./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe025_pso.oepc_pso.opt_tso.oepc_tso.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-06-19_11-23-25.files/protection/safe025_pso.oepc_pso.opt_tso.oepc_tso.opt.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/safe025_pso.oepc_pso.opt_tso.oepc_tso.opt.i ./goblint.2024-06-19_11-23-25.files/protection/safe025_pso.oepc_pso.opt_tso.oepc_tso.opt.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 17:54:55,279 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 17:54:55,361 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 17:54:55,366 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 17:54:55,367 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 17:54:55,398 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 17:54:55,400 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 17:54:55,400 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 17:54:55,401 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 17:54:55,405 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 17:54:55,405 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 17:54:55,405 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 17:54:55,406 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 17:54:55,407 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 17:54:55,407 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 17:54:55,408 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 17:54:55,408 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 17:54:55,408 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 17:54:55,408 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 17:54:55,409 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 17:54:55,409 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 17:54:55,409 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 17:54:55,410 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 17:54:55,410 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 17:54:55,410 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 17:54:55,410 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 17:54:55,411 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 17:54:55,411 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 17:54:55,411 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 17:54:55,412 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 17:54:55,413 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 17:54:55,413 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 17:54:55,413 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 17:54:55,413 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 17:54:55,413 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 17:54:55,414 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 17:54:55,414 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 17:54:55,414 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 17:54:55,414 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 17:54:55,414 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 17:54:55,415 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 17:54:55,415 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 17:54:55,415 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 17:54:55,415 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-06-27 17:54:55,727 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 17:54:55,756 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 17:54:55,758 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 17:54:55,759 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 17:54:55,761 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 17:54:55,763 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/safe025_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml [2024-06-27 17:54:55,898 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 17:54:55,898 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 17:54:55,900 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe025_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-27 17:54:57,162 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 17:54:57,473 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 17:54:57,474 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe025_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-27 17:54:57,491 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f6417ca2e/9e0e32ae583f4a1383ce1783b323ab5d/FLAG4e43dc145 [2024-06-27 17:54:57,506 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f6417ca2e/9e0e32ae583f4a1383ce1783b323ab5d [2024-06-27 17:54:57,506 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 17:54:57,507 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 17:54:57,511 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 17:54:57,512 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 17:54:57,516 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 17:54:57,517 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 05:54:55" (1/2) ... [2024-06-27 17:54:57,518 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c2af6fd and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:54:57, skipping insertion in model container [2024-06-27 17:54:57,518 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 05:54:55" (1/2) ... [2024-06-27 17:54:57,519 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1ab294a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:54:57, skipping insertion in model container [2024-06-27 17:54:57,520 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 05:54:57" (2/2) ... [2024-06-27 17:54:57,520 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c2af6fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:54:57, skipping insertion in model container [2024-06-27 17:54:57,520 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 05:54:57" (2/2) ... [2024-06-27 17:54:57,521 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 17:54:57,563 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 17:54:57,564 INFO L97 edCorrectnessWitness]: Location invariant before [L783-L783] (((((! multithreaded || (y == 0 || y == 1)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) [2024-06-27 17:54:57,564 INFO L97 edCorrectnessWitness]: Location invariant before [L786-L786] (((((! multithreaded || (y == 0 || y == 1)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) [2024-06-27 17:54:57,565 INFO L97 edCorrectnessWitness]: Location invariant before [L785-L785] (((((! multithreaded || (y == 0 || y == 1)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) [2024-06-27 17:54:57,565 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 17:54:57,565 INFO L106 edCorrectnessWitness]: ghost_update [L781-L781] multithreaded = 1; [2024-06-27 17:54:57,611 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 17:54:57,760 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/safe025_pso.oepc_pso.opt_tso.oepc_tso.opt.i[975,988] [2024-06-27 17:54:57,933 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 17:54:57,944 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local [2024-06-27 17:54:57,987 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/safe025_pso.oepc_pso.opt_tso.oepc_tso.opt.i[975,988] Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 17:54:58,045 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 17:54:58,107 INFO L206 MainTranslator]: Completed translation [2024-06-27 17:54:58,108 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:54:58 WrapperNode [2024-06-27 17:54:58,108 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 17:54:58,109 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 17:54:58,109 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 17:54:58,109 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 17:54:58,115 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:54:58" (1/1) ... [2024-06-27 17:54:58,145 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:54:58" (1/1) ... [2024-06-27 17:54:58,167 INFO L138 Inliner]: procedures = 175, calls = 43, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 64 [2024-06-27 17:54:58,167 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 17:54:58,168 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 17:54:58,168 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 17:54:58,168 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 17:54:58,180 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:54:58" (1/1) ... [2024-06-27 17:54:58,180 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:54:58" (1/1) ... [2024-06-27 17:54:58,183 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:54:58" (1/1) ... [2024-06-27 17:54:58,196 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 17:54:58,197 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:54:58" (1/1) ... [2024-06-27 17:54:58,197 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:54:58" (1/1) ... [2024-06-27 17:54:58,208 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:54:58" (1/1) ... [2024-06-27 17:54:58,216 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:54:58" (1/1) ... [2024-06-27 17:54:58,218 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:54:58" (1/1) ... [2024-06-27 17:54:58,219 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:54:58" (1/1) ... [2024-06-27 17:54:58,221 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 17:54:58,222 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 17:54:58,222 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 17:54:58,222 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 17:54:58,223 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:54:58" (1/1) ... [2024-06-27 17:54:58,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 17:54:58,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:54:58,250 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 17:54:58,252 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 17:54:58,278 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 17:54:58,278 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 17:54:58,278 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 17:54:58,279 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 17:54:58,279 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 17:54:58,279 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 17:54:58,279 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 17:54:58,279 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 17:54:58,279 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 17:54:58,280 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 17:54:58,280 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 17:54:58,280 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 17:54:58,281 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 17:54:58,386 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 17:54:58,388 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 17:54:58,555 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 17:54:58,556 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 17:54:58,671 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 17:54:58,672 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 17:54:58,673 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 05:54:58 BoogieIcfgContainer [2024-06-27 17:54:58,673 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 17:54:58,675 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 17:54:58,675 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 17:54:58,678 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 17:54:58,678 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 05:54:55" (1/4) ... [2024-06-27 17:54:58,678 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@685e538f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 05:54:58, skipping insertion in model container [2024-06-27 17:54:58,679 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 05:54:57" (2/4) ... [2024-06-27 17:54:58,679 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@685e538f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 05:54:58, skipping insertion in model container [2024-06-27 17:54:58,679 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:54:58" (3/4) ... [2024-06-27 17:54:58,679 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@685e538f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 05:54:58, skipping insertion in model container [2024-06-27 17:54:58,680 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 05:54:58" (4/4) ... [2024-06-27 17:54:58,681 INFO L112 eAbstractionObserver]: Analyzing ICFG safe025_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-27 17:54:58,696 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 17:54:58,697 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-27 17:54:58,697 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 17:54:58,761 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 17:54:58,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 55 places, 46 transitions, 104 flow [2024-06-27 17:54:58,824 INFO L124 PetriNetUnfolderBase]: 1/43 cut-off events. [2024-06-27 17:54:58,825 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 17:54:58,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53 conditions, 43 events. 1/43 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 70 event pairs, 0 based on Foata normal form. 0/38 useless extension candidates. Maximal degree in co-relation 44. Up to 2 conditions per place. [2024-06-27 17:54:58,828 INFO L82 GeneralOperation]: Start removeDead. Operand has 55 places, 46 transitions, 104 flow [2024-06-27 17:54:58,831 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 50 places, 40 transitions, 89 flow [2024-06-27 17:54:58,839 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 17:54:58,845 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;@491273f0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 17:54:58,845 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-06-27 17:54:58,849 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 17:54:58,849 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 17:54:58,849 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 17:54:58,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:54:58,850 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 17:54:58,850 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:54:58,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:54:58,855 INFO L85 PathProgramCache]: Analyzing trace with hash 209466946, now seen corresponding path program 1 times [2024-06-27 17:54:58,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:54:58,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072116892] [2024-06-27 17:54:58,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:54:58,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:54:58,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:54:59,215 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 17:54:59,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:54:59,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072116892] [2024-06-27 17:54:59,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072116892] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:54:59,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:54:59,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 17:54:59,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754081323] [2024-06-27 17:54:59,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:54:59,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 17:54:59,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:54:59,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 17:54:59,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 17:54:59,328 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 46 [2024-06-27 17:54:59,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 40 transitions, 89 flow. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states 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 17:54:59,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:54:59,334 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 46 [2024-06-27 17:54:59,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:54:59,595 INFO L124 PetriNetUnfolderBase]: 736/1198 cut-off events. [2024-06-27 17:54:59,596 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2024-06-27 17:54:59,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2383 conditions, 1198 events. 736/1198 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 6189 event pairs, 397 based on Foata normal form. 1/1145 useless extension candidates. Maximal degree in co-relation 2371. Up to 1120 conditions per place. [2024-06-27 17:54:59,611 INFO L140 encePairwiseOnDemand]: 39/46 looper letters, 31 selfloop transitions, 4 changer transitions 0/52 dead transitions. [2024-06-27 17:54:59,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 52 transitions, 189 flow [2024-06-27 17:54:59,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 17:54:59,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 17:54:59,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 101 transitions. [2024-06-27 17:54:59,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7318840579710145 [2024-06-27 17:54:59,625 INFO L175 Difference]: Start difference. First operand has 50 places, 40 transitions, 89 flow. Second operand 3 states and 101 transitions. [2024-06-27 17:54:59,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 52 transitions, 189 flow [2024-06-27 17:54:59,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 52 transitions, 184 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 17:54:59,633 INFO L231 Difference]: Finished difference. Result has 50 places, 43 transitions, 116 flow [2024-06-27 17:54:59,635 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=116, PETRI_PLACES=50, PETRI_TRANSITIONS=43} [2024-06-27 17:54:59,638 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 0 predicate places. [2024-06-27 17:54:59,639 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 43 transitions, 116 flow [2024-06-27 17:54:59,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states 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 17:54:59,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:54:59,640 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:54:59,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 17:54:59,640 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:54:59,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:54:59,644 INFO L85 PathProgramCache]: Analyzing trace with hash -564969073, now seen corresponding path program 1 times [2024-06-27 17:54:59,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:54:59,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610829380] [2024-06-27 17:54:59,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:54:59,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:54:59,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:54:59,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:54:59,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:54:59,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610829380] [2024-06-27 17:54:59,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610829380] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:54:59,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:54:59,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 17:54:59,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047738880] [2024-06-27 17:54:59,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:54:59,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 17:54:59,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:54:59,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 17:54:59,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 17:54:59,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 46 [2024-06-27 17:54:59,824 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 116 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 17:54:59,824 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:54:59,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 46 [2024-06-27 17:54:59,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:00,091 INFO L124 PetriNetUnfolderBase]: 962/1599 cut-off events. [2024-06-27 17:55:00,092 INFO L125 PetriNetUnfolderBase]: For 317/355 co-relation queries the response was YES. [2024-06-27 17:55:00,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3542 conditions, 1599 events. 962/1599 cut-off events. For 317/355 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 8932 event pairs, 491 based on Foata normal form. 3/1571 useless extension candidates. Maximal degree in co-relation 3530. Up to 1423 conditions per place. [2024-06-27 17:55:00,101 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 44 selfloop transitions, 7 changer transitions 0/67 dead transitions. [2024-06-27 17:55:00,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 67 transitions, 282 flow [2024-06-27 17:55:00,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 17:55:00,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 17:55:00,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 131 transitions. [2024-06-27 17:55:00,104 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7119565217391305 [2024-06-27 17:55:00,104 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 116 flow. Second operand 4 states and 131 transitions. [2024-06-27 17:55:00,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 67 transitions, 282 flow [2024-06-27 17:55:00,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 67 transitions, 276 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 17:55:00,106 INFO L231 Difference]: Finished difference. Result has 54 places, 49 transitions, 168 flow [2024-06-27 17:55:00,106 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=168, PETRI_PLACES=54, PETRI_TRANSITIONS=49} [2024-06-27 17:55:00,107 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 4 predicate places. [2024-06-27 17:55:00,107 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 49 transitions, 168 flow [2024-06-27 17:55:00,107 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 17:55:00,108 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:00,108 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:00,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 17:55:00,108 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:55:00,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:00,109 INFO L85 PathProgramCache]: Analyzing trace with hash 88934826, now seen corresponding path program 1 times [2024-06-27 17:55:00,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:00,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725255531] [2024-06-27 17:55:00,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:00,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:00,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:00,242 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 17:55:00,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:00,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725255531] [2024-06-27 17:55:00,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725255531] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:00,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:00,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 17:55:00,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605870719] [2024-06-27 17:55:00,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:00,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 17:55:00,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:00,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 17:55:00,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 17:55:00,270 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 46 [2024-06-27 17:55:00,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 49 transitions, 168 flow. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states 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 17:55:00,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:00,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 46 [2024-06-27 17:55:00,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:00,463 INFO L124 PetriNetUnfolderBase]: 1273/2072 cut-off events. [2024-06-27 17:55:00,463 INFO L125 PetriNetUnfolderBase]: For 941/975 co-relation queries the response was YES. [2024-06-27 17:55:00,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5074 conditions, 2072 events. 1273/2072 cut-off events. For 941/975 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 11907 event pairs, 617 based on Foata normal form. 2/2031 useless extension candidates. Maximal degree in co-relation 5059. Up to 1862 conditions per place. [2024-06-27 17:55:00,504 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 48 selfloop transitions, 9 changer transitions 0/74 dead transitions. [2024-06-27 17:55:00,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 74 transitions, 361 flow [2024-06-27 17:55:00,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 17:55:00,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 17:55:00,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 127 transitions. [2024-06-27 17:55:00,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6902173913043478 [2024-06-27 17:55:00,506 INFO L175 Difference]: Start difference. First operand has 54 places, 49 transitions, 168 flow. Second operand 4 states and 127 transitions. [2024-06-27 17:55:00,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 74 transitions, 361 flow [2024-06-27 17:55:00,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 74 transitions, 359 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-27 17:55:00,510 INFO L231 Difference]: Finished difference. Result has 59 places, 57 transitions, 242 flow [2024-06-27 17:55:00,510 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=242, PETRI_PLACES=59, PETRI_TRANSITIONS=57} [2024-06-27 17:55:00,510 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 9 predicate places. [2024-06-27 17:55:00,511 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 57 transitions, 242 flow [2024-06-27 17:55:00,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states 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 17:55:00,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:00,511 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:00,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 17:55:00,512 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:55:00,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:00,512 INFO L85 PathProgramCache]: Analyzing trace with hash 544407007, now seen corresponding path program 1 times [2024-06-27 17:55:00,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:00,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498235967] [2024-06-27 17:55:00,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:00,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:00,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:00,672 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 17:55:00,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:00,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498235967] [2024-06-27 17:55:00,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498235967] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:00,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:00,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:55:00,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258532569] [2024-06-27 17:55:00,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:00,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:55:00,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:00,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:55:00,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:55:00,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 46 [2024-06-27 17:55:00,738 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 57 transitions, 242 flow. Second operand has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:00,738 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:00,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 46 [2024-06-27 17:55:00,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:01,045 INFO L124 PetriNetUnfolderBase]: 1468/2462 cut-off events. [2024-06-27 17:55:01,045 INFO L125 PetriNetUnfolderBase]: For 2022/2033 co-relation queries the response was YES. [2024-06-27 17:55:01,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6542 conditions, 2462 events. 1468/2462 cut-off events. For 2022/2033 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 14515 event pairs, 501 based on Foata normal form. 12/2447 useless extension candidates. Maximal degree in co-relation 6523. Up to 2065 conditions per place. [2024-06-27 17:55:01,067 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 64 selfloop transitions, 14 changer transitions 0/95 dead transitions. [2024-06-27 17:55:01,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 95 transitions, 496 flow [2024-06-27 17:55:01,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:55:01,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:55:01,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 186 transitions. [2024-06-27 17:55:01,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6739130434782609 [2024-06-27 17:55:01,073 INFO L175 Difference]: Start difference. First operand has 59 places, 57 transitions, 242 flow. Second operand 6 states and 186 transitions. [2024-06-27 17:55:01,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 95 transitions, 496 flow [2024-06-27 17:55:01,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 95 transitions, 494 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-27 17:55:01,081 INFO L231 Difference]: Finished difference. Result has 65 places, 61 transitions, 302 flow [2024-06-27 17:55:01,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=302, PETRI_PLACES=65, PETRI_TRANSITIONS=61} [2024-06-27 17:55:01,083 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 15 predicate places. [2024-06-27 17:55:01,083 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 61 transitions, 302 flow [2024-06-27 17:55:01,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:01,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:01,084 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:01,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 17:55:01,084 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:55:01,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:01,085 INFO L85 PathProgramCache]: Analyzing trace with hash -1537986945, now seen corresponding path program 1 times [2024-06-27 17:55:01,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:01,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988582169] [2024-06-27 17:55:01,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:01,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:01,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:01,241 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 17:55:01,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:01,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988582169] [2024-06-27 17:55:01,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988582169] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:01,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:01,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 17:55:01,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590989168] [2024-06-27 17:55:01,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:01,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 17:55:01,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:01,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 17:55:01,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 17:55:01,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 46 [2024-06-27 17:55:01,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 61 transitions, 302 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 17:55:01,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:01,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 46 [2024-06-27 17:55:01,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:01,483 INFO L124 PetriNetUnfolderBase]: 1285/2131 cut-off events. [2024-06-27 17:55:01,483 INFO L125 PetriNetUnfolderBase]: For 2926/2933 co-relation queries the response was YES. [2024-06-27 17:55:01,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6367 conditions, 2131 events. 1285/2131 cut-off events. For 2926/2933 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 12369 event pairs, 459 based on Foata normal form. 4/2102 useless extension candidates. Maximal degree in co-relation 6344. Up to 1850 conditions per place. [2024-06-27 17:55:01,500 INFO L140 encePairwiseOnDemand]: 39/46 looper letters, 49 selfloop transitions, 9 changer transitions 0/77 dead transitions. [2024-06-27 17:55:01,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 77 transitions, 459 flow [2024-06-27 17:55:01,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 17:55:01,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 17:55:01,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 124 transitions. [2024-06-27 17:55:01,502 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6739130434782609 [2024-06-27 17:55:01,502 INFO L175 Difference]: Start difference. First operand has 65 places, 61 transitions, 302 flow. Second operand 4 states and 124 transitions. [2024-06-27 17:55:01,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 77 transitions, 459 flow [2024-06-27 17:55:01,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 77 transitions, 430 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-27 17:55:01,507 INFO L231 Difference]: Finished difference. Result has 66 places, 62 transitions, 304 flow [2024-06-27 17:55:01,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=273, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=304, PETRI_PLACES=66, PETRI_TRANSITIONS=62} [2024-06-27 17:55:01,508 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 16 predicate places. [2024-06-27 17:55:01,508 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 62 transitions, 304 flow [2024-06-27 17:55:01,509 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 17:55:01,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:01,509 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:01,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 17:55:01,509 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:55:01,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:01,510 INFO L85 PathProgramCache]: Analyzing trace with hash -1888455135, now seen corresponding path program 1 times [2024-06-27 17:55:01,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:01,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146028641] [2024-06-27 17:55:01,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:01,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:01,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:01,616 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 17:55:01,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:01,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146028641] [2024-06-27 17:55:01,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146028641] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:01,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:01,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:55:01,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878331913] [2024-06-27 17:55:01,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:01,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:55:01,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:01,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:55:01,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:55:01,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:55:01,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 62 transitions, 304 flow. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states 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 17:55:01,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:01,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:55:01,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:01,902 INFO L124 PetriNetUnfolderBase]: 1515/2438 cut-off events. [2024-06-27 17:55:01,902 INFO L125 PetriNetUnfolderBase]: For 3501/3501 co-relation queries the response was YES. [2024-06-27 17:55:01,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7291 conditions, 2438 events. 1515/2438 cut-off events. For 3501/3501 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 13737 event pairs, 525 based on Foata normal form. 2/2429 useless extension candidates. Maximal degree in co-relation 7267. Up to 2129 conditions per place. [2024-06-27 17:55:01,924 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 67 selfloop transitions, 16 changer transitions 0/97 dead transitions. [2024-06-27 17:55:01,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 97 transitions, 591 flow [2024-06-27 17:55:01,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:55:01,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:55:01,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 156 transitions. [2024-06-27 17:55:01,926 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6782608695652174 [2024-06-27 17:55:01,926 INFO L175 Difference]: Start difference. First operand has 66 places, 62 transitions, 304 flow. Second operand 5 states and 156 transitions. [2024-06-27 17:55:01,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 97 transitions, 591 flow [2024-06-27 17:55:01,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 97 transitions, 581 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-06-27 17:55:01,935 INFO L231 Difference]: Finished difference. Result has 71 places, 70 transitions, 390 flow [2024-06-27 17:55:01,935 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=294, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=390, PETRI_PLACES=71, PETRI_TRANSITIONS=70} [2024-06-27 17:55:01,938 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 21 predicate places. [2024-06-27 17:55:01,938 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 70 transitions, 390 flow [2024-06-27 17:55:01,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states 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 17:55:01,939 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:01,939 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:01,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 17:55:01,939 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:55:01,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:01,940 INFO L85 PathProgramCache]: Analyzing trace with hash -408832481, now seen corresponding path program 2 times [2024-06-27 17:55:01,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:01,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7204449] [2024-06-27 17:55:01,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:01,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:01,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:02,074 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 17:55:02,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:02,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7204449] [2024-06-27 17:55:02,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7204449] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:02,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:02,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:55:02,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475547047] [2024-06-27 17:55:02,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:02,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:55:02,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:02,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:55:02,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:55:02,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:55:02,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 70 transitions, 390 flow. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states 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 17:55:02,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:02,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:55:02,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:02,345 INFO L124 PetriNetUnfolderBase]: 1510/2409 cut-off events. [2024-06-27 17:55:02,345 INFO L125 PetriNetUnfolderBase]: For 5152/5152 co-relation queries the response was YES. [2024-06-27 17:55:02,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7984 conditions, 2409 events. 1510/2409 cut-off events. For 5152/5152 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 13470 event pairs, 498 based on Foata normal form. 2/2398 useless extension candidates. Maximal degree in co-relation 7957. Up to 2126 conditions per place. [2024-06-27 17:55:02,369 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 63 selfloop transitions, 19 changer transitions 0/96 dead transitions. [2024-06-27 17:55:02,369 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 96 transitions, 652 flow [2024-06-27 17:55:02,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:55:02,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:55:02,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 152 transitions. [2024-06-27 17:55:02,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6608695652173913 [2024-06-27 17:55:02,371 INFO L175 Difference]: Start difference. First operand has 71 places, 70 transitions, 390 flow. Second operand 5 states and 152 transitions. [2024-06-27 17:55:02,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 96 transitions, 652 flow [2024-06-27 17:55:02,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 96 transitions, 632 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-06-27 17:55:02,381 INFO L231 Difference]: Finished difference. Result has 75 places, 73 transitions, 438 flow [2024-06-27 17:55:02,381 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=372, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=438, PETRI_PLACES=75, PETRI_TRANSITIONS=73} [2024-06-27 17:55:02,382 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 25 predicate places. [2024-06-27 17:55:02,383 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 73 transitions, 438 flow [2024-06-27 17:55:02,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states 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 17:55:02,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:02,383 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:02,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 17:55:02,384 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:55:02,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:02,384 INFO L85 PathProgramCache]: Analyzing trace with hash -925382174, now seen corresponding path program 1 times [2024-06-27 17:55:02,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:02,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791992995] [2024-06-27 17:55:02,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:02,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:02,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:02,505 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 17:55:02,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:02,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791992995] [2024-06-27 17:55:02,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791992995] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:02,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:02,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:55:02,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316164593] [2024-06-27 17:55:02,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:02,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:55:02,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:02,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:55:02,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:55:02,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:55:02,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 73 transitions, 438 flow. Second operand has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:02,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:02,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:55:02,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:02,798 INFO L124 PetriNetUnfolderBase]: 1527/2449 cut-off events. [2024-06-27 17:55:02,798 INFO L125 PetriNetUnfolderBase]: For 6369/6369 co-relation queries the response was YES. [2024-06-27 17:55:02,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8466 conditions, 2449 events. 1527/2449 cut-off events. For 6369/6369 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 13805 event pairs, 490 based on Foata normal form. 2/2445 useless extension candidates. Maximal degree in co-relation 8437. Up to 2144 conditions per place. [2024-06-27 17:55:02,816 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 67 selfloop transitions, 21 changer transitions 0/102 dead transitions. [2024-06-27 17:55:02,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 102 transitions, 727 flow [2024-06-27 17:55:02,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:55:02,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:55:02,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 156 transitions. [2024-06-27 17:55:02,818 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6782608695652174 [2024-06-27 17:55:02,818 INFO L175 Difference]: Start difference. First operand has 75 places, 73 transitions, 438 flow. Second operand 5 states and 156 transitions. [2024-06-27 17:55:02,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 102 transitions, 727 flow [2024-06-27 17:55:02,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 102 transitions, 697 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-27 17:55:02,832 INFO L231 Difference]: Finished difference. Result has 78 places, 76 transitions, 482 flow [2024-06-27 17:55:02,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=411, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=482, PETRI_PLACES=78, PETRI_TRANSITIONS=76} [2024-06-27 17:55:02,833 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 28 predicate places. [2024-06-27 17:55:02,833 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 76 transitions, 482 flow [2024-06-27 17:55:02,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:02,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:02,834 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:02,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 17:55:02,834 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:55:02,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:02,835 INFO L85 PathProgramCache]: Analyzing trace with hash 211362632, now seen corresponding path program 2 times [2024-06-27 17:55:02,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:02,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107687159] [2024-06-27 17:55:02,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:02,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:02,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:02,938 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 17:55:02,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:02,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107687159] [2024-06-27 17:55:02,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107687159] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:02,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:02,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:55:02,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004513024] [2024-06-27 17:55:02,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:02,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:55:02,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:02,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:55:02,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:55:02,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:55:02,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 76 transitions, 482 flow. Second operand has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:02,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:02,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:55:02,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:03,244 INFO L124 PetriNetUnfolderBase]: 1522/2526 cut-off events. [2024-06-27 17:55:03,245 INFO L125 PetriNetUnfolderBase]: For 7727/7733 co-relation queries the response was YES. [2024-06-27 17:55:03,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8654 conditions, 2526 events. 1522/2526 cut-off events. For 7727/7733 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 14726 event pairs, 725 based on Foata normal form. 6/2503 useless extension candidates. Maximal degree in co-relation 8623. Up to 2139 conditions per place. [2024-06-27 17:55:03,263 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 63 selfloop transitions, 21 changer transitions 0/98 dead transitions. [2024-06-27 17:55:03,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 98 transitions, 708 flow [2024-06-27 17:55:03,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:55:03,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:55:03,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 150 transitions. [2024-06-27 17:55:03,265 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6521739130434783 [2024-06-27 17:55:03,265 INFO L175 Difference]: Start difference. First operand has 78 places, 76 transitions, 482 flow. Second operand 5 states and 150 transitions. [2024-06-27 17:55:03,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 98 transitions, 708 flow [2024-06-27 17:55:03,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 98 transitions, 681 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-27 17:55:03,275 INFO L231 Difference]: Finished difference. Result has 81 places, 77 transitions, 513 flow [2024-06-27 17:55:03,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=456, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=513, PETRI_PLACES=81, PETRI_TRANSITIONS=77} [2024-06-27 17:55:03,276 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 31 predicate places. [2024-06-27 17:55:03,276 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 77 transitions, 513 flow [2024-06-27 17:55:03,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:03,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:03,277 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:03,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 17:55:03,277 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:55:03,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:03,278 INFO L85 PathProgramCache]: Analyzing trace with hash 211372552, now seen corresponding path program 1 times [2024-06-27 17:55:03,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:03,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759666618] [2024-06-27 17:55:03,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:03,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:03,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:03,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:55:03,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:03,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759666618] [2024-06-27 17:55:03,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759666618] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:03,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:03,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:55:03,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617607463] [2024-06-27 17:55:03,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:03,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:55:03,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:03,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:55:03,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:55:03,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 46 [2024-06-27 17:55:03,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 77 transitions, 513 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 17:55:03,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:03,411 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 46 [2024-06-27 17:55:03,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:03,689 INFO L124 PetriNetUnfolderBase]: 1336/2309 cut-off events. [2024-06-27 17:55:03,690 INFO L125 PetriNetUnfolderBase]: For 8785/8791 co-relation queries the response was YES. [2024-06-27 17:55:03,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8074 conditions, 2309 events. 1336/2309 cut-off events. For 8785/8791 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 13804 event pairs, 585 based on Foata normal form. 8/2271 useless extension candidates. Maximal degree in co-relation 8042. Up to 1897 conditions per place. [2024-06-27 17:55:03,707 INFO L140 encePairwiseOnDemand]: 39/46 looper letters, 71 selfloop transitions, 11 changer transitions 0/101 dead transitions. [2024-06-27 17:55:03,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 101 transitions, 741 flow [2024-06-27 17:55:03,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:55:03,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:55:03,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 152 transitions. [2024-06-27 17:55:03,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6608695652173913 [2024-06-27 17:55:03,709 INFO L175 Difference]: Start difference. First operand has 81 places, 77 transitions, 513 flow. Second operand 5 states and 152 transitions. [2024-06-27 17:55:03,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 101 transitions, 741 flow [2024-06-27 17:55:03,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 101 transitions, 713 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-27 17:55:03,720 INFO L231 Difference]: Finished difference. Result has 84 places, 79 transitions, 530 flow [2024-06-27 17:55:03,720 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=485, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=530, PETRI_PLACES=84, PETRI_TRANSITIONS=79} [2024-06-27 17:55:03,721 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 34 predicate places. [2024-06-27 17:55:03,721 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 79 transitions, 530 flow [2024-06-27 17:55:03,721 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 17:55:03,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:03,722 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:03,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 17:55:03,722 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:55:03,722 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:03,723 INFO L85 PathProgramCache]: Analyzing trace with hash 1961036800, now seen corresponding path program 1 times [2024-06-27 17:55:03,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:03,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194217210] [2024-06-27 17:55:03,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:03,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:03,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:03,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:55:03,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:03,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194217210] [2024-06-27 17:55:03,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194217210] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:03,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:03,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:55:03,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378188989] [2024-06-27 17:55:03,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:03,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:55:03,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:03,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:55:03,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:55:03,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:55:03,881 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 79 transitions, 530 flow. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states 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 17:55:03,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:03,881 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:55:03,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:04,204 INFO L124 PetriNetUnfolderBase]: 1578/2535 cut-off events. [2024-06-27 17:55:04,205 INFO L125 PetriNetUnfolderBase]: For 10261/10261 co-relation queries the response was YES. [2024-06-27 17:55:04,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9294 conditions, 2535 events. 1578/2535 cut-off events. For 10261/10261 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 14469 event pairs, 376 based on Foata normal form. 3/2537 useless extension candidates. Maximal degree in co-relation 9260. Up to 2210 conditions per place. [2024-06-27 17:55:04,225 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 93 selfloop transitions, 22 changer transitions 0/129 dead transitions. [2024-06-27 17:55:04,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 129 transitions, 956 flow [2024-06-27 17:55:04,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:55:04,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:55:04,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 214 transitions. [2024-06-27 17:55:04,228 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6645962732919255 [2024-06-27 17:55:04,228 INFO L175 Difference]: Start difference. First operand has 84 places, 79 transitions, 530 flow. Second operand 7 states and 214 transitions. [2024-06-27 17:55:04,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 129 transitions, 956 flow [2024-06-27 17:55:04,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 129 transitions, 929 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-27 17:55:04,241 INFO L231 Difference]: Finished difference. Result has 89 places, 87 transitions, 623 flow [2024-06-27 17:55:04,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=503, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=623, PETRI_PLACES=89, PETRI_TRANSITIONS=87} [2024-06-27 17:55:04,242 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 39 predicate places. [2024-06-27 17:55:04,242 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 87 transitions, 623 flow [2024-06-27 17:55:04,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states 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 17:55:04,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:04,243 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:04,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 17:55:04,243 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:55:04,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:04,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1950117886, now seen corresponding path program 2 times [2024-06-27 17:55:04,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:04,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776404735] [2024-06-27 17:55:04,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:04,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:04,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:04,368 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 17:55:04,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:04,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776404735] [2024-06-27 17:55:04,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776404735] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:04,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:04,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:55:04,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402746209] [2024-06-27 17:55:04,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:04,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:55:04,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:04,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:55:04,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:55:04,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:55:04,406 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 87 transitions, 623 flow. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states 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 17:55:04,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:04,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:55:04,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:04,688 INFO L124 PetriNetUnfolderBase]: 1595/2580 cut-off events. [2024-06-27 17:55:04,688 INFO L125 PetriNetUnfolderBase]: For 13214/13214 co-relation queries the response was YES. [2024-06-27 17:55:04,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10317 conditions, 2580 events. 1595/2580 cut-off events. For 13214/13214 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 14678 event pairs, 431 based on Foata normal form. 2/2576 useless extension candidates. Maximal degree in co-relation 10281. Up to 2127 conditions per place. [2024-06-27 17:55:04,767 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 86 selfloop transitions, 32 changer transitions 0/132 dead transitions. [2024-06-27 17:55:04,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 132 transitions, 1095 flow [2024-06-27 17:55:04,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:55:04,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:55:04,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 185 transitions. [2024-06-27 17:55:04,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6702898550724637 [2024-06-27 17:55:04,769 INFO L175 Difference]: Start difference. First operand has 89 places, 87 transitions, 623 flow. Second operand 6 states and 185 transitions. [2024-06-27 17:55:04,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 132 transitions, 1095 flow [2024-06-27 17:55:04,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 132 transitions, 1021 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-27 17:55:04,791 INFO L231 Difference]: Finished difference. Result has 93 places, 99 transitions, 776 flow [2024-06-27 17:55:04,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=565, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=776, PETRI_PLACES=93, PETRI_TRANSITIONS=99} [2024-06-27 17:55:04,792 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 43 predicate places. [2024-06-27 17:55:04,793 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 99 transitions, 776 flow [2024-06-27 17:55:04,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states 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 17:55:04,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:04,793 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:04,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 17:55:04,793 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:55:04,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:04,794 INFO L85 PathProgramCache]: Analyzing trace with hash -2045973378, now seen corresponding path program 3 times [2024-06-27 17:55:04,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:04,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155284337] [2024-06-27 17:55:04,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:04,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:04,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:04,901 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 17:55:04,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:04,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155284337] [2024-06-27 17:55:04,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155284337] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:04,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:04,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:55:04,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684612242] [2024-06-27 17:55:04,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:04,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:55:04,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:04,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:55:04,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:55:04,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:55:04,935 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 99 transitions, 776 flow. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states 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 17:55:04,935 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:04,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:55:04,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:05,216 INFO L124 PetriNetUnfolderBase]: 1590/2567 cut-off events. [2024-06-27 17:55:05,216 INFO L125 PetriNetUnfolderBase]: For 16411/16411 co-relation queries the response was YES. [2024-06-27 17:55:05,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10921 conditions, 2567 events. 1590/2567 cut-off events. For 16411/16411 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 14635 event pairs, 467 based on Foata normal form. 2/2548 useless extension candidates. Maximal degree in co-relation 10882. Up to 2124 conditions per place. [2024-06-27 17:55:05,238 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 81 selfloop transitions, 36 changer transitions 0/131 dead transitions. [2024-06-27 17:55:05,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 131 transitions, 1162 flow [2024-06-27 17:55:05,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:55:05,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:55:05,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 181 transitions. [2024-06-27 17:55:05,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6557971014492754 [2024-06-27 17:55:05,240 INFO L175 Difference]: Start difference. First operand has 93 places, 99 transitions, 776 flow. Second operand 6 states and 181 transitions. [2024-06-27 17:55:05,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 131 transitions, 1162 flow [2024-06-27 17:55:05,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 131 transitions, 1126 flow, removed 14 selfloop flow, removed 1 redundant places. [2024-06-27 17:55:05,270 INFO L231 Difference]: Finished difference. Result has 98 places, 102 transitions, 858 flow [2024-06-27 17:55:05,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=742, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=858, PETRI_PLACES=98, PETRI_TRANSITIONS=102} [2024-06-27 17:55:05,271 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 48 predicate places. [2024-06-27 17:55:05,272 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 102 transitions, 858 flow [2024-06-27 17:55:05,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states 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 17:55:05,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:05,272 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:05,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 17:55:05,273 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:55:05,273 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:05,273 INFO L85 PathProgramCache]: Analyzing trace with hash -1108761885, now seen corresponding path program 1 times [2024-06-27 17:55:05,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:05,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747718945] [2024-06-27 17:55:05,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:05,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:05,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:05,453 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 17:55:05,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:05,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747718945] [2024-06-27 17:55:05,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747718945] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:05,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:05,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:55:05,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901665582] [2024-06-27 17:55:05,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:05,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:55:05,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:05,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:55:05,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:55:05,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-06-27 17:55:05,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 102 transitions, 858 flow. Second operand has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 0 states have call successors, (0), 0 states 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 17:55:05,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:05,491 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-06-27 17:55:05,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:05,904 INFO L124 PetriNetUnfolderBase]: 2171/3514 cut-off events. [2024-06-27 17:55:05,904 INFO L125 PetriNetUnfolderBase]: For 23555/23555 co-relation queries the response was YES. [2024-06-27 17:55:05,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15450 conditions, 3514 events. 2171/3514 cut-off events. For 23555/23555 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 20572 event pairs, 497 based on Foata normal form. 4/3513 useless extension candidates. Maximal degree in co-relation 15408. Up to 2727 conditions per place. [2024-06-27 17:55:05,936 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 100 selfloop transitions, 69 changer transitions 0/181 dead transitions. [2024-06-27 17:55:05,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 181 transitions, 1850 flow [2024-06-27 17:55:05,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:55:05,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:55:05,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 184 transitions. [2024-06-27 17:55:05,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-27 17:55:05,938 INFO L175 Difference]: Start difference. First operand has 98 places, 102 transitions, 858 flow. Second operand 6 states and 184 transitions. [2024-06-27 17:55:05,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 181 transitions, 1850 flow [2024-06-27 17:55:05,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 181 transitions, 1722 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-27 17:55:05,990 INFO L231 Difference]: Finished difference. Result has 103 places, 143 transitions, 1432 flow [2024-06-27 17:55:05,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=793, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1432, PETRI_PLACES=103, PETRI_TRANSITIONS=143} [2024-06-27 17:55:05,992 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 53 predicate places. [2024-06-27 17:55:05,992 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 143 transitions, 1432 flow [2024-06-27 17:55:05,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 0 states have call successors, (0), 0 states 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 17:55:05,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:05,992 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:05,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 17:55:05,993 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:55:05,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:05,993 INFO L85 PathProgramCache]: Analyzing trace with hash 320393997, now seen corresponding path program 2 times [2024-06-27 17:55:05,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:05,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585401799] [2024-06-27 17:55:05,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:05,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:06,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:06,139 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 17:55:06,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:06,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585401799] [2024-06-27 17:55:06,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585401799] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:06,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:06,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:55:06,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70052708] [2024-06-27 17:55:06,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:06,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:55:06,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:06,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:55:06,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:55:06,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:55:06,183 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 143 transitions, 1432 flow. Second operand has 6 states, 6 states have (on average 19.833333333333332) internal successors, (119), 6 states have internal predecessors, (119), 0 states have call successors, (0), 0 states 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 17:55:06,183 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:06,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:55:06,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:06,580 INFO L124 PetriNetUnfolderBase]: 1950/3244 cut-off events. [2024-06-27 17:55:06,580 INFO L125 PetriNetUnfolderBase]: For 25315/25315 co-relation queries the response was YES. [2024-06-27 17:55:06,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14852 conditions, 3244 events. 1950/3244 cut-off events. For 25315/25315 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 19444 event pairs, 697 based on Foata normal form. 4/3215 useless extension candidates. Maximal degree in co-relation 14807. Up to 2649 conditions per place. [2024-06-27 17:55:06,611 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 133 selfloop transitions, 39 changer transitions 0/187 dead transitions. [2024-06-27 17:55:06,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 187 transitions, 1942 flow [2024-06-27 17:55:06,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:55:06,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:55:06,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 212 transitions. [2024-06-27 17:55:06,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6583850931677019 [2024-06-27 17:55:06,613 INFO L175 Difference]: Start difference. First operand has 103 places, 143 transitions, 1432 flow. Second operand 7 states and 212 transitions. [2024-06-27 17:55:06,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 187 transitions, 1942 flow [2024-06-27 17:55:06,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 187 transitions, 1857 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-27 17:55:06,667 INFO L231 Difference]: Finished difference. Result has 108 places, 143 transitions, 1446 flow [2024-06-27 17:55:06,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1349, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1446, PETRI_PLACES=108, PETRI_TRANSITIONS=143} [2024-06-27 17:55:06,668 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 58 predicate places. [2024-06-27 17:55:06,668 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 143 transitions, 1446 flow [2024-06-27 17:55:06,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.833333333333332) internal successors, (119), 6 states have internal predecessors, (119), 0 states have call successors, (0), 0 states 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 17:55:06,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:06,669 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:06,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 17:55:06,669 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:55:06,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:06,670 INFO L85 PathProgramCache]: Analyzing trace with hash -421598917, now seen corresponding path program 3 times [2024-06-27 17:55:06,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:06,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594660738] [2024-06-27 17:55:06,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:06,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:06,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:06,793 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 17:55:06,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:06,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594660738] [2024-06-27 17:55:06,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594660738] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:06,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:06,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:55:06,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743947129] [2024-06-27 17:55:06,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:06,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:55:06,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:06,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:55:06,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:55:06,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:55:06,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 143 transitions, 1446 flow. Second operand has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states 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 17:55:06,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:06,843 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:55:06,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:07,240 INFO L124 PetriNetUnfolderBase]: 2004/3338 cut-off events. [2024-06-27 17:55:07,240 INFO L125 PetriNetUnfolderBase]: For 28114/28120 co-relation queries the response was YES. [2024-06-27 17:55:07,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15358 conditions, 3338 events. 2004/3338 cut-off events. For 28114/28120 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 20177 event pairs, 709 based on Foata normal form. 3/3301 useless extension candidates. Maximal degree in co-relation 15312. Up to 2491 conditions per place. [2024-06-27 17:55:07,271 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 100 selfloop transitions, 75 changer transitions 0/190 dead transitions. [2024-06-27 17:55:07,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 190 transitions, 2080 flow [2024-06-27 17:55:07,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:55:07,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:55:07,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 212 transitions. [2024-06-27 17:55:07,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6583850931677019 [2024-06-27 17:55:07,273 INFO L175 Difference]: Start difference. First operand has 108 places, 143 transitions, 1446 flow. Second operand 7 states and 212 transitions. [2024-06-27 17:55:07,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 190 transitions, 2080 flow [2024-06-27 17:55:07,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 190 transitions, 2002 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 17:55:07,329 INFO L231 Difference]: Finished difference. Result has 109 places, 152 transitions, 1647 flow [2024-06-27 17:55:07,329 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1368, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1647, PETRI_PLACES=109, PETRI_TRANSITIONS=152} [2024-06-27 17:55:07,329 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 59 predicate places. [2024-06-27 17:55:07,330 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 152 transitions, 1647 flow [2024-06-27 17:55:07,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states 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 17:55:07,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:07,331 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:07,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 17:55:07,331 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:55:07,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:07,332 INFO L85 PathProgramCache]: Analyzing trace with hash -421391527, now seen corresponding path program 4 times [2024-06-27 17:55:07,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:07,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927711197] [2024-06-27 17:55:07,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:07,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:07,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:07,445 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 17:55:07,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:07,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927711197] [2024-06-27 17:55:07,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927711197] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:07,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:07,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:55:07,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315149999] [2024-06-27 17:55:07,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:07,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:55:07,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:07,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:55:07,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:55:07,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:55:07,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 152 transitions, 1647 flow. Second operand has 6 states, 6 states have (on average 19.833333333333332) internal successors, (119), 6 states have internal predecessors, (119), 0 states have call successors, (0), 0 states 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 17:55:07,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:07,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:55:07,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:07,881 INFO L124 PetriNetUnfolderBase]: 2102/3526 cut-off events. [2024-06-27 17:55:07,882 INFO L125 PetriNetUnfolderBase]: For 34065/34070 co-relation queries the response was YES. [2024-06-27 17:55:07,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16840 conditions, 3526 events. 2102/3526 cut-off events. For 34065/34070 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 21635 event pairs, 712 based on Foata normal form. 6/3490 useless extension candidates. Maximal degree in co-relation 16793. Up to 2592 conditions per place. [2024-06-27 17:55:07,990 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 95 selfloop transitions, 92 changer transitions 0/202 dead transitions. [2024-06-27 17:55:07,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 202 transitions, 2473 flow [2024-06-27 17:55:08,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:55:08,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:55:08,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 187 transitions. [2024-06-27 17:55:08,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.677536231884058 [2024-06-27 17:55:08,001 INFO L175 Difference]: Start difference. First operand has 109 places, 152 transitions, 1647 flow. Second operand 6 states and 187 transitions. [2024-06-27 17:55:08,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 202 transitions, 2473 flow [2024-06-27 17:55:08,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 202 transitions, 2251 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-27 17:55:08,053 INFO L231 Difference]: Finished difference. Result has 110 places, 167 transitions, 1848 flow [2024-06-27 17:55:08,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1455, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1848, PETRI_PLACES=110, PETRI_TRANSITIONS=167} [2024-06-27 17:55:08,054 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 60 predicate places. [2024-06-27 17:55:08,054 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 167 transitions, 1848 flow [2024-06-27 17:55:08,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.833333333333332) internal successors, (119), 6 states have internal predecessors, (119), 0 states have call successors, (0), 0 states 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 17:55:08,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:08,055 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:08,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 17:55:08,055 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:55:08,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:08,056 INFO L85 PathProgramCache]: Analyzing trace with hash -421383591, now seen corresponding path program 1 times [2024-06-27 17:55:08,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:08,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171659418] [2024-06-27 17:55:08,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:08,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:08,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:08,163 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 17:55:08,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:08,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171659418] [2024-06-27 17:55:08,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171659418] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:08,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:08,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:55:08,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150172582] [2024-06-27 17:55:08,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:08,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:55:08,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:08,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:55:08,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:55:08,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:55:08,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 167 transitions, 1848 flow. Second operand has 6 states, 6 states have (on average 19.833333333333332) internal successors, (119), 6 states have internal predecessors, (119), 0 states have call successors, (0), 0 states 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 17:55:08,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:08,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:55:08,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:08,640 INFO L124 PetriNetUnfolderBase]: 2129/3588 cut-off events. [2024-06-27 17:55:08,640 INFO L125 PetriNetUnfolderBase]: For 36211/36214 co-relation queries the response was YES. [2024-06-27 17:55:08,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17089 conditions, 3588 events. 2129/3588 cut-off events. For 36211/36214 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 22147 event pairs, 731 based on Foata normal form. 7/3548 useless extension candidates. Maximal degree in co-relation 17041. Up to 2865 conditions per place. [2024-06-27 17:55:08,671 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 147 selfloop transitions, 40 changer transitions 0/202 dead transitions. [2024-06-27 17:55:08,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 202 transitions, 2342 flow [2024-06-27 17:55:08,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:55:08,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:55:08,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 181 transitions. [2024-06-27 17:55:08,673 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6557971014492754 [2024-06-27 17:55:08,674 INFO L175 Difference]: Start difference. First operand has 110 places, 167 transitions, 1848 flow. Second operand 6 states and 181 transitions. [2024-06-27 17:55:08,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 202 transitions, 2342 flow [2024-06-27 17:55:08,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 202 transitions, 2207 flow, removed 25 selfloop flow, removed 2 redundant places. [2024-06-27 17:55:08,737 INFO L231 Difference]: Finished difference. Result has 114 places, 169 transitions, 1826 flow [2024-06-27 17:55:08,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1713, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1826, PETRI_PLACES=114, PETRI_TRANSITIONS=169} [2024-06-27 17:55:08,738 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 64 predicate places. [2024-06-27 17:55:08,739 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 169 transitions, 1826 flow [2024-06-27 17:55:08,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.833333333333332) internal successors, (119), 6 states have internal predecessors, (119), 0 states have call successors, (0), 0 states 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 17:55:08,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:08,739 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:08,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 17:55:08,739 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:55:08,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:08,740 INFO L85 PathProgramCache]: Analyzing trace with hash 45373353, now seen corresponding path program 5 times [2024-06-27 17:55:08,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:08,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263777104] [2024-06-27 17:55:08,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:08,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:08,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:08,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:55:08,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:08,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263777104] [2024-06-27 17:55:08,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263777104] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:08,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:08,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:55:08,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175806213] [2024-06-27 17:55:08,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:08,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:55:08,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:08,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:55:08,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:55:08,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:55:08,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 169 transitions, 1826 flow. Second operand has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states 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 17:55:08,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:08,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:55:08,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:09,406 INFO L124 PetriNetUnfolderBase]: 2117/3503 cut-off events. [2024-06-27 17:55:09,406 INFO L125 PetriNetUnfolderBase]: For 38484/38484 co-relation queries the response was YES. [2024-06-27 17:55:09,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16828 conditions, 3503 events. 2117/3503 cut-off events. For 38484/38484 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 21139 event pairs, 642 based on Foata normal form. 3/3458 useless extension candidates. Maximal degree in co-relation 16779. Up to 2625 conditions per place. [2024-06-27 17:55:09,446 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 96 selfloop transitions, 94 changer transitions 0/205 dead transitions. [2024-06-27 17:55:09,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 205 transitions, 2384 flow [2024-06-27 17:55:09,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:55:09,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:55:09,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 208 transitions. [2024-06-27 17:55:09,449 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6459627329192547 [2024-06-27 17:55:09,449 INFO L175 Difference]: Start difference. First operand has 114 places, 169 transitions, 1826 flow. Second operand 7 states and 208 transitions. [2024-06-27 17:55:09,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 205 transitions, 2384 flow [2024-06-27 17:55:09,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 205 transitions, 2281 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-27 17:55:09,528 INFO L231 Difference]: Finished difference. Result has 117 places, 169 transitions, 1926 flow [2024-06-27 17:55:09,528 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1723, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1926, PETRI_PLACES=117, PETRI_TRANSITIONS=169} [2024-06-27 17:55:09,529 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 67 predicate places. [2024-06-27 17:55:09,529 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 169 transitions, 1926 flow [2024-06-27 17:55:09,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states 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 17:55:09,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:09,529 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:09,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 17:55:09,530 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:55:09,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:09,530 INFO L85 PathProgramCache]: Analyzing trace with hash 61133401, now seen corresponding path program 6 times [2024-06-27 17:55:09,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:09,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656592279] [2024-06-27 17:55:09,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:09,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:09,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:09,635 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 17:55:09,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:09,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656592279] [2024-06-27 17:55:09,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656592279] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:09,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:09,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:55:09,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223860615] [2024-06-27 17:55:09,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:09,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:55:09,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:09,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:55:09,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:55:09,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:55:09,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 169 transitions, 1926 flow. Second operand has 6 states, 6 states have (on average 19.833333333333332) internal successors, (119), 6 states have internal predecessors, (119), 0 states have call successors, (0), 0 states 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 17:55:09,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:09,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:55:09,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:10,053 INFO L124 PetriNetUnfolderBase]: 2110/3475 cut-off events. [2024-06-27 17:55:10,053 INFO L125 PetriNetUnfolderBase]: For 40996/41004 co-relation queries the response was YES. [2024-06-27 17:55:10,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17131 conditions, 3475 events. 2110/3475 cut-off events. For 40996/41004 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 20938 event pairs, 528 based on Foata normal form. 9/3449 useless extension candidates. Maximal degree in co-relation 17081. Up to 2617 conditions per place. [2024-06-27 17:55:10,130 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 91 selfloop transitions, 93 changer transitions 0/199 dead transitions. [2024-06-27 17:55:10,130 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 199 transitions, 2412 flow [2024-06-27 17:55:10,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:55:10,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:55:10,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 179 transitions. [2024-06-27 17:55:10,131 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6485507246376812 [2024-06-27 17:55:10,131 INFO L175 Difference]: Start difference. First operand has 117 places, 169 transitions, 1926 flow. Second operand 6 states and 179 transitions. [2024-06-27 17:55:10,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 199 transitions, 2412 flow [2024-06-27 17:55:10,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 199 transitions, 2174 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-27 17:55:10,197 INFO L231 Difference]: Finished difference. Result has 118 places, 171 transitions, 1920 flow [2024-06-27 17:55:10,197 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1700, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1920, PETRI_PLACES=118, PETRI_TRANSITIONS=171} [2024-06-27 17:55:10,198 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 68 predicate places. [2024-06-27 17:55:10,198 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 171 transitions, 1920 flow [2024-06-27 17:55:10,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.833333333333332) internal successors, (119), 6 states have internal predecessors, (119), 0 states have call successors, (0), 0 states 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 17:55:10,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:10,199 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:10,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 17:55:10,199 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:55:10,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:10,200 INFO L85 PathProgramCache]: Analyzing trace with hash 52738519, now seen corresponding path program 2 times [2024-06-27 17:55:10,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:10,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507431900] [2024-06-27 17:55:10,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:10,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:10,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:10,310 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 17:55:10,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:10,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507431900] [2024-06-27 17:55:10,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507431900] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:10,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:10,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:55:10,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746880135] [2024-06-27 17:55:10,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:10,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:55:10,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:10,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:55:10,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:55:10,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:55:10,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 171 transitions, 1920 flow. Second operand has 6 states, 6 states have (on average 19.833333333333332) internal successors, (119), 6 states have internal predecessors, (119), 0 states have call successors, (0), 0 states 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 17:55:10,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:10,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:55:10,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:10,735 INFO L124 PetriNetUnfolderBase]: 2137/3534 cut-off events. [2024-06-27 17:55:10,736 INFO L125 PetriNetUnfolderBase]: For 42836/42844 co-relation queries the response was YES. [2024-06-27 17:55:10,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17325 conditions, 3534 events. 2137/3534 cut-off events. For 42836/42844 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 21411 event pairs, 526 based on Foata normal form. 10/3514 useless extension candidates. Maximal degree in co-relation 17274. Up to 2890 conditions per place. [2024-06-27 17:55:10,761 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 150 selfloop transitions, 39 changer transitions 0/204 dead transitions. [2024-06-27 17:55:10,762 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 204 transitions, 2418 flow [2024-06-27 17:55:10,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:55:10,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:55:10,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 177 transitions. [2024-06-27 17:55:10,763 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6413043478260869 [2024-06-27 17:55:10,763 INFO L175 Difference]: Start difference. First operand has 118 places, 171 transitions, 1920 flow. Second operand 6 states and 177 transitions. [2024-06-27 17:55:10,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 204 transitions, 2418 flow [2024-06-27 17:55:10,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 204 transitions, 2260 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-27 17:55:10,841 INFO L231 Difference]: Finished difference. Result has 121 places, 173 transitions, 1876 flow [2024-06-27 17:55:10,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1762, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1876, PETRI_PLACES=121, PETRI_TRANSITIONS=173} [2024-06-27 17:55:10,842 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 71 predicate places. [2024-06-27 17:55:10,842 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 173 transitions, 1876 flow [2024-06-27 17:55:10,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.833333333333332) internal successors, (119), 6 states have internal predecessors, (119), 0 states have call successors, (0), 0 states 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 17:55:10,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:10,843 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:10,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 17:55:10,843 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:55:10,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:10,843 INFO L85 PathProgramCache]: Analyzing trace with hash 53007289, now seen corresponding path program 3 times [2024-06-27 17:55:10,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:10,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915313917] [2024-06-27 17:55:10,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:10,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:10,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:10,949 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 17:55:10,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:10,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915313917] [2024-06-27 17:55:10,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915313917] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:10,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:10,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:55:10,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654488198] [2024-06-27 17:55:10,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:10,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:55:10,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:10,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:55:10,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:55:11,003 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:55:11,004 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 173 transitions, 1876 flow. Second operand has 6 states, 6 states have (on average 19.833333333333332) internal successors, (119), 6 states have internal predecessors, (119), 0 states have call successors, (0), 0 states 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 17:55:11,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:11,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:55:11,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:11,428 INFO L124 PetriNetUnfolderBase]: 2129/3604 cut-off events. [2024-06-27 17:55:11,428 INFO L125 PetriNetUnfolderBase]: For 45817/45825 co-relation queries the response was YES. [2024-06-27 17:55:11,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17240 conditions, 3604 events. 2129/3604 cut-off events. For 45817/45825 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 22534 event pairs, 693 based on Foata normal form. 10/3566 useless extension candidates. Maximal degree in co-relation 17187. Up to 2778 conditions per place. [2024-06-27 17:55:11,454 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 148 selfloop transitions, 44 changer transitions 0/207 dead transitions. [2024-06-27 17:55:11,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 207 transitions, 2384 flow [2024-06-27 17:55:11,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:55:11,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:55:11,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 178 transitions. [2024-06-27 17:55:11,456 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.644927536231884 [2024-06-27 17:55:11,456 INFO L175 Difference]: Start difference. First operand has 121 places, 173 transitions, 1876 flow. Second operand 6 states and 178 transitions. [2024-06-27 17:55:11,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 207 transitions, 2384 flow [2024-06-27 17:55:11,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 207 transitions, 2290 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-27 17:55:11,538 INFO L231 Difference]: Finished difference. Result has 123 places, 175 transitions, 1909 flow [2024-06-27 17:55:11,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1782, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1909, PETRI_PLACES=123, PETRI_TRANSITIONS=175} [2024-06-27 17:55:11,539 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 73 predicate places. [2024-06-27 17:55:11,539 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 175 transitions, 1909 flow [2024-06-27 17:55:11,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.833333333333332) internal successors, (119), 6 states have internal predecessors, (119), 0 states have call successors, (0), 0 states 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 17:55:11,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:11,540 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:11,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 17:55:11,540 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:55:11,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:11,540 INFO L85 PathProgramCache]: Analyzing trace with hash 791830724, now seen corresponding path program 1 times [2024-06-27 17:55:11,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:11,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614868205] [2024-06-27 17:55:11,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:11,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:11,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:11,624 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 17:55:11,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:11,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614868205] [2024-06-27 17:55:11,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614868205] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:11,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:11,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:55:11,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536533236] [2024-06-27 17:55:11,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:11,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:55:11,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:11,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:55:11,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:55:11,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 46 [2024-06-27 17:55:11,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 175 transitions, 1909 flow. Second operand has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 0 states have call successors, (0), 0 states 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 17:55:11,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:11,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 46 [2024-06-27 17:55:11,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:11,967 INFO L124 PetriNetUnfolderBase]: 1949/3353 cut-off events. [2024-06-27 17:55:11,967 INFO L125 PetriNetUnfolderBase]: For 47179/47190 co-relation queries the response was YES. [2024-06-27 17:55:11,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16707 conditions, 3353 events. 1949/3353 cut-off events. For 47179/47190 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 20929 event pairs, 454 based on Foata normal form. 2/3331 useless extension candidates. Maximal degree in co-relation 16653. Up to 2682 conditions per place. [2024-06-27 17:55:11,989 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 160 selfloop transitions, 22 changer transitions 0/204 dead transitions. [2024-06-27 17:55:11,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 204 transitions, 2487 flow [2024-06-27 17:55:11,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:55:11,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:55:11,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 152 transitions. [2024-06-27 17:55:11,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6608695652173913 [2024-06-27 17:55:11,993 INFO L175 Difference]: Start difference. First operand has 123 places, 175 transitions, 1909 flow. Second operand 5 states and 152 transitions. [2024-06-27 17:55:11,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 204 transitions, 2487 flow [2024-06-27 17:55:12,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 204 transitions, 2378 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-27 17:55:12,093 INFO L231 Difference]: Finished difference. Result has 125 places, 184 transitions, 1948 flow [2024-06-27 17:55:12,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1800, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1948, PETRI_PLACES=125, PETRI_TRANSITIONS=184} [2024-06-27 17:55:12,094 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 75 predicate places. [2024-06-27 17:55:12,094 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 184 transitions, 1948 flow [2024-06-27 17:55:12,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 0 states have call successors, (0), 0 states 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 17:55:12,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:12,095 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:12,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 17:55:12,095 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:55:12,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:12,095 INFO L85 PathProgramCache]: Analyzing trace with hash -1235765756, now seen corresponding path program 2 times [2024-06-27 17:55:12,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:12,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347687024] [2024-06-27 17:55:12,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:12,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:12,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:12,196 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 17:55:12,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:12,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347687024] [2024-06-27 17:55:12,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347687024] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:12,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:12,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:55:12,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365311432] [2024-06-27 17:55:12,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:12,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:55:12,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:12,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:55:12,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:55:12,238 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 46 [2024-06-27 17:55:12,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 184 transitions, 1948 flow. Second operand has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 0 states have call successors, (0), 0 states 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 17:55:12,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:12,239 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 46 [2024-06-27 17:55:12,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:12,579 INFO L124 PetriNetUnfolderBase]: 1963/3491 cut-off events. [2024-06-27 17:55:12,580 INFO L125 PetriNetUnfolderBase]: For 48985/49003 co-relation queries the response was YES. [2024-06-27 17:55:12,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17156 conditions, 3491 events. 1963/3491 cut-off events. For 48985/49003 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 22252 event pairs, 554 based on Foata normal form. 10/3475 useless extension candidates. Maximal degree in co-relation 17100. Up to 2738 conditions per place. [2024-06-27 17:55:12,602 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 167 selfloop transitions, 20 changer transitions 0/209 dead transitions. [2024-06-27 17:55:12,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 209 transitions, 2459 flow [2024-06-27 17:55:12,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:55:12,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:55:12,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 154 transitions. [2024-06-27 17:55:12,603 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6695652173913044 [2024-06-27 17:55:12,603 INFO L175 Difference]: Start difference. First operand has 125 places, 184 transitions, 1948 flow. Second operand 5 states and 154 transitions. [2024-06-27 17:55:12,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 209 transitions, 2459 flow [2024-06-27 17:55:12,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 209 transitions, 2409 flow, removed 25 selfloop flow, removed 0 redundant places. [2024-06-27 17:55:12,675 INFO L231 Difference]: Finished difference. Result has 131 places, 187 transitions, 1994 flow [2024-06-27 17:55:12,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1904, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1994, PETRI_PLACES=131, PETRI_TRANSITIONS=187} [2024-06-27 17:55:12,676 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 81 predicate places. [2024-06-27 17:55:12,676 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 187 transitions, 1994 flow [2024-06-27 17:55:12,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 0 states have call successors, (0), 0 states 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 17:55:12,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:12,676 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:12,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 17:55:12,677 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:55:12,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:12,677 INFO L85 PathProgramCache]: Analyzing trace with hash 1339418171, now seen corresponding path program 1 times [2024-06-27 17:55:12,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:12,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59051321] [2024-06-27 17:55:12,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:12,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:12,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:12,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:55:12,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:12,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59051321] [2024-06-27 17:55:12,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59051321] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:12,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:12,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:55:12,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652689434] [2024-06-27 17:55:12,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:12,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:55:12,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:12,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:55:12,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:55:12,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:55:12,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 187 transitions, 1994 flow. Second operand has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states 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 17:55:12,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:12,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:55:12,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:13,379 INFO L124 PetriNetUnfolderBase]: 2472/4028 cut-off events. [2024-06-27 17:55:13,379 INFO L125 PetriNetUnfolderBase]: For 63802/63802 co-relation queries the response was YES. [2024-06-27 17:55:13,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20855 conditions, 4028 events. 2472/4028 cut-off events. For 63802/63802 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 24909 event pairs, 329 based on Foata normal form. 6/4012 useless extension candidates. Maximal degree in co-relation 20795. Up to 2894 conditions per place. [2024-06-27 17:55:13,401 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 191 selfloop transitions, 43 changer transitions 0/249 dead transitions. [2024-06-27 17:55:13,402 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 249 transitions, 2816 flow [2024-06-27 17:55:13,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:55:13,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:55:13,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 247 transitions. [2024-06-27 17:55:13,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6711956521739131 [2024-06-27 17:55:13,404 INFO L175 Difference]: Start difference. First operand has 131 places, 187 transitions, 1994 flow. Second operand 8 states and 247 transitions. [2024-06-27 17:55:13,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 249 transitions, 2816 flow [2024-06-27 17:55:13,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 249 transitions, 2784 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 17:55:13,504 INFO L231 Difference]: Finished difference. Result has 137 places, 194 transitions, 2161 flow [2024-06-27 17:55:13,504 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1962, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2161, PETRI_PLACES=137, PETRI_TRANSITIONS=194} [2024-06-27 17:55:13,505 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 87 predicate places. [2024-06-27 17:55:13,505 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 194 transitions, 2161 flow [2024-06-27 17:55:13,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states 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 17:55:13,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:13,505 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:13,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 17:55:13,505 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:55:13,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:13,506 INFO L85 PathProgramCache]: Analyzing trace with hash 1339478621, now seen corresponding path program 2 times [2024-06-27 17:55:13,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:13,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399537959] [2024-06-27 17:55:13,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:13,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:13,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:13,625 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 17:55:13,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:13,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399537959] [2024-06-27 17:55:13,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399537959] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:13,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:13,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:55:13,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538620418] [2024-06-27 17:55:13,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:13,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:55:13,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:13,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:55:13,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:55:13,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:55:13,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 194 transitions, 2161 flow. Second operand has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states 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 17:55:13,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:13,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:55:13,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:14,171 INFO L124 PetriNetUnfolderBase]: 2459/4108 cut-off events. [2024-06-27 17:55:14,171 INFO L125 PetriNetUnfolderBase]: For 68633/68633 co-relation queries the response was YES. [2024-06-27 17:55:14,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21641 conditions, 4108 events. 2459/4108 cut-off events. For 68633/68633 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 26026 event pairs, 767 based on Foata normal form. 6/4063 useless extension candidates. Maximal degree in co-relation 21579. Up to 3348 conditions per place. [2024-06-27 17:55:14,201 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 189 selfloop transitions, 42 changer transitions 0/246 dead transitions. [2024-06-27 17:55:14,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 246 transitions, 2823 flow [2024-06-27 17:55:14,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:55:14,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:55:14,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 240 transitions. [2024-06-27 17:55:14,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6521739130434783 [2024-06-27 17:55:14,203 INFO L175 Difference]: Start difference. First operand has 137 places, 194 transitions, 2161 flow. Second operand 8 states and 240 transitions. [2024-06-27 17:55:14,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 246 transitions, 2823 flow [2024-06-27 17:55:14,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 246 transitions, 2736 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-27 17:55:14,317 INFO L231 Difference]: Finished difference. Result has 141 places, 197 transitions, 2224 flow [2024-06-27 17:55:14,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2078, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2224, PETRI_PLACES=141, PETRI_TRANSITIONS=197} [2024-06-27 17:55:14,318 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 91 predicate places. [2024-06-27 17:55:14,318 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 197 transitions, 2224 flow [2024-06-27 17:55:14,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states 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 17:55:14,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:14,319 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:14,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 17:55:14,319 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:55:14,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:14,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1623205435, now seen corresponding path program 3 times [2024-06-27 17:55:14,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:14,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754455362] [2024-06-27 17:55:14,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:14,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:14,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:14,435 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 17:55:14,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:14,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754455362] [2024-06-27 17:55:14,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754455362] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:14,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:14,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:55:14,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991451258] [2024-06-27 17:55:14,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:14,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:55:14,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:14,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:55:14,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:55:14,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:55:14,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 197 transitions, 2224 flow. Second operand has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states 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 17:55:14,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:14,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:55:14,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:14,997 INFO L124 PetriNetUnfolderBase]: 2490/4148 cut-off events. [2024-06-27 17:55:14,997 INFO L125 PetriNetUnfolderBase]: For 73694/73704 co-relation queries the response was YES. [2024-06-27 17:55:15,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22183 conditions, 4148 events. 2490/4148 cut-off events. For 73694/73704 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 26287 event pairs, 773 based on Foata normal form. 4/4094 useless extension candidates. Maximal degree in co-relation 22119. Up to 3157 conditions per place. [2024-06-27 17:55:15,036 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 127 selfloop transitions, 94 changer transitions 0/236 dead transitions. [2024-06-27 17:55:15,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 236 transitions, 2814 flow [2024-06-27 17:55:15,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:55:15,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:55:15,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 210 transitions. [2024-06-27 17:55:15,038 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6521739130434783 [2024-06-27 17:55:15,038 INFO L175 Difference]: Start difference. First operand has 141 places, 197 transitions, 2224 flow. Second operand 7 states and 210 transitions. [2024-06-27 17:55:15,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 236 transitions, 2814 flow [2024-06-27 17:55:15,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 236 transitions, 2702 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-27 17:55:15,172 INFO L231 Difference]: Finished difference. Result has 142 places, 199 transitions, 2354 flow [2024-06-27 17:55:15,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2112, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2354, PETRI_PLACES=142, PETRI_TRANSITIONS=199} [2024-06-27 17:55:15,172 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 92 predicate places. [2024-06-27 17:55:15,173 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 199 transitions, 2354 flow [2024-06-27 17:55:15,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states 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 17:55:15,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:15,173 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:15,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 17:55:15,173 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:55:15,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:15,173 INFO L85 PathProgramCache]: Analyzing trace with hash -2067208577, now seen corresponding path program 1 times [2024-06-27 17:55:15,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:15,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869271989] [2024-06-27 17:55:15,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:15,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:15,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:15,281 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 17:55:15,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:15,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869271989] [2024-06-27 17:55:15,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869271989] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:15,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:15,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:55:15,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489700609] [2024-06-27 17:55:15,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:15,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:55:15,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:15,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:55:15,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:55:15,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 46 [2024-06-27 17:55:15,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 199 transitions, 2354 flow. Second operand has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:15,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:15,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 46 [2024-06-27 17:55:15,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:15,681 INFO L124 PetriNetUnfolderBase]: 2387/4094 cut-off events. [2024-06-27 17:55:15,682 INFO L125 PetriNetUnfolderBase]: For 77388/77398 co-relation queries the response was YES. [2024-06-27 17:55:15,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21992 conditions, 4094 events. 2387/4094 cut-off events. For 77388/77398 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 26823 event pairs, 777 based on Foata normal form. 5/4039 useless extension candidates. Maximal degree in co-relation 21927. Up to 3282 conditions per place. [2024-06-27 17:55:15,709 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 175 selfloop transitions, 30 changer transitions 0/235 dead transitions. [2024-06-27 17:55:15,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 235 transitions, 2971 flow [2024-06-27 17:55:15,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:55:15,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:55:15,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 180 transitions. [2024-06-27 17:55:15,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6521739130434783 [2024-06-27 17:55:15,710 INFO L175 Difference]: Start difference. First operand has 142 places, 199 transitions, 2354 flow. Second operand 6 states and 180 transitions. [2024-06-27 17:55:15,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 235 transitions, 2971 flow [2024-06-27 17:55:15,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 235 transitions, 2749 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-27 17:55:15,834 INFO L231 Difference]: Finished difference. Result has 144 places, 210 transitions, 2303 flow [2024-06-27 17:55:15,835 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2132, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2303, PETRI_PLACES=144, PETRI_TRANSITIONS=210} [2024-06-27 17:55:15,835 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 94 predicate places. [2024-06-27 17:55:15,835 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 210 transitions, 2303 flow [2024-06-27 17:55:15,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:15,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:15,836 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:15,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 17:55:15,836 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:55:15,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:15,836 INFO L85 PathProgramCache]: Analyzing trace with hash -2012474041, now seen corresponding path program 4 times [2024-06-27 17:55:15,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:15,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208058053] [2024-06-27 17:55:15,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:15,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:15,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:15,936 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 17:55:15,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:15,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208058053] [2024-06-27 17:55:15,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208058053] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:15,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:15,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:55:15,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566772077] [2024-06-27 17:55:15,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:15,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:55:15,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:15,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:55:15,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:55:15,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:55:15,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 210 transitions, 2303 flow. Second operand has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states 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 17:55:15,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:15,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:55:15,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:16,400 INFO L124 PetriNetUnfolderBase]: 2525/4151 cut-off events. [2024-06-27 17:55:16,400 INFO L125 PetriNetUnfolderBase]: For 79580/79580 co-relation queries the response was YES. [2024-06-27 17:55:16,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22497 conditions, 4151 events. 2525/4151 cut-off events. For 79580/79580 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 25936 event pairs, 532 based on Foata normal form. 4/4100 useless extension candidates. Maximal degree in co-relation 22430. Up to 3205 conditions per place. [2024-06-27 17:55:16,432 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 134 selfloop transitions, 98 changer transitions 0/247 dead transitions. [2024-06-27 17:55:16,433 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 247 transitions, 2915 flow [2024-06-27 17:55:16,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:55:16,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:55:16,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 206 transitions. [2024-06-27 17:55:16,434 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.639751552795031 [2024-06-27 17:55:16,434 INFO L175 Difference]: Start difference. First operand has 144 places, 210 transitions, 2303 flow. Second operand 7 states and 206 transitions. [2024-06-27 17:55:16,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 247 transitions, 2915 flow [2024-06-27 17:55:16,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 247 transitions, 2885 flow, removed 11 selfloop flow, removed 1 redundant places. [2024-06-27 17:55:16,551 INFO L231 Difference]: Finished difference. Result has 150 places, 212 transitions, 2527 flow [2024-06-27 17:55:16,552 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2273, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2527, PETRI_PLACES=150, PETRI_TRANSITIONS=212} [2024-06-27 17:55:16,552 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 100 predicate places. [2024-06-27 17:55:16,552 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 212 transitions, 2527 flow [2024-06-27 17:55:16,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states 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 17:55:16,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:16,553 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:16,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 17:55:16,553 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:55:16,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:16,554 INFO L85 PathProgramCache]: Analyzing trace with hash 28378983, now seen corresponding path program 2 times [2024-06-27 17:55:16,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:16,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380916036] [2024-06-27 17:55:16,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:16,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:16,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:16,646 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 17:55:16,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:16,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380916036] [2024-06-27 17:55:16,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380916036] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:16,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:16,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:55:16,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162108473] [2024-06-27 17:55:16,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:16,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:55:16,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:16,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:55:16,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:55:16,689 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 46 [2024-06-27 17:55:16,690 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 212 transitions, 2527 flow. Second operand has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:16,690 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:16,690 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 46 [2024-06-27 17:55:16,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:17,062 INFO L124 PetriNetUnfolderBase]: 2399/4119 cut-off events. [2024-06-27 17:55:17,062 INFO L125 PetriNetUnfolderBase]: For 85109/85117 co-relation queries the response was YES. [2024-06-27 17:55:17,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22649 conditions, 4119 events. 2399/4119 cut-off events. For 85109/85117 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 26973 event pairs, 775 based on Foata normal form. 4/4063 useless extension candidates. Maximal degree in co-relation 22580. Up to 3287 conditions per place. [2024-06-27 17:55:17,093 INFO L140 encePairwiseOnDemand]: 39/46 looper letters, 176 selfloop transitions, 31 changer transitions 0/237 dead transitions. [2024-06-27 17:55:17,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 237 transitions, 3087 flow [2024-06-27 17:55:17,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:55:17,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:55:17,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 155 transitions. [2024-06-27 17:55:17,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6739130434782609 [2024-06-27 17:55:17,094 INFO L175 Difference]: Start difference. First operand has 150 places, 212 transitions, 2527 flow. Second operand 5 states and 155 transitions. [2024-06-27 17:55:17,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 237 transitions, 3087 flow [2024-06-27 17:55:17,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 237 transitions, 2853 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-27 17:55:17,252 INFO L231 Difference]: Finished difference. Result has 150 places, 215 transitions, 2393 flow [2024-06-27 17:55:17,252 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2293, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2393, PETRI_PLACES=150, PETRI_TRANSITIONS=215} [2024-06-27 17:55:17,252 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 100 predicate places. [2024-06-27 17:55:17,253 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 215 transitions, 2393 flow [2024-06-27 17:55:17,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:17,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:17,253 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:17,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 17:55:17,253 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:55:17,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:17,254 INFO L85 PathProgramCache]: Analyzing trace with hash -1098072147, now seen corresponding path program 3 times [2024-06-27 17:55:17,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:17,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222630149] [2024-06-27 17:55:17,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:17,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:17,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:17,357 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 17:55:17,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:17,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222630149] [2024-06-27 17:55:17,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222630149] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:17,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:17,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:55:17,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543084347] [2024-06-27 17:55:17,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:17,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:55:17,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:17,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:55:17,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:55:17,395 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 46 [2024-06-27 17:55:17,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 215 transitions, 2393 flow. Second operand has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:17,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:17,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 46 [2024-06-27 17:55:17,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:17,836 INFO L124 PetriNetUnfolderBase]: 2401/4029 cut-off events. [2024-06-27 17:55:17,836 INFO L125 PetriNetUnfolderBase]: For 83156/83158 co-relation queries the response was YES. [2024-06-27 17:55:17,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22002 conditions, 4029 events. 2401/4029 cut-off events. For 83156/83158 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 25700 event pairs, 480 based on Foata normal form. 2/4002 useless extension candidates. Maximal degree in co-relation 21932. Up to 3310 conditions per place. [2024-06-27 17:55:17,866 INFO L140 encePairwiseOnDemand]: 39/46 looper letters, 178 selfloop transitions, 25 changer transitions 0/233 dead transitions. [2024-06-27 17:55:17,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 233 transitions, 2853 flow [2024-06-27 17:55:17,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 17:55:17,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 17:55:17,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 129 transitions. [2024-06-27 17:55:17,867 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7010869565217391 [2024-06-27 17:55:17,867 INFO L175 Difference]: Start difference. First operand has 150 places, 215 transitions, 2393 flow. Second operand 4 states and 129 transitions. [2024-06-27 17:55:17,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 233 transitions, 2853 flow [2024-06-27 17:55:18,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 233 transitions, 2794 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-27 17:55:18,019 INFO L231 Difference]: Finished difference. Result has 151 places, 215 transitions, 2406 flow [2024-06-27 17:55:18,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2334, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2406, PETRI_PLACES=151, PETRI_TRANSITIONS=215} [2024-06-27 17:55:18,020 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 101 predicate places. [2024-06-27 17:55:18,020 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 215 transitions, 2406 flow [2024-06-27 17:55:18,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:18,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:18,020 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:18,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 17:55:18,021 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:55:18,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:18,021 INFO L85 PathProgramCache]: Analyzing trace with hash -1146853717, now seen corresponding path program 1 times [2024-06-27 17:55:18,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:18,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417601556] [2024-06-27 17:55:18,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:18,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:18,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:18,098 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 17:55:18,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:18,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417601556] [2024-06-27 17:55:18,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417601556] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:18,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:18,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:55:18,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908287217] [2024-06-27 17:55:18,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:18,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:55:18,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:18,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:55:18,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:55:18,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 46 [2024-06-27 17:55:18,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 215 transitions, 2406 flow. Second operand has 5 states, 5 states have (on average 21.6) internal successors, (108), 5 states have internal predecessors, (108), 0 states have call successors, (0), 0 states 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 17:55:18,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:18,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 46 [2024-06-27 17:55:18,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:18,587 INFO L124 PetriNetUnfolderBase]: 2331/4118 cut-off events. [2024-06-27 17:55:18,587 INFO L125 PetriNetUnfolderBase]: For 85503/85536 co-relation queries the response was YES. [2024-06-27 17:55:18,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21982 conditions, 4118 events. 2331/4118 cut-off events. For 85503/85536 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 27190 event pairs, 592 based on Foata normal form. 15/4093 useless extension candidates. Maximal degree in co-relation 21912. Up to 3232 conditions per place. [2024-06-27 17:55:18,616 INFO L140 encePairwiseOnDemand]: 39/46 looper letters, 184 selfloop transitions, 25 changer transitions 0/237 dead transitions. [2024-06-27 17:55:18,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 237 transitions, 2965 flow [2024-06-27 17:55:18,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:55:18,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:55:18,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 151 transitions. [2024-06-27 17:55:18,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6565217391304348 [2024-06-27 17:55:18,617 INFO L175 Difference]: Start difference. First operand has 151 places, 215 transitions, 2406 flow. Second operand 5 states and 151 transitions. [2024-06-27 17:55:18,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 237 transitions, 2965 flow [2024-06-27 17:55:18,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 237 transitions, 2915 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 17:55:18,776 INFO L231 Difference]: Finished difference. Result has 153 places, 218 transitions, 2443 flow [2024-06-27 17:55:18,776 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2356, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2443, PETRI_PLACES=153, PETRI_TRANSITIONS=218} [2024-06-27 17:55:18,776 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 103 predicate places. [2024-06-27 17:55:18,776 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 218 transitions, 2443 flow [2024-06-27 17:55:18,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.6) internal successors, (108), 5 states have internal predecessors, (108), 0 states have call successors, (0), 0 states 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 17:55:18,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:18,777 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:18,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 17:55:18,777 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:55:18,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:18,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1221522237, now seen corresponding path program 2 times [2024-06-27 17:55:18,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:18,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740796235] [2024-06-27 17:55:18,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:18,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:18,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:18,881 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 17:55:18,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:18,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740796235] [2024-06-27 17:55:18,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740796235] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:18,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:18,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:55:18,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107344559] [2024-06-27 17:55:18,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:18,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:55:18,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:18,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:55:18,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:55:18,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 46 [2024-06-27 17:55:18,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 218 transitions, 2443 flow. Second operand has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:18,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:18,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 46 [2024-06-27 17:55:18,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:19,375 INFO L124 PetriNetUnfolderBase]: 2309/3955 cut-off events. [2024-06-27 17:55:19,375 INFO L125 PetriNetUnfolderBase]: For 87037/87055 co-relation queries the response was YES. [2024-06-27 17:55:19,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21800 conditions, 3955 events. 2309/3955 cut-off events. For 87037/87055 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 25742 event pairs, 456 based on Foata normal form. 9/3931 useless extension candidates. Maximal degree in co-relation 21729. Up to 3193 conditions per place. [2024-06-27 17:55:19,404 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 184 selfloop transitions, 28 changer transitions 0/240 dead transitions. [2024-06-27 17:55:19,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 240 transitions, 2985 flow [2024-06-27 17:55:19,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:55:19,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:55:19,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 176 transitions. [2024-06-27 17:55:19,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6376811594202898 [2024-06-27 17:55:19,405 INFO L175 Difference]: Start difference. First operand has 153 places, 218 transitions, 2443 flow. Second operand 6 states and 176 transitions. [2024-06-27 17:55:19,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 240 transitions, 2985 flow [2024-06-27 17:55:19,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 240 transitions, 2913 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-27 17:55:19,602 INFO L231 Difference]: Finished difference. Result has 156 places, 218 transitions, 2433 flow [2024-06-27 17:55:19,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2371, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2433, PETRI_PLACES=156, PETRI_TRANSITIONS=218} [2024-06-27 17:55:19,602 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 106 predicate places. [2024-06-27 17:55:19,603 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 218 transitions, 2433 flow [2024-06-27 17:55:19,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:19,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:19,603 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:19,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 17:55:19,603 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:55:19,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:19,603 INFO L85 PathProgramCache]: Analyzing trace with hash 1496992451, now seen corresponding path program 3 times [2024-06-27 17:55:19,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:19,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810567465] [2024-06-27 17:55:19,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:19,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:19,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:19,690 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 17:55:19,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:19,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810567465] [2024-06-27 17:55:19,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810567465] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:19,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:19,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:55:19,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935872826] [2024-06-27 17:55:19,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:19,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:55:19,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:19,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:55:19,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:55:19,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 46 [2024-06-27 17:55:19,729 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 218 transitions, 2433 flow. Second operand has 5 states, 5 states have (on average 21.6) internal successors, (108), 5 states have internal predecessors, (108), 0 states have call successors, (0), 0 states 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 17:55:19,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:19,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 46 [2024-06-27 17:55:19,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:20,117 INFO L124 PetriNetUnfolderBase]: 2305/3923 cut-off events. [2024-06-27 17:55:20,118 INFO L125 PetriNetUnfolderBase]: For 88853/88871 co-relation queries the response was YES. [2024-06-27 17:55:20,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21784 conditions, 3923 events. 2305/3923 cut-off events. For 88853/88871 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 25294 event pairs, 443 based on Foata normal form. 2/3894 useless extension candidates. Maximal degree in co-relation 21713. Up to 3209 conditions per place. [2024-06-27 17:55:20,157 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 191 selfloop transitions, 20 changer transitions 0/239 dead transitions. [2024-06-27 17:55:20,158 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 239 transitions, 2913 flow [2024-06-27 17:55:20,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:55:20,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:55:20,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 153 transitions. [2024-06-27 17:55:20,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6652173913043479 [2024-06-27 17:55:20,159 INFO L175 Difference]: Start difference. First operand has 156 places, 218 transitions, 2433 flow. Second operand 5 states and 153 transitions. [2024-06-27 17:55:20,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 239 transitions, 2913 flow [2024-06-27 17:55:20,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 239 transitions, 2819 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-27 17:55:20,341 INFO L231 Difference]: Finished difference. Result has 155 places, 218 transitions, 2389 flow [2024-06-27 17:55:20,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2339, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2389, PETRI_PLACES=155, PETRI_TRANSITIONS=218} [2024-06-27 17:55:20,342 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 105 predicate places. [2024-06-27 17:55:20,342 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 218 transitions, 2389 flow [2024-06-27 17:55:20,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.6) internal successors, (108), 5 states have internal predecessors, (108), 0 states have call successors, (0), 0 states 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 17:55:20,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:20,342 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:20,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 17:55:20,342 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:55:20,343 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:20,343 INFO L85 PathProgramCache]: Analyzing trace with hash 1547085785, now seen corresponding path program 1 times [2024-06-27 17:55:20,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:20,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757256104] [2024-06-27 17:55:20,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:20,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:20,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:20,451 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 17:55:20,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:20,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757256104] [2024-06-27 17:55:20,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757256104] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:20,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:20,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:55:20,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638915845] [2024-06-27 17:55:20,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:20,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:55:20,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:20,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:55:20,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:55:20,490 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 46 [2024-06-27 17:55:20,490 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 218 transitions, 2389 flow. Second operand has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:20,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:20,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 46 [2024-06-27 17:55:20,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:20,849 INFO L124 PetriNetUnfolderBase]: 2399/4110 cut-off events. [2024-06-27 17:55:20,849 INFO L125 PetriNetUnfolderBase]: For 92688/92708 co-relation queries the response was YES. [2024-06-27 17:55:20,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22103 conditions, 4110 events. 2399/4110 cut-off events. For 92688/92708 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 26954 event pairs, 827 based on Foata normal form. 6/4046 useless extension candidates. Maximal degree in co-relation 22032. Up to 3388 conditions per place. [2024-06-27 17:55:20,881 INFO L140 encePairwiseOnDemand]: 41/46 looper letters, 193 selfloop transitions, 10 changer transitions 0/233 dead transitions. [2024-06-27 17:55:20,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 233 transitions, 2849 flow [2024-06-27 17:55:20,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 17:55:20,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 17:55:20,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 121 transitions. [2024-06-27 17:55:20,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.657608695652174 [2024-06-27 17:55:20,882 INFO L175 Difference]: Start difference. First operand has 155 places, 218 transitions, 2389 flow. Second operand 4 states and 121 transitions. [2024-06-27 17:55:20,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 233 transitions, 2849 flow [2024-06-27 17:55:21,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 233 transitions, 2809 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-27 17:55:21,035 INFO L231 Difference]: Finished difference. Result has 155 places, 220 transitions, 2398 flow [2024-06-27 17:55:21,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2349, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2398, PETRI_PLACES=155, PETRI_TRANSITIONS=220} [2024-06-27 17:55:21,036 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 105 predicate places. [2024-06-27 17:55:21,036 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 220 transitions, 2398 flow [2024-06-27 17:55:21,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:21,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:21,036 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:21,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 17:55:21,036 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:55:21,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:21,037 INFO L85 PathProgramCache]: Analyzing trace with hash 1977480796, now seen corresponding path program 1 times [2024-06-27 17:55:21,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:21,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774930041] [2024-06-27 17:55:21,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:21,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:21,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:21,158 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 17:55:21,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:21,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774930041] [2024-06-27 17:55:21,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774930041] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:21,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:21,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:55:21,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198463653] [2024-06-27 17:55:21,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:21,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:55:21,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:21,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:55:21,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:55:21,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:55:21,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 220 transitions, 2398 flow. Second operand has 7 states, 7 states have (on average 19.714285714285715) internal successors, (138), 7 states have internal predecessors, (138), 0 states have call successors, (0), 0 states 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 17:55:21,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:21,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:55:21,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:21,736 INFO L124 PetriNetUnfolderBase]: 2597/4255 cut-off events. [2024-06-27 17:55:21,737 INFO L125 PetriNetUnfolderBase]: For 106166/106166 co-relation queries the response was YES. [2024-06-27 17:55:21,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23648 conditions, 4255 events. 2597/4255 cut-off events. For 106166/106166 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 26734 event pairs, 315 based on Foata normal form. 18/4247 useless extension candidates. Maximal degree in co-relation 23576. Up to 2962 conditions per place. [2024-06-27 17:55:21,769 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 211 selfloop transitions, 52 changer transitions 0/278 dead transitions. [2024-06-27 17:55:21,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 278 transitions, 3260 flow [2024-06-27 17:55:21,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:55:21,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:55:21,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 248 transitions. [2024-06-27 17:55:21,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6739130434782609 [2024-06-27 17:55:21,770 INFO L175 Difference]: Start difference. First operand has 155 places, 220 transitions, 2398 flow. Second operand 8 states and 248 transitions. [2024-06-27 17:55:21,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 278 transitions, 3260 flow [2024-06-27 17:55:21,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 278 transitions, 3227 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-06-27 17:55:21,945 INFO L231 Difference]: Finished difference. Result has 161 places, 222 transitions, 2509 flow [2024-06-27 17:55:21,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2365, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2509, PETRI_PLACES=161, PETRI_TRANSITIONS=222} [2024-06-27 17:55:21,945 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 111 predicate places. [2024-06-27 17:55:21,945 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 222 transitions, 2509 flow [2024-06-27 17:55:21,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.714285714285715) internal successors, (138), 7 states have internal predecessors, (138), 0 states have call successors, (0), 0 states 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 17:55:21,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:21,946 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:21,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 17:55:21,946 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:55:21,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:21,947 INFO L85 PathProgramCache]: Analyzing trace with hash -1338995284, now seen corresponding path program 2 times [2024-06-27 17:55:21,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:21,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647588505] [2024-06-27 17:55:21,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:21,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:21,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:22,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:55:22,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:22,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647588505] [2024-06-27 17:55:22,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647588505] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:22,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:22,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:55:22,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032439576] [2024-06-27 17:55:22,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:22,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:55:22,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:22,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:55:22,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:55:22,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:55:22,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 222 transitions, 2509 flow. Second operand has 7 states, 7 states have (on average 19.714285714285715) internal successors, (138), 7 states have internal predecessors, (138), 0 states have call successors, (0), 0 states 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 17:55:22,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:22,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:55:22,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:22,628 INFO L124 PetriNetUnfolderBase]: 2551/4203 cut-off events. [2024-06-27 17:55:22,628 INFO L125 PetriNetUnfolderBase]: For 101514/101514 co-relation queries the response was YES. [2024-06-27 17:55:22,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23100 conditions, 4203 events. 2551/4203 cut-off events. For 101514/101514 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 26544 event pairs, 440 based on Foata normal form. 24/4199 useless extension candidates. Maximal degree in co-relation 23027. Up to 3287 conditions per place. [2024-06-27 17:55:22,662 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 214 selfloop transitions, 46 changer transitions 0/275 dead transitions. [2024-06-27 17:55:22,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 275 transitions, 3224 flow [2024-06-27 17:55:22,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:55:22,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:55:22,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 242 transitions. [2024-06-27 17:55:22,664 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.657608695652174 [2024-06-27 17:55:22,664 INFO L175 Difference]: Start difference. First operand has 161 places, 222 transitions, 2509 flow. Second operand 8 states and 242 transitions. [2024-06-27 17:55:22,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 275 transitions, 3224 flow [2024-06-27 17:55:22,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 275 transitions, 3107 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-27 17:55:22,829 INFO L231 Difference]: Finished difference. Result has 164 places, 223 transitions, 2523 flow [2024-06-27 17:55:22,830 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2403, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2523, PETRI_PLACES=164, PETRI_TRANSITIONS=223} [2024-06-27 17:55:22,830 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 114 predicate places. [2024-06-27 17:55:22,830 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 223 transitions, 2523 flow [2024-06-27 17:55:22,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.714285714285715) internal successors, (138), 7 states have internal predecessors, (138), 0 states have call successors, (0), 0 states 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 17:55:22,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:22,831 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:22,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 17:55:22,831 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:55:22,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:22,831 INFO L85 PathProgramCache]: Analyzing trace with hash -1220234602, now seen corresponding path program 3 times [2024-06-27 17:55:22,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:22,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513699765] [2024-06-27 17:55:22,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:22,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:22,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:22,964 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 17:55:22,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:22,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513699765] [2024-06-27 17:55:22,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513699765] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:22,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:22,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:55:22,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617020047] [2024-06-27 17:55:22,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:22,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:55:22,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:22,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:55:22,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:55:23,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:55:23,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 223 transitions, 2523 flow. Second operand has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states 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 17:55:23,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:23,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:55:23,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:23,546 INFO L124 PetriNetUnfolderBase]: 2707/4460 cut-off events. [2024-06-27 17:55:23,546 INFO L125 PetriNetUnfolderBase]: For 103332/103340 co-relation queries the response was YES. [2024-06-27 17:55:23,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24028 conditions, 4460 events. 2707/4460 cut-off events. For 103332/103340 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 28345 event pairs, 511 based on Foata normal form. 16/4440 useless extension candidates. Maximal degree in co-relation 23954. Up to 3368 conditions per place. [2024-06-27 17:55:23,581 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 162 selfloop transitions, 93 changer transitions 0/270 dead transitions. [2024-06-27 17:55:23,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 270 transitions, 3205 flow [2024-06-27 17:55:23,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:55:23,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:55:23,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 239 transitions. [2024-06-27 17:55:23,582 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6494565217391305 [2024-06-27 17:55:23,582 INFO L175 Difference]: Start difference. First operand has 164 places, 223 transitions, 2523 flow. Second operand 8 states and 239 transitions. [2024-06-27 17:55:23,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 270 transitions, 3205 flow [2024-06-27 17:55:23,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 270 transitions, 3117 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-27 17:55:23,820 INFO L231 Difference]: Finished difference. Result has 166 places, 224 transitions, 2660 flow [2024-06-27 17:55:23,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2435, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2660, PETRI_PLACES=166, PETRI_TRANSITIONS=224} [2024-06-27 17:55:23,820 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 116 predicate places. [2024-06-27 17:55:23,820 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 224 transitions, 2660 flow [2024-06-27 17:55:23,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states 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 17:55:23,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:23,820 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:23,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 17:55:23,821 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:55:23,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:23,821 INFO L85 PathProgramCache]: Analyzing trace with hash -1220238322, now seen corresponding path program 4 times [2024-06-27 17:55:23,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:23,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206687266] [2024-06-27 17:55:23,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:23,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:23,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:23,929 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 17:55:23,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:23,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206687266] [2024-06-27 17:55:23,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206687266] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:23,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:23,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:55:23,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568387647] [2024-06-27 17:55:23,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:23,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:55:23,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:23,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:55:23,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:55:23,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:55:23,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 224 transitions, 2660 flow. Second operand has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states 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 17:55:23,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:23,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:55:23,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:24,512 INFO L124 PetriNetUnfolderBase]: 2715/4476 cut-off events. [2024-06-27 17:55:24,513 INFO L125 PetriNetUnfolderBase]: For 108834/108842 co-relation queries the response was YES. [2024-06-27 17:55:24,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24728 conditions, 4476 events. 2715/4476 cut-off events. For 108834/108842 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 28603 event pairs, 475 based on Foata normal form. 12/4452 useless extension candidates. Maximal degree in co-relation 24653. Up to 3256 conditions per place. [2024-06-27 17:55:24,548 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 169 selfloop transitions, 96 changer transitions 0/280 dead transitions. [2024-06-27 17:55:24,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 280 transitions, 3394 flow [2024-06-27 17:55:24,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:55:24,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:55:24,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 268 transitions. [2024-06-27 17:55:24,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6473429951690821 [2024-06-27 17:55:24,551 INFO L175 Difference]: Start difference. First operand has 166 places, 224 transitions, 2660 flow. Second operand 9 states and 268 transitions. [2024-06-27 17:55:24,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 280 transitions, 3394 flow [2024-06-27 17:55:24,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 280 transitions, 3195 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-27 17:55:24,743 INFO L231 Difference]: Finished difference. Result has 169 places, 225 transitions, 2689 flow [2024-06-27 17:55:24,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2461, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2689, PETRI_PLACES=169, PETRI_TRANSITIONS=225} [2024-06-27 17:55:24,744 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 119 predicate places. [2024-06-27 17:55:24,744 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 225 transitions, 2689 flow [2024-06-27 17:55:24,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states 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 17:55:24,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:24,744 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:24,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 17:55:24,745 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:55:24,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:24,745 INFO L85 PathProgramCache]: Analyzing trace with hash -1020788662, now seen corresponding path program 5 times [2024-06-27 17:55:24,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:24,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757085785] [2024-06-27 17:55:24,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:24,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:24,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:24,851 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 17:55:24,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:24,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757085785] [2024-06-27 17:55:24,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757085785] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:24,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:24,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:55:24,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016126479] [2024-06-27 17:55:24,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:24,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:55:24,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:24,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:55:24,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:55:24,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:55:24,893 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 225 transitions, 2689 flow. Second operand has 7 states, 7 states have (on average 19.714285714285715) internal successors, (138), 7 states have internal predecessors, (138), 0 states have call successors, (0), 0 states 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 17:55:24,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:24,894 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:55:24,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:25,521 INFO L124 PetriNetUnfolderBase]: 2871/4759 cut-off events. [2024-06-27 17:55:25,521 INFO L125 PetriNetUnfolderBase]: For 118111/118116 co-relation queries the response was YES. [2024-06-27 17:55:25,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25940 conditions, 4759 events. 2871/4759 cut-off events. For 118111/118116 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 30832 event pairs, 547 based on Foata normal form. 19/4737 useless extension candidates. Maximal degree in co-relation 25864. Up to 3623 conditions per place. [2024-06-27 17:55:25,557 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 157 selfloop transitions, 95 changer transitions 0/267 dead transitions. [2024-06-27 17:55:25,557 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 267 transitions, 3355 flow [2024-06-27 17:55:25,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:55:25,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:55:25,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 212 transitions. [2024-06-27 17:55:25,558 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6583850931677019 [2024-06-27 17:55:25,558 INFO L175 Difference]: Start difference. First operand has 169 places, 225 transitions, 2689 flow. Second operand 7 states and 212 transitions. [2024-06-27 17:55:25,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 267 transitions, 3355 flow [2024-06-27 17:55:25,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 267 transitions, 3141 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-27 17:55:25,754 INFO L231 Difference]: Finished difference. Result has 169 places, 226 transitions, 2708 flow [2024-06-27 17:55:25,754 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2475, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2708, PETRI_PLACES=169, PETRI_TRANSITIONS=226} [2024-06-27 17:55:25,754 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 119 predicate places. [2024-06-27 17:55:25,754 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 226 transitions, 2708 flow [2024-06-27 17:55:25,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.714285714285715) internal successors, (138), 7 states have internal predecessors, (138), 0 states have call successors, (0), 0 states 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 17:55:25,755 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:25,755 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:25,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 17:55:25,755 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:55:25,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:25,755 INFO L85 PathProgramCache]: Analyzing trace with hash -1013164150, now seen corresponding path program 1 times [2024-06-27 17:55:25,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:25,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859088865] [2024-06-27 17:55:25,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:25,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:25,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:25,867 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 17:55:25,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:25,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859088865] [2024-06-27 17:55:25,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859088865] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:25,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:25,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:55:25,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239294871] [2024-06-27 17:55:25,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:25,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:55:25,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:25,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:55:25,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:55:25,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:55:25,912 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 226 transitions, 2708 flow. Second operand has 7 states, 7 states have (on average 19.714285714285715) internal successors, (138), 7 states have internal predecessors, (138), 0 states have call successors, (0), 0 states 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 17:55:25,912 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:25,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:55:25,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:26,513 INFO L124 PetriNetUnfolderBase]: 3060/5072 cut-off events. [2024-06-27 17:55:26,513 INFO L125 PetriNetUnfolderBase]: For 135688/135693 co-relation queries the response was YES. [2024-06-27 17:55:26,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28184 conditions, 5072 events. 3060/5072 cut-off events. For 135688/135693 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 33378 event pairs, 565 based on Foata normal form. 15/5045 useless extension candidates. Maximal degree in co-relation 28107. Up to 3272 conditions per place. [2024-06-27 17:55:26,557 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 159 selfloop transitions, 99 changer transitions 0/273 dead transitions. [2024-06-27 17:55:26,557 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 273 transitions, 3572 flow [2024-06-27 17:55:26,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:55:26,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:55:26,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 216 transitions. [2024-06-27 17:55:26,558 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6708074534161491 [2024-06-27 17:55:26,558 INFO L175 Difference]: Start difference. First operand has 169 places, 226 transitions, 2708 flow. Second operand 7 states and 216 transitions. [2024-06-27 17:55:26,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 273 transitions, 3572 flow [2024-06-27 17:55:26,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 273 transitions, 3365 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-27 17:55:26,761 INFO L231 Difference]: Finished difference. Result has 171 places, 228 transitions, 2771 flow [2024-06-27 17:55:26,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2501, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2771, PETRI_PLACES=171, PETRI_TRANSITIONS=228} [2024-06-27 17:55:26,762 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 121 predicate places. [2024-06-27 17:55:26,762 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 228 transitions, 2771 flow [2024-06-27 17:55:26,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.714285714285715) internal successors, (138), 7 states have internal predecessors, (138), 0 states have call successors, (0), 0 states 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 17:55:26,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:26,762 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:26,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 17:55:26,762 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:55:26,763 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:26,763 INFO L85 PathProgramCache]: Analyzing trace with hash 335323019, now seen corresponding path program 1 times [2024-06-27 17:55:26,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:26,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976702413] [2024-06-27 17:55:26,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:26,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:26,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:26,853 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 17:55:26,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:26,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976702413] [2024-06-27 17:55:26,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976702413] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:26,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:26,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:55:26,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715007971] [2024-06-27 17:55:26,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:26,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:55:26,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:26,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:55:26,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:55:26,898 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:55:26,898 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 228 transitions, 2771 flow. Second operand has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:26,898 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:26,898 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:55:26,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:27,398 INFO L124 PetriNetUnfolderBase]: 3082/5122 cut-off events. [2024-06-27 17:55:27,398 INFO L125 PetriNetUnfolderBase]: For 133279/133281 co-relation queries the response was YES. [2024-06-27 17:55:27,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28450 conditions, 5122 events. 3082/5122 cut-off events. For 133279/133281 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 33961 event pairs, 617 based on Foata normal form. 1/5077 useless extension candidates. Maximal degree in co-relation 28372. Up to 4222 conditions per place. [2024-06-27 17:55:27,442 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 215 selfloop transitions, 50 changer transitions 0/280 dead transitions. [2024-06-27 17:55:27,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 280 transitions, 3771 flow [2024-06-27 17:55:27,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:55:27,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:55:27,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 182 transitions. [2024-06-27 17:55:27,443 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6594202898550725 [2024-06-27 17:55:27,443 INFO L175 Difference]: Start difference. First operand has 171 places, 228 transitions, 2771 flow. Second operand 6 states and 182 transitions. [2024-06-27 17:55:27,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 280 transitions, 3771 flow [2024-06-27 17:55:27,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 280 transitions, 3634 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-27 17:55:27,648 INFO L231 Difference]: Finished difference. Result has 177 places, 246 transitions, 3008 flow [2024-06-27 17:55:27,648 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2634, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3008, PETRI_PLACES=177, PETRI_TRANSITIONS=246} [2024-06-27 17:55:27,649 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 127 predicate places. [2024-06-27 17:55:27,649 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 246 transitions, 3008 flow [2024-06-27 17:55:27,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:27,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:27,649 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:27,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 17:55:27,650 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:55:27,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:27,650 INFO L85 PathProgramCache]: Analyzing trace with hash 341036939, now seen corresponding path program 2 times [2024-06-27 17:55:27,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:27,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873099901] [2024-06-27 17:55:27,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:27,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:27,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:27,748 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 17:55:27,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:27,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873099901] [2024-06-27 17:55:27,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873099901] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:27,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:27,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:55:27,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094506754] [2024-06-27 17:55:27,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:27,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:55:27,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:27,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:55:27,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:55:27,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:55:27,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 246 transitions, 3008 flow. Second operand has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:27,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:27,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:55:27,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:28,411 INFO L124 PetriNetUnfolderBase]: 3126/5188 cut-off events. [2024-06-27 17:55:28,411 INFO L125 PetriNetUnfolderBase]: For 136651/136653 co-relation queries the response was YES. [2024-06-27 17:55:28,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29777 conditions, 5188 events. 3126/5188 cut-off events. For 136651/136653 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 34353 event pairs, 585 based on Foata normal form. 1/5148 useless extension candidates. Maximal degree in co-relation 29694. Up to 4468 conditions per place. [2024-06-27 17:55:28,452 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 236 selfloop transitions, 36 changer transitions 0/287 dead transitions. [2024-06-27 17:55:28,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 287 transitions, 3871 flow [2024-06-27 17:55:28,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:55:28,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:55:28,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 201 transitions. [2024-06-27 17:55:28,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6242236024844721 [2024-06-27 17:55:28,453 INFO L175 Difference]: Start difference. First operand has 177 places, 246 transitions, 3008 flow. Second operand 7 states and 201 transitions. [2024-06-27 17:55:28,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 287 transitions, 3871 flow [2024-06-27 17:55:28,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 287 transitions, 3801 flow, removed 35 selfloop flow, removed 0 redundant places. [2024-06-27 17:55:28,726 INFO L231 Difference]: Finished difference. Result has 185 places, 258 transitions, 3205 flow [2024-06-27 17:55:28,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2950, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3205, PETRI_PLACES=185, PETRI_TRANSITIONS=258} [2024-06-27 17:55:28,727 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 135 predicate places. [2024-06-27 17:55:28,727 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 258 transitions, 3205 flow [2024-06-27 17:55:28,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:28,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:28,728 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:28,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 17:55:28,728 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:55:28,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:28,728 INFO L85 PathProgramCache]: Analyzing trace with hash -373848484, now seen corresponding path program 6 times [2024-06-27 17:55:28,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:28,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735561848] [2024-06-27 17:55:28,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:28,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:28,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:28,834 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 17:55:28,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:28,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735561848] [2024-06-27 17:55:28,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735561848] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:28,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:28,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:55:28,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420941559] [2024-06-27 17:55:28,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:28,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:55:28,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:28,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:55:28,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:55:28,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:55:28,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 258 transitions, 3205 flow. Second operand has 7 states, 7 states have (on average 19.714285714285715) internal successors, (138), 7 states have internal predecessors, (138), 0 states have call successors, (0), 0 states 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 17:55:28,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:28,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:55:28,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:29,467 INFO L124 PetriNetUnfolderBase]: 3164/5257 cut-off events. [2024-06-27 17:55:29,467 INFO L125 PetriNetUnfolderBase]: For 155429/155437 co-relation queries the response was YES. [2024-06-27 17:55:29,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30343 conditions, 5257 events. 3164/5257 cut-off events. For 155429/155437 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 35171 event pairs, 619 based on Foata normal form. 22/5219 useless extension candidates. Maximal degree in co-relation 30256. Up to 4101 conditions per place. [2024-06-27 17:55:29,512 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 188 selfloop transitions, 94 changer transitions 0/297 dead transitions. [2024-06-27 17:55:29,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 297 transitions, 3927 flow [2024-06-27 17:55:29,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:55:29,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:55:29,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 208 transitions. [2024-06-27 17:55:29,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6459627329192547 [2024-06-27 17:55:29,513 INFO L175 Difference]: Start difference. First operand has 185 places, 258 transitions, 3205 flow. Second operand 7 states and 208 transitions. [2024-06-27 17:55:29,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 297 transitions, 3927 flow [2024-06-27 17:55:29,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 297 transitions, 3829 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-27 17:55:29,904 INFO L231 Difference]: Finished difference. Result has 188 places, 259 transitions, 3340 flow [2024-06-27 17:55:29,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3107, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3340, PETRI_PLACES=188, PETRI_TRANSITIONS=259} [2024-06-27 17:55:29,905 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 138 predicate places. [2024-06-27 17:55:29,905 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 259 transitions, 3340 flow [2024-06-27 17:55:29,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.714285714285715) internal successors, (138), 7 states have internal predecessors, (138), 0 states have call successors, (0), 0 states 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 17:55:29,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:29,906 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:29,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 17:55:29,906 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:55:29,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:29,907 INFO L85 PathProgramCache]: Analyzing trace with hash -1711271606, now seen corresponding path program 7 times [2024-06-27 17:55:29,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:29,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020141927] [2024-06-27 17:55:29,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:29,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:29,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:30,034 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 17:55:30,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:30,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020141927] [2024-06-27 17:55:30,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020141927] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:30,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:30,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:55:30,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95285457] [2024-06-27 17:55:30,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:30,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:55:30,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:30,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:55:30,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:55:30,076 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:55:30,076 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 259 transitions, 3340 flow. Second operand has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states 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 17:55:30,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:30,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:55:30,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:30,847 INFO L124 PetriNetUnfolderBase]: 3135/5185 cut-off events. [2024-06-27 17:55:30,847 INFO L125 PetriNetUnfolderBase]: For 151899/151899 co-relation queries the response was YES. [2024-06-27 17:55:30,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29998 conditions, 5185 events. 3135/5185 cut-off events. For 151899/151899 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 34388 event pairs, 607 based on Foata normal form. 16/5133 useless extension candidates. Maximal degree in co-relation 29911. Up to 4045 conditions per place. [2024-06-27 17:55:30,897 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 191 selfloop transitions, 97 changer transitions 0/303 dead transitions. [2024-06-27 17:55:30,897 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 303 transitions, 4058 flow [2024-06-27 17:55:30,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:55:30,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:55:30,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 235 transitions. [2024-06-27 17:55:30,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6385869565217391 [2024-06-27 17:55:30,899 INFO L175 Difference]: Start difference. First operand has 188 places, 259 transitions, 3340 flow. Second operand 8 states and 235 transitions. [2024-06-27 17:55:30,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 303 transitions, 4058 flow [2024-06-27 17:55:31,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 303 transitions, 3833 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-27 17:55:31,248 INFO L231 Difference]: Finished difference. Result has 191 places, 259 transitions, 3320 flow [2024-06-27 17:55:31,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3115, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3320, PETRI_PLACES=191, PETRI_TRANSITIONS=259} [2024-06-27 17:55:31,249 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 141 predicate places. [2024-06-27 17:55:31,249 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 259 transitions, 3320 flow [2024-06-27 17:55:31,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states 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 17:55:31,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:31,250 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:31,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 17:55:31,250 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:55:31,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:31,251 INFO L85 PathProgramCache]: Analyzing trace with hash 2037814914, now seen corresponding path program 8 times [2024-06-27 17:55:31,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:31,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766017047] [2024-06-27 17:55:31,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:31,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:31,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:31,362 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 17:55:31,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:31,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766017047] [2024-06-27 17:55:31,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766017047] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:31,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:31,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:55:31,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117086663] [2024-06-27 17:55:31,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:31,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:55:31,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:31,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:55:31,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:55:31,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:55:31,409 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 259 transitions, 3320 flow. Second operand has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states 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 17:55:31,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:31,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:55:31,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:32,199 INFO L124 PetriNetUnfolderBase]: 3167/5282 cut-off events. [2024-06-27 17:55:32,199 INFO L125 PetriNetUnfolderBase]: For 148010/148010 co-relation queries the response was YES. [2024-06-27 17:55:32,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29759 conditions, 5282 events. 3167/5282 cut-off events. For 148010/148010 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 35471 event pairs, 774 based on Foata normal form. 12/5218 useless extension candidates. Maximal degree in co-relation 29671. Up to 3969 conditions per place. [2024-06-27 17:55:32,241 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 198 selfloop transitions, 100 changer transitions 0/313 dead transitions. [2024-06-27 17:55:32,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 313 transitions, 4124 flow [2024-06-27 17:55:32,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:55:32,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:55:32,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 264 transitions. [2024-06-27 17:55:32,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6376811594202898 [2024-06-27 17:55:32,242 INFO L175 Difference]: Start difference. First operand has 191 places, 259 transitions, 3320 flow. Second operand 9 states and 264 transitions. [2024-06-27 17:55:32,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 313 transitions, 4124 flow [2024-06-27 17:55:32,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 313 transitions, 3929 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-27 17:55:32,520 INFO L231 Difference]: Finished difference. Result has 194 places, 260 transitions, 3369 flow [2024-06-27 17:55:32,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3125, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3369, PETRI_PLACES=194, PETRI_TRANSITIONS=260} [2024-06-27 17:55:32,520 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 144 predicate places. [2024-06-27 17:55:32,520 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 260 transitions, 3369 flow [2024-06-27 17:55:32,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states 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 17:55:32,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:32,521 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:32,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 17:55:32,521 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:55:32,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:32,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1372700360, now seen corresponding path program 2 times [2024-06-27 17:55:32,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:32,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401869009] [2024-06-27 17:55:32,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:32,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:32,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:32,627 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 17:55:32,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:32,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401869009] [2024-06-27 17:55:32,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401869009] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:32,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:32,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:55:32,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282520370] [2024-06-27 17:55:32,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:32,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:55:32,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:32,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:55:32,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:55:32,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:55:32,664 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 260 transitions, 3369 flow. Second operand has 7 states, 7 states have (on average 19.714285714285715) internal successors, (138), 7 states have internal predecessors, (138), 0 states have call successors, (0), 0 states 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 17:55:32,664 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:32,664 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:55:32,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:33,316 INFO L124 PetriNetUnfolderBase]: 3235/5512 cut-off events. [2024-06-27 17:55:33,316 INFO L125 PetriNetUnfolderBase]: For 157686/157694 co-relation queries the response was YES. [2024-06-27 17:55:33,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30721 conditions, 5512 events. 3235/5512 cut-off events. For 157686/157694 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 37987 event pairs, 999 based on Foata normal form. 18/5427 useless extension candidates. Maximal degree in co-relation 30632. Up to 4090 conditions per place. [2024-06-27 17:55:33,367 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 192 selfloop transitions, 95 changer transitions 0/302 dead transitions. [2024-06-27 17:55:33,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 302 transitions, 4117 flow [2024-06-27 17:55:33,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:55:33,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:55:33,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 211 transitions. [2024-06-27 17:55:33,370 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65527950310559 [2024-06-27 17:55:33,370 INFO L175 Difference]: Start difference. First operand has 194 places, 260 transitions, 3369 flow. Second operand 7 states and 211 transitions. [2024-06-27 17:55:33,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 302 transitions, 4117 flow [2024-06-27 17:55:33,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 302 transitions, 3887 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-27 17:55:33,701 INFO L231 Difference]: Finished difference. Result has 194 places, 261 transitions, 3375 flow [2024-06-27 17:55:33,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3139, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3375, PETRI_PLACES=194, PETRI_TRANSITIONS=261} [2024-06-27 17:55:33,701 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 144 predicate places. [2024-06-27 17:55:33,701 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 261 transitions, 3375 flow [2024-06-27 17:55:33,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.714285714285715) internal successors, (138), 7 states have internal predecessors, (138), 0 states have call successors, (0), 0 states 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 17:55:33,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:33,702 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:33,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 17:55:33,702 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:55:33,702 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:33,703 INFO L85 PathProgramCache]: Analyzing trace with hash 741369542, now seen corresponding path program 3 times [2024-06-27 17:55:33,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:33,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529808667] [2024-06-27 17:55:33,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:33,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:33,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:33,801 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 17:55:33,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:33,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529808667] [2024-06-27 17:55:33,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529808667] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:33,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:33,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:55:33,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304891606] [2024-06-27 17:55:33,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:33,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:55:33,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:33,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:55:33,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:55:33,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:55:33,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 261 transitions, 3375 flow. Second operand has 7 states, 7 states have (on average 19.714285714285715) internal successors, (138), 7 states have internal predecessors, (138), 0 states have call successors, (0), 0 states 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 17:55:33,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:33,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:55:33,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:34,539 INFO L124 PetriNetUnfolderBase]: 3215/5436 cut-off events. [2024-06-27 17:55:34,540 INFO L125 PetriNetUnfolderBase]: For 148809/148817 co-relation queries the response was YES. [2024-06-27 17:55:34,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29725 conditions, 5436 events. 3215/5436 cut-off events. For 148809/148817 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 37219 event pairs, 826 based on Foata normal form. 18/5364 useless extension candidates. Maximal degree in co-relation 29635. Up to 3120 conditions per place. [2024-06-27 17:55:34,583 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 183 selfloop transitions, 104 changer transitions 0/302 dead transitions. [2024-06-27 17:55:34,583 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 302 transitions, 4011 flow [2024-06-27 17:55:34,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:55:34,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:55:34,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 210 transitions. [2024-06-27 17:55:34,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6521739130434783 [2024-06-27 17:55:34,584 INFO L175 Difference]: Start difference. First operand has 194 places, 261 transitions, 3375 flow. Second operand 7 states and 210 transitions. [2024-06-27 17:55:34,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 302 transitions, 4011 flow [2024-06-27 17:55:34,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 302 transitions, 3819 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-27 17:55:34,931 INFO L231 Difference]: Finished difference. Result has 195 places, 260 transitions, 3321 flow [2024-06-27 17:55:34,932 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3109, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3321, PETRI_PLACES=195, PETRI_TRANSITIONS=260} [2024-06-27 17:55:34,932 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 145 predicate places. [2024-06-27 17:55:34,932 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 260 transitions, 3321 flow [2024-06-27 17:55:34,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.714285714285715) internal successors, (138), 7 states have internal predecessors, (138), 0 states have call successors, (0), 0 states 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 17:55:34,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:34,932 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:34,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 17:55:34,933 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:55:34,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:34,933 INFO L85 PathProgramCache]: Analyzing trace with hash 627954955, now seen corresponding path program 3 times [2024-06-27 17:55:34,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:34,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636818033] [2024-06-27 17:55:34,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:34,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:34,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:35,024 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 17:55:35,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:35,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636818033] [2024-06-27 17:55:35,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636818033] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:35,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:35,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:55:35,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237349040] [2024-06-27 17:55:35,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:35,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:55:35,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:35,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:55:35,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:55:35,053 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:55:35,053 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 260 transitions, 3321 flow. Second operand has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:35,053 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:35,053 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:55:35,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:35,631 INFO L124 PetriNetUnfolderBase]: 3226/5446 cut-off events. [2024-06-27 17:55:35,631 INFO L125 PetriNetUnfolderBase]: For 137619/137619 co-relation queries the response was YES. [2024-06-27 17:55:35,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29677 conditions, 5446 events. 3226/5446 cut-off events. For 137619/137619 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 37044 event pairs, 652 based on Foata normal form. 1/5392 useless extension candidates. Maximal degree in co-relation 29586. Up to 4433 conditions per place. [2024-06-27 17:55:35,679 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 220 selfloop transitions, 64 changer transitions 0/299 dead transitions. [2024-06-27 17:55:35,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 299 transitions, 4396 flow [2024-06-27 17:55:35,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:55:35,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:55:35,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 178 transitions. [2024-06-27 17:55:35,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.644927536231884 [2024-06-27 17:55:35,680 INFO L175 Difference]: Start difference. First operand has 195 places, 260 transitions, 3321 flow. Second operand 6 states and 178 transitions. [2024-06-27 17:55:35,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 299 transitions, 4396 flow [2024-06-27 17:55:36,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 299 transitions, 4096 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-27 17:55:36,030 INFO L231 Difference]: Finished difference. Result has 196 places, 269 transitions, 3328 flow [2024-06-27 17:55:36,030 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3021, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3328, PETRI_PLACES=196, PETRI_TRANSITIONS=269} [2024-06-27 17:55:36,030 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 146 predicate places. [2024-06-27 17:55:36,031 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 269 transitions, 3328 flow [2024-06-27 17:55:36,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:36,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:36,031 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:36,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 17:55:36,031 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:55:36,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:36,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1835974773, now seen corresponding path program 4 times [2024-06-27 17:55:36,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:36,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347474386] [2024-06-27 17:55:36,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:36,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:36,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:36,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:55:36,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:36,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347474386] [2024-06-27 17:55:36,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347474386] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:36,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:36,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:55:36,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593860110] [2024-06-27 17:55:36,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:36,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:55:36,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:36,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:55:36,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:55:36,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:55:36,152 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 269 transitions, 3328 flow. Second operand has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:36,152 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:36,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:55:36,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:36,740 INFO L124 PetriNetUnfolderBase]: 3237/5388 cut-off events. [2024-06-27 17:55:36,740 INFO L125 PetriNetUnfolderBase]: For 135245/135245 co-relation queries the response was YES. [2024-06-27 17:55:36,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28719 conditions, 5388 events. 3237/5388 cut-off events. For 135245/135245 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 36280 event pairs, 625 based on Foata normal form. 1/5334 useless extension candidates. Maximal degree in co-relation 28627. Up to 4441 conditions per place. [2024-06-27 17:55:36,784 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 215 selfloop transitions, 69 changer transitions 0/299 dead transitions. [2024-06-27 17:55:36,784 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 299 transitions, 4236 flow [2024-06-27 17:55:36,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:55:36,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:55:36,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 174 transitions. [2024-06-27 17:55:36,785 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6304347826086957 [2024-06-27 17:55:36,785 INFO L175 Difference]: Start difference. First operand has 196 places, 269 transitions, 3328 flow. Second operand 6 states and 174 transitions. [2024-06-27 17:55:36,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 299 transitions, 4236 flow [2024-06-27 17:55:37,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 299 transitions, 4135 flow, removed 43 selfloop flow, removed 1 redundant places. [2024-06-27 17:55:37,193 INFO L231 Difference]: Finished difference. Result has 201 places, 273 transitions, 3447 flow [2024-06-27 17:55:37,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3245, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3447, PETRI_PLACES=201, PETRI_TRANSITIONS=273} [2024-06-27 17:55:37,194 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 151 predicate places. [2024-06-27 17:55:37,194 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 273 transitions, 3447 flow [2024-06-27 17:55:37,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:37,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:37,194 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:37,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 17:55:37,195 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:55:37,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:37,195 INFO L85 PathProgramCache]: Analyzing trace with hash -837882067, now seen corresponding path program 5 times [2024-06-27 17:55:37,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:37,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148745469] [2024-06-27 17:55:37,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:37,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:37,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:37,290 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 17:55:37,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:37,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148745469] [2024-06-27 17:55:37,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148745469] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:37,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:37,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:55:37,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075943388] [2024-06-27 17:55:37,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:37,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:55:37,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:37,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:55:37,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:55:37,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:55:37,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 273 transitions, 3447 flow. Second operand has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:37,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:37,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:55:37,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:37,910 INFO L124 PetriNetUnfolderBase]: 3245/5394 cut-off events. [2024-06-27 17:55:37,910 INFO L125 PetriNetUnfolderBase]: For 138146/138146 co-relation queries the response was YES. [2024-06-27 17:55:37,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28945 conditions, 5394 events. 3245/5394 cut-off events. For 138146/138146 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 36269 event pairs, 594 based on Foata normal form. 1/5343 useless extension candidates. Maximal degree in co-relation 28851. Up to 4409 conditions per place. [2024-06-27 17:55:37,963 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 198 selfloop transitions, 96 changer transitions 0/309 dead transitions. [2024-06-27 17:55:37,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 309 transitions, 4391 flow [2024-06-27 17:55:37,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:55:37,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:55:37,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 184 transitions. [2024-06-27 17:55:37,965 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-27 17:55:37,965 INFO L175 Difference]: Start difference. First operand has 201 places, 273 transitions, 3447 flow. Second operand 6 states and 184 transitions. [2024-06-27 17:55:37,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 309 transitions, 4391 flow [2024-06-27 17:55:38,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 309 transitions, 4229 flow, removed 32 selfloop flow, removed 2 redundant places. [2024-06-27 17:55:38,492 INFO L231 Difference]: Finished difference. Result has 206 places, 277 transitions, 3616 flow [2024-06-27 17:55:38,492 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3293, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3616, PETRI_PLACES=206, PETRI_TRANSITIONS=277} [2024-06-27 17:55:38,493 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 156 predicate places. [2024-06-27 17:55:38,493 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 277 transitions, 3616 flow [2024-06-27 17:55:38,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:38,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:38,493 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:38,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 17:55:38,493 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:55:38,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:38,493 INFO L85 PathProgramCache]: Analyzing trace with hash -844548307, now seen corresponding path program 6 times [2024-06-27 17:55:38,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:38,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319541867] [2024-06-27 17:55:38,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:38,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:38,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:38,584 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 17:55:38,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:38,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319541867] [2024-06-27 17:55:38,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319541867] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:38,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:38,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:55:38,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607328302] [2024-06-27 17:55:38,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:38,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:55:38,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:38,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:55:38,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:55:38,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:55:38,621 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 277 transitions, 3616 flow. Second operand has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:38,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:38,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:55:38,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:39,345 INFO L124 PetriNetUnfolderBase]: 3242/5393 cut-off events. [2024-06-27 17:55:39,345 INFO L125 PetriNetUnfolderBase]: For 142188/142190 co-relation queries the response was YES. [2024-06-27 17:55:39,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29329 conditions, 5393 events. 3242/5393 cut-off events. For 142188/142190 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 36284 event pairs, 572 based on Foata normal form. 1/5353 useless extension candidates. Maximal degree in co-relation 29233. Up to 4407 conditions per place. [2024-06-27 17:55:39,400 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 206 selfloop transitions, 95 changer transitions 0/316 dead transitions. [2024-06-27 17:55:39,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 316 transitions, 4432 flow [2024-06-27 17:55:39,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:55:39,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:55:39,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 213 transitions. [2024-06-27 17:55:39,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6614906832298136 [2024-06-27 17:55:39,402 INFO L175 Difference]: Start difference. First operand has 206 places, 277 transitions, 3616 flow. Second operand 7 states and 213 transitions. [2024-06-27 17:55:39,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 316 transitions, 4432 flow [2024-06-27 17:55:39,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 316 transitions, 4290 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-27 17:55:39,723 INFO L231 Difference]: Finished difference. Result has 210 places, 277 transitions, 3696 flow [2024-06-27 17:55:39,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3474, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3696, PETRI_PLACES=210, PETRI_TRANSITIONS=277} [2024-06-27 17:55:39,724 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 160 predicate places. [2024-06-27 17:55:39,724 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 277 transitions, 3696 flow [2024-06-27 17:55:39,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:39,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:39,724 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:39,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 17:55:39,725 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:55:39,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:39,725 INFO L85 PathProgramCache]: Analyzing trace with hash -754061930, now seen corresponding path program 1 times [2024-06-27 17:55:39,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:39,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538316761] [2024-06-27 17:55:39,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:39,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:39,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:39,813 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 17:55:39,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:39,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538316761] [2024-06-27 17:55:39,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538316761] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:39,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:39,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:55:39,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708911039] [2024-06-27 17:55:39,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:39,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:55:39,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:39,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:55:39,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:55:39,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:55:39,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 277 transitions, 3696 flow. Second operand has 6 states, 6 states have (on average 20.333333333333332) internal successors, (122), 6 states have internal predecessors, (122), 0 states have call successors, (0), 0 states 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 17:55:39,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:39,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:55:39,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:40,521 INFO L124 PetriNetUnfolderBase]: 3287/5483 cut-off events. [2024-06-27 17:55:40,522 INFO L125 PetriNetUnfolderBase]: For 153330/153333 co-relation queries the response was YES. [2024-06-27 17:55:40,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30201 conditions, 5483 events. 3287/5483 cut-off events. For 153330/153333 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 37159 event pairs, 612 based on Foata normal form. 4/5435 useless extension candidates. Maximal degree in co-relation 30104. Up to 4496 conditions per place. [2024-06-27 17:55:40,575 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 222 selfloop transitions, 80 changer transitions 0/317 dead transitions. [2024-06-27 17:55:40,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 317 transitions, 4743 flow [2024-06-27 17:55:40,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:55:40,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:55:40,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 181 transitions. [2024-06-27 17:55:40,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6557971014492754 [2024-06-27 17:55:40,576 INFO L175 Difference]: Start difference. First operand has 210 places, 277 transitions, 3696 flow. Second operand 6 states and 181 transitions. [2024-06-27 17:55:40,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 317 transitions, 4743 flow [2024-06-27 17:55:40,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 317 transitions, 4611 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-27 17:55:40,960 INFO L231 Difference]: Finished difference. Result has 213 places, 286 transitions, 3887 flow [2024-06-27 17:55:40,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3571, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3887, PETRI_PLACES=213, PETRI_TRANSITIONS=286} [2024-06-27 17:55:40,960 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 163 predicate places. [2024-06-27 17:55:40,961 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 286 transitions, 3887 flow [2024-06-27 17:55:40,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.333333333333332) internal successors, (122), 6 states have internal predecessors, (122), 0 states have call successors, (0), 0 states 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 17:55:40,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:40,962 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:40,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 17:55:40,962 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:55:40,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:40,962 INFO L85 PathProgramCache]: Analyzing trace with hash -753941774, now seen corresponding path program 1 times [2024-06-27 17:55:40,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:40,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980651379] [2024-06-27 17:55:40,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:40,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:40,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:41,044 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 17:55:41,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:41,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980651379] [2024-06-27 17:55:41,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980651379] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:41,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:41,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:55:41,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254783464] [2024-06-27 17:55:41,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:41,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:55:41,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:41,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:55:41,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:55:41,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:55:41,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 286 transitions, 3887 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states 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 17:55:41,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:41,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:55:41,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:41,814 INFO L124 PetriNetUnfolderBase]: 3309/5513 cut-off events. [2024-06-27 17:55:41,815 INFO L125 PetriNetUnfolderBase]: For 156462/156464 co-relation queries the response was YES. [2024-06-27 17:55:41,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30454 conditions, 5513 events. 3309/5513 cut-off events. For 156462/156464 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 37283 event pairs, 626 based on Foata normal form. 1/5455 useless extension candidates. Maximal degree in co-relation 30355. Up to 4339 conditions per place. [2024-06-27 17:55:41,854 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 232 selfloop transitions, 89 changer transitions 0/336 dead transitions. [2024-06-27 17:55:41,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 336 transitions, 5019 flow [2024-06-27 17:55:41,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:55:41,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:55:41,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 208 transitions. [2024-06-27 17:55:41,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6459627329192547 [2024-06-27 17:55:41,855 INFO L175 Difference]: Start difference. First operand has 213 places, 286 transitions, 3887 flow. Second operand 7 states and 208 transitions. [2024-06-27 17:55:41,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 336 transitions, 5019 flow [2024-06-27 17:55:42,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 336 transitions, 4896 flow, removed 23 selfloop flow, removed 2 redundant places. [2024-06-27 17:55:42,268 INFO L231 Difference]: Finished difference. Result has 220 places, 301 transitions, 4216 flow [2024-06-27 17:55:42,268 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3764, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4216, PETRI_PLACES=220, PETRI_TRANSITIONS=301} [2024-06-27 17:55:42,269 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 170 predicate places. [2024-06-27 17:55:42,269 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 301 transitions, 4216 flow [2024-06-27 17:55:42,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states 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 17:55:42,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:42,269 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:42,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-27 17:55:42,269 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:55:42,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:42,269 INFO L85 PathProgramCache]: Analyzing trace with hash 993472284, now seen corresponding path program 2 times [2024-06-27 17:55:42,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:42,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113158940] [2024-06-27 17:55:42,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:42,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:42,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:42,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:55:42,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:42,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113158940] [2024-06-27 17:55:42,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113158940] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:42,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:42,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:55:42,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319909764] [2024-06-27 17:55:42,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:42,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:55:42,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:42,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:55:42,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:55:42,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:55:42,411 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 301 transitions, 4216 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states 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 17:55:42,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:42,411 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:55:42,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:43,048 INFO L124 PetriNetUnfolderBase]: 3320/5532 cut-off events. [2024-06-27 17:55:43,048 INFO L125 PetriNetUnfolderBase]: For 167123/167125 co-relation queries the response was YES. [2024-06-27 17:55:43,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31665 conditions, 5532 events. 3320/5532 cut-off events. For 167123/167125 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 37464 event pairs, 610 based on Foata normal form. 1/5482 useless extension candidates. Maximal degree in co-relation 31563. Up to 4540 conditions per place. [2024-06-27 17:55:43,102 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 242 selfloop transitions, 80 changer transitions 0/337 dead transitions. [2024-06-27 17:55:43,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 337 transitions, 5108 flow [2024-06-27 17:55:43,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:55:43,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:55:43,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 204 transitions. [2024-06-27 17:55:43,103 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6335403726708074 [2024-06-27 17:55:43,103 INFO L175 Difference]: Start difference. First operand has 220 places, 301 transitions, 4216 flow. Second operand 7 states and 204 transitions. [2024-06-27 17:55:43,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 337 transitions, 5108 flow [2024-06-27 17:55:43,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 337 transitions, 5020 flow, removed 27 selfloop flow, removed 2 redundant places. [2024-06-27 17:55:43,585 INFO L231 Difference]: Finished difference. Result has 225 places, 304 transitions, 4344 flow [2024-06-27 17:55:43,585 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4128, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4344, PETRI_PLACES=225, PETRI_TRANSITIONS=304} [2024-06-27 17:55:43,586 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 175 predicate places. [2024-06-27 17:55:43,586 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 304 transitions, 4344 flow [2024-06-27 17:55:43,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states 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 17:55:43,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:43,586 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:43,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-27 17:55:43,587 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:55:43,587 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:43,587 INFO L85 PathProgramCache]: Analyzing trace with hash 953197980, now seen corresponding path program 2 times [2024-06-27 17:55:43,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:43,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84144312] [2024-06-27 17:55:43,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:43,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:43,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:43,688 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 17:55:43,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:43,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84144312] [2024-06-27 17:55:43,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84144312] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:43,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:43,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:55:43,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043283188] [2024-06-27 17:55:43,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:43,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:55:43,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:43,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:55:43,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:55:43,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:55:43,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 304 transitions, 4344 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states 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 17:55:43,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:43,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:55:43,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:44,433 INFO L124 PetriNetUnfolderBase]: 3395/5645 cut-off events. [2024-06-27 17:55:44,433 INFO L125 PetriNetUnfolderBase]: For 178690/178692 co-relation queries the response was YES. [2024-06-27 17:55:44,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32864 conditions, 5645 events. 3395/5645 cut-off events. For 178690/178692 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 38264 event pairs, 577 based on Foata normal form. 2/5600 useless extension candidates. Maximal degree in co-relation 32760. Up to 4745 conditions per place. [2024-06-27 17:55:44,485 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 280 selfloop transitions, 63 changer transitions 0/358 dead transitions. [2024-06-27 17:55:44,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 358 transitions, 5627 flow [2024-06-27 17:55:44,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:55:44,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:55:44,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 255 transitions. [2024-06-27 17:55:44,486 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6159420289855072 [2024-06-27 17:55:44,486 INFO L175 Difference]: Start difference. First operand has 225 places, 304 transitions, 4344 flow. Second operand 9 states and 255 transitions. [2024-06-27 17:55:44,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 358 transitions, 5627 flow [2024-06-27 17:55:44,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 358 transitions, 5460 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-27 17:55:44,999 INFO L231 Difference]: Finished difference. Result has 231 places, 318 transitions, 4540 flow [2024-06-27 17:55:45,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4179, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4540, PETRI_PLACES=231, PETRI_TRANSITIONS=318} [2024-06-27 17:55:45,000 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 181 predicate places. [2024-06-27 17:55:45,001 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 318 transitions, 4540 flow [2024-06-27 17:55:45,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states 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 17:55:45,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:45,001 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:45,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-27 17:55:45,001 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:55:45,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:45,002 INFO L85 PathProgramCache]: Analyzing trace with hash -576810254, now seen corresponding path program 3 times [2024-06-27 17:55:45,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:45,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981919669] [2024-06-27 17:55:45,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:45,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:45,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:45,114 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 17:55:45,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:45,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981919669] [2024-06-27 17:55:45,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981919669] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:45,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:45,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:55:45,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804706742] [2024-06-27 17:55:45,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:45,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:55:45,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:45,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:55:45,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:55:45,154 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:55:45,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 318 transitions, 4540 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states 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 17:55:45,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:45,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:55:45,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:45,863 INFO L124 PetriNetUnfolderBase]: 3389/5629 cut-off events. [2024-06-27 17:55:45,863 INFO L125 PetriNetUnfolderBase]: For 183314/183316 co-relation queries the response was YES. [2024-06-27 17:55:45,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33362 conditions, 5629 events. 3389/5629 cut-off events. For 183314/183316 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 38051 event pairs, 576 based on Foata normal form. 2/5582 useless extension candidates. Maximal degree in co-relation 33256. Up to 4741 conditions per place. [2024-06-27 17:55:45,918 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 276 selfloop transitions, 65 changer transitions 0/356 dead transitions. [2024-06-27 17:55:45,918 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 356 transitions, 5550 flow [2024-06-27 17:55:45,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:55:45,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:55:45,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 230 transitions. [2024-06-27 17:55:45,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-27 17:55:45,919 INFO L175 Difference]: Start difference. First operand has 231 places, 318 transitions, 4540 flow. Second operand 8 states and 230 transitions. [2024-06-27 17:55:45,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 356 transitions, 5550 flow [2024-06-27 17:55:46,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 356 transitions, 5385 flow, removed 57 selfloop flow, removed 4 redundant places. [2024-06-27 17:55:46,337 INFO L231 Difference]: Finished difference. Result has 235 places, 322 transitions, 4611 flow [2024-06-27 17:55:46,337 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4383, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4611, PETRI_PLACES=235, PETRI_TRANSITIONS=322} [2024-06-27 17:55:46,337 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 185 predicate places. [2024-06-27 17:55:46,338 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 322 transitions, 4611 flow [2024-06-27 17:55:46,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states 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 17:55:46,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:46,338 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:46,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-27 17:55:46,338 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:55:46,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:46,339 INFO L85 PathProgramCache]: Analyzing trace with hash 65213602, now seen corresponding path program 3 times [2024-06-27 17:55:46,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:46,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849388130] [2024-06-27 17:55:46,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:46,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:46,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:46,434 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 17:55:46,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:46,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849388130] [2024-06-27 17:55:46,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849388130] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:46,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:46,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:55:46,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175469680] [2024-06-27 17:55:46,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:46,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:55:46,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:46,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:55:46,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:55:46,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:55:46,467 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 322 transitions, 4611 flow. Second operand has 6 states, 6 states have (on average 20.333333333333332) internal successors, (122), 6 states have internal predecessors, (122), 0 states have call successors, (0), 0 states 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 17:55:46,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:46,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:55:46,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:47,149 INFO L124 PetriNetUnfolderBase]: 3386/5633 cut-off events. [2024-06-27 17:55:47,149 INFO L125 PetriNetUnfolderBase]: For 186949/186951 co-relation queries the response was YES. [2024-06-27 17:55:47,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33525 conditions, 5633 events. 3386/5633 cut-off events. For 186949/186951 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 38217 event pairs, 575 based on Foata normal form. 1/5586 useless extension candidates. Maximal degree in co-relation 33417. Up to 4856 conditions per place. [2024-06-27 17:55:47,201 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 299 selfloop transitions, 36 changer transitions 0/350 dead transitions. [2024-06-27 17:55:47,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 350 transitions, 5369 flow [2024-06-27 17:55:47,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:55:47,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:55:47,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 199 transitions. [2024-06-27 17:55:47,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6180124223602484 [2024-06-27 17:55:47,202 INFO L175 Difference]: Start difference. First operand has 235 places, 322 transitions, 4611 flow. Second operand 7 states and 199 transitions. [2024-06-27 17:55:47,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 350 transitions, 5369 flow [2024-06-27 17:55:47,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 350 transitions, 5181 flow, removed 41 selfloop flow, removed 5 redundant places. [2024-06-27 17:55:47,657 INFO L231 Difference]: Finished difference. Result has 237 places, 322 transitions, 4505 flow [2024-06-27 17:55:47,658 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4423, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4505, PETRI_PLACES=237, PETRI_TRANSITIONS=322} [2024-06-27 17:55:47,658 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 187 predicate places. [2024-06-27 17:55:47,658 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 322 transitions, 4505 flow [2024-06-27 17:55:47,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.333333333333332) internal successors, (122), 6 states have internal predecessors, (122), 0 states have call successors, (0), 0 states 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 17:55:47,658 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:47,658 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:47,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-27 17:55:47,659 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:55:47,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:47,659 INFO L85 PathProgramCache]: Analyzing trace with hash 953206908, now seen corresponding path program 1 times [2024-06-27 17:55:47,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:47,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841589565] [2024-06-27 17:55:47,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:47,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:47,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:47,760 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 17:55:47,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:47,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841589565] [2024-06-27 17:55:47,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841589565] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:47,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:47,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:55:47,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338383664] [2024-06-27 17:55:47,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:47,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:55:47,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:47,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:55:47,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:55:47,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 46 [2024-06-27 17:55:47,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 322 transitions, 4505 flow. Second operand has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:47,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:47,818 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 46 [2024-06-27 17:55:47,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:48,496 INFO L124 PetriNetUnfolderBase]: 3310/5703 cut-off events. [2024-06-27 17:55:48,497 INFO L125 PetriNetUnfolderBase]: For 205971/205983 co-relation queries the response was YES. [2024-06-27 17:55:48,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32878 conditions, 5703 events. 3310/5703 cut-off events. For 205971/205983 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 40166 event pairs, 1009 based on Foata normal form. 16/5603 useless extension candidates. Maximal degree in co-relation 32769. Up to 4506 conditions per place. [2024-06-27 17:55:48,552 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 265 selfloop transitions, 40 changer transitions 0/354 dead transitions. [2024-06-27 17:55:48,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 354 transitions, 5227 flow [2024-06-27 17:55:48,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:55:48,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:55:48,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 205 transitions. [2024-06-27 17:55:48,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6366459627329193 [2024-06-27 17:55:48,553 INFO L175 Difference]: Start difference. First operand has 237 places, 322 transitions, 4505 flow. Second operand 7 states and 205 transitions. [2024-06-27 17:55:48,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 354 transitions, 5227 flow [2024-06-27 17:55:49,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 354 transitions, 5161 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 17:55:49,137 INFO L231 Difference]: Finished difference. Result has 238 places, 323 transitions, 4539 flow [2024-06-27 17:55:49,137 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4439, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4539, PETRI_PLACES=238, PETRI_TRANSITIONS=323} [2024-06-27 17:55:49,138 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 188 predicate places. [2024-06-27 17:55:49,138 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 323 transitions, 4539 flow [2024-06-27 17:55:49,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:49,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:49,138 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:49,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-27 17:55:49,138 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:55:49,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:49,139 INFO L85 PathProgramCache]: Analyzing trace with hash 1667819338, now seen corresponding path program 4 times [2024-06-27 17:55:49,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:49,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918100680] [2024-06-27 17:55:49,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:49,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:49,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:49,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:55:49,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:49,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918100680] [2024-06-27 17:55:49,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918100680] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:49,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:49,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:55:49,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14322274] [2024-06-27 17:55:49,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:49,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:55:49,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:49,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:55:49,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:55:49,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:55:49,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 323 transitions, 4539 flow. Second operand has 6 states, 6 states have (on average 20.333333333333332) internal successors, (122), 6 states have internal predecessors, (122), 0 states have call successors, (0), 0 states 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 17:55:49,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:49,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:55:49,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:49,989 INFO L124 PetriNetUnfolderBase]: 3482/5795 cut-off events. [2024-06-27 17:55:49,989 INFO L125 PetriNetUnfolderBase]: For 202840/202848 co-relation queries the response was YES. [2024-06-27 17:55:50,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34353 conditions, 5795 events. 3482/5795 cut-off events. For 202840/202848 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 39704 event pairs, 645 based on Foata normal form. 7/5743 useless extension candidates. Maximal degree in co-relation 34243. Up to 4769 conditions per place. [2024-06-27 17:55:50,056 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 257 selfloop transitions, 83 changer transitions 0/355 dead transitions. [2024-06-27 17:55:50,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 355 transitions, 5587 flow [2024-06-27 17:55:50,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:55:50,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:55:50,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 177 transitions. [2024-06-27 17:55:50,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6413043478260869 [2024-06-27 17:55:50,057 INFO L175 Difference]: Start difference. First operand has 238 places, 323 transitions, 4539 flow. Second operand 6 states and 177 transitions. [2024-06-27 17:55:50,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 355 transitions, 5587 flow [2024-06-27 17:55:50,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 355 transitions, 5507 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-27 17:55:50,492 INFO L231 Difference]: Finished difference. Result has 239 places, 326 transitions, 4688 flow [2024-06-27 17:55:50,492 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4459, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4688, PETRI_PLACES=239, PETRI_TRANSITIONS=326} [2024-06-27 17:55:50,492 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 189 predicate places. [2024-06-27 17:55:50,493 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 326 transitions, 4688 flow [2024-06-27 17:55:50,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.333333333333332) internal successors, (122), 6 states have internal predecessors, (122), 0 states have call successors, (0), 0 states 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 17:55:50,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:50,493 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:50,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-27 17:55:50,493 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:55:50,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:50,494 INFO L85 PathProgramCache]: Analyzing trace with hash -357296350, now seen corresponding path program 5 times [2024-06-27 17:55:50,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:50,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35737296] [2024-06-27 17:55:50,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:50,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:50,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:50,575 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 17:55:50,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:50,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35737296] [2024-06-27 17:55:50,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35737296] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:50,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:50,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:55:50,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367974031] [2024-06-27 17:55:50,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:50,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:55:50,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:50,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:55:50,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:55:50,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:55:50,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 326 transitions, 4688 flow. Second operand has 6 states, 6 states have (on average 20.333333333333332) internal successors, (122), 6 states have internal predecessors, (122), 0 states have call successors, (0), 0 states 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 17:55:50,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:50,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:55:50,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:51,333 INFO L124 PetriNetUnfolderBase]: 3493/5818 cut-off events. [2024-06-27 17:55:51,334 INFO L125 PetriNetUnfolderBase]: For 209576/209584 co-relation queries the response was YES. [2024-06-27 17:55:51,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34739 conditions, 5818 events. 3493/5818 cut-off events. For 209576/209584 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 39982 event pairs, 645 based on Foata normal form. 7/5766 useless extension candidates. Maximal degree in co-relation 34628. Up to 4781 conditions per place. [2024-06-27 17:55:51,390 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 252 selfloop transitions, 88 changer transitions 0/355 dead transitions. [2024-06-27 17:55:51,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 355 transitions, 5633 flow [2024-06-27 17:55:51,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:55:51,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:55:51,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 173 transitions. [2024-06-27 17:55:51,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6268115942028986 [2024-06-27 17:55:51,392 INFO L175 Difference]: Start difference. First operand has 239 places, 326 transitions, 4688 flow. Second operand 6 states and 173 transitions. [2024-06-27 17:55:51,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 355 transitions, 5633 flow [2024-06-27 17:55:52,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 355 transitions, 5343 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-27 17:55:52,063 INFO L231 Difference]: Finished difference. Result has 240 places, 330 transitions, 4657 flow [2024-06-27 17:55:52,063 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4419, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4657, PETRI_PLACES=240, PETRI_TRANSITIONS=330} [2024-06-27 17:55:52,065 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 190 predicate places. [2024-06-27 17:55:52,065 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 330 transitions, 4657 flow [2024-06-27 17:55:52,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.333333333333332) internal successors, (122), 6 states have internal predecessors, (122), 0 states have call successors, (0), 0 states 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 17:55:52,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:52,065 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:52,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-27 17:55:52,066 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:55:52,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:52,066 INFO L85 PathProgramCache]: Analyzing trace with hash -1960229820, now seen corresponding path program 6 times [2024-06-27 17:55:52,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:52,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347750609] [2024-06-27 17:55:52,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:52,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:52,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:52,173 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 17:55:52,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:52,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347750609] [2024-06-27 17:55:52,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347750609] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:52,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:52,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:55:52,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361128992] [2024-06-27 17:55:52,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:52,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:55:52,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:52,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:55:52,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:55:52,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:55:52,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 330 transitions, 4657 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states 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 17:55:52,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:52,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:55:52,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:52,964 INFO L124 PetriNetUnfolderBase]: 3504/5897 cut-off events. [2024-06-27 17:55:52,964 INFO L125 PetriNetUnfolderBase]: For 211961/211961 co-relation queries the response was YES. [2024-06-27 17:55:53,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34858 conditions, 5897 events. 3504/5897 cut-off events. For 211961/211961 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 40705 event pairs, 674 based on Foata normal form. 1/5841 useless extension candidates. Maximal degree in co-relation 34748. Up to 4793 conditions per place. [2024-06-27 17:55:53,023 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 255 selfloop transitions, 94 changer transitions 0/364 dead transitions. [2024-06-27 17:55:53,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 364 transitions, 5619 flow [2024-06-27 17:55:53,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:55:53,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:55:53,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 200 transitions. [2024-06-27 17:55:53,024 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6211180124223602 [2024-06-27 17:55:53,024 INFO L175 Difference]: Start difference. First operand has 240 places, 330 transitions, 4657 flow. Second operand 7 states and 200 transitions. [2024-06-27 17:55:53,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 364 transitions, 5619 flow [2024-06-27 17:55:53,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 364 transitions, 5488 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-27 17:55:53,509 INFO L231 Difference]: Finished difference. Result has 245 places, 333 transitions, 4776 flow [2024-06-27 17:55:53,509 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4529, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4776, PETRI_PLACES=245, PETRI_TRANSITIONS=333} [2024-06-27 17:55:53,510 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 195 predicate places. [2024-06-27 17:55:53,510 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 333 transitions, 4776 flow [2024-06-27 17:55:53,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states 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 17:55:53,510 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:53,510 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:53,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-27 17:55:53,510 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:55:53,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:53,510 INFO L85 PathProgramCache]: Analyzing trace with hash -1464426784, now seen corresponding path program 4 times [2024-06-27 17:55:53,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:53,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827731047] [2024-06-27 17:55:53,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:53,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:53,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:53,592 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 17:55:53,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:53,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827731047] [2024-06-27 17:55:53,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827731047] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:53,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:53,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:55:53,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403476162] [2024-06-27 17:55:53,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:53,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:55:53,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:53,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:55:53,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:55:53,631 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:55:53,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 333 transitions, 4776 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states 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 17:55:53,631 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:53,631 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:55:53,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:54,458 INFO L124 PetriNetUnfolderBase]: 3515/5843 cut-off events. [2024-06-27 17:55:54,458 INFO L125 PetriNetUnfolderBase]: For 216526/216526 co-relation queries the response was YES. [2024-06-27 17:55:54,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35133 conditions, 5843 events. 3515/5843 cut-off events. For 216526/216526 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 39921 event pairs, 684 based on Foata normal form. 1/5774 useless extension candidates. Maximal degree in co-relation 35022. Up to 4579 conditions per place. [2024-06-27 17:55:54,512 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 242 selfloop transitions, 115 changer transitions 0/372 dead transitions. [2024-06-27 17:55:54,513 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 372 transitions, 6072 flow [2024-06-27 17:55:54,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:55:54,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:55:54,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 205 transitions. [2024-06-27 17:55:54,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6366459627329193 [2024-06-27 17:55:54,514 INFO L175 Difference]: Start difference. First operand has 245 places, 333 transitions, 4776 flow. Second operand 7 states and 205 transitions. [2024-06-27 17:55:54,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 372 transitions, 6072 flow [2024-06-27 17:55:55,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 372 transitions, 5935 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-27 17:55:55,075 INFO L231 Difference]: Finished difference. Result has 248 places, 339 transitions, 5009 flow [2024-06-27 17:55:55,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4639, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5009, PETRI_PLACES=248, PETRI_TRANSITIONS=339} [2024-06-27 17:55:55,075 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 198 predicate places. [2024-06-27 17:55:55,075 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 339 transitions, 5009 flow [2024-06-27 17:55:55,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states 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 17:55:55,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:55,076 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:55,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-27 17:55:55,076 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:55:55,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:55,076 INFO L85 PathProgramCache]: Analyzing trace with hash -2026636820, now seen corresponding path program 7 times [2024-06-27 17:55:55,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:55,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804026124] [2024-06-27 17:55:55,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:55,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:55,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:55,176 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 17:55:55,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:55,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804026124] [2024-06-27 17:55:55,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804026124] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:55,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:55,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:55:55,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120082018] [2024-06-27 17:55:55,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:55,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:55:55,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:55,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:55:55,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:55:55,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:55:55,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 339 transitions, 5009 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states 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 17:55:55,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:55,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:55:55,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:56,057 INFO L124 PetriNetUnfolderBase]: 3512/5904 cut-off events. [2024-06-27 17:55:56,057 INFO L125 PetriNetUnfolderBase]: For 226492/226492 co-relation queries the response was YES. [2024-06-27 17:55:56,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35419 conditions, 5904 events. 3512/5904 cut-off events. For 226492/226492 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 40709 event pairs, 671 based on Foata normal form. 1/5848 useless extension candidates. Maximal degree in co-relation 35306. Up to 4805 conditions per place. [2024-06-27 17:55:56,123 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 258 selfloop transitions, 95 changer transitions 0/368 dead transitions. [2024-06-27 17:55:56,124 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 368 transitions, 6037 flow [2024-06-27 17:55:56,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:55:56,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:55:56,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 199 transitions. [2024-06-27 17:55:56,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6180124223602484 [2024-06-27 17:55:56,125 INFO L175 Difference]: Start difference. First operand has 248 places, 339 transitions, 5009 flow. Second operand 7 states and 199 transitions. [2024-06-27 17:55:56,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 368 transitions, 6037 flow [2024-06-27 17:55:56,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 368 transitions, 5921 flow, removed 34 selfloop flow, removed 2 redundant places. [2024-06-27 17:55:56,830 INFO L231 Difference]: Finished difference. Result has 253 places, 339 transitions, 5089 flow [2024-06-27 17:55:56,830 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4893, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5089, PETRI_PLACES=253, PETRI_TRANSITIONS=339} [2024-06-27 17:55:56,831 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 203 predicate places. [2024-06-27 17:55:56,831 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 339 transitions, 5089 flow [2024-06-27 17:55:56,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states 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 17:55:56,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:56,831 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:56,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-27 17:55:56,832 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:55:56,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:56,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1080196354, now seen corresponding path program 5 times [2024-06-27 17:55:56,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:56,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029666959] [2024-06-27 17:55:56,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:56,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:56,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:56,928 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 17:55:56,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:56,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029666959] [2024-06-27 17:55:56,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029666959] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:56,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:56,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:55:56,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720708524] [2024-06-27 17:55:56,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:56,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:55:56,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:56,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:55:56,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:55:56,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:55:56,967 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 339 transitions, 5089 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states 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 17:55:56,967 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:56,967 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:55:56,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:57,797 INFO L124 PetriNetUnfolderBase]: 3526/6031 cut-off events. [2024-06-27 17:55:57,797 INFO L125 PetriNetUnfolderBase]: For 232370/232380 co-relation queries the response was YES. [2024-06-27 17:55:57,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36009 conditions, 6031 events. 3526/6031 cut-off events. For 232370/232380 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 42178 event pairs, 880 based on Foata normal form. 1/5973 useless extension candidates. Maximal degree in co-relation 35893. Up to 5066 conditions per place. [2024-06-27 17:55:57,855 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 309 selfloop transitions, 42 changer transitions 0/366 dead transitions. [2024-06-27 17:55:57,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 366 transitions, 5911 flow [2024-06-27 17:55:57,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:55:57,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:55:57,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 195 transitions. [2024-06-27 17:55:57,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6055900621118012 [2024-06-27 17:55:57,856 INFO L175 Difference]: Start difference. First operand has 253 places, 339 transitions, 5089 flow. Second operand 7 states and 195 transitions. [2024-06-27 17:55:57,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 366 transitions, 5911 flow [2024-06-27 17:55:58,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 366 transitions, 5703 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-27 17:55:58,462 INFO L231 Difference]: Finished difference. Result has 256 places, 342 transitions, 5037 flow [2024-06-27 17:55:58,462 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4881, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5037, PETRI_PLACES=256, PETRI_TRANSITIONS=342} [2024-06-27 17:55:58,462 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 206 predicate places. [2024-06-27 17:55:58,463 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 342 transitions, 5037 flow [2024-06-27 17:55:58,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states 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 17:55:58,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:58,463 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:58,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-27 17:55:58,463 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:55:58,463 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:58,463 INFO L85 PathProgramCache]: Analyzing trace with hash -1080641824, now seen corresponding path program 6 times [2024-06-27 17:55:58,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:58,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362807661] [2024-06-27 17:55:58,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:58,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:58,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:58,550 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 17:55:58,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:58,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362807661] [2024-06-27 17:55:58,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362807661] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:58,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:58,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:55:58,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398894847] [2024-06-27 17:55:58,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:58,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:55:58,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:58,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:55:58,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:55:58,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:55:58,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 342 transitions, 5037 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states 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 17:55:58,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:58,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:55:58,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:59,352 INFO L124 PetriNetUnfolderBase]: 3534/5958 cut-off events. [2024-06-27 17:55:59,353 INFO L125 PetriNetUnfolderBase]: For 239619/239619 co-relation queries the response was YES. [2024-06-27 17:55:59,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35629 conditions, 5958 events. 3534/5958 cut-off events. For 239619/239619 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 41148 event pairs, 698 based on Foata normal form. 1/5889 useless extension candidates. Maximal degree in co-relation 35512. Up to 4593 conditions per place. [2024-06-27 17:55:59,414 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 238 selfloop transitions, 121 changer transitions 0/374 dead transitions. [2024-06-27 17:55:59,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 374 transitions, 6151 flow [2024-06-27 17:55:59,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:55:59,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:55:59,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 202 transitions. [2024-06-27 17:55:59,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6273291925465838 [2024-06-27 17:55:59,415 INFO L175 Difference]: Start difference. First operand has 256 places, 342 transitions, 5037 flow. Second operand 7 states and 202 transitions. [2024-06-27 17:55:59,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 374 transitions, 6151 flow [2024-06-27 17:56:00,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 374 transitions, 6013 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-27 17:56:00,149 INFO L231 Difference]: Finished difference. Result has 258 places, 345 transitions, 5213 flow [2024-06-27 17:56:00,149 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4899, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5213, PETRI_PLACES=258, PETRI_TRANSITIONS=345} [2024-06-27 17:56:00,149 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 208 predicate places. [2024-06-27 17:56:00,149 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 345 transitions, 5213 flow [2024-06-27 17:56:00,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states 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 17:56:00,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:00,150 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:00,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-27 17:56:00,150 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:56:00,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:00,150 INFO L85 PathProgramCache]: Analyzing trace with hash -718071392, now seen corresponding path program 8 times [2024-06-27 17:56:00,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:00,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407828686] [2024-06-27 17:56:00,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:00,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:00,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:00,239 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 17:56:00,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:00,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407828686] [2024-06-27 17:56:00,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407828686] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:00,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:00,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:56:00,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763444948] [2024-06-27 17:56:00,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:00,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:56:00,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:00,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:56:00,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:56:00,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:56:00,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 345 transitions, 5213 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states 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 17:56:00,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:00,272 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:56:00,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:01,097 INFO L124 PetriNetUnfolderBase]: 3531/5945 cut-off events. [2024-06-27 17:56:01,097 INFO L125 PetriNetUnfolderBase]: For 245261/245261 co-relation queries the response was YES. [2024-06-27 17:56:01,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35945 conditions, 5945 events. 3531/5945 cut-off events. For 245261/245261 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 41132 event pairs, 670 based on Foata normal form. 1/5888 useless extension candidates. Maximal degree in co-relation 35827. Up to 4832 conditions per place. [2024-06-27 17:56:01,154 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 268 selfloop transitions, 96 changer transitions 0/379 dead transitions. [2024-06-27 17:56:01,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 379 transitions, 6159 flow [2024-06-27 17:56:01,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:56:01,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:56:01,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 246 transitions. [2024-06-27 17:56:01,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5942028985507246 [2024-06-27 17:56:01,155 INFO L175 Difference]: Start difference. First operand has 258 places, 345 transitions, 5213 flow. Second operand 9 states and 246 transitions. [2024-06-27 17:56:01,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 379 transitions, 6159 flow [2024-06-27 17:56:01,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 379 transitions, 5909 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-27 17:56:01,880 INFO L231 Difference]: Finished difference. Result has 263 places, 345 transitions, 5161 flow [2024-06-27 17:56:01,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4963, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5161, PETRI_PLACES=263, PETRI_TRANSITIONS=345} [2024-06-27 17:56:01,881 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 213 predicate places. [2024-06-27 17:56:01,881 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 345 transitions, 5161 flow [2024-06-27 17:56:01,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states 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 17:56:01,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:01,881 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:01,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-27 17:56:01,881 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:56:01,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:01,881 INFO L85 PathProgramCache]: Analyzing trace with hash -204272286, now seen corresponding path program 9 times [2024-06-27 17:56:01,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:01,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757847863] [2024-06-27 17:56:01,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:01,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:01,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:01,971 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 17:56:01,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:01,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757847863] [2024-06-27 17:56:01,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757847863] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:01,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:01,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:56:01,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219754143] [2024-06-27 17:56:01,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:01,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:56:01,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:01,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:56:01,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:56:02,026 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:56:02,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 345 transitions, 5161 flow. Second operand has 6 states, 6 states have (on average 20.333333333333332) internal successors, (122), 6 states have internal predecessors, (122), 0 states have call successors, (0), 0 states 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 17:56:02,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:02,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:56:02,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:02,882 INFO L124 PetriNetUnfolderBase]: 3525/5843 cut-off events. [2024-06-27 17:56:02,882 INFO L125 PetriNetUnfolderBase]: For 242785/242785 co-relation queries the response was YES. [2024-06-27 17:56:02,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35666 conditions, 5843 events. 3525/5843 cut-off events. For 242785/242785 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 39936 event pairs, 601 based on Foata normal form. 1/5789 useless extension candidates. Maximal degree in co-relation 35547. Up to 4801 conditions per place. [2024-06-27 17:56:02,941 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 262 selfloop transitions, 99 changer transitions 0/376 dead transitions. [2024-06-27 17:56:02,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 376 transitions, 6107 flow [2024-06-27 17:56:02,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:56:02,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:56:02,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 183 transitions. [2024-06-27 17:56:02,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6630434782608695 [2024-06-27 17:56:02,942 INFO L175 Difference]: Start difference. First operand has 263 places, 345 transitions, 5161 flow. Second operand 6 states and 183 transitions. [2024-06-27 17:56:02,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 376 transitions, 6107 flow [2024-06-27 17:56:03,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 376 transitions, 5907 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-27 17:56:03,766 INFO L231 Difference]: Finished difference. Result has 262 places, 345 transitions, 5172 flow [2024-06-27 17:56:03,766 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4961, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5172, PETRI_PLACES=262, PETRI_TRANSITIONS=345} [2024-06-27 17:56:03,767 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 212 predicate places. [2024-06-27 17:56:03,767 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 345 transitions, 5172 flow [2024-06-27 17:56:03,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.333333333333332) internal successors, (122), 6 states have internal predecessors, (122), 0 states have call successors, (0), 0 states 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 17:56:03,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:03,767 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:03,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-27 17:56:03,767 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:56:03,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:03,767 INFO L85 PathProgramCache]: Analyzing trace with hash 23807610, now seen corresponding path program 7 times [2024-06-27 17:56:03,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:03,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193924698] [2024-06-27 17:56:03,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:03,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:03,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:03,869 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 17:56:03,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:03,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193924698] [2024-06-27 17:56:03,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193924698] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:03,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:03,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:56:03,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754630828] [2024-06-27 17:56:03,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:03,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:56:03,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:03,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:56:03,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:56:03,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:56:03,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 345 transitions, 5172 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states 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 17:56:03,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:03,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:56:03,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:04,733 INFO L124 PetriNetUnfolderBase]: 3567/5917 cut-off events. [2024-06-27 17:56:04,733 INFO L125 PetriNetUnfolderBase]: For 253886/253888 co-relation queries the response was YES. [2024-06-27 17:56:04,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36503 conditions, 5917 events. 3567/5917 cut-off events. For 253886/253888 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 40473 event pairs, 600 based on Foata normal form. 1/5865 useless extension candidates. Maximal degree in co-relation 36383. Up to 4961 conditions per place. [2024-06-27 17:56:04,795 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 305 selfloop transitions, 81 changer transitions 0/401 dead transitions. [2024-06-27 17:56:04,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 401 transitions, 6537 flow [2024-06-27 17:56:04,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:56:04,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:56:04,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 244 transitions. [2024-06-27 17:56:04,796 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6630434782608695 [2024-06-27 17:56:04,796 INFO L175 Difference]: Start difference. First operand has 262 places, 345 transitions, 5172 flow. Second operand 8 states and 244 transitions. [2024-06-27 17:56:04,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 401 transitions, 6537 flow [2024-06-27 17:56:05,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 401 transitions, 6311 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-27 17:56:05,559 INFO L231 Difference]: Finished difference. Result has 266 places, 355 transitions, 5408 flow [2024-06-27 17:56:05,559 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4950, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5408, PETRI_PLACES=266, PETRI_TRANSITIONS=355} [2024-06-27 17:56:05,559 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 216 predicate places. [2024-06-27 17:56:05,560 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 355 transitions, 5408 flow [2024-06-27 17:56:05,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states 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 17:56:05,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:05,560 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:05,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-27 17:56:05,560 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:56:05,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:05,561 INFO L85 PathProgramCache]: Analyzing trace with hash 17141370, now seen corresponding path program 8 times [2024-06-27 17:56:05,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:05,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232437636] [2024-06-27 17:56:05,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:05,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:05,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:05,667 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 17:56:05,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:05,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232437636] [2024-06-27 17:56:05,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232437636] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:05,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:05,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:56:05,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456885457] [2024-06-27 17:56:05,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:05,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:56:05,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:05,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:56:05,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:56:05,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:56:05,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 355 transitions, 5408 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states 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 17:56:05,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:05,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:56:05,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:06,533 INFO L124 PetriNetUnfolderBase]: 3564/5966 cut-off events. [2024-06-27 17:56:06,533 INFO L125 PetriNetUnfolderBase]: For 252542/252544 co-relation queries the response was YES. [2024-06-27 17:56:06,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36697 conditions, 5966 events. 3564/5966 cut-off events. For 252542/252544 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 41117 event pairs, 638 based on Foata normal form. 1/5911 useless extension candidates. Maximal degree in co-relation 36575. Up to 4959 conditions per place. [2024-06-27 17:56:06,597 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 299 selfloop transitions, 74 changer transitions 0/388 dead transitions. [2024-06-27 17:56:06,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 388 transitions, 6384 flow [2024-06-27 17:56:06,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:56:06,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:56:06,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 187 transitions. [2024-06-27 17:56:06,598 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.677536231884058 [2024-06-27 17:56:06,598 INFO L175 Difference]: Start difference. First operand has 266 places, 355 transitions, 5408 flow. Second operand 6 states and 187 transitions. [2024-06-27 17:56:06,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 388 transitions, 6384 flow [2024-06-27 17:56:07,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 388 transitions, 6190 flow, removed 49 selfloop flow, removed 5 redundant places. [2024-06-27 17:56:07,361 INFO L231 Difference]: Finished difference. Result has 267 places, 355 transitions, 5381 flow [2024-06-27 17:56:07,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5216, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5381, PETRI_PLACES=267, PETRI_TRANSITIONS=355} [2024-06-27 17:56:07,361 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 217 predicate places. [2024-06-27 17:56:07,361 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 355 transitions, 5381 flow [2024-06-27 17:56:07,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states 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 17:56:07,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:07,362 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:07,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-27 17:56:07,362 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:56:07,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:07,362 INFO L85 PathProgramCache]: Analyzing trace with hash -410955300, now seen corresponding path program 9 times [2024-06-27 17:56:07,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:07,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292491609] [2024-06-27 17:56:07,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:07,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:07,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:07,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:56:07,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:07,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292491609] [2024-06-27 17:56:07,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292491609] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:07,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:07,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:56:07,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100270765] [2024-06-27 17:56:07,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:07,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:56:07,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:07,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:56:07,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:56:07,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:56:07,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 355 transitions, 5381 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states 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 17:56:07,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:07,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:56:07,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:08,358 INFO L124 PetriNetUnfolderBase]: 3653/6061 cut-off events. [2024-06-27 17:56:08,358 INFO L125 PetriNetUnfolderBase]: For 266459/266461 co-relation queries the response was YES. [2024-06-27 17:56:08,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37923 conditions, 6061 events. 3653/6061 cut-off events. For 266459/266461 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 41627 event pairs, 590 based on Foata normal form. 2/6018 useless extension candidates. Maximal degree in co-relation 37801. Up to 4707 conditions per place. [2024-06-27 17:56:08,421 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 249 selfloop transitions, 152 changer transitions 0/416 dead transitions. [2024-06-27 17:56:08,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 416 transitions, 6926 flow [2024-06-27 17:56:08,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:56:08,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:56:08,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 265 transitions. [2024-06-27 17:56:08,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6400966183574879 [2024-06-27 17:56:08,422 INFO L175 Difference]: Start difference. First operand has 267 places, 355 transitions, 5381 flow. Second operand 9 states and 265 transitions. [2024-06-27 17:56:08,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 416 transitions, 6926 flow [2024-06-27 17:56:09,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 416 transitions, 6776 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-27 17:56:09,298 INFO L231 Difference]: Finished difference. Result has 273 places, 371 transitions, 5965 flow [2024-06-27 17:56:09,298 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5233, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5965, PETRI_PLACES=273, PETRI_TRANSITIONS=371} [2024-06-27 17:56:09,298 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 223 predicate places. [2024-06-27 17:56:09,298 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 371 transitions, 5965 flow [2024-06-27 17:56:09,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states 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 17:56:09,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:09,299 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:09,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-27 17:56:09,299 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:56:09,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:09,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1301905400, now seen corresponding path program 10 times [2024-06-27 17:56:09,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:09,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743223316] [2024-06-27 17:56:09,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:09,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:09,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:09,385 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 17:56:09,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:09,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743223316] [2024-06-27 17:56:09,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743223316] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:09,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:09,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:56:09,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143984536] [2024-06-27 17:56:09,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:09,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:56:09,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:09,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:56:09,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:56:09,412 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:56:09,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 371 transitions, 5965 flow. Second operand has 6 states, 6 states have (on average 20.333333333333332) internal successors, (122), 6 states have internal predecessors, (122), 0 states have call successors, (0), 0 states 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 17:56:09,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:09,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:56:09,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:10,265 INFO L124 PetriNetUnfolderBase]: 3650/6065 cut-off events. [2024-06-27 17:56:10,265 INFO L125 PetriNetUnfolderBase]: For 275904/275906 co-relation queries the response was YES. [2024-06-27 17:56:10,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39495 conditions, 6065 events. 3650/6065 cut-off events. For 275904/275906 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 41721 event pairs, 590 based on Foata normal form. 1/6020 useless extension candidates. Maximal degree in co-relation 39370. Up to 4972 conditions per place. [2024-06-27 17:56:10,330 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 293 selfloop transitions, 101 changer transitions 0/409 dead transitions. [2024-06-27 17:56:10,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 409 transitions, 6867 flow [2024-06-27 17:56:10,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:56:10,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:56:10,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 212 transitions. [2024-06-27 17:56:10,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6583850931677019 [2024-06-27 17:56:10,331 INFO L175 Difference]: Start difference. First operand has 273 places, 371 transitions, 5965 flow. Second operand 7 states and 212 transitions. [2024-06-27 17:56:10,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 409 transitions, 6867 flow [2024-06-27 17:56:11,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 409 transitions, 6661 flow, removed 73 selfloop flow, removed 4 redundant places. [2024-06-27 17:56:11,455 INFO L231 Difference]: Finished difference. Result has 276 places, 371 transitions, 6003 flow [2024-06-27 17:56:11,456 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5759, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6003, PETRI_PLACES=276, PETRI_TRANSITIONS=371} [2024-06-27 17:56:11,456 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 226 predicate places. [2024-06-27 17:56:11,456 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 371 transitions, 6003 flow [2024-06-27 17:56:11,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.333333333333332) internal successors, (122), 6 states have internal predecessors, (122), 0 states have call successors, (0), 0 states 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 17:56:11,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:11,456 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:11,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-27 17:56:11,457 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:56:11,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:11,458 INFO L85 PathProgramCache]: Analyzing trace with hash -411192450, now seen corresponding path program 10 times [2024-06-27 17:56:11,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:11,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257143160] [2024-06-27 17:56:11,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:11,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:11,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:11,554 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 17:56:11,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:11,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257143160] [2024-06-27 17:56:11,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257143160] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:11,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:11,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:56:11,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227415122] [2024-06-27 17:56:11,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:11,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:56:11,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:11,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:56:11,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:56:11,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:56:11,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 371 transitions, 6003 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states 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 17:56:11,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:11,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:56:11,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:12,442 INFO L124 PetriNetUnfolderBase]: 3644/6057 cut-off events. [2024-06-27 17:56:12,442 INFO L125 PetriNetUnfolderBase]: For 278429/278431 co-relation queries the response was YES. [2024-06-27 17:56:12,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39406 conditions, 6057 events. 3644/6057 cut-off events. For 278429/278431 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 41682 event pairs, 591 based on Foata normal form. 2/6009 useless extension candidates. Maximal degree in co-relation 39279. Up to 4701 conditions per place. [2024-06-27 17:56:12,505 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 246 selfloop transitions, 160 changer transitions 0/421 dead transitions. [2024-06-27 17:56:12,505 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 421 transitions, 7354 flow [2024-06-27 17:56:12,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:56:12,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:56:12,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 244 transitions. [2024-06-27 17:56:12,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6630434782608695 [2024-06-27 17:56:12,506 INFO L175 Difference]: Start difference. First operand has 276 places, 371 transitions, 6003 flow. Second operand 8 states and 244 transitions. [2024-06-27 17:56:12,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 421 transitions, 7354 flow [2024-06-27 17:56:13,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 421 transitions, 7051 flow, removed 23 selfloop flow, removed 9 redundant places. [2024-06-27 17:56:13,346 INFO L231 Difference]: Finished difference. Result has 275 places, 377 transitions, 6176 flow [2024-06-27 17:56:13,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5712, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6176, PETRI_PLACES=275, PETRI_TRANSITIONS=377} [2024-06-27 17:56:13,346 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 225 predicate places. [2024-06-27 17:56:13,347 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 377 transitions, 6176 flow [2024-06-27 17:56:13,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states 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 17:56:13,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:13,347 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:13,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-27 17:56:13,347 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:56:13,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:13,347 INFO L85 PathProgramCache]: Analyzing trace with hash -204539010, now seen corresponding path program 11 times [2024-06-27 17:56:13,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:13,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549748286] [2024-06-27 17:56:13,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:13,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:13,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:13,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:56:13,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:13,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549748286] [2024-06-27 17:56:13,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549748286] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:13,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:13,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:56:13,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463565291] [2024-06-27 17:56:13,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:13,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:56:13,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:13,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:56:13,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:56:13,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:56:13,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 377 transitions, 6176 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states 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 17:56:13,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:13,463 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:56:13,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:14,448 INFO L124 PetriNetUnfolderBase]: 3641/6033 cut-off events. [2024-06-27 17:56:14,448 INFO L125 PetriNetUnfolderBase]: For 263430/263430 co-relation queries the response was YES. [2024-06-27 17:56:14,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39244 conditions, 6033 events. 3641/6033 cut-off events. For 263430/263430 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 41411 event pairs, 622 based on Foata normal form. 1/5975 useless extension candidates. Maximal degree in co-relation 39119. Up to 4699 conditions per place. [2024-06-27 17:56:14,511 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 239 selfloop transitions, 159 changer transitions 0/413 dead transitions. [2024-06-27 17:56:14,511 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 413 transitions, 7359 flow [2024-06-27 17:56:14,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:56:14,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:56:14,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 212 transitions. [2024-06-27 17:56:14,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6583850931677019 [2024-06-27 17:56:14,512 INFO L175 Difference]: Start difference. First operand has 275 places, 377 transitions, 6176 flow. Second operand 7 states and 212 transitions. [2024-06-27 17:56:14,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 413 transitions, 7359 flow [2024-06-27 17:56:15,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 413 transitions, 7192 flow, removed 50 selfloop flow, removed 4 redundant places. [2024-06-27 17:56:15,300 INFO L231 Difference]: Finished difference. Result has 278 places, 377 transitions, 6333 flow [2024-06-27 17:56:15,300 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6009, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6333, PETRI_PLACES=278, PETRI_TRANSITIONS=377} [2024-06-27 17:56:15,300 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 228 predicate places. [2024-06-27 17:56:15,300 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 377 transitions, 6333 flow [2024-06-27 17:56:15,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states 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 17:56:15,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:15,301 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:15,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-27 17:56:15,301 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:56:15,301 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:15,301 INFO L85 PathProgramCache]: Analyzing trace with hash -410946372, now seen corresponding path program 2 times [2024-06-27 17:56:15,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:15,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281033679] [2024-06-27 17:56:15,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:15,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:15,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:15,412 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 17:56:15,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:15,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281033679] [2024-06-27 17:56:15,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281033679] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:15,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:15,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:56:15,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795427710] [2024-06-27 17:56:15,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:15,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:56:15,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:15,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:56:15,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:56:15,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 46 [2024-06-27 17:56:15,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 377 transitions, 6333 flow. Second operand has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:15,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:15,465 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 46 [2024-06-27 17:56:15,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:16,408 INFO L124 PetriNetUnfolderBase]: 3551/6109 cut-off events. [2024-06-27 17:56:16,408 INFO L125 PetriNetUnfolderBase]: For 290548/290562 co-relation queries the response was YES. [2024-06-27 17:56:16,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39082 conditions, 6109 events. 3551/6109 cut-off events. For 290548/290562 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 43706 event pairs, 1044 based on Foata normal form. 18/6001 useless extension candidates. Maximal degree in co-relation 38956. Up to 4723 conditions per place. [2024-06-27 17:56:16,477 INFO L140 encePairwiseOnDemand]: 39/46 looper letters, 304 selfloop transitions, 39 changer transitions 0/406 dead transitions. [2024-06-27 17:56:16,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 406 transitions, 7127 flow [2024-06-27 17:56:16,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:56:16,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:56:16,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 180 transitions. [2024-06-27 17:56:16,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6521739130434783 [2024-06-27 17:56:16,478 INFO L175 Difference]: Start difference. First operand has 278 places, 377 transitions, 6333 flow. Second operand 6 states and 180 transitions. [2024-06-27 17:56:16,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 406 transitions, 7127 flow [2024-06-27 17:56:17,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 406 transitions, 6799 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-27 17:56:17,394 INFO L231 Difference]: Finished difference. Result has 278 places, 378 transitions, 6109 flow [2024-06-27 17:56:17,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6005, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6109, PETRI_PLACES=278, PETRI_TRANSITIONS=378} [2024-06-27 17:56:17,395 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 228 predicate places. [2024-06-27 17:56:17,395 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 378 transitions, 6109 flow [2024-06-27 17:56:17,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:17,395 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:17,395 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:17,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-27 17:56:17,395 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:56:17,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:17,396 INFO L85 PathProgramCache]: Analyzing trace with hash 17150298, now seen corresponding path program 3 times [2024-06-27 17:56:17,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:17,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187268520] [2024-06-27 17:56:17,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:17,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:17,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:17,499 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 17:56:17,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:17,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187268520] [2024-06-27 17:56:17,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187268520] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:17,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:17,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:56:17,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872115668] [2024-06-27 17:56:17,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:17,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:56:17,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:17,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:56:17,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:56:17,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 46 [2024-06-27 17:56:17,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 378 transitions, 6109 flow. Second operand has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:17,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:17,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 46 [2024-06-27 17:56:17,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:18,400 INFO L124 PetriNetUnfolderBase]: 3613/6247 cut-off events. [2024-06-27 17:56:18,400 INFO L125 PetriNetUnfolderBase]: For 288666/288684 co-relation queries the response was YES. [2024-06-27 17:56:18,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39182 conditions, 6247 events. 3613/6247 cut-off events. For 288666/288684 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 45047 event pairs, 951 based on Foata normal form. 18/6133 useless extension candidates. Maximal degree in co-relation 39055. Up to 4852 conditions per place. [2024-06-27 17:56:18,468 INFO L140 encePairwiseOnDemand]: 39/46 looper letters, 312 selfloop transitions, 32 changer transitions 0/407 dead transitions. [2024-06-27 17:56:18,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 407 transitions, 6911 flow [2024-06-27 17:56:18,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:56:18,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:56:18,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 160 transitions. [2024-06-27 17:56:18,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6956521739130435 [2024-06-27 17:56:18,469 INFO L175 Difference]: Start difference. First operand has 278 places, 378 transitions, 6109 flow. Second operand 5 states and 160 transitions. [2024-06-27 17:56:18,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 407 transitions, 6911 flow [2024-06-27 17:56:19,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 407 transitions, 6831 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-27 17:56:19,439 INFO L231 Difference]: Finished difference. Result has 279 places, 379 transitions, 6125 flow [2024-06-27 17:56:19,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6031, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=6125, PETRI_PLACES=279, PETRI_TRANSITIONS=379} [2024-06-27 17:56:19,439 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 229 predicate places. [2024-06-27 17:56:19,439 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 379 transitions, 6125 flow [2024-06-27 17:56:19,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:19,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:19,440 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:19,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-27 17:56:19,440 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:56:19,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:19,440 INFO L85 PathProgramCache]: Analyzing trace with hash 32387418, now seen corresponding path program 4 times [2024-06-27 17:56:19,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:19,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449000183] [2024-06-27 17:56:19,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:19,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:19,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:19,553 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 17:56:19,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:19,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449000183] [2024-06-27 17:56:19,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449000183] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:19,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:19,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:56:19,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219093584] [2024-06-27 17:56:19,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:19,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:56:19,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:19,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:56:19,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:56:19,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 46 [2024-06-27 17:56:19,599 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 379 transitions, 6125 flow. Second operand has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:19,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:19,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 46 [2024-06-27 17:56:19,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:20,435 INFO L124 PetriNetUnfolderBase]: 3644/6119 cut-off events. [2024-06-27 17:56:20,435 INFO L125 PetriNetUnfolderBase]: For 271053/271055 co-relation queries the response was YES. [2024-06-27 17:56:20,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39062 conditions, 6119 events. 3644/6119 cut-off events. For 271053/271055 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 42765 event pairs, 437 based on Foata normal form. 8/6057 useless extension candidates. Maximal degree in co-relation 38934. Up to 4809 conditions per place. [2024-06-27 17:56:20,502 INFO L140 encePairwiseOnDemand]: 39/46 looper letters, 316 selfloop transitions, 35 changer transitions 0/414 dead transitions. [2024-06-27 17:56:20,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 414 transitions, 6963 flow [2024-06-27 17:56:20,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:56:20,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:56:20,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 187 transitions. [2024-06-27 17:56:20,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.677536231884058 [2024-06-27 17:56:20,503 INFO L175 Difference]: Start difference. First operand has 279 places, 379 transitions, 6125 flow. Second operand 6 states and 187 transitions. [2024-06-27 17:56:20,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 414 transitions, 6963 flow [2024-06-27 17:56:21,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 414 transitions, 6907 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-27 17:56:21,241 INFO L231 Difference]: Finished difference. Result has 282 places, 380 transitions, 6161 flow [2024-06-27 17:56:21,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6069, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6161, PETRI_PLACES=282, PETRI_TRANSITIONS=380} [2024-06-27 17:56:21,241 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 232 predicate places. [2024-06-27 17:56:21,242 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 380 transitions, 6161 flow [2024-06-27 17:56:21,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:21,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:21,242 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:21,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-27 17:56:21,242 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:56:21,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:21,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1198513310, now seen corresponding path program 1 times [2024-06-27 17:56:21,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:21,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880800396] [2024-06-27 17:56:21,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:21,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:21,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:21,331 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 17:56:21,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:21,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880800396] [2024-06-27 17:56:21,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880800396] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:21,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:21,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:56:21,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474746686] [2024-06-27 17:56:21,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:21,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:56:21,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:21,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:56:21,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:56:21,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 46 [2024-06-27 17:56:21,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 380 transitions, 6161 flow. Second operand has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states 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 17:56:21,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:21,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 46 [2024-06-27 17:56:21,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:22,274 INFO L124 PetriNetUnfolderBase]: 3720/6294 cut-off events. [2024-06-27 17:56:22,275 INFO L125 PetriNetUnfolderBase]: For 296700/296718 co-relation queries the response was YES. [2024-06-27 17:56:22,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40529 conditions, 6294 events. 3720/6294 cut-off events. For 296700/296718 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 44740 event pairs, 588 based on Foata normal form. 14/6255 useless extension candidates. Maximal degree in co-relation 40400. Up to 5052 conditions per place. [2024-06-27 17:56:22,354 INFO L140 encePairwiseOnDemand]: 39/46 looper letters, 324 selfloop transitions, 38 changer transitions 0/414 dead transitions. [2024-06-27 17:56:22,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 414 transitions, 7151 flow [2024-06-27 17:56:22,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:56:22,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:56:22,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 182 transitions. [2024-06-27 17:56:22,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6594202898550725 [2024-06-27 17:56:22,355 INFO L175 Difference]: Start difference. First operand has 282 places, 380 transitions, 6161 flow. Second operand 6 states and 182 transitions. [2024-06-27 17:56:22,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 414 transitions, 7151 flow [2024-06-27 17:56:23,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 414 transitions, 7073 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-27 17:56:23,160 INFO L231 Difference]: Finished difference. Result has 284 places, 382 transitions, 6185 flow [2024-06-27 17:56:23,160 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6083, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6185, PETRI_PLACES=284, PETRI_TRANSITIONS=382} [2024-06-27 17:56:23,160 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 234 predicate places. [2024-06-27 17:56:23,160 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 382 transitions, 6185 flow [2024-06-27 17:56:23,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states 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 17:56:23,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:23,161 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:23,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-27 17:56:23,161 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:56:23,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:23,161 INFO L85 PathProgramCache]: Analyzing trace with hash -357286430, now seen corresponding path program 2 times [2024-06-27 17:56:23,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:23,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724987741] [2024-06-27 17:56:23,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:23,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:23,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:23,242 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 17:56:23,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:23,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724987741] [2024-06-27 17:56:23,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724987741] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:23,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:23,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:56:23,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615469023] [2024-06-27 17:56:23,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:23,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:56:23,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:23,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:56:23,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:56:23,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 46 [2024-06-27 17:56:23,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 382 transitions, 6185 flow. Second operand has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states 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 17:56:23,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:23,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 46 [2024-06-27 17:56:23,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:24,181 INFO L124 PetriNetUnfolderBase]: 3777/6630 cut-off events. [2024-06-27 17:56:24,181 INFO L125 PetriNetUnfolderBase]: For 310193/310231 co-relation queries the response was YES. [2024-06-27 17:56:24,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41150 conditions, 6630 events. 3777/6630 cut-off events. For 310193/310231 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 48602 event pairs, 902 based on Foata normal form. 31/6603 useless extension candidates. Maximal degree in co-relation 41020. Up to 5289 conditions per place. [2024-06-27 17:56:24,261 INFO L140 encePairwiseOnDemand]: 39/46 looper letters, 320 selfloop transitions, 36 changer transitions 0/408 dead transitions. [2024-06-27 17:56:24,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 408 transitions, 6993 flow [2024-06-27 17:56:24,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:56:24,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:56:24,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 176 transitions. [2024-06-27 17:56:24,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6376811594202898 [2024-06-27 17:56:24,262 INFO L175 Difference]: Start difference. First operand has 284 places, 382 transitions, 6185 flow. Second operand 6 states and 176 transitions. [2024-06-27 17:56:24,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 408 transitions, 6993 flow [2024-06-27 17:56:25,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 408 transitions, 6950 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-27 17:56:25,219 INFO L231 Difference]: Finished difference. Result has 288 places, 383 transitions, 6234 flow [2024-06-27 17:56:25,219 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6142, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6234, PETRI_PLACES=288, PETRI_TRANSITIONS=383} [2024-06-27 17:56:25,220 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 238 predicate places. [2024-06-27 17:56:25,220 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 383 transitions, 6234 flow [2024-06-27 17:56:25,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states 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 17:56:25,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:25,220 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:25,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-27 17:56:25,220 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:56:25,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:25,220 INFO L85 PathProgramCache]: Analyzing trace with hash -1356761566, now seen corresponding path program 3 times [2024-06-27 17:56:25,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:25,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119897835] [2024-06-27 17:56:25,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:25,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:25,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:25,326 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 17:56:25,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:25,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119897835] [2024-06-27 17:56:25,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119897835] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:25,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:25,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:56:25,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541571295] [2024-06-27 17:56:25,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:25,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:56:25,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:25,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:56:25,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:56:25,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 46 [2024-06-27 17:56:25,358 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 383 transitions, 6234 flow. Second operand has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:25,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:25,358 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 46 [2024-06-27 17:56:25,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:26,313 INFO L124 PetriNetUnfolderBase]: 3877/6793 cut-off events. [2024-06-27 17:56:26,314 INFO L125 PetriNetUnfolderBase]: For 318828/318858 co-relation queries the response was YES. [2024-06-27 17:56:26,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42217 conditions, 6793 events. 3877/6793 cut-off events. For 318828/318858 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 49861 event pairs, 912 based on Foata normal form. 26/6764 useless extension candidates. Maximal degree in co-relation 42085. Up to 5418 conditions per place. [2024-06-27 17:56:26,389 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 321 selfloop transitions, 39 changer transitions 0/412 dead transitions. [2024-06-27 17:56:26,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 412 transitions, 7058 flow [2024-06-27 17:56:26,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:56:26,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:56:26,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 201 transitions. [2024-06-27 17:56:26,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6242236024844721 [2024-06-27 17:56:26,391 INFO L175 Difference]: Start difference. First operand has 288 places, 383 transitions, 6234 flow. Second operand 7 states and 201 transitions. [2024-06-27 17:56:26,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 412 transitions, 7058 flow [2024-06-27 17:56:27,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 412 transitions, 6986 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-27 17:56:27,263 INFO L231 Difference]: Finished difference. Result has 291 places, 384 transitions, 6262 flow [2024-06-27 17:56:27,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6162, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=383, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6262, PETRI_PLACES=291, PETRI_TRANSITIONS=384} [2024-06-27 17:56:27,263 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 241 predicate places. [2024-06-27 17:56:27,263 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 384 transitions, 6262 flow [2024-06-27 17:56:27,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:27,264 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:27,264 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:27,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-27 17:56:27,264 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:56:27,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:27,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1795685286, now seen corresponding path program 1 times [2024-06-27 17:56:27,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:27,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376660843] [2024-06-27 17:56:27,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:27,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:27,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:27,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:56:27,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:27,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376660843] [2024-06-27 17:56:27,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376660843] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:27,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:27,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:56:27,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910078054] [2024-06-27 17:56:27,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:27,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:56:27,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:27,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:56:27,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:56:27,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:56:27,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 384 transitions, 6262 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states 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 17:56:27,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:27,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:56:27,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:28,346 INFO L124 PetriNetUnfolderBase]: 4134/6870 cut-off events. [2024-06-27 17:56:28,347 INFO L125 PetriNetUnfolderBase]: For 306907/306917 co-relation queries the response was YES. [2024-06-27 17:56:28,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43654 conditions, 6870 events. 4134/6870 cut-off events. For 306907/306917 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 48339 event pairs, 722 based on Foata normal form. 2/6811 useless extension candidates. Maximal degree in co-relation 43521. Up to 5953 conditions per place. [2024-06-27 17:56:28,419 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 355 selfloop transitions, 41 changer transitions 0/411 dead transitions. [2024-06-27 17:56:28,419 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 411 transitions, 7164 flow [2024-06-27 17:56:28,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:56:28,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:56:28,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 195 transitions. [2024-06-27 17:56:28,420 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6055900621118012 [2024-06-27 17:56:28,420 INFO L175 Difference]: Start difference. First operand has 291 places, 384 transitions, 6262 flow. Second operand 7 states and 195 transitions. [2024-06-27 17:56:28,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 411 transitions, 7164 flow [2024-06-27 17:56:29,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 411 transitions, 7084 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-27 17:56:29,270 INFO L231 Difference]: Finished difference. Result has 293 places, 386 transitions, 6321 flow [2024-06-27 17:56:29,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6182, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6321, PETRI_PLACES=293, PETRI_TRANSITIONS=386} [2024-06-27 17:56:29,270 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 243 predicate places. [2024-06-27 17:56:29,270 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 386 transitions, 6321 flow [2024-06-27 17:56:29,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states 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 17:56:29,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:29,270 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:29,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-27 17:56:29,270 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:56:29,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:29,271 INFO L85 PathProgramCache]: Analyzing trace with hash 1763122604, now seen corresponding path program 4 times [2024-06-27 17:56:29,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:29,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463929719] [2024-06-27 17:56:29,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:29,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:29,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:29,351 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 17:56:29,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:29,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463929719] [2024-06-27 17:56:29,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463929719] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:29,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:29,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:56:29,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984230160] [2024-06-27 17:56:29,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:29,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:56:29,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:29,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:56:29,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:56:29,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 46 [2024-06-27 17:56:29,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 386 transitions, 6321 flow. Second operand has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states 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 17:56:29,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:29,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 46 [2024-06-27 17:56:29,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:30,294 INFO L124 PetriNetUnfolderBase]: 3877/6526 cut-off events. [2024-06-27 17:56:30,294 INFO L125 PetriNetUnfolderBase]: For 304880/304890 co-relation queries the response was YES. [2024-06-27 17:56:30,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41522 conditions, 6526 events. 3877/6526 cut-off events. For 304880/304890 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 46521 event pairs, 581 based on Foata normal form. 10/6487 useless extension candidates. Maximal degree in co-relation 41388. Up to 5399 conditions per place. [2024-06-27 17:56:30,368 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 338 selfloop transitions, 27 changer transitions 0/417 dead transitions. [2024-06-27 17:56:30,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 417 transitions, 7155 flow [2024-06-27 17:56:30,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:56:30,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:56:30,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 183 transitions. [2024-06-27 17:56:30,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6630434782608695 [2024-06-27 17:56:30,369 INFO L175 Difference]: Start difference. First operand has 293 places, 386 transitions, 6321 flow. Second operand 6 states and 183 transitions. [2024-06-27 17:56:30,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 417 transitions, 7155 flow [2024-06-27 17:56:31,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 417 transitions, 7030 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-27 17:56:31,137 INFO L231 Difference]: Finished difference. Result has 294 places, 386 transitions, 6259 flow [2024-06-27 17:56:31,137 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6196, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6259, PETRI_PLACES=294, PETRI_TRANSITIONS=386} [2024-06-27 17:56:31,137 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 244 predicate places. [2024-06-27 17:56:31,138 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 386 transitions, 6259 flow [2024-06-27 17:56:31,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states 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 17:56:31,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:31,138 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:31,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-27 17:56:31,138 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:56:31,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:31,139 INFO L85 PathProgramCache]: Analyzing trace with hash 32097692, now seen corresponding path program 2 times [2024-06-27 17:56:31,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:31,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245143221] [2024-06-27 17:56:31,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:31,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:31,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:31,247 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 17:56:31,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:31,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245143221] [2024-06-27 17:56:31,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245143221] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:31,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:31,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:56:31,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411854116] [2024-06-27 17:56:31,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:31,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:56:31,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:31,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:56:31,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:56:31,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:56:31,290 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 386 transitions, 6259 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states 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 17:56:31,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:31,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:56:31,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:32,286 INFO L124 PetriNetUnfolderBase]: 4129/7091 cut-off events. [2024-06-27 17:56:32,286 INFO L125 PetriNetUnfolderBase]: For 296840/296850 co-relation queries the response was YES. [2024-06-27 17:56:32,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43266 conditions, 7091 events. 4129/7091 cut-off events. For 296840/296850 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 51208 event pairs, 1003 based on Foata normal form. 2/7038 useless extension candidates. Maximal degree in co-relation 43131. Up to 5992 conditions per place. [2024-06-27 17:56:32,360 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 372 selfloop transitions, 26 changer transitions 0/413 dead transitions. [2024-06-27 17:56:32,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 413 transitions, 7173 flow [2024-06-27 17:56:32,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:56:32,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:56:32,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 175 transitions. [2024-06-27 17:56:32,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6340579710144928 [2024-06-27 17:56:32,361 INFO L175 Difference]: Start difference. First operand has 294 places, 386 transitions, 6259 flow. Second operand 6 states and 175 transitions. [2024-06-27 17:56:32,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 413 transitions, 7173 flow [2024-06-27 17:56:33,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 413 transitions, 7107 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-27 17:56:33,022 INFO L231 Difference]: Finished difference. Result has 295 places, 388 transitions, 6306 flow [2024-06-27 17:56:33,023 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6193, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6306, PETRI_PLACES=295, PETRI_TRANSITIONS=388} [2024-06-27 17:56:33,023 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 245 predicate places. [2024-06-27 17:56:33,023 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 388 transitions, 6306 flow [2024-06-27 17:56:33,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states 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 17:56:33,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:33,023 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:33,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-27 17:56:33,024 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:56:33,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:33,024 INFO L85 PathProgramCache]: Analyzing trace with hash 32394362, now seen corresponding path program 3 times [2024-06-27 17:56:33,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:33,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101492398] [2024-06-27 17:56:33,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:33,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:33,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:33,119 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 17:56:33,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:33,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101492398] [2024-06-27 17:56:33,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101492398] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:33,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:33,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:56:33,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506140884] [2024-06-27 17:56:33,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:33,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:56:33,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:33,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:56:33,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:56:33,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:56:33,177 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 388 transitions, 6306 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states 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 17:56:33,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:33,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:56:33,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:34,171 INFO L124 PetriNetUnfolderBase]: 4183/7104 cut-off events. [2024-06-27 17:56:34,171 INFO L125 PetriNetUnfolderBase]: For 312832/312842 co-relation queries the response was YES. [2024-06-27 17:56:34,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43940 conditions, 7104 events. 4183/7104 cut-off events. For 312832/312842 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 51017 event pairs, 949 based on Foata normal form. 2/7046 useless extension candidates. Maximal degree in co-relation 43804. Up to 5847 conditions per place. [2024-06-27 17:56:34,248 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 377 selfloop transitions, 30 changer transitions 0/422 dead transitions. [2024-06-27 17:56:34,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 422 transitions, 7446 flow [2024-06-27 17:56:34,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:56:34,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:56:34,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 181 transitions. [2024-06-27 17:56:34,249 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6557971014492754 [2024-06-27 17:56:34,249 INFO L175 Difference]: Start difference. First operand has 295 places, 388 transitions, 6306 flow. Second operand 6 states and 181 transitions. [2024-06-27 17:56:34,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 422 transitions, 7446 flow [2024-06-27 17:56:34,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 422 transitions, 7349 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-27 17:56:34,942 INFO L231 Difference]: Finished difference. Result has 297 places, 391 transitions, 6350 flow [2024-06-27 17:56:34,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6209, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6350, PETRI_PLACES=297, PETRI_TRANSITIONS=391} [2024-06-27 17:56:34,942 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 247 predicate places. [2024-06-27 17:56:34,942 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 391 transitions, 6350 flow [2024-06-27 17:56:34,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states 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 17:56:34,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:34,943 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:34,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-27 17:56:34,943 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:56:34,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:34,943 INFO L85 PathProgramCache]: Analyzing trace with hash 1264352212, now seen corresponding path program 1 times [2024-06-27 17:56:34,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:34,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32220613] [2024-06-27 17:56:34,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:34,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:34,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:35,044 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 17:56:35,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:35,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32220613] [2024-06-27 17:56:35,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32220613] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:35,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:35,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:56:35,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519148125] [2024-06-27 17:56:35,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:35,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 17:56:35,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:35,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 17:56:35,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 17:56:35,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 46 [2024-06-27 17:56:35,061 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 391 transitions, 6350 flow. Second operand has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states 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 17:56:35,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:35,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 46 [2024-06-27 17:56:35,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:36,008 INFO L124 PetriNetUnfolderBase]: 2775/5963 cut-off events. [2024-06-27 17:56:36,009 INFO L125 PetriNetUnfolderBase]: For 156076/156165 co-relation queries the response was YES. [2024-06-27 17:56:36,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27957 conditions, 5963 events. 2775/5963 cut-off events. For 156076/156165 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 51766 event pairs, 405 based on Foata normal form. 252/5763 useless extension candidates. Maximal degree in co-relation 27820. Up to 2383 conditions per place. [2024-06-27 17:56:36,068 INFO L140 encePairwiseOnDemand]: 40/46 looper letters, 32 selfloop transitions, 124 changer transitions 0/408 dead transitions. [2024-06-27 17:56:36,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 408 transitions, 6768 flow [2024-06-27 17:56:36,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 17:56:36,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 17:56:36,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 141 transitions. [2024-06-27 17:56:36,069 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7663043478260869 [2024-06-27 17:56:36,069 INFO L175 Difference]: Start difference. First operand has 297 places, 391 transitions, 6350 flow. Second operand 4 states and 141 transitions. [2024-06-27 17:56:36,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 408 transitions, 6768 flow [2024-06-27 17:56:36,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 408 transitions, 6692 flow, removed 26 selfloop flow, removed 2 redundant places. [2024-06-27 17:56:36,596 INFO L231 Difference]: Finished difference. Result has 300 places, 395 transitions, 6820 flow [2024-06-27 17:56:36,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6274, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=6820, PETRI_PLACES=300, PETRI_TRANSITIONS=395} [2024-06-27 17:56:36,597 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 250 predicate places. [2024-06-27 17:56:36,597 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 395 transitions, 6820 flow [2024-06-27 17:56:36,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states 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 17:56:36,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:36,598 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:36,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-27 17:56:36,598 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:56:36,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:36,598 INFO L85 PathProgramCache]: Analyzing trace with hash -168503318, now seen corresponding path program 1 times [2024-06-27 17:56:36,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:36,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778944249] [2024-06-27 17:56:36,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:36,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:36,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:36,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:56:36,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:36,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778944249] [2024-06-27 17:56:36,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778944249] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:36,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:36,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:56:36,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501780704] [2024-06-27 17:56:36,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:36,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:56:36,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:36,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:56:36,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:56:36,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:56:36,758 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 395 transitions, 6820 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states 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 17:56:36,758 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:36,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:56:36,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:37,794 INFO L124 PetriNetUnfolderBase]: 4033/6860 cut-off events. [2024-06-27 17:56:37,794 INFO L125 PetriNetUnfolderBase]: For 319345/319412 co-relation queries the response was YES. [2024-06-27 17:56:37,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43669 conditions, 6860 events. 4033/6860 cut-off events. For 319345/319412 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 48787 event pairs, 1224 based on Foata normal form. 19/6629 useless extension candidates. Maximal degree in co-relation 43529. Up to 5940 conditions per place. [2024-06-27 17:56:37,868 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 365 selfloop transitions, 54 changer transitions 0/435 dead transitions. [2024-06-27 17:56:37,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 435 transitions, 8034 flow [2024-06-27 17:56:37,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:56:37,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:56:37,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 223 transitions. [2024-06-27 17:56:37,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6059782608695652 [2024-06-27 17:56:37,869 INFO L175 Difference]: Start difference. First operand has 300 places, 395 transitions, 6820 flow. Second operand 8 states and 223 transitions. [2024-06-27 17:56:37,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 435 transitions, 8034 flow [2024-06-27 17:56:38,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 435 transitions, 8018 flow, removed 7 selfloop flow, removed 1 redundant places. [2024-06-27 17:56:38,905 INFO L231 Difference]: Finished difference. Result has 308 places, 401 transitions, 7059 flow [2024-06-27 17:56:38,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6804, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7059, PETRI_PLACES=308, PETRI_TRANSITIONS=401} [2024-06-27 17:56:38,906 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 258 predicate places. [2024-06-27 17:56:38,906 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 401 transitions, 7059 flow [2024-06-27 17:56:38,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states 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 17:56:38,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:38,906 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:38,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-27 17:56:38,906 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:56:38,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:38,907 INFO L85 PathProgramCache]: Analyzing trace with hash -1907845608, now seen corresponding path program 2 times [2024-06-27 17:56:38,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:38,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097813662] [2024-06-27 17:56:38,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:38,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:38,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:39,010 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 17:56:39,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:39,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097813662] [2024-06-27 17:56:39,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097813662] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:39,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:39,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:56:39,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876787795] [2024-06-27 17:56:39,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:39,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:56:39,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:39,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:56:39,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:56:39,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:56:39,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 401 transitions, 7059 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states 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 17:56:39,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:39,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:56:39,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:40,295 INFO L124 PetriNetUnfolderBase]: 4052/6888 cut-off events. [2024-06-27 17:56:40,295 INFO L125 PetriNetUnfolderBase]: For 328662/328783 co-relation queries the response was YES. [2024-06-27 17:56:40,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42775 conditions, 6888 events. 4052/6888 cut-off events. For 328662/328783 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 49010 event pairs, 1245 based on Foata normal form. 61/6700 useless extension candidates. Maximal degree in co-relation 42632. Up to 5579 conditions per place. [2024-06-27 17:56:40,364 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 278 selfloop transitions, 142 changer transitions 0/436 dead transitions. [2024-06-27 17:56:40,364 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 436 transitions, 8519 flow [2024-06-27 17:56:40,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:56:40,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:56:40,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 201 transitions. [2024-06-27 17:56:40,365 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6242236024844721 [2024-06-27 17:56:40,365 INFO L175 Difference]: Start difference. First operand has 308 places, 401 transitions, 7059 flow. Second operand 7 states and 201 transitions. [2024-06-27 17:56:40,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 436 transitions, 8519 flow [2024-06-27 17:56:41,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 436 transitions, 8406 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-06-27 17:56:41,514 INFO L231 Difference]: Finished difference. Result has 313 places, 410 transitions, 7566 flow [2024-06-27 17:56:41,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6946, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7566, PETRI_PLACES=313, PETRI_TRANSITIONS=410} [2024-06-27 17:56:41,515 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 263 predicate places. [2024-06-27 17:56:41,515 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 410 transitions, 7566 flow [2024-06-27 17:56:41,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states 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 17:56:41,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:41,516 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:41,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-27 17:56:41,516 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:56:41,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:41,516 INFO L85 PathProgramCache]: Analyzing trace with hash -52913618, now seen corresponding path program 3 times [2024-06-27 17:56:41,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:41,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830529040] [2024-06-27 17:56:41,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:41,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:41,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:41,609 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 17:56:41,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:41,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830529040] [2024-06-27 17:56:41,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830529040] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:41,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:41,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:56:41,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779390240] [2024-06-27 17:56:41,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:41,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:56:41,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:41,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:56:41,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:56:41,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:56:41,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 410 transitions, 7566 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states 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 17:56:41,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:41,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:56:41,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:42,689 INFO L124 PetriNetUnfolderBase]: 4058/6903 cut-off events. [2024-06-27 17:56:42,689 INFO L125 PetriNetUnfolderBase]: For 342890/343021 co-relation queries the response was YES. [2024-06-27 17:56:42,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44118 conditions, 6903 events. 4058/6903 cut-off events. For 342890/343021 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 49205 event pairs, 1252 based on Foata normal form. 75/6729 useless extension candidates. Maximal degree in co-relation 43971. Up to 5584 conditions per place. [2024-06-27 17:56:42,772 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 275 selfloop transitions, 145 changer transitions 0/436 dead transitions. [2024-06-27 17:56:42,773 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 436 transitions, 8908 flow [2024-06-27 17:56:42,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:56:42,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:56:42,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 198 transitions. [2024-06-27 17:56:42,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6149068322981367 [2024-06-27 17:56:42,773 INFO L175 Difference]: Start difference. First operand has 313 places, 410 transitions, 7566 flow. Second operand 7 states and 198 transitions. [2024-06-27 17:56:42,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 436 transitions, 8908 flow [2024-06-27 17:56:43,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 436 transitions, 8738 flow, removed 59 selfloop flow, removed 2 redundant places. [2024-06-27 17:56:43,847 INFO L231 Difference]: Finished difference. Result has 318 places, 413 transitions, 7776 flow [2024-06-27 17:56:43,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7418, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7776, PETRI_PLACES=318, PETRI_TRANSITIONS=413} [2024-06-27 17:56:43,848 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 268 predicate places. [2024-06-27 17:56:43,848 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 413 transitions, 7776 flow [2024-06-27 17:56:43,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states 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 17:56:43,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:43,849 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:43,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-27 17:56:43,849 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:56:43,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:43,850 INFO L85 PathProgramCache]: Analyzing trace with hash 1319012330, now seen corresponding path program 4 times [2024-06-27 17:56:43,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:43,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107238813] [2024-06-27 17:56:43,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:43,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:43,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:43,952 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 17:56:43,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:43,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107238813] [2024-06-27 17:56:43,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107238813] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:43,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:43,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:56:43,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840688038] [2024-06-27 17:56:43,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:43,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:56:43,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:43,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:56:43,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:56:43,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:56:43,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 413 transitions, 7776 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states 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 17:56:43,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:43,985 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:56:43,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:45,110 INFO L124 PetriNetUnfolderBase]: 4070/6922 cut-off events. [2024-06-27 17:56:45,110 INFO L125 PetriNetUnfolderBase]: For 351938/352023 co-relation queries the response was YES. [2024-06-27 17:56:45,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44775 conditions, 6922 events. 4070/6922 cut-off events. For 351938/352023 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 49346 event pairs, 1233 based on Foata normal form. 22/6690 useless extension candidates. Maximal degree in co-relation 44626. Up to 6041 conditions per place. [2024-06-27 17:56:45,182 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 381 selfloop transitions, 41 changer transitions 0/438 dead transitions. [2024-06-27 17:56:45,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 438 transitions, 8959 flow [2024-06-27 17:56:45,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:56:45,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:56:45,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 212 transitions. [2024-06-27 17:56:45,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5760869565217391 [2024-06-27 17:56:45,183 INFO L175 Difference]: Start difference. First operand has 318 places, 413 transitions, 7776 flow. Second operand 8 states and 212 transitions. [2024-06-27 17:56:45,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 438 transitions, 8959 flow [2024-06-27 17:56:46,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 438 transitions, 8657 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-27 17:56:46,382 INFO L231 Difference]: Finished difference. Result has 323 places, 419 transitions, 7714 flow [2024-06-27 17:56:46,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7483, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7714, PETRI_PLACES=323, PETRI_TRANSITIONS=419} [2024-06-27 17:56:46,383 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 273 predicate places. [2024-06-27 17:56:46,383 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 419 transitions, 7714 flow [2024-06-27 17:56:46,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states 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 17:56:46,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:46,384 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:46,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-27 17:56:46,384 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:56:46,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:46,384 INFO L85 PathProgramCache]: Analyzing trace with hash 119190535, now seen corresponding path program 1 times [2024-06-27 17:56:46,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:46,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322209860] [2024-06-27 17:56:46,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:46,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:46,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:46,466 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 17:56:46,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:46,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322209860] [2024-06-27 17:56:46,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322209860] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:46,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:46,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:56:46,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080291433] [2024-06-27 17:56:46,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:46,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:56:46,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:46,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:56:46,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:56:46,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:56:46,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 419 transitions, 7714 flow. Second operand has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 7 states have internal predecessors, (141), 0 states have call successors, (0), 0 states 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 17:56:46,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:46,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:56:46,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:47,563 INFO L124 PetriNetUnfolderBase]: 4113/6992 cut-off events. [2024-06-27 17:56:47,563 INFO L125 PetriNetUnfolderBase]: For 369994/370133 co-relation queries the response was YES. [2024-06-27 17:56:47,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45330 conditions, 6992 events. 4113/6992 cut-off events. For 369994/370133 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 49932 event pairs, 1255 based on Foata normal form. 54/6786 useless extension candidates. Maximal degree in co-relation 45179. Up to 5849 conditions per place. [2024-06-27 17:56:47,646 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 292 selfloop transitions, 147 changer transitions 0/455 dead transitions. [2024-06-27 17:56:47,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 455 transitions, 9242 flow [2024-06-27 17:56:47,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:56:47,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:56:47,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 198 transitions. [2024-06-27 17:56:47,647 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6149068322981367 [2024-06-27 17:56:47,647 INFO L175 Difference]: Start difference. First operand has 323 places, 419 transitions, 7714 flow. Second operand 7 states and 198 transitions. [2024-06-27 17:56:47,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 455 transitions, 9242 flow [2024-06-27 17:56:49,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 455 transitions, 9112 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-27 17:56:49,181 INFO L231 Difference]: Finished difference. Result has 324 places, 431 transitions, 8144 flow [2024-06-27 17:56:49,181 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7584, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8144, PETRI_PLACES=324, PETRI_TRANSITIONS=431} [2024-06-27 17:56:49,181 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 274 predicate places. [2024-06-27 17:56:49,182 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 431 transitions, 8144 flow [2024-06-27 17:56:49,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 7 states have internal predecessors, (141), 0 states have call successors, (0), 0 states 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 17:56:49,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:49,182 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:49,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-27 17:56:49,182 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:56:49,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:49,182 INFO L85 PathProgramCache]: Analyzing trace with hash 122915185, now seen corresponding path program 2 times [2024-06-27 17:56:49,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:49,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428097869] [2024-06-27 17:56:49,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:49,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:49,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:49,279 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 17:56:49,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:49,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428097869] [2024-06-27 17:56:49,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428097869] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:49,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:49,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:56:49,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149921165] [2024-06-27 17:56:49,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:49,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:56:49,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:49,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:56:49,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:56:49,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:56:49,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 431 transitions, 8144 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states 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 17:56:49,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:49,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:56:49,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:50,437 INFO L124 PetriNetUnfolderBase]: 4127/7010 cut-off events. [2024-06-27 17:56:50,437 INFO L125 PetriNetUnfolderBase]: For 382767/382901 co-relation queries the response was YES. [2024-06-27 17:56:50,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45968 conditions, 7010 events. 4127/7010 cut-off events. For 382767/382901 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 49939 event pairs, 1254 based on Foata normal form. 45/6792 useless extension candidates. Maximal degree in co-relation 45816. Up to 5864 conditions per place. [2024-06-27 17:56:50,518 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 299 selfloop transitions, 149 changer transitions 0/464 dead transitions. [2024-06-27 17:56:50,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 464 transitions, 9582 flow [2024-06-27 17:56:50,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:56:50,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:56:50,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 264 transitions. [2024-06-27 17:56:50,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5739130434782609 [2024-06-27 17:56:50,519 INFO L175 Difference]: Start difference. First operand has 324 places, 431 transitions, 8144 flow. Second operand 10 states and 264 transitions. [2024-06-27 17:56:50,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 464 transitions, 9582 flow [2024-06-27 17:56:51,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 464 transitions, 9398 flow, removed 21 selfloop flow, removed 2 redundant places. [2024-06-27 17:56:51,788 INFO L231 Difference]: Finished difference. Result has 332 places, 437 transitions, 8406 flow [2024-06-27 17:56:51,788 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7970, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=431, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8406, PETRI_PLACES=332, PETRI_TRANSITIONS=437} [2024-06-27 17:56:51,788 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 282 predicate places. [2024-06-27 17:56:51,788 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 437 transitions, 8406 flow [2024-06-27 17:56:51,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states 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 17:56:51,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:51,789 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:51,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-27 17:56:51,789 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:56:51,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:51,789 INFO L85 PathProgramCache]: Analyzing trace with hash 1119717639, now seen corresponding path program 3 times [2024-06-27 17:56:51,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:51,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115207274] [2024-06-27 17:56:51,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:51,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:51,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:51,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:56:51,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:51,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115207274] [2024-06-27 17:56:51,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115207274] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:51,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:51,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:56:51,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697627155] [2024-06-27 17:56:51,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:51,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:56:51,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:51,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:56:51,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:56:51,924 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:56:51,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 437 transitions, 8406 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states 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 17:56:51,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:51,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:56:51,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:53,014 INFO L124 PetriNetUnfolderBase]: 4124/7011 cut-off events. [2024-06-27 17:56:53,014 INFO L125 PetriNetUnfolderBase]: For 389627/389749 co-relation queries the response was YES. [2024-06-27 17:56:53,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46002 conditions, 7011 events. 4124/7011 cut-off events. For 389627/389749 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 49997 event pairs, 1261 based on Foata normal form. 34/6783 useless extension candidates. Maximal degree in co-relation 45849. Up to 5861 conditions per place. [2024-06-27 17:56:53,093 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 297 selfloop transitions, 148 changer transitions 0/461 dead transitions. [2024-06-27 17:56:53,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 461 transitions, 9534 flow [2024-06-27 17:56:53,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:56:53,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:56:53,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 221 transitions. [2024-06-27 17:56:53,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6005434782608695 [2024-06-27 17:56:53,094 INFO L175 Difference]: Start difference. First operand has 332 places, 437 transitions, 8406 flow. Second operand 8 states and 221 transitions. [2024-06-27 17:56:53,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 461 transitions, 9534 flow [2024-06-27 17:56:54,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 461 transitions, 9166 flow, removed 34 selfloop flow, removed 7 redundant places. [2024-06-27 17:56:54,496 INFO L231 Difference]: Finished difference. Result has 333 places, 437 transitions, 8340 flow [2024-06-27 17:56:54,496 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=8038, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8340, PETRI_PLACES=333, PETRI_TRANSITIONS=437} [2024-06-27 17:56:54,496 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 283 predicate places. [2024-06-27 17:56:54,496 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 437 transitions, 8340 flow [2024-06-27 17:56:54,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states 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 17:56:54,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:54,496 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:54,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-27 17:56:54,496 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:56:54,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:54,497 INFO L85 PathProgramCache]: Analyzing trace with hash -1575203531, now seen corresponding path program 4 times [2024-06-27 17:56:54,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:54,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123080512] [2024-06-27 17:56:54,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:54,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:54,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:54,592 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 17:56:54,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:54,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123080512] [2024-06-27 17:56:54,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123080512] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:54,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:54,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:56:54,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558764336] [2024-06-27 17:56:54,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:54,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:56:54,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:54,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:56:54,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:56:54,623 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:56:54,623 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 437 transitions, 8340 flow. Second operand has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 7 states have internal predecessors, (141), 0 states have call successors, (0), 0 states 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 17:56:54,623 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:54,623 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:56:54,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:55,690 INFO L124 PetriNetUnfolderBase]: 4136/7018 cut-off events. [2024-06-27 17:56:55,690 INFO L125 PetriNetUnfolderBase]: For 396558/396646 co-relation queries the response was YES. [2024-06-27 17:56:55,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46181 conditions, 7018 events. 4136/7018 cut-off events. For 396558/396646 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 50000 event pairs, 1226 based on Foata normal form. 23/6770 useless extension candidates. Maximal degree in co-relation 46027. Up to 6080 conditions per place. [2024-06-27 17:56:55,773 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 376 selfloop transitions, 73 changer transitions 0/465 dead transitions. [2024-06-27 17:56:55,773 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 465 transitions, 9642 flow [2024-06-27 17:56:55,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:56:55,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:56:55,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 240 transitions. [2024-06-27 17:56:55,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5797101449275363 [2024-06-27 17:56:55,774 INFO L175 Difference]: Start difference. First operand has 333 places, 437 transitions, 8340 flow. Second operand 9 states and 240 transitions. [2024-06-27 17:56:55,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 465 transitions, 9642 flow [2024-06-27 17:56:57,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 465 transitions, 9336 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 17:56:57,336 INFO L231 Difference]: Finished difference. Result has 335 places, 443 transitions, 8328 flow [2024-06-27 17:56:57,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=8044, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=370, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8328, PETRI_PLACES=335, PETRI_TRANSITIONS=443} [2024-06-27 17:56:57,337 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 285 predicate places. [2024-06-27 17:56:57,337 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 443 transitions, 8328 flow [2024-06-27 17:56:57,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 7 states have internal predecessors, (141), 0 states have call successors, (0), 0 states 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 17:56:57,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:57,337 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:57,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-27 17:56:57,337 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:56:57,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:57,337 INFO L85 PathProgramCache]: Analyzing trace with hash -50102433, now seen corresponding path program 5 times [2024-06-27 17:56:57,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:57,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929908368] [2024-06-27 17:56:57,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:57,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:57,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:57,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:56:57,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:57,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929908368] [2024-06-27 17:56:57,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929908368] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:57,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:57,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:56:57,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450800226] [2024-06-27 17:56:57,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:57,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:56:57,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:57,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:56:57,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:56:57,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:56:57,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 443 transitions, 8328 flow. Second operand has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 7 states have internal predecessors, (141), 0 states have call successors, (0), 0 states 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 17:56:57,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:57,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:56:57,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:58,679 INFO L124 PetriNetUnfolderBase]: 4130/7012 cut-off events. [2024-06-27 17:56:58,679 INFO L125 PetriNetUnfolderBase]: For 395453/395541 co-relation queries the response was YES. [2024-06-27 17:56:58,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45792 conditions, 7012 events. 4130/7012 cut-off events. For 395453/395541 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 49916 event pairs, 1226 based on Foata normal form. 19/6760 useless extension candidates. Maximal degree in co-relation 45637. Up to 6074 conditions per place. [2024-06-27 17:56:58,760 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 376 selfloop transitions, 71 changer transitions 0/463 dead transitions. [2024-06-27 17:56:58,760 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 463 transitions, 9324 flow [2024-06-27 17:56:58,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:56:58,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:56:58,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 217 transitions. [2024-06-27 17:56:58,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5896739130434783 [2024-06-27 17:56:58,761 INFO L175 Difference]: Start difference. First operand has 335 places, 443 transitions, 8328 flow. Second operand 8 states and 217 transitions. [2024-06-27 17:56:58,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 463 transitions, 9324 flow [2024-06-27 17:57:00,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 463 transitions, 9188 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-27 17:57:00,319 INFO L231 Difference]: Finished difference. Result has 337 places, 443 transitions, 8344 flow [2024-06-27 17:57:00,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=8192, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=443, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8344, PETRI_PLACES=337, PETRI_TRANSITIONS=443} [2024-06-27 17:57:00,319 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 287 predicate places. [2024-06-27 17:57:00,320 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 443 transitions, 8344 flow [2024-06-27 17:57:00,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 7 states have internal predecessors, (141), 0 states have call successors, (0), 0 states 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 17:57:00,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:00,320 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:00,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-27 17:57:00,320 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:00,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:00,320 INFO L85 PathProgramCache]: Analyzing trace with hash 794448450, now seen corresponding path program 5 times [2024-06-27 17:57:00,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:00,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171829871] [2024-06-27 17:57:00,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:00,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:00,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:00,393 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 17:57:00,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:00,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171829871] [2024-06-27 17:57:00,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171829871] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:00,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:00,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:57:00,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706216605] [2024-06-27 17:57:00,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:00,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:57:00,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:00,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:57:00,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:57:00,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:57:00,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 443 transitions, 8344 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states 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 17:57:00,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:00,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:57:00,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:01,489 INFO L124 PetriNetUnfolderBase]: 4139/7009 cut-off events. [2024-06-27 17:57:01,489 INFO L125 PetriNetUnfolderBase]: For 404434/404538 co-relation queries the response was YES. [2024-06-27 17:57:01,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46001 conditions, 7009 events. 4139/7009 cut-off events. For 404434/404538 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 49854 event pairs, 1286 based on Foata normal form. 50/6769 useless extension candidates. Maximal degree in co-relation 45845. Up to 5682 conditions per place. [2024-06-27 17:57:01,581 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 294 selfloop transitions, 163 changer transitions 0/473 dead transitions. [2024-06-27 17:57:01,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 473 transitions, 10008 flow [2024-06-27 17:57:01,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:57:01,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:57:01,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 198 transitions. [2024-06-27 17:57:01,582 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6149068322981367 [2024-06-27 17:57:01,582 INFO L175 Difference]: Start difference. First operand has 337 places, 443 transitions, 8344 flow. Second operand 7 states and 198 transitions. [2024-06-27 17:57:01,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 473 transitions, 10008 flow [2024-06-27 17:57:02,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 473 transitions, 9806 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-27 17:57:02,961 INFO L231 Difference]: Finished difference. Result has 335 places, 449 transitions, 8653 flow [2024-06-27 17:57:02,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=8142, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=443, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8653, PETRI_PLACES=335, PETRI_TRANSITIONS=449} [2024-06-27 17:57:02,961 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 285 predicate places. [2024-06-27 17:57:02,961 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 449 transitions, 8653 flow [2024-06-27 17:57:02,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states 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 17:57:02,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:02,961 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:02,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-27 17:57:02,962 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:02,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:02,962 INFO L85 PathProgramCache]: Analyzing trace with hash 1847398378, now seen corresponding path program 6 times [2024-06-27 17:57:02,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:02,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40529815] [2024-06-27 17:57:02,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:02,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:02,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:03,040 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 17:57:03,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:03,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40529815] [2024-06-27 17:57:03,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40529815] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:03,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:03,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:57:03,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211474243] [2024-06-27 17:57:03,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:03,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:57:03,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:03,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:57:03,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:57:03,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:57:03,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 449 transitions, 8653 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states 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 17:57:03,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:03,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:57:03,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:04,402 INFO L124 PetriNetUnfolderBase]: 4145/7024 cut-off events. [2024-06-27 17:57:04,402 INFO L125 PetriNetUnfolderBase]: For 417156/417257 co-relation queries the response was YES. [2024-06-27 17:57:04,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46668 conditions, 7024 events. 4145/7024 cut-off events. For 417156/417257 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 50120 event pairs, 1293 based on Foata normal form. 50/6784 useless extension candidates. Maximal degree in co-relation 46511. Up to 5687 conditions per place. [2024-06-27 17:57:04,486 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 293 selfloop transitions, 164 changer transitions 0/473 dead transitions. [2024-06-27 17:57:04,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 473 transitions, 10229 flow [2024-06-27 17:57:04,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:57:04,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:57:04,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 196 transitions. [2024-06-27 17:57:04,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6086956521739131 [2024-06-27 17:57:04,487 INFO L175 Difference]: Start difference. First operand has 335 places, 449 transitions, 8653 flow. Second operand 7 states and 196 transitions. [2024-06-27 17:57:04,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 473 transitions, 10229 flow [2024-06-27 17:57:06,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 473 transitions, 10010 flow, removed 65 selfloop flow, removed 3 redundant places. [2024-06-27 17:57:06,433 INFO L231 Difference]: Finished difference. Result has 339 places, 452 transitions, 8862 flow [2024-06-27 17:57:06,433 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=8462, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=449, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8862, PETRI_PLACES=339, PETRI_TRANSITIONS=452} [2024-06-27 17:57:06,434 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 289 predicate places. [2024-06-27 17:57:06,434 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 452 transitions, 8862 flow [2024-06-27 17:57:06,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states 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 17:57:06,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:06,434 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:06,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-27 17:57:06,435 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:06,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:06,435 INFO L85 PathProgramCache]: Analyzing trace with hash -182644158, now seen corresponding path program 7 times [2024-06-27 17:57:06,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:06,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782694199] [2024-06-27 17:57:06,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:06,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:06,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:06,527 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 17:57:06,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:06,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782694199] [2024-06-27 17:57:06,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782694199] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:06,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:06,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:57:06,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469198652] [2024-06-27 17:57:06,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:06,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:57:06,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:06,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:57:06,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:57:06,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:57:06,571 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 452 transitions, 8862 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states 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 17:57:06,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:06,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:57:06,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:07,699 INFO L124 PetriNetUnfolderBase]: 4151/7029 cut-off events. [2024-06-27 17:57:07,699 INFO L125 PetriNetUnfolderBase]: For 427171/427277 co-relation queries the response was YES. [2024-06-27 17:57:07,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47143 conditions, 7029 events. 4151/7029 cut-off events. For 427171/427277 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 50040 event pairs, 1286 based on Foata normal form. 52/6790 useless extension candidates. Maximal degree in co-relation 46984. Up to 5692 conditions per place. [2024-06-27 17:57:07,784 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 284 selfloop transitions, 172 changer transitions 0/472 dead transitions. [2024-06-27 17:57:07,784 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 472 transitions, 10236 flow [2024-06-27 17:57:07,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:57:07,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:57:07,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 191 transitions. [2024-06-27 17:57:07,785 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.593167701863354 [2024-06-27 17:57:07,785 INFO L175 Difference]: Start difference. First operand has 339 places, 452 transitions, 8862 flow. Second operand 7 states and 191 transitions. [2024-06-27 17:57:07,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 472 transitions, 10236 flow [2024-06-27 17:57:09,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 472 transitions, 9885 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-27 17:57:09,542 INFO L231 Difference]: Finished difference. Result has 342 places, 455 transitions, 8933 flow [2024-06-27 17:57:09,542 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=8514, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8933, PETRI_PLACES=342, PETRI_TRANSITIONS=455} [2024-06-27 17:57:09,542 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 292 predicate places. [2024-06-27 17:57:09,542 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 455 transitions, 8933 flow [2024-06-27 17:57:09,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states 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 17:57:09,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:09,543 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:09,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-27 17:57:09,543 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:09,543 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:09,543 INFO L85 PathProgramCache]: Analyzing trace with hash 137924364, now seen corresponding path program 8 times [2024-06-27 17:57:09,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:09,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383873820] [2024-06-27 17:57:09,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:09,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:09,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:09,651 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 17:57:09,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:09,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383873820] [2024-06-27 17:57:09,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383873820] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:09,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:09,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:57:09,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080968164] [2024-06-27 17:57:09,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:09,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:57:09,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:09,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:57:09,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:57:09,696 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:57:09,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 455 transitions, 8933 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states 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 17:57:09,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:09,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:57:09,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:10,964 INFO L124 PetriNetUnfolderBase]: 4156/7050 cut-off events. [2024-06-27 17:57:10,964 INFO L125 PetriNetUnfolderBase]: For 429287/429386 co-relation queries the response was YES. [2024-06-27 17:57:11,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47330 conditions, 7050 events. 4156/7050 cut-off events. For 429287/429386 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 50340 event pairs, 1223 based on Foata normal form. 24/6798 useless extension candidates. Maximal degree in co-relation 47170. Up to 5861 conditions per place. [2024-06-27 17:57:11,045 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 329 selfloop transitions, 145 changer transitions 0/490 dead transitions. [2024-06-27 17:57:11,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 490 transitions, 10230 flow [2024-06-27 17:57:11,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:57:11,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:57:11,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 229 transitions. [2024-06-27 17:57:11,046 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6222826086956522 [2024-06-27 17:57:11,046 INFO L175 Difference]: Start difference. First operand has 342 places, 455 transitions, 8933 flow. Second operand 8 states and 229 transitions. [2024-06-27 17:57:11,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 490 transitions, 10230 flow [2024-06-27 17:57:12,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 490 transitions, 9987 flow, removed 41 selfloop flow, removed 3 redundant places. [2024-06-27 17:57:12,459 INFO L231 Difference]: Finished difference. Result has 348 places, 458 transitions, 9172 flow [2024-06-27 17:57:12,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=8693, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=455, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9172, PETRI_PLACES=348, PETRI_TRANSITIONS=458} [2024-06-27 17:57:12,459 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 298 predicate places. [2024-06-27 17:57:12,459 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 458 transitions, 9172 flow [2024-06-27 17:57:12,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states 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 17:57:12,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:12,460 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:12,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-27 17:57:12,460 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:12,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:12,460 INFO L85 PathProgramCache]: Analyzing trace with hash -1186361662, now seen corresponding path program 9 times [2024-06-27 17:57:12,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:12,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437152873] [2024-06-27 17:57:12,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:12,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:12,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:12,555 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 17:57:12,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:12,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437152873] [2024-06-27 17:57:12,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437152873] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:12,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:12,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:57:12,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044000226] [2024-06-27 17:57:12,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:12,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:57:12,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:12,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:57:12,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:57:12,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:57:12,597 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 458 transitions, 9172 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states 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 17:57:12,597 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:12,597 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:57:12,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:13,887 INFO L124 PetriNetUnfolderBase]: 4153/7042 cut-off events. [2024-06-27 17:57:13,887 INFO L125 PetriNetUnfolderBase]: For 440656/440753 co-relation queries the response was YES. [2024-06-27 17:57:13,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47676 conditions, 7042 events. 4153/7042 cut-off events. For 440656/440753 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 50245 event pairs, 1235 based on Foata normal form. 24/6783 useless extension candidates. Maximal degree in co-relation 47513. Up to 5859 conditions per place. [2024-06-27 17:57:13,972 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 320 selfloop transitions, 148 changer transitions 0/484 dead transitions. [2024-06-27 17:57:13,972 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 484 transitions, 10370 flow [2024-06-27 17:57:13,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:57:13,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:57:13,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 201 transitions. [2024-06-27 17:57:13,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6242236024844721 [2024-06-27 17:57:13,973 INFO L175 Difference]: Start difference. First operand has 348 places, 458 transitions, 9172 flow. Second operand 7 states and 201 transitions. [2024-06-27 17:57:13,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 484 transitions, 10370 flow [2024-06-27 17:57:15,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 484 transitions, 10081 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-27 17:57:15,939 INFO L231 Difference]: Finished difference. Result has 348 places, 458 transitions, 9195 flow [2024-06-27 17:57:15,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=8885, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=458, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9195, PETRI_PLACES=348, PETRI_TRANSITIONS=458} [2024-06-27 17:57:15,940 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 298 predicate places. [2024-06-27 17:57:15,940 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 458 transitions, 9195 flow [2024-06-27 17:57:15,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states 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 17:57:15,940 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:15,940 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:15,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-27 17:57:15,940 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:15,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:15,941 INFO L85 PathProgramCache]: Analyzing trace with hash 804936649, now seen corresponding path program 6 times [2024-06-27 17:57:15,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:15,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347852274] [2024-06-27 17:57:15,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:15,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:15,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:16,023 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 17:57:16,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:16,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347852274] [2024-06-27 17:57:16,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347852274] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:16,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:16,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:57:16,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528624537] [2024-06-27 17:57:16,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:16,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:57:16,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:16,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:57:16,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:57:16,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:57:16,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 458 transitions, 9195 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states 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 17:57:16,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:16,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:57:16,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:17,373 INFO L124 PetriNetUnfolderBase]: 4172/7075 cut-off events. [2024-06-27 17:57:17,374 INFO L125 PetriNetUnfolderBase]: For 451706/451829 co-relation queries the response was YES. [2024-06-27 17:57:17,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48060 conditions, 7075 events. 4172/7075 cut-off events. For 451706/451829 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 50449 event pairs, 1282 based on Foata normal form. 31/6831 useless extension candidates. Maximal degree in co-relation 47896. Up to 5920 conditions per place. [2024-06-27 17:57:17,452 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 307 selfloop transitions, 166 changer transitions 0/489 dead transitions. [2024-06-27 17:57:17,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 489 transitions, 10701 flow [2024-06-27 17:57:17,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:57:17,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:57:17,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 260 transitions. [2024-06-27 17:57:17,455 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5652173913043478 [2024-06-27 17:57:17,456 INFO L175 Difference]: Start difference. First operand has 348 places, 458 transitions, 9195 flow. Second operand 10 states and 260 transitions. [2024-06-27 17:57:17,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 489 transitions, 10701 flow [2024-06-27 17:57:19,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 489 transitions, 10409 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 17:57:19,419 INFO L231 Difference]: Finished difference. Result has 351 places, 464 transitions, 9373 flow [2024-06-27 17:57:19,419 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=8903, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=458, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9373, PETRI_PLACES=351, PETRI_TRANSITIONS=464} [2024-06-27 17:57:19,420 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 301 predicate places. [2024-06-27 17:57:19,420 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 464 transitions, 9373 flow [2024-06-27 17:57:19,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states 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 17:57:19,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:19,420 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:19,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-27 17:57:19,421 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:19,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:19,421 INFO L85 PathProgramCache]: Analyzing trace with hash -762437475, now seen corresponding path program 7 times [2024-06-27 17:57:19,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:19,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491255550] [2024-06-27 17:57:19,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:19,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:19,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:19,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:19,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:19,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491255550] [2024-06-27 17:57:19,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491255550] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:19,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:19,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:57:19,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331450007] [2024-06-27 17:57:19,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:19,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:57:19,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:19,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:57:19,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:57:19,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:57:19,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 464 transitions, 9373 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states 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 17:57:19,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:19,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:57:19,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:20,761 INFO L124 PetriNetUnfolderBase]: 4169/7076 cut-off events. [2024-06-27 17:57:20,762 INFO L125 PetriNetUnfolderBase]: For 456238/456349 co-relation queries the response was YES. [2024-06-27 17:57:20,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47987 conditions, 7076 events. 4169/7076 cut-off events. For 456238/456349 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 50569 event pairs, 1289 based on Foata normal form. 20/6822 useless extension candidates. Maximal degree in co-relation 47822. Up to 5917 conditions per place. [2024-06-27 17:57:20,850 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 305 selfloop transitions, 165 changer transitions 0/486 dead transitions. [2024-06-27 17:57:20,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 486 transitions, 10563 flow [2024-06-27 17:57:20,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:57:20,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:57:20,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 217 transitions. [2024-06-27 17:57:20,851 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5896739130434783 [2024-06-27 17:57:20,851 INFO L175 Difference]: Start difference. First operand has 351 places, 464 transitions, 9373 flow. Second operand 8 states and 217 transitions. [2024-06-27 17:57:20,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 486 transitions, 10563 flow [2024-06-27 17:57:22,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 486 transitions, 10165 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-27 17:57:22,827 INFO L231 Difference]: Finished difference. Result has 353 places, 464 transitions, 9311 flow [2024-06-27 17:57:22,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=8975, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9311, PETRI_PLACES=353, PETRI_TRANSITIONS=464} [2024-06-27 17:57:22,828 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 303 predicate places. [2024-06-27 17:57:22,828 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 464 transitions, 9311 flow [2024-06-27 17:57:22,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states 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 17:57:22,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:22,828 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:22,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-27 17:57:22,829 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:22,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:22,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1242541279, now seen corresponding path program 8 times [2024-06-27 17:57:22,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:22,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708239586] [2024-06-27 17:57:22,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:22,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:22,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:22,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:22,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:22,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708239586] [2024-06-27 17:57:22,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708239586] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:22,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:22,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:57:22,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053155131] [2024-06-27 17:57:22,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:22,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:57:22,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:22,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:57:22,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:57:22,956 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:57:22,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 464 transitions, 9311 flow. Second operand has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 7 states have internal predecessors, (141), 0 states have call successors, (0), 0 states 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 17:57:22,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:22,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:57:22,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:24,163 INFO L124 PetriNetUnfolderBase]: 4176/7093 cut-off events. [2024-06-27 17:57:24,163 INFO L125 PetriNetUnfolderBase]: For 466317/466433 co-relation queries the response was YES. [2024-06-27 17:57:24,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48108 conditions, 7093 events. 4176/7093 cut-off events. For 466317/466433 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 50658 event pairs, 1285 based on Foata normal form. 42/6851 useless extension candidates. Maximal degree in co-relation 47942. Up to 5925 conditions per place. [2024-06-27 17:57:24,246 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 312 selfloop transitions, 162 changer transitions 0/490 dead transitions. [2024-06-27 17:57:24,246 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 490 transitions, 10789 flow [2024-06-27 17:57:24,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:57:24,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:57:24,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 194 transitions. [2024-06-27 17:57:24,247 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6024844720496895 [2024-06-27 17:57:24,247 INFO L175 Difference]: Start difference. First operand has 353 places, 464 transitions, 9311 flow. Second operand 7 states and 194 transitions. [2024-06-27 17:57:24,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 490 transitions, 10789 flow [2024-06-27 17:57:26,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 490 transitions, 10568 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 17:57:26,492 INFO L231 Difference]: Finished difference. Result has 354 places, 468 transitions, 9520 flow [2024-06-27 17:57:26,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=9094, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9520, PETRI_PLACES=354, PETRI_TRANSITIONS=468} [2024-06-27 17:57:26,493 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 304 predicate places. [2024-06-27 17:57:26,493 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 468 transitions, 9520 flow [2024-06-27 17:57:26,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 7 states have internal predecessors, (141), 0 states have call successors, (0), 0 states 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 17:57:26,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:26,494 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:26,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-27 17:57:26,494 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:26,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:26,494 INFO L85 PathProgramCache]: Analyzing trace with hash 1808716329, now seen corresponding path program 9 times [2024-06-27 17:57:26,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:26,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764050401] [2024-06-27 17:57:26,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:26,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:26,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:26,575 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 17:57:26,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:26,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764050401] [2024-06-27 17:57:26,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764050401] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:26,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:26,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:57:26,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703265229] [2024-06-27 17:57:26,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:26,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:57:26,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:26,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:57:26,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:57:26,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:57:26,625 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 468 transitions, 9520 flow. Second operand has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 7 states have internal predecessors, (141), 0 states have call successors, (0), 0 states 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 17:57:26,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:26,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:57:26,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:27,853 INFO L124 PetriNetUnfolderBase]: 4193/7119 cut-off events. [2024-06-27 17:57:27,853 INFO L125 PetriNetUnfolderBase]: For 482200/482312 co-relation queries the response was YES. [2024-06-27 17:57:27,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48598 conditions, 7119 events. 4193/7119 cut-off events. For 482200/482312 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 50916 event pairs, 1285 based on Foata normal form. 38/6869 useless extension candidates. Maximal degree in co-relation 48430. Up to 5944 conditions per place. [2024-06-27 17:57:27,940 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 310 selfloop transitions, 167 changer transitions 0/493 dead transitions. [2024-06-27 17:57:27,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 493 transitions, 11050 flow [2024-06-27 17:57:27,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:57:27,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:57:27,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 192 transitions. [2024-06-27 17:57:27,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5962732919254659 [2024-06-27 17:57:27,941 INFO L175 Difference]: Start difference. First operand has 354 places, 468 transitions, 9520 flow. Second operand 7 states and 192 transitions. [2024-06-27 17:57:27,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 493 transitions, 11050 flow [2024-06-27 17:57:29,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 493 transitions, 10745 flow, removed 39 selfloop flow, removed 3 redundant places. [2024-06-27 17:57:29,900 INFO L231 Difference]: Finished difference. Result has 358 places, 474 transitions, 9709 flow [2024-06-27 17:57:29,900 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=9237, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9709, PETRI_PLACES=358, PETRI_TRANSITIONS=474} [2024-06-27 17:57:29,900 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 308 predicate places. [2024-06-27 17:57:29,900 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 474 transitions, 9709 flow [2024-06-27 17:57:29,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 7 states have internal predecessors, (141), 0 states have call successors, (0), 0 states 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 17:57:29,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:29,900 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:29,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-27 17:57:29,901 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:29,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:29,901 INFO L85 PathProgramCache]: Analyzing trace with hash 1808729349, now seen corresponding path program 10 times [2024-06-27 17:57:29,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:29,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677206223] [2024-06-27 17:57:29,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:29,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:29,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:29,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:29,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:29,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677206223] [2024-06-27 17:57:29,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677206223] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:29,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:29,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:57:29,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592537881] [2024-06-27 17:57:29,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:29,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:57:29,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:29,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:57:29,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:57:30,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:57:30,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 474 transitions, 9709 flow. Second operand has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 7 states have internal predecessors, (141), 0 states have call successors, (0), 0 states 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 17:57:30,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:30,018 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:57:30,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:31,260 INFO L124 PetriNetUnfolderBase]: 4193/7121 cut-off events. [2024-06-27 17:57:31,260 INFO L125 PetriNetUnfolderBase]: For 487529/487666 co-relation queries the response was YES. [2024-06-27 17:57:31,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48539 conditions, 7121 events. 4193/7121 cut-off events. For 487529/487666 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 50866 event pairs, 1258 based on Foata normal form. 36/6875 useless extension candidates. Maximal degree in co-relation 48369. Up to 6228 conditions per place. [2024-06-27 17:57:31,343 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 433 selfloop transitions, 39 changer transitions 0/488 dead transitions. [2024-06-27 17:57:31,343 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 488 transitions, 10693 flow [2024-06-27 17:57:31,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:57:31,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:57:31,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 185 transitions. [2024-06-27 17:57:31,344 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5745341614906833 [2024-06-27 17:57:31,344 INFO L175 Difference]: Start difference. First operand has 358 places, 474 transitions, 9709 flow. Second operand 7 states and 185 transitions. [2024-06-27 17:57:31,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 488 transitions, 10693 flow [2024-06-27 17:57:33,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 488 transitions, 10488 flow, removed 26 selfloop flow, removed 2 redundant places. [2024-06-27 17:57:33,647 INFO L231 Difference]: Finished difference. Result has 363 places, 474 transitions, 9588 flow [2024-06-27 17:57:33,648 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=9504, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=474, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=435, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9588, PETRI_PLACES=363, PETRI_TRANSITIONS=474} [2024-06-27 17:57:33,648 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 313 predicate places. [2024-06-27 17:57:33,648 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 474 transitions, 9588 flow [2024-06-27 17:57:33,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 7 states have internal predecessors, (141), 0 states have call successors, (0), 0 states 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 17:57:33,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:33,649 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:33,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-27 17:57:33,649 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:33,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:33,649 INFO L85 PathProgramCache]: Analyzing trace with hash 889771205, now seen corresponding path program 11 times [2024-06-27 17:57:33,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:33,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115678975] [2024-06-27 17:57:33,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:33,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:33,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:33,745 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 17:57:33,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:33,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115678975] [2024-06-27 17:57:33,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115678975] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:33,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:33,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:57:33,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953857488] [2024-06-27 17:57:33,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:33,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:57:33,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:33,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:57:33,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:57:33,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:57:33,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 474 transitions, 9588 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states 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 17:57:33,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:33,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:57:33,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:34,973 INFO L124 PetriNetUnfolderBase]: 4207/7134 cut-off events. [2024-06-27 17:57:34,973 INFO L125 PetriNetUnfolderBase]: For 495977/496103 co-relation queries the response was YES. [2024-06-27 17:57:35,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48426 conditions, 7134 events. 4207/7134 cut-off events. For 495977/496103 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 50944 event pairs, 1251 based on Foata normal form. 23/6870 useless extension candidates. Maximal degree in co-relation 48254. Up to 6245 conditions per place. [2024-06-27 17:57:35,065 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 434 selfloop transitions, 45 changer transitions 0/495 dead transitions. [2024-06-27 17:57:35,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 495 transitions, 10712 flow [2024-06-27 17:57:35,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:57:35,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:57:35,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 209 transitions. [2024-06-27 17:57:35,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5679347826086957 [2024-06-27 17:57:35,066 INFO L175 Difference]: Start difference. First operand has 363 places, 474 transitions, 9588 flow. Second operand 8 states and 209 transitions. [2024-06-27 17:57:35,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 495 transitions, 10712 flow [2024-06-27 17:57:37,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 495 transitions, 10603 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-27 17:57:37,375 INFO L231 Difference]: Finished difference. Result has 365 places, 480 transitions, 9705 flow [2024-06-27 17:57:37,375 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=9485, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=474, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9705, PETRI_PLACES=365, PETRI_TRANSITIONS=480} [2024-06-27 17:57:37,375 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 315 predicate places. [2024-06-27 17:57:37,375 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 480 transitions, 9705 flow [2024-06-27 17:57:37,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states 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 17:57:37,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:37,376 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:37,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-27 17:57:37,376 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:37,376 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:37,376 INFO L85 PathProgramCache]: Analyzing trace with hash 859842929, now seen corresponding path program 12 times [2024-06-27 17:57:37,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:37,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292180315] [2024-06-27 17:57:37,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:37,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:37,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:37,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:37,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:37,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292180315] [2024-06-27 17:57:37,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292180315] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:37,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:37,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:57:37,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924437122] [2024-06-27 17:57:37,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:37,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:57:37,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:37,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:57:37,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:57:37,500 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:57:37,500 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 480 transitions, 9705 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states 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 17:57:37,500 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:37,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:57:37,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:38,764 INFO L124 PetriNetUnfolderBase]: 4231/7162 cut-off events. [2024-06-27 17:57:38,764 INFO L125 PetriNetUnfolderBase]: For 513541/513641 co-relation queries the response was YES. [2024-06-27 17:57:38,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48998 conditions, 7162 events. 4231/7162 cut-off events. For 513541/513641 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 51081 event pairs, 1276 based on Foata normal form. 24/6886 useless extension candidates. Maximal degree in co-relation 48825. Up to 5985 conditions per place. [2024-06-27 17:57:38,854 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 303 selfloop transitions, 194 changer transitions 0/513 dead transitions. [2024-06-27 17:57:38,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 513 transitions, 11548 flow [2024-06-27 17:57:38,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 17:57:38,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 17:57:38,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 284 transitions. [2024-06-27 17:57:38,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5612648221343873 [2024-06-27 17:57:38,855 INFO L175 Difference]: Start difference. First operand has 365 places, 480 transitions, 9705 flow. Second operand 11 states and 284 transitions. [2024-06-27 17:57:38,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 513 transitions, 11548 flow [2024-06-27 17:57:41,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 513 transitions, 11432 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-27 17:57:41,185 INFO L231 Difference]: Finished difference. Result has 371 places, 489 transitions, 10202 flow [2024-06-27 17:57:41,186 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=9589, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10202, PETRI_PLACES=371, PETRI_TRANSITIONS=489} [2024-06-27 17:57:41,186 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 321 predicate places. [2024-06-27 17:57:41,186 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 489 transitions, 10202 flow [2024-06-27 17:57:41,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states 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 17:57:41,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:41,186 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:41,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-27 17:57:41,186 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:41,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:41,187 INFO L85 PathProgramCache]: Analyzing trace with hash -1219188549, now seen corresponding path program 13 times [2024-06-27 17:57:41,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:41,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972234665] [2024-06-27 17:57:41,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:41,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:41,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:41,270 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 17:57:41,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:41,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972234665] [2024-06-27 17:57:41,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972234665] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:41,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:41,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:57:41,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81547285] [2024-06-27 17:57:41,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:41,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:57:41,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:41,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:57:41,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:57:41,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:57:41,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 489 transitions, 10202 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states 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 17:57:41,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:41,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:57:41,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:42,551 INFO L124 PetriNetUnfolderBase]: 4228/7158 cut-off events. [2024-06-27 17:57:42,551 INFO L125 PetriNetUnfolderBase]: For 521015/521115 co-relation queries the response was YES. [2024-06-27 17:57:42,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49390 conditions, 7158 events. 4228/7158 cut-off events. For 521015/521115 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 51018 event pairs, 1276 based on Foata normal form. 24/6882 useless extension candidates. Maximal degree in co-relation 49216. Up to 5982 conditions per place. [2024-06-27 17:57:42,641 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 304 selfloop transitions, 192 changer transitions 0/512 dead transitions. [2024-06-27 17:57:42,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 512 transitions, 11828 flow [2024-06-27 17:57:42,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:57:42,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:57:42,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 263 transitions. [2024-06-27 17:57:42,642 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5717391304347826 [2024-06-27 17:57:42,642 INFO L175 Difference]: Start difference. First operand has 371 places, 489 transitions, 10202 flow. Second operand 10 states and 263 transitions. [2024-06-27 17:57:42,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 512 transitions, 11828 flow [2024-06-27 17:57:44,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 512 transitions, 11175 flow, removed 59 selfloop flow, removed 8 redundant places. [2024-06-27 17:57:44,950 INFO L231 Difference]: Finished difference. Result has 373 places, 489 transitions, 9939 flow [2024-06-27 17:57:44,951 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=9549, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=192, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9939, PETRI_PLACES=373, PETRI_TRANSITIONS=489} [2024-06-27 17:57:44,951 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 323 predicate places. [2024-06-27 17:57:44,951 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 489 transitions, 9939 flow [2024-06-27 17:57:44,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states 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 17:57:44,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:44,951 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:44,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-27 17:57:44,952 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:44,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:44,952 INFO L85 PathProgramCache]: Analyzing trace with hash -174362849, now seen corresponding path program 14 times [2024-06-27 17:57:44,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:44,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136694928] [2024-06-27 17:57:44,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:44,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:44,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:45,036 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 17:57:45,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:45,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136694928] [2024-06-27 17:57:45,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136694928] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:45,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:45,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:57:45,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264921234] [2024-06-27 17:57:45,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:45,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:57:45,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:45,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:57:45,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:57:45,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:57:45,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 489 transitions, 9939 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states 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 17:57:45,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:45,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:57:45,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:46,316 INFO L124 PetriNetUnfolderBase]: 4225/7159 cut-off events. [2024-06-27 17:57:46,316 INFO L125 PetriNetUnfolderBase]: For 519245/519342 co-relation queries the response was YES. [2024-06-27 17:57:46,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49117 conditions, 7159 events. 4225/7159 cut-off events. For 519245/519342 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 51068 event pairs, 1283 based on Foata normal form. 24/6884 useless extension candidates. Maximal degree in co-relation 48943. Up to 5979 conditions per place. [2024-06-27 17:57:46,408 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 304 selfloop transitions, 190 changer transitions 0/510 dead transitions. [2024-06-27 17:57:46,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 510 transitions, 11563 flow [2024-06-27 17:57:46,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:57:46,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:57:46,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 217 transitions. [2024-06-27 17:57:46,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5896739130434783 [2024-06-27 17:57:46,409 INFO L175 Difference]: Start difference. First operand has 373 places, 489 transitions, 9939 flow. Second operand 8 states and 217 transitions. [2024-06-27 17:57:46,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 510 transitions, 11563 flow [2024-06-27 17:57:49,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 510 transitions, 11185 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-27 17:57:49,247 INFO L231 Difference]: Finished difference. Result has 375 places, 489 transitions, 9947 flow [2024-06-27 17:57:49,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=9561, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=190, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9947, PETRI_PLACES=375, PETRI_TRANSITIONS=489} [2024-06-27 17:57:49,248 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 325 predicate places. [2024-06-27 17:57:49,248 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 489 transitions, 9947 flow [2024-06-27 17:57:49,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states 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 17:57:49,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:49,248 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:49,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-27 17:57:49,248 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:49,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:49,249 INFO L85 PathProgramCache]: Analyzing trace with hash -168554999, now seen corresponding path program 15 times [2024-06-27 17:57:49,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:49,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689609674] [2024-06-27 17:57:49,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:49,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:49,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:49,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:49,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:49,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689609674] [2024-06-27 17:57:49,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689609674] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:49,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:49,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:57:49,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051529436] [2024-06-27 17:57:49,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:49,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:57:49,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:49,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:57:49,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:57:49,385 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:57:49,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 489 transitions, 9947 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states 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 17:57:49,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:49,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:57:49,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:50,698 INFO L124 PetriNetUnfolderBase]: 4225/7163 cut-off events. [2024-06-27 17:57:50,698 INFO L125 PetriNetUnfolderBase]: For 524218/524343 co-relation queries the response was YES. [2024-06-27 17:57:50,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49141 conditions, 7163 events. 4225/7163 cut-off events. For 524218/524343 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 51141 event pairs, 1251 based on Foata normal form. 23/6893 useless extension candidates. Maximal degree in co-relation 48966. Up to 6258 conditions per place. [2024-06-27 17:57:50,793 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 438 selfloop transitions, 55 changer transitions 0/509 dead transitions. [2024-06-27 17:57:50,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 509 transitions, 11177 flow [2024-06-27 17:57:50,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 17:57:50,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 17:57:50,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 297 transitions. [2024-06-27 17:57:50,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5380434782608695 [2024-06-27 17:57:50,794 INFO L175 Difference]: Start difference. First operand has 375 places, 489 transitions, 9947 flow. Second operand 12 states and 297 transitions. [2024-06-27 17:57:50,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 509 transitions, 11177 flow [2024-06-27 17:57:53,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 509 transitions, 10781 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-27 17:57:53,545 INFO L231 Difference]: Finished difference. Result has 380 places, 489 transitions, 9667 flow [2024-06-27 17:57:53,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=9551, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=434, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=9667, PETRI_PLACES=380, PETRI_TRANSITIONS=489} [2024-06-27 17:57:53,545 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 330 predicate places. [2024-06-27 17:57:53,545 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 489 transitions, 9667 flow [2024-06-27 17:57:53,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states 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 17:57:53,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:53,546 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:53,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-27 17:57:53,546 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:53,546 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:53,547 INFO L85 PathProgramCache]: Analyzing trace with hash -168821909, now seen corresponding path program 16 times [2024-06-27 17:57:53,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:53,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854546137] [2024-06-27 17:57:53,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:53,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:53,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:53,657 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 17:57:53,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:53,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854546137] [2024-06-27 17:57:53,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854546137] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:53,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:53,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:57:53,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221273193] [2024-06-27 17:57:53,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:53,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:57:53,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:53,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:57:53,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:57:53,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:57:53,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 489 transitions, 9667 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states 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 17:57:53,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:53,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:57:53,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:54,974 INFO L124 PetriNetUnfolderBase]: 4222/7164 cut-off events. [2024-06-27 17:57:54,974 INFO L125 PetriNetUnfolderBase]: For 524204/524326 co-relation queries the response was YES. [2024-06-27 17:57:55,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48681 conditions, 7164 events. 4222/7164 cut-off events. For 524204/524326 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 51183 event pairs, 1258 based on Foata normal form. 23/6895 useless extension candidates. Maximal degree in co-relation 48505. Up to 6255 conditions per place. [2024-06-27 17:57:55,068 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 435 selfloop transitions, 55 changer transitions 0/506 dead transitions. [2024-06-27 17:57:55,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 506 transitions, 10693 flow [2024-06-27 17:57:55,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:57:55,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:57:55,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 252 transitions. [2024-06-27 17:57:55,069 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5478260869565217 [2024-06-27 17:57:55,069 INFO L175 Difference]: Start difference. First operand has 380 places, 489 transitions, 9667 flow. Second operand 10 states and 252 transitions. [2024-06-27 17:57:55,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 506 transitions, 10693 flow [2024-06-27 17:57:58,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 506 transitions, 10421 flow, removed 13 selfloop flow, removed 14 redundant places. [2024-06-27 17:57:58,351 INFO L231 Difference]: Finished difference. Result has 376 places, 489 transitions, 9511 flow [2024-06-27 17:57:58,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=9395, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=434, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9511, PETRI_PLACES=376, PETRI_TRANSITIONS=489} [2024-06-27 17:57:58,352 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 326 predicate places. [2024-06-27 17:57:58,352 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 489 transitions, 9511 flow [2024-06-27 17:57:58,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states 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 17:57:58,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:58,352 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:58,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-27 17:57:58,352 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:58,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:58,353 INFO L85 PathProgramCache]: Analyzing trace with hash 738044455, now seen corresponding path program 17 times [2024-06-27 17:57:58,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:58,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027260394] [2024-06-27 17:57:58,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:58,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:58,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:58,459 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 17:57:58,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:58,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027260394] [2024-06-27 17:57:58,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027260394] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:58,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:58,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:57:58,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996981972] [2024-06-27 17:57:58,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:58,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:57:58,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:58,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:57:58,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:57:58,505 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:57:58,506 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 489 transitions, 9511 flow. Second operand has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 7 states have internal predecessors, (141), 0 states have call successors, (0), 0 states 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 17:57:58,506 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:58,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:57:58,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:00,006 INFO L124 PetriNetUnfolderBase]: 4219/7160 cut-off events. [2024-06-27 17:58:00,006 INFO L125 PetriNetUnfolderBase]: For 522248/522345 co-relation queries the response was YES. [2024-06-27 17:58:00,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48541 conditions, 7160 events. 4219/7160 cut-off events. For 522248/522345 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 51163 event pairs, 1244 based on Foata normal form. 22/6885 useless extension candidates. Maximal degree in co-relation 48366. Up to 6154 conditions per place. [2024-06-27 17:58:00,087 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 424 selfloop transitions, 82 changer transitions 0/522 dead transitions. [2024-06-27 17:58:00,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 522 transitions, 10829 flow [2024-06-27 17:58:00,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:58:00,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:58:00,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 231 transitions. [2024-06-27 17:58:00,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6277173913043478 [2024-06-27 17:58:00,088 INFO L175 Difference]: Start difference. First operand has 376 places, 489 transitions, 9511 flow. Second operand 8 states and 231 transitions. [2024-06-27 17:58:00,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 522 transitions, 10829 flow [2024-06-27 17:58:02,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 522 transitions, 10719 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-27 17:58:02,786 INFO L231 Difference]: Finished difference. Result has 375 places, 489 transitions, 9582 flow [2024-06-27 17:58:02,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=9401, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=407, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9582, PETRI_PLACES=375, PETRI_TRANSITIONS=489} [2024-06-27 17:58:02,787 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 325 predicate places. [2024-06-27 17:58:02,787 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 489 transitions, 9582 flow [2024-06-27 17:58:02,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 7 states have internal predecessors, (141), 0 states have call successors, (0), 0 states 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 17:58:02,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:02,787 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:02,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-27 17:58:02,787 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:58:02,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:02,787 INFO L85 PathProgramCache]: Analyzing trace with hash 738037015, now seen corresponding path program 18 times [2024-06-27 17:58:02,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:02,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962588138] [2024-06-27 17:58:02,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:02,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:02,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:02,877 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 17:58:02,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:02,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962588138] [2024-06-27 17:58:02,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962588138] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:02,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:02,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:58:02,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844868061] [2024-06-27 17:58:02,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:02,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:58:02,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:02,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:58:02,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:58:02,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:58:02,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 489 transitions, 9582 flow. Second operand has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 7 states have internal predecessors, (141), 0 states have call successors, (0), 0 states 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 17:58:02,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:02,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:58:02,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:04,193 INFO L124 PetriNetUnfolderBase]: 4216/7156 cut-off events. [2024-06-27 17:58:04,193 INFO L125 PetriNetUnfolderBase]: For 527913/528010 co-relation queries the response was YES. [2024-06-27 17:58:04,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48670 conditions, 7156 events. 4216/7156 cut-off events. For 527913/528010 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 51230 event pairs, 1244 based on Foata normal form. 22/6881 useless extension candidates. Maximal degree in co-relation 48494. Up to 6151 conditions per place. [2024-06-27 17:58:04,292 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 418 selfloop transitions, 79 changer transitions 0/513 dead transitions. [2024-06-27 17:58:04,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 513 transitions, 10658 flow [2024-06-27 17:58:04,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:58:04,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:58:04,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 178 transitions. [2024-06-27 17:58:04,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.644927536231884 [2024-06-27 17:58:04,293 INFO L175 Difference]: Start difference. First operand has 375 places, 489 transitions, 9582 flow. Second operand 6 states and 178 transitions. [2024-06-27 17:58:04,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 513 transitions, 10658 flow [2024-06-27 17:58:07,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 513 transitions, 10540 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-27 17:58:07,185 INFO L231 Difference]: Finished difference. Result has 376 places, 489 transitions, 9646 flow [2024-06-27 17:58:07,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=9464, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=410, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=9646, PETRI_PLACES=376, PETRI_TRANSITIONS=489} [2024-06-27 17:58:07,186 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 326 predicate places. [2024-06-27 17:58:07,186 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 489 transitions, 9646 flow [2024-06-27 17:58:07,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 7 states have internal predecessors, (141), 0 states have call successors, (0), 0 states 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 17:58:07,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:07,186 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:07,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-27 17:58:07,186 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:58:07,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:07,186 INFO L85 PathProgramCache]: Analyzing trace with hash 145288693, now seen corresponding path program 19 times [2024-06-27 17:58:07,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:07,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933519024] [2024-06-27 17:58:07,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:07,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:07,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:07,270 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 17:58:07,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:07,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933519024] [2024-06-27 17:58:07,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933519024] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:07,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:07,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:58:07,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774689783] [2024-06-27 17:58:07,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:07,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:58:07,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:07,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:58:07,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:58:07,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:58:07,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 489 transitions, 9646 flow. Second operand has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 7 states have internal predecessors, (141), 0 states have call successors, (0), 0 states 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 17:58:07,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:07,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:58:07,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:08,635 INFO L124 PetriNetUnfolderBase]: 4225/7168 cut-off events. [2024-06-27 17:58:08,635 INFO L125 PetriNetUnfolderBase]: For 532359/532446 co-relation queries the response was YES. [2024-06-27 17:58:08,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48809 conditions, 7168 events. 4225/7168 cut-off events. For 532359/532446 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 51225 event pairs, 1233 based on Foata normal form. 23/6891 useless extension candidates. Maximal degree in co-relation 48633. Up to 5964 conditions per place. [2024-06-27 17:58:08,725 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 328 selfloop transitions, 179 changer transitions 0/523 dead transitions. [2024-06-27 17:58:08,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 523 transitions, 11259 flow [2024-06-27 17:58:08,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:58:08,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:58:08,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 251 transitions. [2024-06-27 17:58:08,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.606280193236715 [2024-06-27 17:58:08,726 INFO L175 Difference]: Start difference. First operand has 376 places, 489 transitions, 9646 flow. Second operand 9 states and 251 transitions. [2024-06-27 17:58:08,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 523 transitions, 11259 flow [2024-06-27 17:58:11,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 523 transitions, 11123 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-27 17:58:11,847 INFO L231 Difference]: Finished difference. Result has 381 places, 495 transitions, 10008 flow [2024-06-27 17:58:11,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=9510, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10008, PETRI_PLACES=381, PETRI_TRANSITIONS=495} [2024-06-27 17:58:11,848 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 331 predicate places. [2024-06-27 17:58:11,848 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 495 transitions, 10008 flow [2024-06-27 17:58:11,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 7 states have internal predecessors, (141), 0 states have call successors, (0), 0 states 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 17:58:11,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:11,848 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:11,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-27 17:58:11,848 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:58:11,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:11,849 INFO L85 PathProgramCache]: Analyzing trace with hash -2037472279, now seen corresponding path program 20 times [2024-06-27 17:58:11,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:11,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838095553] [2024-06-27 17:58:11,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:11,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:11,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:11,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:58:11,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:11,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838095553] [2024-06-27 17:58:11,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838095553] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:11,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:11,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:58:11,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150985481] [2024-06-27 17:58:11,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:11,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:58:11,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:11,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:58:11,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:58:11,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:58:11,960 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 495 transitions, 10008 flow. Second operand has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 7 states have internal predecessors, (141), 0 states have call successors, (0), 0 states 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 17:58:11,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:11,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:58:11,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:13,224 INFO L124 PetriNetUnfolderBase]: 4222/7158 cut-off events. [2024-06-27 17:58:13,224 INFO L125 PetriNetUnfolderBase]: For 534422/534507 co-relation queries the response was YES. [2024-06-27 17:58:13,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49132 conditions, 7158 events. 4222/7158 cut-off events. For 534422/534507 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 51106 event pairs, 1252 based on Foata normal form. 18/6869 useless extension candidates. Maximal degree in co-relation 48955. Up to 5961 conditions per place. [2024-06-27 17:58:13,319 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 327 selfloop transitions, 177 changer transitions 0/520 dead transitions. [2024-06-27 17:58:13,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 520 transitions, 11500 flow [2024-06-27 17:58:13,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:58:13,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:58:13,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 202 transitions. [2024-06-27 17:58:13,320 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6273291925465838 [2024-06-27 17:58:13,320 INFO L175 Difference]: Start difference. First operand has 381 places, 495 transitions, 10008 flow. Second operand 7 states and 202 transitions. [2024-06-27 17:58:13,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 520 transitions, 11500 flow [2024-06-27 17:58:16,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 520 transitions, 11183 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-27 17:58:16,296 INFO L231 Difference]: Finished difference. Result has 381 places, 495 transitions, 10055 flow [2024-06-27 17:58:16,296 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=9695, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=495, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10055, PETRI_PLACES=381, PETRI_TRANSITIONS=495} [2024-06-27 17:58:16,297 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 331 predicate places. [2024-06-27 17:58:16,297 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 495 transitions, 10055 flow [2024-06-27 17:58:16,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 7 states have internal predecessors, (141), 0 states have call successors, (0), 0 states 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 17:58:16,297 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:16,297 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:16,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-27 17:58:16,298 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:58:16,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:16,298 INFO L85 PathProgramCache]: Analyzing trace with hash -864847399, now seen corresponding path program 21 times [2024-06-27 17:58:16,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:16,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612024014] [2024-06-27 17:58:16,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:16,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:16,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:16,391 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 17:58:16,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:16,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612024014] [2024-06-27 17:58:16,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612024014] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:16,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:16,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:58:16,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99679497] [2024-06-27 17:58:16,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:16,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:58:16,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:16,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:58:16,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:58:16,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:58:16,423 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 495 transitions, 10055 flow. Second operand has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 7 states have internal predecessors, (141), 0 states have call successors, (0), 0 states 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 17:58:16,423 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:16,423 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:58:16,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:17,684 INFO L124 PetriNetUnfolderBase]: 4216/7157 cut-off events. [2024-06-27 17:58:17,684 INFO L125 PetriNetUnfolderBase]: For 528292/528379 co-relation queries the response was YES. [2024-06-27 17:58:17,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48890 conditions, 7157 events. 4216/7157 cut-off events. For 528292/528379 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 51116 event pairs, 1232 based on Foata normal form. 19/6876 useless extension candidates. Maximal degree in co-relation 48713. Up to 5955 conditions per place. [2024-06-27 17:58:17,778 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 327 selfloop transitions, 183 changer transitions 0/526 dead transitions. [2024-06-27 17:58:17,778 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 526 transitions, 11575 flow [2024-06-27 17:58:17,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:58:17,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:58:17,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 232 transitions. [2024-06-27 17:58:17,779 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6304347826086957 [2024-06-27 17:58:17,779 INFO L175 Difference]: Start difference. First operand has 381 places, 495 transitions, 10055 flow. Second operand 8 states and 232 transitions. [2024-06-27 17:58:17,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 526 transitions, 11575 flow [2024-06-27 17:58:21,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 526 transitions, 11046 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-27 17:58:21,189 INFO L231 Difference]: Finished difference. Result has 382 places, 495 transitions, 9910 flow [2024-06-27 17:58:21,189 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=9526, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=495, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9910, PETRI_PLACES=382, PETRI_TRANSITIONS=495} [2024-06-27 17:58:21,190 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 332 predicate places. [2024-06-27 17:58:21,190 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 495 transitions, 9910 flow [2024-06-27 17:58:21,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 7 states have internal predecessors, (141), 0 states have call successors, (0), 0 states 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 17:58:21,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:21,190 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:21,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-27 17:58:21,191 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:58:21,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:21,191 INFO L85 PathProgramCache]: Analyzing trace with hash 874144531, now seen corresponding path program 1 times [2024-06-27 17:58:21,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:21,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773817599] [2024-06-27 17:58:21,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:21,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:21,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:21,280 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 17:58:21,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:21,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773817599] [2024-06-27 17:58:21,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773817599] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:21,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:21,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:58:21,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171624452] [2024-06-27 17:58:21,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:21,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:58:21,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:21,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:58:21,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:58:21,335 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:58:21,335 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 495 transitions, 9910 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states 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 17:58:21,335 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:21,335 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:58:21,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:22,609 INFO L124 PetriNetUnfolderBase]: 4262/7241 cut-off events. [2024-06-27 17:58:22,609 INFO L125 PetriNetUnfolderBase]: For 529155/529274 co-relation queries the response was YES. [2024-06-27 17:58:22,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48692 conditions, 7241 events. 4262/7241 cut-off events. For 529155/529274 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 51841 event pairs, 1251 based on Foata normal form. 28/6972 useless extension candidates. Maximal degree in co-relation 48514. Up to 6167 conditions per place. [2024-06-27 17:58:22,706 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 461 selfloop transitions, 47 changer transitions 0/524 dead transitions. [2024-06-27 17:58:22,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 524 transitions, 11029 flow [2024-06-27 17:58:22,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:58:22,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:58:22,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 259 transitions. [2024-06-27 17:58:22,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5630434782608695 [2024-06-27 17:58:22,707 INFO L175 Difference]: Start difference. First operand has 382 places, 495 transitions, 9910 flow. Second operand 10 states and 259 transitions. [2024-06-27 17:58:22,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 524 transitions, 11029 flow [2024-06-27 17:58:26,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 524 transitions, 10441 flow, removed 1 selfloop flow, removed 10 redundant places. [2024-06-27 17:58:26,588 INFO L231 Difference]: Finished difference. Result has 383 places, 496 transitions, 9439 flow [2024-06-27 17:58:26,588 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=9322, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=495, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=448, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9439, PETRI_PLACES=383, PETRI_TRANSITIONS=496} [2024-06-27 17:58:26,588 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 333 predicate places. [2024-06-27 17:58:26,588 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 496 transitions, 9439 flow [2024-06-27 17:58:26,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states 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 17:58:26,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:26,589 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:26,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-27 17:58:26,589 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:58:26,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:26,590 INFO L85 PathProgramCache]: Analyzing trace with hash -978107971, now seen corresponding path program 2 times [2024-06-27 17:58:26,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:26,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559354350] [2024-06-27 17:58:26,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:26,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:26,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:26,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:58:26,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:26,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559354350] [2024-06-27 17:58:26,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559354350] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:26,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:26,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:58:26,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630660312] [2024-06-27 17:58:26,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:26,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:58:26,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:26,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:58:26,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:58:26,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:58:26,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 496 transitions, 9439 flow. Second operand has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 7 states have internal predecessors, (141), 0 states have call successors, (0), 0 states 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 17:58:26,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:26,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:58:26,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:27,981 INFO L124 PetriNetUnfolderBase]: 4249/7231 cut-off events. [2024-06-27 17:58:27,981 INFO L125 PetriNetUnfolderBase]: For 490204/490314 co-relation queries the response was YES. [2024-06-27 17:58:28,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47574 conditions, 7231 events. 4249/7231 cut-off events. For 490204/490314 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 51867 event pairs, 1116 based on Foata normal form. 21/6955 useless extension candidates. Maximal degree in co-relation 47395. Up to 6080 conditions per place. [2024-06-27 17:58:28,077 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 478 selfloop transitions, 30 changer transitions 0/524 dead transitions. [2024-06-27 17:58:28,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 524 transitions, 10563 flow [2024-06-27 17:58:28,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:58:28,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:58:28,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 177 transitions. [2024-06-27 17:58:28,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6413043478260869 [2024-06-27 17:58:28,078 INFO L175 Difference]: Start difference. First operand has 383 places, 496 transitions, 9439 flow. Second operand 6 states and 177 transitions. [2024-06-27 17:58:28,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 524 transitions, 10563 flow [2024-06-27 17:58:30,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 524 transitions, 10442 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-27 17:58:30,875 INFO L231 Difference]: Finished difference. Result has 381 places, 496 transitions, 9383 flow [2024-06-27 17:58:30,876 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=9318, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=466, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=9383, PETRI_PLACES=381, PETRI_TRANSITIONS=496} [2024-06-27 17:58:30,876 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 331 predicate places. [2024-06-27 17:58:30,876 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 496 transitions, 9383 flow [2024-06-27 17:58:30,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 7 states have internal predecessors, (141), 0 states have call successors, (0), 0 states 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 17:58:30,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:30,876 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:30,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-27 17:58:30,876 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:58:30,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:30,877 INFO L85 PathProgramCache]: Analyzing trace with hash 1220597889, now seen corresponding path program 1 times [2024-06-27 17:58:30,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:30,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031398032] [2024-06-27 17:58:30,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:30,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:30,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:30,959 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 17:58:30,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:30,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031398032] [2024-06-27 17:58:30,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031398032] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:30,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:30,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:58:30,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63859583] [2024-06-27 17:58:30,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:30,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:58:30,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:30,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:58:30,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:58:30,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:58:30,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 496 transitions, 9383 flow. Second operand has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 7 states have internal predecessors, (141), 0 states have call successors, (0), 0 states 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 17:58:30,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:30,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:58:30,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:32,440 INFO L124 PetriNetUnfolderBase]: 4250/7224 cut-off events. [2024-06-27 17:58:32,440 INFO L125 PetriNetUnfolderBase]: For 466478/466578 co-relation queries the response was YES. [2024-06-27 17:58:32,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47260 conditions, 7224 events. 4250/7224 cut-off events. For 466478/466578 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 51771 event pairs, 1244 based on Foata normal form. 45/6966 useless extension candidates. Maximal degree in co-relation 47081. Up to 6229 conditions per place. [2024-06-27 17:58:32,525 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 459 selfloop transitions, 58 changer transitions 0/533 dead transitions. [2024-06-27 17:58:32,526 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 533 transitions, 10798 flow [2024-06-27 17:58:32,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:58:32,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:58:32,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 223 transitions. [2024-06-27 17:58:32,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6059782608695652 [2024-06-27 17:58:32,526 INFO L175 Difference]: Start difference. First operand has 381 places, 496 transitions, 9383 flow. Second operand 8 states and 223 transitions. [2024-06-27 17:58:32,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 533 transitions, 10798 flow [2024-06-27 17:58:35,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 533 transitions, 10689 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-27 17:58:35,152 INFO L231 Difference]: Finished difference. Result has 383 places, 499 transitions, 9459 flow [2024-06-27 17:58:35,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=9274, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=441, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9459, PETRI_PLACES=383, PETRI_TRANSITIONS=499} [2024-06-27 17:58:35,153 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 333 predicate places. [2024-06-27 17:58:35,153 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 499 transitions, 9459 flow [2024-06-27 17:58:35,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 7 states have internal predecessors, (141), 0 states have call successors, (0), 0 states 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 17:58:35,153 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:35,153 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 17:58:35,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-27 17:58:35,153 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:58:35,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:35,154 INFO L85 PathProgramCache]: Analyzing trace with hash -928634457, now seen corresponding path program 2 times [2024-06-27 17:58:35,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:35,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803427649] [2024-06-27 17:58:35,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:35,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:35,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:35,254 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 17:58:35,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:35,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803427649] [2024-06-27 17:58:35,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803427649] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:35,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:35,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:58:35,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378204433] [2024-06-27 17:58:35,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:35,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:58:35,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:35,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:58:35,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:58:35,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:58:35,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 499 transitions, 9459 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states 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 17:58:35,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:35,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:58:35,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:36,691 INFO L124 PetriNetUnfolderBase]: 4247/7230 cut-off events. [2024-06-27 17:58:36,691 INFO L125 PetriNetUnfolderBase]: For 467655/467755 co-relation queries the response was YES. [2024-06-27 17:58:36,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46730 conditions, 7230 events. 4247/7230 cut-off events. For 467655/467755 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 51811 event pairs, 1244 based on Foata normal form. 45/6972 useless extension candidates. Maximal degree in co-relation 46551. Up to 6226 conditions per place. [2024-06-27 17:58:36,781 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 460 selfloop transitions, 57 changer transitions 0/533 dead transitions. [2024-06-27 17:58:36,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 533 transitions, 10609 flow [2024-06-27 17:58:36,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:58:36,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:58:36,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 244 transitions. [2024-06-27 17:58:36,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5893719806763285 [2024-06-27 17:58:36,782 INFO L175 Difference]: Start difference. First operand has 383 places, 499 transitions, 9459 flow. Second operand 9 states and 244 transitions. [2024-06-27 17:58:36,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 533 transitions, 10609 flow [2024-06-27 17:58:39,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 533 transitions, 10484 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-27 17:58:39,381 INFO L231 Difference]: Finished difference. Result has 387 places, 499 transitions, 9454 flow [2024-06-27 17:58:39,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=9334, PETRI_DIFFERENCE_MINUEND_PLACES=378, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=442, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9454, PETRI_PLACES=387, PETRI_TRANSITIONS=499} [2024-06-27 17:58:39,382 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 337 predicate places. [2024-06-27 17:58:39,382 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 499 transitions, 9454 flow [2024-06-27 17:58:39,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states 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 17:58:39,382 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:39,382 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 17:58:39,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-27 17:58:39,382 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:58:39,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:39,382 INFO L85 PathProgramCache]: Analyzing trace with hash -928634271, now seen corresponding path program 1 times [2024-06-27 17:58:39,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:39,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785855335] [2024-06-27 17:58:39,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:39,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:39,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:39,471 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 17:58:39,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:39,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785855335] [2024-06-27 17:58:39,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785855335] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:39,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:39,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:58:39,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968935457] [2024-06-27 17:58:39,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:39,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:58:39,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:39,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:58:39,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:58:39,503 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:58:39,503 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 499 transitions, 9454 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states 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 17:58:39,503 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:39,504 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:58:39,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:40,783 INFO L124 PetriNetUnfolderBase]: 4265/7258 cut-off events. [2024-06-27 17:58:40,783 INFO L125 PetriNetUnfolderBase]: For 474372/474480 co-relation queries the response was YES. [2024-06-27 17:58:40,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47061 conditions, 7258 events. 4265/7258 cut-off events. For 474372/474480 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 52083 event pairs, 1243 based on Foata normal form. 35/6988 useless extension candidates. Maximal degree in co-relation 46881. Up to 6176 conditions per place. [2024-06-27 17:58:40,881 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 423 selfloop transitions, 102 changer transitions 0/541 dead transitions. [2024-06-27 17:58:40,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 541 transitions, 11170 flow [2024-06-27 17:58:40,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:58:40,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:58:40,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 251 transitions. [2024-06-27 17:58:40,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.606280193236715 [2024-06-27 17:58:40,882 INFO L175 Difference]: Start difference. First operand has 387 places, 499 transitions, 9454 flow. Second operand 9 states and 251 transitions. [2024-06-27 17:58:40,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 541 transitions, 11170 flow [2024-06-27 17:58:43,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 541 transitions, 11021 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-27 17:58:43,762 INFO L231 Difference]: Finished difference. Result has 389 places, 505 transitions, 9700 flow [2024-06-27 17:58:43,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=9305, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=399, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9700, PETRI_PLACES=389, PETRI_TRANSITIONS=505} [2024-06-27 17:58:43,763 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 339 predicate places. [2024-06-27 17:58:43,763 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 505 transitions, 9700 flow [2024-06-27 17:58:43,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states 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 17:58:43,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:43,763 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 17:58:43,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-27 17:58:43,764 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:58:43,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:43,764 INFO L85 PathProgramCache]: Analyzing trace with hash 778766739, now seen corresponding path program 1 times [2024-06-27 17:58:43,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:43,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861648233] [2024-06-27 17:58:43,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:43,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:43,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:43,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:58:43,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:43,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861648233] [2024-06-27 17:58:43,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861648233] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:43,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:43,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:58:43,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118386123] [2024-06-27 17:58:43,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:43,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:58:43,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:43,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:58:43,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:58:43,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:58:43,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 505 transitions, 9700 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states 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 17:58:43,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:43,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:58:43,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:45,306 INFO L124 PetriNetUnfolderBase]: 4480/7688 cut-off events. [2024-06-27 17:58:45,307 INFO L125 PetriNetUnfolderBase]: For 514484/514613 co-relation queries the response was YES. [2024-06-27 17:58:45,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49231 conditions, 7688 events. 4480/7688 cut-off events. For 514484/514613 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 55900 event pairs, 1157 based on Foata normal form. 34/7409 useless extension candidates. Maximal degree in co-relation 49049. Up to 6168 conditions per place. [2024-06-27 17:58:45,406 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 488 selfloop transitions, 48 changer transitions 0/552 dead transitions. [2024-06-27 17:58:45,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 552 transitions, 11198 flow [2024-06-27 17:58:45,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:58:45,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:58:45,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 232 transitions. [2024-06-27 17:58:45,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6304347826086957 [2024-06-27 17:58:45,407 INFO L175 Difference]: Start difference. First operand has 389 places, 505 transitions, 9700 flow. Second operand 8 states and 232 transitions. [2024-06-27 17:58:45,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 552 transitions, 11198 flow [2024-06-27 17:58:47,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 552 transitions, 10616 flow, removed 71 selfloop flow, removed 8 redundant places. [2024-06-27 17:58:47,982 INFO L231 Difference]: Finished difference. Result has 390 places, 509 transitions, 9294 flow [2024-06-27 17:58:47,982 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=9118, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=505, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=458, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9294, PETRI_PLACES=390, PETRI_TRANSITIONS=509} [2024-06-27 17:58:47,982 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 340 predicate places. [2024-06-27 17:58:47,982 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 509 transitions, 9294 flow [2024-06-27 17:58:47,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states 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 17:58:47,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:47,982 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 17:58:47,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-27 17:58:47,983 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:58:47,983 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:47,983 INFO L85 PathProgramCache]: Analyzing trace with hash -1009882977, now seen corresponding path program 2 times [2024-06-27 17:58:47,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:47,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420525174] [2024-06-27 17:58:47,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:47,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:47,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:48,096 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 17:58:48,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:48,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420525174] [2024-06-27 17:58:48,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420525174] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:48,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:48,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:58:48,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710412967] [2024-06-27 17:58:48,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:48,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:58:48,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:48,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:58:48,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:58:48,138 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:58:48,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 509 transitions, 9294 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states 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 17:58:48,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:48,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:58:48,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:49,510 INFO L124 PetriNetUnfolderBase]: 4641/7930 cut-off events. [2024-06-27 17:58:49,510 INFO L125 PetriNetUnfolderBase]: For 521902/522034 co-relation queries the response was YES. [2024-06-27 17:58:49,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50858 conditions, 7930 events. 4641/7930 cut-off events. For 521902/522034 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 58004 event pairs, 1366 based on Foata normal form. 34/7638 useless extension candidates. Maximal degree in co-relation 50678. Up to 6716 conditions per place. [2024-06-27 17:58:49,616 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 489 selfloop transitions, 50 changer transitions 0/555 dead transitions. [2024-06-27 17:58:49,617 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 555 transitions, 10710 flow [2024-06-27 17:58:49,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:58:49,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:58:49,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 226 transitions. [2024-06-27 17:58:49,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6141304347826086 [2024-06-27 17:58:49,617 INFO L175 Difference]: Start difference. First operand has 390 places, 509 transitions, 9294 flow. Second operand 8 states and 226 transitions. [2024-06-27 17:58:49,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 555 transitions, 10710 flow [2024-06-27 17:58:52,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 555 transitions, 10576 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-27 17:58:52,645 INFO L231 Difference]: Finished difference. Result has 394 places, 518 transitions, 9455 flow [2024-06-27 17:58:52,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=9173, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=509, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=464, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9455, PETRI_PLACES=394, PETRI_TRANSITIONS=518} [2024-06-27 17:58:52,645 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 344 predicate places. [2024-06-27 17:58:52,646 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 518 transitions, 9455 flow [2024-06-27 17:58:52,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states 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 17:58:52,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:52,646 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 17:58:52,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-27 17:58:52,646 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:58:52,646 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:52,646 INFO L85 PathProgramCache]: Analyzing trace with hash -809849595, now seen corresponding path program 3 times [2024-06-27 17:58:52,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:52,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253545481] [2024-06-27 17:58:52,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:52,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:52,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:52,754 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 17:58:52,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:52,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253545481] [2024-06-27 17:58:52,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253545481] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:52,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:52,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:58:52,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219954581] [2024-06-27 17:58:52,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:52,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:58:52,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:52,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:58:52,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:58:52,804 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:58:52,804 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 518 transitions, 9455 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states 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 17:58:52,804 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:52,804 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:58:52,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:54,740 INFO L124 PetriNetUnfolderBase]: 4678/7958 cut-off events. [2024-06-27 17:58:54,740 INFO L125 PetriNetUnfolderBase]: For 521979/522139 co-relation queries the response was YES. [2024-06-27 17:58:54,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51331 conditions, 7958 events. 4678/7958 cut-off events. For 521979/522139 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 58145 event pairs, 1416 based on Foata normal form. 102/7726 useless extension candidates. Maximal degree in co-relation 51150. Up to 6468 conditions per place. [2024-06-27 17:58:54,828 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 363 selfloop transitions, 180 changer transitions 0/559 dead transitions. [2024-06-27 17:58:54,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 559 transitions, 11347 flow [2024-06-27 17:58:54,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:58:54,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:58:54,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 227 transitions. [2024-06-27 17:58:54,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6168478260869565 [2024-06-27 17:58:54,829 INFO L175 Difference]: Start difference. First operand has 394 places, 518 transitions, 9455 flow. Second operand 8 states and 227 transitions. [2024-06-27 17:58:54,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 559 transitions, 11347 flow [2024-06-27 17:58:57,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 559 transitions, 11243 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-27 17:58:57,929 INFO L231 Difference]: Finished difference. Result has 398 places, 530 transitions, 10009 flow [2024-06-27 17:58:57,929 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=9351, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10009, PETRI_PLACES=398, PETRI_TRANSITIONS=530} [2024-06-27 17:58:57,929 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 348 predicate places. [2024-06-27 17:58:57,929 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 530 transitions, 10009 flow [2024-06-27 17:58:57,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states 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 17:58:57,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:57,930 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 17:58:57,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-27 17:58:57,930 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:58:57,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:57,930 INFO L85 PathProgramCache]: Analyzing trace with hash -809729439, now seen corresponding path program 2 times [2024-06-27 17:58:57,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:57,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669994036] [2024-06-27 17:58:57,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:57,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:57,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:58,015 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 17:58:58,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:58,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669994036] [2024-06-27 17:58:58,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669994036] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:58,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:58,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:58:58,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071346496] [2024-06-27 17:58:58,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:58,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:58:58,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:58,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:58:58,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:58:58,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:58:58,075 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 530 transitions, 10009 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states 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 17:58:58,075 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:58,075 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:58:58,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:59,873 INFO L124 PetriNetUnfolderBase]: 4696/7984 cut-off events. [2024-06-27 17:58:59,873 INFO L125 PetriNetUnfolderBase]: For 540478/540642 co-relation queries the response was YES. [2024-06-27 17:59:00,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52064 conditions, 7984 events. 4696/7984 cut-off events. For 540478/540642 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 58178 event pairs, 1421 based on Foata normal form. 61/7708 useless extension candidates. Maximal degree in co-relation 51882. Up to 6171 conditions per place. [2024-06-27 17:59:00,080 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 270 selfloop transitions, 278 changer transitions 0/564 dead transitions. [2024-06-27 17:59:00,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 564 transitions, 12055 flow [2024-06-27 17:59:00,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:59:00,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:59:00,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 228 transitions. [2024-06-27 17:59:00,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6195652173913043 [2024-06-27 17:59:00,081 INFO L175 Difference]: Start difference. First operand has 398 places, 530 transitions, 10009 flow. Second operand 8 states and 228 transitions. [2024-06-27 17:59:00,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 564 transitions, 12055 flow [2024-06-27 17:59:03,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 564 transitions, 11581 flow, removed 60 selfloop flow, removed 5 redundant places. [2024-06-27 17:59:03,677 INFO L231 Difference]: Finished difference. Result has 402 places, 536 transitions, 10303 flow [2024-06-27 17:59:03,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=9535, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=530, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=272, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10303, PETRI_PLACES=402, PETRI_TRANSITIONS=536} [2024-06-27 17:59:03,678 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 352 predicate places. [2024-06-27 17:59:03,678 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 536 transitions, 10303 flow [2024-06-27 17:59:03,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states 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 17:59:03,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:59:03,678 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 17:59:03,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-27 17:59:03,678 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:59:03,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:59:03,678 INFO L85 PathProgramCache]: Analyzing trace with hash -600428475, now seen corresponding path program 4 times [2024-06-27 17:59:03,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:59:03,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94563725] [2024-06-27 17:59:03,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:59:03,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:59:03,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:59:03,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:59:03,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:59:03,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94563725] [2024-06-27 17:59:03,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94563725] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:59:03,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:59:03,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:59:03,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24488095] [2024-06-27 17:59:03,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:59:03,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:59:03,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:59:03,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:59:03,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:59:03,793 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:59:03,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 536 transitions, 10303 flow. Second operand has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 7 states have internal predecessors, (141), 0 states have call successors, (0), 0 states 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 17:59:03,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:59:03,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:59:03,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:59:05,577 INFO L124 PetriNetUnfolderBase]: 4746/8065 cut-off events. [2024-06-27 17:59:05,578 INFO L125 PetriNetUnfolderBase]: For 580254/580442 co-relation queries the response was YES. [2024-06-27 17:59:05,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53715 conditions, 8065 events. 4746/8065 cut-off events. For 580254/580442 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 58800 event pairs, 1408 based on Foata normal form. 131/7853 useless extension candidates. Maximal degree in co-relation 53531. Up to 6548 conditions per place. [2024-06-27 17:59:05,793 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 360 selfloop transitions, 202 changer transitions 0/578 dead transitions. [2024-06-27 17:59:05,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 578 transitions, 12543 flow [2024-06-27 17:59:05,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:59:05,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:59:05,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 202 transitions. [2024-06-27 17:59:05,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6273291925465838 [2024-06-27 17:59:05,794 INFO L175 Difference]: Start difference. First operand has 402 places, 536 transitions, 10303 flow. Second operand 7 states and 202 transitions. [2024-06-27 17:59:05,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 578 transitions, 12543 flow [2024-06-27 17:59:09,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 578 transitions, 11875 flow, removed 50 selfloop flow, removed 6 redundant places. [2024-06-27 17:59:09,704 INFO L231 Difference]: Finished difference. Result has 403 places, 551 transitions, 10431 flow [2024-06-27 17:59:09,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=9655, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=187, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10431, PETRI_PLACES=403, PETRI_TRANSITIONS=551} [2024-06-27 17:59:09,705 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 353 predicate places. [2024-06-27 17:59:09,705 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 551 transitions, 10431 flow [2024-06-27 17:59:09,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 7 states have internal predecessors, (141), 0 states have call successors, (0), 0 states 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 17:59:09,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:59:09,705 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 17:59:09,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-27 17:59:09,705 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:59:09,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:59:09,706 INFO L85 PathProgramCache]: Analyzing trace with hash -809729625, now seen corresponding path program 5 times [2024-06-27 17:59:09,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:59:09,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293442412] [2024-06-27 17:59:09,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:59:09,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:59:09,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:59:09,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:59:09,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:59:09,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293442412] [2024-06-27 17:59:09,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293442412] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:59:09,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:59:09,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:59:09,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917159443] [2024-06-27 17:59:09,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:59:09,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:59:09,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:59:09,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:59:09,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:59:09,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:59:09,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 551 transitions, 10431 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states 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 17:59:09,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:59:09,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:59:09,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:59:11,687 INFO L124 PetriNetUnfolderBase]: 4750/8066 cut-off events. [2024-06-27 17:59:11,687 INFO L125 PetriNetUnfolderBase]: For 583624/583815 co-relation queries the response was YES. [2024-06-27 17:59:11,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53380 conditions, 8066 events. 4750/8066 cut-off events. For 583624/583815 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 58773 event pairs, 1418 based on Foata normal form. 124/7846 useless extension candidates. Maximal degree in co-relation 53197. Up to 6550 conditions per place. [2024-06-27 17:59:11,777 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 366 selfloop transitions, 197 changer transitions 0/579 dead transitions. [2024-06-27 17:59:11,777 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 579 transitions, 11905 flow [2024-06-27 17:59:11,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:59:11,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:59:11,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 222 transitions. [2024-06-27 17:59:11,778 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6032608695652174 [2024-06-27 17:59:11,778 INFO L175 Difference]: Start difference. First operand has 403 places, 551 transitions, 10431 flow. Second operand 8 states and 222 transitions. [2024-06-27 17:59:11,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 579 transitions, 11905 flow [2024-06-27 17:59:15,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 579 transitions, 11605 flow, removed 61 selfloop flow, removed 2 redundant places. [2024-06-27 17:59:15,045 INFO L231 Difference]: Finished difference. Result has 409 places, 554 transitions, 10583 flow [2024-06-27 17:59:15,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=10134, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=551, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=194, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10583, PETRI_PLACES=409, PETRI_TRANSITIONS=554} [2024-06-27 17:59:15,046 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 359 predicate places. [2024-06-27 17:59:15,046 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 554 transitions, 10583 flow [2024-06-27 17:59:15,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states 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 17:59:15,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:59:15,046 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 17:59:15,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-27 17:59:15,047 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:59:15,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:59:15,047 INFO L85 PathProgramCache]: Analyzing trace with hash -600072285, now seen corresponding path program 6 times [2024-06-27 17:59:15,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:59:15,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204716439] [2024-06-27 17:59:15,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:59:15,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:59:15,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:59:15,130 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 17:59:15,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:59:15,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204716439] [2024-06-27 17:59:15,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204716439] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:59:15,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:59:15,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:59:15,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310190072] [2024-06-27 17:59:15,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:59:15,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:59:15,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:59:15,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:59:15,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:59:15,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:59:15,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 554 transitions, 10583 flow. Second operand has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 7 states have internal predecessors, (141), 0 states have call successors, (0), 0 states 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 17:59:15,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:59:15,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:59:15,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:59:17,086 INFO L124 PetriNetUnfolderBase]: 4770/8102 cut-off events. [2024-06-27 17:59:17,086 INFO L125 PetriNetUnfolderBase]: For 606013/606233 co-relation queries the response was YES. [2024-06-27 17:59:17,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53902 conditions, 8102 events. 4770/8102 cut-off events. For 606013/606233 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 59158 event pairs, 1408 based on Foata normal form. 161/7916 useless extension candidates. Maximal degree in co-relation 53718. Up to 6575 conditions per place. [2024-06-27 17:59:17,171 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 351 selfloop transitions, 216 changer transitions 0/583 dead transitions. [2024-06-27 17:59:17,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 583 transitions, 12577 flow [2024-06-27 17:59:17,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:59:17,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:59:17,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 199 transitions. [2024-06-27 17:59:17,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6180124223602484 [2024-06-27 17:59:17,172 INFO L175 Difference]: Start difference. First operand has 409 places, 554 transitions, 10583 flow. Second operand 7 states and 199 transitions. [2024-06-27 17:59:17,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 583 transitions, 12577 flow [2024-06-27 17:59:20,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 583 transitions, 12321 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-27 17:59:20,181 INFO L231 Difference]: Finished difference. Result has 411 places, 560 transitions, 10897 flow [2024-06-27 17:59:20,181 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=10333, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=554, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=210, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10897, PETRI_PLACES=411, PETRI_TRANSITIONS=560} [2024-06-27 17:59:20,181 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 361 predicate places. [2024-06-27 17:59:20,182 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 560 transitions, 10897 flow [2024-06-27 17:59:20,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 7 states have internal predecessors, (141), 0 states have call successors, (0), 0 states 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 17:59:20,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:59:20,182 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 17:59:20,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-27 17:59:20,182 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:59:20,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:59:20,183 INFO L85 PathProgramCache]: Analyzing trace with hash -484602369, now seen corresponding path program 3 times [2024-06-27 17:59:20,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:59:20,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684485840] [2024-06-27 17:59:20,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:59:20,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:59:20,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:59:20,261 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 17:59:20,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:59:20,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684485840] [2024-06-27 17:59:20,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684485840] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:59:20,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:59:20,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:59:20,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215006917] [2024-06-27 17:59:20,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:59:20,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:59:20,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:59:20,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:59:20,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:59:20,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:59:20,306 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 560 transitions, 10897 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states 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 17:59:20,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:59:20,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:59:20,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:59:22,135 INFO L124 PetriNetUnfolderBase]: 4784/8113 cut-off events. [2024-06-27 17:59:22,135 INFO L125 PetriNetUnfolderBase]: For 626159/626362 co-relation queries the response was YES. [2024-06-27 17:59:22,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54272 conditions, 8113 events. 4784/8113 cut-off events. For 626159/626362 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 59158 event pairs, 1415 based on Foata normal form. 88/7850 useless extension candidates. Maximal degree in co-relation 54087. Up to 6243 conditions per place. [2024-06-27 17:59:22,238 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 278 selfloop transitions, 297 changer transitions 0/591 dead transitions. [2024-06-27 17:59:22,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 591 transitions, 12975 flow [2024-06-27 17:59:22,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:59:22,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:59:22,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 225 transitions. [2024-06-27 17:59:22,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6114130434782609 [2024-06-27 17:59:22,240 INFO L175 Difference]: Start difference. First operand has 411 places, 560 transitions, 10897 flow. Second operand 8 states and 225 transitions. [2024-06-27 17:59:22,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 591 transitions, 12975 flow [2024-06-27 17:59:26,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 591 transitions, 12489 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-27 17:59:26,203 INFO L231 Difference]: Finished difference. Result has 415 places, 566 transitions, 11149 flow [2024-06-27 17:59:26,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=10411, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=560, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=291, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11149, PETRI_PLACES=415, PETRI_TRANSITIONS=566} [2024-06-27 17:59:26,204 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 365 predicate places. [2024-06-27 17:59:26,204 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 566 transitions, 11149 flow [2024-06-27 17:59:26,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states 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 17:59:26,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:59:26,204 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:59:26,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-27 17:59:26,205 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:59:26,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:59:26,205 INFO L85 PathProgramCache]: Analyzing trace with hash 123183115, now seen corresponding path program 7 times [2024-06-27 17:59:26,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:59:26,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068753962] [2024-06-27 17:59:26,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:59:26,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:59:26,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:59:26,299 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 17:59:26,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:59:26,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068753962] [2024-06-27 17:59:26,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068753962] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:59:26,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:59:26,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:59:26,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764432757] [2024-06-27 17:59:26,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:59:26,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:59:26,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:59:26,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:59:26,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:59:26,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:59:26,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 566 transitions, 11149 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states 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 17:59:26,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:59:26,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:59:26,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:59:28,178 INFO L124 PetriNetUnfolderBase]: 4791/8126 cut-off events. [2024-06-27 17:59:28,178 INFO L125 PetriNetUnfolderBase]: For 633742/633945 co-relation queries the response was YES. [2024-06-27 17:59:28,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54709 conditions, 8126 events. 4791/8126 cut-off events. For 633742/633945 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 59200 event pairs, 1411 based on Foata normal form. 128/7901 useless extension candidates. Maximal degree in co-relation 54524. Up to 6599 conditions per place. [2024-06-27 17:59:28,272 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 370 selfloop transitions, 206 changer transitions 0/592 dead transitions. [2024-06-27 17:59:28,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 592 transitions, 12873 flow [2024-06-27 17:59:28,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:59:28,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:59:28,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 221 transitions. [2024-06-27 17:59:28,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6005434782608695 [2024-06-27 17:59:28,273 INFO L175 Difference]: Start difference. First operand has 415 places, 566 transitions, 11149 flow. Second operand 8 states and 221 transitions. [2024-06-27 17:59:28,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 592 transitions, 12873 flow [2024-06-27 17:59:32,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 592 transitions, 12307 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-27 17:59:32,418 INFO L231 Difference]: Finished difference. Result has 419 places, 569 transitions, 11057 flow [2024-06-27 17:59:32,419 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=10587, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=566, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=203, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11057, PETRI_PLACES=419, PETRI_TRANSITIONS=569} [2024-06-27 17:59:32,419 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 369 predicate places. [2024-06-27 17:59:32,419 INFO L495 AbstractCegarLoop]: Abstraction has has 419 places, 569 transitions, 11057 flow [2024-06-27 17:59:32,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states 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 17:59:32,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:59:32,419 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 17:59:32,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-27 17:59:32,420 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:59:32,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:59:32,420 INFO L85 PathProgramCache]: Analyzing trace with hash -800475195, now seen corresponding path program 8 times [2024-06-27 17:59:32,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:59:32,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618814513] [2024-06-27 17:59:32,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:59:32,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:59:32,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:59:32,516 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 17:59:32,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:59:32,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618814513] [2024-06-27 17:59:32,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618814513] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:59:32,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:59:32,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:59:32,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256272271] [2024-06-27 17:59:32,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:59:32,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:59:32,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:59:32,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:59:32,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:59:32,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:59:32,559 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 419 places, 569 transitions, 11057 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states 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 17:59:32,559 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:59:32,559 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:59:32,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:59:34,465 INFO L124 PetriNetUnfolderBase]: 4788/8122 cut-off events. [2024-06-27 17:59:34,465 INFO L125 PetriNetUnfolderBase]: For 635007/635190 co-relation queries the response was YES. [2024-06-27 17:59:34,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54330 conditions, 8122 events. 4788/8122 cut-off events. For 635007/635190 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 59148 event pairs, 1411 based on Foata normal form. 112/7881 useless extension candidates. Maximal degree in co-relation 54144. Up to 6596 conditions per place. [2024-06-27 17:59:34,562 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 369 selfloop transitions, 206 changer transitions 0/591 dead transitions. [2024-06-27 17:59:34,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 426 places, 591 transitions, 12499 flow [2024-06-27 17:59:34,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:59:34,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:59:34,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 219 transitions. [2024-06-27 17:59:34,563 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.595108695652174 [2024-06-27 17:59:34,563 INFO L175 Difference]: Start difference. First operand has 419 places, 569 transitions, 11057 flow. Second operand 8 states and 219 transitions. [2024-06-27 17:59:34,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 426 places, 591 transitions, 12499 flow [2024-06-27 17:59:38,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 591 transitions, 12228 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-27 17:59:38,299 INFO L231 Difference]: Finished difference. Result has 423 places, 569 transitions, 11204 flow [2024-06-27 17:59:38,299 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=10786, PETRI_DIFFERENCE_MINUEND_PLACES=415, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=569, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=206, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11204, PETRI_PLACES=423, PETRI_TRANSITIONS=569} [2024-06-27 17:59:38,300 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 373 predicate places. [2024-06-27 17:59:38,300 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 569 transitions, 11204 flow [2024-06-27 17:59:38,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states 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 17:59:38,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:59:38,300 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 17:59:38,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-27 17:59:38,300 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:59:38,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:59:38,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1752700097, now seen corresponding path program 4 times [2024-06-27 17:59:38,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:59:38,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669723142] [2024-06-27 17:59:38,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:59:38,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:59:38,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:59:38,378 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 17:59:38,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:59:38,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669723142] [2024-06-27 17:59:38,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669723142] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:59:38,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:59:38,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:59:38,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879794759] [2024-06-27 17:59:38,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:59:38,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:59:38,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:59:38,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:59:38,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:59:38,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:59:38,409 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 569 transitions, 11204 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states 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 17:59:38,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:59:38,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:59:38,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:59:40,224 INFO L124 PetriNetUnfolderBase]: 4785/8119 cut-off events. [2024-06-27 17:59:40,224 INFO L125 PetriNetUnfolderBase]: For 643768/643951 co-relation queries the response was YES. [2024-06-27 17:59:40,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54318 conditions, 8119 events. 4785/8119 cut-off events. For 643768/643951 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 59192 event pairs, 1415 based on Foata normal form. 57/7823 useless extension candidates. Maximal degree in co-relation 54131. Up to 6245 conditions per place. [2024-06-27 17:59:40,320 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 280 selfloop transitions, 297 changer transitions 0/593 dead transitions. [2024-06-27 17:59:40,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 593 transitions, 12936 flow [2024-06-27 17:59:40,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:59:40,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:59:40,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 225 transitions. [2024-06-27 17:59:40,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6114130434782609 [2024-06-27 17:59:40,321 INFO L175 Difference]: Start difference. First operand has 423 places, 569 transitions, 11204 flow. Second operand 8 states and 225 transitions. [2024-06-27 17:59:40,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 593 transitions, 12936 flow [2024-06-27 17:59:44,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 593 transitions, 12309 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-06-27 17:59:45,006 INFO L231 Difference]: Finished difference. Result has 423 places, 569 transitions, 11177 flow [2024-06-27 17:59:45,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=10577, PETRI_DIFFERENCE_MINUEND_PLACES=415, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=569, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=297, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11177, PETRI_PLACES=423, PETRI_TRANSITIONS=569} [2024-06-27 17:59:45,006 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 373 predicate places. [2024-06-27 17:59:45,006 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 569 transitions, 11177 flow [2024-06-27 17:59:45,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states 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 17:59:45,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:59:45,007 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 17:59:45,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-27 17:59:45,007 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:59:45,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:59:45,007 INFO L85 PathProgramCache]: Analyzing trace with hash -2060289439, now seen corresponding path program 5 times [2024-06-27 17:59:45,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:59:45,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529895502] [2024-06-27 17:59:45,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:59:45,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:59:45,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:59:45,104 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 17:59:45,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:59:45,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529895502] [2024-06-27 17:59:45,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529895502] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:59:45,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:59:45,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:59:45,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452722755] [2024-06-27 17:59:45,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:59:45,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:59:45,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:59:45,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:59:45,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:59:45,161 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:59:45,161 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 569 transitions, 11177 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states 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 17:59:45,161 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:59:45,161 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:59:45,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:59:47,117 INFO L124 PetriNetUnfolderBase]: 4809/8154 cut-off events. [2024-06-27 17:59:47,117 INFO L125 PetriNetUnfolderBase]: For 655124/655276 co-relation queries the response was YES. [2024-06-27 17:59:47,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55186 conditions, 8154 events. 4809/8154 cut-off events. For 655124/655276 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 59485 event pairs, 1392 based on Foata normal form. 28/7820 useless extension candidates. Maximal degree in co-relation 54998. Up to 7010 conditions per place. [2024-06-27 17:59:47,211 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 497 selfloop transitions, 87 changer transitions 0/600 dead transitions. [2024-06-27 17:59:47,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 600 transitions, 13096 flow [2024-06-27 17:59:47,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:59:47,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:59:47,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 241 transitions. [2024-06-27 17:59:47,211 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5821256038647343 [2024-06-27 17:59:47,211 INFO L175 Difference]: Start difference. First operand has 423 places, 569 transitions, 11177 flow. Second operand 9 states and 241 transitions. [2024-06-27 17:59:47,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 600 transitions, 13096 flow [2024-06-27 17:59:51,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 600 transitions, 12542 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-27 17:59:51,847 INFO L231 Difference]: Finished difference. Result has 427 places, 578 transitions, 11062 flow [2024-06-27 17:59:51,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=10635, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=569, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=485, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11062, PETRI_PLACES=427, PETRI_TRANSITIONS=578} [2024-06-27 17:59:51,848 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 377 predicate places. [2024-06-27 17:59:51,848 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 578 transitions, 11062 flow [2024-06-27 17:59:51,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states 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 17:59:51,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:59:51,848 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 17:59:51,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-27 17:59:51,848 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:59:51,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:59:51,849 INFO L85 PathProgramCache]: Analyzing trace with hash -1587061149, now seen corresponding path program 9 times [2024-06-27 17:59:51,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:59:51,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644498616] [2024-06-27 17:59:51,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:59:51,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:59:51,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:59:51,947 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 17:59:51,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:59:51,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644498616] [2024-06-27 17:59:51,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644498616] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:59:51,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:59:51,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:59:51,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110068661] [2024-06-27 17:59:51,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:59:51,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:59:51,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:59:51,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:59:51,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:59:52,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:59:52,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 578 transitions, 11062 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states 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 17:59:52,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:59:52,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:59:52,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:59:54,070 INFO L124 PetriNetUnfolderBase]: 4806/8151 cut-off events. [2024-06-27 17:59:54,071 INFO L125 PetriNetUnfolderBase]: For 654758/654910 co-relation queries the response was YES. [2024-06-27 17:59:54,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54450 conditions, 8151 events. 4806/8151 cut-off events. For 654758/654910 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 59448 event pairs, 1391 based on Foata normal form. 32/7821 useless extension candidates. Maximal degree in co-relation 54260. Up to 7091 conditions per place. [2024-06-27 17:59:54,172 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 536 selfloop transitions, 46 changer transitions 0/598 dead transitions. [2024-06-27 17:59:54,173 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 598 transitions, 12516 flow [2024-06-27 17:59:54,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:59:54,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:59:54,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 234 transitions. [2024-06-27 17:59:54,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5652173913043478 [2024-06-27 17:59:54,173 INFO L175 Difference]: Start difference. First operand has 427 places, 578 transitions, 11062 flow. Second operand 9 states and 234 transitions. [2024-06-27 17:59:54,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 598 transitions, 12516 flow [2024-06-27 17:59:58,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 598 transitions, 12383 flow, removed 31 selfloop flow, removed 4 redundant places. [2024-06-27 17:59:58,453 INFO L231 Difference]: Finished difference. Result has 432 places, 578 transitions, 11027 flow [2024-06-27 17:59:58,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=10929, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=578, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=532, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11027, PETRI_PLACES=432, PETRI_TRANSITIONS=578} [2024-06-27 17:59:58,453 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 382 predicate places. [2024-06-27 17:59:58,453 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 578 transitions, 11027 flow [2024-06-27 17:59:58,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states 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 17:59:58,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:59:58,453 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 17:59:58,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-27 17:59:58,454 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:59:58,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:59:58,454 INFO L85 PathProgramCache]: Analyzing trace with hash -2060284045, now seen corresponding path program 10 times [2024-06-27 17:59:58,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:59:58,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417256829] [2024-06-27 17:59:58,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:59:58,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:59:58,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:59:58,534 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 17:59:58,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:59:58,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417256829] [2024-06-27 17:59:58,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417256829] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:59:58,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:59:58,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:59:58,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363212441] [2024-06-27 17:59:58,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:59:58,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:59:58,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:59:58,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:59:58,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:59:58,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:59:58,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 578 transitions, 11027 flow. Second operand has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 7 states have internal predecessors, (141), 0 states have call successors, (0), 0 states 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 17:59:58,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:59:58,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:59:58,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:00:00,382 INFO L124 PetriNetUnfolderBase]: 4803/8146 cut-off events. [2024-06-27 18:00:00,382 INFO L125 PetriNetUnfolderBase]: For 656086/656238 co-relation queries the response was YES. [2024-06-27 18:00:00,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54423 conditions, 8146 events. 4803/8146 cut-off events. For 656086/656238 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 59349 event pairs, 1391 based on Foata normal form. 32/7816 useless extension candidates. Maximal degree in co-relation 54231. Up to 7088 conditions per place. [2024-06-27 18:00:00,484 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 534 selfloop transitions, 46 changer transitions 0/596 dead transitions. [2024-06-27 18:00:00,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 596 transitions, 12241 flow [2024-06-27 18:00:00,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:00:00,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:00:00,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 211 transitions. [2024-06-27 18:00:00,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5733695652173914 [2024-06-27 18:00:00,485 INFO L175 Difference]: Start difference. First operand has 432 places, 578 transitions, 11027 flow. Second operand 8 states and 211 transitions. [2024-06-27 18:00:00,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 596 transitions, 12241 flow [2024-06-27 18:00:04,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 596 transitions, 12126 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-27 18:00:04,988 INFO L231 Difference]: Finished difference. Result has 432 places, 578 transitions, 11010 flow [2024-06-27 18:00:04,988 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=10912, PETRI_DIFFERENCE_MINUEND_PLACES=424, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=578, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=532, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11010, PETRI_PLACES=432, PETRI_TRANSITIONS=578} [2024-06-27 18:00:04,988 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 382 predicate places. [2024-06-27 18:00:04,988 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 578 transitions, 11010 flow [2024-06-27 18:00:04,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 7 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:00:04,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:00:04,989 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 18:00:04,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-27 18:00:04,989 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:00:04,989 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:00:04,990 INFO L85 PathProgramCache]: Analyzing trace with hash -263844463, now seen corresponding path program 6 times [2024-06-27 18:00:04,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:00:04,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964169341] [2024-06-27 18:00:04,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:00:04,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:00:04,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:00:05,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:00:05,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:00:05,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964169341] [2024-06-27 18:00:05,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964169341] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:00:05,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:00:05,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:00:05,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717083388] [2024-06-27 18:00:05,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:00:05,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:00:05,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:00:05,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:00:05,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:00:05,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 18:00:05,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 578 transitions, 11010 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:00:05,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:00:05,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 18:00:05,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:00:07,155 INFO L124 PetriNetUnfolderBase]: 4810/8155 cut-off events. [2024-06-27 18:00:07,155 INFO L125 PetriNetUnfolderBase]: For 664975/665127 co-relation queries the response was YES. [2024-06-27 18:00:07,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54588 conditions, 8155 events. 4810/8155 cut-off events. For 664975/665127 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 59437 event pairs, 1392 based on Foata normal form. 28/7819 useless extension candidates. Maximal degree in co-relation 54395. Up to 7012 conditions per place. [2024-06-27 18:00:07,274 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 497 selfloop transitions, 90 changer transitions 0/603 dead transitions. [2024-06-27 18:00:07,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 603 transitions, 12809 flow [2024-06-27 18:00:07,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:00:07,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:00:07,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 241 transitions. [2024-06-27 18:00:07,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5821256038647343 [2024-06-27 18:00:07,275 INFO L175 Difference]: Start difference. First operand has 432 places, 578 transitions, 11010 flow. Second operand 9 states and 241 transitions. [2024-06-27 18:00:07,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 603 transitions, 12809 flow [2024-06-27 18:00:12,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 603 transitions, 12711 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 18:00:12,145 INFO L231 Difference]: Finished difference. Result has 434 places, 581 transitions, 11178 flow [2024-06-27 18:00:12,145 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=10912, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=578, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=491, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11178, PETRI_PLACES=434, PETRI_TRANSITIONS=581} [2024-06-27 18:00:12,145 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 384 predicate places. [2024-06-27 18:00:12,146 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 581 transitions, 11178 flow [2024-06-27 18:00:12,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:00:12,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:00:12,146 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 18:00:12,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-27 18:00:12,146 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:00:12,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:00:12,146 INFO L85 PathProgramCache]: Analyzing trace with hash -35943313, now seen corresponding path program 7 times [2024-06-27 18:00:12,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:00:12,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640308955] [2024-06-27 18:00:12,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:00:12,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:00:12,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:00:12,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:00:12,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:00:12,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640308955] [2024-06-27 18:00:12,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640308955] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:00:12,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:00:12,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:00:12,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802869479] [2024-06-27 18:00:12,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:00:12,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:00:12,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:00:12,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:00:12,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:00:12,292 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 18:00:12,293 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 581 transitions, 11178 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:00:12,293 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:00:12,293 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 18:00:12,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:00:14,497 INFO L124 PetriNetUnfolderBase]: 4807/8153 cut-off events. [2024-06-27 18:00:14,497 INFO L125 PetriNetUnfolderBase]: For 665590/665742 co-relation queries the response was YES. [2024-06-27 18:00:14,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54639 conditions, 8153 events. 4807/8153 cut-off events. For 665590/665742 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 59431 event pairs, 1392 based on Foata normal form. 32/7821 useless extension candidates. Maximal degree in co-relation 54445. Up to 7010 conditions per place. [2024-06-27 18:00:14,607 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 498 selfloop transitions, 89 changer transitions 0/603 dead transitions. [2024-06-27 18:00:14,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 603 transitions, 12663 flow [2024-06-27 18:00:14,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:00:14,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:00:14,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 262 transitions. [2024-06-27 18:00:14,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5695652173913044 [2024-06-27 18:00:14,608 INFO L175 Difference]: Start difference. First operand has 434 places, 581 transitions, 11178 flow. Second operand 10 states and 262 transitions. [2024-06-27 18:00:14,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 603 transitions, 12663 flow [2024-06-27 18:00:19,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 603 transitions, 12417 flow, removed 46 selfloop flow, removed 6 redundant places. [2024-06-27 18:00:19,257 INFO L231 Difference]: Finished difference. Result has 438 places, 581 transitions, 11116 flow [2024-06-27 18:00:19,257 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=10932, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=581, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=492, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11116, PETRI_PLACES=438, PETRI_TRANSITIONS=581} [2024-06-27 18:00:19,258 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 388 predicate places. [2024-06-27 18:00:19,258 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 581 transitions, 11116 flow [2024-06-27 18:00:19,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:00:19,258 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:00:19,258 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 18:00:19,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-27 18:00:19,258 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:00:19,259 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:00:19,259 INFO L85 PathProgramCache]: Analyzing trace with hash -1715734147, now seen corresponding path program 3 times [2024-06-27 18:00:19,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:00:19,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368426593] [2024-06-27 18:00:19,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:00:19,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:00:19,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:00:19,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:00:19,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:00:19,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368426593] [2024-06-27 18:00:19,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368426593] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:00:19,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:00:19,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:00:19,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322393425] [2024-06-27 18:00:19,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:00:19,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:00:19,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:00:19,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:00:19,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:00:19,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 18:00:19,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 581 transitions, 11116 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:00:19,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:00:19,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 18:00:19,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:00:21,614 INFO L124 PetriNetUnfolderBase]: 4881/8282 cut-off events. [2024-06-27 18:00:21,615 INFO L125 PetriNetUnfolderBase]: For 713374/713523 co-relation queries the response was YES. [2024-06-27 18:00:21,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55342 conditions, 8282 events. 4881/8282 cut-off events. For 713374/713523 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 60539 event pairs, 1394 based on Foata normal form. 33/7949 useless extension candidates. Maximal degree in co-relation 55147. Up to 7045 conditions per place. [2024-06-27 18:00:21,746 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 551 selfloop transitions, 48 changer transitions 0/615 dead transitions. [2024-06-27 18:00:21,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 615 transitions, 12509 flow [2024-06-27 18:00:21,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:00:21,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:00:21,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 221 transitions. [2024-06-27 18:00:21,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6005434782608695 [2024-06-27 18:00:21,748 INFO L175 Difference]: Start difference. First operand has 438 places, 581 transitions, 11116 flow. Second operand 8 states and 221 transitions. [2024-06-27 18:00:21,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 615 transitions, 12509 flow [2024-06-27 18:00:26,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 615 transitions, 12317 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-27 18:00:26,637 INFO L231 Difference]: Finished difference. Result has 439 places, 585 transitions, 11113 flow [2024-06-27 18:00:26,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=10926, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=581, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=533, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11113, PETRI_PLACES=439, PETRI_TRANSITIONS=585} [2024-06-27 18:00:26,638 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 389 predicate places. [2024-06-27 18:00:26,638 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 585 transitions, 11113 flow [2024-06-27 18:00:26,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:00:26,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:00:26,638 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 18:00:26,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-27 18:00:26,638 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:00:26,638 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:00:26,638 INFO L85 PathProgramCache]: Analyzing trace with hash -1870633087, now seen corresponding path program 1 times [2024-06-27 18:00:26,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:00:26,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507677063] [2024-06-27 18:00:26,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:00:26,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:00:26,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:00:26,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:00:26,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:00:26,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507677063] [2024-06-27 18:00:26,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507677063] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:00:26,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:00:26,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:00:26,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285311002] [2024-06-27 18:00:26,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:00:26,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:00:26,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:00:26,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:00:26,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:00:26,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 18:00:26,766 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 585 transitions, 11113 flow. Second operand has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 7 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:00:26,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:00:26,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 18:00:26,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:00:28,894 INFO L124 PetriNetUnfolderBase]: 4934/8410 cut-off events. [2024-06-27 18:00:28,895 INFO L125 PetriNetUnfolderBase]: For 716487/716670 co-relation queries the response was YES. [2024-06-27 18:00:28,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56322 conditions, 8410 events. 4934/8410 cut-off events. For 716487/716670 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 61796 event pairs, 1428 based on Foata normal form. 70/8108 useless extension candidates. Maximal degree in co-relation 56124. Up to 7075 conditions per place. [2024-06-27 18:00:29,000 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 508 selfloop transitions, 97 changer transitions 0/621 dead transitions. [2024-06-27 18:00:29,000 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 621 transitions, 12719 flow [2024-06-27 18:00:29,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:00:29,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:00:29,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 202 transitions. [2024-06-27 18:00:29,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6273291925465838 [2024-06-27 18:00:29,001 INFO L175 Difference]: Start difference. First operand has 439 places, 585 transitions, 11113 flow. Second operand 7 states and 202 transitions. [2024-06-27 18:00:29,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 621 transitions, 12719 flow [2024-06-27 18:00:34,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 621 transitions, 12624 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-27 18:00:34,456 INFO L231 Difference]: Finished difference. Result has 443 places, 589 transitions, 11269 flow [2024-06-27 18:00:34,456 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=11018, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=585, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=490, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=11269, PETRI_PLACES=443, PETRI_TRANSITIONS=589} [2024-06-27 18:00:34,457 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 393 predicate places. [2024-06-27 18:00:34,457 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 589 transitions, 11269 flow [2024-06-27 18:00:34,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 7 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:00:34,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:00:34,457 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 18:00:34,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-27 18:00:34,458 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:00:34,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:00:34,458 INFO L85 PathProgramCache]: Analyzing trace with hash 1251967169, now seen corresponding path program 2 times [2024-06-27 18:00:34,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:00:34,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668643609] [2024-06-27 18:00:34,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:00:34,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:00:34,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:00:34,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:00:34,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:00:34,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668643609] [2024-06-27 18:00:34,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668643609] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:00:34,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:00:34,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:00:34,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190757895] [2024-06-27 18:00:34,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:00:34,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:00:34,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:00:34,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:00:34,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:00:34,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 18:00:34,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 589 transitions, 11269 flow. Second operand has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 7 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:00:34,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:00:34,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 18:00:34,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:00:36,746 INFO L124 PetriNetUnfolderBase]: 4955/8411 cut-off events. [2024-06-27 18:00:36,746 INFO L125 PetriNetUnfolderBase]: For 727525/727708 co-relation queries the response was YES. [2024-06-27 18:00:36,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56686 conditions, 8411 events. 4955/8411 cut-off events. For 727525/727708 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 61701 event pairs, 1456 based on Foata normal form. 70/8107 useless extension candidates. Maximal degree in co-relation 56487. Up to 7185 conditions per place. [2024-06-27 18:00:36,873 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 504 selfloop transitions, 96 changer transitions 0/616 dead transitions. [2024-06-27 18:00:36,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 449 places, 616 transitions, 12581 flow [2024-06-27 18:00:36,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:00:36,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:00:36,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 195 transitions. [2024-06-27 18:00:36,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6055900621118012 [2024-06-27 18:00:36,875 INFO L175 Difference]: Start difference. First operand has 443 places, 589 transitions, 11269 flow. Second operand 7 states and 195 transitions. [2024-06-27 18:00:36,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 449 places, 616 transitions, 12581 flow [2024-06-27 18:00:42,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 616 transitions, 12427 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-27 18:00:42,382 INFO L231 Difference]: Finished difference. Result has 447 places, 591 transitions, 11344 flow [2024-06-27 18:00:42,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=11127, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=493, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=11344, PETRI_PLACES=447, PETRI_TRANSITIONS=591} [2024-06-27 18:00:42,383 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 397 predicate places. [2024-06-27 18:00:42,383 INFO L495 AbstractCegarLoop]: Abstraction has has 447 places, 591 transitions, 11344 flow [2024-06-27 18:00:42,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 7 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:00:42,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:00:42,383 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 18:00:42,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-27 18:00:42,383 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:00:42,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:00:42,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1311285847, now seen corresponding path program 3 times [2024-06-27 18:00:42,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:00:42,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713851337] [2024-06-27 18:00:42,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:00:42,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:00:42,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:00:42,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:00:42,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:00:42,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713851337] [2024-06-27 18:00:42,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713851337] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:00:42,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:00:42,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:00:42,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930245806] [2024-06-27 18:00:42,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:00:42,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:00:42,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:00:42,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:00:42,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:00:42,514 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 18:00:42,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 447 places, 591 transitions, 11344 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:00:42,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:00:42,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 18:00:42,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:00:44,596 INFO L124 PetriNetUnfolderBase]: 4973/8444 cut-off events. [2024-06-27 18:00:44,597 INFO L125 PetriNetUnfolderBase]: For 735630/735802 co-relation queries the response was YES.