./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe009_pso.oepc_pso.opt_tso.oepc_tso.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/protection/safe009_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f 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/safe009_pso.oepc_pso.opt_tso.oepc_tso.opt.i ./goblint.2024-06-19_11-23-25.files/protection/safe009_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 --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-eb4cb34-m [2024-06-21 15:43:48,777 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 15:43:48,855 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 15:43:48,859 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 15:43:48,860 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 15:43:48,882 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 15:43:48,884 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 15:43:48,884 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 15:43:48,885 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 15:43:48,888 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 15:43:48,888 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 15:43:48,888 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 15:43:48,889 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 15:43:48,890 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 15:43:48,890 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 15:43:48,891 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 15:43:48,891 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 15:43:48,891 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 15:43:48,891 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 15:43:48,892 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 15:43:48,892 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 15:43:48,892 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 15:43:48,892 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 15:43:48,893 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 15:43:48,893 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 15:43:48,893 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 15:43:48,893 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 15:43:48,894 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 15:43:48,894 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 15:43:48,894 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 15:43:48,895 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 15:43:48,896 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 15:43:48,896 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 15:43:48,896 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 15:43:48,896 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 15:43:48,896 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 15:43:48,897 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 15:43:48,897 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 15:43:48,897 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 15:43:48,897 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 15:43:48,897 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 15:43:48,898 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 15:43:48,898 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 15:43:48,898 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 15:43:49,096 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 15:43:49,129 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 15:43:49,131 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 15:43:49,132 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 15:43:49,135 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 15:43:49,136 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/safe009_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml [2024-06-21 15:43:49,216 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 15:43:49,216 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 15:43:49,217 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe009_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-21 15:43:50,409 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 15:43:50,619 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 15:43:50,620 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe009_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-21 15:43:50,632 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/036ffb636/1a6280e94a71493c96837df35ccff1c5/FLAG1beb49f0e [2024-06-21 15:43:50,642 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/036ffb636/1a6280e94a71493c96837df35ccff1c5 [2024-06-21 15:43:50,643 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 15:43:50,644 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 15:43:50,644 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 15:43:50,645 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 15:43:50,648 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 15:43:50,649 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 03:43:49" (1/2) ... [2024-06-21 15:43:50,650 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@437498f5 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 03:43:50, skipping insertion in model container [2024-06-21 15:43:50,650 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 03:43:49" (1/2) ... [2024-06-21 15:43:50,651 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@19a0c18a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 03:43:50, skipping insertion in model container [2024-06-21 15:43:50,651 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 03:43:50" (2/2) ... [2024-06-21 15:43:50,652 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@437498f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 03:43:50, skipping insertion in model container [2024-06-21 15:43:50,652 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 03:43:50" (2/2) ... [2024-06-21 15:43:50,652 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 15:43:50,707 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 15:43:50,709 INFO L97 edCorrectnessWitness]: Location invariant before [L778-L778] ((((! multithreaded || ((y == 0 || y == 1) || y == 2)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (x == 0 || x == 1)) [2024-06-21 15:43:50,709 INFO L97 edCorrectnessWitness]: Location invariant before [L779-L779] ((((! multithreaded || ((y == 0 || y == 1) || y == 2)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (x == 0 || x == 1)) [2024-06-21 15:43:50,709 INFO L97 edCorrectnessWitness]: Location invariant before [L776-L776] ((((! multithreaded || ((y == 0 || y == 1) || y == 2)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (x == 0 || x == 1)) [2024-06-21 15:43:50,709 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 15:43:50,710 INFO L106 edCorrectnessWitness]: ghost_update [L774-L774] multithreaded = 1; [2024-06-21 15:43:50,748 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 15:43:51,018 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 15:43:51,028 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 15:43:51,112 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 15:43:51,145 INFO L206 MainTranslator]: Completed translation [2024-06-21 15:43:51,146 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 03:43:51 WrapperNode [2024-06-21 15:43:51,146 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 15:43:51,147 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 15:43:51,147 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 15:43:51,148 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 15:43:51,153 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 03:43:51" (1/1) ... [2024-06-21 15:43:51,171 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 03:43:51" (1/1) ... [2024-06-21 15:43:51,188 INFO L138 Inliner]: procedures = 175, calls = 40, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 65 [2024-06-21 15:43:51,188 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 15:43:51,188 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 15:43:51,189 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 15:43:51,189 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 15:43:51,197 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 03:43:51" (1/1) ... [2024-06-21 15:43:51,198 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 03:43:51" (1/1) ... [2024-06-21 15:43:51,200 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 03:43:51" (1/1) ... [2024-06-21 15:43:51,210 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]. [2024-06-21 15:43:51,211 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 03:43:51" (1/1) ... [2024-06-21 15:43:51,211 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 03:43:51" (1/1) ... [2024-06-21 15:43:51,216 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 03:43:51" (1/1) ... [2024-06-21 15:43:51,218 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 03:43:51" (1/1) ... [2024-06-21 15:43:51,219 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 03:43:51" (1/1) ... [2024-06-21 15:43:51,220 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 03:43:51" (1/1) ... [2024-06-21 15:43:51,222 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 15:43:51,223 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 15:43:51,223 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 15:43:51,223 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 15:43:51,224 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 03:43:51" (1/1) ... [2024-06-21 15:43:51,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 15:43:51,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 15:43:51,257 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) [2024-06-21 15:43:51,273 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 [2024-06-21 15:43:51,298 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 15:43:51,298 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 15:43:51,298 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 15:43:51,298 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 15:43:51,298 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 15:43:51,298 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 15:43:51,298 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 15:43:51,299 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 15:43:51,299 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 15:43:51,299 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 15:43:51,299 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 15:43:51,299 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 15:43:51,300 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 15:43:51,419 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 15:43:51,421 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 15:43:51,590 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 15:43:51,590 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 15:43:51,664 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 15:43:51,665 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 15:43:51,665 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 03:43:51 BoogieIcfgContainer [2024-06-21 15:43:51,665 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 15:43:51,666 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 15:43:51,667 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 15:43:51,669 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 15:43:51,669 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 03:43:49" (1/4) ... [2024-06-21 15:43:51,670 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@288b5bd4 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 03:43:51, skipping insertion in model container [2024-06-21 15:43:51,670 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 03:43:50" (2/4) ... [2024-06-21 15:43:51,670 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@288b5bd4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 03:43:51, skipping insertion in model container [2024-06-21 15:43:51,670 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 03:43:51" (3/4) ... [2024-06-21 15:43:51,671 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@288b5bd4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 03:43:51, skipping insertion in model container [2024-06-21 15:43:51,671 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 03:43:51" (4/4) ... [2024-06-21 15:43:51,672 INFO L112 eAbstractionObserver]: Analyzing ICFG safe009_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-21 15:43:51,685 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 15:43:51,685 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-21 15:43:51,686 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 15:43:51,726 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 15:43:51,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 49 places, 39 transitions, 90 flow [2024-06-21 15:43:51,787 INFO L124 PetriNetUnfolderBase]: 0/36 cut-off events. [2024-06-21 15:43:51,788 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 15:43:51,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46 conditions, 36 events. 0/36 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 59 event pairs, 0 based on Foata normal form. 0/33 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 15:43:51,789 INFO L82 GeneralOperation]: Start removeDead. Operand has 49 places, 39 transitions, 90 flow [2024-06-21 15:43:51,793 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 40 places, 30 transitions, 69 flow [2024-06-21 15:43:51,806 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 15:43:51,811 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;@69a66f9c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 15:43:51,812 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-21 15:43:51,815 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 15:43:51,815 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 15:43:51,815 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 15:43:51,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:43:51,816 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 15:43:51,817 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:43:51,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:43:51,821 INFO L85 PathProgramCache]: Analyzing trace with hash 215575840, now seen corresponding path program 1 times [2024-06-21 15:43:51,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:43:51,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114002360] [2024-06-21 15:43:51,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:43:51,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:43:51,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:43:52,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:43:52,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:43:52,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114002360] [2024-06-21 15:43:52,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114002360] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:43:52,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:43:52,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 15:43:52,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988839408] [2024-06-21 15:43:52,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:43:52,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 15:43:52,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:43:52,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 15:43:52,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 15:43:52,169 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 39 [2024-06-21 15:43:52,172 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 30 transitions, 69 flow. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:52,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:43:52,172 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 39 [2024-06-21 15:43:52,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:43:52,318 INFO L124 PetriNetUnfolderBase]: 471/807 cut-off events. [2024-06-21 15:43:52,319 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-06-21 15:43:52,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1595 conditions, 807 events. 471/807 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 3895 event pairs, 288 based on Foata normal form. 1/787 useless extension candidates. Maximal degree in co-relation 1583. Up to 733 conditions per place. [2024-06-21 15:43:52,330 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 27 selfloop transitions, 4 changer transitions 0/40 dead transitions. [2024-06-21 15:43:52,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 40 transitions, 157 flow [2024-06-21 15:43:52,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 15:43:52,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 15:43:52,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 82 transitions. [2024-06-21 15:43:52,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7008547008547008 [2024-06-21 15:43:52,341 INFO L175 Difference]: Start difference. First operand has 40 places, 30 transitions, 69 flow. Second operand 3 states and 82 transitions. [2024-06-21 15:43:52,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 40 transitions, 157 flow [2024-06-21 15:43:52,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 40 transitions, 152 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 15:43:52,346 INFO L231 Difference]: Finished difference. Result has 40 places, 33 transitions, 96 flow [2024-06-21 15:43:52,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=96, PETRI_PLACES=40, PETRI_TRANSITIONS=33} [2024-06-21 15:43:52,350 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 0 predicate places. [2024-06-21 15:43:52,350 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 33 transitions, 96 flow [2024-06-21 15:43:52,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:52,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:43:52,351 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:43:52,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 15:43:52,351 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:43:52,351 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:43:52,352 INFO L85 PathProgramCache]: Analyzing trace with hash 1277271903, now seen corresponding path program 1 times [2024-06-21 15:43:52,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:43:52,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371826880] [2024-06-21 15:43:52,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:43:52,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:43:52,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:43:52,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:43:52,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:43:52,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371826880] [2024-06-21 15:43:52,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371826880] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:43:52,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:43:52,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 15:43:52,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54184982] [2024-06-21 15:43:52,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:43:52,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 15:43:52,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:43:52,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 15:43:52,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 15:43:52,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 15:43:52,506 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 33 transitions, 96 flow. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:52,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:43:52,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 15:43:52,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:43:52,708 INFO L124 PetriNetUnfolderBase]: 754/1254 cut-off events. [2024-06-21 15:43:52,728 INFO L125 PetriNetUnfolderBase]: For 194/196 co-relation queries the response was YES. [2024-06-21 15:43:52,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2856 conditions, 1254 events. 754/1254 cut-off events. For 194/196 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 6109 event pairs, 318 based on Foata normal form. 5/1258 useless extension candidates. Maximal degree in co-relation 2844. Up to 1124 conditions per place. [2024-06-21 15:43:52,734 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 40 selfloop transitions, 7 changer transitions 0/54 dead transitions. [2024-06-21 15:43:52,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 54 transitions, 248 flow [2024-06-21 15:43:52,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 15:43:52,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 15:43:52,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 103 transitions. [2024-06-21 15:43:52,736 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6602564102564102 [2024-06-21 15:43:52,736 INFO L175 Difference]: Start difference. First operand has 40 places, 33 transitions, 96 flow. Second operand 4 states and 103 transitions. [2024-06-21 15:43:52,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 54 transitions, 248 flow [2024-06-21 15:43:52,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 54 transitions, 242 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 15:43:52,738 INFO L231 Difference]: Finished difference. Result has 44 places, 39 transitions, 148 flow [2024-06-21 15:43:52,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=148, PETRI_PLACES=44, PETRI_TRANSITIONS=39} [2024-06-21 15:43:52,738 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 4 predicate places. [2024-06-21 15:43:52,739 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 39 transitions, 148 flow [2024-06-21 15:43:52,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:52,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:43:52,739 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:43:52,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 15:43:52,739 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:43:52,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:43:52,750 INFO L85 PathProgramCache]: Analyzing trace with hash -902335586, now seen corresponding path program 1 times [2024-06-21 15:43:52,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:43:52,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168183643] [2024-06-21 15:43:52,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:43:52,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:43:52,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:43:52,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:43:52,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:43:52,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168183643] [2024-06-21 15:43:52,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168183643] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:43:52,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:43:52,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:43:52,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187041764] [2024-06-21 15:43:52,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:43:52,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:43:52,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:43:52,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:43:52,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:43:52,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 15:43:52,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 39 transitions, 148 flow. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:52,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:43:52,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 15:43:52,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:43:52,989 INFO L124 PetriNetUnfolderBase]: 745/1239 cut-off events. [2024-06-21 15:43:52,989 INFO L125 PetriNetUnfolderBase]: For 580/588 co-relation queries the response was YES. [2024-06-21 15:43:52,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3170 conditions, 1239 events. 745/1239 cut-off events. For 580/588 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 6017 event pairs, 218 based on Foata normal form. 14/1252 useless extension candidates. Maximal degree in co-relation 3155. Up to 1079 conditions per place. [2024-06-21 15:43:52,996 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 44 selfloop transitions, 9 changer transitions 0/60 dead transitions. [2024-06-21 15:43:52,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 60 transitions, 308 flow [2024-06-21 15:43:52,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:43:52,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:43:52,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 123 transitions. [2024-06-21 15:43:52,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6307692307692307 [2024-06-21 15:43:52,998 INFO L175 Difference]: Start difference. First operand has 44 places, 39 transitions, 148 flow. Second operand 5 states and 123 transitions. [2024-06-21 15:43:52,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 60 transitions, 308 flow [2024-06-21 15:43:52,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 60 transitions, 306 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-21 15:43:53,000 INFO L231 Difference]: Finished difference. Result has 48 places, 40 transitions, 179 flow [2024-06-21 15:43:53,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=179, PETRI_PLACES=48, PETRI_TRANSITIONS=40} [2024-06-21 15:43:53,001 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 8 predicate places. [2024-06-21 15:43:53,001 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 40 transitions, 179 flow [2024-06-21 15:43:53,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:53,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:43:53,001 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:43:53,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 15:43:53,002 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:43:53,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:43:53,002 INFO L85 PathProgramCache]: Analyzing trace with hash -1632488695, now seen corresponding path program 1 times [2024-06-21 15:43:53,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:43:53,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682088461] [2024-06-21 15:43:53,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:43:53,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:43:53,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:43:53,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:43:53,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:43:53,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682088461] [2024-06-21 15:43:53,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682088461] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:43:53,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:43:53,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 15:43:53,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896841473] [2024-06-21 15:43:53,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:43:53,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 15:43:53,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:43:53,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 15:43:53,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 15:43:53,161 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 15:43:53,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 40 transitions, 179 flow. Second operand has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:53,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:43:53,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 15:43:53,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:43:53,280 INFO L124 PetriNetUnfolderBase]: 747/1228 cut-off events. [2024-06-21 15:43:53,281 INFO L125 PetriNetUnfolderBase]: For 1101/1103 co-relation queries the response was YES. [2024-06-21 15:43:53,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3429 conditions, 1228 events. 747/1228 cut-off events. For 1101/1103 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 5857 event pairs, 254 based on Foata normal form. 5/1229 useless extension candidates. Maximal degree in co-relation 3411. Up to 1105 conditions per place. [2024-06-21 15:43:53,287 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 48 selfloop transitions, 10 changer transitions 0/65 dead transitions. [2024-06-21 15:43:53,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 65 transitions, 387 flow [2024-06-21 15:43:53,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 15:43:53,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 15:43:53,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 102 transitions. [2024-06-21 15:43:53,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6538461538461539 [2024-06-21 15:43:53,292 INFO L175 Difference]: Start difference. First operand has 48 places, 40 transitions, 179 flow. Second operand 4 states and 102 transitions. [2024-06-21 15:43:53,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 65 transitions, 387 flow [2024-06-21 15:43:53,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 65 transitions, 362 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-21 15:43:53,297 INFO L231 Difference]: Finished difference. Result has 50 places, 49 transitions, 235 flow [2024-06-21 15:43:53,298 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=235, PETRI_PLACES=50, PETRI_TRANSITIONS=49} [2024-06-21 15:43:53,299 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 10 predicate places. [2024-06-21 15:43:53,299 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 49 transitions, 235 flow [2024-06-21 15:43:53,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:53,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:43:53,299 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:43:53,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 15:43:53,300 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:43:53,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:43:53,300 INFO L85 PathProgramCache]: Analyzing trace with hash 2101841614, now seen corresponding path program 1 times [2024-06-21 15:43:53,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:43:53,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071469151] [2024-06-21 15:43:53,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:43:53,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:43:53,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:43:53,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:43:53,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:43:53,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071469151] [2024-06-21 15:43:53,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071469151] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:43:53,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:43:53,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:43:53,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182511214] [2024-06-21 15:43:53,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:43:53,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:43:53,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:43:53,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:43:53,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:43:53,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 15:43:53,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 49 transitions, 235 flow. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:53,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:43:53,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 15:43:53,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:43:53,581 INFO L124 PetriNetUnfolderBase]: 758/1285 cut-off events. [2024-06-21 15:43:53,581 INFO L125 PetriNetUnfolderBase]: For 1862/1874 co-relation queries the response was YES. [2024-06-21 15:43:53,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4008 conditions, 1285 events. 758/1285 cut-off events. For 1862/1874 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 6408 event pairs, 280 based on Foata normal form. 14/1298 useless extension candidates. Maximal degree in co-relation 3988. Up to 1085 conditions per place. [2024-06-21 15:43:53,589 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 53 selfloop transitions, 16 changer transitions 0/76 dead transitions. [2024-06-21 15:43:53,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 76 transitions, 484 flow [2024-06-21 15:43:53,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:43:53,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:43:53,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 126 transitions. [2024-06-21 15:43:53,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6461538461538462 [2024-06-21 15:43:53,591 INFO L175 Difference]: Start difference. First operand has 50 places, 49 transitions, 235 flow. Second operand 5 states and 126 transitions. [2024-06-21 15:43:53,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 76 transitions, 484 flow [2024-06-21 15:43:53,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 76 transitions, 478 flow, removed 3 selfloop flow, removed 0 redundant places. [2024-06-21 15:43:53,597 INFO L231 Difference]: Finished difference. Result has 55 places, 55 transitions, 315 flow [2024-06-21 15:43:53,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=229, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=315, PETRI_PLACES=55, PETRI_TRANSITIONS=55} [2024-06-21 15:43:53,599 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 15 predicate places. [2024-06-21 15:43:53,600 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 55 transitions, 315 flow [2024-06-21 15:43:53,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:53,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:43:53,602 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:43:53,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 15:43:53,602 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:43:53,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:43:53,603 INFO L85 PathProgramCache]: Analyzing trace with hash 1897587144, now seen corresponding path program 1 times [2024-06-21 15:43:53,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:43:53,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282248167] [2024-06-21 15:43:53,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:43:53,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:43:53,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:43:53,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:43:53,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:43:53,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282248167] [2024-06-21 15:43:53,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282248167] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:43:53,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:43:53,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:43:53,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671019015] [2024-06-21 15:43:53,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:43:53,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:43:53,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:43:53,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:43:53,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:43:53,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 15:43:53,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 55 transitions, 315 flow. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:53,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:43:53,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 15:43:53,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:43:53,850 INFO L124 PetriNetUnfolderBase]: 800/1331 cut-off events. [2024-06-21 15:43:53,850 INFO L125 PetriNetUnfolderBase]: For 2808/2820 co-relation queries the response was YES. [2024-06-21 15:43:53,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4558 conditions, 1331 events. 800/1331 cut-off events. For 2808/2820 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 6563 event pairs, 253 based on Foata normal form. 15/1345 useless extension candidates. Maximal degree in co-relation 4535. Up to 1123 conditions per place. [2024-06-21 15:43:53,858 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 48 selfloop transitions, 23 changer transitions 0/78 dead transitions. [2024-06-21 15:43:53,859 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 78 transitions, 554 flow [2024-06-21 15:43:53,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:43:53,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:43:53,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 123 transitions. [2024-06-21 15:43:53,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6307692307692307 [2024-06-21 15:43:53,860 INFO L175 Difference]: Start difference. First operand has 55 places, 55 transitions, 315 flow. Second operand 5 states and 123 transitions. [2024-06-21 15:43:53,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 78 transitions, 554 flow [2024-06-21 15:43:53,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 78 transitions, 531 flow, removed 8 selfloop flow, removed 1 redundant places. [2024-06-21 15:43:53,864 INFO L231 Difference]: Finished difference. Result has 60 places, 64 transitions, 427 flow [2024-06-21 15:43:53,865 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=292, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=427, PETRI_PLACES=60, PETRI_TRANSITIONS=64} [2024-06-21 15:43:53,865 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 20 predicate places. [2024-06-21 15:43:53,865 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 64 transitions, 427 flow [2024-06-21 15:43:53,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:53,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:43:53,866 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:43:53,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 15:43:53,866 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:43:53,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:43:53,866 INFO L85 PathProgramCache]: Analyzing trace with hash 1897586958, now seen corresponding path program 2 times [2024-06-21 15:43:53,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:43:53,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733521292] [2024-06-21 15:43:53,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:43:53,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:43:53,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:43:53,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:43:53,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:43:53,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733521292] [2024-06-21 15:43:53,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733521292] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:43:53,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:43:53,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:43:53,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117514702] [2024-06-21 15:43:53,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:43:53,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:43:53,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:43:53,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:43:53,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:43:53,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 15:43:53,965 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 64 transitions, 427 flow. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:53,965 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:43:53,965 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 15:43:53,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:43:54,130 INFO L124 PetriNetUnfolderBase]: 795/1342 cut-off events. [2024-06-21 15:43:54,131 INFO L125 PetriNetUnfolderBase]: For 4227/4241 co-relation queries the response was YES. [2024-06-21 15:43:54,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5152 conditions, 1342 events. 795/1342 cut-off events. For 4227/4241 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 6707 event pairs, 271 based on Foata normal form. 16/1357 useless extension candidates. Maximal degree in co-relation 5126. Up to 1148 conditions per place. [2024-06-21 15:43:54,139 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 58 selfloop transitions, 13 changer transitions 0/78 dead transitions. [2024-06-21 15:43:54,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 78 transitions, 605 flow [2024-06-21 15:43:54,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 15:43:54,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 15:43:54,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 103 transitions. [2024-06-21 15:43:54,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6602564102564102 [2024-06-21 15:43:54,141 INFO L175 Difference]: Start difference. First operand has 60 places, 64 transitions, 427 flow. Second operand 4 states and 103 transitions. [2024-06-21 15:43:54,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 78 transitions, 605 flow [2024-06-21 15:43:54,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 78 transitions, 578 flow, removed 10 selfloop flow, removed 1 redundant places. [2024-06-21 15:43:54,147 INFO L231 Difference]: Finished difference. Result has 63 places, 64 transitions, 438 flow [2024-06-21 15:43:54,148 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=400, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=438, PETRI_PLACES=63, PETRI_TRANSITIONS=64} [2024-06-21 15:43:54,148 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 23 predicate places. [2024-06-21 15:43:54,148 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 64 transitions, 438 flow [2024-06-21 15:43:54,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:54,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:43:54,149 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:43:54,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 15:43:54,149 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:43:54,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:43:54,150 INFO L85 PathProgramCache]: Analyzing trace with hash -687550554, now seen corresponding path program 2 times [2024-06-21 15:43:54,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:43:54,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74845894] [2024-06-21 15:43:54,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:43:54,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:43:54,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:43:54,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:43:54,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:43:54,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74845894] [2024-06-21 15:43:54,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74845894] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:43:54,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:43:54,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:43:54,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480606603] [2024-06-21 15:43:54,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:43:54,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:43:54,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:43:54,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:43:54,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:43:54,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 15:43:54,253 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 64 transitions, 438 flow. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:54,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:43:54,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 15:43:54,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:43:54,365 INFO L124 PetriNetUnfolderBase]: 805/1335 cut-off events. [2024-06-21 15:43:54,366 INFO L125 PetriNetUnfolderBase]: For 4916/4930 co-relation queries the response was YES. [2024-06-21 15:43:54,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5341 conditions, 1335 events. 805/1335 cut-off events. For 4916/4930 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 6573 event pairs, 267 based on Foata normal form. 17/1345 useless extension candidates. Maximal degree in co-relation 5313. Up to 1092 conditions per place. [2024-06-21 15:43:54,375 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 55 selfloop transitions, 31 changer transitions 0/93 dead transitions. [2024-06-21 15:43:54,375 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 93 transitions, 764 flow [2024-06-21 15:43:54,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:43:54,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:43:54,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 127 transitions. [2024-06-21 15:43:54,376 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6512820512820513 [2024-06-21 15:43:54,376 INFO L175 Difference]: Start difference. First operand has 63 places, 64 transitions, 438 flow. Second operand 5 states and 127 transitions. [2024-06-21 15:43:54,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 93 transitions, 764 flow [2024-06-21 15:43:54,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 93 transitions, 726 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-21 15:43:54,382 INFO L231 Difference]: Finished difference. Result has 66 places, 75 transitions, 582 flow [2024-06-21 15:43:54,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=406, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=582, PETRI_PLACES=66, PETRI_TRANSITIONS=75} [2024-06-21 15:43:54,383 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 26 predicate places. [2024-06-21 15:43:54,383 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 75 transitions, 582 flow [2024-06-21 15:43:54,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:54,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:43:54,384 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:43:54,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 15:43:54,384 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:43:54,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:43:54,384 INFO L85 PathProgramCache]: Analyzing trace with hash -687541626, now seen corresponding path program 1 times [2024-06-21 15:43:54,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:43:54,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078907236] [2024-06-21 15:43:54,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:43:54,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:43:54,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:43:54,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:43:54,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:43:54,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078907236] [2024-06-21 15:43:54,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078907236] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:43:54,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:43:54,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:43:54,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378467796] [2024-06-21 15:43:54,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:43:54,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:43:54,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:43:54,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:43:54,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:43:54,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 15:43:54,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 75 transitions, 582 flow. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:54,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:43:54,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 15:43:54,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:43:54,626 INFO L124 PetriNetUnfolderBase]: 835/1398 cut-off events. [2024-06-21 15:43:54,626 INFO L125 PetriNetUnfolderBase]: For 5763/5769 co-relation queries the response was YES. [2024-06-21 15:43:54,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5897 conditions, 1398 events. 835/1398 cut-off events. For 5763/5769 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 6980 event pairs, 242 based on Foata normal form. 18/1412 useless extension candidates. Maximal degree in co-relation 5867. Up to 1175 conditions per place. [2024-06-21 15:43:54,636 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 81 selfloop transitions, 13 changer transitions 0/101 dead transitions. [2024-06-21 15:43:54,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 101 transitions, 892 flow [2024-06-21 15:43:54,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:43:54,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:43:54,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 126 transitions. [2024-06-21 15:43:54,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6461538461538462 [2024-06-21 15:43:54,637 INFO L175 Difference]: Start difference. First operand has 66 places, 75 transitions, 582 flow. Second operand 5 states and 126 transitions. [2024-06-21 15:43:54,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 101 transitions, 892 flow [2024-06-21 15:43:54,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 101 transitions, 856 flow, removed 18 selfloop flow, removed 0 redundant places. [2024-06-21 15:43:54,644 INFO L231 Difference]: Finished difference. Result has 71 places, 77 transitions, 606 flow [2024-06-21 15:43:54,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=550, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=606, PETRI_PLACES=71, PETRI_TRANSITIONS=77} [2024-06-21 15:43:54,645 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 31 predicate places. [2024-06-21 15:43:54,645 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 77 transitions, 606 flow [2024-06-21 15:43:54,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:54,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:43:54,645 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:43:54,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 15:43:54,646 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:43:54,646 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:43:54,646 INFO L85 PathProgramCache]: Analyzing trace with hash 1548956050, now seen corresponding path program 1 times [2024-06-21 15:43:54,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:43:54,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045769426] [2024-06-21 15:43:54,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:43:54,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:43:54,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:43:54,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:43:54,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:43:54,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045769426] [2024-06-21 15:43:54,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045769426] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:43:54,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:43:54,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 15:43:54,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890551897] [2024-06-21 15:43:54,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:43:54,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 15:43:54,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:43:54,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 15:43:54,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 15:43:54,716 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 39 [2024-06-21 15:43:54,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 77 transitions, 606 flow. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:54,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:43:54,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 39 [2024-06-21 15:43:54,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:43:54,808 INFO L124 PetriNetUnfolderBase]: 760/1286 cut-off events. [2024-06-21 15:43:54,808 INFO L125 PetriNetUnfolderBase]: For 5934/5939 co-relation queries the response was YES. [2024-06-21 15:43:54,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5406 conditions, 1286 events. 760/1286 cut-off events. For 5934/5939 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 6460 event pairs, 246 based on Foata normal form. 6/1273 useless extension candidates. Maximal degree in co-relation 5373. Up to 1115 conditions per place. [2024-06-21 15:43:54,818 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 64 selfloop transitions, 12 changer transitions 0/87 dead transitions. [2024-06-21 15:43:54,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 87 transitions, 797 flow [2024-06-21 15:43:54,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 15:43:54,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 15:43:54,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 99 transitions. [2024-06-21 15:43:54,819 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6346153846153846 [2024-06-21 15:43:54,819 INFO L175 Difference]: Start difference. First operand has 71 places, 77 transitions, 606 flow. Second operand 4 states and 99 transitions. [2024-06-21 15:43:54,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 87 transitions, 797 flow [2024-06-21 15:43:54,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 87 transitions, 763 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-21 15:43:54,825 INFO L231 Difference]: Finished difference. Result has 73 places, 79 transitions, 637 flow [2024-06-21 15:43:54,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=572, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=637, PETRI_PLACES=73, PETRI_TRANSITIONS=79} [2024-06-21 15:43:54,826 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 33 predicate places. [2024-06-21 15:43:54,826 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 79 transitions, 637 flow [2024-06-21 15:43:54,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:54,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:43:54,827 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:43:54,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 15:43:54,827 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:43:54,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:43:54,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1616664564, now seen corresponding path program 1 times [2024-06-21 15:43:54,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:43:54,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598911255] [2024-06-21 15:43:54,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:43:54,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:43:54,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:43:54,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:43:54,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:43:54,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598911255] [2024-06-21 15:43:54,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598911255] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:43:54,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:43:54,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:43:54,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824804617] [2024-06-21 15:43:54,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:43:54,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:43:54,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:43:54,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:43:54,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:43:54,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 15:43:54,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 79 transitions, 637 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:54,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:43:54,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 15:43:54,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:43:55,124 INFO L124 PetriNetUnfolderBase]: 886/1493 cut-off events. [2024-06-21 15:43:55,125 INFO L125 PetriNetUnfolderBase]: For 6889/6903 co-relation queries the response was YES. [2024-06-21 15:43:55,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6279 conditions, 1493 events. 886/1493 cut-off events. For 6889/6903 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 7658 event pairs, 249 based on Foata normal form. 17/1509 useless extension candidates. Maximal degree in co-relation 6244. Up to 1152 conditions per place. [2024-06-21 15:43:55,135 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 80 selfloop transitions, 42 changer transitions 0/129 dead transitions. [2024-06-21 15:43:55,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 129 transitions, 1151 flow [2024-06-21 15:43:55,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 15:43:55,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 15:43:55,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 218 transitions. [2024-06-21 15:43:55,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6210826210826211 [2024-06-21 15:43:55,136 INFO L175 Difference]: Start difference. First operand has 73 places, 79 transitions, 637 flow. Second operand 9 states and 218 transitions. [2024-06-21 15:43:55,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 129 transitions, 1151 flow [2024-06-21 15:43:55,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 129 transitions, 1139 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-06-21 15:43:55,144 INFO L231 Difference]: Finished difference. Result has 83 places, 91 transitions, 831 flow [2024-06-21 15:43:55,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=625, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=831, PETRI_PLACES=83, PETRI_TRANSITIONS=91} [2024-06-21 15:43:55,145 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 43 predicate places. [2024-06-21 15:43:55,145 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 91 transitions, 831 flow [2024-06-21 15:43:55,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:55,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:43:55,145 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:43:55,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 15:43:55,145 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:43:55,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:43:55,146 INFO L85 PathProgramCache]: Analyzing trace with hash -1304345368, now seen corresponding path program 2 times [2024-06-21 15:43:55,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:43:55,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981857992] [2024-06-21 15:43:55,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:43:55,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:43:55,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:43:55,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:43:55,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:43:55,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981857992] [2024-06-21 15:43:55,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981857992] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:43:55,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:43:55,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:43:55,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759400533] [2024-06-21 15:43:55,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:43:55,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:43:55,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:43:55,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:43:55,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:43:55,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 15:43:55,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 91 transitions, 831 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:55,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:43:55,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 15:43:55,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:43:55,447 INFO L124 PetriNetUnfolderBase]: 904/1526 cut-off events. [2024-06-21 15:43:55,448 INFO L125 PetriNetUnfolderBase]: For 9411/9425 co-relation queries the response was YES. [2024-06-21 15:43:55,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7117 conditions, 1526 events. 904/1526 cut-off events. For 9411/9425 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 7874 event pairs, 250 based on Foata normal form. 17/1542 useless extension candidates. Maximal degree in co-relation 7078. Up to 1204 conditions per place. [2024-06-21 15:43:55,457 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 82 selfloop transitions, 34 changer transitions 0/123 dead transitions. [2024-06-21 15:43:55,457 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 123 transitions, 1264 flow [2024-06-21 15:43:55,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:43:55,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:43:55,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-21 15:43:55,458 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6623931623931624 [2024-06-21 15:43:55,459 INFO L175 Difference]: Start difference. First operand has 83 places, 91 transitions, 831 flow. Second operand 6 states and 155 transitions. [2024-06-21 15:43:55,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 123 transitions, 1264 flow [2024-06-21 15:43:55,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 123 transitions, 1167 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-21 15:43:55,470 INFO L231 Difference]: Finished difference. Result has 86 places, 96 transitions, 885 flow [2024-06-21 15:43:55,470 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=742, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=885, PETRI_PLACES=86, PETRI_TRANSITIONS=96} [2024-06-21 15:43:55,471 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 46 predicate places. [2024-06-21 15:43:55,471 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 96 transitions, 885 flow [2024-06-21 15:43:55,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:55,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:43:55,471 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:43:55,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 15:43:55,471 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:43:55,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:43:55,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1304339788, now seen corresponding path program 3 times [2024-06-21 15:43:55,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:43:55,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482665245] [2024-06-21 15:43:55,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:43:55,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:43:55,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:43:55,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:43:55,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:43:55,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482665245] [2024-06-21 15:43:55,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482665245] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:43:55,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:43:55,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:43:55,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621732001] [2024-06-21 15:43:55,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:43:55,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:43:55,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:43:55,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:43:55,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:43:55,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 15:43:55,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 96 transitions, 885 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:55,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:43:55,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 15:43:55,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:43:55,813 INFO L124 PetriNetUnfolderBase]: 906/1532 cut-off events. [2024-06-21 15:43:55,814 INFO L125 PetriNetUnfolderBase]: For 10805/10819 co-relation queries the response was YES. [2024-06-21 15:43:55,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7415 conditions, 1532 events. 906/1532 cut-off events. For 10805/10819 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 7930 event pairs, 250 based on Foata normal form. 17/1548 useless extension candidates. Maximal degree in co-relation 7373. Up to 1209 conditions per place. [2024-06-21 15:43:55,822 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 81 selfloop transitions, 42 changer transitions 0/130 dead transitions. [2024-06-21 15:43:55,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 130 transitions, 1303 flow [2024-06-21 15:43:55,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:43:55,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:43:55,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-21 15:43:55,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-21 15:43:55,824 INFO L175 Difference]: Start difference. First operand has 86 places, 96 transitions, 885 flow. Second operand 8 states and 195 transitions. [2024-06-21 15:43:55,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 130 transitions, 1303 flow [2024-06-21 15:43:55,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 130 transitions, 1228 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-21 15:43:55,837 INFO L231 Difference]: Finished difference. Result has 91 places, 100 transitions, 953 flow [2024-06-21 15:43:55,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=813, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=953, PETRI_PLACES=91, PETRI_TRANSITIONS=100} [2024-06-21 15:43:55,838 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 51 predicate places. [2024-06-21 15:43:55,838 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 100 transitions, 953 flow [2024-06-21 15:43:55,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:55,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:43:55,839 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:43:55,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 15:43:55,839 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:43:55,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:43:55,839 INFO L85 PathProgramCache]: Analyzing trace with hash 160770198, now seen corresponding path program 4 times [2024-06-21 15:43:55,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:43:55,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096895012] [2024-06-21 15:43:55,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:43:55,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:43:55,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:43:55,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:43:55,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:43:55,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096895012] [2024-06-21 15:43:55,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096895012] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:43:55,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:43:55,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:43:55,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769349779] [2024-06-21 15:43:55,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:43:55,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:43:55,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:43:55,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:43:55,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:43:55,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 15:43:55,966 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 100 transitions, 953 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:55,966 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:43:55,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 15:43:55,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:43:56,155 INFO L124 PetriNetUnfolderBase]: 930/1568 cut-off events. [2024-06-21 15:43:56,155 INFO L125 PetriNetUnfolderBase]: For 12693/12707 co-relation queries the response was YES. [2024-06-21 15:43:56,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7761 conditions, 1568 events. 930/1568 cut-off events. For 12693/12707 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 8126 event pairs, 255 based on Foata normal form. 17/1578 useless extension candidates. Maximal degree in co-relation 7718. Up to 1171 conditions per place. [2024-06-21 15:43:56,165 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 80 selfloop transitions, 60 changer transitions 0/147 dead transitions. [2024-06-21 15:43:56,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 147 transitions, 1535 flow [2024-06-21 15:43:56,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:43:56,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:43:56,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-21 15:43:56,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6410256410256411 [2024-06-21 15:43:56,167 INFO L175 Difference]: Start difference. First operand has 91 places, 100 transitions, 953 flow. Second operand 8 states and 200 transitions. [2024-06-21 15:43:56,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 147 transitions, 1535 flow [2024-06-21 15:43:56,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 147 transitions, 1431 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-21 15:43:56,183 INFO L231 Difference]: Finished difference. Result has 94 places, 112 transitions, 1125 flow [2024-06-21 15:43:56,183 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=849, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1125, PETRI_PLACES=94, PETRI_TRANSITIONS=112} [2024-06-21 15:43:56,184 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 54 predicate places. [2024-06-21 15:43:56,184 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 112 transitions, 1125 flow [2024-06-21 15:43:56,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:56,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:43:56,185 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:43:56,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 15:43:56,185 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:43:56,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:43:56,185 INFO L85 PathProgramCache]: Analyzing trace with hash 1068728269, now seen corresponding path program 1 times [2024-06-21 15:43:56,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:43:56,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346670907] [2024-06-21 15:43:56,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:43:56,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:43:56,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:43:56,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:43:56,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:43:56,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346670907] [2024-06-21 15:43:56,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346670907] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:43:56,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:43:56,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:43:56,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782950683] [2024-06-21 15:43:56,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:43:56,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:43:56,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:43:56,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:43:56,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:43:56,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 15:43:56,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 112 transitions, 1125 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:56,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:43:56,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 15:43:56,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:43:56,552 INFO L124 PetriNetUnfolderBase]: 947/1597 cut-off events. [2024-06-21 15:43:56,552 INFO L125 PetriNetUnfolderBase]: For 15676/15690 co-relation queries the response was YES. [2024-06-21 15:43:56,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8493 conditions, 1597 events. 947/1597 cut-off events. For 15676/15690 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 8285 event pairs, 164 based on Foata normal form. 18/1614 useless extension candidates. Maximal degree in co-relation 8448. Up to 1278 conditions per place. [2024-06-21 15:43:56,563 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 112 selfloop transitions, 23 changer transitions 0/142 dead transitions. [2024-06-21 15:43:56,564 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 142 transitions, 1585 flow [2024-06-21 15:43:56,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:43:56,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:43:56,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-21 15:43:56,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6324786324786325 [2024-06-21 15:43:56,565 INFO L175 Difference]: Start difference. First operand has 94 places, 112 transitions, 1125 flow. Second operand 6 states and 148 transitions. [2024-06-21 15:43:56,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 142 transitions, 1585 flow [2024-06-21 15:43:56,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 142 transitions, 1485 flow, removed 30 selfloop flow, removed 3 redundant places. [2024-06-21 15:43:56,585 INFO L231 Difference]: Finished difference. Result has 97 places, 116 transitions, 1158 flow [2024-06-21 15:43:56,585 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1025, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1158, PETRI_PLACES=97, PETRI_TRANSITIONS=116} [2024-06-21 15:43:56,586 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 57 predicate places. [2024-06-21 15:43:56,586 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 116 transitions, 1158 flow [2024-06-21 15:43:56,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:56,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:43:56,587 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:43:56,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 15:43:56,587 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:43:56,587 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:43:56,587 INFO L85 PathProgramCache]: Analyzing trace with hash 1068788719, now seen corresponding path program 2 times [2024-06-21 15:43:56,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:43:56,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782148246] [2024-06-21 15:43:56,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:43:56,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:43:56,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:43:56,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:43:56,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:43:56,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782148246] [2024-06-21 15:43:56,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782148246] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:43:56,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:43:56,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:43:56,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373821978] [2024-06-21 15:43:56,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:43:56,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:43:56,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:43:56,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:43:56,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:43:56,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 15:43:56,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 116 transitions, 1158 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:56,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:43:56,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 15:43:56,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:43:56,951 INFO L124 PetriNetUnfolderBase]: 964/1624 cut-off events. [2024-06-21 15:43:56,951 INFO L125 PetriNetUnfolderBase]: For 17583/17597 co-relation queries the response was YES. [2024-06-21 15:43:56,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8831 conditions, 1624 events. 964/1624 cut-off events. For 17583/17597 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 8458 event pairs, 235 based on Foata normal form. 18/1641 useless extension candidates. Maximal degree in co-relation 8784. Up to 1369 conditions per place. [2024-06-21 15:43:56,961 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 114 selfloop transitions, 20 changer transitions 0/141 dead transitions. [2024-06-21 15:43:56,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 141 transitions, 1526 flow [2024-06-21 15:43:56,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:43:56,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:43:56,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-21 15:43:56,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6196581196581197 [2024-06-21 15:43:56,962 INFO L175 Difference]: Start difference. First operand has 97 places, 116 transitions, 1158 flow. Second operand 6 states and 145 transitions. [2024-06-21 15:43:56,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 141 transitions, 1526 flow [2024-06-21 15:43:56,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 141 transitions, 1449 flow, removed 29 selfloop flow, removed 2 redundant places. [2024-06-21 15:43:56,980 INFO L231 Difference]: Finished difference. Result has 101 places, 118 transitions, 1174 flow [2024-06-21 15:43:56,981 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1093, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1174, PETRI_PLACES=101, PETRI_TRANSITIONS=118} [2024-06-21 15:43:56,981 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 61 predicate places. [2024-06-21 15:43:56,981 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 118 transitions, 1174 flow [2024-06-21 15:43:56,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:56,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:43:56,982 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:43:56,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 15:43:56,983 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:43:56,983 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:43:56,983 INFO L85 PathProgramCache]: Analyzing trace with hash -1780004595, now seen corresponding path program 3 times [2024-06-21 15:43:56,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:43:56,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917361681] [2024-06-21 15:43:56,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:43:56,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:43:56,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:43:57,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:43:57,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:43:57,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917361681] [2024-06-21 15:43:57,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917361681] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:43:57,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:43:57,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:43:57,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200661921] [2024-06-21 15:43:57,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:43:57,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:43:57,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:43:57,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:43:57,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:43:57,121 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 15:43:57,121 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 118 transitions, 1174 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:57,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:43:57,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 15:43:57,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:43:57,301 INFO L124 PetriNetUnfolderBase]: 956/1612 cut-off events. [2024-06-21 15:43:57,302 INFO L125 PetriNetUnfolderBase]: For 18285/18299 co-relation queries the response was YES. [2024-06-21 15:43:57,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8694 conditions, 1612 events. 956/1612 cut-off events. For 18285/18299 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 8363 event pairs, 162 based on Foata normal form. 18/1629 useless extension candidates. Maximal degree in co-relation 8645. Up to 1336 conditions per place. [2024-06-21 15:43:57,313 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 111 selfloop transitions, 19 changer transitions 0/137 dead transitions. [2024-06-21 15:43:57,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 137 transitions, 1482 flow [2024-06-21 15:43:57,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:43:57,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:43:57,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 125 transitions. [2024-06-21 15:43:57,315 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6410256410256411 [2024-06-21 15:43:57,315 INFO L175 Difference]: Start difference. First operand has 101 places, 118 transitions, 1174 flow. Second operand 5 states and 125 transitions. [2024-06-21 15:43:57,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 137 transitions, 1482 flow [2024-06-21 15:43:57,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 137 transitions, 1403 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-21 15:43:57,339 INFO L231 Difference]: Finished difference. Result has 102 places, 118 transitions, 1143 flow [2024-06-21 15:43:57,339 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1095, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1143, PETRI_PLACES=102, PETRI_TRANSITIONS=118} [2024-06-21 15:43:57,340 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 62 predicate places. [2024-06-21 15:43:57,340 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 118 transitions, 1143 flow [2024-06-21 15:43:57,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:57,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:43:57,340 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:43:57,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 15:43:57,341 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:43:57,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:43:57,341 INFO L85 PathProgramCache]: Analyzing trace with hash -1779819897, now seen corresponding path program 1 times [2024-06-21 15:43:57,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:43:57,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366629065] [2024-06-21 15:43:57,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:43:57,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:43:57,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:43:57,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:43:57,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:43:57,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366629065] [2024-06-21 15:43:57,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366629065] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:43:57,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:43:57,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:43:57,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256031613] [2024-06-21 15:43:57,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:43:57,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:43:57,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:43:57,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:43:57,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:43:57,453 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 15:43:57,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 118 transitions, 1143 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:57,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:43:57,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 15:43:57,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:43:57,636 INFO L124 PetriNetUnfolderBase]: 1011/1699 cut-off events. [2024-06-21 15:43:57,637 INFO L125 PetriNetUnfolderBase]: For 20922/20936 co-relation queries the response was YES. [2024-06-21 15:43:57,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9082 conditions, 1699 events. 1011/1699 cut-off events. For 20922/20936 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 8899 event pairs, 213 based on Foata normal form. 26/1724 useless extension candidates. Maximal degree in co-relation 9032. Up to 1334 conditions per place. [2024-06-21 15:43:57,649 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 106 selfloop transitions, 29 changer transitions 0/142 dead transitions. [2024-06-21 15:43:57,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 142 transitions, 1553 flow [2024-06-21 15:43:57,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:43:57,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:43:57,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-21 15:43:57,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6324786324786325 [2024-06-21 15:43:57,650 INFO L175 Difference]: Start difference. First operand has 102 places, 118 transitions, 1143 flow. Second operand 6 states and 148 transitions. [2024-06-21 15:43:57,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 142 transitions, 1553 flow [2024-06-21 15:43:57,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 142 transitions, 1508 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-21 15:43:57,671 INFO L231 Difference]: Finished difference. Result has 104 places, 120 transitions, 1204 flow [2024-06-21 15:43:57,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1098, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1204, PETRI_PLACES=104, PETRI_TRANSITIONS=120} [2024-06-21 15:43:57,671 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 64 predicate places. [2024-06-21 15:43:57,672 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 120 transitions, 1204 flow [2024-06-21 15:43:57,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:57,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:43:57,672 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:43:57,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 15:43:57,672 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:43:57,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:43:57,673 INFO L85 PathProgramCache]: Analyzing trace with hash 455456689, now seen corresponding path program 1 times [2024-06-21 15:43:57,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:43:57,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259619051] [2024-06-21 15:43:57,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:43:57,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:43:57,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:43:57,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:43:57,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:43:57,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259619051] [2024-06-21 15:43:57,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259619051] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:43:57,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:43:57,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 15:43:57,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831999671] [2024-06-21 15:43:57,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:43:57,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 15:43:57,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:43:57,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 15:43:57,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-21 15:43:57,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 39 [2024-06-21 15:43:57,753 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 120 transitions, 1204 flow. Second operand has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:57,753 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:43:57,753 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 39 [2024-06-21 15:43:57,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:43:57,938 INFO L124 PetriNetUnfolderBase]: 937/1588 cut-off events. [2024-06-21 15:43:57,939 INFO L125 PetriNetUnfolderBase]: For 21123/21130 co-relation queries the response was YES. [2024-06-21 15:43:57,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8815 conditions, 1588 events. 937/1588 cut-off events. For 21123/21130 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 8345 event pairs, 214 based on Foata normal form. 8/1578 useless extension candidates. Maximal degree in co-relation 8764. Up to 1337 conditions per place. [2024-06-21 15:43:57,950 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 94 selfloop transitions, 25 changer transitions 0/132 dead transitions. [2024-06-21 15:43:57,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 132 transitions, 1472 flow [2024-06-21 15:43:57,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:43:57,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:43:57,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 123 transitions. [2024-06-21 15:43:57,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6307692307692307 [2024-06-21 15:43:57,951 INFO L175 Difference]: Start difference. First operand has 104 places, 120 transitions, 1204 flow. Second operand 5 states and 123 transitions. [2024-06-21 15:43:57,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 132 transitions, 1472 flow [2024-06-21 15:43:57,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 132 transitions, 1394 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-21 15:43:57,974 INFO L231 Difference]: Finished difference. Result has 105 places, 120 transitions, 1192 flow [2024-06-21 15:43:57,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1126, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1192, PETRI_PLACES=105, PETRI_TRANSITIONS=120} [2024-06-21 15:43:57,974 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 65 predicate places. [2024-06-21 15:43:57,975 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 120 transitions, 1192 flow [2024-06-21 15:43:57,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:57,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:43:57,975 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:43:57,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 15:43:57,975 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:43:57,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:43:57,976 INFO L85 PathProgramCache]: Analyzing trace with hash 688916709, now seen corresponding path program 2 times [2024-06-21 15:43:57,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:43:57,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170844475] [2024-06-21 15:43:57,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:43:57,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:43:57,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:43:58,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:43:58,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:43:58,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170844475] [2024-06-21 15:43:58,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170844475] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:43:58,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:43:58,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:43:58,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513861381] [2024-06-21 15:43:58,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:43:58,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:43:58,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:43:58,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:43:58,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:43:58,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 15:43:58,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 120 transitions, 1192 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:58,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:43:58,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 15:43:58,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:43:58,281 INFO L124 PetriNetUnfolderBase]: 1033/1728 cut-off events. [2024-06-21 15:43:58,282 INFO L125 PetriNetUnfolderBase]: For 24450/24464 co-relation queries the response was YES. [2024-06-21 15:43:58,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9437 conditions, 1728 events. 1033/1728 cut-off events. For 24450/24464 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 9006 event pairs, 244 based on Foata normal form. 26/1747 useless extension candidates. Maximal degree in co-relation 9385. Up to 1402 conditions per place. [2024-06-21 15:43:58,296 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 108 selfloop transitions, 33 changer transitions 0/148 dead transitions. [2024-06-21 15:43:58,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 148 transitions, 1668 flow [2024-06-21 15:43:58,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:43:58,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:43:58,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-21 15:43:58,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6452991452991453 [2024-06-21 15:43:58,298 INFO L175 Difference]: Start difference. First operand has 105 places, 120 transitions, 1192 flow. Second operand 6 states and 151 transitions. [2024-06-21 15:43:58,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 148 transitions, 1668 flow [2024-06-21 15:43:58,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 148 transitions, 1605 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-21 15:43:58,341 INFO L231 Difference]: Finished difference. Result has 106 places, 122 transitions, 1247 flow [2024-06-21 15:43:58,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1133, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1247, PETRI_PLACES=106, PETRI_TRANSITIONS=122} [2024-06-21 15:43:58,341 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 66 predicate places. [2024-06-21 15:43:58,341 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 122 transitions, 1247 flow [2024-06-21 15:43:58,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:58,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:43:58,342 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:43:58,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 15:43:58,342 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:43:58,343 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:43:58,343 INFO L85 PathProgramCache]: Analyzing trace with hash 697487589, now seen corresponding path program 3 times [2024-06-21 15:43:58,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:43:58,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292011061] [2024-06-21 15:43:58,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:43:58,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:43:58,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:43:58,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:43:58,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:43:58,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292011061] [2024-06-21 15:43:58,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292011061] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:43:58,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:43:58,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:43:58,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328717489] [2024-06-21 15:43:58,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:43:58,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:43:58,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:43:58,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:43:58,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:43:58,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 15:43:58,453 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 122 transitions, 1247 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:58,453 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:43:58,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 15:43:58,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:43:58,644 INFO L124 PetriNetUnfolderBase]: 1099/1830 cut-off events. [2024-06-21 15:43:58,645 INFO L125 PetriNetUnfolderBase]: For 26022/26036 co-relation queries the response was YES. [2024-06-21 15:43:58,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10082 conditions, 1830 events. 1099/1830 cut-off events. For 26022/26036 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 9612 event pairs, 225 based on Foata normal form. 26/1849 useless extension candidates. Maximal degree in co-relation 10030. Up to 1285 conditions per place. [2024-06-21 15:43:58,658 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 110 selfloop transitions, 39 changer transitions 0/156 dead transitions. [2024-06-21 15:43:58,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 156 transitions, 1815 flow [2024-06-21 15:43:58,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:43:58,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:43:58,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-21 15:43:58,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6623931623931624 [2024-06-21 15:43:58,660 INFO L175 Difference]: Start difference. First operand has 106 places, 122 transitions, 1247 flow. Second operand 6 states and 155 transitions. [2024-06-21 15:43:58,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 156 transitions, 1815 flow [2024-06-21 15:43:58,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 156 transitions, 1723 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-21 15:43:58,690 INFO L231 Difference]: Finished difference. Result has 108 places, 125 transitions, 1294 flow [2024-06-21 15:43:58,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1155, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1294, PETRI_PLACES=108, PETRI_TRANSITIONS=125} [2024-06-21 15:43:58,691 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 68 predicate places. [2024-06-21 15:43:58,691 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 125 transitions, 1294 flow [2024-06-21 15:43:58,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:58,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:43:58,692 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:43:58,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 15:43:58,692 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:43:58,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:43:58,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1806019241, now seen corresponding path program 2 times [2024-06-21 15:43:58,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:43:58,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803224857] [2024-06-21 15:43:58,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:43:58,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:43:58,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:43:58,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:43:58,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:43:58,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803224857] [2024-06-21 15:43:58,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803224857] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:43:58,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:43:58,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 15:43:58,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363594072] [2024-06-21 15:43:58,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:43:58,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 15:43:58,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:43:58,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 15:43:58,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 15:43:58,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 39 [2024-06-21 15:43:58,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 125 transitions, 1294 flow. Second operand has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:58,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:43:58,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 39 [2024-06-21 15:43:58,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:43:58,948 INFO L124 PetriNetUnfolderBase]: 1047/1750 cut-off events. [2024-06-21 15:43:58,948 INFO L125 PetriNetUnfolderBase]: For 26937/26944 co-relation queries the response was YES. [2024-06-21 15:43:58,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9932 conditions, 1750 events. 1047/1750 cut-off events. For 26937/26944 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 9309 event pairs, 262 based on Foata normal form. 8/1738 useless extension candidates. Maximal degree in co-relation 9879. Up to 1481 conditions per place. [2024-06-21 15:43:58,963 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 90 selfloop transitions, 36 changer transitions 0/139 dead transitions. [2024-06-21 15:43:58,963 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 139 transitions, 1685 flow [2024-06-21 15:43:58,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:43:58,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:43:58,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 123 transitions. [2024-06-21 15:43:58,964 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6307692307692307 [2024-06-21 15:43:58,964 INFO L175 Difference]: Start difference. First operand has 108 places, 125 transitions, 1294 flow. Second operand 5 states and 123 transitions. [2024-06-21 15:43:58,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 139 transitions, 1685 flow [2024-06-21 15:43:58,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 139 transitions, 1610 flow, removed 17 selfloop flow, removed 2 redundant places. [2024-06-21 15:43:58,992 INFO L231 Difference]: Finished difference. Result has 111 places, 128 transitions, 1335 flow [2024-06-21 15:43:58,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1222, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1335, PETRI_PLACES=111, PETRI_TRANSITIONS=128} [2024-06-21 15:43:58,992 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 71 predicate places. [2024-06-21 15:43:58,993 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 128 transitions, 1335 flow [2024-06-21 15:43:58,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:58,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:43:58,994 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:43:58,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 15:43:58,994 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:43:58,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:43:58,995 INFO L85 PathProgramCache]: Analyzing trace with hash 1314658383, now seen corresponding path program 1 times [2024-06-21 15:43:58,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:43:58,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370285390] [2024-06-21 15:43:58,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:43:58,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:43:59,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:43:59,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:43:59,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:43:59,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370285390] [2024-06-21 15:43:59,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370285390] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:43:59,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:43:59,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 15:43:59,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94822405] [2024-06-21 15:43:59,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:43:59,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 15:43:59,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:43:59,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 15:43:59,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-21 15:43:59,092 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 39 [2024-06-21 15:43:59,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 128 transitions, 1335 flow. Second operand has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:59,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:43:59,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 39 [2024-06-21 15:43:59,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:43:59,246 INFO L124 PetriNetUnfolderBase]: 1061/1782 cut-off events. [2024-06-21 15:43:59,246 INFO L125 PetriNetUnfolderBase]: For 28938/28943 co-relation queries the response was YES. [2024-06-21 15:43:59,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10023 conditions, 1782 events. 1061/1782 cut-off events. For 28938/28943 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 9525 event pairs, 247 based on Foata normal form. 15/1780 useless extension candidates. Maximal degree in co-relation 9968. Up to 1534 conditions per place. [2024-06-21 15:43:59,258 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 116 selfloop transitions, 14 changer transitions 0/143 dead transitions. [2024-06-21 15:43:59,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 143 transitions, 1663 flow [2024-06-21 15:43:59,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:43:59,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:43:59,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 121 transitions. [2024-06-21 15:43:59,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6205128205128205 [2024-06-21 15:43:59,261 INFO L175 Difference]: Start difference. First operand has 111 places, 128 transitions, 1335 flow. Second operand 5 states and 121 transitions. [2024-06-21 15:43:59,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 143 transitions, 1663 flow [2024-06-21 15:43:59,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 143 transitions, 1558 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-21 15:43:59,288 INFO L231 Difference]: Finished difference. Result has 112 places, 130 transitions, 1290 flow [2024-06-21 15:43:59,288 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1230, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1290, PETRI_PLACES=112, PETRI_TRANSITIONS=130} [2024-06-21 15:43:59,289 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 72 predicate places. [2024-06-21 15:43:59,289 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 130 transitions, 1290 flow [2024-06-21 15:43:59,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:59,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:43:59,289 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:43:59,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 15:43:59,290 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:43:59,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:43:59,290 INFO L85 PathProgramCache]: Analyzing trace with hash -452333815, now seen corresponding path program 1 times [2024-06-21 15:43:59,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:43:59,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134162799] [2024-06-21 15:43:59,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:43:59,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:43:59,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:43:59,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:43:59,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:43:59,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134162799] [2024-06-21 15:43:59,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134162799] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:43:59,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:43:59,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:43:59,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312686617] [2024-06-21 15:43:59,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:43:59,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:43:59,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:43:59,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:43:59,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:43:59,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 15:43:59,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 130 transitions, 1290 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:59,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:43:59,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 15:43:59,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:43:59,768 INFO L124 PetriNetUnfolderBase]: 1679/2879 cut-off events. [2024-06-21 15:43:59,769 INFO L125 PetriNetUnfolderBase]: For 57721/57735 co-relation queries the response was YES. [2024-06-21 15:43:59,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16123 conditions, 2879 events. 1679/2879 cut-off events. For 57721/57735 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 17512 event pairs, 441 based on Foata normal form. 50/2928 useless extension candidates. Maximal degree in co-relation 16069. Up to 1290 conditions per place. [2024-06-21 15:43:59,790 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 136 selfloop transitions, 49 changer transitions 0/192 dead transitions. [2024-06-21 15:43:59,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 192 transitions, 2144 flow [2024-06-21 15:43:59,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 15:43:59,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 15:43:59,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 234 transitions. [2024-06-21 15:43:59,792 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-21 15:43:59,792 INFO L175 Difference]: Start difference. First operand has 112 places, 130 transitions, 1290 flow. Second operand 9 states and 234 transitions. [2024-06-21 15:43:59,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 192 transitions, 2144 flow [2024-06-21 15:43:59,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 192 transitions, 2106 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-21 15:43:59,840 INFO L231 Difference]: Finished difference. Result has 120 places, 133 transitions, 1448 flow [2024-06-21 15:43:59,840 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1252, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1448, PETRI_PLACES=120, PETRI_TRANSITIONS=133} [2024-06-21 15:43:59,841 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 80 predicate places. [2024-06-21 15:43:59,841 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 133 transitions, 1448 flow [2024-06-21 15:43:59,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:59,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:43:59,841 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:43:59,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 15:43:59,841 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:43:59,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:43:59,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1140595191, now seen corresponding path program 2 times [2024-06-21 15:43:59,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:43:59,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353572636] [2024-06-21 15:43:59,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:43:59,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:43:59,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:43:59,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:43:59,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:43:59,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353572636] [2024-06-21 15:43:59,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353572636] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:43:59,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:43:59,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:43:59,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381272868] [2024-06-21 15:43:59,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:43:59,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:43:59,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:43:59,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:43:59,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:43:59,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 15:43:59,973 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 133 transitions, 1448 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:59,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:43:59,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 15:43:59,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:00,401 INFO L124 PetriNetUnfolderBase]: 2069/3581 cut-off events. [2024-06-21 15:44:00,402 INFO L125 PetriNetUnfolderBase]: For 80954/80968 co-relation queries the response was YES. [2024-06-21 15:44:00,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20686 conditions, 3581 events. 2069/3581 cut-off events. For 80954/80968 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 23151 event pairs, 738 based on Foata normal form. 50/3630 useless extension candidates. Maximal degree in co-relation 20629. Up to 2374 conditions per place. [2024-06-21 15:44:00,428 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 135 selfloop transitions, 49 changer transitions 0/191 dead transitions. [2024-06-21 15:44:00,429 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 191 transitions, 2262 flow [2024-06-21 15:44:00,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 15:44:00,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 15:44:00,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 251 transitions. [2024-06-21 15:44:00,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6435897435897436 [2024-06-21 15:44:00,430 INFO L175 Difference]: Start difference. First operand has 120 places, 133 transitions, 1448 flow. Second operand 10 states and 251 transitions. [2024-06-21 15:44:00,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 191 transitions, 2262 flow [2024-06-21 15:44:00,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 191 transitions, 2154 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-21 15:44:00,505 INFO L231 Difference]: Finished difference. Result has 126 places, 135 transitions, 1513 flow [2024-06-21 15:44:00,506 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1340, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1513, PETRI_PLACES=126, PETRI_TRANSITIONS=135} [2024-06-21 15:44:00,507 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 86 predicate places. [2024-06-21 15:44:00,507 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 135 transitions, 1513 flow [2024-06-21 15:44:00,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:00,507 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:00,508 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:44:00,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 15:44:00,508 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:00,508 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:00,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1140447321, now seen corresponding path program 3 times [2024-06-21 15:44:00,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:00,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038717353] [2024-06-21 15:44:00,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:00,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:00,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:00,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:00,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:00,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038717353] [2024-06-21 15:44:00,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038717353] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:00,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:00,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:44:00,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925002646] [2024-06-21 15:44:00,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:00,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:44:00,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:00,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:44:00,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:44:00,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 15:44:00,623 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 135 transitions, 1513 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:00,623 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:00,623 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 15:44:00,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:01,034 INFO L124 PetriNetUnfolderBase]: 2142/3706 cut-off events. [2024-06-21 15:44:01,034 INFO L125 PetriNetUnfolderBase]: For 86523/86537 co-relation queries the response was YES. [2024-06-21 15:44:01,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20994 conditions, 3706 events. 2142/3706 cut-off events. For 86523/86537 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 24220 event pairs, 829 based on Foata normal form. 56/3753 useless extension candidates. Maximal degree in co-relation 20935. Up to 2945 conditions per place. [2024-06-21 15:44:01,063 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 124 selfloop transitions, 49 changer transitions 0/180 dead transitions. [2024-06-21 15:44:01,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 180 transitions, 2127 flow [2024-06-21 15:44:01,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 15:44:01,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 15:44:01,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 241 transitions. [2024-06-21 15:44:01,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.617948717948718 [2024-06-21 15:44:01,065 INFO L175 Difference]: Start difference. First operand has 126 places, 135 transitions, 1513 flow. Second operand 10 states and 241 transitions. [2024-06-21 15:44:01,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 180 transitions, 2127 flow [2024-06-21 15:44:01,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 180 transitions, 2004 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-21 15:44:01,137 INFO L231 Difference]: Finished difference. Result has 129 places, 136 transitions, 1534 flow [2024-06-21 15:44:01,137 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1390, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1534, PETRI_PLACES=129, PETRI_TRANSITIONS=136} [2024-06-21 15:44:01,137 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 89 predicate places. [2024-06-21 15:44:01,137 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 136 transitions, 1534 flow [2024-06-21 15:44:01,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:01,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:01,138 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:44:01,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 15:44:01,138 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:01,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:01,138 INFO L85 PathProgramCache]: Analyzing trace with hash 1233958013, now seen corresponding path program 1 times [2024-06-21 15:44:01,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:01,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698395721] [2024-06-21 15:44:01,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:01,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:01,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:01,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:01,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:01,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698395721] [2024-06-21 15:44:01,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698395721] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:01,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:01,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:44:01,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810521746] [2024-06-21 15:44:01,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:01,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:44:01,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:01,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:44:01,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:44:01,223 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 15:44:01,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 136 transitions, 1534 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:01,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:01,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 15:44:01,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:01,553 INFO L124 PetriNetUnfolderBase]: 2147/3723 cut-off events. [2024-06-21 15:44:01,553 INFO L125 PetriNetUnfolderBase]: For 77161/77169 co-relation queries the response was YES. [2024-06-21 15:44:01,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21118 conditions, 3723 events. 2147/3723 cut-off events. For 77161/77169 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 24314 event pairs, 853 based on Foata normal form. 9/3731 useless extension candidates. Maximal degree in co-relation 21058. Up to 3375 conditions per place. [2024-06-21 15:44:01,581 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 139 selfloop transitions, 19 changer transitions 0/165 dead transitions. [2024-06-21 15:44:01,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 165 transitions, 2106 flow [2024-06-21 15:44:01,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:44:01,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:44:01,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 156 transitions. [2024-06-21 15:44:01,582 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-21 15:44:01,582 INFO L175 Difference]: Start difference. First operand has 129 places, 136 transitions, 1534 flow. Second operand 7 states and 156 transitions. [2024-06-21 15:44:01,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 165 transitions, 2106 flow [2024-06-21 15:44:01,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 165 transitions, 1964 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-21 15:44:01,716 INFO L231 Difference]: Finished difference. Result has 129 places, 146 transitions, 1614 flow [2024-06-21 15:44:01,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1410, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1614, PETRI_PLACES=129, PETRI_TRANSITIONS=146} [2024-06-21 15:44:01,717 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 89 predicate places. [2024-06-21 15:44:01,717 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 146 transitions, 1614 flow [2024-06-21 15:44:01,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:01,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:01,717 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:44:01,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 15:44:01,718 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:01,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:01,718 INFO L85 PathProgramCache]: Analyzing trace with hash -1056021391, now seen corresponding path program 4 times [2024-06-21 15:44:01,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:01,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845039766] [2024-06-21 15:44:01,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:01,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:01,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:01,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:01,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:01,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845039766] [2024-06-21 15:44:01,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845039766] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:01,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:01,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:44:01,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041777403] [2024-06-21 15:44:01,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:01,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:44:01,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:01,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:44:01,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:44:01,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 15:44:01,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 146 transitions, 1614 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:01,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:01,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 15:44:01,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:02,397 INFO L124 PetriNetUnfolderBase]: 2281/3951 cut-off events. [2024-06-21 15:44:02,398 INFO L125 PetriNetUnfolderBase]: For 96503/96517 co-relation queries the response was YES. [2024-06-21 15:44:02,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22026 conditions, 3951 events. 2281/3951 cut-off events. For 96503/96517 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 26043 event pairs, 908 based on Foata normal form. 56/4006 useless extension candidates. Maximal degree in co-relation 21964. Up to 3264 conditions per place. [2024-06-21 15:44:02,422 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 124 selfloop transitions, 51 changer transitions 3/185 dead transitions. [2024-06-21 15:44:02,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 185 transitions, 2174 flow [2024-06-21 15:44:02,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 15:44:02,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 15:44:02,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 219 transitions. [2024-06-21 15:44:02,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6239316239316239 [2024-06-21 15:44:02,425 INFO L175 Difference]: Start difference. First operand has 129 places, 146 transitions, 1614 flow. Second operand 9 states and 219 transitions. [2024-06-21 15:44:02,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 185 transitions, 2174 flow [2024-06-21 15:44:02,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 185 transitions, 2147 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-21 15:44:02,505 INFO L231 Difference]: Finished difference. Result has 136 places, 146 transitions, 1724 flow [2024-06-21 15:44:02,505 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1587, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1724, PETRI_PLACES=136, PETRI_TRANSITIONS=146} [2024-06-21 15:44:02,506 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 96 predicate places. [2024-06-21 15:44:02,506 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 146 transitions, 1724 flow [2024-06-21 15:44:02,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:02,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:02,506 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:44:02,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 15:44:02,506 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:02,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:02,507 INFO L85 PathProgramCache]: Analyzing trace with hash 654581351, now seen corresponding path program 5 times [2024-06-21 15:44:02,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:02,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007520277] [2024-06-21 15:44:02,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:02,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:02,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:02,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:02,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:02,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007520277] [2024-06-21 15:44:02,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007520277] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:02,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:02,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:44:02,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581709934] [2024-06-21 15:44:02,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:02,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:44:02,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:02,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:44:02,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:44:02,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 15:44:02,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 146 transitions, 1724 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:02,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:02,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 15:44:02,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:03,214 INFO L124 PetriNetUnfolderBase]: 2405/4165 cut-off events. [2024-06-21 15:44:03,214 INFO L125 PetriNetUnfolderBase]: For 107369/107383 co-relation queries the response was YES. [2024-06-21 15:44:03,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23292 conditions, 4165 events. 2405/4165 cut-off events. For 107369/107383 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 27803 event pairs, 955 based on Foata normal form. 56/4216 useless extension candidates. Maximal degree in co-relation 23228. Up to 3434 conditions per place. [2024-06-21 15:44:03,327 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 127 selfloop transitions, 46 changer transitions 0/180 dead transitions. [2024-06-21 15:44:03,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 180 transitions, 2266 flow [2024-06-21 15:44:03,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:44:03,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:44:03,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-21 15:44:03,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.652014652014652 [2024-06-21 15:44:03,330 INFO L175 Difference]: Start difference. First operand has 136 places, 146 transitions, 1724 flow. Second operand 7 states and 178 transitions. [2024-06-21 15:44:03,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 180 transitions, 2266 flow [2024-06-21 15:44:03,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 180 transitions, 2135 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-21 15:44:03,409 INFO L231 Difference]: Finished difference. Result has 136 places, 147 transitions, 1735 flow [2024-06-21 15:44:03,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1593, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1735, PETRI_PLACES=136, PETRI_TRANSITIONS=147} [2024-06-21 15:44:03,412 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 96 predicate places. [2024-06-21 15:44:03,412 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 147 transitions, 1735 flow [2024-06-21 15:44:03,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:03,412 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:03,412 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:44:03,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 15:44:03,415 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:03,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:03,428 INFO L85 PathProgramCache]: Analyzing trace with hash 654433481, now seen corresponding path program 6 times [2024-06-21 15:44:03,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:03,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652139976] [2024-06-21 15:44:03,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:03,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:03,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:03,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:03,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:03,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652139976] [2024-06-21 15:44:03,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652139976] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:03,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:03,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:44:03,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855010207] [2024-06-21 15:44:03,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:03,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:44:03,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:03,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:44:03,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:44:03,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 15:44:03,559 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 147 transitions, 1735 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:03,559 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:03,559 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 15:44:03,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:04,138 INFO L124 PetriNetUnfolderBase]: 2475/4331 cut-off events. [2024-06-21 15:44:04,138 INFO L125 PetriNetUnfolderBase]: For 106436/106450 co-relation queries the response was YES. [2024-06-21 15:44:04,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23412 conditions, 4331 events. 2475/4331 cut-off events. For 106436/106450 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 29459 event pairs, 851 based on Foata normal form. 50/4380 useless extension candidates. Maximal degree in co-relation 23347. Up to 2675 conditions per place. [2024-06-21 15:44:04,165 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 135 selfloop transitions, 47 changer transitions 0/189 dead transitions. [2024-06-21 15:44:04,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 189 transitions, 2413 flow [2024-06-21 15:44:04,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:44:04,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:44:04,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-21 15:44:04,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.673992673992674 [2024-06-21 15:44:04,166 INFO L175 Difference]: Start difference. First operand has 136 places, 147 transitions, 1735 flow. Second operand 7 states and 184 transitions. [2024-06-21 15:44:04,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 189 transitions, 2413 flow [2024-06-21 15:44:04,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 189 transitions, 2291 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-21 15:44:04,310 INFO L231 Difference]: Finished difference. Result has 139 places, 149 transitions, 1801 flow [2024-06-21 15:44:04,311 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1613, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1801, PETRI_PLACES=139, PETRI_TRANSITIONS=149} [2024-06-21 15:44:04,311 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 99 predicate places. [2024-06-21 15:44:04,311 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 149 transitions, 1801 flow [2024-06-21 15:44:04,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:04,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:04,312 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:44:04,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 15:44:04,312 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:04,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:04,312 INFO L85 PathProgramCache]: Analyzing trace with hash 660158933, now seen corresponding path program 1 times [2024-06-21 15:44:04,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:04,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791105374] [2024-06-21 15:44:04,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:04,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:04,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:04,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:04,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:04,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791105374] [2024-06-21 15:44:04,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791105374] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:04,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:04,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:44:04,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388474681] [2024-06-21 15:44:04,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:04,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:44:04,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:04,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:44:04,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:44:04,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 15:44:04,450 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 149 transitions, 1801 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:04,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:04,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 15:44:04,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:05,052 INFO L124 PetriNetUnfolderBase]: 2584/4522 cut-off events. [2024-06-21 15:44:05,053 INFO L125 PetriNetUnfolderBase]: For 115805/115819 co-relation queries the response was YES. [2024-06-21 15:44:05,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24395 conditions, 4522 events. 2584/4522 cut-off events. For 115805/115819 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 31118 event pairs, 910 based on Foata normal form. 50/4567 useless extension candidates. Maximal degree in co-relation 24328. Up to 3238 conditions per place. [2024-06-21 15:44:05,082 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 127 selfloop transitions, 55 changer transitions 5/194 dead transitions. [2024-06-21 15:44:05,083 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 194 transitions, 2427 flow [2024-06-21 15:44:05,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 15:44:05,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 15:44:05,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 224 transitions. [2024-06-21 15:44:05,084 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6381766381766382 [2024-06-21 15:44:05,084 INFO L175 Difference]: Start difference. First operand has 139 places, 149 transitions, 1801 flow. Second operand 9 states and 224 transitions. [2024-06-21 15:44:05,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 194 transitions, 2427 flow [2024-06-21 15:44:05,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 194 transitions, 2282 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-21 15:44:05,207 INFO L231 Difference]: Finished difference. Result has 143 places, 148 transitions, 1793 flow [2024-06-21 15:44:05,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1656, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1793, PETRI_PLACES=143, PETRI_TRANSITIONS=148} [2024-06-21 15:44:05,208 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 103 predicate places. [2024-06-21 15:44:05,208 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 148 transitions, 1793 flow [2024-06-21 15:44:05,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:05,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:05,208 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:44:05,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 15:44:05,208 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:05,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:05,209 INFO L85 PathProgramCache]: Analyzing trace with hash 1270899473, now seen corresponding path program 2 times [2024-06-21 15:44:05,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:05,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191553136] [2024-06-21 15:44:05,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:05,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:05,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:05,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:05,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:05,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191553136] [2024-06-21 15:44:05,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191553136] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:05,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:05,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:44:05,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421062447] [2024-06-21 15:44:05,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:05,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:44:05,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:05,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:44:05,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:44:05,385 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 15:44:05,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 148 transitions, 1793 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:05,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:05,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 15:44:05,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:05,766 INFO L124 PetriNetUnfolderBase]: 2407/4219 cut-off events. [2024-06-21 15:44:05,766 INFO L125 PetriNetUnfolderBase]: For 102126/102128 co-relation queries the response was YES. [2024-06-21 15:44:05,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23137 conditions, 4219 events. 2407/4219 cut-off events. For 102126/102128 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 28514 event pairs, 992 based on Foata normal form. 1/4218 useless extension candidates. Maximal degree in co-relation 23069. Up to 3849 conditions per place. [2024-06-21 15:44:05,799 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 133 selfloop transitions, 18 changer transitions 0/158 dead transitions. [2024-06-21 15:44:05,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 158 transitions, 2124 flow [2024-06-21 15:44:05,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:44:05,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:44:05,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 115 transitions. [2024-06-21 15:44:05,801 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5897435897435898 [2024-06-21 15:44:05,801 INFO L175 Difference]: Start difference. First operand has 143 places, 148 transitions, 1793 flow. Second operand 5 states and 115 transitions. [2024-06-21 15:44:05,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 158 transitions, 2124 flow [2024-06-21 15:44:05,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 158 transitions, 1974 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-21 15:44:05,974 INFO L231 Difference]: Finished difference. Result has 141 places, 148 transitions, 1685 flow [2024-06-21 15:44:05,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1643, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1685, PETRI_PLACES=141, PETRI_TRANSITIONS=148} [2024-06-21 15:44:05,975 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 101 predicate places. [2024-06-21 15:44:05,975 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 148 transitions, 1685 flow [2024-06-21 15:44:05,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:05,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:05,975 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:44:05,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 15:44:05,975 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:05,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:05,976 INFO L85 PathProgramCache]: Analyzing trace with hash 101075059, now seen corresponding path program 7 times [2024-06-21 15:44:05,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:05,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182575015] [2024-06-21 15:44:05,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:05,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:05,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:06,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:06,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:06,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182575015] [2024-06-21 15:44:06,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182575015] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:06,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:06,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:44:06,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91276103] [2024-06-21 15:44:06,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:06,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:44:06,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:06,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:44:06,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:44:06,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 15:44:06,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 148 transitions, 1685 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:06,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:06,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 15:44:06,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:06,753 INFO L124 PetriNetUnfolderBase]: 2516/4401 cut-off events. [2024-06-21 15:44:06,753 INFO L125 PetriNetUnfolderBase]: For 126242/126256 co-relation queries the response was YES. [2024-06-21 15:44:06,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23609 conditions, 4401 events. 2516/4401 cut-off events. For 126242/126256 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 29957 event pairs, 1035 based on Foata normal form. 56/4448 useless extension candidates. Maximal degree in co-relation 23540. Up to 3637 conditions per place. [2024-06-21 15:44:06,794 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 116 selfloop transitions, 68 changer transitions 3/194 dead transitions. [2024-06-21 15:44:06,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 194 transitions, 2489 flow [2024-06-21 15:44:06,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 15:44:06,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 15:44:06,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 225 transitions. [2024-06-21 15:44:06,795 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6410256410256411 [2024-06-21 15:44:06,795 INFO L175 Difference]: Start difference. First operand has 141 places, 148 transitions, 1685 flow. Second operand 9 states and 225 transitions. [2024-06-21 15:44:06,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 194 transitions, 2489 flow [2024-06-21 15:44:06,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 194 transitions, 2453 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-21 15:44:06,977 INFO L231 Difference]: Finished difference. Result has 146 places, 148 transitions, 1835 flow [2024-06-21 15:44:06,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1649, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1835, PETRI_PLACES=146, PETRI_TRANSITIONS=148} [2024-06-21 15:44:06,978 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 106 predicate places. [2024-06-21 15:44:06,978 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 148 transitions, 1835 flow [2024-06-21 15:44:06,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:06,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:06,978 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:44:06,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 15:44:06,979 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:06,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:06,980 INFO L85 PathProgramCache]: Analyzing trace with hash -118417609, now seen corresponding path program 2 times [2024-06-21 15:44:06,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:06,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143427859] [2024-06-21 15:44:06,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:06,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:06,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:07,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:07,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:07,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143427859] [2024-06-21 15:44:07,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143427859] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:07,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:07,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:44:07,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156220247] [2024-06-21 15:44:07,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:07,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:44:07,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:07,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:44:07,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:44:07,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 15:44:07,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 148 transitions, 1835 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:07,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:07,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 15:44:07,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:07,725 INFO L124 PetriNetUnfolderBase]: 2615/4600 cut-off events. [2024-06-21 15:44:07,725 INFO L125 PetriNetUnfolderBase]: For 134900/134914 co-relation queries the response was YES. [2024-06-21 15:44:07,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24894 conditions, 4600 events. 2615/4600 cut-off events. For 134900/134914 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 31845 event pairs, 1035 based on Foata normal form. 50/4641 useless extension candidates. Maximal degree in co-relation 24824. Up to 3573 conditions per place. [2024-06-21 15:44:07,761 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 121 selfloop transitions, 70 changer transitions 6/204 dead transitions. [2024-06-21 15:44:07,761 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 204 transitions, 2715 flow [2024-06-21 15:44:07,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 15:44:07,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 15:44:07,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 250 transitions. [2024-06-21 15:44:07,762 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6410256410256411 [2024-06-21 15:44:07,762 INFO L175 Difference]: Start difference. First operand has 146 places, 148 transitions, 1835 flow. Second operand 10 states and 250 transitions. [2024-06-21 15:44:07,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 204 transitions, 2715 flow [2024-06-21 15:44:07,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 204 transitions, 2542 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-21 15:44:07,887 INFO L231 Difference]: Finished difference. Result has 149 places, 148 transitions, 1849 flow [2024-06-21 15:44:07,887 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1662, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1849, PETRI_PLACES=149, PETRI_TRANSITIONS=148} [2024-06-21 15:44:07,887 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 109 predicate places. [2024-06-21 15:44:07,887 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 148 transitions, 1849 flow [2024-06-21 15:44:07,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:07,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:07,888 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:44:07,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 15:44:07,888 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:07,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:07,888 INFO L85 PathProgramCache]: Analyzing trace with hash 147279671, now seen corresponding path program 3 times [2024-06-21 15:44:07,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:07,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117961645] [2024-06-21 15:44:07,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:07,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:07,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:07,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:07,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:07,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117961645] [2024-06-21 15:44:07,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117961645] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:07,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:07,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:44:07,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865614657] [2024-06-21 15:44:07,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:07,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:44:07,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:07,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:44:07,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:44:08,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 15:44:08,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 148 transitions, 1849 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:08,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:08,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 15:44:08,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:08,558 INFO L124 PetriNetUnfolderBase]: 2760/4829 cut-off events. [2024-06-21 15:44:08,559 INFO L125 PetriNetUnfolderBase]: For 148404/148418 co-relation queries the response was YES. [2024-06-21 15:44:08,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25987 conditions, 4829 events. 2760/4829 cut-off events. For 148404/148418 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 33660 event pairs, 1000 based on Foata normal form. 50/4868 useless extension candidates. Maximal degree in co-relation 25916. Up to 2795 conditions per place. [2024-06-21 15:44:08,599 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 113 selfloop transitions, 75 changer transitions 8/203 dead transitions. [2024-06-21 15:44:08,599 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 203 transitions, 2711 flow [2024-06-21 15:44:08,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 15:44:08,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 15:44:08,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 232 transitions. [2024-06-21 15:44:08,600 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6609686609686609 [2024-06-21 15:44:08,601 INFO L175 Difference]: Start difference. First operand has 149 places, 148 transitions, 1849 flow. Second operand 9 states and 232 transitions. [2024-06-21 15:44:08,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 203 transitions, 2711 flow [2024-06-21 15:44:08,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 203 transitions, 2531 flow, removed 21 selfloop flow, removed 8 redundant places. [2024-06-21 15:44:08,753 INFO L231 Difference]: Finished difference. Result has 149 places, 145 transitions, 1732 flow [2024-06-21 15:44:08,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1613, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1732, PETRI_PLACES=149, PETRI_TRANSITIONS=145} [2024-06-21 15:44:08,754 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 109 predicate places. [2024-06-21 15:44:08,754 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 145 transitions, 1732 flow [2024-06-21 15:44:08,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:08,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:08,754 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:44:08,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 15:44:08,754 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:08,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:08,755 INFO L85 PathProgramCache]: Analyzing trace with hash -177938721, now seen corresponding path program 3 times [2024-06-21 15:44:08,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:08,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559035691] [2024-06-21 15:44:08,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:08,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:08,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:08,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:08,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:08,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559035691] [2024-06-21 15:44:08,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559035691] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:08,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:08,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:44:08,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407358900] [2024-06-21 15:44:08,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:08,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:44:08,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:08,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:44:08,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:44:08,838 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 15:44:08,838 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 145 transitions, 1732 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:08,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:08,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 15:44:08,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:09,231 INFO L124 PetriNetUnfolderBase]: 2484/4367 cut-off events. [2024-06-21 15:44:09,232 INFO L125 PetriNetUnfolderBase]: For 133040/133042 co-relation queries the response was YES. [2024-06-21 15:44:09,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24297 conditions, 4367 events. 2484/4367 cut-off events. For 133040/133042 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 29872 event pairs, 1053 based on Foata normal form. 1/4366 useless extension candidates. Maximal degree in co-relation 24225. Up to 3987 conditions per place. [2024-06-21 15:44:09,268 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 131 selfloop transitions, 23 changer transitions 0/161 dead transitions. [2024-06-21 15:44:09,268 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 161 transitions, 2128 flow [2024-06-21 15:44:09,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:44:09,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:44:09,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 132 transitions. [2024-06-21 15:44:09,269 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5641025641025641 [2024-06-21 15:44:09,269 INFO L175 Difference]: Start difference. First operand has 149 places, 145 transitions, 1732 flow. Second operand 6 states and 132 transitions. [2024-06-21 15:44:09,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 161 transitions, 2128 flow [2024-06-21 15:44:09,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 161 transitions, 1920 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-21 15:44:09,388 INFO L231 Difference]: Finished difference. Result has 149 places, 150 transitions, 1647 flow [2024-06-21 15:44:09,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1532, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1647, PETRI_PLACES=149, PETRI_TRANSITIONS=150} [2024-06-21 15:44:09,388 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 109 predicate places. [2024-06-21 15:44:09,389 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 150 transitions, 1647 flow [2024-06-21 15:44:09,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:09,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:09,389 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:44:09,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 15:44:09,389 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:09,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:09,389 INFO L85 PathProgramCache]: Analyzing trace with hash -392739824, now seen corresponding path program 1 times [2024-06-21 15:44:09,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:09,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124805371] [2024-06-21 15:44:09,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:09,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:09,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:09,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:09,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:09,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124805371] [2024-06-21 15:44:09,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124805371] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:09,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:09,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:44:09,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327540331] [2024-06-21 15:44:09,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:09,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:44:09,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:09,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:44:09,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:44:09,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 39 [2024-06-21 15:44:09,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 150 transitions, 1647 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:09,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:09,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 39 [2024-06-21 15:44:09,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:09,949 INFO L124 PetriNetUnfolderBase]: 2333/4143 cut-off events. [2024-06-21 15:44:09,949 INFO L125 PetriNetUnfolderBase]: For 126659/126666 co-relation queries the response was YES. [2024-06-21 15:44:09,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22247 conditions, 4143 events. 2333/4143 cut-off events. For 126659/126666 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 28394 event pairs, 926 based on Foata normal form. 17/4139 useless extension candidates. Maximal degree in co-relation 22173. Up to 3620 conditions per place. [2024-06-21 15:44:09,987 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 123 selfloop transitions, 29 changer transitions 0/169 dead transitions. [2024-06-21 15:44:09,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 169 transitions, 2043 flow [2024-06-21 15:44:09,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:44:09,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:44:09,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-21 15:44:09,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2024-06-21 15:44:09,989 INFO L175 Difference]: Start difference. First operand has 149 places, 150 transitions, 1647 flow. Second operand 6 states and 143 transitions. [2024-06-21 15:44:09,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 169 transitions, 2043 flow [2024-06-21 15:44:10,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 169 transitions, 1979 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-21 15:44:10,122 INFO L231 Difference]: Finished difference. Result has 152 places, 152 transitions, 1693 flow [2024-06-21 15:44:10,122 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1583, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1693, PETRI_PLACES=152, PETRI_TRANSITIONS=152} [2024-06-21 15:44:10,122 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 112 predicate places. [2024-06-21 15:44:10,122 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 152 transitions, 1693 flow [2024-06-21 15:44:10,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:10,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:10,123 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:44:10,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 15:44:10,123 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:10,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:10,124 INFO L85 PathProgramCache]: Analyzing trace with hash 653020910, now seen corresponding path program 2 times [2024-06-21 15:44:10,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:10,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704365037] [2024-06-21 15:44:10,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:10,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:10,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:10,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:10,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:10,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704365037] [2024-06-21 15:44:10,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704365037] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:10,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:10,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:44:10,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324219574] [2024-06-21 15:44:10,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:10,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:44:10,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:10,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:44:10,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:44:10,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 39 [2024-06-21 15:44:10,222 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 152 transitions, 1693 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:10,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:10,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 39 [2024-06-21 15:44:10,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:10,720 INFO L124 PetriNetUnfolderBase]: 2373/4200 cut-off events. [2024-06-21 15:44:10,720 INFO L125 PetriNetUnfolderBase]: For 134565/134572 co-relation queries the response was YES. [2024-06-21 15:44:10,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22963 conditions, 4200 events. 2373/4200 cut-off events. For 134565/134572 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 28767 event pairs, 977 based on Foata normal form. 17/4194 useless extension candidates. Maximal degree in co-relation 22888. Up to 3702 conditions per place. [2024-06-21 15:44:10,759 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 114 selfloop transitions, 39 changer transitions 0/170 dead transitions. [2024-06-21 15:44:10,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 170 transitions, 2231 flow [2024-06-21 15:44:10,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:44:10,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:44:10,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-21 15:44:10,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2024-06-21 15:44:10,760 INFO L175 Difference]: Start difference. First operand has 152 places, 152 transitions, 1693 flow. Second operand 6 states and 143 transitions. [2024-06-21 15:44:10,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 170 transitions, 2231 flow [2024-06-21 15:44:10,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 170 transitions, 2157 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-21 15:44:10,906 INFO L231 Difference]: Finished difference. Result has 154 places, 154 transitions, 1748 flow [2024-06-21 15:44:10,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1619, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1748, PETRI_PLACES=154, PETRI_TRANSITIONS=154} [2024-06-21 15:44:10,906 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 114 predicate places. [2024-06-21 15:44:10,907 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 154 transitions, 1748 flow [2024-06-21 15:44:10,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:10,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:10,907 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:44:10,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 15:44:10,907 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:10,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:10,908 INFO L85 PathProgramCache]: Analyzing trace with hash 666353390, now seen corresponding path program 3 times [2024-06-21 15:44:10,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:10,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649624537] [2024-06-21 15:44:10,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:10,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:10,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:11,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:11,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:11,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649624537] [2024-06-21 15:44:11,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649624537] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:11,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:11,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:44:11,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389208696] [2024-06-21 15:44:11,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:11,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:44:11,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:11,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:44:11,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:44:11,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 39 [2024-06-21 15:44:11,051 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 154 transitions, 1748 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:11,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:11,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 39 [2024-06-21 15:44:11,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:11,549 INFO L124 PetriNetUnfolderBase]: 2438/4301 cut-off events. [2024-06-21 15:44:11,549 INFO L125 PetriNetUnfolderBase]: For 144931/144938 co-relation queries the response was YES. [2024-06-21 15:44:11,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23775 conditions, 4301 events. 2438/4301 cut-off events. For 144931/144938 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 29532 event pairs, 944 based on Foata normal form. 17/4295 useless extension candidates. Maximal degree in co-relation 23699. Up to 3605 conditions per place. [2024-06-21 15:44:11,588 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 117 selfloop transitions, 44 changer transitions 0/178 dead transitions. [2024-06-21 15:44:11,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 178 transitions, 2424 flow [2024-06-21 15:44:11,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:44:11,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:44:11,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-21 15:44:11,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6324786324786325 [2024-06-21 15:44:11,589 INFO L175 Difference]: Start difference. First operand has 154 places, 154 transitions, 1748 flow. Second operand 6 states and 148 transitions. [2024-06-21 15:44:11,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 178 transitions, 2424 flow [2024-06-21 15:44:11,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 178 transitions, 2319 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-21 15:44:11,717 INFO L231 Difference]: Finished difference. Result has 156 places, 157 transitions, 1800 flow [2024-06-21 15:44:11,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1643, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1800, PETRI_PLACES=156, PETRI_TRANSITIONS=157} [2024-06-21 15:44:11,717 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 116 predicate places. [2024-06-21 15:44:11,717 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 157 transitions, 1800 flow [2024-06-21 15:44:11,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:11,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:11,718 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:44:11,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 15:44:11,718 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:11,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:11,718 INFO L85 PathProgramCache]: Analyzing trace with hash 417001180, now seen corresponding path program 1 times [2024-06-21 15:44:11,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:11,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447207679] [2024-06-21 15:44:11,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:11,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:11,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:11,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:11,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:11,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447207679] [2024-06-21 15:44:11,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447207679] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:11,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:11,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:44:11,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292502991] [2024-06-21 15:44:11,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:11,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:44:11,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:11,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:44:11,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:44:11,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 15:44:11,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 157 transitions, 1800 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:11,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:11,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 15:44:11,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:12,367 INFO L124 PetriNetUnfolderBase]: 2511/4408 cut-off events. [2024-06-21 15:44:12,368 INFO L125 PetriNetUnfolderBase]: For 145782/145794 co-relation queries the response was YES. [2024-06-21 15:44:12,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24514 conditions, 4408 events. 2511/4408 cut-off events. For 145782/145794 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 30142 event pairs, 1011 based on Foata normal form. 14/4421 useless extension candidates. Maximal degree in co-relation 24437. Up to 3889 conditions per place. [2024-06-21 15:44:12,408 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 130 selfloop transitions, 55 changer transitions 1/193 dead transitions. [2024-06-21 15:44:12,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 193 transitions, 2428 flow [2024-06-21 15:44:12,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 15:44:12,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 15:44:12,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 214 transitions. [2024-06-21 15:44:12,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6096866096866097 [2024-06-21 15:44:12,410 INFO L175 Difference]: Start difference. First operand has 156 places, 157 transitions, 1800 flow. Second operand 9 states and 214 transitions. [2024-06-21 15:44:12,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 193 transitions, 2428 flow [2024-06-21 15:44:12,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 193 transitions, 2347 flow, removed 19 selfloop flow, removed 2 redundant places. [2024-06-21 15:44:12,543 INFO L231 Difference]: Finished difference. Result has 163 places, 159 transitions, 1856 flow [2024-06-21 15:44:12,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1719, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1856, PETRI_PLACES=163, PETRI_TRANSITIONS=159} [2024-06-21 15:44:12,543 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 123 predicate places. [2024-06-21 15:44:12,544 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 159 transitions, 1856 flow [2024-06-21 15:44:12,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:12,544 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:12,544 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:44:12,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 15:44:12,544 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:12,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:12,545 INFO L85 PathProgramCache]: Analyzing trace with hash 422715100, now seen corresponding path program 2 times [2024-06-21 15:44:12,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:12,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036374056] [2024-06-21 15:44:12,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:12,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:12,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:12,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:12,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:12,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036374056] [2024-06-21 15:44:12,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036374056] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:12,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:12,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:44:12,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194919879] [2024-06-21 15:44:12,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:12,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:44:12,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:12,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:44:12,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:44:12,650 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 15:44:12,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 159 transitions, 1856 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:12,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:12,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 15:44:12,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:13,185 INFO L124 PetriNetUnfolderBase]: 2530/4439 cut-off events. [2024-06-21 15:44:13,186 INFO L125 PetriNetUnfolderBase]: For 153187/153199 co-relation queries the response was YES. [2024-06-21 15:44:13,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24995 conditions, 4439 events. 2530/4439 cut-off events. For 153187/153199 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 30362 event pairs, 1011 based on Foata normal form. 13/4451 useless extension candidates. Maximal degree in co-relation 24916. Up to 3908 conditions per place. [2024-06-21 15:44:13,218 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 123 selfloop transitions, 61 changer transitions 1/192 dead transitions. [2024-06-21 15:44:13,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 192 transitions, 2540 flow [2024-06-21 15:44:13,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:44:13,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:44:13,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-21 15:44:13,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6057692307692307 [2024-06-21 15:44:13,219 INFO L175 Difference]: Start difference. First operand has 163 places, 159 transitions, 1856 flow. Second operand 8 states and 189 transitions. [2024-06-21 15:44:13,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 192 transitions, 2540 flow [2024-06-21 15:44:13,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 192 transitions, 2434 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-21 15:44:13,382 INFO L231 Difference]: Finished difference. Result has 166 places, 165 transitions, 1985 flow [2024-06-21 15:44:13,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1758, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1985, PETRI_PLACES=166, PETRI_TRANSITIONS=165} [2024-06-21 15:44:13,382 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 126 predicate places. [2024-06-21 15:44:13,382 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 165 transitions, 1985 flow [2024-06-21 15:44:13,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:13,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:13,383 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:44:13,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 15:44:13,383 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:13,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:13,383 INFO L85 PathProgramCache]: Analyzing trace with hash 414141244, now seen corresponding path program 1 times [2024-06-21 15:44:13,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:13,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622559523] [2024-06-21 15:44:13,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:13,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:13,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:13,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:13,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:13,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622559523] [2024-06-21 15:44:13,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622559523] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:13,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:13,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:44:13,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547362793] [2024-06-21 15:44:13,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:13,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:44:13,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:13,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:44:13,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:44:13,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 15:44:13,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 165 transitions, 1985 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:13,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:13,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 15:44:13,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:14,055 INFO L124 PetriNetUnfolderBase]: 2548/4467 cut-off events. [2024-06-21 15:44:14,056 INFO L125 PetriNetUnfolderBase]: For 164547/164555 co-relation queries the response was YES. [2024-06-21 15:44:14,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25352 conditions, 4467 events. 2548/4467 cut-off events. For 164547/164555 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 30450 event pairs, 910 based on Foata normal form. 14/4480 useless extension candidates. Maximal degree in co-relation 25271. Up to 3976 conditions per place. [2024-06-21 15:44:14,095 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 166 selfloop transitions, 23 changer transitions 0/196 dead transitions. [2024-06-21 15:44:14,096 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 196 transitions, 2549 flow [2024-06-21 15:44:14,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:44:14,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:44:14,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2024-06-21 15:44:14,097 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5769230769230769 [2024-06-21 15:44:14,097 INFO L175 Difference]: Start difference. First operand has 166 places, 165 transitions, 1985 flow. Second operand 8 states and 180 transitions. [2024-06-21 15:44:14,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 196 transitions, 2549 flow [2024-06-21 15:44:14,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 196 transitions, 2464 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-21 15:44:14,273 INFO L231 Difference]: Finished difference. Result has 170 places, 166 transitions, 1959 flow [2024-06-21 15:44:14,273 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1900, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1959, PETRI_PLACES=170, PETRI_TRANSITIONS=166} [2024-06-21 15:44:14,273 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 130 predicate places. [2024-06-21 15:44:14,273 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 166 transitions, 1959 flow [2024-06-21 15:44:14,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:14,274 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:14,275 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:44:14,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 15:44:14,275 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:14,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:14,275 INFO L85 PathProgramCache]: Analyzing trace with hash 414380254, now seen corresponding path program 2 times [2024-06-21 15:44:14,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:14,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242050404] [2024-06-21 15:44:14,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:14,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:14,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:14,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:14,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:14,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242050404] [2024-06-21 15:44:14,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242050404] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:14,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:14,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:44:14,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431139558] [2024-06-21 15:44:14,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:14,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:44:14,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:14,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:44:14,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:44:14,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 15:44:14,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 166 transitions, 1959 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:14,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:14,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 15:44:14,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:14,874 INFO L124 PetriNetUnfolderBase]: 2576/4511 cut-off events. [2024-06-21 15:44:14,875 INFO L125 PetriNetUnfolderBase]: For 173851/173859 co-relation queries the response was YES. [2024-06-21 15:44:14,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25661 conditions, 4511 events. 2576/4511 cut-off events. For 173851/173859 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 30823 event pairs, 1004 based on Foata normal form. 16/4526 useless extension candidates. Maximal degree in co-relation 25579. Up to 4096 conditions per place. [2024-06-21 15:44:14,913 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 163 selfloop transitions, 20 changer transitions 0/190 dead transitions. [2024-06-21 15:44:14,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 190 transitions, 2411 flow [2024-06-21 15:44:14,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:44:14,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:44:14,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 174 transitions. [2024-06-21 15:44:14,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5576923076923077 [2024-06-21 15:44:14,914 INFO L175 Difference]: Start difference. First operand has 170 places, 166 transitions, 1959 flow. Second operand 8 states and 174 transitions. [2024-06-21 15:44:14,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 190 transitions, 2411 flow [2024-06-21 15:44:15,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 190 transitions, 2372 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-21 15:44:15,109 INFO L231 Difference]: Finished difference. Result has 173 places, 167 transitions, 1978 flow [2024-06-21 15:44:15,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1921, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1978, PETRI_PLACES=173, PETRI_TRANSITIONS=167} [2024-06-21 15:44:15,110 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 133 predicate places. [2024-06-21 15:44:15,110 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 167 transitions, 1978 flow [2024-06-21 15:44:15,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:15,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:15,110 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:44:15,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 15:44:15,110 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:15,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:15,111 INFO L85 PathProgramCache]: Analyzing trace with hash 532292350, now seen corresponding path program 3 times [2024-06-21 15:44:15,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:15,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769319555] [2024-06-21 15:44:15,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:15,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:15,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:15,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:15,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:15,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769319555] [2024-06-21 15:44:15,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769319555] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:15,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:15,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:44:15,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232138342] [2024-06-21 15:44:15,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:15,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:44:15,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:15,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:44:15,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:44:15,240 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 15:44:15,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 167 transitions, 1978 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:15,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:15,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 15:44:15,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:15,723 INFO L124 PetriNetUnfolderBase]: 2570/4505 cut-off events. [2024-06-21 15:44:15,724 INFO L125 PetriNetUnfolderBase]: For 174908/174920 co-relation queries the response was YES. [2024-06-21 15:44:15,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25704 conditions, 4505 events. 2570/4505 cut-off events. For 174908/174920 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 30833 event pairs, 1017 based on Foata normal form. 14/4518 useless extension candidates. Maximal degree in co-relation 25621. Up to 4014 conditions per place. [2024-06-21 15:44:15,763 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 132 selfloop transitions, 47 changer transitions 1/187 dead transitions. [2024-06-21 15:44:15,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 187 transitions, 2470 flow [2024-06-21 15:44:15,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:44:15,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:44:15,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-21 15:44:15,765 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6324786324786325 [2024-06-21 15:44:15,765 INFO L175 Difference]: Start difference. First operand has 173 places, 167 transitions, 1978 flow. Second operand 6 states and 148 transitions. [2024-06-21 15:44:15,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 187 transitions, 2470 flow [2024-06-21 15:44:15,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 187 transitions, 2427 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 15:44:15,972 INFO L231 Difference]: Finished difference. Result has 173 places, 166 transitions, 2029 flow [2024-06-21 15:44:15,972 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1935, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2029, PETRI_PLACES=173, PETRI_TRANSITIONS=166} [2024-06-21 15:44:15,972 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 133 predicate places. [2024-06-21 15:44:15,972 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 166 transitions, 2029 flow [2024-06-21 15:44:15,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:15,973 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:15,973 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:44:15,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 15:44:15,973 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:15,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:15,973 INFO L85 PathProgramCache]: Analyzing trace with hash 13774176, now seen corresponding path program 4 times [2024-06-21 15:44:15,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:15,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909727170] [2024-06-21 15:44:15,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:15,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:15,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:16,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:16,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:16,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909727170] [2024-06-21 15:44:16,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909727170] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:16,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:16,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:44:16,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085566697] [2024-06-21 15:44:16,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:16,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:44:16,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:16,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:44:16,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:44:16,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 15:44:16,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 166 transitions, 2029 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:16,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:16,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 15:44:16,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:16,602 INFO L124 PetriNetUnfolderBase]: 2535/4440 cut-off events. [2024-06-21 15:44:16,602 INFO L125 PetriNetUnfolderBase]: For 181059/181071 co-relation queries the response was YES. [2024-06-21 15:44:16,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25591 conditions, 4440 events. 2535/4440 cut-off events. For 181059/181071 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 30273 event pairs, 999 based on Foata normal form. 14/4453 useless extension candidates. Maximal degree in co-relation 25507. Up to 3955 conditions per place. [2024-06-21 15:44:16,674 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 130 selfloop transitions, 48 changer transitions 2/187 dead transitions. [2024-06-21 15:44:16,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 187 transitions, 2441 flow [2024-06-21 15:44:16,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:44:16,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:44:16,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 184 transitions. [2024-06-21 15:44:16,678 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5897435897435898 [2024-06-21 15:44:16,678 INFO L175 Difference]: Start difference. First operand has 173 places, 166 transitions, 2029 flow. Second operand 8 states and 184 transitions. [2024-06-21 15:44:16,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 187 transitions, 2441 flow [2024-06-21 15:44:16,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 187 transitions, 2355 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-21 15:44:16,935 INFO L231 Difference]: Finished difference. Result has 176 places, 164 transitions, 2020 flow [2024-06-21 15:44:16,935 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1943, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2020, PETRI_PLACES=176, PETRI_TRANSITIONS=164} [2024-06-21 15:44:16,936 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 136 predicate places. [2024-06-21 15:44:16,936 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 164 transitions, 2020 flow [2024-06-21 15:44:16,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:16,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:16,936 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:44:16,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 15:44:16,936 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:16,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:16,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1563719792, now seen corresponding path program 5 times [2024-06-21 15:44:16,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:16,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232927874] [2024-06-21 15:44:16,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:16,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:16,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:17,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:17,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:17,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232927874] [2024-06-21 15:44:17,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232927874] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:17,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:17,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:44:17,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081579633] [2024-06-21 15:44:17,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:17,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:44:17,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:17,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:44:17,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:44:17,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 15:44:17,050 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 164 transitions, 2020 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:17,050 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:17,050 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 15:44:17,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:17,589 INFO L124 PetriNetUnfolderBase]: 2422/4239 cut-off events. [2024-06-21 15:44:17,590 INFO L125 PetriNetUnfolderBase]: For 178902/178908 co-relation queries the response was YES. [2024-06-21 15:44:17,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24815 conditions, 4239 events. 2422/4239 cut-off events. For 178902/178908 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 28572 event pairs, 960 based on Foata normal form. 5/4242 useless extension candidates. Maximal degree in co-relation 24731. Up to 3730 conditions per place. [2024-06-21 15:44:17,624 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 112 selfloop transitions, 57 changer transitions 2/178 dead transitions. [2024-06-21 15:44:17,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 178 transitions, 2396 flow [2024-06-21 15:44:17,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:44:17,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:44:17,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 159 transitions. [2024-06-21 15:44:17,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5824175824175825 [2024-06-21 15:44:17,625 INFO L175 Difference]: Start difference. First operand has 176 places, 164 transitions, 2020 flow. Second operand 7 states and 159 transitions. [2024-06-21 15:44:17,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 178 transitions, 2396 flow [2024-06-21 15:44:17,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 178 transitions, 2215 flow, removed 4 selfloop flow, removed 11 redundant places. [2024-06-21 15:44:17,848 INFO L231 Difference]: Finished difference. Result has 172 places, 162 transitions, 1936 flow [2024-06-21 15:44:17,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1839, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1936, PETRI_PLACES=172, PETRI_TRANSITIONS=162} [2024-06-21 15:44:17,848 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 132 predicate places. [2024-06-21 15:44:17,848 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 162 transitions, 1936 flow [2024-06-21 15:44:17,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:17,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:17,849 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:44:17,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 15:44:17,849 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:17,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:17,849 INFO L85 PathProgramCache]: Analyzing trace with hash 1563716816, now seen corresponding path program 3 times [2024-06-21 15:44:17,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:17,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229941810] [2024-06-21 15:44:17,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:17,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:17,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:17,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:17,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:17,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229941810] [2024-06-21 15:44:17,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229941810] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:17,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:17,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:44:17,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94485504] [2024-06-21 15:44:17,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:17,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:44:17,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:17,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:44:17,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:44:17,965 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 15:44:17,965 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 162 transitions, 1936 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:17,965 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:17,965 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 15:44:17,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:18,477 INFO L124 PetriNetUnfolderBase]: 2321/4072 cut-off events. [2024-06-21 15:44:18,478 INFO L125 PetriNetUnfolderBase]: For 176678/176680 co-relation queries the response was YES. [2024-06-21 15:44:18,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23793 conditions, 4072 events. 2321/4072 cut-off events. For 176678/176680 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 27237 event pairs, 895 based on Foata normal form. 8/4078 useless extension candidates. Maximal degree in co-relation 23710. Up to 3666 conditions per place. [2024-06-21 15:44:18,521 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 151 selfloop transitions, 19 changer transitions 0/177 dead transitions. [2024-06-21 15:44:18,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 177 transitions, 2331 flow [2024-06-21 15:44:18,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:44:18,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:44:18,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 134 transitions. [2024-06-21 15:44:18,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5726495726495726 [2024-06-21 15:44:18,522 INFO L175 Difference]: Start difference. First operand has 172 places, 162 transitions, 1936 flow. Second operand 6 states and 134 transitions. [2024-06-21 15:44:18,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 177 transitions, 2331 flow [2024-06-21 15:44:18,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 177 transitions, 2178 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-21 15:44:18,754 INFO L231 Difference]: Finished difference. Result has 170 places, 162 transitions, 1826 flow [2024-06-21 15:44:18,754 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1783, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1826, PETRI_PLACES=170, PETRI_TRANSITIONS=162} [2024-06-21 15:44:18,755 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 130 predicate places. [2024-06-21 15:44:18,755 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 162 transitions, 1826 flow [2024-06-21 15:44:18,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:18,755 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:18,755 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:44:18,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 15:44:18,755 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:18,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:18,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1564085778, now seen corresponding path program 1 times [2024-06-21 15:44:18,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:18,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888531724] [2024-06-21 15:44:18,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:18,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:18,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:18,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:18,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:18,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888531724] [2024-06-21 15:44:18,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888531724] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:18,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:18,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:44:18,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778983662] [2024-06-21 15:44:18,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:18,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:44:18,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:18,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:44:18,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:44:18,876 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 15:44:18,877 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 162 transitions, 1826 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:18,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:18,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 15:44:18,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:19,405 INFO L124 PetriNetUnfolderBase]: 2341/4104 cut-off events. [2024-06-21 15:44:19,405 INFO L125 PetriNetUnfolderBase]: For 182460/182462 co-relation queries the response was YES. [2024-06-21 15:44:19,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23999 conditions, 4104 events. 2341/4104 cut-off events. For 182460/182462 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 27497 event pairs, 879 based on Foata normal form. 6/4108 useless extension candidates. Maximal degree in co-relation 23915. Up to 3630 conditions per place. [2024-06-21 15:44:19,445 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 154 selfloop transitions, 23 changer transitions 0/184 dead transitions. [2024-06-21 15:44:19,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 184 transitions, 2300 flow [2024-06-21 15:44:19,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:44:19,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:44:19,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 137 transitions. [2024-06-21 15:44:19,446 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5854700854700855 [2024-06-21 15:44:19,446 INFO L175 Difference]: Start difference. First operand has 170 places, 162 transitions, 1826 flow. Second operand 6 states and 137 transitions. [2024-06-21 15:44:19,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 184 transitions, 2300 flow [2024-06-21 15:44:19,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 184 transitions, 2252 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-21 15:44:19,687 INFO L231 Difference]: Finished difference. Result has 172 places, 166 transitions, 1896 flow [2024-06-21 15:44:19,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1778, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1896, PETRI_PLACES=172, PETRI_TRANSITIONS=166} [2024-06-21 15:44:19,687 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 132 predicate places. [2024-06-21 15:44:19,687 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 166 transitions, 1896 flow [2024-06-21 15:44:19,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:19,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:19,688 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:44:19,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 15:44:19,688 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:19,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:19,688 INFO L85 PathProgramCache]: Analyzing trace with hash 1820691490, now seen corresponding path program 1 times [2024-06-21 15:44:19,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:19,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581338035] [2024-06-21 15:44:19,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:19,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:19,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:19,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:19,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:19,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581338035] [2024-06-21 15:44:19,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581338035] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:19,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:19,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:44:19,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713573407] [2024-06-21 15:44:19,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:19,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:44:19,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:19,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:44:19,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:44:19,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 15:44:19,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 166 transitions, 1896 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:19,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:19,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 15:44:19,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:20,346 INFO L124 PetriNetUnfolderBase]: 2338/4101 cut-off events. [2024-06-21 15:44:20,346 INFO L125 PetriNetUnfolderBase]: For 185060/185072 co-relation queries the response was YES. [2024-06-21 15:44:20,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24234 conditions, 4101 events. 2338/4101 cut-off events. For 185060/185072 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 27496 event pairs, 903 based on Foata normal form. 13/4108 useless extension candidates. Maximal degree in co-relation 24148. Up to 3663 conditions per place. [2024-06-21 15:44:20,387 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 142 selfloop transitions, 34 changer transitions 0/183 dead transitions. [2024-06-21 15:44:20,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 183 transitions, 2378 flow [2024-06-21 15:44:20,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:44:20,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:44:20,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-06-21 15:44:20,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6025641025641025 [2024-06-21 15:44:20,389 INFO L175 Difference]: Start difference. First operand has 172 places, 166 transitions, 1896 flow. Second operand 6 states and 141 transitions. [2024-06-21 15:44:20,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 183 transitions, 2378 flow [2024-06-21 15:44:20,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 183 transitions, 2321 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-21 15:44:20,704 INFO L231 Difference]: Finished difference. Result has 175 places, 166 transitions, 1913 flow [2024-06-21 15:44:20,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1839, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1913, PETRI_PLACES=175, PETRI_TRANSITIONS=166} [2024-06-21 15:44:20,705 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 135 predicate places. [2024-06-21 15:44:20,705 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 166 transitions, 1913 flow [2024-06-21 15:44:20,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:20,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:20,705 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:44:20,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 15:44:20,706 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:20,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:20,706 INFO L85 PathProgramCache]: Analyzing trace with hash -2122860070, now seen corresponding path program 2 times [2024-06-21 15:44:20,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:20,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445816123] [2024-06-21 15:44:20,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:20,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:20,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:20,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:20,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:20,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445816123] [2024-06-21 15:44:20,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445816123] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:20,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:20,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:44:20,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785400297] [2024-06-21 15:44:20,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:20,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:44:20,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:20,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:44:20,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:44:20,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 15:44:20,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 166 transitions, 1913 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:20,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:20,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 15:44:20,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:21,359 INFO L124 PetriNetUnfolderBase]: 2335/4100 cut-off events. [2024-06-21 15:44:21,360 INFO L125 PetriNetUnfolderBase]: For 190938/190946 co-relation queries the response was YES. [2024-06-21 15:44:21,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24255 conditions, 4100 events. 2335/4100 cut-off events. For 190938/190946 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 27491 event pairs, 912 based on Foata normal form. 9/4107 useless extension candidates. Maximal degree in co-relation 24168. Up to 3660 conditions per place. [2024-06-21 15:44:21,403 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 132 selfloop transitions, 37 changer transitions 0/176 dead transitions. [2024-06-21 15:44:21,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 176 transitions, 2275 flow [2024-06-21 15:44:21,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:44:21,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:44:21,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 135 transitions. [2024-06-21 15:44:21,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5769230769230769 [2024-06-21 15:44:21,404 INFO L175 Difference]: Start difference. First operand has 175 places, 166 transitions, 1913 flow. Second operand 6 states and 135 transitions. [2024-06-21 15:44:21,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 176 transitions, 2275 flow [2024-06-21 15:44:21,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 176 transitions, 2175 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-21 15:44:21,709 INFO L231 Difference]: Finished difference. Result has 176 places, 166 transitions, 1893 flow [2024-06-21 15:44:21,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1813, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1893, PETRI_PLACES=176, PETRI_TRANSITIONS=166} [2024-06-21 15:44:21,709 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 136 predicate places. [2024-06-21 15:44:21,709 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 166 transitions, 1893 flow [2024-06-21 15:44:21,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:21,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:21,710 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:44:21,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 15:44:21,710 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:21,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:21,710 INFO L85 PathProgramCache]: Analyzing trace with hash 1008470580, now seen corresponding path program 6 times [2024-06-21 15:44:21,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:21,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108487493] [2024-06-21 15:44:21,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:21,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:21,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:21,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:21,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:21,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108487493] [2024-06-21 15:44:21,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108487493] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:21,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:21,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:44:21,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085479796] [2024-06-21 15:44:21,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:21,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:44:21,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:21,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:44:21,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:44:21,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 15:44:21,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 166 transitions, 1893 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:21,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:21,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 15:44:21,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:22,370 INFO L124 PetriNetUnfolderBase]: 2337/4108 cut-off events. [2024-06-21 15:44:22,370 INFO L125 PetriNetUnfolderBase]: For 198591/198599 co-relation queries the response was YES. [2024-06-21 15:44:22,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24378 conditions, 4108 events. 2337/4108 cut-off events. For 198591/198599 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 27608 event pairs, 914 based on Foata normal form. 10/4116 useless extension candidates. Maximal degree in co-relation 24290. Up to 3571 conditions per place. [2024-06-21 15:44:22,409 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 106 selfloop transitions, 76 changer transitions 0/189 dead transitions. [2024-06-21 15:44:22,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 189 transitions, 2518 flow [2024-06-21 15:44:22,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:44:22,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:44:22,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-21 15:44:22,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5961538461538461 [2024-06-21 15:44:22,410 INFO L175 Difference]: Start difference. First operand has 176 places, 166 transitions, 1893 flow. Second operand 8 states and 186 transitions. [2024-06-21 15:44:22,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 189 transitions, 2518 flow [2024-06-21 15:44:22,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 189 transitions, 2409 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-21 15:44:22,698 INFO L231 Difference]: Finished difference. Result has 178 places, 169 transitions, 1976 flow [2024-06-21 15:44:22,698 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1784, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1976, PETRI_PLACES=178, PETRI_TRANSITIONS=169} [2024-06-21 15:44:22,698 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 138 predicate places. [2024-06-21 15:44:22,699 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 169 transitions, 1976 flow [2024-06-21 15:44:22,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:22,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:22,699 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:44:22,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 15:44:22,700 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:22,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:22,700 INFO L85 PathProgramCache]: Analyzing trace with hash -763521838, now seen corresponding path program 7 times [2024-06-21 15:44:22,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:22,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271046544] [2024-06-21 15:44:22,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:22,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:22,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:22,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:22,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:22,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271046544] [2024-06-21 15:44:22,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271046544] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:22,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:22,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:44:22,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857838244] [2024-06-21 15:44:22,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:22,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:44:22,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:22,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:44:22,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:44:22,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 15:44:22,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 169 transitions, 1976 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:22,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:22,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 15:44:22,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:23,313 INFO L124 PetriNetUnfolderBase]: 2334/4100 cut-off events. [2024-06-21 15:44:23,313 INFO L125 PetriNetUnfolderBase]: For 204807/204809 co-relation queries the response was YES. [2024-06-21 15:44:23,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24532 conditions, 4100 events. 2334/4100 cut-off events. For 204807/204809 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 27513 event pairs, 946 based on Foata normal form. 1/4098 useless extension candidates. Maximal degree in co-relation 24444. Up to 3530 conditions per place. [2024-06-21 15:44:23,353 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 98 selfloop transitions, 83 changer transitions 0/188 dead transitions. [2024-06-21 15:44:23,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 188 transitions, 2636 flow [2024-06-21 15:44:23,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:44:23,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:44:23,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 160 transitions. [2024-06-21 15:44:23,354 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5860805860805861 [2024-06-21 15:44:23,354 INFO L175 Difference]: Start difference. First operand has 178 places, 169 transitions, 1976 flow. Second operand 7 states and 160 transitions. [2024-06-21 15:44:23,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 188 transitions, 2636 flow [2024-06-21 15:44:23,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 188 transitions, 2462 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-21 15:44:23,708 INFO L231 Difference]: Finished difference. Result has 180 places, 175 transitions, 2102 flow [2024-06-21 15:44:23,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1802, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2102, PETRI_PLACES=180, PETRI_TRANSITIONS=175} [2024-06-21 15:44:23,709 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 140 predicate places. [2024-06-21 15:44:23,709 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 175 transitions, 2102 flow [2024-06-21 15:44:23,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:23,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:23,709 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:44:23,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-21 15:44:23,710 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:23,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:23,710 INFO L85 PathProgramCache]: Analyzing trace with hash -763524814, now seen corresponding path program 4 times [2024-06-21 15:44:23,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:23,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995700311] [2024-06-21 15:44:23,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:23,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:23,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:23,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:23,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:23,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995700311] [2024-06-21 15:44:23,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995700311] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:23,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:23,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:44:23,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825720585] [2024-06-21 15:44:23,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:23,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:44:23,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:23,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:44:23,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:44:23,816 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 15:44:23,816 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 175 transitions, 2102 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:23,816 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:23,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 15:44:23,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:24,330 INFO L124 PetriNetUnfolderBase]: 2349/4126 cut-off events. [2024-06-21 15:44:24,331 INFO L125 PetriNetUnfolderBase]: For 221806/221808 co-relation queries the response was YES. [2024-06-21 15:44:24,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25603 conditions, 4126 events. 2349/4126 cut-off events. For 221806/221808 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 27717 event pairs, 897 based on Foata normal form. 8/4132 useless extension candidates. Maximal degree in co-relation 25513. Up to 3708 conditions per place. [2024-06-21 15:44:24,372 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 161 selfloop transitions, 24 changer transitions 0/192 dead transitions. [2024-06-21 15:44:24,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 192 transitions, 2549 flow [2024-06-21 15:44:24,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:44:24,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:44:24,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 152 transitions. [2024-06-21 15:44:24,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5567765567765568 [2024-06-21 15:44:24,373 INFO L175 Difference]: Start difference. First operand has 180 places, 175 transitions, 2102 flow. Second operand 7 states and 152 transitions. [2024-06-21 15:44:24,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 192 transitions, 2549 flow [2024-06-21 15:44:24,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 192 transitions, 2444 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-21 15:44:24,716 INFO L231 Difference]: Finished difference. Result has 184 places, 176 transitions, 2068 flow [2024-06-21 15:44:24,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1997, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2068, PETRI_PLACES=184, PETRI_TRANSITIONS=176} [2024-06-21 15:44:24,717 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 144 predicate places. [2024-06-21 15:44:24,717 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 176 transitions, 2068 flow [2024-06-21 15:44:24,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:24,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:24,717 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:44:24,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-21 15:44:24,718 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:24,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:24,718 INFO L85 PathProgramCache]: Analyzing trace with hash -763155852, now seen corresponding path program 2 times [2024-06-21 15:44:24,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:24,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226875701] [2024-06-21 15:44:24,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:24,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:24,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:24,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:24,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:24,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226875701] [2024-06-21 15:44:24,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226875701] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:24,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:24,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:44:24,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603604869] [2024-06-21 15:44:24,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:24,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:44:24,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:24,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:44:24,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:44:24,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 15:44:24,810 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 176 transitions, 2068 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:24,810 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:24,810 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 15:44:24,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:25,254 INFO L124 PetriNetUnfolderBase]: 2369/4162 cut-off events. [2024-06-21 15:44:25,254 INFO L125 PetriNetUnfolderBase]: For 228748/228750 co-relation queries the response was YES. [2024-06-21 15:44:25,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25996 conditions, 4162 events. 2369/4162 cut-off events. For 228748/228750 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 27983 event pairs, 897 based on Foata normal form. 6/4166 useless extension candidates. Maximal degree in co-relation 25903. Up to 3710 conditions per place. [2024-06-21 15:44:25,292 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 165 selfloop transitions, 26 changer transitions 0/198 dead transitions. [2024-06-21 15:44:25,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 198 transitions, 2571 flow [2024-06-21 15:44:25,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:44:25,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:44:25,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 155 transitions. [2024-06-21 15:44:25,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5677655677655677 [2024-06-21 15:44:25,294 INFO L175 Difference]: Start difference. First operand has 184 places, 176 transitions, 2068 flow. Second operand 7 states and 155 transitions. [2024-06-21 15:44:25,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 198 transitions, 2571 flow [2024-06-21 15:44:25,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 198 transitions, 2512 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-21 15:44:25,677 INFO L231 Difference]: Finished difference. Result has 187 places, 179 transitions, 2119 flow [2024-06-21 15:44:25,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2009, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2119, PETRI_PLACES=187, PETRI_TRANSITIONS=179} [2024-06-21 15:44:25,678 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 147 predicate places. [2024-06-21 15:44:25,678 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 179 transitions, 2119 flow [2024-06-21 15:44:25,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:25,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:25,678 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:44:25,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-21 15:44:25,678 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:25,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:25,679 INFO L85 PathProgramCache]: Analyzing trace with hash -349848972, now seen corresponding path program 3 times [2024-06-21 15:44:25,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:25,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873870169] [2024-06-21 15:44:25,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:25,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:25,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:25,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:25,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:25,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873870169] [2024-06-21 15:44:25,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873870169] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:25,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:25,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:44:25,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692036472] [2024-06-21 15:44:25,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:25,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:44:25,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:25,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:44:25,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:44:25,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 15:44:25,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 179 transitions, 2119 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:25,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:25,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 15:44:25,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:26,308 INFO L124 PetriNetUnfolderBase]: 2356/4143 cut-off events. [2024-06-21 15:44:26,308 INFO L125 PetriNetUnfolderBase]: For 229711/229713 co-relation queries the response was YES. [2024-06-21 15:44:26,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25753 conditions, 4143 events. 2356/4143 cut-off events. For 229711/229713 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 27876 event pairs, 876 based on Foata normal form. 6/4147 useless extension candidates. Maximal degree in co-relation 25658. Up to 3559 conditions per place. [2024-06-21 15:44:26,346 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 162 selfloop transitions, 32 changer transitions 0/201 dead transitions. [2024-06-21 15:44:26,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 201 transitions, 2613 flow [2024-06-21 15:44:26,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:44:26,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:44:26,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 155 transitions. [2024-06-21 15:44:26,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5677655677655677 [2024-06-21 15:44:26,347 INFO L175 Difference]: Start difference. First operand has 187 places, 179 transitions, 2119 flow. Second operand 7 states and 155 transitions. [2024-06-21 15:44:26,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 201 transitions, 2613 flow [2024-06-21 15:44:26,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 201 transitions, 2557 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-21 15:44:26,792 INFO L231 Difference]: Finished difference. Result has 192 places, 181 transitions, 2163 flow [2024-06-21 15:44:26,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2063, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2163, PETRI_PLACES=192, PETRI_TRANSITIONS=181} [2024-06-21 15:44:26,793 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 152 predicate places. [2024-06-21 15:44:26,793 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 181 transitions, 2163 flow [2024-06-21 15:44:26,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:26,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:26,793 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:44:26,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-21 15:44:26,793 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:26,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:26,794 INFO L85 PathProgramCache]: Analyzing trace with hash 403097560, now seen corresponding path program 1 times [2024-06-21 15:44:26,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:26,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82752826] [2024-06-21 15:44:26,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:26,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:26,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:26,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:26,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:26,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82752826] [2024-06-21 15:44:26,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82752826] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:26,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:26,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:44:26,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075518657] [2024-06-21 15:44:26,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:26,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:44:26,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:26,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:44:26,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:44:26,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 15:44:26,878 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 181 transitions, 2163 flow. Second operand has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:26,878 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:26,878 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 15:44:26,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:27,348 INFO L124 PetriNetUnfolderBase]: 2363/4152 cut-off events. [2024-06-21 15:44:27,348 INFO L125 PetriNetUnfolderBase]: For 235489/235489 co-relation queries the response was YES. [2024-06-21 15:44:27,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25922 conditions, 4152 events. 2363/4152 cut-off events. For 235489/235489 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 27904 event pairs, 844 based on Foata normal form. 6/4153 useless extension candidates. Maximal degree in co-relation 25824. Up to 3658 conditions per place. [2024-06-21 15:44:27,389 INFO L140 encePairwiseOnDemand]: 33/39 looper letters, 183 selfloop transitions, 15 changer transitions 0/205 dead transitions. [2024-06-21 15:44:27,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 205 transitions, 2772 flow [2024-06-21 15:44:27,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:44:27,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:44:27,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 122 transitions. [2024-06-21 15:44:27,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6256410256410256 [2024-06-21 15:44:27,390 INFO L175 Difference]: Start difference. First operand has 192 places, 181 transitions, 2163 flow. Second operand 5 states and 122 transitions. [2024-06-21 15:44:27,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 205 transitions, 2772 flow [2024-06-21 15:44:27,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 205 transitions, 2609 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-21 15:44:27,798 INFO L231 Difference]: Finished difference. Result has 190 places, 182 transitions, 2053 flow [2024-06-21 15:44:27,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2011, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2053, PETRI_PLACES=190, PETRI_TRANSITIONS=182} [2024-06-21 15:44:27,798 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 150 predicate places. [2024-06-21 15:44:27,798 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 182 transitions, 2053 flow [2024-06-21 15:44:27,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:27,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:27,799 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:44:27,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-21 15:44:27,799 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:27,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:27,799 INFO L85 PathProgramCache]: Analyzing trace with hash -2083999152, now seen corresponding path program 1 times [2024-06-21 15:44:27,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:27,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892441452] [2024-06-21 15:44:27,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:27,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:27,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:27,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:27,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:27,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892441452] [2024-06-21 15:44:27,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892441452] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:27,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:27,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:44:27,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634385958] [2024-06-21 15:44:27,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:27,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:44:27,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:27,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:44:27,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:44:27,884 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 15:44:27,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 182 transitions, 2053 flow. Second operand has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:27,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:27,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 15:44:27,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:28,357 INFO L124 PetriNetUnfolderBase]: 2350/4133 cut-off events. [2024-06-21 15:44:28,357 INFO L125 PetriNetUnfolderBase]: For 235066/235066 co-relation queries the response was YES. [2024-06-21 15:44:28,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25283 conditions, 4133 events. 2350/4133 cut-off events. For 235066/235066 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 27784 event pairs, 837 based on Foata normal form. 6/4134 useless extension candidates. Maximal degree in co-relation 25187. Up to 3652 conditions per place. [2024-06-21 15:44:28,399 INFO L140 encePairwiseOnDemand]: 33/39 looper letters, 182 selfloop transitions, 15 changer transitions 0/204 dead transitions. [2024-06-21 15:44:28,399 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 204 transitions, 2537 flow [2024-06-21 15:44:28,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:44:28,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:44:28,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 121 transitions. [2024-06-21 15:44:28,400 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6205128205128205 [2024-06-21 15:44:28,400 INFO L175 Difference]: Start difference. First operand has 190 places, 182 transitions, 2053 flow. Second operand 5 states and 121 transitions. [2024-06-21 15:44:28,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 204 transitions, 2537 flow [2024-06-21 15:44:28,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 204 transitions, 2510 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-21 15:44:28,774 INFO L231 Difference]: Finished difference. Result has 193 places, 182 transitions, 2060 flow [2024-06-21 15:44:28,774 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2026, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2060, PETRI_PLACES=193, PETRI_TRANSITIONS=182} [2024-06-21 15:44:28,774 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 153 predicate places. [2024-06-21 15:44:28,774 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 182 transitions, 2060 flow [2024-06-21 15:44:28,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:28,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:28,775 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:44:28,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-21 15:44:28,775 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:28,775 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:28,775 INFO L85 PathProgramCache]: Analyzing trace with hash -1889924458, now seen corresponding path program 1 times [2024-06-21 15:44:28,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:28,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182581754] [2024-06-21 15:44:28,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:28,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:28,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:28,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:28,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:28,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182581754] [2024-06-21 15:44:28,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182581754] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:28,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:28,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:44:28,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645099522] [2024-06-21 15:44:28,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:28,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:44:28,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:28,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:44:28,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:44:28,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 15:44:28,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 182 transitions, 2060 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-21 15:44:28,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:28,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 15:44:28,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:29,484 INFO L124 PetriNetUnfolderBase]: 2355/4146 cut-off events. [2024-06-21 15:44:29,485 INFO L125 PetriNetUnfolderBase]: For 228684/228696 co-relation queries the response was YES. [2024-06-21 15:44:29,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25335 conditions, 4146 events. 2355/4146 cut-off events. For 228684/228696 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 27892 event pairs, 907 based on Foata normal form. 13/4153 useless extension candidates. Maximal degree in co-relation 25238. Up to 3605 conditions per place. [2024-06-21 15:44:29,528 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 138 selfloop transitions, 75 changer transitions 0/220 dead transitions. [2024-06-21 15:44:29,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 220 transitions, 2810 flow [2024-06-21 15:44:29,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 15:44:29,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 15:44:29,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 248 transitions. [2024-06-21 15:44:29,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.578088578088578 [2024-06-21 15:44:29,533 INFO L175 Difference]: Start difference. First operand has 193 places, 182 transitions, 2060 flow. Second operand 11 states and 248 transitions. [2024-06-21 15:44:29,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 220 transitions, 2810 flow [2024-06-21 15:44:29,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 220 transitions, 2769 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-21 15:44:29,899 INFO L231 Difference]: Finished difference. Result has 200 places, 185 transitions, 2205 flow [2024-06-21 15:44:29,900 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2019, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2205, PETRI_PLACES=200, PETRI_TRANSITIONS=185} [2024-06-21 15:44:29,900 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 160 predicate places. [2024-06-21 15:44:29,900 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 185 transitions, 2205 flow [2024-06-21 15:44:29,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-21 15:44:29,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:29,900 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:44:29,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-21 15:44:29,901 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:29,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:29,901 INFO L85 PathProgramCache]: Analyzing trace with hash 864018936, now seen corresponding path program 2 times [2024-06-21 15:44:29,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:29,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530282958] [2024-06-21 15:44:29,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:29,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:29,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:29,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:29,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:29,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530282958] [2024-06-21 15:44:29,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530282958] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:29,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:29,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:44:29,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305216307] [2024-06-21 15:44:29,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:29,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:44:29,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:29,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:44:29,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:44:30,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 15:44:30,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 185 transitions, 2205 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-21 15:44:30,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:30,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 15:44:30,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:30,574 INFO L124 PetriNetUnfolderBase]: 2352/4142 cut-off events. [2024-06-21 15:44:30,575 INFO L125 PetriNetUnfolderBase]: For 235583/235595 co-relation queries the response was YES. [2024-06-21 15:44:30,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25528 conditions, 4142 events. 2352/4142 cut-off events. For 235583/235595 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 27879 event pairs, 907 based on Foata normal form. 13/4149 useless extension candidates. Maximal degree in co-relation 25430. Up to 3602 conditions per place. [2024-06-21 15:44:30,614 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 137 selfloop transitions, 75 changer transitions 0/219 dead transitions. [2024-06-21 15:44:30,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 219 transitions, 2819 flow [2024-06-21 15:44:30,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 15:44:30,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 15:44:30,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 247 transitions. [2024-06-21 15:44:30,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5757575757575758 [2024-06-21 15:44:30,615 INFO L175 Difference]: Start difference. First operand has 200 places, 185 transitions, 2205 flow. Second operand 11 states and 247 transitions. [2024-06-21 15:44:30,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 219 transitions, 2819 flow [2024-06-21 15:44:31,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 219 transitions, 2623 flow, removed 14 selfloop flow, removed 9 redundant places. [2024-06-21 15:44:31,021 INFO L231 Difference]: Finished difference. Result has 202 places, 185 transitions, 2167 flow [2024-06-21 15:44:31,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2011, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2167, PETRI_PLACES=202, PETRI_TRANSITIONS=185} [2024-06-21 15:44:31,022 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 162 predicate places. [2024-06-21 15:44:31,022 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 185 transitions, 2167 flow [2024-06-21 15:44:31,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-21 15:44:31,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:31,022 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:44:31,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-21 15:44:31,023 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:31,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:31,023 INFO L85 PathProgramCache]: Analyzing trace with hash -1384157238, now seen corresponding path program 3 times [2024-06-21 15:44:31,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:31,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047566855] [2024-06-21 15:44:31,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:31,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:31,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:31,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:31,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:31,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047566855] [2024-06-21 15:44:31,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047566855] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:31,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:31,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:44:31,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503511572] [2024-06-21 15:44:31,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:31,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:44:31,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:31,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:44:31,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:44:31,158 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 15:44:31,158 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 185 transitions, 2167 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-21 15:44:31,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:31,158 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 15:44:31,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:31,718 INFO L124 PetriNetUnfolderBase]: 2357/4155 cut-off events. [2024-06-21 15:44:31,718 INFO L125 PetriNetUnfolderBase]: For 235587/235595 co-relation queries the response was YES. [2024-06-21 15:44:31,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25549 conditions, 4155 events. 2357/4155 cut-off events. For 235587/235595 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 28018 event pairs, 910 based on Foata normal form. 9/4162 useless extension candidates. Maximal degree in co-relation 25450. Up to 3608 conditions per place. [2024-06-21 15:44:31,762 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 121 selfloop transitions, 82 changer transitions 0/210 dead transitions. [2024-06-21 15:44:31,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 210 transitions, 2766 flow [2024-06-21 15:44:31,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 15:44:31,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 15:44:31,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 237 transitions. [2024-06-21 15:44:31,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5524475524475524 [2024-06-21 15:44:31,764 INFO L175 Difference]: Start difference. First operand has 202 places, 185 transitions, 2167 flow. Second operand 11 states and 237 transitions. [2024-06-21 15:44:31,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 210 transitions, 2766 flow [2024-06-21 15:44:32,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 210 transitions, 2606 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-21 15:44:32,203 INFO L231 Difference]: Finished difference. Result has 203 places, 188 transitions, 2214 flow [2024-06-21 15:44:32,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2015, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2214, PETRI_PLACES=203, PETRI_TRANSITIONS=188} [2024-06-21 15:44:32,204 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 163 predicate places. [2024-06-21 15:44:32,204 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 188 transitions, 2214 flow [2024-06-21 15:44:32,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-21 15:44:32,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:32,204 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:44:32,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-21 15:44:32,204 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:32,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:32,205 INFO L85 PathProgramCache]: Analyzing trace with hash 489989300, now seen corresponding path program 4 times [2024-06-21 15:44:32,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:32,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952258687] [2024-06-21 15:44:32,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:32,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:32,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:32,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:32,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:32,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952258687] [2024-06-21 15:44:32,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952258687] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:32,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:32,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:44:32,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411060807] [2024-06-21 15:44:32,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:32,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:44:32,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:32,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:44:32,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:44:32,328 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 15:44:32,328 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 188 transitions, 2214 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-21 15:44:32,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:32,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 15:44:32,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:32,963 INFO L124 PetriNetUnfolderBase]: 2354/4151 cut-off events. [2024-06-21 15:44:32,964 INFO L125 PetriNetUnfolderBase]: For 234225/234233 co-relation queries the response was YES. [2024-06-21 15:44:32,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25477 conditions, 4151 events. 2354/4151 cut-off events. For 234225/234233 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 27975 event pairs, 910 based on Foata normal form. 9/4158 useless extension candidates. Maximal degree in co-relation 25377. Up to 3605 conditions per place. [2024-06-21 15:44:33,005 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 120 selfloop transitions, 82 changer transitions 0/209 dead transitions. [2024-06-21 15:44:33,005 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 209 transitions, 2668 flow [2024-06-21 15:44:33,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 15:44:33,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 15:44:33,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 236 transitions. [2024-06-21 15:44:33,006 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5501165501165501 [2024-06-21 15:44:33,006 INFO L175 Difference]: Start difference. First operand has 203 places, 188 transitions, 2214 flow. Second operand 11 states and 236 transitions. [2024-06-21 15:44:33,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 209 transitions, 2668 flow [2024-06-21 15:44:33,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 209 transitions, 2480 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-21 15:44:33,416 INFO L231 Difference]: Finished difference. Result has 205 places, 188 transitions, 2196 flow [2024-06-21 15:44:33,416 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2026, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2196, PETRI_PLACES=205, PETRI_TRANSITIONS=188} [2024-06-21 15:44:33,417 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 165 predicate places. [2024-06-21 15:44:33,417 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 188 transitions, 2196 flow [2024-06-21 15:44:33,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-21 15:44:33,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:33,417 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:44:33,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-21 15:44:33,417 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:33,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:33,418 INFO L85 PathProgramCache]: Analyzing trace with hash 2100628056, now seen corresponding path program 5 times [2024-06-21 15:44:33,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:33,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633062940] [2024-06-21 15:44:33,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:33,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:33,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:33,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:33,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:33,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633062940] [2024-06-21 15:44:33,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633062940] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:33,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:33,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:44:33,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620545202] [2024-06-21 15:44:33,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:33,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:44:33,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:33,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:44:33,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:44:33,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 15:44:33,522 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 188 transitions, 2196 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-21 15:44:33,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:33,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 15:44:33,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:34,033 INFO L124 PetriNetUnfolderBase]: 2351/4144 cut-off events. [2024-06-21 15:44:34,034 INFO L125 PetriNetUnfolderBase]: For 240921/240923 co-relation queries the response was YES. [2024-06-21 15:44:34,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25528 conditions, 4144 events. 2351/4144 cut-off events. For 240921/240923 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 27945 event pairs, 941 based on Foata normal form. 1/4142 useless extension candidates. Maximal degree in co-relation 25427. Up to 3565 conditions per place. [2024-06-21 15:44:34,078 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 105 selfloop transitions, 90 changer transitions 0/202 dead transitions. [2024-06-21 15:44:34,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 202 transitions, 2618 flow [2024-06-21 15:44:34,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 15:44:34,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 15:44:34,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 211 transitions. [2024-06-21 15:44:34,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.541025641025641 [2024-06-21 15:44:34,079 INFO L175 Difference]: Start difference. First operand has 205 places, 188 transitions, 2196 flow. Second operand 10 states and 211 transitions. [2024-06-21 15:44:34,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 202 transitions, 2618 flow [2024-06-21 15:44:34,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 202 transitions, 2454 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-06-21 15:44:34,624 INFO L231 Difference]: Finished difference. Result has 205 places, 188 transitions, 2218 flow [2024-06-21 15:44:34,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2032, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2218, PETRI_PLACES=205, PETRI_TRANSITIONS=188} [2024-06-21 15:44:34,624 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 165 predicate places. [2024-06-21 15:44:34,624 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 188 transitions, 2218 flow [2024-06-21 15:44:34,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-21 15:44:34,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:34,625 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:44:34,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-21 15:44:34,625 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:34,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:34,625 INFO L85 PathProgramCache]: Analyzing trace with hash -1197821225, now seen corresponding path program 1 times [2024-06-21 15:44:34,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:34,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548531820] [2024-06-21 15:44:34,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:34,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:34,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:34,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:34,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:34,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548531820] [2024-06-21 15:44:34,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548531820] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:34,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:34,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:44:34,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989478476] [2024-06-21 15:44:34,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:34,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:44:34,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:34,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:44:34,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:44:34,765 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 15:44:34,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 188 transitions, 2218 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-21 15:44:34,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:34,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 15:44:34,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:35,317 INFO L124 PetriNetUnfolderBase]: 2338/4121 cut-off events. [2024-06-21 15:44:35,317 INFO L125 PetriNetUnfolderBase]: For 256659/256671 co-relation queries the response was YES. [2024-06-21 15:44:35,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24696 conditions, 4121 events. 2338/4121 cut-off events. For 256659/256671 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 27589 event pairs, 731 based on Foata normal form. 36/4156 useless extension candidates. Maximal degree in co-relation 24594. Up to 1560 conditions per place. [2024-06-21 15:44:35,357 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 161 selfloop transitions, 57 changer transitions 14/239 dead transitions. [2024-06-21 15:44:35,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 239 transitions, 3112 flow [2024-06-21 15:44:35,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 15:44:35,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 15:44:35,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 224 transitions. [2024-06-21 15:44:35,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6381766381766382 [2024-06-21 15:44:35,358 INFO L175 Difference]: Start difference. First operand has 205 places, 188 transitions, 2218 flow. Second operand 9 states and 224 transitions. [2024-06-21 15:44:35,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 239 transitions, 3112 flow [2024-06-21 15:44:35,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 239 transitions, 2869 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-21 15:44:35,744 INFO L231 Difference]: Finished difference. Result has 205 places, 184 transitions, 2056 flow [2024-06-21 15:44:35,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1975, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2056, PETRI_PLACES=205, PETRI_TRANSITIONS=184} [2024-06-21 15:44:35,745 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 165 predicate places. [2024-06-21 15:44:35,745 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 184 transitions, 2056 flow [2024-06-21 15:44:35,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-21 15:44:35,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:35,745 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] [2024-06-21 15:44:35,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-21 15:44:35,746 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:35,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:35,746 INFO L85 PathProgramCache]: Analyzing trace with hash -1442184741, now seen corresponding path program 2 times [2024-06-21 15:44:35,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:35,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264609107] [2024-06-21 15:44:35,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:35,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:35,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:35,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:35,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:35,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264609107] [2024-06-21 15:44:35,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264609107] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:35,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:35,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:44:35,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780839463] [2024-06-21 15:44:35,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:35,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:44:35,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:35,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:44:35,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:44:35,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 15:44:35,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 184 transitions, 2056 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-21 15:44:35,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:35,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 15:44:35,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:36,478 INFO L124 PetriNetUnfolderBase]: 2516/4353 cut-off events. [2024-06-21 15:44:36,478 INFO L125 PetriNetUnfolderBase]: For 333121/333133 co-relation queries the response was YES. [2024-06-21 15:44:36,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29230 conditions, 4353 events. 2516/4353 cut-off events. For 333121/333133 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 29006 event pairs, 785 based on Foata normal form. 18/4370 useless extension candidates. Maximal degree in co-relation 29128. Up to 1768 conditions per place. [2024-06-21 15:44:36,519 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 152 selfloop transitions, 62 changer transitions 11/232 dead transitions. [2024-06-21 15:44:36,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 232 transitions, 2948 flow [2024-06-21 15:44:36,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 15:44:36,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 15:44:36,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 219 transitions. [2024-06-21 15:44:36,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6239316239316239 [2024-06-21 15:44:36,520 INFO L175 Difference]: Start difference. First operand has 205 places, 184 transitions, 2056 flow. Second operand 9 states and 219 transitions. [2024-06-21 15:44:36,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 232 transitions, 2948 flow [2024-06-21 15:44:36,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 232 transitions, 2817 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-21 15:44:36,856 INFO L231 Difference]: Finished difference. Result has 205 places, 183 transitions, 2066 flow [2024-06-21 15:44:36,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1937, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2066, PETRI_PLACES=205, PETRI_TRANSITIONS=183} [2024-06-21 15:44:36,856 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 165 predicate places. [2024-06-21 15:44:36,856 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 183 transitions, 2066 flow [2024-06-21 15:44:36,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-21 15:44:36,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:36,857 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] [2024-06-21 15:44:36,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-21 15:44:36,857 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:36,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:36,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1389806211, now seen corresponding path program 3 times [2024-06-21 15:44:36,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:36,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744216767] [2024-06-21 15:44:36,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:36,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:36,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:36,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:36,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:36,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744216767] [2024-06-21 15:44:36,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744216767] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:36,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:36,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:44:36,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222251316] [2024-06-21 15:44:36,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:36,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:44:36,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:36,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:44:36,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:44:36,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 15:44:36,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 183 transitions, 2066 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-21 15:44:36,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:36,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 15:44:36,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:37,571 INFO L124 PetriNetUnfolderBase]: 2399/4179 cut-off events. [2024-06-21 15:44:37,572 INFO L125 PetriNetUnfolderBase]: For 312938/312950 co-relation queries the response was YES. [2024-06-21 15:44:37,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26723 conditions, 4179 events. 2399/4179 cut-off events. For 312938/312950 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 28008 event pairs, 870 based on Foata normal form. 42/4220 useless extension candidates. Maximal degree in co-relation 26621. Up to 2889 conditions per place. [2024-06-21 15:44:37,621 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 150 selfloop transitions, 53 changer transitions 18/228 dead transitions. [2024-06-21 15:44:37,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 228 transitions, 2784 flow [2024-06-21 15:44:37,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 15:44:37,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 15:44:37,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 237 transitions. [2024-06-21 15:44:37,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6076923076923076 [2024-06-21 15:44:37,623 INFO L175 Difference]: Start difference. First operand has 205 places, 183 transitions, 2066 flow. Second operand 10 states and 237 transitions. [2024-06-21 15:44:37,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 228 transitions, 2784 flow [2024-06-21 15:44:38,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 228 transitions, 2653 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-21 15:44:38,144 INFO L231 Difference]: Finished difference. Result has 203 places, 175 transitions, 1958 flow [2024-06-21 15:44:38,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1939, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1958, PETRI_PLACES=203, PETRI_TRANSITIONS=175} [2024-06-21 15:44:38,145 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 163 predicate places. [2024-06-21 15:44:38,145 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 175 transitions, 1958 flow [2024-06-21 15:44:38,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-21 15:44:38,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:38,145 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] [2024-06-21 15:44:38,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-21 15:44:38,145 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:38,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:38,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1306210779, now seen corresponding path program 4 times [2024-06-21 15:44:38,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:38,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720358907] [2024-06-21 15:44:38,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:38,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:38,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:38,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:38,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:38,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720358907] [2024-06-21 15:44:38,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720358907] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:38,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:38,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:44:38,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808032008] [2024-06-21 15:44:38,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:38,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:44:38,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:38,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:44:38,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:44:38,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 15:44:38,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 175 transitions, 1958 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-21 15:44:38,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:38,272 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 15:44:38,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:38,792 INFO L124 PetriNetUnfolderBase]: 2157/3760 cut-off events. [2024-06-21 15:44:38,792 INFO L125 PetriNetUnfolderBase]: For 268674/268686 co-relation queries the response was YES. [2024-06-21 15:44:38,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23535 conditions, 3760 events. 2157/3760 cut-off events. For 268674/268686 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 24755 event pairs, 804 based on Foata normal form. 46/3805 useless extension candidates. Maximal degree in co-relation 23435. Up to 3145 conditions per place. [2024-06-21 15:44:38,830 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 134 selfloop transitions, 47 changer transitions 23/211 dead transitions. [2024-06-21 15:44:38,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 211 transitions, 2496 flow [2024-06-21 15:44:38,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 15:44:38,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 15:44:38,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 226 transitions. [2024-06-21 15:44:38,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5794871794871795 [2024-06-21 15:44:38,831 INFO L175 Difference]: Start difference. First operand has 203 places, 175 transitions, 1958 flow. Second operand 10 states and 226 transitions. [2024-06-21 15:44:38,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 211 transitions, 2496 flow [2024-06-21 15:44:39,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 211 transitions, 2383 flow, removed 7 selfloop flow, removed 10 redundant places. [2024-06-21 15:44:39,240 INFO L231 Difference]: Finished difference. Result has 200 places, 168 transitions, 1876 flow [2024-06-21 15:44:39,240 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1849, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1876, PETRI_PLACES=200, PETRI_TRANSITIONS=168} [2024-06-21 15:44:39,240 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 160 predicate places. [2024-06-21 15:44:39,240 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 168 transitions, 1876 flow [2024-06-21 15:44:39,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-21 15:44:39,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:39,241 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] [2024-06-21 15:44:39,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-21 15:44:39,241 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:39,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:39,241 INFO L85 PathProgramCache]: Analyzing trace with hash -1792646693, now seen corresponding path program 5 times [2024-06-21 15:44:39,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:39,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413864595] [2024-06-21 15:44:39,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:39,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:39,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:39,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:39,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:39,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413864595] [2024-06-21 15:44:39,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413864595] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:39,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:39,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:44:39,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788514758] [2024-06-21 15:44:39,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:39,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:44:39,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:39,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:44:39,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:44:39,386 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 15:44:39,386 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 168 transitions, 1876 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-21 15:44:39,386 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:39,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 15:44:39,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:39,831 INFO L124 PetriNetUnfolderBase]: 2061/3589 cut-off events. [2024-06-21 15:44:39,832 INFO L125 PetriNetUnfolderBase]: For 213872/213883 co-relation queries the response was YES. [2024-06-21 15:44:39,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22505 conditions, 3589 events. 2061/3589 cut-off events. For 213872/213883 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 23362 event pairs, 768 based on Foata normal form. 19/3607 useless extension candidates. Maximal degree in co-relation 22407. Up to 3141 conditions per place. [2024-06-21 15:44:39,868 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 133 selfloop transitions, 45 changer transitions 10/195 dead transitions. [2024-06-21 15:44:39,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 195 transitions, 2348 flow [2024-06-21 15:44:39,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 15:44:39,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 15:44:39,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 200 transitions. [2024-06-21 15:44:39,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5698005698005698 [2024-06-21 15:44:39,869 INFO L175 Difference]: Start difference. First operand has 200 places, 168 transitions, 1876 flow. Second operand 9 states and 200 transitions. [2024-06-21 15:44:39,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 195 transitions, 2348 flow [2024-06-21 15:44:40,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 195 transitions, 2242 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-06-21 15:44:40,187 INFO L231 Difference]: Finished difference. Result has 193 places, 165 transitions, 1832 flow [2024-06-21 15:44:40,188 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1772, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1832, PETRI_PLACES=193, PETRI_TRANSITIONS=165} [2024-06-21 15:44:40,188 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 153 predicate places. [2024-06-21 15:44:40,188 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 165 transitions, 1832 flow [2024-06-21 15:44:40,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-21 15:44:40,188 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:40,189 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] [2024-06-21 15:44:40,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-21 15:44:40,189 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:40,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:40,189 INFO L85 PathProgramCache]: Analyzing trace with hash -1795503653, now seen corresponding path program 6 times [2024-06-21 15:44:40,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:40,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006161147] [2024-06-21 15:44:40,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:40,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:40,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:40,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:40,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:40,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006161147] [2024-06-21 15:44:40,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006161147] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:40,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:40,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:44:40,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843275374] [2024-06-21 15:44:40,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:40,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:44:40,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:40,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:44:40,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:44:40,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 15:44:40,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 165 transitions, 1832 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-21 15:44:40,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:40,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 15:44:40,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:40,803 INFO L124 PetriNetUnfolderBase]: 2229/3856 cut-off events. [2024-06-21 15:44:40,804 INFO L125 PetriNetUnfolderBase]: For 233805/233816 co-relation queries the response was YES. [2024-06-21 15:44:40,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24821 conditions, 3856 events. 2229/3856 cut-off events. For 233805/233816 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 25361 event pairs, 840 based on Foata normal form. 19/3874 useless extension candidates. Maximal degree in co-relation 24726. Up to 3107 conditions per place. [2024-06-21 15:44:40,843 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 137 selfloop transitions, 42 changer transitions 14/200 dead transitions. [2024-06-21 15:44:40,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 200 transitions, 2470 flow [2024-06-21 15:44:40,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 15:44:40,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 15:44:40,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 206 transitions. [2024-06-21 15:44:40,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5868945868945868 [2024-06-21 15:44:40,845 INFO L175 Difference]: Start difference. First operand has 193 places, 165 transitions, 1832 flow. Second operand 9 states and 206 transitions. [2024-06-21 15:44:40,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 200 transitions, 2470 flow [2024-06-21 15:44:41,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 200 transitions, 2370 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-21 15:44:41,195 INFO L231 Difference]: Finished difference. Result has 192 places, 161 transitions, 1770 flow [2024-06-21 15:44:41,195 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1736, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1770, PETRI_PLACES=192, PETRI_TRANSITIONS=161} [2024-06-21 15:44:41,196 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 152 predicate places. [2024-06-21 15:44:41,196 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 161 transitions, 1770 flow [2024-06-21 15:44:41,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-21 15:44:41,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:41,196 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] [2024-06-21 15:44:41,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-21 15:44:41,196 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:41,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:41,197 INFO L85 PathProgramCache]: Analyzing trace with hash 56658365, now seen corresponding path program 7 times [2024-06-21 15:44:41,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:41,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140347267] [2024-06-21 15:44:41,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:41,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:41,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:41,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:41,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:41,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140347267] [2024-06-21 15:44:41,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140347267] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:41,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:41,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:44:41,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149788414] [2024-06-21 15:44:41,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:41,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:44:41,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:41,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:44:41,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:44:41,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 15:44:41,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 161 transitions, 1770 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-21 15:44:41,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:41,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 15:44:41,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:41,790 INFO L124 PetriNetUnfolderBase]: 2102/3652 cut-off events. [2024-06-21 15:44:41,790 INFO L125 PetriNetUnfolderBase]: For 215590/215604 co-relation queries the response was YES. [2024-06-21 15:44:41,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22340 conditions, 3652 events. 2102/3652 cut-off events. For 215590/215604 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 24048 event pairs, 686 based on Foata normal form. 34/3685 useless extension candidates. Maximal degree in co-relation 22245. Up to 2035 conditions per place. [2024-06-21 15:44:41,823 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 131 selfloop transitions, 32 changer transitions 21/191 dead transitions. [2024-06-21 15:44:41,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 191 transitions, 2362 flow [2024-06-21 15:44:41,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:44:41,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:44:41,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-21 15:44:41,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6263736263736264 [2024-06-21 15:44:41,824 INFO L175 Difference]: Start difference. First operand has 192 places, 161 transitions, 1770 flow. Second operand 7 states and 171 transitions. [2024-06-21 15:44:41,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 191 transitions, 2362 flow [2024-06-21 15:44:42,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 191 transitions, 2256 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-21 15:44:42,021 INFO L231 Difference]: Finished difference. Result has 187 places, 150 transitions, 1606 flow [2024-06-21 15:44:42,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1668, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1606, PETRI_PLACES=187, PETRI_TRANSITIONS=150} [2024-06-21 15:44:42,021 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 147 predicate places. [2024-06-21 15:44:42,021 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 150 transitions, 1606 flow [2024-06-21 15:44:42,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-21 15:44:42,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:42,022 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] [2024-06-21 15:44:42,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-21 15:44:42,022 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:42,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:42,022 INFO L85 PathProgramCache]: Analyzing trace with hash 234153143, now seen corresponding path program 1 times [2024-06-21 15:44:42,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:42,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669227198] [2024-06-21 15:44:42,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:42,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:42,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:42,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:42,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:42,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669227198] [2024-06-21 15:44:42,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669227198] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:42,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:42,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:44:42,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869441783] [2024-06-21 15:44:42,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:42,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:44:42,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:42,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:44:42,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:44:42,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 15:44:42,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 150 transitions, 1606 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:42,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:42,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 15:44:42,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:42,512 INFO L124 PetriNetUnfolderBase]: 1868/3254 cut-off events. [2024-06-21 15:44:42,512 INFO L125 PetriNetUnfolderBase]: For 186164/186168 co-relation queries the response was YES. [2024-06-21 15:44:42,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20834 conditions, 3254 events. 1868/3254 cut-off events. For 186164/186168 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 21146 event pairs, 620 based on Foata normal form. 10/3263 useless extension candidates. Maximal degree in co-relation 20740. Up to 2685 conditions per place. [2024-06-21 15:44:42,541 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 132 selfloop transitions, 34 changer transitions 0/173 dead transitions. [2024-06-21 15:44:42,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 173 transitions, 2146 flow [2024-06-21 15:44:42,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:44:42,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:44:42,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-21 15:44:42,542 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6153846153846154 [2024-06-21 15:44:42,543 INFO L175 Difference]: Start difference. First operand has 187 places, 150 transitions, 1606 flow. Second operand 6 states and 144 transitions. [2024-06-21 15:44:42,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 173 transitions, 2146 flow [2024-06-21 15:44:42,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 173 transitions, 2051 flow, removed 11 selfloop flow, removed 11 redundant places. [2024-06-21 15:44:42,750 INFO L231 Difference]: Finished difference. Result has 177 places, 152 transitions, 1631 flow [2024-06-21 15:44:42,751 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1519, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1631, PETRI_PLACES=177, PETRI_TRANSITIONS=152} [2024-06-21 15:44:42,751 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 137 predicate places. [2024-06-21 15:44:42,751 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 152 transitions, 1631 flow [2024-06-21 15:44:42,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:42,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:42,751 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] [2024-06-21 15:44:42,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-21 15:44:42,752 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:42,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:42,752 INFO L85 PathProgramCache]: Analyzing trace with hash 65229245, now seen corresponding path program 8 times [2024-06-21 15:44:42,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:42,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110541033] [2024-06-21 15:44:42,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:42,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:42,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:42,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:42,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:42,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110541033] [2024-06-21 15:44:42,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110541033] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:42,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:42,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:44:42,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967790083] [2024-06-21 15:44:42,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:42,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:44:42,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:42,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:44:42,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:44:42,894 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 15:44:42,895 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 152 transitions, 1631 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-21 15:44:42,895 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:42,895 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 15:44:42,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:43,278 INFO L124 PetriNetUnfolderBase]: 1799/3139 cut-off events. [2024-06-21 15:44:43,278 INFO L125 PetriNetUnfolderBase]: For 158760/158764 co-relation queries the response was YES. [2024-06-21 15:44:43,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18522 conditions, 3139 events. 1799/3139 cut-off events. For 158760/158764 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 20176 event pairs, 683 based on Foata normal form. 38/3176 useless extension candidates. Maximal degree in co-relation 18433. Up to 2613 conditions per place. [2024-06-21 15:44:43,305 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 118 selfloop transitions, 26 changer transitions 21/172 dead transitions. [2024-06-21 15:44:43,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 172 transitions, 2037 flow [2024-06-21 15:44:43,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:44:43,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:44:43,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-06-21 15:44:43,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5897435897435898 [2024-06-21 15:44:43,306 INFO L175 Difference]: Start difference. First operand has 177 places, 152 transitions, 1631 flow. Second operand 7 states and 161 transitions. [2024-06-21 15:44:43,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 172 transitions, 2037 flow [2024-06-21 15:44:43,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 172 transitions, 1987 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-21 15:44:43,461 INFO L231 Difference]: Finished difference. Result has 181 places, 142 transitions, 1523 flow [2024-06-21 15:44:43,461 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1581, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1523, PETRI_PLACES=181, PETRI_TRANSITIONS=142} [2024-06-21 15:44:43,461 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 141 predicate places. [2024-06-21 15:44:43,462 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 142 transitions, 1523 flow [2024-06-21 15:44:43,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-21 15:44:43,462 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:43,462 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] [2024-06-21 15:44:43,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-21 15:44:43,462 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:43,463 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:43,463 INFO L85 PathProgramCache]: Analyzing trace with hash 352116575, now seen corresponding path program 9 times [2024-06-21 15:44:43,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:43,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462765598] [2024-06-21 15:44:43,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:43,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:43,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:43,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:43,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:43,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462765598] [2024-06-21 15:44:43,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462765598] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:43,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:43,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:44:43,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194733025] [2024-06-21 15:44:43,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:43,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:44:43,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:43,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:44:43,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:44:43,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 15:44:43,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 142 transitions, 1523 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-21 15:44:43,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:43,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 15:44:43,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:43,957 INFO L124 PetriNetUnfolderBase]: 1578/2746 cut-off events. [2024-06-21 15:44:43,957 INFO L125 PetriNetUnfolderBase]: For 123571/123575 co-relation queries the response was YES. [2024-06-21 15:44:43,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15366 conditions, 2746 events. 1578/2746 cut-off events. For 123571/123575 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 17069 event pairs, 558 based on Foata normal form. 38/2783 useless extension candidates. Maximal degree in co-relation 15276. Up to 2250 conditions per place. [2024-06-21 15:44:43,981 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 120 selfloop transitions, 25 changer transitions 7/159 dead transitions. [2024-06-21 15:44:43,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 159 transitions, 1895 flow [2024-06-21 15:44:43,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:44:43,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:44:43,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 155 transitions. [2024-06-21 15:44:43,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5677655677655677 [2024-06-21 15:44:43,982 INFO L175 Difference]: Start difference. First operand has 181 places, 142 transitions, 1523 flow. Second operand 7 states and 155 transitions. [2024-06-21 15:44:43,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 159 transitions, 1895 flow [2024-06-21 15:44:44,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 159 transitions, 1817 flow, removed 9 selfloop flow, removed 11 redundant places. [2024-06-21 15:44:44,108 INFO L231 Difference]: Finished difference. Result has 170 places, 137 transitions, 1441 flow [2024-06-21 15:44:44,108 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1445, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1441, PETRI_PLACES=170, PETRI_TRANSITIONS=137} [2024-06-21 15:44:44,108 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 130 predicate places. [2024-06-21 15:44:44,108 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 137 transitions, 1441 flow [2024-06-21 15:44:44,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-21 15:44:44,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:44,109 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] [2024-06-21 15:44:44,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-21 15:44:44,109 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:44,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:44,109 INFO L85 PathProgramCache]: Analyzing trace with hash 1206603085, now seen corresponding path program 1 times [2024-06-21 15:44:44,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:44,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896011780] [2024-06-21 15:44:44,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:44,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:44,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:44,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:44,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:44,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896011780] [2024-06-21 15:44:44,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896011780] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:44,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:44,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:44:44,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195851210] [2024-06-21 15:44:44,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:44,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:44:44,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:44,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:44:44,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:44:44,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 15:44:44,234 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 137 transitions, 1441 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:44,234 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:44,234 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 15:44:44,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:44,490 INFO L124 PetriNetUnfolderBase]: 1381/2415 cut-off events. [2024-06-21 15:44:44,491 INFO L125 PetriNetUnfolderBase]: For 74635/74639 co-relation queries the response was YES. [2024-06-21 15:44:44,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13388 conditions, 2415 events. 1381/2415 cut-off events. For 74635/74639 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 14524 event pairs, 363 based on Foata normal form. 10/2424 useless extension candidates. Maximal degree in co-relation 13304. Up to 1906 conditions per place. [2024-06-21 15:44:44,510 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 119 selfloop transitions, 31 changer transitions 0/157 dead transitions. [2024-06-21 15:44:44,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 157 transitions, 1817 flow [2024-06-21 15:44:44,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:44:44,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:44:44,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-06-21 15:44:44,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6068376068376068 [2024-06-21 15:44:44,511 INFO L175 Difference]: Start difference. First operand has 170 places, 137 transitions, 1441 flow. Second operand 6 states and 142 transitions. [2024-06-21 15:44:44,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 157 transitions, 1817 flow [2024-06-21 15:44:44,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 157 transitions, 1733 flow, removed 6 selfloop flow, removed 12 redundant places. [2024-06-21 15:44:44,633 INFO L231 Difference]: Finished difference. Result has 163 places, 137 transitions, 1425 flow [2024-06-21 15:44:44,633 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1357, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1425, PETRI_PLACES=163, PETRI_TRANSITIONS=137} [2024-06-21 15:44:44,633 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 123 predicate places. [2024-06-21 15:44:44,633 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 137 transitions, 1425 flow [2024-06-21 15:44:44,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:44,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:44,634 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] [2024-06-21 15:44:44,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-21 15:44:44,634 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:44,634 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:44,634 INFO L85 PathProgramCache]: Analyzing trace with hash 352485537, now seen corresponding path program 1 times [2024-06-21 15:44:44,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:44,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756124502] [2024-06-21 15:44:44,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:44,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:44,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:44,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:44,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:44,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756124502] [2024-06-21 15:44:44,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756124502] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:44,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:44,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:44:44,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138850569] [2024-06-21 15:44:44,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:44,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:44:44,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:44,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:44:44,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:44:44,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 15:44:44,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 137 transitions, 1425 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-21 15:44:44,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:44,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 15:44:44,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:45,095 INFO L124 PetriNetUnfolderBase]: 1485/2607 cut-off events. [2024-06-21 15:44:45,095 INFO L125 PetriNetUnfolderBase]: For 91222/91226 co-relation queries the response was YES. [2024-06-21 15:44:45,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14125 conditions, 2607 events. 1485/2607 cut-off events. For 91222/91226 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 16099 event pairs, 379 based on Foata normal form. 34/2640 useless extension candidates. Maximal degree in co-relation 14044. Up to 2003 conditions per place. [2024-06-21 15:44:45,115 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 122 selfloop transitions, 32 changer transitions 5/166 dead transitions. [2024-06-21 15:44:45,116 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 166 transitions, 1936 flow [2024-06-21 15:44:45,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:44:45,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:44:45,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 179 transitions. [2024-06-21 15:44:45,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5737179487179487 [2024-06-21 15:44:45,117 INFO L175 Difference]: Start difference. First operand has 163 places, 137 transitions, 1425 flow. Second operand 8 states and 179 transitions. [2024-06-21 15:44:45,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 166 transitions, 1936 flow [2024-06-21 15:44:45,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 166 transitions, 1839 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-21 15:44:45,272 INFO L231 Difference]: Finished difference. Result has 166 places, 140 transitions, 1479 flow [2024-06-21 15:44:45,272 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1337, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1479, PETRI_PLACES=166, PETRI_TRANSITIONS=140} [2024-06-21 15:44:45,272 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 126 predicate places. [2024-06-21 15:44:45,273 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 140 transitions, 1479 flow [2024-06-21 15:44:45,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-21 15:44:45,273 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:45,273 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] [2024-06-21 15:44:45,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-21 15:44:45,273 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:45,273 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:45,274 INFO L85 PathProgramCache]: Analyzing trace with hash -964200035, now seen corresponding path program 2 times [2024-06-21 15:44:45,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:45,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739972693] [2024-06-21 15:44:45,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:45,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:45,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:45,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:45,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:45,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739972693] [2024-06-21 15:44:45,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739972693] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:45,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:45,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:44:45,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329892592] [2024-06-21 15:44:45,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:45,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:44:45,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:45,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:44:45,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:44:45,395 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 15:44:45,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 140 transitions, 1479 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-21 15:44:45,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:45,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 15:44:45,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:45,675 INFO L124 PetriNetUnfolderBase]: 1344/2312 cut-off events. [2024-06-21 15:44:45,675 INFO L125 PetriNetUnfolderBase]: For 67314/67316 co-relation queries the response was YES. [2024-06-21 15:44:45,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12760 conditions, 2312 events. 1344/2312 cut-off events. For 67314/67316 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 13521 event pairs, 415 based on Foata normal form. 10/2321 useless extension candidates. Maximal degree in co-relation 12678. Up to 1938 conditions per place. [2024-06-21 15:44:45,695 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 123 selfloop transitions, 22 changer transitions 9/161 dead transitions. [2024-06-21 15:44:45,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 161 transitions, 1951 flow [2024-06-21 15:44:45,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:44:45,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:44:45,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 173 transitions. [2024-06-21 15:44:45,696 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5544871794871795 [2024-06-21 15:44:45,696 INFO L175 Difference]: Start difference. First operand has 166 places, 140 transitions, 1479 flow. Second operand 8 states and 173 transitions. [2024-06-21 15:44:45,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 161 transitions, 1951 flow [2024-06-21 15:44:45,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 161 transitions, 1866 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-21 15:44:45,804 INFO L231 Difference]: Finished difference. Result has 167 places, 136 transitions, 1392 flow [2024-06-21 15:44:45,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1396, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1392, PETRI_PLACES=167, PETRI_TRANSITIONS=136} [2024-06-21 15:44:45,805 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 127 predicate places. [2024-06-21 15:44:45,805 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 136 transitions, 1392 flow [2024-06-21 15:44:45,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-21 15:44:45,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:45,805 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] [2024-06-21 15:44:45,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-21 15:44:45,805 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:45,806 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:45,806 INFO L85 PathProgramCache]: Analyzing trace with hash -971818595, now seen corresponding path program 3 times [2024-06-21 15:44:45,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:45,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364546016] [2024-06-21 15:44:45,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:45,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:45,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:45,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:45,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:45,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364546016] [2024-06-21 15:44:45,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364546016] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:45,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:45,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:44:45,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089971128] [2024-06-21 15:44:45,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:45,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:44:45,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:45,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:44:45,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:44:45,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 15:44:45,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 136 transitions, 1392 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-21 15:44:45,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:45,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 15:44:45,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:46,142 INFO L124 PetriNetUnfolderBase]: 1176/2026 cut-off events. [2024-06-21 15:44:46,142 INFO L125 PetriNetUnfolderBase]: For 59194/59196 co-relation queries the response was YES. [2024-06-21 15:44:46,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11019 conditions, 2026 events. 1176/2026 cut-off events. For 59194/59196 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 11478 event pairs, 349 based on Foata normal form. 10/2035 useless extension candidates. Maximal degree in co-relation 10938. Up to 1752 conditions per place. [2024-06-21 15:44:46,157 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 115 selfloop transitions, 18 changer transitions 12/152 dead transitions. [2024-06-21 15:44:46,158 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 152 transitions, 1738 flow [2024-06-21 15:44:46,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:44:46,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:44:46,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 166 transitions. [2024-06-21 15:44:46,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.532051282051282 [2024-06-21 15:44:46,159 INFO L175 Difference]: Start difference. First operand has 167 places, 136 transitions, 1392 flow. Second operand 8 states and 166 transitions. [2024-06-21 15:44:46,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 152 transitions, 1738 flow [2024-06-21 15:44:46,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 152 transitions, 1674 flow, removed 9 selfloop flow, removed 11 redundant places. [2024-06-21 15:44:46,232 INFO L231 Difference]: Finished difference. Result has 159 places, 131 transitions, 1315 flow [2024-06-21 15:44:46,233 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1328, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1315, PETRI_PLACES=159, PETRI_TRANSITIONS=131} [2024-06-21 15:44:46,233 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 119 predicate places. [2024-06-21 15:44:46,233 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 131 transitions, 1315 flow [2024-06-21 15:44:46,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-21 15:44:46,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:46,233 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] [2024-06-21 15:44:46,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-21 15:44:46,234 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:46,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:46,234 INFO L85 PathProgramCache]: Analyzing trace with hash -151962669, now seen corresponding path program 4 times [2024-06-21 15:44:46,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:46,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302420730] [2024-06-21 15:44:46,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:46,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:46,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:46,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:46,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:46,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302420730] [2024-06-21 15:44:46,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302420730] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:46,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:46,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:44:46,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003080508] [2024-06-21 15:44:46,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:46,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:44:46,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:46,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:44:46,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:44:46,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 15:44:46,370 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 131 transitions, 1315 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-21 15:44:46,370 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:46,370 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 15:44:46,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:46,592 INFO L124 PetriNetUnfolderBase]: 1094/1882 cut-off events. [2024-06-21 15:44:46,592 INFO L125 PetriNetUnfolderBase]: For 52306/52308 co-relation queries the response was YES. [2024-06-21 15:44:46,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10351 conditions, 1882 events. 1094/1882 cut-off events. For 52306/52308 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 10464 event pairs, 245 based on Foata normal form. 8/1889 useless extension candidates. Maximal degree in co-relation 10274. Up to 1556 conditions per place. [2024-06-21 15:44:46,605 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 115 selfloop transitions, 30 changer transitions 0/152 dead transitions. [2024-06-21 15:44:46,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 152 transitions, 1705 flow [2024-06-21 15:44:46,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:44:46,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:44:46,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 173 transitions. [2024-06-21 15:44:46,606 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5544871794871795 [2024-06-21 15:44:46,607 INFO L175 Difference]: Start difference. First operand has 159 places, 131 transitions, 1315 flow. Second operand 8 states and 173 transitions. [2024-06-21 15:44:46,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 152 transitions, 1705 flow [2024-06-21 15:44:46,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 152 transitions, 1624 flow, removed 17 selfloop flow, removed 11 redundant places. [2024-06-21 15:44:46,670 INFO L231 Difference]: Finished difference. Result has 148 places, 132 transitions, 1332 flow [2024-06-21 15:44:46,670 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1246, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1332, PETRI_PLACES=148, PETRI_TRANSITIONS=132} [2024-06-21 15:44:46,670 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 108 predicate places. [2024-06-21 15:44:46,670 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 132 transitions, 1332 flow [2024-06-21 15:44:46,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-21 15:44:46,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:46,671 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] [2024-06-21 15:44:46,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-21 15:44:46,671 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:46,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:46,671 INFO L85 PathProgramCache]: Analyzing trace with hash -152082639, now seen corresponding path program 5 times [2024-06-21 15:44:46,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:46,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231428505] [2024-06-21 15:44:46,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:46,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:46,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:46,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:46,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:46,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231428505] [2024-06-21 15:44:46,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231428505] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:46,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:46,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:44:46,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805008297] [2024-06-21 15:44:46,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:46,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:44:46,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:46,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:44:46,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:44:46,804 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 15:44:46,804 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 132 transitions, 1332 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-21 15:44:46,805 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:46,805 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 15:44:46,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:47,064 INFO L124 PetriNetUnfolderBase]: 1114/1914 cut-off events. [2024-06-21 15:44:47,064 INFO L125 PetriNetUnfolderBase]: For 42566/42568 co-relation queries the response was YES. [2024-06-21 15:44:47,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10046 conditions, 1914 events. 1114/1914 cut-off events. For 42566/42568 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 10679 event pairs, 248 based on Foata normal form. 8/1921 useless extension candidates. Maximal degree in co-relation 9975. Up to 1508 conditions per place. [2024-06-21 15:44:47,082 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 116 selfloop transitions, 32 changer transitions 0/155 dead transitions. [2024-06-21 15:44:47,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 155 transitions, 1730 flow [2024-06-21 15:44:47,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:44:47,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:44:47,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 174 transitions. [2024-06-21 15:44:47,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5576923076923077 [2024-06-21 15:44:47,083 INFO L175 Difference]: Start difference. First operand has 148 places, 132 transitions, 1332 flow. Second operand 8 states and 174 transitions. [2024-06-21 15:44:47,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 155 transitions, 1730 flow [2024-06-21 15:44:47,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 155 transitions, 1622 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-21 15:44:47,133 INFO L231 Difference]: Finished difference. Result has 149 places, 133 transitions, 1316 flow [2024-06-21 15:44:47,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1224, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1316, PETRI_PLACES=149, PETRI_TRANSITIONS=133} [2024-06-21 15:44:47,134 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 109 predicate places. [2024-06-21 15:44:47,134 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 133 transitions, 1316 flow [2024-06-21 15:44:47,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-21 15:44:47,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:47,134 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] [2024-06-21 15:44:47,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-21 15:44:47,135 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:47,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:47,135 INFO L85 PathProgramCache]: Analyzing trace with hash 1011934327, now seen corresponding path program 2 times [2024-06-21 15:44:47,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:47,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833758074] [2024-06-21 15:44:47,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:47,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:47,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:47,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:47,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:47,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833758074] [2024-06-21 15:44:47,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833758074] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:47,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:47,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:44:47,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038991094] [2024-06-21 15:44:47,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:47,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:44:47,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:47,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:44:47,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:44:47,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 15:44:47,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 133 transitions, 1316 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-21 15:44:47,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:47,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 15:44:47,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:47,500 INFO L124 PetriNetUnfolderBase]: 1134/1940 cut-off events. [2024-06-21 15:44:47,500 INFO L125 PetriNetUnfolderBase]: For 44816/44818 co-relation queries the response was YES. [2024-06-21 15:44:47,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10182 conditions, 1940 events. 1134/1940 cut-off events. For 44816/44818 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 10855 event pairs, 330 based on Foata normal form. 8/1937 useless extension candidates. Maximal degree in co-relation 10111. Up to 1598 conditions per place. [2024-06-21 15:44:47,513 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 122 selfloop transitions, 31 changer transitions 0/160 dead transitions. [2024-06-21 15:44:47,513 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 160 transitions, 1794 flow [2024-06-21 15:44:47,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:44:47,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:44:47,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 181 transitions. [2024-06-21 15:44:47,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5801282051282052 [2024-06-21 15:44:47,514 INFO L175 Difference]: Start difference. First operand has 149 places, 133 transitions, 1316 flow. Second operand 8 states and 181 transitions. [2024-06-21 15:44:47,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 160 transitions, 1794 flow [2024-06-21 15:44:47,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 160 transitions, 1714 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-21 15:44:47,568 INFO L231 Difference]: Finished difference. Result has 151 places, 134 transitions, 1324 flow [2024-06-21 15:44:47,569 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1236, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1324, PETRI_PLACES=151, PETRI_TRANSITIONS=134} [2024-06-21 15:44:47,569 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 111 predicate places. [2024-06-21 15:44:47,569 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 134 transitions, 1324 flow [2024-06-21 15:44:47,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-21 15:44:47,569 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:47,569 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] [2024-06-21 15:44:47,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-21 15:44:47,570 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:47,570 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:47,570 INFO L85 PathProgramCache]: Analyzing trace with hash -1664563645, now seen corresponding path program 3 times [2024-06-21 15:44:47,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:47,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267684505] [2024-06-21 15:44:47,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:47,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:47,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:47,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:47,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:47,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267684505] [2024-06-21 15:44:47,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267684505] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:47,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:47,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:44:47,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468367441] [2024-06-21 15:44:47,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:47,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:44:47,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:47,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:44:47,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:44:47,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 15:44:47,692 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 134 transitions, 1324 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-21 15:44:47,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:47,692 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 15:44:47,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:47,906 INFO L124 PetriNetUnfolderBase]: 1116/1927 cut-off events. [2024-06-21 15:44:47,906 INFO L125 PetriNetUnfolderBase]: For 42785/42787 co-relation queries the response was YES. [2024-06-21 15:44:47,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9754 conditions, 1927 events. 1116/1927 cut-off events. For 42785/42787 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 10839 event pairs, 341 based on Foata normal form. 10/1931 useless extension candidates. Maximal degree in co-relation 9682. Up to 1632 conditions per place. [2024-06-21 15:44:47,919 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 117 selfloop transitions, 28 changer transitions 0/152 dead transitions. [2024-06-21 15:44:47,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 152 transitions, 1672 flow [2024-06-21 15:44:47,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:44:47,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:44:47,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 157 transitions. [2024-06-21 15:44:47,920 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575091575091575 [2024-06-21 15:44:47,920 INFO L175 Difference]: Start difference. First operand has 151 places, 134 transitions, 1324 flow. Second operand 7 states and 157 transitions. [2024-06-21 15:44:47,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 152 transitions, 1672 flow [2024-06-21 15:44:47,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 152 transitions, 1592 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-21 15:44:47,964 INFO L231 Difference]: Finished difference. Result has 153 places, 134 transitions, 1305 flow [2024-06-21 15:44:47,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1244, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1305, PETRI_PLACES=153, PETRI_TRANSITIONS=134} [2024-06-21 15:44:47,964 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 113 predicate places. [2024-06-21 15:44:47,965 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 134 transitions, 1305 flow [2024-06-21 15:44:47,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-21 15:44:47,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:47,965 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] [2024-06-21 15:44:47,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-21 15:44:47,965 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:47,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:47,965 INFO L85 PathProgramCache]: Analyzing trace with hash 658615415, now seen corresponding path program 4 times [2024-06-21 15:44:47,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:47,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209141764] [2024-06-21 15:44:47,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:47,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:47,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:48,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:48,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:48,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209141764] [2024-06-21 15:44:48,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209141764] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:48,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:48,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:44:48,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562530324] [2024-06-21 15:44:48,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:48,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:44:48,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:48,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:44:48,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:44:48,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 15:44:48,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 134 transitions, 1305 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-21 15:44:48,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:48,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 15:44:48,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:48,338 INFO L124 PetriNetUnfolderBase]: 1136/1962 cut-off events. [2024-06-21 15:44:48,338 INFO L125 PetriNetUnfolderBase]: For 42947/42949 co-relation queries the response was YES. [2024-06-21 15:44:48,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9835 conditions, 1962 events. 1136/1962 cut-off events. For 42947/42949 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 11062 event pairs, 248 based on Foata normal form. 8/1963 useless extension candidates. Maximal degree in co-relation 9762. Up to 1545 conditions per place. [2024-06-21 15:44:48,352 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 118 selfloop transitions, 36 changer transitions 0/161 dead transitions. [2024-06-21 15:44:48,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 161 transitions, 1791 flow [2024-06-21 15:44:48,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:44:48,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:44:48,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-21 15:44:48,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6007326007326007 [2024-06-21 15:44:48,353 INFO L175 Difference]: Start difference. First operand has 153 places, 134 transitions, 1305 flow. Second operand 7 states and 164 transitions. [2024-06-21 15:44:48,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 161 transitions, 1791 flow [2024-06-21 15:44:48,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 161 transitions, 1708 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-21 15:44:48,405 INFO L231 Difference]: Finished difference. Result has 153 places, 135 transitions, 1322 flow [2024-06-21 15:44:48,405 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1222, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1322, PETRI_PLACES=153, PETRI_TRANSITIONS=135} [2024-06-21 15:44:48,406 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 113 predicate places. [2024-06-21 15:44:48,406 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 135 transitions, 1322 flow [2024-06-21 15:44:48,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-21 15:44:48,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:48,406 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] [2024-06-21 15:44:48,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-21 15:44:48,406 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:48,407 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:48,407 INFO L85 PathProgramCache]: Analyzing trace with hash 670043255, now seen corresponding path program 5 times [2024-06-21 15:44:48,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:48,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547608468] [2024-06-21 15:44:48,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:48,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:48,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:48,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:48,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:48,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547608468] [2024-06-21 15:44:48,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547608468] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:48,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:48,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:44:48,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38823226] [2024-06-21 15:44:48,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:48,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:44:48,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:48,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:44:48,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:44:48,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 15:44:48,522 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 135 transitions, 1322 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:48,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:48,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 15:44:48,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:48,744 INFO L124 PetriNetUnfolderBase]: 1143/1973 cut-off events. [2024-06-21 15:44:48,745 INFO L125 PetriNetUnfolderBase]: For 44252/44252 co-relation queries the response was YES. [2024-06-21 15:44:48,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9972 conditions, 1973 events. 1143/1973 cut-off events. For 44252/44252 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 11147 event pairs, 210 based on Foata normal form. 6/1972 useless extension candidates. Maximal degree in co-relation 9898. Up to 1125 conditions per place. [2024-06-21 15:44:48,762 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 106 selfloop transitions, 44 changer transitions 0/157 dead transitions. [2024-06-21 15:44:48,762 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 157 transitions, 1798 flow [2024-06-21 15:44:48,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:44:48,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:44:48,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 140 transitions. [2024-06-21 15:44:48,763 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5982905982905983 [2024-06-21 15:44:48,763 INFO L175 Difference]: Start difference. First operand has 153 places, 135 transitions, 1322 flow. Second operand 6 states and 140 transitions. [2024-06-21 15:44:48,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 157 transitions, 1798 flow [2024-06-21 15:44:48,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 157 transitions, 1710 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-21 15:44:48,818 INFO L231 Difference]: Finished difference. Result has 154 places, 136 transitions, 1350 flow [2024-06-21 15:44:48,818 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1234, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1350, PETRI_PLACES=154, PETRI_TRANSITIONS=136} [2024-06-21 15:44:48,819 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 114 predicate places. [2024-06-21 15:44:48,819 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 136 transitions, 1350 flow [2024-06-21 15:44:48,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:48,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:48,819 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] [2024-06-21 15:44:48,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-21 15:44:48,819 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:48,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:48,820 INFO L85 PathProgramCache]: Analyzing trace with hash 40979609, now seen corresponding path program 6 times [2024-06-21 15:44:48,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:48,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617396356] [2024-06-21 15:44:48,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:48,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:48,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:48,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:48,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:48,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617396356] [2024-06-21 15:44:48,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617396356] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:48,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:48,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:44:48,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830885669] [2024-06-21 15:44:48,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:48,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:44:48,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:48,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:44:48,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:44:48,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 15:44:48,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 136 transitions, 1350 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-21 15:44:48,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:48,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 15:44:48,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:49,180 INFO L124 PetriNetUnfolderBase]: 1125/1942 cut-off events. [2024-06-21 15:44:49,181 INFO L125 PetriNetUnfolderBase]: For 41797/41797 co-relation queries the response was YES. [2024-06-21 15:44:49,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9632 conditions, 1942 events. 1125/1942 cut-off events. For 41797/41797 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 10971 event pairs, 346 based on Foata normal form. 8/1948 useless extension candidates. Maximal degree in co-relation 9557. Up to 1651 conditions per place. [2024-06-21 15:44:49,199 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 110 selfloop transitions, 31 changer transitions 0/148 dead transitions. [2024-06-21 15:44:49,199 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 148 transitions, 1674 flow [2024-06-21 15:44:49,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:44:49,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:44:49,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 152 transitions. [2024-06-21 15:44:49,200 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5567765567765568 [2024-06-21 15:44:49,200 INFO L175 Difference]: Start difference. First operand has 154 places, 136 transitions, 1350 flow. Second operand 7 states and 152 transitions. [2024-06-21 15:44:49,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 148 transitions, 1674 flow [2024-06-21 15:44:49,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 148 transitions, 1599 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-21 15:44:49,279 INFO L231 Difference]: Finished difference. Result has 158 places, 136 transitions, 1342 flow [2024-06-21 15:44:49,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1275, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1342, PETRI_PLACES=158, PETRI_TRANSITIONS=136} [2024-06-21 15:44:49,279 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 118 predicate places. [2024-06-21 15:44:49,279 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 136 transitions, 1342 flow [2024-06-21 15:44:49,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-21 15:44:49,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:49,280 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] [2024-06-21 15:44:49,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-21 15:44:49,280 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:49,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:49,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1522335277, now seen corresponding path program 6 times [2024-06-21 15:44:49,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:49,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473171215] [2024-06-21 15:44:49,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:49,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:49,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:49,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:49,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:49,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473171215] [2024-06-21 15:44:49,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473171215] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:49,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:49,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:44:49,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696006023] [2024-06-21 15:44:49,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:49,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:44:49,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:49,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:44:49,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:44:49,380 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 15:44:49,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 136 transitions, 1342 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-21 15:44:49,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:49,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 15:44:49,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:49,597 INFO L124 PetriNetUnfolderBase]: 1229/2117 cut-off events. [2024-06-21 15:44:49,597 INFO L125 PetriNetUnfolderBase]: For 64431/64431 co-relation queries the response was YES. [2024-06-21 15:44:49,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10163 conditions, 2117 events. 1229/2117 cut-off events. For 64431/64431 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 12239 event pairs, 389 based on Foata normal form. 34/2149 useless extension candidates. Maximal degree in co-relation 10087. Up to 1627 conditions per place. [2024-06-21 15:44:49,614 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 93 selfloop transitions, 53 changer transitions 3/156 dead transitions. [2024-06-21 15:44:49,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 156 transitions, 1730 flow [2024-06-21 15:44:49,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 15:44:49,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 15:44:49,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 198 transitions. [2024-06-21 15:44:49,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5641025641025641 [2024-06-21 15:44:49,615 INFO L175 Difference]: Start difference. First operand has 158 places, 136 transitions, 1342 flow. Second operand 9 states and 198 transitions. [2024-06-21 15:44:49,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 156 transitions, 1730 flow [2024-06-21 15:44:49,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 156 transitions, 1655 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-21 15:44:49,680 INFO L231 Difference]: Finished difference. Result has 161 places, 136 transitions, 1400 flow [2024-06-21 15:44:49,680 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1267, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1400, PETRI_PLACES=161, PETRI_TRANSITIONS=136} [2024-06-21 15:44:49,680 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 121 predicate places. [2024-06-21 15:44:49,681 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 136 transitions, 1400 flow [2024-06-21 15:44:49,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-21 15:44:49,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:49,681 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] [2024-06-21 15:44:49,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-21 15:44:49,681 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:49,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:49,682 INFO L85 PathProgramCache]: Analyzing trace with hash -1990008387, now seen corresponding path program 2 times [2024-06-21 15:44:49,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:49,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233668040] [2024-06-21 15:44:49,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:49,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:49,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:49,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:49,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:49,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233668040] [2024-06-21 15:44:49,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233668040] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:49,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:49,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:44:49,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881019424] [2024-06-21 15:44:49,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:49,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:44:49,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:49,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:44:49,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:44:49,812 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 15:44:49,813 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 136 transitions, 1400 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-21 15:44:49,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:49,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 15:44:49,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:50,048 INFO L124 PetriNetUnfolderBase]: 1239/2132 cut-off events. [2024-06-21 15:44:50,048 INFO L125 PetriNetUnfolderBase]: For 45361/45361 co-relation queries the response was YES. [2024-06-21 15:44:50,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10422 conditions, 2132 events. 1239/2132 cut-off events. For 45361/45361 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 12264 event pairs, 392 based on Foata normal form. 6/2136 useless extension candidates. Maximal degree in co-relation 10345. Up to 1769 conditions per place. [2024-06-21 15:44:50,065 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 111 selfloop transitions, 35 changer transitions 0/153 dead transitions. [2024-06-21 15:44:50,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 153 transitions, 1775 flow [2024-06-21 15:44:50,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:44:50,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:44:50,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 173 transitions. [2024-06-21 15:44:50,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5544871794871795 [2024-06-21 15:44:50,066 INFO L175 Difference]: Start difference. First operand has 161 places, 136 transitions, 1400 flow. Second operand 8 states and 173 transitions. [2024-06-21 15:44:50,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 153 transitions, 1775 flow [2024-06-21 15:44:50,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 153 transitions, 1655 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-21 15:44:50,138 INFO L231 Difference]: Finished difference. Result has 162 places, 137 transitions, 1381 flow [2024-06-21 15:44:50,138 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1280, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1381, PETRI_PLACES=162, PETRI_TRANSITIONS=137} [2024-06-21 15:44:50,139 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 122 predicate places. [2024-06-21 15:44:50,139 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 137 transitions, 1381 flow [2024-06-21 15:44:50,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-21 15:44:50,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:50,139 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:44:50,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-21 15:44:50,140 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:50,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:50,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1590511263, now seen corresponding path program 7 times [2024-06-21 15:44:50,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:50,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401775206] [2024-06-21 15:44:50,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:50,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:50,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:50,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:50,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:50,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401775206] [2024-06-21 15:44:50,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401775206] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:50,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:50,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:44:50,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127853563] [2024-06-21 15:44:50,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:50,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:44:50,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:50,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:44:50,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:44:50,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 15:44:50,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 137 transitions, 1381 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-21 15:44:50,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:50,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 15:44:50,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:50,579 INFO L124 PetriNetUnfolderBase]: 1335/2313 cut-off events. [2024-06-21 15:44:50,580 INFO L125 PetriNetUnfolderBase]: For 67621/67621 co-relation queries the response was YES. [2024-06-21 15:44:50,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11010 conditions, 2313 events. 1335/2313 cut-off events. For 67621/67621 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 13649 event pairs, 395 based on Foata normal form. 30/2341 useless extension candidates. Maximal degree in co-relation 10932. Up to 1595 conditions per place. [2024-06-21 15:44:50,598 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 95 selfloop transitions, 58 changer transitions 6/166 dead transitions. [2024-06-21 15:44:50,599 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 166 transitions, 1849 flow [2024-06-21 15:44:50,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 15:44:50,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 15:44:50,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 221 transitions. [2024-06-21 15:44:50,600 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5666666666666667 [2024-06-21 15:44:50,600 INFO L175 Difference]: Start difference. First operand has 162 places, 137 transitions, 1381 flow. Second operand 10 states and 221 transitions. [2024-06-21 15:44:50,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 166 transitions, 1849 flow [2024-06-21 15:44:50,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 166 transitions, 1758 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-21 15:44:50,680 INFO L231 Difference]: Finished difference. Result has 167 places, 139 transitions, 1464 flow [2024-06-21 15:44:50,680 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1293, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1464, PETRI_PLACES=167, PETRI_TRANSITIONS=139} [2024-06-21 15:44:50,681 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 127 predicate places. [2024-06-21 15:44:50,681 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 139 transitions, 1464 flow [2024-06-21 15:44:50,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-21 15:44:50,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:50,681 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] [2024-06-21 15:44:50,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-21 15:44:50,681 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:50,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:50,682 INFO L85 PathProgramCache]: Analyzing trace with hash -1763350785, now seen corresponding path program 3 times [2024-06-21 15:44:50,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:50,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486648655] [2024-06-21 15:44:50,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:50,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:50,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:50,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:50,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:50,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486648655] [2024-06-21 15:44:50,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486648655] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:50,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:50,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:44:50,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851488171] [2024-06-21 15:44:50,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:50,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:44:50,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:50,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:44:50,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:44:50,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 15:44:50,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 139 transitions, 1464 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:50,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:50,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 15:44:50,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:51,015 INFO L124 PetriNetUnfolderBase]: 1325/2293 cut-off events. [2024-06-21 15:44:51,016 INFO L125 PetriNetUnfolderBase]: For 50156/50156 co-relation queries the response was YES. [2024-06-21 15:44:51,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11140 conditions, 2293 events. 1325/2293 cut-off events. For 50156/50156 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 13418 event pairs, 261 based on Foata normal form. 6/2292 useless extension candidates. Maximal degree in co-relation 11060. Up to 1415 conditions per place. [2024-06-21 15:44:51,040 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 105 selfloop transitions, 49 changer transitions 0/161 dead transitions. [2024-06-21 15:44:51,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 161 transitions, 1961 flow [2024-06-21 15:44:51,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:44:51,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:44:51,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 140 transitions. [2024-06-21 15:44:51,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5982905982905983 [2024-06-21 15:44:51,041 INFO L175 Difference]: Start difference. First operand has 167 places, 139 transitions, 1464 flow. Second operand 6 states and 140 transitions. [2024-06-21 15:44:51,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 161 transitions, 1961 flow [2024-06-21 15:44:51,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 161 transitions, 1831 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-21 15:44:51,106 INFO L231 Difference]: Finished difference. Result has 165 places, 140 transitions, 1465 flow [2024-06-21 15:44:51,106 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1336, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1465, PETRI_PLACES=165, PETRI_TRANSITIONS=140} [2024-06-21 15:44:51,106 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 125 predicate places. [2024-06-21 15:44:51,106 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 140 transitions, 1465 flow [2024-06-21 15:44:51,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:51,107 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:51,107 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] [2024-06-21 15:44:51,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-21 15:44:51,107 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:51,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:51,107 INFO L85 PathProgramCache]: Analyzing trace with hash 454470939, now seen corresponding path program 4 times [2024-06-21 15:44:51,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:51,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071898617] [2024-06-21 15:44:51,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:51,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:51,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:51,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:51,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:51,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071898617] [2024-06-21 15:44:51,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071898617] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:51,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:51,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:44:51,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833021866] [2024-06-21 15:44:51,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:51,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:44:51,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:51,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:44:51,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:44:51,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 15:44:51,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 140 transitions, 1465 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-21 15:44:51,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:51,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 15:44:51,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:51,502 INFO L124 PetriNetUnfolderBase]: 1312/2282 cut-off events. [2024-06-21 15:44:51,502 INFO L125 PetriNetUnfolderBase]: For 44443/44443 co-relation queries the response was YES. [2024-06-21 15:44:51,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10782 conditions, 2282 events. 1312/2282 cut-off events. For 44443/44443 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 13400 event pairs, 324 based on Foata normal form. 6/2286 useless extension candidates. Maximal degree in co-relation 10702. Up to 1762 conditions per place. [2024-06-21 15:44:51,522 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 105 selfloop transitions, 47 changer transitions 0/159 dead transitions. [2024-06-21 15:44:51,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 159 transitions, 1849 flow [2024-06-21 15:44:51,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:44:51,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:44:51,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 160 transitions. [2024-06-21 15:44:51,523 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5860805860805861 [2024-06-21 15:44:51,523 INFO L175 Difference]: Start difference. First operand has 165 places, 140 transitions, 1465 flow. Second operand 7 states and 160 transitions. [2024-06-21 15:44:51,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 159 transitions, 1849 flow [2024-06-21 15:44:51,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 159 transitions, 1639 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-21 15:44:51,608 INFO L231 Difference]: Finished difference. Result has 166 places, 140 transitions, 1353 flow [2024-06-21 15:44:51,609 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1255, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1353, PETRI_PLACES=166, PETRI_TRANSITIONS=140} [2024-06-21 15:44:51,609 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 126 predicate places. [2024-06-21 15:44:51,609 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 140 transitions, 1353 flow [2024-06-21 15:44:51,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-21 15:44:51,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:51,610 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] [2024-06-21 15:44:51,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-21 15:44:51,610 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:51,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:51,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1576701693, now seen corresponding path program 8 times [2024-06-21 15:44:51,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:51,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934222251] [2024-06-21 15:44:51,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:51,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:51,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:51,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:51,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:51,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934222251] [2024-06-21 15:44:51,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934222251] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:51,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:51,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:44:51,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329903760] [2024-06-21 15:44:51,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:51,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:44:51,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:51,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:44:51,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:44:51,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 15:44:51,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 140 transitions, 1353 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-21 15:44:51,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:51,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 15:44:51,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:52,079 INFO L124 PetriNetUnfolderBase]: 1535/2663 cut-off events. [2024-06-21 15:44:52,079 INFO L125 PetriNetUnfolderBase]: For 92055/92055 co-relation queries the response was YES. [2024-06-21 15:44:52,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12761 conditions, 2663 events. 1535/2663 cut-off events. For 92055/92055 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 16144 event pairs, 429 based on Foata normal form. 30/2691 useless extension candidates. Maximal degree in co-relation 12682. Up to 1364 conditions per place. [2024-06-21 15:44:52,101 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 93 selfloop transitions, 65 changer transitions 8/173 dead transitions. [2024-06-21 15:44:52,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 173 transitions, 1945 flow [2024-06-21 15:44:52,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 15:44:52,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 15:44:52,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 208 transitions. [2024-06-21 15:44:52,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5925925925925926 [2024-06-21 15:44:52,102 INFO L175 Difference]: Start difference. First operand has 166 places, 140 transitions, 1353 flow. Second operand 9 states and 208 transitions. [2024-06-21 15:44:52,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 173 transitions, 1945 flow [2024-06-21 15:44:52,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 173 transitions, 1818 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-21 15:44:52,220 INFO L231 Difference]: Finished difference. Result has 169 places, 141 transitions, 1390 flow [2024-06-21 15:44:52,220 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1230, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1390, PETRI_PLACES=169, PETRI_TRANSITIONS=141} [2024-06-21 15:44:52,220 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 129 predicate places. [2024-06-21 15:44:52,220 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 141 transitions, 1390 flow [2024-06-21 15:44:52,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-21 15:44:52,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:52,221 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] [2024-06-21 15:44:52,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-21 15:44:52,221 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:52,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:52,221 INFO L85 PathProgramCache]: Analyzing trace with hash 1046672147, now seen corresponding path program 9 times [2024-06-21 15:44:52,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:52,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841904197] [2024-06-21 15:44:52,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:52,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:52,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:52,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:52,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:52,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841904197] [2024-06-21 15:44:52,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841904197] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:52,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:52,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:44:52,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422054709] [2024-06-21 15:44:52,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:52,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:44:52,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:52,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:44:52,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:44:52,346 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 15:44:52,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 141 transitions, 1390 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-21 15:44:52,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:52,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 15:44:52,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:52,612 INFO L124 PetriNetUnfolderBase]: 1348/2310 cut-off events. [2024-06-21 15:44:52,612 INFO L125 PetriNetUnfolderBase]: For 86167/86167 co-relation queries the response was YES. [2024-06-21 15:44:52,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12557 conditions, 2310 events. 1348/2310 cut-off events. For 86167/86167 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 13410 event pairs, 451 based on Foata normal form. 6/2314 useless extension candidates. Maximal degree in co-relation 12477. Up to 1750 conditions per place. [2024-06-21 15:44:52,632 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 99 selfloop transitions, 59 changer transitions 0/165 dead transitions. [2024-06-21 15:44:52,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 165 transitions, 2048 flow [2024-06-21 15:44:52,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:44:52,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:44:52,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2024-06-21 15:44:52,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5769230769230769 [2024-06-21 15:44:52,634 INFO L175 Difference]: Start difference. First operand has 169 places, 141 transitions, 1390 flow. Second operand 8 states and 180 transitions. [2024-06-21 15:44:52,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 165 transitions, 2048 flow [2024-06-21 15:44:52,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 165 transitions, 1880 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-06-21 15:44:52,736 INFO L231 Difference]: Finished difference. Result has 170 places, 144 transitions, 1440 flow [2024-06-21 15:44:52,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1226, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1440, PETRI_PLACES=170, PETRI_TRANSITIONS=144} [2024-06-21 15:44:52,737 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 130 predicate places. [2024-06-21 15:44:52,737 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 144 transitions, 1440 flow [2024-06-21 15:44:52,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-21 15:44:52,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:52,737 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] [2024-06-21 15:44:52,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-21 15:44:52,738 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:52,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:52,738 INFO L85 PathProgramCache]: Analyzing trace with hash -2054732605, now seen corresponding path program 10 times [2024-06-21 15:44:52,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:52,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927924286] [2024-06-21 15:44:52,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:52,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:52,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:52,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:52,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:52,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927924286] [2024-06-21 15:44:52,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927924286] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:52,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:52,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:44:52,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74062560] [2024-06-21 15:44:52,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:52,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:44:52,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:52,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:44:52,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:44:52,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 15:44:52,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 144 transitions, 1440 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-21 15:44:52,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:52,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 15:44:52,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:53,093 INFO L124 PetriNetUnfolderBase]: 1208/2096 cut-off events. [2024-06-21 15:44:53,094 INFO L125 PetriNetUnfolderBase]: For 54207/54207 co-relation queries the response was YES. [2024-06-21 15:44:53,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10146 conditions, 2096 events. 1208/2096 cut-off events. For 54207/54207 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 12086 event pairs, 383 based on Foata normal form. 6/2100 useless extension candidates. Maximal degree in co-relation 10066. Up to 1782 conditions per place. [2024-06-21 15:44:53,114 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 117 selfloop transitions, 34 changer transitions 0/158 dead transitions. [2024-06-21 15:44:53,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 158 transitions, 1780 flow [2024-06-21 15:44:53,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:44:53,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:44:53,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 170 transitions. [2024-06-21 15:44:53,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5448717948717948 [2024-06-21 15:44:53,115 INFO L175 Difference]: Start difference. First operand has 170 places, 144 transitions, 1440 flow. Second operand 8 states and 170 transitions. [2024-06-21 15:44:53,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 158 transitions, 1780 flow [2024-06-21 15:44:53,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 158 transitions, 1631 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-21 15:44:53,199 INFO L231 Difference]: Finished difference. Result has 173 places, 144 transitions, 1363 flow [2024-06-21 15:44:53,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1291, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1363, PETRI_PLACES=173, PETRI_TRANSITIONS=144} [2024-06-21 15:44:53,200 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 133 predicate places. [2024-06-21 15:44:53,200 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 144 transitions, 1363 flow [2024-06-21 15:44:53,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-21 15:44:53,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:53,200 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] [2024-06-21 15:44:53,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-21 15:44:53,200 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:53,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:53,201 INFO L85 PathProgramCache]: Analyzing trace with hash -1354210083, now seen corresponding path program 11 times [2024-06-21 15:44:53,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:53,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534804998] [2024-06-21 15:44:53,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:53,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:53,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:53,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:53,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:53,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534804998] [2024-06-21 15:44:53,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534804998] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:53,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:53,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:44:53,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255048499] [2024-06-21 15:44:53,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:53,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:44:53,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:53,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:44:53,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:44:53,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 15:44:53,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 144 transitions, 1363 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-21 15:44:53,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:53,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 15:44:53,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:53,537 INFO L124 PetriNetUnfolderBase]: 1236/2144 cut-off events. [2024-06-21 15:44:53,537 INFO L125 PetriNetUnfolderBase]: For 55882/55882 co-relation queries the response was YES. [2024-06-21 15:44:53,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10166 conditions, 2144 events. 1236/2144 cut-off events. For 55882/55882 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 12402 event pairs, 420 based on Foata normal form. 8/2150 useless extension candidates. Maximal degree in co-relation 10086. Up to 1805 conditions per place. [2024-06-21 15:44:53,555 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 99 selfloop transitions, 52 changer transitions 0/158 dead transitions. [2024-06-21 15:44:53,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 158 transitions, 1737 flow [2024-06-21 15:44:53,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:44:53,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:44:53,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 173 transitions. [2024-06-21 15:44:53,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5544871794871795 [2024-06-21 15:44:53,556 INFO L175 Difference]: Start difference. First operand has 173 places, 144 transitions, 1363 flow. Second operand 8 states and 173 transitions. [2024-06-21 15:44:53,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 158 transitions, 1737 flow [2024-06-21 15:44:53,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 158 transitions, 1635 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-21 15:44:53,644 INFO L231 Difference]: Finished difference. Result has 173 places, 145 transitions, 1400 flow [2024-06-21 15:44:53,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1261, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1400, PETRI_PLACES=173, PETRI_TRANSITIONS=145} [2024-06-21 15:44:53,644 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 133 predicate places. [2024-06-21 15:44:53,644 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 145 transitions, 1400 flow [2024-06-21 15:44:53,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-21 15:44:53,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:53,645 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] [2024-06-21 15:44:53,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-21 15:44:53,645 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:53,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:53,645 INFO L85 PathProgramCache]: Analyzing trace with hash 1896028671, now seen corresponding path program 12 times [2024-06-21 15:44:53,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:53,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347918926] [2024-06-21 15:44:53,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:53,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:53,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:53,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:53,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:53,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347918926] [2024-06-21 15:44:53,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347918926] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:53,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:53,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:44:53,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429911744] [2024-06-21 15:44:53,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:53,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:44:53,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:53,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:44:53,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:44:53,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 15:44:53,758 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 145 transitions, 1400 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-21 15:44:53,758 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:53,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 15:44:53,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:54,014 INFO L124 PetriNetUnfolderBase]: 1218/2118 cut-off events. [2024-06-21 15:44:54,015 INFO L125 PetriNetUnfolderBase]: For 49578/49578 co-relation queries the response was YES. [2024-06-21 15:44:54,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9641 conditions, 2118 events. 1218/2118 cut-off events. For 49578/49578 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 12279 event pairs, 396 based on Foata normal form. 8/2124 useless extension candidates. Maximal degree in co-relation 9561. Up to 1671 conditions per place. [2024-06-21 15:44:54,029 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 101 selfloop transitions, 54 changer transitions 0/162 dead transitions. [2024-06-21 15:44:54,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 162 transitions, 1778 flow [2024-06-21 15:44:54,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:44:54,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:44:54,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 176 transitions. [2024-06-21 15:44:54,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5641025641025641 [2024-06-21 15:44:54,030 INFO L175 Difference]: Start difference. First operand has 173 places, 145 transitions, 1400 flow. Second operand 8 states and 176 transitions. [2024-06-21 15:44:54,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 162 transitions, 1778 flow [2024-06-21 15:44:54,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 162 transitions, 1632 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-21 15:44:54,130 INFO L231 Difference]: Finished difference. Result has 174 places, 145 transitions, 1366 flow [2024-06-21 15:44:54,130 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1254, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1366, PETRI_PLACES=174, PETRI_TRANSITIONS=145} [2024-06-21 15:44:54,131 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 134 predicate places. [2024-06-21 15:44:54,131 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 145 transitions, 1366 flow [2024-06-21 15:44:54,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-21 15:44:54,131 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:54,131 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] [2024-06-21 15:44:54,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-21 15:44:54,131 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:54,132 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:54,132 INFO L85 PathProgramCache]: Analyzing trace with hash -221382683, now seen corresponding path program 13 times [2024-06-21 15:44:54,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:54,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560733520] [2024-06-21 15:44:54,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:54,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:54,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:54,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:54,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:54,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560733520] [2024-06-21 15:44:54,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560733520] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:54,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:54,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:44:54,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178990997] [2024-06-21 15:44:54,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:54,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:44:54,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:54,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:44:54,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:44:54,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 15:44:54,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 145 transitions, 1366 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-21 15:44:54,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:54,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 15:44:54,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:54,524 INFO L124 PetriNetUnfolderBase]: 1279/2219 cut-off events. [2024-06-21 15:44:54,524 INFO L125 PetriNetUnfolderBase]: For 53826/53826 co-relation queries the response was YES. [2024-06-21 15:44:54,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10293 conditions, 2219 events. 1279/2219 cut-off events. For 53826/53826 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 12915 event pairs, 301 based on Foata normal form. 6/2223 useless extension candidates. Maximal degree in co-relation 10213. Up to 1706 conditions per place. [2024-06-21 15:44:54,541 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 112 selfloop transitions, 53 changer transitions 0/172 dead transitions. [2024-06-21 15:44:54,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 172 transitions, 1938 flow [2024-06-21 15:44:54,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 15:44:54,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 15:44:54,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 195 transitions. [2024-06-21 15:44:54,542 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2024-06-21 15:44:54,543 INFO L175 Difference]: Start difference. First operand has 174 places, 145 transitions, 1366 flow. Second operand 9 states and 195 transitions. [2024-06-21 15:44:54,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 172 transitions, 1938 flow [2024-06-21 15:44:54,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 172 transitions, 1810 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-21 15:44:54,636 INFO L231 Difference]: Finished difference. Result has 176 places, 149 transitions, 1420 flow [2024-06-21 15:44:54,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1238, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1420, PETRI_PLACES=176, PETRI_TRANSITIONS=149} [2024-06-21 15:44:54,637 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 136 predicate places. [2024-06-21 15:44:54,637 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 149 transitions, 1420 flow [2024-06-21 15:44:54,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-21 15:44:54,637 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:54,637 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] [2024-06-21 15:44:54,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-21 15:44:54,638 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:54,638 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:54,638 INFO L85 PathProgramCache]: Analyzing trace with hash -226144283, now seen corresponding path program 14 times [2024-06-21 15:44:54,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:54,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710027155] [2024-06-21 15:44:54,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:54,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:54,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:54,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:54,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:54,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710027155] [2024-06-21 15:44:54,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710027155] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:54,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:54,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:44:54,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432962190] [2024-06-21 15:44:54,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:54,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:44:54,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:54,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:44:54,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:44:54,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 15:44:54,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 149 transitions, 1420 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-21 15:44:54,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:54,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 15:44:54,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:55,019 INFO L124 PetriNetUnfolderBase]: 1393/2395 cut-off events. [2024-06-21 15:44:55,020 INFO L125 PetriNetUnfolderBase]: For 78947/78947 co-relation queries the response was YES. [2024-06-21 15:44:55,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11861 conditions, 2395 events. 1393/2395 cut-off events. For 78947/78947 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 14079 event pairs, 415 based on Foata normal form. 6/2399 useless extension candidates. Maximal degree in co-relation 11780. Up to 1246 conditions per place. [2024-06-21 15:44:55,040 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 90 selfloop transitions, 76 changer transitions 0/173 dead transitions. [2024-06-21 15:44:55,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 173 transitions, 2030 flow [2024-06-21 15:44:55,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:44:55,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:44:55,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 181 transitions. [2024-06-21 15:44:55,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5801282051282052 [2024-06-21 15:44:55,041 INFO L175 Difference]: Start difference. First operand has 176 places, 149 transitions, 1420 flow. Second operand 8 states and 181 transitions. [2024-06-21 15:44:55,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 173 transitions, 2030 flow [2024-06-21 15:44:55,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 173 transitions, 1939 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-21 15:44:55,163 INFO L231 Difference]: Finished difference. Result has 180 places, 149 transitions, 1485 flow [2024-06-21 15:44:55,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1329, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1485, PETRI_PLACES=180, PETRI_TRANSITIONS=149} [2024-06-21 15:44:55,164 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 140 predicate places. [2024-06-21 15:44:55,164 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 149 transitions, 1485 flow [2024-06-21 15:44:55,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-21 15:44:55,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:55,164 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] [2024-06-21 15:44:55,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-21 15:44:55,165 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:55,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:55,165 INFO L85 PathProgramCache]: Analyzing trace with hash -1197254731, now seen corresponding path program 15 times [2024-06-21 15:44:55,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:55,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307737136] [2024-06-21 15:44:55,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:55,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:55,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:55,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:55,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:55,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307737136] [2024-06-21 15:44:55,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307737136] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:55,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:55,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:44:55,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492488946] [2024-06-21 15:44:55,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:55,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:44:55,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:55,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:44:55,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:44:55,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 15:44:55,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 149 transitions, 1485 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-21 15:44:55,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:55,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 15:44:55,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:55,521 INFO L124 PetriNetUnfolderBase]: 1380/2378 cut-off events. [2024-06-21 15:44:55,521 INFO L125 PetriNetUnfolderBase]: For 74568/74568 co-relation queries the response was YES. [2024-06-21 15:44:55,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11661 conditions, 2378 events. 1380/2378 cut-off events. For 74568/74568 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 14006 event pairs, 364 based on Foata normal form. 6/2382 useless extension candidates. Maximal degree in co-relation 11579. Up to 1958 conditions per place. [2024-06-21 15:44:55,540 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 110 selfloop transitions, 50 changer transitions 0/167 dead transitions. [2024-06-21 15:44:55,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 167 transitions, 1867 flow [2024-06-21 15:44:55,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:44:55,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:44:55,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 175 transitions. [2024-06-21 15:44:55,541 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5608974358974359 [2024-06-21 15:44:55,541 INFO L175 Difference]: Start difference. First operand has 180 places, 149 transitions, 1485 flow. Second operand 8 states and 175 transitions. [2024-06-21 15:44:55,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 167 transitions, 1867 flow [2024-06-21 15:44:55,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 167 transitions, 1607 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-21 15:44:55,658 INFO L231 Difference]: Finished difference. Result has 181 places, 149 transitions, 1329 flow [2024-06-21 15:44:55,658 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1225, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1329, PETRI_PLACES=181, PETRI_TRANSITIONS=149} [2024-06-21 15:44:55,658 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 141 predicate places. [2024-06-21 15:44:55,658 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 149 transitions, 1329 flow [2024-06-21 15:44:55,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-21 15:44:55,659 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:55,659 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:44:55,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-21 15:44:55,659 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:55,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:55,659 INFO L85 PathProgramCache]: Analyzing trace with hash -1331484617, now seen corresponding path program 1 times [2024-06-21 15:44:55,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:55,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330438794] [2024-06-21 15:44:55,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:55,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:55,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:55,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:55,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:55,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330438794] [2024-06-21 15:44:55,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330438794] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:55,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:55,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:44:55,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780440476] [2024-06-21 15:44:55,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:55,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:44:55,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:55,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:44:55,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:44:55,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 15:44:55,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 149 transitions, 1329 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 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) [2024-06-21 15:44:55,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:55,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 15:44:55,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:56,088 INFO L124 PetriNetUnfolderBase]: 1455/2546 cut-off events. [2024-06-21 15:44:56,088 INFO L125 PetriNetUnfolderBase]: For 86579/86580 co-relation queries the response was YES. [2024-06-21 15:44:56,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11303 conditions, 2546 events. 1455/2546 cut-off events. For 86579/86580 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 15521 event pairs, 247 based on Foata normal form. 19/2564 useless extension candidates. Maximal degree in co-relation 11222. Up to 1667 conditions per place. [2024-06-21 15:44:56,111 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 139 selfloop transitions, 27 changer transitions 11/184 dead transitions. [2024-06-21 15:44:56,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 184 transitions, 1926 flow [2024-06-21 15:44:56,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:44:56,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:44:56,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-21 15:44:56,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-21 15:44:56,113 INFO L175 Difference]: Start difference. First operand has 181 places, 149 transitions, 1329 flow. Second operand 7 states and 169 transitions. [2024-06-21 15:44:56,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 184 transitions, 1926 flow [2024-06-21 15:44:56,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 184 transitions, 1796 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-21 15:44:56,294 INFO L231 Difference]: Finished difference. Result has 180 places, 149 transitions, 1276 flow [2024-06-21 15:44:56,294 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1199, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1276, PETRI_PLACES=180, PETRI_TRANSITIONS=149} [2024-06-21 15:44:56,295 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 140 predicate places. [2024-06-21 15:44:56,295 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 149 transitions, 1276 flow [2024-06-21 15:44:56,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 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) [2024-06-21 15:44:56,295 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:56,295 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:44:56,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-21 15:44:56,295 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:56,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:56,296 INFO L85 PathProgramCache]: Analyzing trace with hash -1331186087, now seen corresponding path program 2 times [2024-06-21 15:44:56,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:56,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023872960] [2024-06-21 15:44:56,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:56,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:56,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:56,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:56,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:56,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023872960] [2024-06-21 15:44:56,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023872960] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:56,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:56,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:44:56,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478285399] [2024-06-21 15:44:56,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:56,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:44:56,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:56,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:44:56,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:44:56,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 15:44:56,444 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 149 transitions, 1276 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 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) [2024-06-21 15:44:56,444 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:56,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 15:44:56,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:56,739 INFO L124 PetriNetUnfolderBase]: 1371/2398 cut-off events. [2024-06-21 15:44:56,739 INFO L125 PetriNetUnfolderBase]: For 82340/82341 co-relation queries the response was YES. [2024-06-21 15:44:56,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10588 conditions, 2398 events. 1371/2398 cut-off events. For 82340/82341 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 14443 event pairs, 306 based on Foata normal form. 19/2416 useless extension candidates. Maximal degree in co-relation 10505. Up to 1667 conditions per place. [2024-06-21 15:44:56,760 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 138 selfloop transitions, 22 changer transitions 10/177 dead transitions. [2024-06-21 15:44:56,760 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 177 transitions, 1818 flow [2024-06-21 15:44:56,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:44:56,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:44:56,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-21 15:44:56,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5970695970695971 [2024-06-21 15:44:56,768 INFO L175 Difference]: Start difference. First operand has 180 places, 149 transitions, 1276 flow. Second operand 7 states and 163 transitions. [2024-06-21 15:44:56,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 177 transitions, 1818 flow [2024-06-21 15:44:56,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 177 transitions, 1772 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-21 15:44:56,868 INFO L231 Difference]: Finished difference. Result has 179 places, 145 transitions, 1241 flow [2024-06-21 15:44:56,868 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1234, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1241, PETRI_PLACES=179, PETRI_TRANSITIONS=145} [2024-06-21 15:44:56,869 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 139 predicate places. [2024-06-21 15:44:56,869 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 145 transitions, 1241 flow [2024-06-21 15:44:56,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 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) [2024-06-21 15:44:56,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:56,869 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:44:56,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-21 15:44:56,869 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:56,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:56,869 INFO L85 PathProgramCache]: Analyzing trace with hash -1250014537, now seen corresponding path program 1 times [2024-06-21 15:44:56,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:56,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346348744] [2024-06-21 15:44:56,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:56,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:56,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:56,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:56,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:56,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346348744] [2024-06-21 15:44:56,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346348744] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:56,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:56,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:44:56,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838760872] [2024-06-21 15:44:56,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:56,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:44:56,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:56,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:44:56,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:44:57,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 15:44:57,014 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 145 transitions, 1241 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 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) [2024-06-21 15:44:57,014 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:57,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 15:44:57,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:57,259 INFO L124 PetriNetUnfolderBase]: 1335/2330 cut-off events. [2024-06-21 15:44:57,259 INFO L125 PetriNetUnfolderBase]: For 79146/79147 co-relation queries the response was YES. [2024-06-21 15:44:57,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10262 conditions, 2330 events. 1335/2330 cut-off events. For 79146/79147 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 13860 event pairs, 237 based on Foata normal form. 19/2348 useless extension candidates. Maximal degree in co-relation 10180. Up to 1667 conditions per place. [2024-06-21 15:44:57,275 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 136 selfloop transitions, 23 changer transitions 8/174 dead transitions. [2024-06-21 15:44:57,276 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 174 transitions, 1785 flow [2024-06-21 15:44:57,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:44:57,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:44:57,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-21 15:44:57,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6007326007326007 [2024-06-21 15:44:57,277 INFO L175 Difference]: Start difference. First operand has 179 places, 145 transitions, 1241 flow. Second operand 7 states and 164 transitions. [2024-06-21 15:44:57,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 174 transitions, 1785 flow [2024-06-21 15:44:57,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 174 transitions, 1731 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-21 15:44:57,395 INFO L231 Difference]: Finished difference. Result has 175 places, 143 transitions, 1221 flow [2024-06-21 15:44:57,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1189, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1221, PETRI_PLACES=175, PETRI_TRANSITIONS=143} [2024-06-21 15:44:57,395 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 135 predicate places. [2024-06-21 15:44:57,395 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 143 transitions, 1221 flow [2024-06-21 15:44:57,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 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) [2024-06-21 15:44:57,395 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:57,396 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:44:57,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-21 15:44:57,396 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:57,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:57,396 INFO L85 PathProgramCache]: Analyzing trace with hash -1250008957, now seen corresponding path program 2 times [2024-06-21 15:44:57,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:57,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662752851] [2024-06-21 15:44:57,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:57,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:57,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:57,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:57,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:57,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662752851] [2024-06-21 15:44:57,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662752851] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:57,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:57,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:44:57,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706880691] [2024-06-21 15:44:57,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:57,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:44:57,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:57,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:44:57,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:44:57,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 15:44:57,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 143 transitions, 1221 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 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) [2024-06-21 15:44:57,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:57,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 15:44:57,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:57,766 INFO L124 PetriNetUnfolderBase]: 1230/2143 cut-off events. [2024-06-21 15:44:57,766 INFO L125 PetriNetUnfolderBase]: For 57123/57124 co-relation queries the response was YES. [2024-06-21 15:44:57,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8791 conditions, 2143 events. 1230/2143 cut-off events. For 57123/57124 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 12528 event pairs, 219 based on Foata normal form. 19/2161 useless extension candidates. Maximal degree in co-relation 8711. Up to 1667 conditions per place. [2024-06-21 15:44:57,780 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 133 selfloop transitions, 20 changer transitions 10/170 dead transitions. [2024-06-21 15:44:57,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 170 transitions, 1647 flow [2024-06-21 15:44:57,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:44:57,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:44:57,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 162 transitions. [2024-06-21 15:44:57,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5934065934065934 [2024-06-21 15:44:57,781 INFO L175 Difference]: Start difference. First operand has 175 places, 143 transitions, 1221 flow. Second operand 7 states and 162 transitions. [2024-06-21 15:44:57,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 170 transitions, 1647 flow [2024-06-21 15:44:57,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 170 transitions, 1597 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-21 15:44:57,890 INFO L231 Difference]: Finished difference. Result has 174 places, 139 transitions, 1169 flow [2024-06-21 15:44:57,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1171, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1169, PETRI_PLACES=174, PETRI_TRANSITIONS=139} [2024-06-21 15:44:57,890 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 134 predicate places. [2024-06-21 15:44:57,890 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 139 transitions, 1169 flow [2024-06-21 15:44:57,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 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) [2024-06-21 15:44:57,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:57,891 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:44:57,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-21 15:44:57,891 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:57,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:57,891 INFO L85 PathProgramCache]: Analyzing trace with hash -1682775713, now seen corresponding path program 3 times [2024-06-21 15:44:57,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:57,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544740346] [2024-06-21 15:44:57,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:57,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:57,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:57,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:57,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:57,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544740346] [2024-06-21 15:44:57,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544740346] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:57,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:57,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:44:57,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749705093] [2024-06-21 15:44:57,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:57,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:44:57,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:57,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:44:57,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:44:58,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 15:44:58,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 139 transitions, 1169 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 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) [2024-06-21 15:44:58,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:58,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 15:44:58,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:58,299 INFO L124 PetriNetUnfolderBase]: 1283/2240 cut-off events. [2024-06-21 15:44:58,299 INFO L125 PetriNetUnfolderBase]: For 79189/79190 co-relation queries the response was YES. [2024-06-21 15:44:58,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9891 conditions, 2240 events. 1283/2240 cut-off events. For 79189/79190 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 13229 event pairs, 239 based on Foata normal form. 19/2258 useless extension candidates. Maximal degree in co-relation 9811. Up to 1579 conditions per place. [2024-06-21 15:44:58,317 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 139 selfloop transitions, 24 changer transitions 8/178 dead transitions. [2024-06-21 15:44:58,317 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 178 transitions, 1757 flow [2024-06-21 15:44:58,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 15:44:58,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 15:44:58,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 219 transitions. [2024-06-21 15:44:58,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5615384615384615 [2024-06-21 15:44:58,318 INFO L175 Difference]: Start difference. First operand has 174 places, 139 transitions, 1169 flow. Second operand 10 states and 219 transitions. [2024-06-21 15:44:58,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 178 transitions, 1757 flow [2024-06-21 15:44:58,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 178 transitions, 1685 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-21 15:44:58,421 INFO L231 Difference]: Finished difference. Result has 175 places, 137 transitions, 1133 flow [2024-06-21 15:44:58,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1099, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1133, PETRI_PLACES=175, PETRI_TRANSITIONS=137} [2024-06-21 15:44:58,422 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 135 predicate places. [2024-06-21 15:44:58,422 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 137 transitions, 1133 flow [2024-06-21 15:44:58,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 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) [2024-06-21 15:44:58,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:58,422 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:44:58,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-21 15:44:58,423 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:58,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:58,423 INFO L85 PathProgramCache]: Analyzing trace with hash -2039944023, now seen corresponding path program 4 times [2024-06-21 15:44:58,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:58,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249278644] [2024-06-21 15:44:58,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:58,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:58,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:58,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:58,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:58,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249278644] [2024-06-21 15:44:58,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249278644] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:58,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:58,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:44:58,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681569466] [2024-06-21 15:44:58,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:58,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:44:58,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:58,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:44:58,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:44:58,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 15:44:58,546 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 137 transitions, 1133 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 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) [2024-06-21 15:44:58,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:58,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 15:44:58,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:58,810 INFO L124 PetriNetUnfolderBase]: 1178/2053 cut-off events. [2024-06-21 15:44:58,810 INFO L125 PetriNetUnfolderBase]: For 56992/56993 co-relation queries the response was YES. [2024-06-21 15:44:58,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8443 conditions, 2053 events. 1178/2053 cut-off events. For 56992/56993 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 11876 event pairs, 227 based on Foata normal form. 19/2071 useless extension candidates. Maximal degree in co-relation 8363. Up to 1579 conditions per place. [2024-06-21 15:44:58,825 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 127 selfloop transitions, 21 changer transitions 12/167 dead transitions. [2024-06-21 15:44:58,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 167 transitions, 1567 flow [2024-06-21 15:44:58,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:44:58,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:44:58,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2024-06-21 15:44:58,826 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5769230769230769 [2024-06-21 15:44:58,826 INFO L175 Difference]: Start difference. First operand has 175 places, 137 transitions, 1133 flow. Second operand 8 states and 180 transitions. [2024-06-21 15:44:58,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 167 transitions, 1567 flow [2024-06-21 15:44:58,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 167 transitions, 1492 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-21 15:44:58,914 INFO L231 Difference]: Finished difference. Result has 171 places, 135 transitions, 1089 flow [2024-06-21 15:44:58,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1058, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1089, PETRI_PLACES=171, PETRI_TRANSITIONS=135} [2024-06-21 15:44:58,915 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 131 predicate places. [2024-06-21 15:44:58,915 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 135 transitions, 1089 flow [2024-06-21 15:44:58,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 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) [2024-06-21 15:44:58,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:58,915 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:44:58,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-21 15:44:58,915 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:58,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:58,916 INFO L85 PathProgramCache]: Analyzing trace with hash -2043663093, now seen corresponding path program 5 times [2024-06-21 15:44:58,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:58,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161974924] [2024-06-21 15:44:58,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:58,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:58,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:58,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:58,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:58,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161974924] [2024-06-21 15:44:58,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161974924] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:58,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:58,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:44:58,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562870358] [2024-06-21 15:44:58,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:58,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:44:58,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:58,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:44:58,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:44:59,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 15:44:59,029 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 135 transitions, 1089 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 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) [2024-06-21 15:44:59,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:59,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 15:44:59,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:59,244 INFO L124 PetriNetUnfolderBase]: 1154/2001 cut-off events. [2024-06-21 15:44:59,244 INFO L125 PetriNetUnfolderBase]: For 56869/56870 co-relation queries the response was YES. [2024-06-21 15:44:59,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8187 conditions, 2001 events. 1154/2001 cut-off events. For 56869/56870 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 11451 event pairs, 246 based on Foata normal form. 19/2019 useless extension candidates. Maximal degree in co-relation 8109. Up to 1511 conditions per place. [2024-06-21 15:44:59,257 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 121 selfloop transitions, 17 changer transitions 20/165 dead transitions. [2024-06-21 15:44:59,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 165 transitions, 1519 flow [2024-06-21 15:44:59,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:44:59,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:44:59,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 178 transitions. [2024-06-21 15:44:59,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5705128205128205 [2024-06-21 15:44:59,258 INFO L175 Difference]: Start difference. First operand has 171 places, 135 transitions, 1089 flow. Second operand 8 states and 178 transitions. [2024-06-21 15:44:59,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 165 transitions, 1519 flow [2024-06-21 15:44:59,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 165 transitions, 1473 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-21 15:44:59,337 INFO L231 Difference]: Finished difference. Result has 168 places, 129 transitions, 1026 flow [2024-06-21 15:44:59,337 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1043, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1026, PETRI_PLACES=168, PETRI_TRANSITIONS=129} [2024-06-21 15:44:59,337 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 128 predicate places. [2024-06-21 15:44:59,337 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 129 transitions, 1026 flow [2024-06-21 15:44:59,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 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) [2024-06-21 15:44:59,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:59,338 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:44:59,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-21 15:44:59,338 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:59,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:59,338 INFO L85 PathProgramCache]: Analyzing trace with hash 581354063, now seen corresponding path program 3 times [2024-06-21 15:44:59,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:59,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111688948] [2024-06-21 15:44:59,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:59,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:59,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:59,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:59,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:59,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111688948] [2024-06-21 15:44:59,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111688948] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:59,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:59,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:44:59,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376813663] [2024-06-21 15:44:59,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:59,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:44:59,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:59,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:44:59,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:44:59,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 15:44:59,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 129 transitions, 1026 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:59,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:59,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 15:44:59,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:59,804 INFO L124 PetriNetUnfolderBase]: 1327/2309 cut-off events. [2024-06-21 15:44:59,804 INFO L125 PetriNetUnfolderBase]: For 112385/112386 co-relation queries the response was YES. [2024-06-21 15:44:59,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11487 conditions, 2309 events. 1327/2309 cut-off events. For 112385/112386 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 13889 event pairs, 428 based on Foata normal form. 19/2326 useless extension candidates. Maximal degree in co-relation 11410. Up to 1268 conditions per place. [2024-06-21 15:44:59,821 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 116 selfloop transitions, 43 changer transitions 11/177 dead transitions. [2024-06-21 15:44:59,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 177 transitions, 1730 flow [2024-06-21 15:44:59,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 15:44:59,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 15:44:59,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 284 transitions. [2024-06-21 15:44:59,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5601577909270217 [2024-06-21 15:44:59,822 INFO L175 Difference]: Start difference. First operand has 168 places, 129 transitions, 1026 flow. Second operand 13 states and 284 transitions. [2024-06-21 15:44:59,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 177 transitions, 1730 flow [2024-06-21 15:44:59,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 177 transitions, 1623 flow, removed 9 selfloop flow, removed 12 redundant places. [2024-06-21 15:44:59,971 INFO L231 Difference]: Finished difference. Result has 164 places, 127 transitions, 1006 flow [2024-06-21 15:44:59,971 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=931, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1006, PETRI_PLACES=164, PETRI_TRANSITIONS=127} [2024-06-21 15:44:59,971 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 124 predicate places. [2024-06-21 15:44:59,972 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 127 transitions, 1006 flow [2024-06-21 15:44:59,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:59,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:59,972 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:44:59,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-21 15:44:59,972 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:59,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:59,973 INFO L85 PathProgramCache]: Analyzing trace with hash 1305194137, now seen corresponding path program 4 times [2024-06-21 15:44:59,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:59,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845930607] [2024-06-21 15:44:59,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:59,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:59,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:45:00,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:45:00,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:45:00,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845930607] [2024-06-21 15:45:00,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845930607] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:45:00,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:45:00,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:45:00,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618240909] [2024-06-21 15:45:00,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:45:00,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:45:00,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:45:00,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:45:00,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:45:00,104 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 15:45:00,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 127 transitions, 1006 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:00,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:45:00,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 15:45:00,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:45:00,465 INFO L124 PetriNetUnfolderBase]: 1390/2390 cut-off events. [2024-06-21 15:45:00,465 INFO L125 PetriNetUnfolderBase]: For 129634/129635 co-relation queries the response was YES. [2024-06-21 15:45:00,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12711 conditions, 2390 events. 1390/2390 cut-off events. For 129634/129635 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 14380 event pairs, 490 based on Foata normal form. 19/2407 useless extension candidates. Maximal degree in co-relation 12639. Up to 1268 conditions per place. [2024-06-21 15:45:00,485 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 115 selfloop transitions, 41 changer transitions 9/172 dead transitions. [2024-06-21 15:45:00,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 172 transitions, 1684 flow [2024-06-21 15:45:00,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 15:45:00,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 15:45:00,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 281 transitions. [2024-06-21 15:45:00,486 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5542406311637081 [2024-06-21 15:45:00,486 INFO L175 Difference]: Start difference. First operand has 164 places, 127 transitions, 1006 flow. Second operand 13 states and 281 transitions. [2024-06-21 15:45:00,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 172 transitions, 1684 flow [2024-06-21 15:45:00,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 172 transitions, 1588 flow, removed 6 selfloop flow, removed 12 redundant places. [2024-06-21 15:45:00,591 INFO L231 Difference]: Finished difference. Result has 163 places, 124 transitions, 980 flow [2024-06-21 15:45:00,592 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=918, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=980, PETRI_PLACES=163, PETRI_TRANSITIONS=124} [2024-06-21 15:45:00,592 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 123 predicate places. [2024-06-21 15:45:00,592 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 124 transitions, 980 flow [2024-06-21 15:45:00,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:00,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:45:00,592 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:45:00,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-21 15:45:00,593 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:45:00,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:45:00,593 INFO L85 PathProgramCache]: Analyzing trace with hash 1103806357, now seen corresponding path program 5 times [2024-06-21 15:45:00,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:45:00,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263371392] [2024-06-21 15:45:00,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:45:00,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:45:00,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:45:00,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:45:00,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:45:00,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263371392] [2024-06-21 15:45:00,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263371392] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:45:00,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:45:00,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:45:00,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590674184] [2024-06-21 15:45:00,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:45:00,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:45:00,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:45:00,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:45:00,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:45:00,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 15:45:00,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 124 transitions, 980 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:00,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:45:00,722 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 15:45:00,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:45:01,029 INFO L124 PetriNetUnfolderBase]: 1264/2172 cut-off events. [2024-06-21 15:45:01,030 INFO L125 PetriNetUnfolderBase]: For 105454/105455 co-relation queries the response was YES. [2024-06-21 15:45:01,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10845 conditions, 2172 events. 1264/2172 cut-off events. For 105454/105455 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 12751 event pairs, 474 based on Foata normal form. 25/2195 useless extension candidates. Maximal degree in co-relation 10774. Up to 1502 conditions per place. [2024-06-21 15:45:01,045 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 104 selfloop transitions, 38 changer transitions 13/162 dead transitions. [2024-06-21 15:45:01,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 162 transitions, 1514 flow [2024-06-21 15:45:01,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 15:45:01,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 15:45:01,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 257 transitions. [2024-06-21 15:45:01,046 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5491452991452992 [2024-06-21 15:45:01,046 INFO L175 Difference]: Start difference. First operand has 163 places, 124 transitions, 980 flow. Second operand 12 states and 257 transitions. [2024-06-21 15:45:01,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 162 transitions, 1514 flow [2024-06-21 15:45:01,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 162 transitions, 1421 flow, removed 6 selfloop flow, removed 13 redundant places. [2024-06-21 15:45:01,116 INFO L231 Difference]: Finished difference. Result has 159 places, 121 transitions, 944 flow [2024-06-21 15:45:01,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=893, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=944, PETRI_PLACES=159, PETRI_TRANSITIONS=121} [2024-06-21 15:45:01,117 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 119 predicate places. [2024-06-21 15:45:01,117 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 121 transitions, 944 flow [2024-06-21 15:45:01,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:01,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:45:01,117 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:45:01,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-21 15:45:01,118 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:45:01,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:45:01,118 INFO L85 PathProgramCache]: Analyzing trace with hash -555989371, now seen corresponding path program 6 times [2024-06-21 15:45:01,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:45:01,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702470918] [2024-06-21 15:45:01,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:45:01,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:45:01,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:45:01,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:45:01,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:45:01,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702470918] [2024-06-21 15:45:01,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702470918] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:45:01,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:45:01,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:45:01,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341447667] [2024-06-21 15:45:01,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:45:01,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:45:01,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:45:01,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:45:01,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:45:01,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 15:45:01,268 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 121 transitions, 944 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:01,268 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:45:01,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 15:45:01,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:45:01,534 INFO L124 PetriNetUnfolderBase]: 1204/2068 cut-off events. [2024-06-21 15:45:01,534 INFO L125 PetriNetUnfolderBase]: For 98733/98734 co-relation queries the response was YES. [2024-06-21 15:45:01,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10303 conditions, 2068 events. 1204/2068 cut-off events. For 98733/98734 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 11989 event pairs, 508 based on Foata normal form. 27/2093 useless extension candidates. Maximal degree in co-relation 10234. Up to 1713 conditions per place. [2024-06-21 15:45:01,549 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 92 selfloop transitions, 33 changer transitions 17/149 dead transitions. [2024-06-21 15:45:01,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 149 transitions, 1316 flow [2024-06-21 15:45:01,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 15:45:01,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 15:45:01,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 247 transitions. [2024-06-21 15:45:01,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5277777777777778 [2024-06-21 15:45:01,550 INFO L175 Difference]: Start difference. First operand has 159 places, 121 transitions, 944 flow. Second operand 12 states and 247 transitions. [2024-06-21 15:45:01,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 149 transitions, 1316 flow [2024-06-21 15:45:01,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 149 transitions, 1242 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-21 15:45:01,618 INFO L231 Difference]: Finished difference. Result has 157 places, 116 transitions, 904 flow [2024-06-21 15:45:01,618 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=870, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=904, PETRI_PLACES=157, PETRI_TRANSITIONS=116} [2024-06-21 15:45:01,619 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 117 predicate places. [2024-06-21 15:45:01,619 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 116 transitions, 904 flow [2024-06-21 15:45:01,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:01,619 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:45:01,619 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:45:01,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-21 15:45:01,619 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:45:01,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:45:01,620 INFO L85 PathProgramCache]: Analyzing trace with hash -268892791, now seen corresponding path program 7 times [2024-06-21 15:45:01,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:45:01,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643968484] [2024-06-21 15:45:01,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:45:01,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:45:01,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:45:01,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:45:01,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:45:01,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643968484] [2024-06-21 15:45:01,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643968484] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:45:01,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:45:01,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:45:01,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456106036] [2024-06-21 15:45:01,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:45:01,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:45:01,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:45:01,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:45:01,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:45:01,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 15:45:01,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 116 transitions, 904 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:01,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:45:01,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 15:45:01,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:45:02,010 INFO L124 PetriNetUnfolderBase]: 1071/1833 cut-off events. [2024-06-21 15:45:02,010 INFO L125 PetriNetUnfolderBase]: For 70450/70451 co-relation queries the response was YES. [2024-06-21 15:45:02,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8447 conditions, 1833 events. 1071/1833 cut-off events. For 70450/70451 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 10247 event pairs, 374 based on Foata normal form. 25/1856 useless extension candidates. Maximal degree in co-relation 8379. Up to 1268 conditions per place. [2024-06-21 15:45:02,023 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 99 selfloop transitions, 31 changer transitions 10/147 dead transitions. [2024-06-21 15:45:02,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 147 transitions, 1384 flow [2024-06-21 15:45:02,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 15:45:02,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 15:45:02,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 232 transitions. [2024-06-21 15:45:02,024 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5407925407925408 [2024-06-21 15:45:02,024 INFO L175 Difference]: Start difference. First operand has 157 places, 116 transitions, 904 flow. Second operand 11 states and 232 transitions. [2024-06-21 15:45:02,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 147 transitions, 1384 flow [2024-06-21 15:45:02,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 147 transitions, 1306 flow, removed 6 selfloop flow, removed 11 redundant places. [2024-06-21 15:45:02,084 INFO L231 Difference]: Finished difference. Result has 152 places, 113 transitions, 872 flow [2024-06-21 15:45:02,084 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=832, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=872, PETRI_PLACES=152, PETRI_TRANSITIONS=113} [2024-06-21 15:45:02,084 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 112 predicate places. [2024-06-21 15:45:02,084 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 113 transitions, 872 flow [2024-06-21 15:45:02,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:02,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:45:02,085 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:45:02,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-21 15:45:02,085 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:45:02,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:45:02,085 INFO L85 PathProgramCache]: Analyzing trace with hash 1393550647, now seen corresponding path program 8 times [2024-06-21 15:45:02,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:45:02,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588152025] [2024-06-21 15:45:02,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:45:02,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:45:02,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:45:02,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:45:02,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:45:02,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588152025] [2024-06-21 15:45:02,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588152025] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:45:02,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:45:02,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:45:02,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752684268] [2024-06-21 15:45:02,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:45:02,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:45:02,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:45:02,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:45:02,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:45:02,224 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 15:45:02,224 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 113 transitions, 872 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:02,224 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:45:02,224 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 15:45:02,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:45:02,425 INFO L124 PetriNetUnfolderBase]: 920/1580 cut-off events. [2024-06-21 15:45:02,425 INFO L125 PetriNetUnfolderBase]: For 44766/44767 co-relation queries the response was YES. [2024-06-21 15:45:02,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6447 conditions, 1580 events. 920/1580 cut-off events. For 44766/44767 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 8618 event pairs, 331 based on Foata normal form. 27/1605 useless extension candidates. Maximal degree in co-relation 6381. Up to 1268 conditions per place. [2024-06-21 15:45:02,435 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 85 selfloop transitions, 25 changer transitions 19/136 dead transitions. [2024-06-21 15:45:02,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 136 transitions, 1206 flow [2024-06-21 15:45:02,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 15:45:02,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 15:45:02,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 207 transitions. [2024-06-21 15:45:02,436 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5307692307692308 [2024-06-21 15:45:02,436 INFO L175 Difference]: Start difference. First operand has 152 places, 113 transitions, 872 flow. Second operand 10 states and 207 transitions. [2024-06-21 15:45:02,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 136 transitions, 1206 flow [2024-06-21 15:45:02,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 136 transitions, 1143 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-21 15:45:02,476 INFO L231 Difference]: Finished difference. Result has 149 places, 107 transitions, 818 flow [2024-06-21 15:45:02,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=809, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=818, PETRI_PLACES=149, PETRI_TRANSITIONS=107} [2024-06-21 15:45:02,477 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 109 predicate places. [2024-06-21 15:45:02,477 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 107 transitions, 818 flow [2024-06-21 15:45:02,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:02,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:45:02,477 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:45:02,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-21 15:45:02,477 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:45:02,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:45:02,478 INFO L85 PathProgramCache]: Analyzing trace with hash -726767457, now seen corresponding path program 9 times [2024-06-21 15:45:02,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:45:02,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513779914] [2024-06-21 15:45:02,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:45:02,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:45:02,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:45:02,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:45:02,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:45:02,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513779914] [2024-06-21 15:45:02,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513779914] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:45:02,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:45:02,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:45:02,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070837327] [2024-06-21 15:45:02,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:45:02,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:45:02,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:45:02,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:45:02,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:45:02,608 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 15:45:02,609 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 107 transitions, 818 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:02,609 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:45:02,609 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 15:45:02,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:45:02,885 INFO L124 PetriNetUnfolderBase]: 1088/1879 cut-off events. [2024-06-21 15:45:02,885 INFO L125 PetriNetUnfolderBase]: For 70672/70673 co-relation queries the response was YES. [2024-06-21 15:45:02,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8983 conditions, 1879 events. 1088/1879 cut-off events. For 70672/70673 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 10782 event pairs, 321 based on Foata normal form. 19/1896 useless extension candidates. Maximal degree in co-relation 8918. Up to 1050 conditions per place. [2024-06-21 15:45:02,897 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 103 selfloop transitions, 29 changer transitions 15/154 dead transitions. [2024-06-21 15:45:02,897 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 154 transitions, 1442 flow [2024-06-21 15:45:02,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 15:45:02,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 15:45:02,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 259 transitions. [2024-06-21 15:45:02,898 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5534188034188035 [2024-06-21 15:45:02,898 INFO L175 Difference]: Start difference. First operand has 149 places, 107 transitions, 818 flow. Second operand 12 states and 259 transitions. [2024-06-21 15:45:02,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 154 transitions, 1442 flow [2024-06-21 15:45:02,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 154 transitions, 1368 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-21 15:45:02,954 INFO L231 Difference]: Finished difference. Result has 143 places, 105 transitions, 807 flow [2024-06-21 15:45:02,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=760, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=807, PETRI_PLACES=143, PETRI_TRANSITIONS=105} [2024-06-21 15:45:02,954 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 103 predicate places. [2024-06-21 15:45:02,955 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 105 transitions, 807 flow [2024-06-21 15:45:02,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:02,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:45:02,955 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:45:02,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-21 15:45:02,955 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:45:02,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:45:02,955 INFO L85 PathProgramCache]: Analyzing trace with hash -715458953, now seen corresponding path program 10 times [2024-06-21 15:45:02,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:45:02,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111608962] [2024-06-21 15:45:02,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:45:02,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:45:02,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:45:03,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:45:03,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:45:03,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111608962] [2024-06-21 15:45:03,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111608962] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:45:03,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:45:03,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:45:03,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422109132] [2024-06-21 15:45:03,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:45:03,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:45:03,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:45:03,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:45:03,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:45:03,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 15:45:03,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 105 transitions, 807 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:03,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:45:03,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 15:45:03,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:45:03,358 INFO L124 PetriNetUnfolderBase]: 956/1649 cut-off events. [2024-06-21 15:45:03,358 INFO L125 PetriNetUnfolderBase]: For 48770/48771 co-relation queries the response was YES. [2024-06-21 15:45:03,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7454 conditions, 1649 events. 956/1649 cut-off events. For 48770/48771 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 9182 event pairs, 317 based on Foata normal form. 19/1666 useless extension candidates. Maximal degree in co-relation 7392. Up to 1050 conditions per place. [2024-06-21 15:45:03,368 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 87 selfloop transitions, 26 changer transitions 18/138 dead transitions. [2024-06-21 15:45:03,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 138 transitions, 1261 flow [2024-06-21 15:45:03,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 15:45:03,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 15:45:03,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 215 transitions. [2024-06-21 15:45:03,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5512820512820513 [2024-06-21 15:45:03,369 INFO L175 Difference]: Start difference. First operand has 143 places, 105 transitions, 807 flow. Second operand 10 states and 215 transitions. [2024-06-21 15:45:03,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 138 transitions, 1261 flow [2024-06-21 15:45:03,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 138 transitions, 1196 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-21 15:45:03,409 INFO L231 Difference]: Finished difference. Result has 140 places, 102 transitions, 783 flow [2024-06-21 15:45:03,409 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=746, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=783, PETRI_PLACES=140, PETRI_TRANSITIONS=102} [2024-06-21 15:45:03,409 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 100 predicate places. [2024-06-21 15:45:03,409 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 102 transitions, 783 flow [2024-06-21 15:45:03,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:03,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:45:03,410 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:45:03,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-21 15:45:03,410 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:45:03,410 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:45:03,410 INFO L85 PathProgramCache]: Analyzing trace with hash -877758099, now seen corresponding path program 11 times [2024-06-21 15:45:03,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:45:03,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770213408] [2024-06-21 15:45:03,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:45:03,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:45:03,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:45:03,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:45:03,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:45:03,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770213408] [2024-06-21 15:45:03,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770213408] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:45:03,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:45:03,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:45:03,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947764322] [2024-06-21 15:45:03,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:45:03,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:45:03,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:45:03,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:45:03,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:45:03,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 15:45:03,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 102 transitions, 783 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 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) [2024-06-21 15:45:03,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:45:03,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 15:45:03,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:45:03,744 INFO L124 PetriNetUnfolderBase]: 1093/1877 cut-off events. [2024-06-21 15:45:03,744 INFO L125 PetriNetUnfolderBase]: For 61868/61868 co-relation queries the response was YES. [2024-06-21 15:45:03,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8964 conditions, 1877 events. 1093/1877 cut-off events. For 61868/61868 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 10817 event pairs, 288 based on Foata normal form. 18/1892 useless extension candidates. Maximal degree in co-relation 8903. Up to 849 conditions per place. [2024-06-21 15:45:03,757 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 76 selfloop transitions, 27 changer transitions 22/132 dead transitions. [2024-06-21 15:45:03,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 132 transitions, 1230 flow [2024-06-21 15:45:03,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:45:03,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:45:03,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 178 transitions. [2024-06-21 15:45:03,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5705128205128205 [2024-06-21 15:45:03,758 INFO L175 Difference]: Start difference. First operand has 140 places, 102 transitions, 783 flow. Second operand 8 states and 178 transitions. [2024-06-21 15:45:03,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 132 transitions, 1230 flow [2024-06-21 15:45:03,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 132 transitions, 1166 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-21 15:45:03,807 INFO L231 Difference]: Finished difference. Result has 133 places, 97 transitions, 745 flow [2024-06-21 15:45:03,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=725, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=745, PETRI_PLACES=133, PETRI_TRANSITIONS=97} [2024-06-21 15:45:03,807 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 93 predicate places. [2024-06-21 15:45:03,807 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 97 transitions, 745 flow [2024-06-21 15:45:03,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 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) [2024-06-21 15:45:03,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:45:03,808 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:45:03,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-21 15:45:03,808 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:45:03,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:45:03,808 INFO L85 PathProgramCache]: Analyzing trace with hash 1264797321, now seen corresponding path program 12 times [2024-06-21 15:45:03,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:45:03,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722159800] [2024-06-21 15:45:03,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:45:03,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:45:03,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:45:03,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:45:03,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:45:03,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722159800] [2024-06-21 15:45:03,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722159800] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:45:03,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:45:03,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:45:03,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457849472] [2024-06-21 15:45:03,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:45:03,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:45:03,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:45:03,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:45:03,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:45:03,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 15:45:03,960 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 97 transitions, 745 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:03,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:45:03,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 15:45:03,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:45:04,180 INFO L124 PetriNetUnfolderBase]: 951/1608 cut-off events. [2024-06-21 15:45:04,181 INFO L125 PetriNetUnfolderBase]: For 46701/46701 co-relation queries the response was YES. [2024-06-21 15:45:04,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7258 conditions, 1608 events. 951/1608 cut-off events. For 46701/46701 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 8885 event pairs, 384 based on Foata normal form. 26/1634 useless extension candidates. Maximal degree in co-relation 7199. Up to 1337 conditions per place. [2024-06-21 15:45:04,191 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 69 selfloop transitions, 23 changer transitions 12/111 dead transitions. [2024-06-21 15:45:04,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 111 transitions, 1005 flow [2024-06-21 15:45:04,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 15:45:04,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 15:45:04,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 197 transitions. [2024-06-21 15:45:04,192 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5051282051282051 [2024-06-21 15:45:04,192 INFO L175 Difference]: Start difference. First operand has 133 places, 97 transitions, 745 flow. Second operand 10 states and 197 transitions. [2024-06-21 15:45:04,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 111 transitions, 1005 flow [2024-06-21 15:45:04,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 111 transitions, 938 flow, removed 5 selfloop flow, removed 10 redundant places. [2024-06-21 15:45:04,219 INFO L231 Difference]: Finished difference. Result has 126 places, 93 transitions, 698 flow [2024-06-21 15:45:04,220 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=678, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=698, PETRI_PLACES=126, PETRI_TRANSITIONS=93} [2024-06-21 15:45:04,220 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 86 predicate places. [2024-06-21 15:45:04,220 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 93 transitions, 698 flow [2024-06-21 15:45:04,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:04,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:45:04,220 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:45:04,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-21 15:45:04,221 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:45:04,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:45:04,221 INFO L85 PathProgramCache]: Analyzing trace with hash 57430817, now seen corresponding path program 6 times [2024-06-21 15:45:04,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:45:04,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049502014] [2024-06-21 15:45:04,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:45:04,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:45:04,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:45:04,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:45:04,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:45:04,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049502014] [2024-06-21 15:45:04,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049502014] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:45:04,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:45:04,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:45:04,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406013359] [2024-06-21 15:45:04,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:45:04,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:45:04,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:45:04,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:45:04,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:45:04,378 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 15:45:04,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 93 transitions, 698 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:04,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:45:04,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 15:45:04,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:45:04,591 INFO L124 PetriNetUnfolderBase]: 757/1286 cut-off events. [2024-06-21 15:45:04,591 INFO L125 PetriNetUnfolderBase]: For 24830/24830 co-relation queries the response was YES. [2024-06-21 15:45:04,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5175 conditions, 1286 events. 757/1286 cut-off events. For 24830/24830 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 6739 event pairs, 283 based on Foata normal form. 26/1312 useless extension candidates. Maximal degree in co-relation 5121. Up to 1030 conditions per place. [2024-06-21 15:45:04,598 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 68 selfloop transitions, 19 changer transitions 12/106 dead transitions. [2024-06-21 15:45:04,599 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 106 transitions, 946 flow [2024-06-21 15:45:04,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 15:45:04,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 15:45:04,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-21 15:45:04,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5071225071225072 [2024-06-21 15:45:04,599 INFO L175 Difference]: Start difference. First operand has 126 places, 93 transitions, 698 flow. Second operand 9 states and 178 transitions. [2024-06-21 15:45:04,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 106 transitions, 946 flow [2024-06-21 15:45:04,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 106 transitions, 896 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-21 15:45:04,617 INFO L231 Difference]: Finished difference. Result has 123 places, 89 transitions, 661 flow [2024-06-21 15:45:04,617 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=648, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=661, PETRI_PLACES=123, PETRI_TRANSITIONS=89} [2024-06-21 15:45:04,617 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 83 predicate places. [2024-06-21 15:45:04,617 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 89 transitions, 661 flow [2024-06-21 15:45:04,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:04,618 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:45:04,619 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:45:04,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-21 15:45:04,619 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:45:04,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:45:04,619 INFO L85 PathProgramCache]: Analyzing trace with hash 63151247, now seen corresponding path program 7 times [2024-06-21 15:45:04,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:45:04,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780127153] [2024-06-21 15:45:04,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:45:04,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:45:04,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:45:04,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:45:04,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:45:04,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780127153] [2024-06-21 15:45:04,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780127153] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:45:04,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:45:04,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:45:04,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288615800] [2024-06-21 15:45:04,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:45:04,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:45:04,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:45:04,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:45:04,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:45:04,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 15:45:04,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 89 transitions, 661 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:04,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:45:04,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 15:45:04,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:45:04,930 INFO L124 PetriNetUnfolderBase]: 742/1281 cut-off events. [2024-06-21 15:45:04,930 INFO L125 PetriNetUnfolderBase]: For 22233/22233 co-relation queries the response was YES. [2024-06-21 15:45:04,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5052 conditions, 1281 events. 742/1281 cut-off events. For 22233/22233 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 6787 event pairs, 245 based on Foata normal form. 24/1305 useless extension candidates. Maximal degree in co-relation 4999. Up to 982 conditions per place. [2024-06-21 15:45:04,937 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 66 selfloop transitions, 16 changer transitions 17/106 dead transitions. [2024-06-21 15:45:04,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 106 transitions, 933 flow [2024-06-21 15:45:04,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 15:45:04,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 15:45:04,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-21 15:45:04,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.50997150997151 [2024-06-21 15:45:04,938 INFO L175 Difference]: Start difference. First operand has 123 places, 89 transitions, 661 flow. Second operand 9 states and 179 transitions. [2024-06-21 15:45:04,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 106 transitions, 933 flow [2024-06-21 15:45:04,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 106 transitions, 891 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-21 15:45:04,955 INFO L231 Difference]: Finished difference. Result has 121 places, 85 transitions, 621 flow [2024-06-21 15:45:04,956 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=619, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=621, PETRI_PLACES=121, PETRI_TRANSITIONS=85} [2024-06-21 15:45:04,956 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 81 predicate places. [2024-06-21 15:45:04,956 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 85 transitions, 621 flow [2024-06-21 15:45:04,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:04,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:45:04,956 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:45:04,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-21 15:45:04,957 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:45:04,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:45:04,957 INFO L85 PathProgramCache]: Analyzing trace with hash 52247927, now seen corresponding path program 8 times [2024-06-21 15:45:04,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:45:04,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015652883] [2024-06-21 15:45:04,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:45:04,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:45:04,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:45:05,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:45:05,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:45:05,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015652883] [2024-06-21 15:45:05,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015652883] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:45:05,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:45:05,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:45:05,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838502281] [2024-06-21 15:45:05,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:45:05,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:45:05,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:45:05,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:45:05,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:45:05,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 15:45:05,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 85 transitions, 621 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:05,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:45:05,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 15:45:05,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:45:05,269 INFO L124 PetriNetUnfolderBase]: 709/1222 cut-off events. [2024-06-21 15:45:05,269 INFO L125 PetriNetUnfolderBase]: For 21017/21017 co-relation queries the response was YES. [2024-06-21 15:45:05,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4817 conditions, 1222 events. 709/1222 cut-off events. For 21017/21017 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 6432 event pairs, 225 based on Foata normal form. 24/1246 useless extension candidates. Maximal degree in co-relation 4765. Up to 902 conditions per place. [2024-06-21 15:45:05,276 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 69 selfloop transitions, 14 changer transitions 11/101 dead transitions. [2024-06-21 15:45:05,276 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 101 transitions, 881 flow [2024-06-21 15:45:05,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:45:05,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:45:05,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2024-06-21 15:45:05,277 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5192307692307693 [2024-06-21 15:45:05,277 INFO L175 Difference]: Start difference. First operand has 121 places, 85 transitions, 621 flow. Second operand 8 states and 162 transitions. [2024-06-21 15:45:05,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 101 transitions, 881 flow [2024-06-21 15:45:05,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 101 transitions, 843 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-21 15:45:05,292 INFO L231 Difference]: Finished difference. Result has 116 places, 81 transitions, 579 flow [2024-06-21 15:45:05,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=583, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=579, PETRI_PLACES=116, PETRI_TRANSITIONS=81} [2024-06-21 15:45:05,292 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 76 predicate places. [2024-06-21 15:45:05,292 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 81 transitions, 579 flow [2024-06-21 15:45:05,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:05,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:45:05,293 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:45:05,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-21 15:45:05,293 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:45:05,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:45:05,293 INFO L85 PathProgramCache]: Analyzing trace with hash 63353057, now seen corresponding path program 9 times [2024-06-21 15:45:05,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:45:05,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026710744] [2024-06-21 15:45:05,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:45:05,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:45:05,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:45:05,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:45:05,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:45:05,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026710744] [2024-06-21 15:45:05,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026710744] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:45:05,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:45:05,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:45:05,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882376815] [2024-06-21 15:45:05,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:45:05,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:45:05,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:45:05,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:45:05,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:45:05,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 15:45:05,409 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 81 transitions, 579 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:05,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:45:05,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 15:45:05,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:45:05,567 INFO L124 PetriNetUnfolderBase]: 757/1314 cut-off events. [2024-06-21 15:45:05,567 INFO L125 PetriNetUnfolderBase]: For 22353/22353 co-relation queries the response was YES. [2024-06-21 15:45:05,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5427 conditions, 1314 events. 757/1314 cut-off events. For 22353/22353 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 7096 event pairs, 217 based on Foata normal form. 18/1332 useless extension candidates. Maximal degree in co-relation 5377. Up to 826 conditions per place. [2024-06-21 15:45:05,574 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 72 selfloop transitions, 17 changer transitions 8/104 dead transitions. [2024-06-21 15:45:05,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 104 transitions, 920 flow [2024-06-21 15:45:05,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 15:45:05,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 15:45:05,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 184 transitions. [2024-06-21 15:45:05,577 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5242165242165242 [2024-06-21 15:45:05,577 INFO L175 Difference]: Start difference. First operand has 116 places, 81 transitions, 579 flow. Second operand 9 states and 184 transitions. [2024-06-21 15:45:05,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 104 transitions, 920 flow [2024-06-21 15:45:05,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 104 transitions, 877 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-21 15:45:05,592 INFO L231 Difference]: Finished difference. Result has 115 places, 80 transitions, 571 flow [2024-06-21 15:45:05,592 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=538, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=571, PETRI_PLACES=115, PETRI_TRANSITIONS=80} [2024-06-21 15:45:05,592 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 75 predicate places. [2024-06-21 15:45:05,593 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 80 transitions, 571 flow [2024-06-21 15:45:05,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:05,593 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:45:05,593 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:45:05,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-21 15:45:05,593 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:45:05,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:45:05,593 INFO L85 PathProgramCache]: Analyzing trace with hash 1265840131, now seen corresponding path program 10 times [2024-06-21 15:45:05,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:45:05,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723322900] [2024-06-21 15:45:05,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:45:05,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:45:05,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:45:05,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:45:05,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:45:05,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723322900] [2024-06-21 15:45:05,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723322900] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:45:05,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:45:05,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:45:05,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170563553] [2024-06-21 15:45:05,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:45:05,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:45:05,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:45:05,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:45:05,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:45:05,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 15:45:05,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 80 transitions, 571 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:05,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:45:05,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 15:45:05,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:45:05,854 INFO L124 PetriNetUnfolderBase]: 652/1129 cut-off events. [2024-06-21 15:45:05,855 INFO L125 PetriNetUnfolderBase]: For 16493/16493 co-relation queries the response was YES. [2024-06-21 15:45:05,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4457 conditions, 1129 events. 652/1129 cut-off events. For 16493/16493 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 5841 event pairs, 195 based on Foata normal form. 18/1147 useless extension candidates. Maximal degree in co-relation 4407. Up to 826 conditions per place. [2024-06-21 15:45:05,861 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 66 selfloop transitions, 15 changer transitions 11/99 dead transitions. [2024-06-21 15:45:05,861 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 99 transitions, 833 flow [2024-06-21 15:45:05,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 15:45:05,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 15:45:05,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 181 transitions. [2024-06-21 15:45:05,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5156695156695157 [2024-06-21 15:45:05,862 INFO L175 Difference]: Start difference. First operand has 115 places, 80 transitions, 571 flow. Second operand 9 states and 181 transitions. [2024-06-21 15:45:05,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 99 transitions, 833 flow [2024-06-21 15:45:05,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 99 transitions, 795 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-21 15:45:05,874 INFO L231 Difference]: Finished difference. Result has 115 places, 75 transitions, 528 flow [2024-06-21 15:45:05,874 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=533, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=528, PETRI_PLACES=115, PETRI_TRANSITIONS=75} [2024-06-21 15:45:05,874 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 75 predicate places. [2024-06-21 15:45:05,874 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 75 transitions, 528 flow [2024-06-21 15:45:05,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:05,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:45:05,875 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:45:05,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-21 15:45:05,875 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:45:05,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:45:05,875 INFO L85 PathProgramCache]: Analyzing trace with hash -9041131, now seen corresponding path program 11 times [2024-06-21 15:45:05,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:45:05,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928814024] [2024-06-21 15:45:05,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:45:05,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:45:05,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:45:05,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:45:05,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:45:05,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928814024] [2024-06-21 15:45:05,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928814024] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:45:05,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:45:05,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:45:05,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509102681] [2024-06-21 15:45:05,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:45:05,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:45:05,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:45:05,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:45:05,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:45:06,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 15:45:06,035 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 75 transitions, 528 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:06,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:45:06,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 15:45:06,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:45:06,212 INFO L124 PetriNetUnfolderBase]: 724/1261 cut-off events. [2024-06-21 15:45:06,212 INFO L125 PetriNetUnfolderBase]: For 22053/22053 co-relation queries the response was YES. [2024-06-21 15:45:06,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5246 conditions, 1261 events. 724/1261 cut-off events. For 22053/22053 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 6740 event pairs, 100 based on Foata normal form. 18/1279 useless extension candidates. Maximal degree in co-relation 5197. Up to 734 conditions per place. [2024-06-21 15:45:06,219 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 70 selfloop transitions, 22 changer transitions 8/107 dead transitions. [2024-06-21 15:45:06,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 107 transitions, 909 flow [2024-06-21 15:45:06,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 15:45:06,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 15:45:06,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 224 transitions. [2024-06-21 15:45:06,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5221445221445221 [2024-06-21 15:45:06,221 INFO L175 Difference]: Start difference. First operand has 115 places, 75 transitions, 528 flow. Second operand 11 states and 224 transitions. [2024-06-21 15:45:06,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 107 transitions, 909 flow [2024-06-21 15:45:06,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 107 transitions, 855 flow, removed 2 selfloop flow, removed 13 redundant places. [2024-06-21 15:45:06,235 INFO L231 Difference]: Finished difference. Result has 112 places, 74 transitions, 518 flow [2024-06-21 15:45:06,235 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=476, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=518, PETRI_PLACES=112, PETRI_TRANSITIONS=74} [2024-06-21 15:45:06,236 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 72 predicate places. [2024-06-21 15:45:06,236 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 74 transitions, 518 flow [2024-06-21 15:45:06,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:06,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:45:06,236 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:45:06,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-21 15:45:06,236 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:45:06,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:45:06,237 INFO L85 PathProgramCache]: Analyzing trace with hash -1633105389, now seen corresponding path program 12 times [2024-06-21 15:45:06,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:45:06,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800424542] [2024-06-21 15:45:06,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:45:06,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:45:06,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:45:06,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:45:06,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:45:06,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800424542] [2024-06-21 15:45:06,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800424542] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:45:06,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:45:06,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:45:06,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156070688] [2024-06-21 15:45:06,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:45:06,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:45:06,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:45:06,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:45:06,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:45:06,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 15:45:06,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 74 transitions, 518 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:06,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:45:06,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 15:45:06,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:45:06,534 INFO L124 PetriNetUnfolderBase]: 619/1074 cut-off events. [2024-06-21 15:45:06,535 INFO L125 PetriNetUnfolderBase]: For 15981/15981 co-relation queries the response was YES. [2024-06-21 15:45:06,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4271 conditions, 1074 events. 619/1074 cut-off events. For 15981/15981 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 5462 event pairs, 88 based on Foata normal form. 18/1092 useless extension candidates. Maximal degree in co-relation 4223. Up to 734 conditions per place. [2024-06-21 15:45:06,540 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 58 selfloop transitions, 18 changer transitions 13/96 dead transitions. [2024-06-21 15:45:06,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 96 transitions, 788 flow [2024-06-21 15:45:06,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 15:45:06,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 15:45:06,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 185 transitions. [2024-06-21 15:45:06,541 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5270655270655271 [2024-06-21 15:45:06,541 INFO L175 Difference]: Start difference. First operand has 112 places, 74 transitions, 518 flow. Second operand 9 states and 185 transitions. [2024-06-21 15:45:06,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 96 transitions, 788 flow [2024-06-21 15:45:06,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 96 transitions, 740 flow, removed 1 selfloop flow, removed 10 redundant places. [2024-06-21 15:45:06,552 INFO L231 Difference]: Finished difference. Result has 110 places, 71 transitions, 485 flow [2024-06-21 15:45:06,552 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=470, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=485, PETRI_PLACES=110, PETRI_TRANSITIONS=71} [2024-06-21 15:45:06,552 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 70 predicate places. [2024-06-21 15:45:06,552 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 71 transitions, 485 flow [2024-06-21 15:45:06,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:06,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:45:06,553 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:45:06,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-21 15:45:06,553 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:45:06,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:45:06,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1632903579, now seen corresponding path program 13 times [2024-06-21 15:45:06,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:45:06,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272777141] [2024-06-21 15:45:06,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:45:06,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:45:06,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:45:06,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:45:06,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:45:06,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272777141] [2024-06-21 15:45:06,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272777141] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:45:06,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:45:06,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:45:06,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716340589] [2024-06-21 15:45:06,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:45:06,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:45:06,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:45:06,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:45:06,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:45:06,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 15:45:06,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 71 transitions, 485 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 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) [2024-06-21 15:45:06,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:45:06,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 15:45:06,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:45:06,785 INFO L124 PetriNetUnfolderBase]: 611/1058 cut-off events. [2024-06-21 15:45:06,786 INFO L125 PetriNetUnfolderBase]: For 15942/15942 co-relation queries the response was YES. [2024-06-21 15:45:06,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4178 conditions, 1058 events. 611/1058 cut-off events. For 15942/15942 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 5340 event pairs, 81 based on Foata normal form. 18/1074 useless extension candidates. Maximal degree in co-relation 4131. Up to 698 conditions per place. [2024-06-21 15:45:06,791 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 52 selfloop transitions, 13 changer transitions 21/93 dead transitions. [2024-06-21 15:45:06,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 93 transitions, 752 flow [2024-06-21 15:45:06,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:45:06,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:45:06,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 167 transitions. [2024-06-21 15:45:06,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5352564102564102 [2024-06-21 15:45:06,792 INFO L175 Difference]: Start difference. First operand has 110 places, 71 transitions, 485 flow. Second operand 8 states and 167 transitions. [2024-06-21 15:45:06,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 93 transitions, 752 flow [2024-06-21 15:45:06,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 93 transitions, 706 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-21 15:45:06,803 INFO L231 Difference]: Finished difference. Result has 105 places, 65 transitions, 427 flow [2024-06-21 15:45:06,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=439, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=427, PETRI_PLACES=105, PETRI_TRANSITIONS=65} [2024-06-21 15:45:06,804 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 65 predicate places. [2024-06-21 15:45:06,804 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 65 transitions, 427 flow [2024-06-21 15:45:06,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 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) [2024-06-21 15:45:06,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:45:06,804 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:45:06,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-21 15:45:06,804 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:45:06,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:45:06,805 INFO L85 PathProgramCache]: Analyzing trace with hash 833172113, now seen corresponding path program 14 times [2024-06-21 15:45:06,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:45:06,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615843543] [2024-06-21 15:45:06,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:45:06,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:45:06,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:45:06,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:45:06,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:45:06,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615843543] [2024-06-21 15:45:06,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615843543] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:45:06,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:45:06,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:45:06,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407833466] [2024-06-21 15:45:06,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:45:06,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:45:06,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:45:06,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:45:06,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:45:06,931 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 15:45:06,932 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 65 transitions, 427 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:06,932 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:45:06,932 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 15:45:06,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:45:07,092 INFO L124 PetriNetUnfolderBase]: 692/1191 cut-off events. [2024-06-21 15:45:07,092 INFO L125 PetriNetUnfolderBase]: For 26106/26106 co-relation queries the response was YES. [2024-06-21 15:45:07,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5197 conditions, 1191 events. 692/1191 cut-off events. For 26106/26106 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 6252 event pairs, 289 based on Foata normal form. 24/1215 useless extension candidates. Maximal degree in co-relation 5151. Up to 719 conditions per place. [2024-06-21 15:45:07,099 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 56 selfloop transitions, 13 changer transitions 10/86 dead transitions. [2024-06-21 15:45:07,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 86 transitions, 725 flow [2024-06-21 15:45:07,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 15:45:07,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 15:45:07,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 197 transitions. [2024-06-21 15:45:07,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5051282051282051 [2024-06-21 15:45:07,100 INFO L175 Difference]: Start difference. First operand has 105 places, 65 transitions, 427 flow. Second operand 10 states and 197 transitions. [2024-06-21 15:45:07,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 86 transitions, 725 flow [2024-06-21 15:45:07,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 86 transitions, 661 flow, removed 3 selfloop flow, removed 12 redundant places. [2024-06-21 15:45:07,112 INFO L231 Difference]: Finished difference. Result has 99 places, 62 transitions, 374 flow [2024-06-21 15:45:07,112 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=365, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=374, PETRI_PLACES=99, PETRI_TRANSITIONS=62} [2024-06-21 15:45:07,113 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 59 predicate places. [2024-06-21 15:45:07,113 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 62 transitions, 374 flow [2024-06-21 15:45:07,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:07,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:45:07,113 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:45:07,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-21 15:45:07,113 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:45:07,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:45:07,114 INFO L85 PathProgramCache]: Analyzing trace with hash 794065867, now seen corresponding path program 15 times [2024-06-21 15:45:07,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:45:07,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723970934] [2024-06-21 15:45:07,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:45:07,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:45:07,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:45:07,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:45:07,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:45:07,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723970934] [2024-06-21 15:45:07,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723970934] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:45:07,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:45:07,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:45:07,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555321789] [2024-06-21 15:45:07,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:45:07,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:45:07,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:45:07,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:45:07,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:45:07,238 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 15:45:07,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 62 transitions, 374 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:07,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:45:07,239 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 15:45:07,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:45:07,368 INFO L124 PetriNetUnfolderBase]: 802/1397 cut-off events. [2024-06-21 15:45:07,368 INFO L125 PetriNetUnfolderBase]: For 35532/35532 co-relation queries the response was YES. [2024-06-21 15:45:07,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6521 conditions, 1397 events. 802/1397 cut-off events. For 35532/35532 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 7829 event pairs, 346 based on Foata normal form. 18/1415 useless extension candidates. Maximal degree in co-relation 6479. Up to 527 conditions per place. [2024-06-21 15:45:07,375 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 57 selfloop transitions, 13 changer transitions 13/90 dead transitions. [2024-06-21 15:45:07,375 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 90 transitions, 752 flow [2024-06-21 15:45:07,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 15:45:07,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 15:45:07,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 206 transitions. [2024-06-21 15:45:07,376 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5282051282051282 [2024-06-21 15:45:07,376 INFO L175 Difference]: Start difference. First operand has 99 places, 62 transitions, 374 flow. Second operand 10 states and 206 transitions. [2024-06-21 15:45:07,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 90 transitions, 752 flow [2024-06-21 15:45:07,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 90 transitions, 717 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-21 15:45:07,389 INFO L231 Difference]: Finished difference. Result has 98 places, 59 transitions, 360 flow [2024-06-21 15:45:07,389 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=347, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=360, PETRI_PLACES=98, PETRI_TRANSITIONS=59} [2024-06-21 15:45:07,390 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 58 predicate places. [2024-06-21 15:45:07,390 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 59 transitions, 360 flow [2024-06-21 15:45:07,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:07,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:45:07,390 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:45:07,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-21 15:45:07,390 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:45:07,391 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:45:07,391 INFO L85 PathProgramCache]: Analyzing trace with hash 68978935, now seen corresponding path program 16 times [2024-06-21 15:45:07,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:45:07,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293445673] [2024-06-21 15:45:07,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:45:07,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:45:07,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:45:07,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:45:07,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:45:07,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293445673] [2024-06-21 15:45:07,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293445673] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:45:07,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:45:07,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:45:07,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480189013] [2024-06-21 15:45:07,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:45:07,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:45:07,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:45:07,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:45:07,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:45:07,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 15:45:07,528 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 59 transitions, 360 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:07,528 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:45:07,528 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 15:45:07,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:45:07,660 INFO L124 PetriNetUnfolderBase]: 659/1148 cut-off events. [2024-06-21 15:45:07,660 INFO L125 PetriNetUnfolderBase]: For 27356/27356 co-relation queries the response was YES. [2024-06-21 15:45:07,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5082 conditions, 1148 events. 659/1148 cut-off events. For 27356/27356 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 6083 event pairs, 374 based on Foata normal form. 26/1174 useless extension candidates. Maximal degree in co-relation 5041. Up to 921 conditions per place. [2024-06-21 15:45:07,665 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 43 selfloop transitions, 8 changer transitions 14/72 dead transitions. [2024-06-21 15:45:07,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 72 transitions, 540 flow [2024-06-21 15:45:07,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 15:45:07,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 15:45:07,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-21 15:45:07,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49002849002849 [2024-06-21 15:45:07,666 INFO L175 Difference]: Start difference. First operand has 98 places, 59 transitions, 360 flow. Second operand 9 states and 172 transitions. [2024-06-21 15:45:07,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 72 transitions, 540 flow [2024-06-21 15:45:07,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 72 transitions, 510 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-21 15:45:07,677 INFO L231 Difference]: Finished difference. Result has 94 places, 54 transitions, 315 flow [2024-06-21 15:45:07,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=330, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=315, PETRI_PLACES=94, PETRI_TRANSITIONS=54} [2024-06-21 15:45:07,677 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 54 predicate places. [2024-06-21 15:45:07,677 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 54 transitions, 315 flow [2024-06-21 15:45:07,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:07,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:45:07,678 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, 1] [2024-06-21 15:45:07,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-21 15:45:07,678 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:45:07,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:45:07,678 INFO L85 PathProgramCache]: Analyzing trace with hash -1909175903, now seen corresponding path program 17 times [2024-06-21 15:45:07,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:45:07,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112175317] [2024-06-21 15:45:07,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:45:07,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:45:07,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:45:07,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:45:07,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:45:07,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112175317] [2024-06-21 15:45:07,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112175317] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:45:07,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:45:07,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:45:07,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350131571] [2024-06-21 15:45:07,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:45:07,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:45:07,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:45:07,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:45:07,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:45:07,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 15:45:07,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 54 transitions, 315 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:07,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:45:07,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 15:45:07,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:45:07,966 INFO L124 PetriNetUnfolderBase]: 542/963 cut-off events. [2024-06-21 15:45:07,966 INFO L125 PetriNetUnfolderBase]: For 16324/16324 co-relation queries the response was YES. [2024-06-21 15:45:07,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3910 conditions, 963 events. 542/963 cut-off events. For 16324/16324 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 4904 event pairs, 186 based on Foata normal form. 18/981 useless extension candidates. Maximal degree in co-relation 3871. Up to 568 conditions per place. [2024-06-21 15:45:07,970 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 54 selfloop transitions, 9 changer transitions 12/82 dead transitions. [2024-06-21 15:45:07,970 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 82 transitions, 613 flow [2024-06-21 15:45:07,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 15:45:07,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 15:45:07,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 213 transitions. [2024-06-21 15:45:07,971 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4965034965034965 [2024-06-21 15:45:07,971 INFO L175 Difference]: Start difference. First operand has 94 places, 54 transitions, 315 flow. Second operand 11 states and 213 transitions. [2024-06-21 15:45:07,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 82 transitions, 613 flow [2024-06-21 15:45:07,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 82 transitions, 560 flow, removed 15 selfloop flow, removed 10 redundant places. [2024-06-21 15:45:07,978 INFO L231 Difference]: Finished difference. Result has 89 places, 52 transitions, 289 flow [2024-06-21 15:45:07,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=280, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=289, PETRI_PLACES=89, PETRI_TRANSITIONS=52} [2024-06-21 15:45:07,978 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 49 predicate places. [2024-06-21 15:45:07,978 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 52 transitions, 289 flow [2024-06-21 15:45:07,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:07,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:45:07,978 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:45:07,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-21 15:45:07,979 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:45:07,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:45:07,979 INFO L85 PathProgramCache]: Analyzing trace with hash -1064905181, now seen corresponding path program 18 times [2024-06-21 15:45:07,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:45:07,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459877707] [2024-06-21 15:45:07,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:45:07,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:45:07,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:45:08,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:45:08,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:45:08,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459877707] [2024-06-21 15:45:08,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459877707] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:45:08,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:45:08,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:45:08,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738775193] [2024-06-21 15:45:08,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:45:08,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:45:08,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:45:08,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:45:08,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:45:08,121 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 15:45:08,122 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 52 transitions, 289 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:08,122 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:45:08,122 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 15:45:08,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:45:08,227 INFO L124 PetriNetUnfolderBase]: 437/776 cut-off events. [2024-06-21 15:45:08,228 INFO L125 PetriNetUnfolderBase]: For 9436/9436 co-relation queries the response was YES. [2024-06-21 15:45:08,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2774 conditions, 776 events. 437/776 cut-off events. For 9436/9436 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 3689 event pairs, 174 based on Foata normal form. 18/794 useless extension candidates. Maximal degree in co-relation 2739. Up to 568 conditions per place. [2024-06-21 15:45:08,231 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 39 selfloop transitions, 5 changer transitions 18/69 dead transitions. [2024-06-21 15:45:08,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 69 transitions, 465 flow [2024-06-21 15:45:08,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 15:45:08,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 15:45:08,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-21 15:45:08,232 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49002849002849 [2024-06-21 15:45:08,232 INFO L175 Difference]: Start difference. First operand has 89 places, 52 transitions, 289 flow. Second operand 9 states and 172 transitions. [2024-06-21 15:45:08,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 69 transitions, 465 flow [2024-06-21 15:45:08,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 69 transitions, 444 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-21 15:45:08,236 INFO L231 Difference]: Finished difference. Result has 86 places, 48 transitions, 257 flow [2024-06-21 15:45:08,236 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=268, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=257, PETRI_PLACES=86, PETRI_TRANSITIONS=48} [2024-06-21 15:45:08,237 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 46 predicate places. [2024-06-21 15:45:08,237 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 48 transitions, 257 flow [2024-06-21 15:45:08,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:08,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:45:08,237 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:45:08,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-21 15:45:08,237 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:45:08,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:45:08,238 INFO L85 PathProgramCache]: Analyzing trace with hash 2091878547, now seen corresponding path program 19 times [2024-06-21 15:45:08,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:45:08,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707901754] [2024-06-21 15:45:08,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:45:08,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:45:08,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:45:08,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:45:08,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:45:08,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707901754] [2024-06-21 15:45:08,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707901754] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:45:08,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:45:08,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:45:08,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286927612] [2024-06-21 15:45:08,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:45:08,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:45:08,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:45:08,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:45:08,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:45:08,385 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 15:45:08,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 48 transitions, 257 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:08,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:45:08,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 15:45:08,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:45:08,474 INFO L124 PetriNetUnfolderBase]: 394/699 cut-off events. [2024-06-21 15:45:08,475 INFO L125 PetriNetUnfolderBase]: For 8470/8470 co-relation queries the response was YES. [2024-06-21 15:45:08,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2387 conditions, 699 events. 394/699 cut-off events. For 8470/8470 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 3228 event pairs, 145 based on Foata normal form. 24/723 useless extension candidates. Maximal degree in co-relation 2353. Up to 422 conditions per place. [2024-06-21 15:45:08,478 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 33 selfloop transitions, 3 changer transitions 25/68 dead transitions. [2024-06-21 15:45:08,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 68 transitions, 455 flow [2024-06-21 15:45:08,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 15:45:08,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 15:45:08,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-21 15:45:08,484 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4985754985754986 [2024-06-21 15:45:08,484 INFO L175 Difference]: Start difference. First operand has 86 places, 48 transitions, 257 flow. Second operand 9 states and 175 transitions. [2024-06-21 15:45:08,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 68 transitions, 455 flow [2024-06-21 15:45:08,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 68 transitions, 439 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-21 15:45:08,488 INFO L231 Difference]: Finished difference. Result has 79 places, 41 transitions, 205 flow [2024-06-21 15:45:08,488 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=241, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=205, PETRI_PLACES=79, PETRI_TRANSITIONS=41} [2024-06-21 15:45:08,488 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 39 predicate places. [2024-06-21 15:45:08,488 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 41 transitions, 205 flow [2024-06-21 15:45:08,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:08,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:45:08,489 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:45:08,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-21 15:45:08,490 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:45:08,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:45:08,491 INFO L85 PathProgramCache]: Analyzing trace with hash 1683908181, now seen corresponding path program 20 times [2024-06-21 15:45:08,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:45:08,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303295162] [2024-06-21 15:45:08,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:45:08,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:45:08,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:45:08,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:45:08,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:45:08,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303295162] [2024-06-21 15:45:08,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303295162] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:45:08,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:45:08,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:45:08,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158064435] [2024-06-21 15:45:08,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:45:08,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:45:08,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:45:08,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:45:08,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:45:08,634 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 15:45:08,635 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 41 transitions, 205 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 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) [2024-06-21 15:45:08,635 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:45:08,635 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 15:45:08,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:45:08,728 INFO L124 PetriNetUnfolderBase]: 393/709 cut-off events. [2024-06-21 15:45:08,729 INFO L125 PetriNetUnfolderBase]: For 8652/8652 co-relation queries the response was YES. [2024-06-21 15:45:08,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2608 conditions, 709 events. 393/709 cut-off events. For 8652/8652 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3381 event pairs, 71 based on Foata normal form. 18/726 useless extension candidates. Maximal degree in co-relation 2576. Up to 204 conditions per place. [2024-06-21 15:45:08,731 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 39 selfloop transitions, 12 changer transitions 13/71 dead transitions. [2024-06-21 15:45:08,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 71 transitions, 469 flow [2024-06-21 15:45:08,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 15:45:08,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 15:45:08,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 200 transitions. [2024-06-21 15:45:08,733 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5128205128205128 [2024-06-21 15:45:08,734 INFO L175 Difference]: Start difference. First operand has 79 places, 41 transitions, 205 flow. Second operand 10 states and 200 transitions. [2024-06-21 15:45:08,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 71 transitions, 469 flow [2024-06-21 15:45:08,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 71 transitions, 441 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-21 15:45:08,738 INFO L231 Difference]: Finished difference. Result has 71 places, 38 transitions, 196 flow [2024-06-21 15:45:08,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=187, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=196, PETRI_PLACES=71, PETRI_TRANSITIONS=38} [2024-06-21 15:45:08,742 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 31 predicate places. [2024-06-21 15:45:08,742 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 38 transitions, 196 flow [2024-06-21 15:45:08,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 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) [2024-06-21 15:45:08,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:45:08,742 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:45:08,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-21 15:45:08,742 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:45:08,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:45:08,742 INFO L85 PathProgramCache]: Analyzing trace with hash 1404189357, now seen corresponding path program 21 times [2024-06-21 15:45:08,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:45:08,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888046821] [2024-06-21 15:45:08,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:45:08,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:45:08,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:45:08,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:45:08,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:45:08,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888046821] [2024-06-21 15:45:08,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888046821] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:45:08,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:45:08,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:45:08,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112322055] [2024-06-21 15:45:08,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:45:08,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:45:08,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:45:08,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:45:08,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:45:08,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 15:45:08,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 38 transitions, 196 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:08,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:45:08,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 15:45:08,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:45:09,038 INFO L124 PetriNetUnfolderBase]: 450/813 cut-off events. [2024-06-21 15:45:09,038 INFO L125 PetriNetUnfolderBase]: For 7120/7120 co-relation queries the response was YES. [2024-06-21 15:45:09,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3033 conditions, 813 events. 450/813 cut-off events. For 7120/7120 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 4097 event pairs, 110 based on Foata normal form. 18/831 useless extension candidates. Maximal degree in co-relation 3005. Up to 387 conditions per place. [2024-06-21 15:45:09,041 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 41 selfloop transitions, 12 changer transitions 12/72 dead transitions. [2024-06-21 15:45:09,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 72 transitions, 467 flow [2024-06-21 15:45:09,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 15:45:09,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 15:45:09,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 233 transitions. [2024-06-21 15:45:09,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49786324786324787 [2024-06-21 15:45:09,042 INFO L175 Difference]: Start difference. First operand has 71 places, 38 transitions, 196 flow. Second operand 12 states and 233 transitions. [2024-06-21 15:45:09,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 72 transitions, 467 flow [2024-06-21 15:45:09,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 72 transitions, 423 flow, removed 10 selfloop flow, removed 10 redundant places. [2024-06-21 15:45:09,045 INFO L231 Difference]: Finished difference. Result has 70 places, 37 transitions, 190 flow [2024-06-21 15:45:09,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=190, PETRI_PLACES=70, PETRI_TRANSITIONS=37} [2024-06-21 15:45:09,045 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 30 predicate places. [2024-06-21 15:45:09,045 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 37 transitions, 190 flow [2024-06-21 15:45:09,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:09,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:45:09,045 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:45:09,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-21 15:45:09,045 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:45:09,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:45:09,046 INFO L85 PathProgramCache]: Analyzing trace with hash 878632425, now seen corresponding path program 22 times [2024-06-21 15:45:09,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:45:09,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366136170] [2024-06-21 15:45:09,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:45:09,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:45:09,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:45:09,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:45:09,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:45:09,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366136170] [2024-06-21 15:45:09,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366136170] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:45:09,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:45:09,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:45:09,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346562629] [2024-06-21 15:45:09,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:45:09,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:45:09,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:45:09,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:45:09,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:45:09,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 15:45:09,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 37 transitions, 190 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:09,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:45:09,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 15:45:09,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:45:09,336 INFO L124 PetriNetUnfolderBase]: 426/781 cut-off events. [2024-06-21 15:45:09,337 INFO L125 PetriNetUnfolderBase]: For 5076/5076 co-relation queries the response was YES. [2024-06-21 15:45:09,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2773 conditions, 781 events. 426/781 cut-off events. For 5076/5076 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 4014 event pairs, 82 based on Foata normal form. 18/799 useless extension candidates. Maximal degree in co-relation 2747. Up to 351 conditions per place. [2024-06-21 15:45:09,339 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 40 selfloop transitions, 11 changer transitions 8/66 dead transitions. [2024-06-21 15:45:09,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 66 transitions, 416 flow [2024-06-21 15:45:09,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 15:45:09,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 15:45:09,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 213 transitions. [2024-06-21 15:45:09,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4965034965034965 [2024-06-21 15:45:09,340 INFO L175 Difference]: Start difference. First operand has 70 places, 37 transitions, 190 flow. Second operand 11 states and 213 transitions. [2024-06-21 15:45:09,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 66 transitions, 416 flow [2024-06-21 15:45:09,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 66 transitions, 387 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-21 15:45:09,343 INFO L231 Difference]: Finished difference. Result has 69 places, 35 transitions, 178 flow [2024-06-21 15:45:09,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=178, PETRI_PLACES=69, PETRI_TRANSITIONS=35} [2024-06-21 15:45:09,343 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 29 predicate places. [2024-06-21 15:45:09,343 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 35 transitions, 178 flow [2024-06-21 15:45:09,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:09,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:45:09,344 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:45:09,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-21 15:45:09,344 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:45:09,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:45:09,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1559041631, now seen corresponding path program 23 times [2024-06-21 15:45:09,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:45:09,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296161696] [2024-06-21 15:45:09,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:45:09,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:45:09,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:45:09,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:45:09,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:45:09,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296161696] [2024-06-21 15:45:09,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296161696] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:45:09,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:45:09,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:45:09,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351579737] [2024-06-21 15:45:09,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:45:09,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:45:09,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:45:09,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:45:09,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:45:09,500 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 15:45:09,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 35 transitions, 178 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:09,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:45:09,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 15:45:09,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:45:09,599 INFO L124 PetriNetUnfolderBase]: 321/590 cut-off events. [2024-06-21 15:45:09,599 INFO L125 PetriNetUnfolderBase]: For 3306/3306 co-relation queries the response was YES. [2024-06-21 15:45:09,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2042 conditions, 590 events. 321/590 cut-off events. For 3306/3306 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 2763 event pairs, 106 based on Foata normal form. 18/608 useless extension candidates. Maximal degree in co-relation 2017. Up to 375 conditions per place. [2024-06-21 15:45:09,601 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 24 selfloop transitions, 6 changer transitions 16/53 dead transitions. [2024-06-21 15:45:09,601 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 53 transitions, 320 flow [2024-06-21 15:45:09,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 15:45:09,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 15:45:09,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-21 15:45:09,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49002849002849 [2024-06-21 15:45:09,602 INFO L175 Difference]: Start difference. First operand has 69 places, 35 transitions, 178 flow. Second operand 9 states and 172 transitions. [2024-06-21 15:45:09,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 53 transitions, 320 flow [2024-06-21 15:45:09,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 53 transitions, 289 flow, removed 3 selfloop flow, removed 11 redundant places. [2024-06-21 15:45:09,604 INFO L231 Difference]: Finished difference. Result has 65 places, 31 transitions, 141 flow [2024-06-21 15:45:09,604 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=147, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=141, PETRI_PLACES=65, PETRI_TRANSITIONS=31} [2024-06-21 15:45:09,604 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 25 predicate places. [2024-06-21 15:45:09,604 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 31 transitions, 141 flow [2024-06-21 15:45:09,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:09,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:45:09,605 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:45:09,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-21 15:45:09,605 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:45:09,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:45:09,605 INFO L85 PathProgramCache]: Analyzing trace with hash 1536091191, now seen corresponding path program 24 times [2024-06-21 15:45:09,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:45:09,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274445021] [2024-06-21 15:45:09,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:45:09,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:45:09,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:45:09,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:45:09,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:45:09,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274445021] [2024-06-21 15:45:09,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274445021] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:45:09,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:45:09,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:45:09,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231881463] [2024-06-21 15:45:09,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:45:09,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:45:09,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:45:09,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:45:09,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:45:09,696 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 15:45:09,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 31 transitions, 141 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:09,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:45:09,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 15:45:09,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:45:09,767 INFO L124 PetriNetUnfolderBase]: 208/395 cut-off events. [2024-06-21 15:45:09,768 INFO L125 PetriNetUnfolderBase]: For 1790/1790 co-relation queries the response was YES. [2024-06-21 15:45:09,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1250 conditions, 395 events. 208/395 cut-off events. For 1790/1790 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1641 event pairs, 12 based on Foata normal form. 18/413 useless extension candidates. Maximal degree in co-relation 1227. Up to 147 conditions per place. [2024-06-21 15:45:09,769 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 25 selfloop transitions, 6 changer transitions 17/55 dead transitions. [2024-06-21 15:45:09,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 55 transitions, 311 flow [2024-06-21 15:45:09,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 15:45:09,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 15:45:09,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 203 transitions. [2024-06-21 15:45:09,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4731934731934732 [2024-06-21 15:45:09,770 INFO L175 Difference]: Start difference. First operand has 65 places, 31 transitions, 141 flow. Second operand 11 states and 203 transitions. [2024-06-21 15:45:09,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 55 transitions, 311 flow [2024-06-21 15:45:09,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 55 transitions, 297 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-21 15:45:09,771 INFO L231 Difference]: Finished difference. Result has 63 places, 28 transitions, 126 flow [2024-06-21 15:45:09,771 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=126, PETRI_PLACES=63, PETRI_TRANSITIONS=28} [2024-06-21 15:45:09,771 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 23 predicate places. [2024-06-21 15:45:09,771 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 28 transitions, 126 flow [2024-06-21 15:45:09,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:09,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:45:09,772 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:45:09,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-21 15:45:09,772 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:45:09,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:45:09,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1539815841, now seen corresponding path program 25 times [2024-06-21 15:45:09,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:45:09,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284811245] [2024-06-21 15:45:09,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:45:09,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:45:09,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:45:09,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:45:09,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:45:09,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284811245] [2024-06-21 15:45:09,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284811245] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:45:09,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:45:09,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:45:09,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789821685] [2024-06-21 15:45:09,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:45:09,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:45:09,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:45:09,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:45:09,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:45:09,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 15:45:09,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 28 transitions, 126 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:09,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:45:09,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 15:45:09,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:45:10,012 INFO L124 PetriNetUnfolderBase]: 83/176 cut-off events. [2024-06-21 15:45:10,012 INFO L125 PetriNetUnfolderBase]: For 852/852 co-relation queries the response was YES. [2024-06-21 15:45:10,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 516 conditions, 176 events. 83/176 cut-off events. For 852/852 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 514 event pairs, 0 based on Foata normal form. 18/194 useless extension candidates. Maximal degree in co-relation 501. Up to 96 conditions per place. [2024-06-21 15:45:10,013 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 0 selfloop transitions, 0 changer transitions 39/39 dead transitions. [2024-06-21 15:45:10,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 39 transitions, 198 flow [2024-06-21 15:45:10,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 15:45:10,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 15:45:10,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-21 15:45:10,014 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.452991452991453 [2024-06-21 15:45:10,014 INFO L175 Difference]: Start difference. First operand has 63 places, 28 transitions, 126 flow. Second operand 9 states and 159 transitions. [2024-06-21 15:45:10,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 39 transitions, 198 flow [2024-06-21 15:45:10,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 39 transitions, 171 flow, removed 2 selfloop flow, removed 13 redundant places. [2024-06-21 15:45:10,015 INFO L231 Difference]: Finished difference. Result has 52 places, 0 transitions, 0 flow [2024-06-21 15:45:10,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=79, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=0, PETRI_PLACES=52, PETRI_TRANSITIONS=0} [2024-06-21 15:45:10,015 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 12 predicate places. [2024-06-21 15:45:10,015 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 0 transitions, 0 flow [2024-06-21 15:45:10,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:10,018 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (5 of 6 remaining) [2024-06-21 15:45:10,018 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 6 remaining) [2024-06-21 15:45:10,019 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 6 remaining) [2024-06-21 15:45:10,019 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 6 remaining) [2024-06-21 15:45:10,019 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 6 remaining) [2024-06-21 15:45:10,019 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 6 remaining) [2024-06-21 15:45:10,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-21 15:45:10,019 INFO L445 BasicCegarLoop]: Path program histogram: [25, 15, 12, 9, 7, 7, 6, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:45:10,027 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-06-21 15:45:10,027 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-06-21 15:45:10,031 INFO L507 ceAbstractionStarter]: Automizer considered 3 witness invariants [2024-06-21 15:45:10,031 INFO L508 ceAbstractionStarter]: WitnessConsidered=3 [2024-06-21 15:45:10,032 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.06 03:45:10 BasicIcfg [2024-06-21 15:45:10,032 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-06-21 15:45:10,032 INFO L158 Benchmark]: Toolchain (without parser) took 79389.11ms. Allocated memory was 176.2MB in the beginning and 5.7GB in the end (delta: 5.5GB). Free memory was 113.4MB in the beginning and 3.1GB in the end (delta: -3.0GB). Peak memory consumption was 2.5GB. Max. memory is 16.1GB. [2024-06-21 15:45:10,033 INFO L158 Benchmark]: Witness Parser took 0.19ms. Allocated memory is still 176.2MB. Free memory is still 136.4MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-21 15:45:10,033 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 176.2MB. Free memory is still 132.4MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-21 15:45:10,033 INFO L158 Benchmark]: CACSL2BoogieTranslator took 501.96ms. Allocated memory is still 176.2MB. Free memory was 113.4MB in the beginning and 86.5MB in the end (delta: 26.9MB). Peak memory consumption was 27.3MB. Max. memory is 16.1GB. [2024-06-21 15:45:10,033 INFO L158 Benchmark]: Boogie Procedure Inliner took 40.83ms. Allocated memory is still 176.2MB. Free memory was 86.5MB in the beginning and 84.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-21 15:45:10,033 INFO L158 Benchmark]: Boogie Preprocessor took 33.88ms. Allocated memory is still 176.2MB. Free memory was 84.4MB in the beginning and 81.9MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-21 15:45:10,034 INFO L158 Benchmark]: RCFGBuilder took 442.17ms. Allocated memory was 176.2MB in the beginning and 216.0MB in the end (delta: 39.8MB). Free memory was 81.9MB in the beginning and 169.9MB in the end (delta: -87.9MB). Peak memory consumption was 19.8MB. Max. memory is 16.1GB. [2024-06-21 15:45:10,034 INFO L158 Benchmark]: TraceAbstraction took 78365.70ms. Allocated memory was 216.0MB in the beginning and 5.7GB in the end (delta: 5.5GB). Free memory was 168.8MB in the beginning and 3.1GB in the end (delta: -2.9GB). Peak memory consumption was 2.5GB. Max. memory is 16.1GB. [2024-06-21 15:45:10,035 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Witness Parser took 0.19ms. Allocated memory is still 176.2MB. Free memory is still 136.4MB. There was no memory consumed. Max. memory is 16.1GB. * CDTParser took 0.14ms. Allocated memory is still 176.2MB. Free memory is still 132.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 501.96ms. Allocated memory is still 176.2MB. Free memory was 113.4MB in the beginning and 86.5MB in the end (delta: 26.9MB). Peak memory consumption was 27.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 40.83ms. Allocated memory is still 176.2MB. Free memory was 86.5MB in the beginning and 84.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 33.88ms. Allocated memory is still 176.2MB. Free memory was 84.4MB in the beginning and 81.9MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 442.17ms. Allocated memory was 176.2MB in the beginning and 216.0MB in the end (delta: 39.8MB). Free memory was 81.9MB in the beginning and 169.9MB in the end (delta: -87.9MB). Peak memory consumption was 19.8MB. Max. memory is 16.1GB. * TraceAbstraction took 78365.70ms. Allocated memory was 216.0MB in the beginning and 5.7GB in the end (delta: 5.5GB). Free memory was 168.8MB in the beginning and 3.1GB in the end (delta: -2.9GB). Peak memory consumption was 2.5GB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 776]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 778]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 779]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 63 locations, 6 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 78.3s, OverallIterations: 133, TraceHistogramMax: 1, PathProgramHistogramMax: 25, EmptinessCheckTime: 0.0s, AutomataDifference: 66.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 9297 SdHoareTripleChecker+Valid, 15.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 7596 mSDsluCounter, 2792 SdHoareTripleChecker+Invalid, 12.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1861 mSDsCounter, 1365 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 33385 IncrementalHoareTripleChecker+Invalid, 34750 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1365 mSolverCounterUnsat, 931 mSDtfsCounter, 33385 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 999 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 999 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 845 ImplicationChecksByTransitivity, 5.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2218occurred in iteration=62, InterpolantAutomatonStates: 1055, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 10.0s InterpolantComputationTime, 2438 NumberOfCodeBlocks, 2438 NumberOfCodeBlocksAsserted, 133 NumberOfCheckSat, 2305 ConstructedInterpolants, 0 QuantifiedInterpolants, 21757 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 133 InterpolantComputations, 133 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 3 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-06-21 15:45:10,056 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE