./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe022_tso.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-06-19_11-23-25.files/protection/safe022_tso.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe022_tso.i ./goblint.2024-06-19_11-23-25.files/protection/safe022_tso.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 17:54:35,471 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 17:54:35,523 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 17:54:35,528 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 17:54:35,528 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 17:54:35,548 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 17:54:35,549 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 17:54:35,550 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 17:54:35,550 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 17:54:35,553 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 17:54:35,553 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 17:54:35,554 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 17:54:35,554 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 17:54:35,555 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 17:54:35,555 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 17:54:35,555 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 17:54:35,556 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 17:54:35,556 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 17:54:35,556 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 17:54:35,556 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 17:54:35,556 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 17:54:35,557 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 17:54:35,557 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 17:54:35,557 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 17:54:35,557 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 17:54:35,557 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 17:54:35,558 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 17:54:35,558 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 17:54:35,558 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 17:54:35,559 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 17:54:35,559 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 17:54:35,560 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 17:54:35,560 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 17:54:35,560 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 17:54:35,560 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 17:54:35,560 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 17:54:35,560 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 17:54:35,561 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 17:54:35,561 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 17:54:35,561 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 17:54:35,561 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 17:54:35,561 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 17:54:35,561 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 17:54:35,562 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-06-27 17:54:35,729 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 17:54:35,752 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 17:54:35,755 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 17:54:35,755 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 17:54:35,756 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 17:54:35,757 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/safe022_tso.yml/witness.yml [2024-06-27 17:54:35,892 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 17:54:35,892 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 17:54:35,892 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe022_tso.i [2024-06-27 17:54:36,861 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 17:54:37,085 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 17:54:37,085 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe022_tso.i [2024-06-27 17:54:37,102 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0639fb039/9a9e7c3c3c024cd4bb66b9f54c7b02a0/FLAG4678f33cb [2024-06-27 17:54:37,115 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0639fb039/9a9e7c3c3c024cd4bb66b9f54c7b02a0 [2024-06-27 17:54:37,116 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 17:54:37,117 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 17:54:37,120 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 17:54:37,120 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 17:54:37,124 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 17:54:37,125 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 05:54:35" (1/2) ... [2024-06-27 17:54:37,125 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@370534d2 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:54:37, skipping insertion in model container [2024-06-27 17:54:37,125 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 05:54:35" (1/2) ... [2024-06-27 17:54:37,127 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3e01fa2c and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:54:37, skipping insertion in model container [2024-06-27 17:54:37,127 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 05:54:37" (2/2) ... [2024-06-27 17:54:37,129 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@370534d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:54:37, skipping insertion in model container [2024-06-27 17:54:37,129 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 05:54:37" (2/2) ... [2024-06-27 17:54:37,129 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 17:54:37,157 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 17:54:37,158 INFO L97 edCorrectnessWitness]: Location invariant before [L763-L763] ((((! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (x == 0 || x == 1)) [2024-06-27 17:54:37,159 INFO L97 edCorrectnessWitness]: Location invariant before [L764-L764] ((((! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (x == 0 || x == 1)) [2024-06-27 17:54:37,159 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 17:54:37,159 INFO L106 edCorrectnessWitness]: ghost_update [L761-L761] multithreaded = 1; [2024-06-27 17:54:37,195 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 17:54:37,344 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe022_tso.i[945,958] [2024-06-27 17:54:37,451 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 17:54:37,458 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local [2024-06-27 17:54:37,488 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe022_tso.i[945,958] Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 17:54:37,536 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 17:54:37,568 INFO L206 MainTranslator]: Completed translation [2024-06-27 17:54:37,569 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:54:37 WrapperNode [2024-06-27 17:54:37,569 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 17:54:37,570 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 17:54:37,570 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 17:54:37,570 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 17:54:37,576 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:54:37" (1/1) ... [2024-06-27 17:54:37,604 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:54:37" (1/1) ... [2024-06-27 17:54:37,621 INFO L138 Inliner]: procedures = 174, calls = 32, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 55 [2024-06-27 17:54:37,623 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 17:54:37,624 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 17:54:37,624 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 17:54:37,624 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 17:54:37,632 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:54:37" (1/1) ... [2024-06-27 17:54:37,632 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:54:37" (1/1) ... [2024-06-27 17:54:37,634 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:54:37" (1/1) ... [2024-06-27 17:54:37,643 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-27 17:54:37,644 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:54:37" (1/1) ... [2024-06-27 17:54:37,644 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:54:37" (1/1) ... [2024-06-27 17:54:37,649 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:54:37" (1/1) ... [2024-06-27 17:54:37,650 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:54:37" (1/1) ... [2024-06-27 17:54:37,651 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:54:37" (1/1) ... [2024-06-27 17:54:37,652 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:54:37" (1/1) ... [2024-06-27 17:54:37,654 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 17:54:37,655 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 17:54:37,655 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 17:54:37,655 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 17:54:37,656 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:54:37" (1/1) ... [2024-06-27 17:54:37,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 17:54:37,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:54:37,680 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-27 17:54:37,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-27 17:54:37,735 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 17:54:37,735 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 17:54:37,735 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 17:54:37,735 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 17:54:37,735 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 17:54:37,735 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 17:54:37,736 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 17:54:37,736 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 17:54:37,736 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 17:54:37,736 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 17:54:37,737 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 17:54:37,821 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 17:54:37,823 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 17:54:37,928 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 17:54:37,929 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 17:54:37,977 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 17:54:37,977 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 17:54:37,977 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 05:54:37 BoogieIcfgContainer [2024-06-27 17:54:37,977 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 17:54:37,979 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 17:54:37,979 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 17:54:37,981 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 17:54:37,981 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 05:54:35" (1/4) ... [2024-06-27 17:54:37,982 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@351f59b6 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 05:54:37, skipping insertion in model container [2024-06-27 17:54:37,982 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 05:54:37" (2/4) ... [2024-06-27 17:54:37,982 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@351f59b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 05:54:37, skipping insertion in model container [2024-06-27 17:54:37,982 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:54:37" (3/4) ... [2024-06-27 17:54:37,983 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@351f59b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 05:54:37, skipping insertion in model container [2024-06-27 17:54:37,983 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 05:54:37" (4/4) ... [2024-06-27 17:54:37,983 INFO L112 eAbstractionObserver]: Analyzing ICFG safe022_tso.i [2024-06-27 17:54:37,995 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 17:54:37,995 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-27 17:54:37,996 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 17:54:38,020 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 17:54:38,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 40 places, 34 transitions, 76 flow [2024-06-27 17:54:38,061 INFO L124 PetriNetUnfolderBase]: 1/32 cut-off events. [2024-06-27 17:54:38,061 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 17:54:38,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39 conditions, 32 events. 1/32 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 43 event pairs, 0 based on Foata normal form. 0/28 useless extension candidates. Maximal degree in co-relation 31. Up to 2 conditions per place. [2024-06-27 17:54:38,064 INFO L82 GeneralOperation]: Start removeDead. Operand has 40 places, 34 transitions, 76 flow [2024-06-27 17:54:38,066 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 36 places, 29 transitions, 64 flow [2024-06-27 17:54:38,072 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 17:54:38,077 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;@71246669, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 17:54:38,077 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-06-27 17:54:38,080 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 17:54:38,080 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-27 17:54:38,081 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 17:54:38,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:54:38,081 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 17:54:38,081 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:54:38,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:54:38,085 INFO L85 PathProgramCache]: Analyzing trace with hash 178529934, now seen corresponding path program 1 times [2024-06-27 17:54:38,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:54:38,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064062907] [2024-06-27 17:54:38,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:54:38,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:54:38,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:54:38,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:54:38,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:54:38,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064062907] [2024-06-27 17:54:38,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064062907] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:54:38,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:54:38,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 17:54:38,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152496086] [2024-06-27 17:54:38,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:54:38,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 17:54:38,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:54:38,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 17:54:38,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 17:54:38,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 34 [2024-06-27 17:54:38,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 29 transitions, 64 flow. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:38,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:54:38,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 34 [2024-06-27 17:54:38,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:54:38,636 INFO L124 PetriNetUnfolderBase]: 109/228 cut-off events. [2024-06-27 17:54:38,639 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-06-27 17:54:38,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 447 conditions, 228 events. 109/228 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 964 event pairs, 57 based on Foata normal form. 1/219 useless extension candidates. Maximal degree in co-relation 436. Up to 196 conditions per place. [2024-06-27 17:54:38,644 INFO L140 encePairwiseOnDemand]: 29/34 looper letters, 21 selfloop transitions, 3 changer transitions 0/37 dead transitions. [2024-06-27 17:54:38,644 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 37 transitions, 131 flow [2024-06-27 17:54:38,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 17:54:38,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 17:54:38,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 74 transitions. [2024-06-27 17:54:38,653 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7254901960784313 [2024-06-27 17:54:38,655 INFO L175 Difference]: Start difference. First operand has 36 places, 29 transitions, 64 flow. Second operand 3 states and 74 transitions. [2024-06-27 17:54:38,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 37 transitions, 131 flow [2024-06-27 17:54:38,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 37 transitions, 128 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-27 17:54:38,659 INFO L231 Difference]: Finished difference. Result has 37 places, 31 transitions, 83 flow [2024-06-27 17:54:38,660 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=83, PETRI_PLACES=37, PETRI_TRANSITIONS=31} [2024-06-27 17:54:38,663 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 1 predicate places. [2024-06-27 17:54:38,663 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 31 transitions, 83 flow [2024-06-27 17:54:38,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:38,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:54:38,664 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:54:38,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 17:54:38,664 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:54:38,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:54:38,666 INFO L85 PathProgramCache]: Analyzing trace with hash -231274075, now seen corresponding path program 1 times [2024-06-27 17:54:38,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:54:38,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909565039] [2024-06-27 17:54:38,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:54:38,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:54:38,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:54:38,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:54:38,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:54:38,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909565039] [2024-06-27 17:54:38,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909565039] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:54:38,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:54:38,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 17:54:38,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331508092] [2024-06-27 17:54:38,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:54:38,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 17:54:38,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:54:38,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 17:54:38,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 17:54:38,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 34 [2024-06-27 17:54:38,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 31 transitions, 83 flow. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:38,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:54:38,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 34 [2024-06-27 17:54:38,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:54:38,844 INFO L124 PetriNetUnfolderBase]: 144/297 cut-off events. [2024-06-27 17:54:38,844 INFO L125 PetriNetUnfolderBase]: For 51/51 co-relation queries the response was YES. [2024-06-27 17:54:38,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 654 conditions, 297 events. 144/297 cut-off events. For 51/51 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1332 event pairs, 46 based on Foata normal form. 2/298 useless extension candidates. Maximal degree in co-relation 642. Up to 240 conditions per place. [2024-06-27 17:54:38,847 INFO L140 encePairwiseOnDemand]: 28/34 looper letters, 30 selfloop transitions, 5 changer transitions 0/47 dead transitions. [2024-06-27 17:54:38,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 47 transitions, 192 flow [2024-06-27 17:54:38,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 17:54:38,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 17:54:38,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 95 transitions. [2024-06-27 17:54:38,848 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6985294117647058 [2024-06-27 17:54:38,848 INFO L175 Difference]: Start difference. First operand has 37 places, 31 transitions, 83 flow. Second operand 4 states and 95 transitions. [2024-06-27 17:54:38,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 47 transitions, 192 flow [2024-06-27 17:54:38,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 47 transitions, 188 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 17:54:38,850 INFO L231 Difference]: Finished difference. Result has 41 places, 35 transitions, 116 flow [2024-06-27 17:54:38,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=116, PETRI_PLACES=41, PETRI_TRANSITIONS=35} [2024-06-27 17:54:38,851 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 5 predicate places. [2024-06-27 17:54:38,852 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 35 transitions, 116 flow [2024-06-27 17:54:38,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:38,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:54:38,852 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:54:38,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 17:54:38,853 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:54:38,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:54:38,857 INFO L85 PathProgramCache]: Analyzing trace with hash 1420439449, now seen corresponding path program 1 times [2024-06-27 17:54:38,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:54:38,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205222733] [2024-06-27 17:54:38,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:54:38,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:54:38,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:54:38,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:54:39,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:54:39,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205222733] [2024-06-27 17:54:39,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205222733] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:54:39,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:54:39,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:54:39,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718034946] [2024-06-27 17:54:39,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:54:39,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:54:39,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:54:39,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:54:39,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:54:39,017 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 34 [2024-06-27 17:54:39,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 35 transitions, 116 flow. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:39,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:54:39,018 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 34 [2024-06-27 17:54:39,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:54:39,118 INFO L124 PetriNetUnfolderBase]: 177/361 cut-off events. [2024-06-27 17:54:39,118 INFO L125 PetriNetUnfolderBase]: For 167/167 co-relation queries the response was YES. [2024-06-27 17:54:39,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 880 conditions, 361 events. 177/361 cut-off events. For 167/167 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1678 event pairs, 45 based on Foata normal form. 2/362 useless extension candidates. Maximal degree in co-relation 865. Up to 281 conditions per place. [2024-06-27 17:54:39,122 INFO L140 encePairwiseOnDemand]: 27/34 looper letters, 41 selfloop transitions, 7 changer transitions 0/59 dead transitions. [2024-06-27 17:54:39,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 59 transitions, 275 flow [2024-06-27 17:54:39,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:54:39,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:54:39,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 114 transitions. [2024-06-27 17:54:39,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6705882352941176 [2024-06-27 17:54:39,128 INFO L175 Difference]: Start difference. First operand has 41 places, 35 transitions, 116 flow. Second operand 5 states and 114 transitions. [2024-06-27 17:54:39,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 59 transitions, 275 flow [2024-06-27 17:54:39,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 59 transitions, 275 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-06-27 17:54:39,132 INFO L231 Difference]: Finished difference. Result has 48 places, 41 transitions, 172 flow [2024-06-27 17:54:39,132 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=172, PETRI_PLACES=48, PETRI_TRANSITIONS=41} [2024-06-27 17:54:39,133 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 12 predicate places. [2024-06-27 17:54:39,133 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 41 transitions, 172 flow [2024-06-27 17:54:39,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:39,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:54:39,134 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:54:39,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 17:54:39,135 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:54:39,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:54:39,135 INFO L85 PathProgramCache]: Analyzing trace with hash 102218384, now seen corresponding path program 1 times [2024-06-27 17:54:39,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:54:39,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973575535] [2024-06-27 17:54:39,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:54:39,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:54:39,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:54:39,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:54:39,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:54:39,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973575535] [2024-06-27 17:54:39,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973575535] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:54:39,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:54:39,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:54:39,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497724875] [2024-06-27 17:54:39,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:54:39,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:54:39,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:54:39,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:54:39,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:54:39,302 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 34 [2024-06-27 17:54:39,302 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 41 transitions, 172 flow. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:39,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:54:39,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 34 [2024-06-27 17:54:39,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:54:39,388 INFO L124 PetriNetUnfolderBase]: 173/362 cut-off events. [2024-06-27 17:54:39,388 INFO L125 PetriNetUnfolderBase]: For 322/322 co-relation queries the response was YES. [2024-06-27 17:54:39,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 989 conditions, 362 events. 173/362 cut-off events. For 322/322 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1685 event pairs, 42 based on Foata normal form. 4/361 useless extension candidates. Maximal degree in co-relation 969. Up to 247 conditions per place. [2024-06-27 17:54:39,391 INFO L140 encePairwiseOnDemand]: 27/34 looper letters, 43 selfloop transitions, 8 changer transitions 0/62 dead transitions. [2024-06-27 17:54:39,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 62 transitions, 316 flow [2024-06-27 17:54:39,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:54:39,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:54:39,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 131 transitions. [2024-06-27 17:54:39,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6421568627450981 [2024-06-27 17:54:39,393 INFO L175 Difference]: Start difference. First operand has 48 places, 41 transitions, 172 flow. Second operand 6 states and 131 transitions. [2024-06-27 17:54:39,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 62 transitions, 316 flow [2024-06-27 17:54:39,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 62 transitions, 316 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-06-27 17:54:39,397 INFO L231 Difference]: Finished difference. Result has 53 places, 40 transitions, 184 flow [2024-06-27 17:54:39,397 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=184, PETRI_PLACES=53, PETRI_TRANSITIONS=40} [2024-06-27 17:54:39,398 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 17 predicate places. [2024-06-27 17:54:39,398 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 40 transitions, 184 flow [2024-06-27 17:54:39,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:39,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:54:39,399 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:54:39,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 17:54:39,399 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:54:39,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:54:39,400 INFO L85 PathProgramCache]: Analyzing trace with hash 433863130, now seen corresponding path program 1 times [2024-06-27 17:54:39,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:54:39,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82705568] [2024-06-27 17:54:39,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:54:39,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:54:39,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:54:39,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:54:39,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:54:39,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82705568] [2024-06-27 17:54:39,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82705568] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:54:39,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:54:39,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:54:39,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187846772] [2024-06-27 17:54:39,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:54:39,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:54:39,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:54:39,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:54:39,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:54:39,516 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 34 [2024-06-27 17:54:39,517 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 40 transitions, 184 flow. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:39,517 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:54:39,517 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 34 [2024-06-27 17:54:39,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:54:39,578 INFO L124 PetriNetUnfolderBase]: 180/365 cut-off events. [2024-06-27 17:54:39,579 INFO L125 PetriNetUnfolderBase]: For 453/453 co-relation queries the response was YES. [2024-06-27 17:54:39,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1080 conditions, 365 events. 180/365 cut-off events. For 453/453 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1717 event pairs, 34 based on Foata normal form. 1/366 useless extension candidates. Maximal degree in co-relation 1057. Up to 251 conditions per place. [2024-06-27 17:54:39,596 INFO L140 encePairwiseOnDemand]: 27/34 looper letters, 42 selfloop transitions, 13 changer transitions 0/66 dead transitions. [2024-06-27 17:54:39,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 66 transitions, 368 flow [2024-06-27 17:54:39,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:54:39,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:54:39,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 135 transitions. [2024-06-27 17:54:39,598 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6617647058823529 [2024-06-27 17:54:39,598 INFO L175 Difference]: Start difference. First operand has 53 places, 40 transitions, 184 flow. Second operand 6 states and 135 transitions. [2024-06-27 17:54:39,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 66 transitions, 368 flow [2024-06-27 17:54:39,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 66 transitions, 347 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-27 17:54:39,600 INFO L231 Difference]: Finished difference. Result has 54 places, 44 transitions, 214 flow [2024-06-27 17:54:39,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=163, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=214, PETRI_PLACES=54, PETRI_TRANSITIONS=44} [2024-06-27 17:54:39,601 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 18 predicate places. [2024-06-27 17:54:39,601 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 44 transitions, 214 flow [2024-06-27 17:54:39,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:39,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:54:39,601 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:54:39,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 17:54:39,602 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:54:39,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:54:39,602 INFO L85 PathProgramCache]: Analyzing trace with hash 1774569478, now seen corresponding path program 1 times [2024-06-27 17:54:39,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:54:39,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811591876] [2024-06-27 17:54:39,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:54:39,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:54:39,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:54:39,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:54:39,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:54:39,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811591876] [2024-06-27 17:54:39,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811591876] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:54:39,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:54:39,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:54:39,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143911873] [2024-06-27 17:54:39,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:54:39,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:54:39,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:54:39,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:54:39,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:54:39,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 34 [2024-06-27 17:54:39,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 44 transitions, 214 flow. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:39,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:54:39,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 34 [2024-06-27 17:54:39,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:54:39,759 INFO L124 PetriNetUnfolderBase]: 194/391 cut-off events. [2024-06-27 17:54:39,759 INFO L125 PetriNetUnfolderBase]: For 600/600 co-relation queries the response was YES. [2024-06-27 17:54:39,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1212 conditions, 391 events. 194/391 cut-off events. For 600/600 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1900 event pairs, 36 based on Foata normal form. 1/390 useless extension candidates. Maximal degree in co-relation 1189. Up to 272 conditions per place. [2024-06-27 17:54:39,761 INFO L140 encePairwiseOnDemand]: 27/34 looper letters, 44 selfloop transitions, 14 changer transitions 0/69 dead transitions. [2024-06-27 17:54:39,761 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 69 transitions, 414 flow [2024-06-27 17:54:39,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:54:39,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:54:39,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 133 transitions. [2024-06-27 17:54:39,762 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6519607843137255 [2024-06-27 17:54:39,763 INFO L175 Difference]: Start difference. First operand has 54 places, 44 transitions, 214 flow. Second operand 6 states and 133 transitions. [2024-06-27 17:54:39,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 69 transitions, 414 flow [2024-06-27 17:54:39,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 69 transitions, 388 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-27 17:54:39,765 INFO L231 Difference]: Finished difference. Result has 58 places, 50 transitions, 262 flow [2024-06-27 17:54:39,765 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=262, PETRI_PLACES=58, PETRI_TRANSITIONS=50} [2024-06-27 17:54:39,766 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 22 predicate places. [2024-06-27 17:54:39,766 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 50 transitions, 262 flow [2024-06-27 17:54:39,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:39,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:54:39,767 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:54:39,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 17:54:39,767 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:54:39,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:54:39,767 INFO L85 PathProgramCache]: Analyzing trace with hash 1774569292, now seen corresponding path program 2 times [2024-06-27 17:54:39,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:54:39,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039565460] [2024-06-27 17:54:39,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:54:39,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:54:39,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:54:39,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:54:39,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:54:39,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039565460] [2024-06-27 17:54:39,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039565460] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:54:39,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:54:39,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:54:39,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329666109] [2024-06-27 17:54:39,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:54:39,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:54:39,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:54:39,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:54:39,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:54:39,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 34 [2024-06-27 17:54:39,883 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 50 transitions, 262 flow. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:39,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:54:39,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 34 [2024-06-27 17:54:39,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:54:39,965 INFO L124 PetriNetUnfolderBase]: 201/402 cut-off events. [2024-06-27 17:54:39,965 INFO L125 PetriNetUnfolderBase]: For 744/744 co-relation queries the response was YES. [2024-06-27 17:54:39,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1309 conditions, 402 events. 201/402 cut-off events. For 744/744 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1942 event pairs, 33 based on Foata normal form. 1/403 useless extension candidates. Maximal degree in co-relation 1284. Up to 302 conditions per place. [2024-06-27 17:54:39,968 INFO L140 encePairwiseOnDemand]: 27/34 looper letters, 47 selfloop transitions, 12 changer transitions 0/70 dead transitions. [2024-06-27 17:54:39,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 70 transitions, 430 flow [2024-06-27 17:54:39,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:54:39,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:54:39,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 130 transitions. [2024-06-27 17:54:39,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6372549019607843 [2024-06-27 17:54:39,969 INFO L175 Difference]: Start difference. First operand has 58 places, 50 transitions, 262 flow. Second operand 6 states and 130 transitions. [2024-06-27 17:54:39,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 70 transitions, 430 flow [2024-06-27 17:54:39,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 70 transitions, 419 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-06-27 17:54:39,973 INFO L231 Difference]: Finished difference. Result has 63 places, 52 transitions, 294 flow [2024-06-27 17:54:39,973 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=251, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=294, PETRI_PLACES=63, PETRI_TRANSITIONS=52} [2024-06-27 17:54:39,976 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 27 predicate places. [2024-06-27 17:54:39,976 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 52 transitions, 294 flow [2024-06-27 17:54:39,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:39,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:54:39,976 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:54:39,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 17:54:39,977 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:54:39,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:54:39,977 INFO L85 PathProgramCache]: Analyzing trace with hash -1763589502, now seen corresponding path program 2 times [2024-06-27 17:54:39,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:54:39,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968448340] [2024-06-27 17:54:39,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:54:39,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:54:39,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:54:40,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:54:40,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:54:40,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968448340] [2024-06-27 17:54:40,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968448340] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:54:40,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:54:40,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:54:40,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958857701] [2024-06-27 17:54:40,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:54:40,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:54:40,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:54:40,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:54:40,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:54:40,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 34 [2024-06-27 17:54:40,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 52 transitions, 294 flow. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:40,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:54:40,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 34 [2024-06-27 17:54:40,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:54:40,153 INFO L124 PetriNetUnfolderBase]: 208/417 cut-off events. [2024-06-27 17:54:40,153 INFO L125 PetriNetUnfolderBase]: For 899/899 co-relation queries the response was YES. [2024-06-27 17:54:40,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1426 conditions, 417 events. 208/417 cut-off events. For 899/899 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2006 event pairs, 36 based on Foata normal form. 1/416 useless extension candidates. Maximal degree in co-relation 1399. Up to 306 conditions per place. [2024-06-27 17:54:40,155 INFO L140 encePairwiseOnDemand]: 28/34 looper letters, 43 selfloop transitions, 12 changer transitions 0/66 dead transitions. [2024-06-27 17:54:40,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 66 transitions, 444 flow [2024-06-27 17:54:40,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 17:54:40,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 17:54:40,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 94 transitions. [2024-06-27 17:54:40,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6911764705882353 [2024-06-27 17:54:40,157 INFO L175 Difference]: Start difference. First operand has 63 places, 52 transitions, 294 flow. Second operand 4 states and 94 transitions. [2024-06-27 17:54:40,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 66 transitions, 444 flow [2024-06-27 17:54:40,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 66 transitions, 415 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-27 17:54:40,160 INFO L231 Difference]: Finished difference. Result has 62 places, 54 transitions, 317 flow [2024-06-27 17:54:40,160 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=265, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=317, PETRI_PLACES=62, PETRI_TRANSITIONS=54} [2024-06-27 17:54:40,160 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 26 predicate places. [2024-06-27 17:54:40,160 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 54 transitions, 317 flow [2024-06-27 17:54:40,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:40,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:54:40,161 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:54:40,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 17:54:40,161 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:54:40,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:54:40,162 INFO L85 PathProgramCache]: Analyzing trace with hash -1751314618, now seen corresponding path program 3 times [2024-06-27 17:54:40,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:54:40,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349524786] [2024-06-27 17:54:40,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:54:40,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:54:40,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:54:40,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:54:40,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:54:40,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349524786] [2024-06-27 17:54:40,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349524786] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:54:40,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:54:40,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:54:40,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859587871] [2024-06-27 17:54:40,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:54:40,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:54:40,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:54:40,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:54:40,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:54:40,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 34 [2024-06-27 17:54:40,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 54 transitions, 317 flow. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:40,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:54:40,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 34 [2024-06-27 17:54:40,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:54:40,333 INFO L124 PetriNetUnfolderBase]: 206/425 cut-off events. [2024-06-27 17:54:40,334 INFO L125 PetriNetUnfolderBase]: For 1151/1151 co-relation queries the response was YES. [2024-06-27 17:54:40,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1464 conditions, 425 events. 206/425 cut-off events. For 1151/1151 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2114 event pairs, 35 based on Foata normal form. 1/425 useless extension candidates. Maximal degree in co-relation 1437. Up to 290 conditions per place. [2024-06-27 17:54:40,336 INFO L140 encePairwiseOnDemand]: 27/34 looper letters, 46 selfloop transitions, 15 changer transitions 0/72 dead transitions. [2024-06-27 17:54:40,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 72 transitions, 481 flow [2024-06-27 17:54:40,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:54:40,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:54:40,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 115 transitions. [2024-06-27 17:54:40,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6764705882352942 [2024-06-27 17:54:40,337 INFO L175 Difference]: Start difference. First operand has 62 places, 54 transitions, 317 flow. Second operand 5 states and 115 transitions. [2024-06-27 17:54:40,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 72 transitions, 481 flow [2024-06-27 17:54:40,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 72 transitions, 465 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-27 17:54:40,340 INFO L231 Difference]: Finished difference. Result has 65 places, 54 transitions, 342 flow [2024-06-27 17:54:40,340 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=301, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=342, PETRI_PLACES=65, PETRI_TRANSITIONS=54} [2024-06-27 17:54:40,340 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 29 predicate places. [2024-06-27 17:54:40,341 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 54 transitions, 342 flow [2024-06-27 17:54:40,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:40,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:54:40,341 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:54:40,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 17:54:40,341 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:54:40,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:54:40,342 INFO L85 PathProgramCache]: Analyzing trace with hash -1763826652, now seen corresponding path program 3 times [2024-06-27 17:54:40,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:54:40,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274823281] [2024-06-27 17:54:40,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:54:40,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:54:40,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:54:40,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:54:40,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:54:40,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274823281] [2024-06-27 17:54:40,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274823281] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:54:40,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:54:40,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:54:40,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465221639] [2024-06-27 17:54:40,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:54:40,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:54:40,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:54:40,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:54:40,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:54:40,427 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 34 [2024-06-27 17:54:40,427 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 54 transitions, 342 flow. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:40,427 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:54:40,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 34 [2024-06-27 17:54:40,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:54:40,480 INFO L124 PetriNetUnfolderBase]: 204/423 cut-off events. [2024-06-27 17:54:40,481 INFO L125 PetriNetUnfolderBase]: For 1410/1410 co-relation queries the response was YES. [2024-06-27 17:54:40,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1514 conditions, 423 events. 204/423 cut-off events. For 1410/1410 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2129 event pairs, 38 based on Foata normal form. 1/421 useless extension candidates. Maximal degree in co-relation 1486. Up to 286 conditions per place. [2024-06-27 17:54:40,483 INFO L140 encePairwiseOnDemand]: 28/34 looper letters, 42 selfloop transitions, 16 changer transitions 0/69 dead transitions. [2024-06-27 17:54:40,483 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 69 transitions, 492 flow [2024-06-27 17:54:40,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:54:40,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:54:40,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 113 transitions. [2024-06-27 17:54:40,484 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6647058823529411 [2024-06-27 17:54:40,484 INFO L175 Difference]: Start difference. First operand has 65 places, 54 transitions, 342 flow. Second operand 5 states and 113 transitions. [2024-06-27 17:54:40,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 69 transitions, 492 flow [2024-06-27 17:54:40,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 69 transitions, 458 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-27 17:54:40,487 INFO L231 Difference]: Finished difference. Result has 66 places, 54 transitions, 348 flow [2024-06-27 17:54:40,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=308, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=348, PETRI_PLACES=66, PETRI_TRANSITIONS=54} [2024-06-27 17:54:40,488 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 30 predicate places. [2024-06-27 17:54:40,488 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 54 transitions, 348 flow [2024-06-27 17:54:40,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:40,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:54:40,488 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:54:40,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 17:54:40,489 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:54:40,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:54:40,489 INFO L85 PathProgramCache]: Analyzing trace with hash -1763580574, now seen corresponding path program 1 times [2024-06-27 17:54:40,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:54:40,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675897596] [2024-06-27 17:54:40,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:54:40,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:54:40,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:54:40,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:54:40,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:54:40,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675897596] [2024-06-27 17:54:40,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675897596] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:54:40,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:54:40,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:54:40,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932407228] [2024-06-27 17:54:40,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:54:40,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:54:40,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:54:40,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:54:40,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:54:40,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 34 [2024-06-27 17:54:40,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 54 transitions, 348 flow. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:40,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:54:40,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 34 [2024-06-27 17:54:40,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:54:40,642 INFO L124 PetriNetUnfolderBase]: 201/404 cut-off events. [2024-06-27 17:54:40,642 INFO L125 PetriNetUnfolderBase]: For 1219/1219 co-relation queries the response was YES. [2024-06-27 17:54:40,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1484 conditions, 404 events. 201/404 cut-off events. For 1219/1219 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 1977 event pairs, 35 based on Foata normal form. 2/404 useless extension candidates. Maximal degree in co-relation 1455. Up to 315 conditions per place. [2024-06-27 17:54:40,644 INFO L140 encePairwiseOnDemand]: 30/34 looper letters, 47 selfloop transitions, 6 changer transitions 0/64 dead transitions. [2024-06-27 17:54:40,644 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 64 transitions, 476 flow [2024-06-27 17:54:40,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 17:54:40,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 17:54:40,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 88 transitions. [2024-06-27 17:54:40,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6470588235294118 [2024-06-27 17:54:40,646 INFO L175 Difference]: Start difference. First operand has 66 places, 54 transitions, 348 flow. Second operand 4 states and 88 transitions. [2024-06-27 17:54:40,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 64 transitions, 476 flow [2024-06-27 17:54:40,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 64 transitions, 439 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-27 17:54:40,649 INFO L231 Difference]: Finished difference. Result has 66 places, 54 transitions, 327 flow [2024-06-27 17:54:40,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=311, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=327, PETRI_PLACES=66, PETRI_TRANSITIONS=54} [2024-06-27 17:54:40,649 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 30 predicate places. [2024-06-27 17:54:40,649 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 54 transitions, 327 flow [2024-06-27 17:54:40,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:40,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:54:40,650 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:54:40,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 17:54:40,650 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:54:40,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:54:40,651 INFO L85 PathProgramCache]: Analyzing trace with hash 564855730, now seen corresponding path program 1 times [2024-06-27 17:54:40,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:54:40,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051670407] [2024-06-27 17:54:40,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:54:40,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:54:40,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:54:40,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:54:40,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:54:40,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051670407] [2024-06-27 17:54:40,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051670407] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:54:40,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:54:40,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:54:40,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103943674] [2024-06-27 17:54:40,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:54:40,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:54:40,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:54:40,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:54:40,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:54:40,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 34 [2024-06-27 17:54:40,742 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 54 transitions, 327 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:40,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:54:40,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 34 [2024-06-27 17:54:40,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:54:40,815 INFO L124 PetriNetUnfolderBase]: 208/419 cut-off events. [2024-06-27 17:54:40,815 INFO L125 PetriNetUnfolderBase]: For 1166/1166 co-relation queries the response was YES. [2024-06-27 17:54:40,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1483 conditions, 419 events. 208/419 cut-off events. For 1166/1166 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2057 event pairs, 34 based on Foata normal form. 1/418 useless extension candidates. Maximal degree in co-relation 1454. Up to 227 conditions per place. [2024-06-27 17:54:40,818 INFO L140 encePairwiseOnDemand]: 26/34 looper letters, 48 selfloop transitions, 24 changer transitions 0/83 dead transitions. [2024-06-27 17:54:40,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 83 transitions, 569 flow [2024-06-27 17:54:40,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:54:40,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:54:40,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 157 transitions. [2024-06-27 17:54:40,819 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6596638655462185 [2024-06-27 17:54:40,820 INFO L175 Difference]: Start difference. First operand has 66 places, 54 transitions, 327 flow. Second operand 7 states and 157 transitions. [2024-06-27 17:54:40,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 83 transitions, 569 flow [2024-06-27 17:54:40,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 83 transitions, 557 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-27 17:54:40,823 INFO L231 Difference]: Finished difference. Result has 71 places, 58 transitions, 396 flow [2024-06-27 17:54:40,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=315, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=396, PETRI_PLACES=71, PETRI_TRANSITIONS=58} [2024-06-27 17:54:40,823 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 35 predicate places. [2024-06-27 17:54:40,823 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 58 transitions, 396 flow [2024-06-27 17:54:40,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:40,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:54:40,824 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:54:40,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 17:54:40,824 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:54:40,825 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:54:40,825 INFO L85 PathProgramCache]: Analyzing trace with hash -822926208, now seen corresponding path program 2 times [2024-06-27 17:54:40,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:54:40,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522936197] [2024-06-27 17:54:40,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:54:40,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:54:40,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:54:40,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:54:40,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:54:40,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522936197] [2024-06-27 17:54:40,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522936197] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:54:40,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:54:40,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:54:40,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417928654] [2024-06-27 17:54:40,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:54:40,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:54:40,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:54:40,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:54:40,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:54:40,919 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 34 [2024-06-27 17:54:40,920 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 58 transitions, 396 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:40,920 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:54:40,920 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 34 [2024-06-27 17:54:40,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:54:41,004 INFO L124 PetriNetUnfolderBase]: 224/452 cut-off events. [2024-06-27 17:54:41,004 INFO L125 PetriNetUnfolderBase]: For 1567/1567 co-relation queries the response was YES. [2024-06-27 17:54:41,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1719 conditions, 452 events. 224/452 cut-off events. For 1567/1567 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2303 event pairs, 34 based on Foata normal form. 1/451 useless extension candidates. Maximal degree in co-relation 1689. Up to 295 conditions per place. [2024-06-27 17:54:41,007 INFO L140 encePairwiseOnDemand]: 26/34 looper letters, 52 selfloop transitions, 21 changer transitions 0/84 dead transitions. [2024-06-27 17:54:41,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 84 transitions, 642 flow [2024-06-27 17:54:41,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:54:41,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:54:41,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 154 transitions. [2024-06-27 17:54:41,008 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6470588235294118 [2024-06-27 17:54:41,009 INFO L175 Difference]: Start difference. First operand has 71 places, 58 transitions, 396 flow. Second operand 7 states and 154 transitions. [2024-06-27 17:54:41,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 84 transitions, 642 flow [2024-06-27 17:54:41,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 84 transitions, 608 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-27 17:54:41,013 INFO L231 Difference]: Finished difference. Result has 75 places, 62 transitions, 445 flow [2024-06-27 17:54:41,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=366, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=445, PETRI_PLACES=75, PETRI_TRANSITIONS=62} [2024-06-27 17:54:41,013 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 39 predicate places. [2024-06-27 17:54:41,013 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 62 transitions, 445 flow [2024-06-27 17:54:41,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:41,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:54:41,014 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:54:41,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 17:54:41,014 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:54:41,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:54:41,015 INFO L85 PathProgramCache]: Analyzing trace with hash -822920628, now seen corresponding path program 3 times [2024-06-27 17:54:41,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:54:41,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199146639] [2024-06-27 17:54:41,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:54:41,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:54:41,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:54:41,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:54:41,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:54:41,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199146639] [2024-06-27 17:54:41,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199146639] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:54:41,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:54:41,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:54:41,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365558900] [2024-06-27 17:54:41,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:54:41,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:54:41,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:54:41,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:54:41,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:54:41,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 34 [2024-06-27 17:54:41,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 62 transitions, 445 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:41,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:54:41,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 34 [2024-06-27 17:54:41,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:54:41,200 INFO L124 PetriNetUnfolderBase]: 222/449 cut-off events. [2024-06-27 17:54:41,200 INFO L125 PetriNetUnfolderBase]: For 1685/1685 co-relation queries the response was YES. [2024-06-27 17:54:41,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1768 conditions, 449 events. 222/449 cut-off events. For 1685/1685 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2270 event pairs, 34 based on Foata normal form. 1/448 useless extension candidates. Maximal degree in co-relation 1736. Up to 293 conditions per place. [2024-06-27 17:54:41,203 INFO L140 encePairwiseOnDemand]: 26/34 looper letters, 56 selfloop transitions, 22 changer transitions 0/89 dead transitions. [2024-06-27 17:54:41,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 89 transitions, 659 flow [2024-06-27 17:54:41,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:54:41,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:54:41,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 189 transitions. [2024-06-27 17:54:41,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6176470588235294 [2024-06-27 17:54:41,205 INFO L175 Difference]: Start difference. First operand has 75 places, 62 transitions, 445 flow. Second operand 9 states and 189 transitions. [2024-06-27 17:54:41,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 89 transitions, 659 flow [2024-06-27 17:54:41,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 89 transitions, 630 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-27 17:54:41,209 INFO L231 Difference]: Finished difference. Result has 81 places, 62 transitions, 465 flow [2024-06-27 17:54:41,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=416, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=465, PETRI_PLACES=81, PETRI_TRANSITIONS=62} [2024-06-27 17:54:41,209 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 45 predicate places. [2024-06-27 17:54:41,210 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 62 transitions, 465 flow [2024-06-27 17:54:41,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:41,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:54:41,210 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:54:41,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 17:54:41,210 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:54:41,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:54:41,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1163300688, now seen corresponding path program 4 times [2024-06-27 17:54:41,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:54:41,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497709948] [2024-06-27 17:54:41,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:54:41,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:54:41,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:54:41,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:54:41,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:54:41,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497709948] [2024-06-27 17:54:41,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497709948] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:54:41,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:54:41,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:54:41,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961369533] [2024-06-27 17:54:41,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:54:41,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:54:41,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:54:41,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:54:41,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:54:41,324 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 34 [2024-06-27 17:54:41,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 62 transitions, 465 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:41,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:54:41,325 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 34 [2024-06-27 17:54:41,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:54:41,428 INFO L124 PetriNetUnfolderBase]: 229/476 cut-off events. [2024-06-27 17:54:41,428 INFO L125 PetriNetUnfolderBase]: For 2052/2052 co-relation queries the response was YES. [2024-06-27 17:54:41,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1908 conditions, 476 events. 229/476 cut-off events. For 2052/2052 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2481 event pairs, 34 based on Foata normal form. 1/474 useless extension candidates. Maximal degree in co-relation 1874. Up to 319 conditions per place. [2024-06-27 17:54:41,431 INFO L140 encePairwiseOnDemand]: 26/34 looper letters, 54 selfloop transitions, 17 changer transitions 0/82 dead transitions. [2024-06-27 17:54:41,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 82 transitions, 667 flow [2024-06-27 17:54:41,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:54:41,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:54:41,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 118 transitions. [2024-06-27 17:54:41,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6941176470588235 [2024-06-27 17:54:41,432 INFO L175 Difference]: Start difference. First operand has 81 places, 62 transitions, 465 flow. Second operand 5 states and 118 transitions. [2024-06-27 17:54:41,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 82 transitions, 667 flow [2024-06-27 17:54:41,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 82 transitions, 618 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-27 17:54:41,436 INFO L231 Difference]: Finished difference. Result has 78 places, 64 transitions, 483 flow [2024-06-27 17:54:41,437 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=416, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=483, PETRI_PLACES=78, PETRI_TRANSITIONS=64} [2024-06-27 17:54:41,437 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 42 predicate places. [2024-06-27 17:54:41,437 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 64 transitions, 483 flow [2024-06-27 17:54:41,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:41,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:54:41,438 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:54:41,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 17:54:41,438 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:54:41,438 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:54:41,438 INFO L85 PathProgramCache]: Analyzing trace with hash 1291910556, now seen corresponding path program 5 times [2024-06-27 17:54:41,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:54:41,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81105217] [2024-06-27 17:54:41,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:54:41,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:54:41,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:54:41,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:54:41,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:54:41,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81105217] [2024-06-27 17:54:41,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81105217] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:54:41,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:54:41,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:54:41,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764040423] [2024-06-27 17:54:41,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:54:41,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:54:41,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:54:41,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:54:41,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:54:41,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 34 [2024-06-27 17:54:41,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 64 transitions, 483 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:41,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:54:41,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 34 [2024-06-27 17:54:41,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:54:41,631 INFO L124 PetriNetUnfolderBase]: 236/495 cut-off events. [2024-06-27 17:54:41,631 INFO L125 PetriNetUnfolderBase]: For 2381/2381 co-relation queries the response was YES. [2024-06-27 17:54:41,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2000 conditions, 495 events. 236/495 cut-off events. For 2381/2381 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2599 event pairs, 36 based on Foata normal form. 1/493 useless extension candidates. Maximal degree in co-relation 1965. Up to 273 conditions per place. [2024-06-27 17:54:41,634 INFO L140 encePairwiseOnDemand]: 26/34 looper letters, 51 selfloop transitions, 32 changer transitions 0/94 dead transitions. [2024-06-27 17:54:41,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 94 transitions, 759 flow [2024-06-27 17:54:41,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:54:41,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:54:41,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 176 transitions. [2024-06-27 17:54:41,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6470588235294118 [2024-06-27 17:54:41,635 INFO L175 Difference]: Start difference. First operand has 78 places, 64 transitions, 483 flow. Second operand 8 states and 176 transitions. [2024-06-27 17:54:41,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 94 transitions, 759 flow [2024-06-27 17:54:41,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 94 transitions, 720 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-27 17:54:41,639 INFO L231 Difference]: Finished difference. Result has 82 places, 66 transitions, 538 flow [2024-06-27 17:54:41,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=444, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=538, PETRI_PLACES=82, PETRI_TRANSITIONS=66} [2024-06-27 17:54:41,640 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 46 predicate places. [2024-06-27 17:54:41,640 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 66 transitions, 538 flow [2024-06-27 17:54:41,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:41,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:54:41,641 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:54:41,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 17:54:41,641 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:54:41,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:54:41,641 INFO L85 PathProgramCache]: Analyzing trace with hash 1543822278, now seen corresponding path program 6 times [2024-06-27 17:54:41,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:54:41,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288510350] [2024-06-27 17:54:41,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:54:41,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:54:41,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:54:41,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:54:41,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:54:41,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288510350] [2024-06-27 17:54:41,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288510350] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:54:41,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:54:41,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:54:41,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863730840] [2024-06-27 17:54:41,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:54:41,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:54:41,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:54:41,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:54:41,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:54:41,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 34 [2024-06-27 17:54:41,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 66 transitions, 538 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:41,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:54:41,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 34 [2024-06-27 17:54:41,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:54:41,809 INFO L124 PetriNetUnfolderBase]: 234/494 cut-off events. [2024-06-27 17:54:41,809 INFO L125 PetriNetUnfolderBase]: For 2640/2640 co-relation queries the response was YES. [2024-06-27 17:54:41,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2049 conditions, 494 events. 234/494 cut-off events. For 2640/2640 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2601 event pairs, 40 based on Foata normal form. 1/490 useless extension candidates. Maximal degree in co-relation 2014. Up to 271 conditions per place. [2024-06-27 17:54:41,812 INFO L140 encePairwiseOnDemand]: 26/34 looper letters, 46 selfloop transitions, 30 changer transitions 0/87 dead transitions. [2024-06-27 17:54:41,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 87 transitions, 738 flow [2024-06-27 17:54:41,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:54:41,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:54:41,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 137 transitions. [2024-06-27 17:54:41,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6715686274509803 [2024-06-27 17:54:41,813 INFO L175 Difference]: Start difference. First operand has 82 places, 66 transitions, 538 flow. Second operand 6 states and 137 transitions. [2024-06-27 17:54:41,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 87 transitions, 738 flow [2024-06-27 17:54:41,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 87 transitions, 641 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-27 17:54:41,818 INFO L231 Difference]: Finished difference. Result has 81 places, 66 transitions, 509 flow [2024-06-27 17:54:41,819 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=441, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=509, PETRI_PLACES=81, PETRI_TRANSITIONS=66} [2024-06-27 17:54:41,819 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 45 predicate places. [2024-06-27 17:54:41,819 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 66 transitions, 509 flow [2024-06-27 17:54:41,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:41,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:54:41,819 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:54:41,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 17:54:41,820 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:54:41,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:54:41,820 INFO L85 PathProgramCache]: Analyzing trace with hash 327797145, now seen corresponding path program 1 times [2024-06-27 17:54:41,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:54:41,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347837195] [2024-06-27 17:54:41,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:54:41,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:54:41,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:54:41,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:54:41,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:54:41,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347837195] [2024-06-27 17:54:41,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347837195] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:54:41,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:54:41,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:54:41,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833795772] [2024-06-27 17:54:41,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:54:41,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:54:41,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:54:41,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:54:41,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:54:41,919 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 34 [2024-06-27 17:54:41,919 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 66 transitions, 509 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:41,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:54:41,919 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 34 [2024-06-27 17:54:41,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:54:42,017 INFO L124 PetriNetUnfolderBase]: 244/494 cut-off events. [2024-06-27 17:54:42,017 INFO L125 PetriNetUnfolderBase]: For 2299/2299 co-relation queries the response was YES. [2024-06-27 17:54:42,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2024 conditions, 494 events. 244/494 cut-off events. For 2299/2299 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2575 event pairs, 10 based on Foata normal form. 2/496 useless extension candidates. Maximal degree in co-relation 1989. Up to 276 conditions per place. [2024-06-27 17:54:42,020 INFO L140 encePairwiseOnDemand]: 27/34 looper letters, 64 selfloop transitions, 19 changer transitions 0/94 dead transitions. [2024-06-27 17:54:42,020 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 94 transitions, 767 flow [2024-06-27 17:54:42,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:54:42,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:54:42,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 153 transitions. [2024-06-27 17:54:42,021 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2024-06-27 17:54:42,021 INFO L175 Difference]: Start difference. First operand has 81 places, 66 transitions, 509 flow. Second operand 7 states and 153 transitions. [2024-06-27 17:54:42,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 94 transitions, 767 flow [2024-06-27 17:54:42,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 94 transitions, 700 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-27 17:54:42,026 INFO L231 Difference]: Finished difference. Result has 82 places, 67 transitions, 490 flow [2024-06-27 17:54:42,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=444, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=490, PETRI_PLACES=82, PETRI_TRANSITIONS=67} [2024-06-27 17:54:42,026 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 46 predicate places. [2024-06-27 17:54:42,027 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 67 transitions, 490 flow [2024-06-27 17:54:42,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:42,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:54:42,027 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:54:42,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 17:54:42,027 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:54:42,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:54:42,028 INFO L85 PathProgramCache]: Analyzing trace with hash 143795817, now seen corresponding path program 2 times [2024-06-27 17:54:42,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:54:42,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513860488] [2024-06-27 17:54:42,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:54:42,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:54:42,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:54:42,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:54:42,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:54:42,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513860488] [2024-06-27 17:54:42,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513860488] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:54:42,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:54:42,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:54:42,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497608087] [2024-06-27 17:54:42,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:54:42,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:54:42,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:54:42,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:54:42,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:54:42,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 34 [2024-06-27 17:54:42,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 67 transitions, 490 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:42,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:54:42,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 34 [2024-06-27 17:54:42,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:54:42,218 INFO L124 PetriNetUnfolderBase]: 254/512 cut-off events. [2024-06-27 17:54:42,218 INFO L125 PetriNetUnfolderBase]: For 2212/2212 co-relation queries the response was YES. [2024-06-27 17:54:42,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2046 conditions, 512 events. 254/512 cut-off events. For 2212/2212 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2724 event pairs, 29 based on Foata normal form. 2/514 useless extension candidates. Maximal degree in co-relation 2011. Up to 349 conditions per place. [2024-06-27 17:54:42,221 INFO L140 encePairwiseOnDemand]: 27/34 looper letters, 64 selfloop transitions, 18 changer transitions 0/93 dead transitions. [2024-06-27 17:54:42,221 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 93 transitions, 716 flow [2024-06-27 17:54:42,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:54:42,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:54:42,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 153 transitions. [2024-06-27 17:54:42,222 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2024-06-27 17:54:42,222 INFO L175 Difference]: Start difference. First operand has 82 places, 67 transitions, 490 flow. Second operand 7 states and 153 transitions. [2024-06-27 17:54:42,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 93 transitions, 716 flow [2024-06-27 17:54:42,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 93 transitions, 679 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-27 17:54:42,227 INFO L231 Difference]: Finished difference. Result has 85 places, 68 transitions, 501 flow [2024-06-27 17:54:42,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=456, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=501, PETRI_PLACES=85, PETRI_TRANSITIONS=68} [2024-06-27 17:54:42,227 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 49 predicate places. [2024-06-27 17:54:42,227 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 68 transitions, 501 flow [2024-06-27 17:54:42,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:42,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:54:42,228 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:54:42,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 17:54:42,228 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:54:42,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:54:42,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1190454255, now seen corresponding path program 3 times [2024-06-27 17:54:42,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:54:42,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315025646] [2024-06-27 17:54:42,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:54:42,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:54:42,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:54:42,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:54:42,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:54:42,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315025646] [2024-06-27 17:54:42,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315025646] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:54:42,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:54:42,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:54:42,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609005512] [2024-06-27 17:54:42,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:54:42,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:54:42,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:54:42,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:54:42,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:54:42,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 34 [2024-06-27 17:54:42,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 68 transitions, 501 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:42,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:54:42,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 34 [2024-06-27 17:54:42,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:54:42,430 INFO L124 PetriNetUnfolderBase]: 264/538 cut-off events. [2024-06-27 17:54:42,430 INFO L125 PetriNetUnfolderBase]: For 2553/2553 co-relation queries the response was YES. [2024-06-27 17:54:42,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2108 conditions, 538 events. 264/538 cut-off events. For 2553/2553 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2921 event pairs, 29 based on Foata normal form. 2/537 useless extension candidates. Maximal degree in co-relation 2072. Up to 394 conditions per place. [2024-06-27 17:54:42,433 INFO L140 encePairwiseOnDemand]: 27/34 looper letters, 67 selfloop transitions, 13 changer transitions 0/91 dead transitions. [2024-06-27 17:54:42,433 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 91 transitions, 714 flow [2024-06-27 17:54:42,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:54:42,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:54:42,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 149 transitions. [2024-06-27 17:54:42,434 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6260504201680672 [2024-06-27 17:54:42,435 INFO L175 Difference]: Start difference. First operand has 85 places, 68 transitions, 501 flow. Second operand 7 states and 149 transitions. [2024-06-27 17:54:42,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 91 transitions, 714 flow [2024-06-27 17:54:42,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 91 transitions, 678 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-27 17:54:42,440 INFO L231 Difference]: Finished difference. Result has 87 places, 69 transitions, 502 flow [2024-06-27 17:54:42,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=465, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=502, PETRI_PLACES=87, PETRI_TRANSITIONS=69} [2024-06-27 17:54:42,441 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 51 predicate places. [2024-06-27 17:54:42,441 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 69 transitions, 502 flow [2024-06-27 17:54:42,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:42,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:54:42,441 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:54:42,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 17:54:42,442 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:54:42,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:54:42,442 INFO L85 PathProgramCache]: Analyzing trace with hash 259271685, now seen corresponding path program 1 times [2024-06-27 17:54:42,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:54:42,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377550051] [2024-06-27 17:54:42,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:54:42,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:54:42,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:54:42,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:54:42,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:54:42,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377550051] [2024-06-27 17:54:42,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377550051] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:54:42,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:54:42,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:54:42,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856557830] [2024-06-27 17:54:42,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:54:42,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:54:42,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:54:42,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:54:42,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:54:42,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 34 [2024-06-27 17:54:42,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 69 transitions, 502 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:42,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:54:42,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 34 [2024-06-27 17:54:42,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:54:42,626 INFO L124 PetriNetUnfolderBase]: 274/548 cut-off events. [2024-06-27 17:54:42,626 INFO L125 PetriNetUnfolderBase]: For 2590/2590 co-relation queries the response was YES. [2024-06-27 17:54:42,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2154 conditions, 548 events. 274/548 cut-off events. For 2590/2590 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 2949 event pairs, 32 based on Foata normal form. 2/548 useless extension candidates. Maximal degree in co-relation 2117. Up to 391 conditions per place. [2024-06-27 17:54:42,630 INFO L140 encePairwiseOnDemand]: 27/34 looper letters, 64 selfloop transitions, 17 changer transitions 0/92 dead transitions. [2024-06-27 17:54:42,630 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 92 transitions, 718 flow [2024-06-27 17:54:42,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:54:42,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:54:42,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 151 transitions. [2024-06-27 17:54:42,631 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.634453781512605 [2024-06-27 17:54:42,631 INFO L175 Difference]: Start difference. First operand has 87 places, 69 transitions, 502 flow. Second operand 7 states and 151 transitions. [2024-06-27 17:54:42,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 92 transitions, 718 flow [2024-06-27 17:54:42,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 92 transitions, 692 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-27 17:54:42,638 INFO L231 Difference]: Finished difference. Result has 89 places, 70 transitions, 522 flow [2024-06-27 17:54:42,638 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=476, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=522, PETRI_PLACES=89, PETRI_TRANSITIONS=70} [2024-06-27 17:54:42,639 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 53 predicate places. [2024-06-27 17:54:42,639 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 70 transitions, 522 flow [2024-06-27 17:54:42,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:42,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:54:42,639 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:54:42,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 17:54:42,640 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:54:42,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:54:42,640 INFO L85 PathProgramCache]: Analyzing trace with hash 1474504489, now seen corresponding path program 4 times [2024-06-27 17:54:42,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:54:42,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518965339] [2024-06-27 17:54:42,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:54:42,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:54:42,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:54:42,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:54:42,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:54:42,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518965339] [2024-06-27 17:54:42,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518965339] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:54:42,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:54:42,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:54:42,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456866318] [2024-06-27 17:54:42,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:54:42,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:54:42,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:54:42,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:54:42,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:54:42,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 34 [2024-06-27 17:54:42,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 70 transitions, 522 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:42,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:54:42,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 34 [2024-06-27 17:54:42,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:54:42,852 INFO L124 PetriNetUnfolderBase]: 271/554 cut-off events. [2024-06-27 17:54:42,852 INFO L125 PetriNetUnfolderBase]: For 2771/2771 co-relation queries the response was YES. [2024-06-27 17:54:42,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2160 conditions, 554 events. 271/554 cut-off events. For 2771/2771 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 3021 event pairs, 11 based on Foata normal form. 2/553 useless extension candidates. Maximal degree in co-relation 2122. Up to 347 conditions per place. [2024-06-27 17:54:42,856 INFO L140 encePairwiseOnDemand]: 27/34 looper letters, 63 selfloop transitions, 18 changer transitions 0/92 dead transitions. [2024-06-27 17:54:42,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 92 transitions, 734 flow [2024-06-27 17:54:42,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:54:42,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:54:42,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 134 transitions. [2024-06-27 17:54:42,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6568627450980392 [2024-06-27 17:54:42,857 INFO L175 Difference]: Start difference. First operand has 89 places, 70 transitions, 522 flow. Second operand 6 states and 134 transitions. [2024-06-27 17:54:42,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 92 transitions, 734 flow [2024-06-27 17:54:42,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 92 transitions, 698 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-27 17:54:42,864 INFO L231 Difference]: Finished difference. Result has 90 places, 70 transitions, 530 flow [2024-06-27 17:54:42,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=486, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=530, PETRI_PLACES=90, PETRI_TRANSITIONS=70} [2024-06-27 17:54:42,864 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 54 predicate places. [2024-06-27 17:54:42,864 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 70 transitions, 530 flow [2024-06-27 17:54:42,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:42,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:54:42,865 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:54:42,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 17:54:42,865 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:54:42,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:54:42,865 INFO L85 PathProgramCache]: Analyzing trace with hash 1474689187, now seen corresponding path program 2 times [2024-06-27 17:54:42,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:54:42,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65257875] [2024-06-27 17:54:42,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:54:42,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:54:42,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:54:42,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:54:42,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:54:42,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65257875] [2024-06-27 17:54:42,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65257875] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:54:42,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:54:42,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:54:42,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357391996] [2024-06-27 17:54:42,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:54:42,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:54:42,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:54:42,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:54:42,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:54:42,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 34 [2024-06-27 17:54:42,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 70 transitions, 530 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:42,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:54:42,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 34 [2024-06-27 17:54:42,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:54:43,036 INFO L124 PetriNetUnfolderBase]: 281/561 cut-off events. [2024-06-27 17:54:43,036 INFO L125 PetriNetUnfolderBase]: For 2996/2996 co-relation queries the response was YES. [2024-06-27 17:54:43,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2247 conditions, 561 events. 281/561 cut-off events. For 2996/2996 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 3029 event pairs, 31 based on Foata normal form. 2/561 useless extension candidates. Maximal degree in co-relation 2208. Up to 390 conditions per place. [2024-06-27 17:54:43,039 INFO L140 encePairwiseOnDemand]: 28/34 looper letters, 61 selfloop transitions, 18 changer transitions 0/90 dead transitions. [2024-06-27 17:54:43,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 90 transitions, 738 flow [2024-06-27 17:54:43,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:54:43,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:54:43,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 132 transitions. [2024-06-27 17:54:43,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6470588235294118 [2024-06-27 17:54:43,041 INFO L175 Difference]: Start difference. First operand has 90 places, 70 transitions, 530 flow. Second operand 6 states and 132 transitions. [2024-06-27 17:54:43,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 90 transitions, 738 flow [2024-06-27 17:54:43,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 90 transitions, 692 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-27 17:54:43,048 INFO L231 Difference]: Finished difference. Result has 90 places, 71 transitions, 536 flow [2024-06-27 17:54:43,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=484, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=536, PETRI_PLACES=90, PETRI_TRANSITIONS=71} [2024-06-27 17:54:43,048 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 54 predicate places. [2024-06-27 17:54:43,048 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 71 transitions, 536 flow [2024-06-27 17:54:43,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:43,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:54:43,049 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:54:43,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 17:54:43,049 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:54:43,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:54:43,049 INFO L85 PathProgramCache]: Analyzing trace with hash 1710864547, now seen corresponding path program 3 times [2024-06-27 17:54:43,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:54:43,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721483489] [2024-06-27 17:54:43,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:54:43,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:54:43,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:54:43,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:54:43,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:54:43,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721483489] [2024-06-27 17:54:43,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721483489] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:54:43,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:54:43,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:54:43,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117994899] [2024-06-27 17:54:43,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:54:43,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:54:43,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:54:43,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:54:43,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:54:43,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 34 [2024-06-27 17:54:43,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 71 transitions, 536 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:43,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:54:43,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 34 [2024-06-27 17:54:43,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:54:43,252 INFO L124 PetriNetUnfolderBase]: 291/591 cut-off events. [2024-06-27 17:54:43,253 INFO L125 PetriNetUnfolderBase]: For 2956/2956 co-relation queries the response was YES. [2024-06-27 17:54:43,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2316 conditions, 591 events. 291/591 cut-off events. For 2956/2956 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3257 event pairs, 37 based on Foata normal form. 2/587 useless extension candidates. Maximal degree in co-relation 2277. Up to 436 conditions per place. [2024-06-27 17:54:43,256 INFO L140 encePairwiseOnDemand]: 28/34 looper letters, 64 selfloop transitions, 13 changer transitions 0/88 dead transitions. [2024-06-27 17:54:43,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 88 transitions, 736 flow [2024-06-27 17:54:43,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:54:43,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:54:43,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 113 transitions. [2024-06-27 17:54:43,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6647058823529411 [2024-06-27 17:54:43,257 INFO L175 Difference]: Start difference. First operand has 90 places, 71 transitions, 536 flow. Second operand 5 states and 113 transitions. [2024-06-27 17:54:43,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 88 transitions, 736 flow [2024-06-27 17:54:43,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 88 transitions, 694 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-27 17:54:43,264 INFO L231 Difference]: Finished difference. Result has 91 places, 72 transitions, 536 flow [2024-06-27 17:54:43,264 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=496, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=536, PETRI_PLACES=91, PETRI_TRANSITIONS=72} [2024-06-27 17:54:43,264 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 55 predicate places. [2024-06-27 17:54:43,264 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 72 transitions, 536 flow [2024-06-27 17:54:43,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:43,265 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:54:43,265 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:54:43,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 17:54:43,265 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:54:43,265 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:54:43,265 INFO L85 PathProgramCache]: Analyzing trace with hash 1711161217, now seen corresponding path program 4 times [2024-06-27 17:54:43,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:54:43,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065012688] [2024-06-27 17:54:43,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:54:43,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:54:43,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:54:43,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:54:43,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:54:43,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065012688] [2024-06-27 17:54:43,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065012688] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:54:43,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:54:43,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:54:43,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821389988] [2024-06-27 17:54:43,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:54:43,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:54:43,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:54:43,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:54:43,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:54:43,369 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 34 [2024-06-27 17:54:43,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 72 transitions, 536 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:43,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:54:43,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 34 [2024-06-27 17:54:43,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:54:43,463 INFO L124 PetriNetUnfolderBase]: 288/586 cut-off events. [2024-06-27 17:54:43,463 INFO L125 PetriNetUnfolderBase]: For 2591/2591 co-relation queries the response was YES. [2024-06-27 17:54:43,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2233 conditions, 586 events. 288/586 cut-off events. For 2591/2591 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3253 event pairs, 32 based on Foata normal form. 2/582 useless extension candidates. Maximal degree in co-relation 2193. Up to 399 conditions per place. [2024-06-27 17:54:43,467 INFO L140 encePairwiseOnDemand]: 28/34 looper letters, 66 selfloop transitions, 15 changer transitions 0/92 dead transitions. [2024-06-27 17:54:43,467 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 92 transitions, 742 flow [2024-06-27 17:54:43,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:54:43,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:54:43,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 132 transitions. [2024-06-27 17:54:43,468 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6470588235294118 [2024-06-27 17:54:43,468 INFO L175 Difference]: Start difference. First operand has 91 places, 72 transitions, 536 flow. Second operand 6 states and 132 transitions. [2024-06-27 17:54:43,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 92 transitions, 742 flow [2024-06-27 17:54:43,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 92 transitions, 712 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-27 17:54:43,475 INFO L231 Difference]: Finished difference. Result has 94 places, 72 transitions, 540 flow [2024-06-27 17:54:43,475 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=506, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=540, PETRI_PLACES=94, PETRI_TRANSITIONS=72} [2024-06-27 17:54:43,475 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 58 predicate places. [2024-06-27 17:54:43,475 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 72 transitions, 540 flow [2024-06-27 17:54:43,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:43,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:54:43,476 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:54:43,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 17:54:43,476 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:54:43,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:54:43,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1550730355, now seen corresponding path program 1 times [2024-06-27 17:54:43,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:54:43,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584054495] [2024-06-27 17:54:43,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:54:43,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:54:43,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:54:43,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:54:43,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:54:43,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584054495] [2024-06-27 17:54:43,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584054495] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:54:43,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:54:43,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:54:43,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300763137] [2024-06-27 17:54:43,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:54:43,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 17:54:43,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:54:43,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 17:54:43,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 17:54:43,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 34 [2024-06-27 17:54:43,548 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 72 transitions, 540 flow. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:43,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:54:43,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 34 [2024-06-27 17:54:43,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:54:43,593 INFO L124 PetriNetUnfolderBase]: 148/433 cut-off events. [2024-06-27 17:54:43,593 INFO L125 PetriNetUnfolderBase]: For 1023/1028 co-relation queries the response was YES. [2024-06-27 17:54:43,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1289 conditions, 433 events. 148/433 cut-off events. For 1023/1028 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2498 event pairs, 7 based on Foata normal form. 27/412 useless extension candidates. Maximal degree in co-relation 1248. Up to 151 conditions per place. [2024-06-27 17:54:43,596 INFO L140 encePairwiseOnDemand]: 29/34 looper letters, 19 selfloop transitions, 22 changer transitions 1/81 dead transitions. [2024-06-27 17:54:43,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 81 transitions, 654 flow [2024-06-27 17:54:43,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 17:54:43,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 17:54:43,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 102 transitions. [2024-06-27 17:54:43,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.75 [2024-06-27 17:54:43,597 INFO L175 Difference]: Start difference. First operand has 94 places, 72 transitions, 540 flow. Second operand 4 states and 102 transitions. [2024-06-27 17:54:43,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 81 transitions, 654 flow [2024-06-27 17:54:43,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 81 transitions, 604 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-27 17:54:43,601 INFO L231 Difference]: Finished difference. Result has 94 places, 72 transitions, 580 flow [2024-06-27 17:54:43,601 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=490, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=580, PETRI_PLACES=94, PETRI_TRANSITIONS=72} [2024-06-27 17:54:43,602 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 58 predicate places. [2024-06-27 17:54:43,602 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 72 transitions, 580 flow [2024-06-27 17:54:43,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:43,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:54:43,602 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:54:43,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 17:54:43,603 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:54:43,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:54:43,603 INFO L85 PathProgramCache]: Analyzing trace with hash 422152095, now seen corresponding path program 1 times [2024-06-27 17:54:43,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:54:43,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329613068] [2024-06-27 17:54:43,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:54:43,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:54:43,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:54:43,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:54:43,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:54:43,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329613068] [2024-06-27 17:54:43,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329613068] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:54:43,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:54:43,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:54:43,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184127416] [2024-06-27 17:54:43,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:54:43,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:54:43,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:54:43,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:54:43,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:54:43,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 34 [2024-06-27 17:54:43,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 72 transitions, 580 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:43,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:54:43,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 34 [2024-06-27 17:54:43,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:54:43,830 INFO L124 PetriNetUnfolderBase]: 263/610 cut-off events. [2024-06-27 17:54:43,830 INFO L125 PetriNetUnfolderBase]: For 4171/4171 co-relation queries the response was YES. [2024-06-27 17:54:43,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2170 conditions, 610 events. 263/610 cut-off events. For 4171/4171 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3395 event pairs, 95 based on Foata normal form. 6/590 useless extension candidates. Maximal degree in co-relation 2127. Up to 190 conditions per place. [2024-06-27 17:54:43,834 INFO L140 encePairwiseOnDemand]: 26/34 looper letters, 58 selfloop transitions, 32 changer transitions 0/101 dead transitions. [2024-06-27 17:54:43,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 101 transitions, 882 flow [2024-06-27 17:54:43,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:54:43,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:54:43,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 172 transitions. [2024-06-27 17:54:43,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6323529411764706 [2024-06-27 17:54:43,835 INFO L175 Difference]: Start difference. First operand has 94 places, 72 transitions, 580 flow. Second operand 8 states and 172 transitions. [2024-06-27 17:54:43,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 101 transitions, 882 flow [2024-06-27 17:54:43,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 101 transitions, 782 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-27 17:54:43,844 INFO L231 Difference]: Finished difference. Result has 97 places, 72 transitions, 563 flow [2024-06-27 17:54:43,844 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=496, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=563, PETRI_PLACES=97, PETRI_TRANSITIONS=72} [2024-06-27 17:54:43,844 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 61 predicate places. [2024-06-27 17:54:43,844 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 72 transitions, 563 flow [2024-06-27 17:54:43,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:43,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:54:43,845 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:54:43,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 17:54:43,845 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:54:43,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:54:43,845 INFO L85 PathProgramCache]: Analyzing trace with hash 162703619, now seen corresponding path program 2 times [2024-06-27 17:54:43,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:54:43,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856229418] [2024-06-27 17:54:43,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:54:43,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:54:43,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:54:43,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:54:43,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:54:43,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856229418] [2024-06-27 17:54:43,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856229418] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:54:43,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:54:43,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:54:43,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268124003] [2024-06-27 17:54:43,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:54:43,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:54:43,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:54:43,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:54:43,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:54:43,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 34 [2024-06-27 17:54:43,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 72 transitions, 563 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:43,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:54:43,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 34 [2024-06-27 17:54:43,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:54:44,090 INFO L124 PetriNetUnfolderBase]: 327/735 cut-off events. [2024-06-27 17:54:44,090 INFO L125 PetriNetUnfolderBase]: For 5321/5321 co-relation queries the response was YES. [2024-06-27 17:54:44,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2522 conditions, 735 events. 327/735 cut-off events. For 5321/5321 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 4390 event pairs, 145 based on Foata normal form. 6/707 useless extension candidates. Maximal degree in co-relation 2481. Up to 396 conditions per place. [2024-06-27 17:54:44,097 INFO L140 encePairwiseOnDemand]: 26/34 looper letters, 56 selfloop transitions, 32 changer transitions 0/99 dead transitions. [2024-06-27 17:54:44,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 99 transitions, 847 flow [2024-06-27 17:54:44,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:54:44,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:54:44,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 173 transitions. [2024-06-27 17:54:44,099 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6360294117647058 [2024-06-27 17:54:44,099 INFO L175 Difference]: Start difference. First operand has 97 places, 72 transitions, 563 flow. Second operand 8 states and 173 transitions. [2024-06-27 17:54:44,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 99 transitions, 847 flow [2024-06-27 17:54:44,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 99 transitions, 784 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 17:54:44,108 INFO L231 Difference]: Finished difference. Result has 99 places, 72 transitions, 567 flow [2024-06-27 17:54:44,108 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=500, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=567, PETRI_PLACES=99, PETRI_TRANSITIONS=72} [2024-06-27 17:54:44,111 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 63 predicate places. [2024-06-27 17:54:44,111 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 72 transitions, 567 flow [2024-06-27 17:54:44,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:44,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:54:44,111 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:54:44,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 17:54:44,112 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:54:44,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:54:44,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1612244067, now seen corresponding path program 3 times [2024-06-27 17:54:44,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:54:44,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355397025] [2024-06-27 17:54:44,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:54:44,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:54:44,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:54:44,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:54:44,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:54:44,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355397025] [2024-06-27 17:54:44,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355397025] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:54:44,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:54:44,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:54:44,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650077188] [2024-06-27 17:54:44,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:54:44,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:54:44,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:54:44,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:54:44,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:54:44,227 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 34 [2024-06-27 17:54:44,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 72 transitions, 567 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:44,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:54:44,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 34 [2024-06-27 17:54:44,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:54:44,323 INFO L124 PetriNetUnfolderBase]: 288/650 cut-off events. [2024-06-27 17:54:44,323 INFO L125 PetriNetUnfolderBase]: For 3702/3702 co-relation queries the response was YES. [2024-06-27 17:54:44,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2091 conditions, 650 events. 288/650 cut-off events. For 3702/3702 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 3757 event pairs, 130 based on Foata normal form. 8/625 useless extension candidates. Maximal degree in co-relation 2049. Up to 403 conditions per place. [2024-06-27 17:54:44,326 INFO L140 encePairwiseOnDemand]: 26/34 looper letters, 50 selfloop transitions, 32 changer transitions 0/93 dead transitions. [2024-06-27 17:54:44,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 93 transitions, 787 flow [2024-06-27 17:54:44,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:54:44,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:54:44,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 167 transitions. [2024-06-27 17:54:44,327 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6139705882352942 [2024-06-27 17:54:44,327 INFO L175 Difference]: Start difference. First operand has 99 places, 72 transitions, 567 flow. Second operand 8 states and 167 transitions. [2024-06-27 17:54:44,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 93 transitions, 787 flow [2024-06-27 17:54:44,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 93 transitions, 724 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 17:54:44,335 INFO L231 Difference]: Finished difference. Result has 101 places, 72 transitions, 572 flow [2024-06-27 17:54:44,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=504, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=572, PETRI_PLACES=101, PETRI_TRANSITIONS=72} [2024-06-27 17:54:44,335 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 65 predicate places. [2024-06-27 17:54:44,336 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 72 transitions, 572 flow [2024-06-27 17:54:44,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:44,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:54:44,336 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:54:44,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 17:54:44,336 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:54:44,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:54:44,337 INFO L85 PathProgramCache]: Analyzing trace with hash -558089537, now seen corresponding path program 4 times [2024-06-27 17:54:44,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:54:44,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605558770] [2024-06-27 17:54:44,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:54:44,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:54:44,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:54:44,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:54:44,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:54:44,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605558770] [2024-06-27 17:54:44,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605558770] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:54:44,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:54:44,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:54:44,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523105936] [2024-06-27 17:54:44,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:54:44,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:54:44,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:54:44,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:54:44,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:54:44,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 34 [2024-06-27 17:54:44,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 72 transitions, 572 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:44,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:54:44,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 34 [2024-06-27 17:54:44,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:54:44,566 INFO L124 PetriNetUnfolderBase]: 320/727 cut-off events. [2024-06-27 17:54:44,566 INFO L125 PetriNetUnfolderBase]: For 4027/4027 co-relation queries the response was YES. [2024-06-27 17:54:44,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2275 conditions, 727 events. 320/727 cut-off events. For 4027/4027 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 4409 event pairs, 156 based on Foata normal form. 8/697 useless extension candidates. Maximal degree in co-relation 2232. Up to 494 conditions per place. [2024-06-27 17:54:44,569 INFO L140 encePairwiseOnDemand]: 26/34 looper letters, 58 selfloop transitions, 21 changer transitions 0/90 dead transitions. [2024-06-27 17:54:44,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 90 transitions, 778 flow [2024-06-27 17:54:44,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:54:44,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:54:44,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 164 transitions. [2024-06-27 17:54:44,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6029411764705882 [2024-06-27 17:54:44,570 INFO L175 Difference]: Start difference. First operand has 101 places, 72 transitions, 572 flow. Second operand 8 states and 164 transitions. [2024-06-27 17:54:44,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 90 transitions, 778 flow [2024-06-27 17:54:44,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 90 transitions, 716 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 17:54:44,578 INFO L231 Difference]: Finished difference. Result has 103 places, 72 transitions, 556 flow [2024-06-27 17:54:44,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=510, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=556, PETRI_PLACES=103, PETRI_TRANSITIONS=72} [2024-06-27 17:54:44,579 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 67 predicate places. [2024-06-27 17:54:44,579 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 72 transitions, 556 flow [2024-06-27 17:54:44,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:44,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:54:44,579 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:54:44,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 17:54:44,579 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:54:44,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:54:44,580 INFO L85 PathProgramCache]: Analyzing trace with hash 939402225, now seen corresponding path program 5 times [2024-06-27 17:54:44,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:54:44,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426519481] [2024-06-27 17:54:44,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:54:44,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:54:44,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:54:44,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:54:44,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:54:44,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426519481] [2024-06-27 17:54:44,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426519481] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:54:44,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:54:44,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:54:44,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552484017] [2024-06-27 17:54:44,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:54:44,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:54:44,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:54:44,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:54:44,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:54:44,696 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 34 [2024-06-27 17:54:44,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 72 transitions, 556 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:44,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:54:44,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 34 [2024-06-27 17:54:44,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:54:44,831 INFO L124 PetriNetUnfolderBase]: 384/885 cut-off events. [2024-06-27 17:54:44,831 INFO L125 PetriNetUnfolderBase]: For 5625/5625 co-relation queries the response was YES. [2024-06-27 17:54:44,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2773 conditions, 885 events. 384/885 cut-off events. For 5625/5625 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 5728 event pairs, 192 based on Foata normal form. 6/845 useless extension candidates. Maximal degree in co-relation 2729. Up to 470 conditions per place. [2024-06-27 17:54:44,835 INFO L140 encePairwiseOnDemand]: 26/34 looper letters, 64 selfloop transitions, 21 changer transitions 0/96 dead transitions. [2024-06-27 17:54:44,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 96 transitions, 832 flow [2024-06-27 17:54:44,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:54:44,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:54:44,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 169 transitions. [2024-06-27 17:54:44,836 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6213235294117647 [2024-06-27 17:54:44,836 INFO L175 Difference]: Start difference. First operand has 103 places, 72 transitions, 556 flow. Second operand 8 states and 169 transitions. [2024-06-27 17:54:44,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 96 transitions, 832 flow [2024-06-27 17:54:44,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 96 transitions, 792 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 17:54:44,849 INFO L231 Difference]: Finished difference. Result has 105 places, 72 transitions, 561 flow [2024-06-27 17:54:44,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=516, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=561, PETRI_PLACES=105, PETRI_TRANSITIONS=72} [2024-06-27 17:54:44,849 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 69 predicate places. [2024-06-27 17:54:44,850 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 72 transitions, 561 flow [2024-06-27 17:54:44,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:44,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:54:44,850 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:54:44,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 17:54:44,850 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:54:44,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:54:44,851 INFO L85 PathProgramCache]: Analyzing trace with hash 944912475, now seen corresponding path program 6 times [2024-06-27 17:54:44,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:54:44,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949309819] [2024-06-27 17:54:44,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:54:44,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:54:44,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:54:44,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:54:44,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:54:44,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949309819] [2024-06-27 17:54:44,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949309819] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:54:44,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:54:44,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:54:44,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788003783] [2024-06-27 17:54:44,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:54:44,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:54:44,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:54:44,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:54:44,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:54:44,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 34 [2024-06-27 17:54:44,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 72 transitions, 561 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:44,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:54:44,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 34 [2024-06-27 17:54:44,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:54:45,108 INFO L124 PetriNetUnfolderBase]: 374/855 cut-off events. [2024-06-27 17:54:45,108 INFO L125 PetriNetUnfolderBase]: For 4709/4709 co-relation queries the response was YES. [2024-06-27 17:54:45,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2568 conditions, 855 events. 374/855 cut-off events. For 4709/4709 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 5540 event pairs, 200 based on Foata normal form. 8/816 useless extension candidates. Maximal degree in co-relation 2523. Up to 604 conditions per place. [2024-06-27 17:54:45,112 INFO L140 encePairwiseOnDemand]: 26/34 looper letters, 59 selfloop transitions, 22 changer transitions 0/92 dead transitions. [2024-06-27 17:54:45,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 92 transitions, 775 flow [2024-06-27 17:54:45,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:54:45,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:54:45,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-27 17:54:45,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5764705882352941 [2024-06-27 17:54:45,113 INFO L175 Difference]: Start difference. First operand has 105 places, 72 transitions, 561 flow. Second operand 10 states and 196 transitions. [2024-06-27 17:54:45,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 92 transitions, 775 flow [2024-06-27 17:54:45,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 92 transitions, 734 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 17:54:45,123 INFO L231 Difference]: Finished difference. Result has 109 places, 72 transitions, 568 flow [2024-06-27 17:54:45,123 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=520, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=568, PETRI_PLACES=109, PETRI_TRANSITIONS=72} [2024-06-27 17:54:45,124 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 73 predicate places. [2024-06-27 17:54:45,124 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 72 transitions, 568 flow [2024-06-27 17:54:45,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:45,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:54:45,124 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:54:45,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 17:54:45,124 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:54:45,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:54:45,125 INFO L85 PathProgramCache]: Analyzing trace with hash 945127677, now seen corresponding path program 1 times [2024-06-27 17:54:45,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:54:45,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810288606] [2024-06-27 17:54:45,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:54:45,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:54:45,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:54:45,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:54:45,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:54:45,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810288606] [2024-06-27 17:54:45,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810288606] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:54:45,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:54:45,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:54:45,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959962023] [2024-06-27 17:54:45,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:54:45,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:54:45,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:54:45,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:54:45,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:54:45,307 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 34 [2024-06-27 17:54:45,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 72 transitions, 568 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:45,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:54:45,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 34 [2024-06-27 17:54:45,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:54:45,443 INFO L124 PetriNetUnfolderBase]: 396/929 cut-off events. [2024-06-27 17:54:45,443 INFO L125 PetriNetUnfolderBase]: For 4519/4519 co-relation queries the response was YES. [2024-06-27 17:54:45,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2717 conditions, 929 events. 396/929 cut-off events. For 4519/4519 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 6147 event pairs, 208 based on Foata normal form. 6/888 useless extension candidates. Maximal degree in co-relation 2671. Up to 516 conditions per place. [2024-06-27 17:54:45,448 INFO L140 encePairwiseOnDemand]: 26/34 looper letters, 63 selfloop transitions, 23 changer transitions 0/97 dead transitions. [2024-06-27 17:54:45,448 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 97 transitions, 806 flow [2024-06-27 17:54:45,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:54:45,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:54:45,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 200 transitions. [2024-06-27 17:54:45,449 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5882352941176471 [2024-06-27 17:54:45,449 INFO L175 Difference]: Start difference. First operand has 109 places, 72 transitions, 568 flow. Second operand 10 states and 200 transitions. [2024-06-27 17:54:45,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 97 transitions, 806 flow [2024-06-27 17:54:45,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 97 transitions, 764 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-27 17:54:45,460 INFO L231 Difference]: Finished difference. Result has 111 places, 72 transitions, 575 flow [2024-06-27 17:54:45,460 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=526, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=575, PETRI_PLACES=111, PETRI_TRANSITIONS=72} [2024-06-27 17:54:45,460 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 75 predicate places. [2024-06-27 17:54:45,460 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 72 transitions, 575 flow [2024-06-27 17:54:45,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:45,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:54:45,461 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:54:45,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 17:54:45,461 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:54:45,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:54:45,461 INFO L85 PathProgramCache]: Analyzing trace with hash 1240478095, now seen corresponding path program 7 times [2024-06-27 17:54:45,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:54:45,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913183086] [2024-06-27 17:54:45,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:54:45,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:54:45,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:54:45,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:54:45,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:54:45,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913183086] [2024-06-27 17:54:45,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913183086] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:54:45,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:54:45,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:54:45,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317103412] [2024-06-27 17:54:45,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:54:45,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:54:45,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:54:45,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:54:45,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:54:45,593 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 34 [2024-06-27 17:54:45,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 72 transitions, 575 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:45,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:54:45,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 34 [2024-06-27 17:54:45,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:54:45,727 INFO L124 PetriNetUnfolderBase]: 428/1022 cut-off events. [2024-06-27 17:54:45,727 INFO L125 PetriNetUnfolderBase]: For 5523/5523 co-relation queries the response was YES. [2024-06-27 17:54:45,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2927 conditions, 1022 events. 428/1022 cut-off events. For 5523/5523 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 7040 event pairs, 205 based on Foata normal form. 8/978 useless extension candidates. Maximal degree in co-relation 2880. Up to 681 conditions per place. [2024-06-27 17:54:45,732 INFO L140 encePairwiseOnDemand]: 26/34 looper letters, 61 selfloop transitions, 19 changer transitions 0/91 dead transitions. [2024-06-27 17:54:45,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 91 transitions, 787 flow [2024-06-27 17:54:45,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:54:45,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:54:45,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 134 transitions. [2024-06-27 17:54:45,733 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6568627450980392 [2024-06-27 17:54:45,733 INFO L175 Difference]: Start difference. First operand has 111 places, 72 transitions, 575 flow. Second operand 6 states and 134 transitions. [2024-06-27 17:54:45,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 91 transitions, 787 flow [2024-06-27 17:54:45,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 91 transitions, 742 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-27 17:54:45,743 INFO L231 Difference]: Finished difference. Result has 109 places, 72 transitions, 576 flow [2024-06-27 17:54:45,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=530, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=576, PETRI_PLACES=109, PETRI_TRANSITIONS=72} [2024-06-27 17:54:45,744 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 73 predicate places. [2024-06-27 17:54:45,744 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 72 transitions, 576 flow [2024-06-27 17:54:45,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:45,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:54:45,744 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:54:45,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 17:54:45,744 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:54:45,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:54:45,745 INFO L85 PathProgramCache]: Analyzing trace with hash -1534852639, now seen corresponding path program 8 times [2024-06-27 17:54:45,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:54:45,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208520312] [2024-06-27 17:54:45,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:54:45,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:54:45,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:54:45,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:54:45,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:54:45,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208520312] [2024-06-27 17:54:45,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208520312] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:54:45,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:54:45,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:54:45,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274014077] [2024-06-27 17:54:45,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:54:45,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:54:45,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:54:45,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:54:45,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:54:45,870 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 34 [2024-06-27 17:54:45,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 72 transitions, 576 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:45,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:54:45,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 34 [2024-06-27 17:54:45,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:54:46,022 INFO L124 PetriNetUnfolderBase]: 460/1057 cut-off events. [2024-06-27 17:54:46,023 INFO L125 PetriNetUnfolderBase]: For 6067/6067 co-relation queries the response was YES. [2024-06-27 17:54:46,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3092 conditions, 1057 events. 460/1057 cut-off events. For 6067/6067 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 7438 event pairs, 264 based on Foata normal form. 8/1004 useless extension candidates. Maximal degree in co-relation 3044. Up to 689 conditions per place. [2024-06-27 17:54:46,028 INFO L140 encePairwiseOnDemand]: 26/34 looper letters, 51 selfloop transitions, 30 changer transitions 0/92 dead transitions. [2024-06-27 17:54:46,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 92 transitions, 792 flow [2024-06-27 17:54:46,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:54:46,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:54:46,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 150 transitions. [2024-06-27 17:54:46,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6302521008403361 [2024-06-27 17:54:46,030 INFO L175 Difference]: Start difference. First operand has 109 places, 72 transitions, 576 flow. Second operand 7 states and 150 transitions. [2024-06-27 17:54:46,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 92 transitions, 792 flow [2024-06-27 17:54:46,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 92 transitions, 756 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-27 17:54:46,046 INFO L231 Difference]: Finished difference. Result has 111 places, 72 transitions, 606 flow [2024-06-27 17:54:46,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=540, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=606, PETRI_PLACES=111, PETRI_TRANSITIONS=72} [2024-06-27 17:54:46,047 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 75 predicate places. [2024-06-27 17:54:46,047 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 72 transitions, 606 flow [2024-06-27 17:54:46,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:46,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:54:46,047 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:54:46,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 17:54:46,048 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:54:46,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:54:46,048 INFO L85 PathProgramCache]: Analyzing trace with hash 280509659, now seen corresponding path program 9 times [2024-06-27 17:54:46,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:54:46,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428825125] [2024-06-27 17:54:46,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:54:46,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:54:46,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:54:46,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:54:46,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:54:46,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428825125] [2024-06-27 17:54:46,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428825125] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:54:46,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:54:46,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:54:46,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677177163] [2024-06-27 17:54:46,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:54:46,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:54:46,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:54:46,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:54:46,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:54:46,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 34 [2024-06-27 17:54:46,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 72 transitions, 606 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:46,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:54:46,178 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 34 [2024-06-27 17:54:46,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:54:46,325 INFO L124 PetriNetUnfolderBase]: 492/1134 cut-off events. [2024-06-27 17:54:46,325 INFO L125 PetriNetUnfolderBase]: For 6477/6477 co-relation queries the response was YES. [2024-06-27 17:54:46,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3278 conditions, 1134 events. 492/1134 cut-off events. For 6477/6477 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 8080 event pairs, 290 based on Foata normal form. 8/1074 useless extension candidates. Maximal degree in co-relation 3230. Up to 753 conditions per place. [2024-06-27 17:54:46,331 INFO L140 encePairwiseOnDemand]: 26/34 looper letters, 51 selfloop transitions, 32 changer transitions 0/94 dead transitions. [2024-06-27 17:54:46,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 94 transitions, 830 flow [2024-06-27 17:54:46,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:54:46,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:54:46,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 184 transitions. [2024-06-27 17:54:46,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6013071895424836 [2024-06-27 17:54:46,332 INFO L175 Difference]: Start difference. First operand has 111 places, 72 transitions, 606 flow. Second operand 9 states and 184 transitions. [2024-06-27 17:54:46,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 94 transitions, 830 flow [2024-06-27 17:54:46,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 94 transitions, 770 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-27 17:54:46,347 INFO L231 Difference]: Finished difference. Result has 114 places, 72 transitions, 616 flow [2024-06-27 17:54:46,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=546, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=616, PETRI_PLACES=114, PETRI_TRANSITIONS=72} [2024-06-27 17:54:46,347 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 78 predicate places. [2024-06-27 17:54:46,347 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 72 transitions, 616 flow [2024-06-27 17:54:46,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:46,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:54:46,348 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:54:46,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 17:54:46,348 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:54:46,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:54:46,348 INFO L85 PathProgramCache]: Analyzing trace with hash 274999409, now seen corresponding path program 10 times [2024-06-27 17:54:46,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:54:46,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132493696] [2024-06-27 17:54:46,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:54:46,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:54:46,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:54:46,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:54:46,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:54:46,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132493696] [2024-06-27 17:54:46,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132493696] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:54:46,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:54:46,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:54:46,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480282303] [2024-06-27 17:54:46,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:54:46,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:54:46,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:54:46,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:54:46,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:54:46,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 34 [2024-06-27 17:54:46,458 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 72 transitions, 616 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:46,458 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:54:46,458 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 34 [2024-06-27 17:54:46,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:54:46,648 INFO L124 PetriNetUnfolderBase]: 501/1157 cut-off events. [2024-06-27 17:54:46,649 INFO L125 PetriNetUnfolderBase]: For 5129/5129 co-relation queries the response was YES. [2024-06-27 17:54:46,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3280 conditions, 1157 events. 501/1157 cut-off events. For 5129/5129 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 8326 event pairs, 225 based on Foata normal form. 6/1101 useless extension candidates. Maximal degree in co-relation 3232. Up to 416 conditions per place. [2024-06-27 17:54:46,654 INFO L140 encePairwiseOnDemand]: 26/34 looper letters, 55 selfloop transitions, 31 changer transitions 0/97 dead transitions. [2024-06-27 17:54:46,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 97 transitions, 856 flow [2024-06-27 17:54:46,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:54:46,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:54:46,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 154 transitions. [2024-06-27 17:54:46,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6470588235294118 [2024-06-27 17:54:46,655 INFO L175 Difference]: Start difference. First operand has 114 places, 72 transitions, 616 flow. Second operand 7 states and 154 transitions. [2024-06-27 17:54:46,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 97 transitions, 856 flow [2024-06-27 17:54:46,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 97 transitions, 792 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-27 17:54:46,670 INFO L231 Difference]: Finished difference. Result has 113 places, 72 transitions, 618 flow [2024-06-27 17:54:46,670 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=552, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=618, PETRI_PLACES=113, PETRI_TRANSITIONS=72} [2024-06-27 17:54:46,670 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 77 predicate places. [2024-06-27 17:54:46,670 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 72 transitions, 618 flow [2024-06-27 17:54:46,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:46,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:54:46,671 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:54:46,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 17:54:46,671 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:54:46,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:54:46,671 INFO L85 PathProgramCache]: Analyzing trace with hash 474664271, now seen corresponding path program 2 times [2024-06-27 17:54:46,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:54:46,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352307045] [2024-06-27 17:54:46,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:54:46,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:54:46,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:54:46,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:54:46,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:54:46,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352307045] [2024-06-27 17:54:46,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352307045] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:54:46,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:54:46,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:54:46,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291762437] [2024-06-27 17:54:46,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:54:46,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:54:46,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:54:46,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:54:46,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:54:46,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 34 [2024-06-27 17:54:46,814 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 72 transitions, 618 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:46,814 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:54:46,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 34 [2024-06-27 17:54:46,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:54:46,964 INFO L124 PetriNetUnfolderBase]: 523/1211 cut-off events. [2024-06-27 17:54:46,964 INFO L125 PetriNetUnfolderBase]: For 5335/5335 co-relation queries the response was YES. [2024-06-27 17:54:46,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3420 conditions, 1211 events. 523/1211 cut-off events. For 5335/5335 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 8844 event pairs, 249 based on Foata normal form. 6/1152 useless extension candidates. Maximal degree in co-relation 3372. Up to 812 conditions per place. [2024-06-27 17:54:46,971 INFO L140 encePairwiseOnDemand]: 26/34 looper letters, 65 selfloop transitions, 17 changer transitions 0/93 dead transitions. [2024-06-27 17:54:46,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 93 transitions, 840 flow [2024-06-27 17:54:46,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:54:46,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:54:46,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 134 transitions. [2024-06-27 17:54:46,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6568627450980392 [2024-06-27 17:54:46,973 INFO L175 Difference]: Start difference. First operand has 113 places, 72 transitions, 618 flow. Second operand 6 states and 134 transitions. [2024-06-27 17:54:46,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 93 transitions, 840 flow [2024-06-27 17:54:46,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 93 transitions, 777 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-27 17:54:46,990 INFO L231 Difference]: Finished difference. Result has 113 places, 72 transitions, 592 flow [2024-06-27 17:54:46,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=555, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=592, PETRI_PLACES=113, PETRI_TRANSITIONS=72} [2024-06-27 17:54:46,991 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 77 predicate places. [2024-06-27 17:54:46,991 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 72 transitions, 592 flow [2024-06-27 17:54:46,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:46,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:54:46,991 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:54:46,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 17:54:46,992 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:54:46,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:54:46,992 INFO L85 PathProgramCache]: Analyzing trace with hash 280724861, now seen corresponding path program 3 times [2024-06-27 17:54:46,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:54:46,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834806284] [2024-06-27 17:54:46,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:54:46,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:54:46,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:54:47,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:54:47,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:54:47,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834806284] [2024-06-27 17:54:47,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834806284] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:54:47,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:54:47,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:54:47,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026628760] [2024-06-27 17:54:47,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:54:47,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:54:47,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:54:47,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:54:47,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:54:47,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 34 [2024-06-27 17:54:47,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 72 transitions, 592 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:47,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:54:47,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 34 [2024-06-27 17:54:47,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:54:47,298 INFO L124 PetriNetUnfolderBase]: 545/1265 cut-off events. [2024-06-27 17:54:47,298 INFO L125 PetriNetUnfolderBase]: For 5255/5255 co-relation queries the response was YES. [2024-06-27 17:54:47,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3521 conditions, 1265 events. 545/1265 cut-off events. For 5255/5255 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 9391 event pairs, 305 based on Foata normal form. 6/1204 useless extension candidates. Maximal degree in co-relation 3473. Up to 600 conditions per place. [2024-06-27 17:54:47,306 INFO L140 encePairwiseOnDemand]: 26/34 looper letters, 54 selfloop transitions, 34 changer transitions 0/99 dead transitions. [2024-06-27 17:54:47,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 99 transitions, 840 flow [2024-06-27 17:54:47,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:54:47,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:54:47,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 188 transitions. [2024-06-27 17:54:47,307 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6143790849673203 [2024-06-27 17:54:47,307 INFO L175 Difference]: Start difference. First operand has 113 places, 72 transitions, 592 flow. Second operand 9 states and 188 transitions. [2024-06-27 17:54:47,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 99 transitions, 840 flow [2024-06-27 17:54:47,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 99 transitions, 807 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-27 17:54:47,323 INFO L231 Difference]: Finished difference. Result has 118 places, 72 transitions, 631 flow [2024-06-27 17:54:47,323 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=559, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=631, PETRI_PLACES=118, PETRI_TRANSITIONS=72} [2024-06-27 17:54:47,323 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 82 predicate places. [2024-06-27 17:54:47,323 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 72 transitions, 631 flow [2024-06-27 17:54:47,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:47,324 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:54:47,324 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:54:47,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 17:54:47,324 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:54:47,324 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:54:47,324 INFO L85 PathProgramCache]: Analyzing trace with hash 482073581, now seen corresponding path program 4 times [2024-06-27 17:54:47,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:54:47,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561647422] [2024-06-27 17:54:47,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:54:47,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:54:47,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:54:47,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:54:47,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:54:47,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561647422] [2024-06-27 17:54:47,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561647422] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:54:47,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:54:47,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:54:47,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698705604] [2024-06-27 17:54:47,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:54:47,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:54:47,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:54:47,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:54:47,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:54:47,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 34 [2024-06-27 17:54:47,483 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 72 transitions, 631 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:47,483 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:54:47,483 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 34 [2024-06-27 17:54:47,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:54:47,625 INFO L124 PetriNetUnfolderBase]: 538/1300 cut-off events. [2024-06-27 17:54:47,625 INFO L125 PetriNetUnfolderBase]: For 3481/3481 co-relation queries the response was YES. [2024-06-27 17:54:47,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3423 conditions, 1300 events. 538/1300 cut-off events. For 3481/3481 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 9691 event pairs, 278 based on Foata normal form. 6/1242 useless extension candidates. Maximal degree in co-relation 3374. Up to 761 conditions per place. [2024-06-27 17:54:47,633 INFO L140 encePairwiseOnDemand]: 26/34 looper letters, 67 selfloop transitions, 18 changer transitions 0/96 dead transitions. [2024-06-27 17:54:47,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 96 transitions, 811 flow [2024-06-27 17:54:47,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:54:47,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:54:47,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 152 transitions. [2024-06-27 17:54:47,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6386554621848739 [2024-06-27 17:54:47,634 INFO L175 Difference]: Start difference. First operand has 118 places, 72 transitions, 631 flow. Second operand 7 states and 152 transitions. [2024-06-27 17:54:47,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 96 transitions, 811 flow [2024-06-27 17:54:47,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 96 transitions, 634 flow, removed 5 selfloop flow, removed 33 redundant places. [2024-06-27 17:54:47,640 INFO L231 Difference]: Finished difference. Result has 90 places, 71 transitions, 440 flow [2024-06-27 17:54:47,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=404, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=440, PETRI_PLACES=90, PETRI_TRANSITIONS=71} [2024-06-27 17:54:47,641 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 54 predicate places. [2024-06-27 17:54:47,641 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 71 transitions, 440 flow [2024-06-27 17:54:47,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:47,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:54:47,641 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] [2024-06-27 17:54:47,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 17:54:47,641 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:54:47,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:54:47,642 INFO L85 PathProgramCache]: Analyzing trace with hash -1028860069, now seen corresponding path program 1 times [2024-06-27 17:54:47,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:54:47,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635242703] [2024-06-27 17:54:47,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:54:47,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:54:47,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:54:47,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:54:47,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:54:47,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635242703] [2024-06-27 17:54:47,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635242703] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:54:47,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:54:47,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:54:47,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86337127] [2024-06-27 17:54:47,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:54:47,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:54:47,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:54:47,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:54:47,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:54:47,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 34 [2024-06-27 17:54:47,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 71 transitions, 440 flow. Second operand has 5 states, 5 states have (on average 21.0) internal successors, (105), 5 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:47,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:54:47,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 34 [2024-06-27 17:54:47,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:54:47,793 INFO L124 PetriNetUnfolderBase]: 410/1172 cut-off events. [2024-06-27 17:54:47,793 INFO L125 PetriNetUnfolderBase]: For 388/389 co-relation queries the response was YES. [2024-06-27 17:54:47,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2502 conditions, 1172 events. 410/1172 cut-off events. For 388/389 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 8588 event pairs, 20 based on Foata normal form. 97/1224 useless extension candidates. Maximal degree in co-relation 2479. Up to 344 conditions per place. [2024-06-27 17:54:47,797 INFO L140 encePairwiseOnDemand]: 29/34 looper letters, 18 selfloop transitions, 24 changer transitions 1/81 dead transitions. [2024-06-27 17:54:47,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 81 transitions, 549 flow [2024-06-27 17:54:47,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:54:47,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:54:47,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 122 transitions. [2024-06-27 17:54:47,798 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7176470588235294 [2024-06-27 17:54:47,799 INFO L175 Difference]: Start difference. First operand has 90 places, 71 transitions, 440 flow. Second operand 5 states and 122 transitions. [2024-06-27 17:54:47,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 81 transitions, 549 flow [2024-06-27 17:54:47,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 81 transitions, 512 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-27 17:54:47,801 INFO L231 Difference]: Finished difference. Result has 91 places, 71 transitions, 480 flow [2024-06-27 17:54:47,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=403, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=480, PETRI_PLACES=91, PETRI_TRANSITIONS=71} [2024-06-27 17:54:47,801 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 55 predicate places. [2024-06-27 17:54:47,801 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 71 transitions, 480 flow [2024-06-27 17:54:47,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.0) internal successors, (105), 5 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:47,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:54:47,802 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] [2024-06-27 17:54:47,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 17:54:47,802 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:54:47,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:54:47,802 INFO L85 PathProgramCache]: Analyzing trace with hash -974379961, now seen corresponding path program 1 times [2024-06-27 17:54:47,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:54:47,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378357225] [2024-06-27 17:54:47,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:54:47,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:54:47,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:54:47,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:54:47,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:54:47,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378357225] [2024-06-27 17:54:47,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378357225] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:54:47,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:54:47,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:54:47,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225083366] [2024-06-27 17:54:47,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:54:47,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:54:47,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:54:47,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:54:47,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:54:47,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 34 [2024-06-27 17:54:47,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 71 transitions, 480 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:47,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:54:47,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 34 [2024-06-27 17:54:47,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:54:47,979 INFO L124 PetriNetUnfolderBase]: 310/841 cut-off events. [2024-06-27 17:54:47,980 INFO L125 PetriNetUnfolderBase]: For 555/555 co-relation queries the response was YES. [2024-06-27 17:54:47,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2198 conditions, 841 events. 310/841 cut-off events. For 555/555 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 5563 event pairs, 112 based on Foata normal form. 44/805 useless extension candidates. Maximal degree in co-relation 2173. Up to 277 conditions per place. [2024-06-27 17:54:47,982 INFO L140 encePairwiseOnDemand]: 27/34 looper letters, 15 selfloop transitions, 4 changer transitions 50/87 dead transitions. [2024-06-27 17:54:47,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 87 transitions, 610 flow [2024-06-27 17:54:47,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:54:47,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:54:47,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 154 transitions. [2024-06-27 17:54:47,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6470588235294118 [2024-06-27 17:54:47,984 INFO L175 Difference]: Start difference. First operand has 91 places, 71 transitions, 480 flow. Second operand 7 states and 154 transitions. [2024-06-27 17:54:47,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 87 transitions, 610 flow [2024-06-27 17:54:47,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 87 transitions, 508 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-27 17:54:47,987 INFO L231 Difference]: Finished difference. Result has 94 places, 34 transitions, 132 flow [2024-06-27 17:54:47,987 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=382, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=132, PETRI_PLACES=94, PETRI_TRANSITIONS=34} [2024-06-27 17:54:47,987 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 58 predicate places. [2024-06-27 17:54:47,988 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 34 transitions, 132 flow [2024-06-27 17:54:47,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:47,988 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:54:47,988 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] [2024-06-27 17:54:47,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 17:54:47,988 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:54:47,989 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:54:47,989 INFO L85 PathProgramCache]: Analyzing trace with hash -957184815, now seen corresponding path program 2 times [2024-06-27 17:54:47,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:54:47,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373753759] [2024-06-27 17:54:47,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:54:47,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:54:47,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:54:48,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:54:48,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:54:48,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373753759] [2024-06-27 17:54:48,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373753759] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:54:48,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:54:48,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:54:48,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239858286] [2024-06-27 17:54:48,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:54:48,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:54:48,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:54:48,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:54:48,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:54:48,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 34 [2024-06-27 17:54:48,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 34 transitions, 132 flow. Second operand has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:48,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:54:48,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 34 [2024-06-27 17:54:48,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:54:48,167 INFO L124 PetriNetUnfolderBase]: 64/185 cut-off events. [2024-06-27 17:54:48,167 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2024-06-27 17:54:48,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 419 conditions, 185 events. 64/185 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 731 event pairs, 13 based on Foata normal form. 12/177 useless extension candidates. Maximal degree in co-relation 405. Up to 73 conditions per place. [2024-06-27 17:54:48,168 INFO L140 encePairwiseOnDemand]: 29/34 looper letters, 0 selfloop transitions, 0 changer transitions 38/38 dead transitions. [2024-06-27 17:54:48,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 38 transitions, 180 flow [2024-06-27 17:54:48,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:54:48,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:54:48,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 128 transitions. [2024-06-27 17:54:48,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6274509803921569 [2024-06-27 17:54:48,169 INFO L175 Difference]: Start difference. First operand has 94 places, 34 transitions, 132 flow. Second operand 6 states and 128 transitions. [2024-06-27 17:54:48,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 38 transitions, 180 flow [2024-06-27 17:54:48,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 38 transitions, 155 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-27 17:54:48,170 INFO L231 Difference]: Finished difference. Result has 52 places, 0 transitions, 0 flow [2024-06-27 17:54:48,170 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=0, PETRI_PLACES=52, PETRI_TRANSITIONS=0} [2024-06-27 17:54:48,170 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 16 predicate places. [2024-06-27 17:54:48,171 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 0 transitions, 0 flow [2024-06-27 17:54:48,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:48,173 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 5 remaining) [2024-06-27 17:54:48,173 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 5 remaining) [2024-06-27 17:54:48,174 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2024-06-27 17:54:48,174 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 5 remaining) [2024-06-27 17:54:48,174 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 5 remaining) [2024-06-27 17:54:48,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 17:54:48,174 INFO L445 BasicCegarLoop]: Path program histogram: [10, 6, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:54:48,178 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-06-27 17:54:48,178 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-06-27 17:54:48,181 INFO L507 ceAbstractionStarter]: Automizer considered 2 witness invariants [2024-06-27 17:54:48,182 INFO L508 ceAbstractionStarter]: WitnessConsidered=2 [2024-06-27 17:54:48,182 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.06 05:54:48 BasicIcfg [2024-06-27 17:54:48,183 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-06-27 17:54:48,183 INFO L158 Benchmark]: Toolchain (without parser) took 11066.50ms. Allocated memory was 195.0MB in the beginning and 400.6MB in the end (delta: 205.5MB). Free memory was 122.8MB in the beginning and 338.8MB in the end (delta: -216.0MB). There was no memory consumed. Max. memory is 16.1GB. [2024-06-27 17:54:48,183 INFO L158 Benchmark]: Witness Parser took 0.15ms. Allocated memory is still 113.2MB. Free memory was 75.7MB in the beginning and 75.6MB in the end (delta: 159.5kB). There was no memory consumed. Max. memory is 16.1GB. [2024-06-27 17:54:48,184 INFO L158 Benchmark]: CDTParser took 0.07ms. Allocated memory is still 195.0MB. Free memory is still 169.0MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-27 17:54:48,184 INFO L158 Benchmark]: CACSL2BoogieTranslator took 449.16ms. Allocated memory is still 195.0MB. Free memory was 122.5MB in the beginning and 96.5MB in the end (delta: 25.9MB). Peak memory consumption was 27.3MB. Max. memory is 16.1GB. [2024-06-27 17:54:48,184 INFO L158 Benchmark]: Boogie Procedure Inliner took 52.95ms. Allocated memory is still 195.0MB. Free memory was 96.5MB in the beginning and 94.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-27 17:54:48,184 INFO L158 Benchmark]: Boogie Preprocessor took 30.60ms. Allocated memory is still 195.0MB. Free memory was 94.4MB in the beginning and 92.7MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-27 17:54:48,185 INFO L158 Benchmark]: RCFGBuilder took 322.85ms. Allocated memory is still 195.0MB. Free memory was 92.3MB in the beginning and 150.3MB in the end (delta: -57.9MB). Peak memory consumption was 8.8MB. Max. memory is 16.1GB. [2024-06-27 17:54:48,185 INFO L158 Benchmark]: TraceAbstraction took 10203.81ms. Allocated memory was 195.0MB in the beginning and 400.6MB in the end (delta: 205.5MB). Free memory was 149.2MB in the beginning and 338.8MB in the end (delta: -189.6MB). Peak memory consumption was 17.0MB. Max. memory is 16.1GB. [2024-06-27 17:54:48,186 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 113.2MB. Free memory was 75.7MB in the beginning and 75.6MB in the end (delta: 159.5kB). There was no memory consumed. Max. memory is 16.1GB. * CDTParser took 0.07ms. Allocated memory is still 195.0MB. Free memory is still 169.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 449.16ms. Allocated memory is still 195.0MB. Free memory was 122.5MB in the beginning and 96.5MB in the end (delta: 25.9MB). Peak memory consumption was 27.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 52.95ms. Allocated memory is still 195.0MB. Free memory was 96.5MB in the beginning and 94.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 30.60ms. Allocated memory is still 195.0MB. Free memory was 94.4MB in the beginning and 92.7MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 322.85ms. Allocated memory is still 195.0MB. Free memory was 92.3MB in the beginning and 150.3MB in the end (delta: -57.9MB). Peak memory consumption was 8.8MB. Max. memory is 16.1GB. * TraceAbstraction took 10203.81ms. Allocated memory was 195.0MB in the beginning and 400.6MB in the end (delta: 205.5MB). Free memory was 149.2MB in the beginning and 338.8MB in the end (delta: -189.6MB). Peak memory consumption was 17.0MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 763]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 764]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 18]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 50 locations, 5 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: 10.1s, OverallIterations: 43, TraceHistogramMax: 1, PathProgramHistogramMax: 10, EmptinessCheckTime: 0.0s, AutomataDifference: 6.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2298 SdHoareTripleChecker+Valid, 3.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1857 mSDsluCounter, 410 SdHoareTripleChecker+Invalid, 2.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 255 mSDsCounter, 224 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 7499 IncrementalHoareTripleChecker+Invalid, 7723 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 224 mSolverCounterUnsat, 155 mSDtfsCounter, 7499 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 257 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 251 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 1.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=631occurred in iteration=39, InterpolantAutomatonStates: 280, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 3.4s InterpolantComputationTime, 634 NumberOfCodeBlocks, 634 NumberOfCodeBlocksAsserted, 43 NumberOfCheckSat, 591 ConstructedInterpolants, 0 QuantifiedInterpolants, 5287 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 43 InterpolantComputations, 43 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 3 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-06-27 17:54:48,208 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE