38:10,373 INFO L125 PetriNetUnfolderBase]: For 74200/74402 co-relation queries the response was YES. [2024-05-12 12:38:10,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15678 conditions, 2533 events. 1145/2533 cut-off events. For 74200/74402 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 17229 event pairs, 352 based on Foata normal form. 42/2466 useless extension candidates. Maximal degree in co-relation 15492. Up to 1009 conditions per place. [2024-05-12 12:38:10,395 INFO L140 encePairwiseOnDemand]: 54/63 looper letters, 105 selfloop transitions, 62 changer transitions 0/200 dead transitions. [2024-05-12 12:38:10,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 200 transitions, 3684 flow [2024-05-12 12:38:10,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:38:10,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:38:10,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 233 transitions. [2024-05-12 12:38:10,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6164021164021164 [2024-05-12 12:38:10,396 INFO L175 Difference]: Start difference. First operand has 214 places, 173 transitions, 3128 flow. Second operand 6 states and 233 transitions. [2024-05-12 12:38:10,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 200 transitions, 3684 flow [2024-05-12 12:38:10,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 200 transitions, 3565 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-05-12 12:38:10,542 INFO L231 Difference]: Finished difference. Result has 216 places, 173 transitions, 3139 flow [2024-05-12 12:38:10,542 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=3009, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3139, PETRI_PLACES=216, PETRI_TRANSITIONS=173} [2024-05-12 12:38:10,542 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 158 predicate places. [2024-05-12 12:38:10,542 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 173 transitions, 3139 flow [2024-05-12 12:38:10,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 0 states have call successors, (0), 0 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 12:38:10,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:38:10,543 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:38:10,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-05-12 12:38:10,543 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-05-12 12:38:10,543 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:38:10,543 INFO L85 PathProgramCache]: Analyzing trace with hash 1309138065, now seen corresponding path program 4 times [2024-05-12 12:38:10,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:38:10,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209281019] [2024-05-12 12:38:10,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:38:10,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:38:10,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:38:10,606 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 12:38:10,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:38:10,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209281019] [2024-05-12 12:38:10,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209281019] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:38:10,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:38:10,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:38:10,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896350767] [2024-05-12 12:38:10,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:38:10,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:38:10,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:38:10,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:38:10,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:38:10,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 63 [2024-05-12 12:38:10,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 173 transitions, 3139 flow. Second operand has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 0 states have call successors, (0), 0 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 12:38:10,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:38:10,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 63 [2024-05-12 12:38:10,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:38:11,023 INFO L124 PetriNetUnfolderBase]: 1136/2523 cut-off events. [2024-05-12 12:38:11,024 INFO L125 PetriNetUnfolderBase]: For 73331/73530 co-relation queries the response was YES. [2024-05-12 12:38:11,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15550 conditions, 2523 events. 1136/2523 cut-off events. For 73331/73530 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 17061 event pairs, 346 based on Foata normal form. 45/2463 useless extension candidates. Maximal degree in co-relation 15363. Up to 1009 conditions per place. [2024-05-12 12:38:11,047 INFO L140 encePairwiseOnDemand]: 53/63 looper letters, 91 selfloop transitions, 73 changer transitions 2/199 dead transitions. [2024-05-12 12:38:11,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 199 transitions, 3623 flow [2024-05-12 12:38:11,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:38:11,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:38:11,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 232 transitions. [2024-05-12 12:38:11,048 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6137566137566137 [2024-05-12 12:38:11,048 INFO L175 Difference]: Start difference. First operand has 216 places, 173 transitions, 3139 flow. Second operand 6 states and 232 transitions. [2024-05-12 12:38:11,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 199 transitions, 3623 flow [2024-05-12 12:38:11,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 199 transitions, 3365 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-05-12 12:38:11,190 INFO L231 Difference]: Finished difference. Result has 214 places, 173 transitions, 3037 flow [2024-05-12 12:38:11,190 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=2881, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3037, PETRI_PLACES=214, PETRI_TRANSITIONS=173} [2024-05-12 12:38:11,190 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 156 predicate places. [2024-05-12 12:38:11,191 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 173 transitions, 3037 flow [2024-05-12 12:38:11,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 0 states have call successors, (0), 0 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 12:38:11,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:38:11,191 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:38:11,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-05-12 12:38:11,191 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-05-12 12:38:11,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:38:11,192 INFO L85 PathProgramCache]: Analyzing trace with hash -207508790, now seen corresponding path program 1 times [2024-05-12 12:38:11,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:38:11,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750597928] [2024-05-12 12:38:11,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:38:11,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:38:11,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:38:11,267 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 12:38:11,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:38:11,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750597928] [2024-05-12 12:38:11,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750597928] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:38:11,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:38:11,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:38:11,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849956096] [2024-05-12 12:38:11,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:38:11,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:38:11,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:38:11,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:38:11,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:38:11,318 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 63 [2024-05-12 12:38:11,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 173 transitions, 3037 flow. Second operand has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 0 states have call successors, (0), 0 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 12:38:11,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:38:11,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 63 [2024-05-12 12:38:11,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:38:11,663 INFO L124 PetriNetUnfolderBase]: 1142/2538 cut-off events. [2024-05-12 12:38:11,664 INFO L125 PetriNetUnfolderBase]: For 70397/70601 co-relation queries the response was YES. [2024-05-12 12:38:11,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15298 conditions, 2538 events. 1142/2538 cut-off events. For 70397/70601 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 17100 event pairs, 348 based on Foata normal form. 42/2476 useless extension candidates. Maximal degree in co-relation 13020. Up to 1047 conditions per place. [2024-05-12 12:38:11,683 INFO L140 encePairwiseOnDemand]: 53/63 looper letters, 91 selfloop transitions, 68 changer transitions 0/192 dead transitions. [2024-05-12 12:38:11,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 192 transitions, 3547 flow [2024-05-12 12:38:11,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:38:11,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:38:11,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 230 transitions. [2024-05-12 12:38:11,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6084656084656085 [2024-05-12 12:38:11,685 INFO L175 Difference]: Start difference. First operand has 214 places, 173 transitions, 3037 flow. Second operand 6 states and 230 transitions. [2024-05-12 12:38:11,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 192 transitions, 3547 flow [2024-05-12 12:38:11,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 192 transitions, 3336 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-05-12 12:38:11,819 INFO L231 Difference]: Finished difference. Result has 212 places, 173 transitions, 2971 flow [2024-05-12 12:38:11,819 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=2826, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2971, PETRI_PLACES=212, PETRI_TRANSITIONS=173} [2024-05-12 12:38:11,819 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 154 predicate places. [2024-05-12 12:38:11,819 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 173 transitions, 2971 flow [2024-05-12 12:38:11,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 0 states have call successors, (0), 0 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 12:38:11,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:38:11,820 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:38:11,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-05-12 12:38:11,820 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-05-12 12:38:11,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:38:11,821 INFO L85 PathProgramCache]: Analyzing trace with hash -90241578, now seen corresponding path program 2 times [2024-05-12 12:38:11,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:38:11,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068633100] [2024-05-12 12:38:11,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:38:11,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:38:11,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:38:11,883 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 12:38:11,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:38:11,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068633100] [2024-05-12 12:38:11,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068633100] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:38:11,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:38:11,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:38:11,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702623194] [2024-05-12 12:38:11,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:38:11,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:38:11,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:38:11,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:38:11,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:38:11,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 63 [2024-05-12 12:38:11,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 173 transitions, 2971 flow. Second operand has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 0 states have call successors, (0), 0 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 12:38:11,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:38:11,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 63 [2024-05-12 12:38:11,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:38:12,241 INFO L124 PetriNetUnfolderBase]: 1136/2525 cut-off events. [2024-05-12 12:38:12,242 INFO L125 PetriNetUnfolderBase]: For 68794/68998 co-relation queries the response was YES. [2024-05-12 12:38:12,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14937 conditions, 2525 events. 1136/2525 cut-off events. For 68794/68998 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 16944 event pairs, 347 based on Foata normal form. 82/2502 useless extension candidates. Maximal degree in co-relation 12693. Up to 1046 conditions per place. [2024-05-12 12:38:12,261 INFO L140 encePairwiseOnDemand]: 54/63 looper letters, 98 selfloop transitions, 61 changer transitions 0/192 dead transitions. [2024-05-12 12:38:12,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 192 transitions, 3563 flow [2024-05-12 12:38:12,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:38:12,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:38:12,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 229 transitions. [2024-05-12 12:38:12,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6058201058201058 [2024-05-12 12:38:12,263 INFO L175 Difference]: Start difference. First operand has 212 places, 173 transitions, 2971 flow. Second operand 6 states and 229 transitions. [2024-05-12 12:38:12,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 192 transitions, 3563 flow [2024-05-12 12:38:12,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 192 transitions, 3344 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-05-12 12:38:12,395 INFO L231 Difference]: Finished difference. Result has 211 places, 173 transitions, 2881 flow [2024-05-12 12:38:12,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=2752, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2881, PETRI_PLACES=211, PETRI_TRANSITIONS=173} [2024-05-12 12:38:12,396 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 153 predicate places. [2024-05-12 12:38:12,396 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 173 transitions, 2881 flow [2024-05-12 12:38:12,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 0 states have call successors, (0), 0 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 12:38:12,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:38:12,396 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:38:12,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-05-12 12:38:12,397 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-05-12 12:38:12,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:38:12,397 INFO L85 PathProgramCache]: Analyzing trace with hash -223567556, now seen corresponding path program 3 times [2024-05-12 12:38:12,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:38:12,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496646046] [2024-05-12 12:38:12,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:38:12,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:38:12,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:38:12,462 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 12:38:12,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:38:12,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496646046] [2024-05-12 12:38:12,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496646046] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:38:12,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:38:12,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:38:12,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771182570] [2024-05-12 12:38:12,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:38:12,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:38:12,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:38:12,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:38:12,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:38:12,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 63 [2024-05-12 12:38:12,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 173 transitions, 2881 flow. Second operand has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 0 states have call successors, (0), 0 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 12:38:12,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:38:12,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 63 [2024-05-12 12:38:12,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:38:12,953 INFO L124 PetriNetUnfolderBase]: 1139/2529 cut-off events. [2024-05-12 12:38:12,954 INFO L125 PetriNetUnfolderBase]: For 65735/65939 co-relation queries the response was YES. [2024-05-12 12:38:12,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14662 conditions, 2529 events. 1139/2529 cut-off events. For 65735/65939 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 16849 event pairs, 347 based on Foata normal form. 54/2479 useless extension candidates. Maximal degree in co-relation 10402. Up to 1047 conditions per place. [2024-05-12 12:38:12,993 INFO L140 encePairwiseOnDemand]: 54/63 looper letters, 100 selfloop transitions, 57 changer transitions 0/190 dead transitions. [2024-05-12 12:38:12,993 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 190 transitions, 3391 flow [2024-05-12 12:38:12,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:38:12,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:38:12,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 227 transitions. [2024-05-12 12:38:12,994 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6005291005291006 [2024-05-12 12:38:12,994 INFO L175 Difference]: Start difference. First operand has 211 places, 173 transitions, 2881 flow. Second operand 6 states and 227 transitions. [2024-05-12 12:38:12,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 190 transitions, 3391 flow [2024-05-12 12:38:13,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 190 transitions, 3285 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-05-12 12:38:13,138 INFO L231 Difference]: Finished difference. Result has 213 places, 173 transitions, 2894 flow [2024-05-12 12:38:13,139 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=2775, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2894, PETRI_PLACES=213, PETRI_TRANSITIONS=173} [2024-05-12 12:38:13,139 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 155 predicate places. [2024-05-12 12:38:13,139 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 173 transitions, 2894 flow [2024-05-12 12:38:13,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 0 states have call successors, (0), 0 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 12:38:13,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:38:13,139 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:38:13,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-05-12 12:38:13,140 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-05-12 12:38:13,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:38:13,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1225958897, now seen corresponding path program 1 times [2024-05-12 12:38:13,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:38:13,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751290397] [2024-05-12 12:38:13,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:38:13,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:38:13,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:38:13,236 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 12:38:13,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:38:13,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751290397] [2024-05-12 12:38:13,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751290397] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:38:13,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:38:13,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:38:13,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048950467] [2024-05-12 12:38:13,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:38:13,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:38:13,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:38:13,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:38:13,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:38:13,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 63 [2024-05-12 12:38:13,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 173 transitions, 2894 flow. Second operand has 6 states, 6 states have (on average 30.5) internal successors, (183), 6 states have internal predecessors, (183), 0 states have call successors, (0), 0 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 12:38:13,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:38:13,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 63 [2024-05-12 12:38:13,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:38:13,625 INFO L124 PetriNetUnfolderBase]: 1207/2617 cut-off events. [2024-05-12 12:38:13,625 INFO L125 PetriNetUnfolderBase]: For 73941/74362 co-relation queries the response was YES. [2024-05-12 12:38:13,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15556 conditions, 2617 events. 1207/2617 cut-off events. For 73941/74362 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 17637 event pairs, 213 based on Foata normal form. 50/2515 useless extension candidates. Maximal degree in co-relation 11554. Up to 760 conditions per place. [2024-05-12 12:38:13,643 INFO L140 encePairwiseOnDemand]: 55/63 looper letters, 121 selfloop transitions, 37 changer transitions 2/193 dead transitions. [2024-05-12 12:38:13,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 193 transitions, 3449 flow [2024-05-12 12:38:13,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:38:13,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:38:13,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 225 transitions. [2024-05-12 12:38:13,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5952380952380952 [2024-05-12 12:38:13,648 INFO L175 Difference]: Start difference. First operand has 213 places, 173 transitions, 2894 flow. Second operand 6 states and 225 transitions. [2024-05-12 12:38:13,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 193 transitions, 3449 flow [2024-05-12 12:38:13,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 193 transitions, 3235 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-05-12 12:38:13,771 INFO L231 Difference]: Finished difference. Result has 211 places, 174 transitions, 2785 flow [2024-05-12 12:38:13,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=2682, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2785, PETRI_PLACES=211, PETRI_TRANSITIONS=174} [2024-05-12 12:38:13,774 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 153 predicate places. [2024-05-12 12:38:13,774 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 174 transitions, 2785 flow [2024-05-12 12:38:13,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 30.5) internal successors, (183), 6 states have internal predecessors, (183), 0 states have call successors, (0), 0 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 12:38:13,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:38:13,774 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:38:13,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-05-12 12:38:13,775 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-05-12 12:38:13,775 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:38:13,775 INFO L85 PathProgramCache]: Analyzing trace with hash 120556731, now seen corresponding path program 2 times [2024-05-12 12:38:13,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:38:13,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674669360] [2024-05-12 12:38:13,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:38:13,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:38:13,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:38:13,835 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 12:38:13,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:38:13,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674669360] [2024-05-12 12:38:13,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674669360] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:38:13,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:38:13,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:38:13,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709337713] [2024-05-12 12:38:13,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:38:13,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:38:13,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:38:13,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:38:13,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:38:13,904 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 63 [2024-05-12 12:38:13,905 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 174 transitions, 2785 flow. Second operand has 6 states, 6 states have (on average 30.5) internal successors, (183), 6 states have internal predecessors, (183), 0 states have call successors, (0), 0 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 12:38:13,905 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:38:13,905 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 63 [2024-05-12 12:38:13,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:38:14,290 INFO L124 PetriNetUnfolderBase]: 1195/2591 cut-off events. [2024-05-12 12:38:14,291 INFO L125 PetriNetUnfolderBase]: For 67656/68040 co-relation queries the response was YES. [2024-05-12 12:38:14,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14926 conditions, 2591 events. 1195/2591 cut-off events. For 67656/68040 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 17407 event pairs, 201 based on Foata normal form. 46/2481 useless extension candidates. Maximal degree in co-relation 11223. Up to 760 conditions per place. [2024-05-12 12:38:14,307 INFO L140 encePairwiseOnDemand]: 55/63 looper letters, 123 selfloop transitions, 32 changer transitions 4/192 dead transitions. [2024-05-12 12:38:14,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 192 transitions, 3311 flow [2024-05-12 12:38:14,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:38:14,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:38:14,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 225 transitions. [2024-05-12 12:38:14,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5952380952380952 [2024-05-12 12:38:14,308 INFO L175 Difference]: Start difference. First operand has 211 places, 174 transitions, 2785 flow. Second operand 6 states and 225 transitions. [2024-05-12 12:38:14,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 192 transitions, 3311 flow [2024-05-12 12:38:14,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 192 transitions, 3239 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-05-12 12:38:14,425 INFO L231 Difference]: Finished difference. Result has 213 places, 174 transitions, 2781 flow [2024-05-12 12:38:14,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=2713, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2781, PETRI_PLACES=213, PETRI_TRANSITIONS=174} [2024-05-12 12:38:14,426 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 155 predicate places. [2024-05-12 12:38:14,426 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 174 transitions, 2781 flow [2024-05-12 12:38:14,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 30.5) internal successors, (183), 6 states have internal predecessors, (183), 0 states have call successors, (0), 0 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 12:38:14,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:38:14,426 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:38:14,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-05-12 12:38:14,426 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-05-12 12:38:14,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:38:14,427 INFO L85 PathProgramCache]: Analyzing trace with hash -1904436619, now seen corresponding path program 3 times [2024-05-12 12:38:14,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:38:14,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163002915] [2024-05-12 12:38:14,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:38:14,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:38:14,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:38:14,492 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 12:38:14,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:38:14,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163002915] [2024-05-12 12:38:14,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163002915] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:38:14,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:38:14,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:38:14,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459313064] [2024-05-12 12:38:14,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:38:14,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:38:14,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:38:14,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:38:14,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:38:14,548 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 63 [2024-05-12 12:38:14,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 174 transitions, 2781 flow. Second operand has 6 states, 6 states have (on average 30.5) internal successors, (183), 6 states have internal predecessors, (183), 0 states have call successors, (0), 0 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 12:38:14,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:38:14,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 63 [2024-05-12 12:38:14,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:38:14,860 INFO L124 PetriNetUnfolderBase]: 1161/2571 cut-off events. [2024-05-12 12:38:14,861 INFO L125 PetriNetUnfolderBase]: For 62568/62796 co-relation queries the response was YES. [2024-05-12 12:38:14,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14141 conditions, 2571 events. 1161/2571 cut-off events. For 62568/62796 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 17151 event pairs, 159 based on Foata normal form. 51/2510 useless extension candidates. Maximal degree in co-relation 10929. Up to 733 conditions per place. [2024-05-12 12:38:14,877 INFO L140 encePairwiseOnDemand]: 54/63 looper letters, 102 selfloop transitions, 52 changer transitions 6/193 dead transitions. [2024-05-12 12:38:14,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 193 transitions, 3319 flow [2024-05-12 12:38:14,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:38:14,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:38:14,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 227 transitions. [2024-05-12 12:38:14,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6005291005291006 [2024-05-12 12:38:14,878 INFO L175 Difference]: Start difference. First operand has 213 places, 174 transitions, 2781 flow. Second operand 6 states and 227 transitions. [2024-05-12 12:38:14,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 193 transitions, 3319 flow [2024-05-12 12:38:14,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 193 transitions, 3235 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-05-12 12:38:14,985 INFO L231 Difference]: Finished difference. Result has 214 places, 172 transitions, 2775 flow [2024-05-12 12:38:14,985 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=2697, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2775, PETRI_PLACES=214, PETRI_TRANSITIONS=172} [2024-05-12 12:38:14,986 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 156 predicate places. [2024-05-12 12:38:14,990 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 172 transitions, 2775 flow [2024-05-12 12:38:14,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 30.5) internal successors, (183), 6 states have internal predecessors, (183), 0 states have call successors, (0), 0 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 12:38:14,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:38:14,990 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:38:14,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-05-12 12:38:14,991 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-05-12 12:38:14,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:38:14,991 INFO L85 PathProgramCache]: Analyzing trace with hash -1466825160, now seen corresponding path program 1 times [2024-05-12 12:38:14,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:38:14,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869734378] [2024-05-12 12:38:14,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:38:14,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:38:14,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:38:15,068 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 12:38:15,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:38:15,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869734378] [2024-05-12 12:38:15,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869734378] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:38:15,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:38:15,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 12:38:15,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051219598] [2024-05-12 12:38:15,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:38:15,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 12:38:15,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:38:15,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 12:38:15,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-05-12 12:38:15,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 63 [2024-05-12 12:38:15,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 172 transitions, 2775 flow. Second operand has 5 states, 5 states have (on average 30.6) internal successors, (153), 5 states have internal predecessors, (153), 0 states have call successors, (0), 0 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 12:38:15,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:38:15,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 63 [2024-05-12 12:38:15,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:38:15,430 INFO L124 PetriNetUnfolderBase]: 1199/2637 cut-off events. [2024-05-12 12:38:15,430 INFO L125 PetriNetUnfolderBase]: For 62823/63051 co-relation queries the response was YES. [2024-05-12 12:38:15,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14474 conditions, 2637 events. 1199/2637 cut-off events. For 62823/63051 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 17581 event pairs, 172 based on Foata normal form. 45/2579 useless extension candidates. Maximal degree in co-relation 14328. Up to 1339 conditions per place. [2024-05-12 12:38:15,448 INFO L140 encePairwiseOnDemand]: 53/63 looper letters, 117 selfloop transitions, 39 changer transitions 0/189 dead transitions. [2024-05-12 12:38:15,448 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 189 transitions, 3337 flow [2024-05-12 12:38:15,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 12:38:15,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 12:38:15,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 200 transitions. [2024-05-12 12:38:15,449 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6349206349206349 [2024-05-12 12:38:15,449 INFO L175 Difference]: Start difference. First operand has 214 places, 172 transitions, 2775 flow. Second operand 5 states and 200 transitions. [2024-05-12 12:38:15,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 189 transitions, 3337 flow [2024-05-12 12:38:15,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 189 transitions, 3148 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-05-12 12:38:15,572 INFO L231 Difference]: Finished difference. Result has 212 places, 174 transitions, 2714 flow [2024-05-12 12:38:15,572 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=2589, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2714, PETRI_PLACES=212, PETRI_TRANSITIONS=174} [2024-05-12 12:38:15,573 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 154 predicate places. [2024-05-12 12:38:15,573 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 174 transitions, 2714 flow [2024-05-12 12:38:15,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.6) internal successors, (153), 5 states have internal predecessors, (153), 0 states have call successors, (0), 0 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 12:38:15,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:38:15,573 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:38:15,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-05-12 12:38:15,573 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-05-12 12:38:15,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:38:15,574 INFO L85 PathProgramCache]: Analyzing trace with hash 956089026, now seen corresponding path program 2 times [2024-05-12 12:38:15,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:38:15,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790035737] [2024-05-12 12:38:15,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:38:15,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:38:15,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:38:15,640 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 12:38:15,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:38:15,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790035737] [2024-05-12 12:38:15,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790035737] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:38:15,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:38:15,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 12:38:15,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138779054] [2024-05-12 12:38:15,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:38:15,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 12:38:15,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:38:15,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 12:38:15,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-05-12 12:38:15,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 63 [2024-05-12 12:38:15,685 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 174 transitions, 2714 flow. Second operand has 5 states, 5 states have (on average 30.6) internal successors, (153), 5 states have internal predecessors, (153), 0 states have call successors, (0), 0 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 12:38:15,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:38:15,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 63 [2024-05-12 12:38:15,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:38:15,974 INFO L124 PetriNetUnfolderBase]: 1197/2645 cut-off events. [2024-05-12 12:38:15,975 INFO L125 PetriNetUnfolderBase]: For 56676/56906 co-relation queries the response was YES. [2024-05-12 12:38:15,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13951 conditions, 2645 events. 1197/2645 cut-off events. For 56676/56906 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 17650 event pairs, 173 based on Foata normal form. 45/2586 useless extension candidates. Maximal degree in co-relation 13800. Up to 1339 conditions per place. [2024-05-12 12:38:15,991 INFO L140 encePairwiseOnDemand]: 53/63 looper letters, 122 selfloop transitions, 34 changer transitions 0/189 dead transitions. [2024-05-12 12:38:15,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 189 transitions, 3242 flow [2024-05-12 12:38:15,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 12:38:15,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 12:38:15,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 199 transitions. [2024-05-12 12:38:15,992 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6317460317460317 [2024-05-12 12:38:15,992 INFO L175 Difference]: Start difference. First operand has 212 places, 174 transitions, 2714 flow. Second operand 5 states and 199 transitions. [2024-05-12 12:38:15,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 189 transitions, 3242 flow [2024-05-12 12:38:16,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 189 transitions, 3161 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-05-12 12:38:16,094 INFO L231 Difference]: Finished difference. Result has 213 places, 174 transitions, 2713 flow [2024-05-12 12:38:16,094 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=2637, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2713, PETRI_PLACES=213, PETRI_TRANSITIONS=174} [2024-05-12 12:38:16,095 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 155 predicate places. [2024-05-12 12:38:16,095 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 174 transitions, 2713 flow [2024-05-12 12:38:16,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.6) internal successors, (153), 5 states have internal predecessors, (153), 0 states have call successors, (0), 0 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 12:38:16,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:38:16,095 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:38:16,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-05-12 12:38:16,095 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-05-12 12:38:16,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:38:16,096 INFO L85 PathProgramCache]: Analyzing trace with hash 2087776663, now seen corresponding path program 1 times [2024-05-12 12:38:16,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:38:16,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658396763] [2024-05-12 12:38:16,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:38:16,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:38:16,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:38:16,169 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 12:38:16,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:38:16,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658396763] [2024-05-12 12:38:16,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658396763] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:38:16,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:38:16,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:38:16,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138971178] [2024-05-12 12:38:16,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:38:16,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:38:16,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:38:16,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:38:16,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:38:16,221 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 63 [2024-05-12 12:38:16,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 174 transitions, 2713 flow. Second operand has 6 states, 6 states have (on average 30.5) internal successors, (183), 6 states have internal predecessors, (183), 0 states have call successors, (0), 0 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 12:38:16,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:38:16,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 63 [2024-05-12 12:38:16,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:38:16,525 INFO L124 PetriNetUnfolderBase]: 1212/2650 cut-off events. [2024-05-12 12:38:16,525 INFO L125 PetriNetUnfolderBase]: For 58360/58738 co-relation queries the response was YES. [2024-05-12 12:38:16,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14254 conditions, 2650 events. 1212/2650 cut-off events. For 58360/58738 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 17873 event pairs, 353 based on Foata normal form. 95/2599 useless extension candidates. Maximal degree in co-relation 12308. Up to 1226 conditions per place. [2024-05-12 12:38:16,546 INFO L140 encePairwiseOnDemand]: 56/63 looper letters, 125 selfloop transitions, 34 changer transitions 2/194 dead transitions. [2024-05-12 12:38:16,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 194 transitions, 3274 flow [2024-05-12 12:38:16,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:38:16,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:38:16,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 225 transitions. [2024-05-12 12:38:16,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5952380952380952 [2024-05-12 12:38:16,547 INFO L175 Difference]: Start difference. First operand has 213 places, 174 transitions, 2713 flow. Second operand 6 states and 225 transitions. [2024-05-12 12:38:16,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 194 transitions, 3274 flow [2024-05-12 12:38:16,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 194 transitions, 3166 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-05-12 12:38:16,683 INFO L231 Difference]: Finished difference. Result has 215 places, 175 transitions, 2702 flow [2024-05-12 12:38:16,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=2606, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2702, PETRI_PLACES=215, PETRI_TRANSITIONS=175} [2024-05-12 12:38:16,683 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 157 predicate places. [2024-05-12 12:38:16,684 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 175 transitions, 2702 flow [2024-05-12 12:38:16,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 30.5) internal successors, (183), 6 states have internal predecessors, (183), 0 states have call successors, (0), 0 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 12:38:16,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:38:16,684 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:38:16,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-05-12 12:38:16,684 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-05-12 12:38:16,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:38:16,685 INFO L85 PathProgramCache]: Analyzing trace with hash -5289669, now seen corresponding path program 2 times [2024-05-12 12:38:16,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:38:16,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890419840] [2024-05-12 12:38:16,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:38:16,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:38:16,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:38:16,744 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 12:38:16,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:38:16,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890419840] [2024-05-12 12:38:16,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890419840] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:38:16,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:38:16,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:38:16,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727519634] [2024-05-12 12:38:16,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:38:16,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:38:16,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:38:16,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:38:16,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:38:16,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 63 [2024-05-12 12:38:16,798 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 175 transitions, 2702 flow. Second operand has 6 states, 6 states have (on average 30.5) internal successors, (183), 6 states have internal predecessors, (183), 0 states have call successors, (0), 0 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 12:38:16,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:38:16,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 63 [2024-05-12 12:38:16,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:38:17,078 INFO L124 PetriNetUnfolderBase]: 1208/2646 cut-off events. [2024-05-12 12:38:17,079 INFO L125 PetriNetUnfolderBase]: For 53357/53741 co-relation queries the response was YES. [2024-05-12 12:38:17,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13953 conditions, 2646 events. 1208/2646 cut-off events. For 53357/53741 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 17862 event pairs, 351 based on Foata normal form. 75/2575 useless extension candidates. Maximal degree in co-relation 12023. Up to 1226 conditions per place. [2024-05-12 12:38:17,139 INFO L140 encePairwiseOnDemand]: 56/63 looper letters, 126 selfloop transitions, 29 changer transitions 6/194 dead transitions. [2024-05-12 12:38:17,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 194 transitions, 3246 flow [2024-05-12 12:38:17,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:38:17,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:38:17,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 225 transitions. [2024-05-12 12:38:17,140 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5952380952380952 [2024-05-12 12:38:17,140 INFO L175 Difference]: Start difference. First operand has 215 places, 175 transitions, 2702 flow. Second operand 6 states and 225 transitions. [2024-05-12 12:38:17,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 194 transitions, 3246 flow [2024-05-12 12:38:17,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 194 transitions, 3182 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-05-12 12:38:17,236 INFO L231 Difference]: Finished difference. Result has 217 places, 173 transitions, 2666 flow [2024-05-12 12:38:17,236 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=2638, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2666, PETRI_PLACES=217, PETRI_TRANSITIONS=173} [2024-05-12 12:38:17,237 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 159 predicate places. [2024-05-12 12:38:17,237 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 173 transitions, 2666 flow [2024-05-12 12:38:17,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 30.5) internal successors, (183), 6 states have internal predecessors, (183), 0 states have call successors, (0), 0 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 12:38:17,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:38:17,237 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:38:17,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-05-12 12:38:17,238 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-05-12 12:38:17,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:38:17,238 INFO L85 PathProgramCache]: Analyzing trace with hash 2041037425, now seen corresponding path program 3 times [2024-05-12 12:38:17,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:38:17,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240762867] [2024-05-12 12:38:17,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:38:17,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:38:17,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:38:17,295 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 12:38:17,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:38:17,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240762867] [2024-05-12 12:38:17,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240762867] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:38:17,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:38:17,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:38:17,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936774867] [2024-05-12 12:38:17,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:38:17,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:38:17,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:38:17,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:38:17,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:38:17,346 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 63 [2024-05-12 12:38:17,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 173 transitions, 2666 flow. Second operand has 6 states, 6 states have (on average 30.5) internal successors, (183), 6 states have internal predecessors, (183), 0 states have call successors, (0), 0 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 12:38:17,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:38:17,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 63 [2024-05-12 12:38:17,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:38:17,615 INFO L124 PetriNetUnfolderBase]: 1199/2631 cut-off events. [2024-05-12 12:38:17,615 INFO L125 PetriNetUnfolderBase]: For 49791/50171 co-relation queries the response was YES. [2024-05-12 12:38:17,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13690 conditions, 2631 events. 1199/2631 cut-off events. For 49791/50171 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 17664 event pairs, 357 based on Foata normal form. 47/2532 useless extension candidates. Maximal degree in co-relation 11767. Up to 1226 conditions per place. [2024-05-12 12:38:17,632 INFO L140 encePairwiseOnDemand]: 56/63 looper letters, 123 selfloop transitions, 26 changer transitions 8/190 dead transitions. [2024-05-12 12:38:17,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 190 transitions, 3108 flow [2024-05-12 12:38:17,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:38:17,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:38:17,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 223 transitions. [2024-05-12 12:38:17,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.58994708994709 [2024-05-12 12:38:17,633 INFO L175 Difference]: Start difference. First operand has 217 places, 173 transitions, 2666 flow. Second operand 6 states and 223 transitions. [2024-05-12 12:38:17,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 190 transitions, 3108 flow [2024-05-12 12:38:17,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 190 transitions, 3024 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-05-12 12:38:17,728 INFO L231 Difference]: Finished difference. Result has 218 places, 171 transitions, 2603 flow [2024-05-12 12:38:17,729 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=2582, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2603, PETRI_PLACES=218, PETRI_TRANSITIONS=171} [2024-05-12 12:38:17,729 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 160 predicate places. [2024-05-12 12:38:17,729 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 171 transitions, 2603 flow [2024-05-12 12:38:17,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 30.5) internal successors, (183), 6 states have internal predecessors, (183), 0 states have call successors, (0), 0 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 12:38:17,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:38:17,730 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:38:17,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-05-12 12:38:17,730 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-05-12 12:38:17,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:38:17,730 INFO L85 PathProgramCache]: Analyzing trace with hash -999726802, now seen corresponding path program 1 times [2024-05-12 12:38:17,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:38:17,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634805504] [2024-05-12 12:38:17,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:38:17,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:38:17,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:38:17,752 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 12:38:17,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:38:17,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634805504] [2024-05-12 12:38:17,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634805504] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:38:17,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:38:17,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 12:38:17,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879699900] [2024-05-12 12:38:17,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:38:17,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-05-12 12:38:17,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:38:17,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-05-12 12:38:17,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-05-12 12:38:17,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 63 [2024-05-12 12:38:17,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 171 transitions, 2603 flow. Second operand has 4 states, 4 states have (on average 37.75) internal successors, (151), 4 states have internal predecessors, (151), 0 states have call successors, (0), 0 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 12:38:17,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:38:17,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 63 [2024-05-12 12:38:17,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:38:17,958 INFO L124 PetriNetUnfolderBase]: 601/1423 cut-off events. [2024-05-12 12:38:17,958 INFO L125 PetriNetUnfolderBase]: For 14715/14808 co-relation queries the response was YES. [2024-05-12 12:38:17,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6209 conditions, 1423 events. 601/1423 cut-off events. For 14715/14808 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 9416 event pairs, 118 based on Foata normal form. 74/1408 useless extension candidates. Maximal degree in co-relation 6110. Up to 621 conditions per place. [2024-05-12 12:38:17,967 INFO L140 encePairwiseOnDemand]: 55/63 looper letters, 31 selfloop transitions, 9 changer transitions 35/151 dead transitions. [2024-05-12 12:38:17,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 151 transitions, 2191 flow [2024-05-12 12:38:17,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 12:38:17,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 12:38:17,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 219 transitions. [2024-05-12 12:38:17,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6952380952380952 [2024-05-12 12:38:17,969 INFO L175 Difference]: Start difference. First operand has 218 places, 171 transitions, 2603 flow. Second operand 5 states and 219 transitions. [2024-05-12 12:38:17,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 151 transitions, 2191 flow [2024-05-12 12:38:18,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 151 transitions, 1789 flow, removed 7 selfloop flow, removed 26 redundant places. [2024-05-12 12:38:18,012 INFO L231 Difference]: Finished difference. Result has 193 places, 109 transitions, 1240 flow [2024-05-12 12:38:18,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=1630, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1240, PETRI_PLACES=193, PETRI_TRANSITIONS=109} [2024-05-12 12:38:18,014 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 135 predicate places. [2024-05-12 12:38:18,014 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 109 transitions, 1240 flow [2024-05-12 12:38:18,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.75) internal successors, (151), 4 states have internal predecessors, (151), 0 states have call successors, (0), 0 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 12:38:18,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:38:18,014 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:38:18,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-05-12 12:38:18,015 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-05-12 12:38:18,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:38:18,015 INFO L85 PathProgramCache]: Analyzing trace with hash 1497752553, now seen corresponding path program 1 times [2024-05-12 12:38:18,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:38:18,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003591542] [2024-05-12 12:38:18,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:38:18,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:38:18,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:38:18,070 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 12:38:18,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:38:18,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003591542] [2024-05-12 12:38:18,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003591542] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:38:18,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:38:18,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 12:38:18,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327327438] [2024-05-12 12:38:18,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:38:18,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 12:38:18,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:38:18,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 12:38:18,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-05-12 12:38:18,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 63 [2024-05-12 12:38:18,110 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 109 transitions, 1240 flow. Second operand has 5 states, 5 states have (on average 31.0) internal successors, (155), 5 states have internal predecessors, (155), 0 states have call successors, (0), 0 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 12:38:18,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:38:18,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 63 [2024-05-12 12:38:18,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:38:18,222 INFO L124 PetriNetUnfolderBase]: 444/1058 cut-off events. [2024-05-12 12:38:18,223 INFO L125 PetriNetUnfolderBase]: For 9257/9351 co-relation queries the response was YES. [2024-05-12 12:38:18,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4174 conditions, 1058 events. 444/1058 cut-off events. For 9257/9351 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 5842 event pairs, 83 based on Foata normal form. 18/1030 useless extension candidates. Maximal degree in co-relation 4109. Up to 557 conditions per place. [2024-05-12 12:38:18,228 INFO L140 encePairwiseOnDemand]: 55/63 looper letters, 0 selfloop transitions, 0 changer transitions 119/119 dead transitions. [2024-05-12 12:38:18,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 119 transitions, 1350 flow [2024-05-12 12:38:18,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 12:38:18,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 12:38:18,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 185 transitions. [2024-05-12 12:38:18,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5873015873015873 [2024-05-12 12:38:18,229 INFO L175 Difference]: Start difference. First operand has 193 places, 109 transitions, 1240 flow. Second operand 5 states and 185 transitions. [2024-05-12 12:38:18,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 119 transitions, 1350 flow [2024-05-12 12:38:18,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 119 transitions, 975 flow, removed 4 selfloop flow, removed 52 redundant places. [2024-05-12 12:38:18,239 INFO L231 Difference]: Finished difference. Result has 130 places, 0 transitions, 0 flow [2024-05-12 12:38:18,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=773, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=130, PETRI_TRANSITIONS=0} [2024-05-12 12:38:18,239 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 72 predicate places. [2024-05-12 12:38:18,240 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 0 transitions, 0 flow [2024-05-12 12:38:18,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.0) internal successors, (155), 5 states have internal predecessors, (155), 0 states have call successors, (0), 0 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 12:38:18,242 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr2Err0ASSERT_VIOLATIONERROR_FUNCTION (7 of 8 remaining) [2024-05-12 12:38:18,242 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (6 of 8 remaining) [2024-05-12 12:38:18,242 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (5 of 8 remaining) [2024-05-12 12:38:18,243 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 8 remaining) [2024-05-12 12:38:18,243 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 8 remaining) [2024-05-12 12:38:18,243 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 8 remaining) [2024-05-12 12:38:18,243 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr2Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 8 remaining) [2024-05-12 12:38:18,243 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 8 remaining) [2024-05-12 12:38:18,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-05-12 12:38:18,243 INFO L445 BasicCegarLoop]: Path program histogram: [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:38:18,247 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-05-12 12:38:18,247 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-05-12 12:38:18,250 INFO L507 ceAbstractionStarter]: Automizer considered 2 witness invariants [2024-05-12 12:38:18,250 INFO L508 ceAbstractionStarter]: WitnessConsidered=2 [2024-05-12 12:38:18,251 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.05 12:38:18 BasicIcfg [2024-05-12 12:38:18,251 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-05-12 12:38:18,251 INFO L158 Benchmark]: Toolchain (without parser) took 30123.75ms. Allocated memory was 157.3MB in the beginning and 1.1GB in the end (delta: 945.8MB). Free memory was 83.8MB in the beginning and 519.3MB in the end (delta: -435.5MB). Peak memory consumption was 511.1MB. Max. memory is 16.1GB. [2024-05-12 12:38:18,255 INFO L158 Benchmark]: Witness Parser took 0.15ms. Allocated memory is still 117.4MB. Free memory is still 79.6MB. There was no memory consumed. Max. memory is 16.1GB. [2024-05-12 12:38:18,255 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 157.3MB. Free memory is still 131.5MB. There was no memory consumed. Max. memory is 16.1GB. [2024-05-12 12:38:18,255 INFO L158 Benchmark]: CACSL2BoogieTranslator took 588.23ms. Allocated memory is still 157.3MB. Free memory was 83.5MB in the beginning and 126.0MB in the end (delta: -42.5MB). Peak memory consumption was 33.5MB. Max. memory is 16.1GB. [2024-05-12 12:38:18,255 INFO L158 Benchmark]: Boogie Procedure Inliner took 28.96ms. Allocated memory is still 157.3MB. Free memory was 126.0MB in the beginning and 123.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-05-12 12:38:18,255 INFO L158 Benchmark]: Boogie Preprocessor took 34.80ms. Allocated memory is still 157.3MB. Free memory was 123.9MB in the beginning and 121.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-05-12 12:38:18,256 INFO L158 Benchmark]: RCFGBuilder took 406.26ms. Allocated memory is still 157.3MB. Free memory was 121.8MB in the beginning and 95.1MB in the end (delta: 26.7MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2024-05-12 12:38:18,256 INFO L158 Benchmark]: TraceAbstraction took 29061.21ms. Allocated memory was 157.3MB in the beginning and 1.1GB in the end (delta: 945.8MB). Free memory was 94.6MB in the beginning and 519.3MB in the end (delta: -424.7MB). Peak memory consumption was 519.6MB. Max. memory is 16.1GB. [2024-05-12 12:38:18,257 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Witness Parser took 0.15ms. Allocated memory is still 117.4MB. Free memory is still 79.6MB. There was no memory consumed. Max. memory is 16.1GB. * CDTParser took 0.13ms. Allocated memory is still 157.3MB. Free memory is still 131.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 588.23ms. Allocated memory is still 157.3MB. Free memory was 83.5MB in the beginning and 126.0MB in the end (delta: -42.5MB). Peak memory consumption was 33.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 28.96ms. Allocated memory is still 157.3MB. Free memory was 126.0MB in the beginning and 123.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 34.80ms. Allocated memory is still 157.3MB. Free memory was 123.9MB in the beginning and 121.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 406.26ms. Allocated memory is still 157.3MB. Free memory was 121.8MB in the beginning and 95.1MB in the end (delta: 26.7MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * TraceAbstraction took 29061.21ms. Allocated memory was 157.3MB in the beginning and 1.1GB in the end (delta: 945.8MB). Free memory was 94.6MB in the beginning and 519.3MB in the end (delta: -424.7MB). Peak memory consumption was 519.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 780]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - PositiveResult [Line: 739]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - PositiveResult [Line: 793]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 794]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 98 locations, 8 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 29.0s, OverallIterations: 56, TraceHistogramMax: 1, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 24.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 5972 SdHoareTripleChecker+Valid, 5.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 4234 mSDsluCounter, 2447 SdHoareTripleChecker+Invalid, 4.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1769 mSDsCounter, 600 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 9073 IncrementalHoareTripleChecker+Invalid, 9673 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 600 mSolverCounterUnsat, 678 mSDtfsCounter, 9073 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 245 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=3139occurred in iteration=42, InterpolantAutomatonStates: 315, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 3.9s InterpolantComputationTime, 1025 NumberOfCodeBlocks, 1025 NumberOfCodeBlocksAsserted, 56 NumberOfCheckSat, 969 ConstructedInterpolants, 0 QuantifiedInterpolants, 4384 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 56 InterpolantComputations, 56 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 4 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-05-12 12:38:18,288 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE