./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe031_tso.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe031_tso.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe031_tso.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe031_tso.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-28 01:01:41,062 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-28 01:01:41,103 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-28 01:01:41,106 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-28 01:01:41,107 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-28 01:01:41,123 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-28 01:01:41,123 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-28 01:01:41,124 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-28 01:01:41,124 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-28 01:01:41,124 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-28 01:01:41,125 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-28 01:01:41,125 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-28 01:01:41,125 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-28 01:01:41,126 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-28 01:01:41,126 INFO L153 SettingsManager]: * Use SBE=true [2024-06-28 01:01:41,126 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-28 01:01:41,126 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-28 01:01:41,127 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-28 01:01:41,127 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-28 01:01:41,127 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-28 01:01:41,128 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-28 01:01:41,132 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-28 01:01:41,132 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-28 01:01:41,132 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-28 01:01:41,134 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-28 01:01:41,134 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-28 01:01:41,135 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-28 01:01:41,135 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-28 01:01:41,135 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-28 01:01:41,135 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-28 01:01:41,136 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-28 01:01:41,136 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-28 01:01:41,136 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 01:01:41,136 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-28 01:01:41,137 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-28 01:01:41,137 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-28 01:01:41,137 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-28 01:01:41,137 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-28 01:01:41,138 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-28 01:01:41,138 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-28 01:01:41,138 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-28 01:01:41,140 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-28 01:01:41,141 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-28 01:01:41,141 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-06-28 01:01:41,360 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-28 01:01:41,374 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-28 01:01:41,376 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-28 01:01:41,378 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-28 01:01:41,379 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-28 01:01:41,380 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe031_tso.yml/witness.yml [2024-06-28 01:01:41,475 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-28 01:01:41,475 INFO L274 PluginConnector]: CDTParser initialized [2024-06-28 01:01:41,475 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe031_tso.i [2024-06-28 01:01:42,413 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-28 01:01:42,626 INFO L384 CDTParser]: Found 1 translation units. [2024-06-28 01:01:42,627 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe031_tso.i [2024-06-28 01:01:42,645 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc53a1b26/3140976ab11847bc8bb20f754a1b6ce9/FLAG748f98205 [2024-06-28 01:01:42,662 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc53a1b26/3140976ab11847bc8bb20f754a1b6ce9 [2024-06-28 01:01:42,663 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-28 01:01:42,664 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-28 01:01:42,667 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-28 01:01:42,667 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-28 01:01:42,670 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-28 01:01:42,671 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 01:01:41" (1/2) ... [2024-06-28 01:01:42,672 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6dfe63aa and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 01:01:42, skipping insertion in model container [2024-06-28 01:01:42,672 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 01:01:41" (1/2) ... [2024-06-28 01:01:42,673 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5ca10fe2 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 01:01:42, skipping insertion in model container [2024-06-28 01:01:42,673 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 01:01:42" (2/2) ... [2024-06-28 01:01:42,674 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6dfe63aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 01:01:42, skipping insertion in model container [2024-06-28 01:01:42,674 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 01:01:42" (2/2) ... [2024-06-28 01:01:42,675 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-28 01:01:42,717 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-28 01:01:42,718 INFO L97 edCorrectnessWitness]: Location invariant before [L781-L781] (((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || ((((0 <= __unbuffered_cnt && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (x == 0 || x == 1)) && ((y == 0 || y == 1) || y == 2)) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || ((z == 0 || z == 1) || z == 2)) [2024-06-28 01:01:42,718 INFO L97 edCorrectnessWitness]: Location invariant before [L784-L784] (((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || ((((0 <= __unbuffered_cnt && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (x == 0 || x == 1)) && ((y == 0 || y == 1) || y == 2)) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || ((z == 0 || z == 1) || z == 2)) [2024-06-28 01:01:42,718 INFO L97 edCorrectnessWitness]: Location invariant before [L783-L783] (((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || ((((0 <= __unbuffered_cnt && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (x == 0 || x == 1)) && ((y == 0 || y == 1) || y == 2)) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || ((z == 0 || z == 1) || z == 2)) [2024-06-28 01:01:42,718 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-28 01:01:42,719 INFO L106 edCorrectnessWitness]: ghost_update [L779-L779] multithreaded = 1; [2024-06-28 01:01:42,757 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-28 01:01:42,888 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe031_tso.i[945,958] [2024-06-28 01:01:42,994 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 01:01:43,001 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local [2024-06-28 01:01:43,036 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe031_tso.i[945,958] Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-28 01:01:43,100 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 01:01:43,133 INFO L206 MainTranslator]: Completed translation [2024-06-28 01:01:43,134 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 01:01:43 WrapperNode [2024-06-28 01:01:43,134 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-28 01:01:43,135 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-28 01:01:43,135 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-28 01:01:43,135 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-28 01:01:43,140 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 01:01:43" (1/1) ... [2024-06-28 01:01:43,167 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 01:01:43" (1/1) ... [2024-06-28 01:01:43,186 INFO L138 Inliner]: procedures = 175, calls = 43, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 63 [2024-06-28 01:01:43,187 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-28 01:01:43,187 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-28 01:01:43,187 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-28 01:01:43,187 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-28 01:01:43,194 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 01:01:43" (1/1) ... [2024-06-28 01:01:43,195 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 01:01:43" (1/1) ... [2024-06-28 01:01:43,199 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 01:01:43" (1/1) ... [2024-06-28 01:01:43,217 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]. [2024-06-28 01:01:43,217 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 01:01:43" (1/1) ... [2024-06-28 01:01:43,217 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 01:01:43" (1/1) ... [2024-06-28 01:01:43,236 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 01:01:43" (1/1) ... [2024-06-28 01:01:43,238 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 01:01:43" (1/1) ... [2024-06-28 01:01:43,239 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 01:01:43" (1/1) ... [2024-06-28 01:01:43,239 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 01:01:43" (1/1) ... [2024-06-28 01:01:43,244 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-28 01:01:43,244 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-28 01:01:43,245 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-28 01:01:43,245 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-28 01:01:43,245 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 01:01:43" (1/1) ... [2024-06-28 01:01:43,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 01:01:43,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 01:01:43,273 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) [2024-06-28 01:01:43,274 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 [2024-06-28 01:01:43,317 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-28 01:01:43,317 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-28 01:01:43,317 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-28 01:01:43,317 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-28 01:01:43,317 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-28 01:01:43,317 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-28 01:01:43,318 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-28 01:01:43,318 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-28 01:01:43,318 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-28 01:01:43,318 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-28 01:01:43,318 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-28 01:01:43,318 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-28 01:01:43,319 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-28 01:01:43,440 INFO L244 CfgBuilder]: Building ICFG [2024-06-28 01:01:43,445 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-28 01:01:43,620 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-28 01:01:43,621 INFO L293 CfgBuilder]: Performing block encoding [2024-06-28 01:01:43,695 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-28 01:01:43,695 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-28 01:01:43,696 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 01:01:43 BoogieIcfgContainer [2024-06-28 01:01:43,696 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-28 01:01:43,697 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-28 01:01:43,697 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-28 01:01:43,700 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-28 01:01:43,700 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 01:01:41" (1/4) ... [2024-06-28 01:01:43,700 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11362996 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 28.06 01:01:43, skipping insertion in model container [2024-06-28 01:01:43,700 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.06 01:01:42" (2/4) ... [2024-06-28 01:01:43,701 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11362996 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.06 01:01:43, skipping insertion in model container [2024-06-28 01:01:43,701 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 01:01:43" (3/4) ... [2024-06-28 01:01:43,701 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11362996 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.06 01:01:43, skipping insertion in model container [2024-06-28 01:01:43,701 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 01:01:43" (4/4) ... [2024-06-28 01:01:43,702 INFO L112 eAbstractionObserver]: Analyzing ICFG safe031_tso.i [2024-06-28 01:01:43,715 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-28 01:01:43,716 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-28 01:01:43,716 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-28 01:01:43,748 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-28 01:01:43,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 55 places, 46 transitions, 104 flow [2024-06-28 01:01:43,807 INFO L124 PetriNetUnfolderBase]: 1/43 cut-off events. [2024-06-28 01:01:43,808 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 01:01:43,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53 conditions, 43 events. 1/43 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 72 event pairs, 0 based on Foata normal form. 0/38 useless extension candidates. Maximal degree in co-relation 44. Up to 2 conditions per place. [2024-06-28 01:01:43,812 INFO L82 GeneralOperation]: Start removeDead. Operand has 55 places, 46 transitions, 104 flow [2024-06-28 01:01:43,816 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 50 places, 40 transitions, 89 flow [2024-06-28 01:01:43,828 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-28 01:01:43,832 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;@2a3fb784, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-28 01:01:43,832 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-06-28 01:01:43,834 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-28 01:01:43,835 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-28 01:01:43,835 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 01:01:43,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:01:43,835 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-28 01:01:43,836 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:01:43,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:01:43,841 INFO L85 PathProgramCache]: Analyzing trace with hash 210328679, now seen corresponding path program 1 times [2024-06-28 01:01:43,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:01:43,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469247047] [2024-06-28 01:01:43,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:01:43,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:01:43,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:01:44,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:01:44,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:01:44,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469247047] [2024-06-28 01:01:44,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469247047] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:01:44,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:01:44,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-28 01:01:44,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378789989] [2024-06-28 01:01:44,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:01:44,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-28 01:01:44,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:01:44,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-28 01:01:44,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-28 01:01:44,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 46 [2024-06-28 01:01:44,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 40 transitions, 89 flow. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:44,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:01:44,237 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 46 [2024-06-28 01:01:44,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:01:44,451 INFO L124 PetriNetUnfolderBase]: 1206/1941 cut-off events. [2024-06-28 01:01:44,451 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2024-06-28 01:01:44,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3796 conditions, 1941 events. 1206/1941 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 11029 event pairs, 687 based on Foata normal form. 1/1871 useless extension candidates. Maximal degree in co-relation 3784. Up to 1790 conditions per place. [2024-06-28 01:01:44,464 INFO L140 encePairwiseOnDemand]: 39/46 looper letters, 33 selfloop transitions, 4 changer transitions 0/52 dead transitions. [2024-06-28 01:01:44,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 52 transitions, 193 flow [2024-06-28 01:01:44,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-28 01:01:44,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-28 01:01:44,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 97 transitions. [2024-06-28 01:01:44,490 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7028985507246377 [2024-06-28 01:01:44,492 INFO L175 Difference]: Start difference. First operand has 50 places, 40 transitions, 89 flow. Second operand 3 states and 97 transitions. [2024-06-28 01:01:44,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 52 transitions, 193 flow [2024-06-28 01:01:44,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 52 transitions, 188 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-28 01:01:44,498 INFO L231 Difference]: Finished difference. Result has 50 places, 43 transitions, 116 flow [2024-06-28 01:01:44,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=116, PETRI_PLACES=50, PETRI_TRANSITIONS=43} [2024-06-28 01:01:44,503 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 0 predicate places. [2024-06-28 01:01:44,504 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 43 transitions, 116 flow [2024-06-28 01:01:44,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:44,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:01:44,504 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:01:44,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-28 01:01:44,505 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:01:44,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:01:44,506 INFO L85 PathProgramCache]: Analyzing trace with hash 263360036, now seen corresponding path program 1 times [2024-06-28 01:01:44,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:01:44,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860782936] [2024-06-28 01:01:44,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:01:44,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:01:44,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:01:44,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:01:44,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:01:44,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860782936] [2024-06-28 01:01:44,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860782936] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:01:44,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:01:44,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-28 01:01:44,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625577516] [2024-06-28 01:01:44,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:01:44,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-28 01:01:44,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:01:44,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-28 01:01:44,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-28 01:01:44,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 46 [2024-06-28 01:01:44,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 116 flow. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:44,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:01:44,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 46 [2024-06-28 01:01:44,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:01:44,858 INFO L124 PetriNetUnfolderBase]: 1200/1936 cut-off events. [2024-06-28 01:01:44,858 INFO L125 PetriNetUnfolderBase]: For 352/352 co-relation queries the response was YES. [2024-06-28 01:01:44,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4277 conditions, 1936 events. 1200/1936 cut-off events. For 352/352 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 10949 event pairs, 627 based on Foata normal form. 3/1903 useless extension candidates. Maximal degree in co-relation 4265. Up to 1762 conditions per place. [2024-06-28 01:01:44,868 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 42 selfloop transitions, 7 changer transitions 0/64 dead transitions. [2024-06-28 01:01:44,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 64 transitions, 268 flow [2024-06-28 01:01:44,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 01:01:44,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 01:01:44,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 128 transitions. [2024-06-28 01:01:44,871 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6956521739130435 [2024-06-28 01:01:44,871 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 116 flow. Second operand 4 states and 128 transitions. [2024-06-28 01:01:44,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 64 transitions, 268 flow [2024-06-28 01:01:44,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 64 transitions, 264 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-28 01:01:44,874 INFO L231 Difference]: Finished difference. Result has 53 places, 46 transitions, 152 flow [2024-06-28 01:01:44,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=152, PETRI_PLACES=53, PETRI_TRANSITIONS=46} [2024-06-28 01:01:44,875 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 3 predicate places. [2024-06-28 01:01:44,876 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 46 transitions, 152 flow [2024-06-28 01:01:44,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:44,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:01:44,878 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:01:44,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-28 01:01:44,878 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:01:44,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:01:44,884 INFO L85 PathProgramCache]: Analyzing trace with hash 479053769, now seen corresponding path program 1 times [2024-06-28 01:01:44,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:01:44,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930472600] [2024-06-28 01:01:44,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:01:44,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:01:44,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:01:45,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:01:45,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:01:45,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930472600] [2024-06-28 01:01:45,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930472600] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:01:45,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:01:45,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-28 01:01:45,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132930738] [2024-06-28 01:01:45,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:01:45,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-28 01:01:45,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:01:45,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-28 01:01:45,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-28 01:01:45,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 01:01:45,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 46 transitions, 152 flow. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:45,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:01:45,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 01:01:45,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:01:45,208 INFO L124 PetriNetUnfolderBase]: 1529/2415 cut-off events. [2024-06-28 01:01:45,208 INFO L125 PetriNetUnfolderBase]: For 1055/1055 co-relation queries the response was YES. [2024-06-28 01:01:45,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5888 conditions, 2415 events. 1529/2415 cut-off events. For 1055/1055 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 13533 event pairs, 781 based on Foata normal form. 2/2389 useless extension candidates. Maximal degree in co-relation 5874. Up to 2241 conditions per place. [2024-06-28 01:01:45,219 INFO L140 encePairwiseOnDemand]: 39/46 looper letters, 43 selfloop transitions, 7 changer transitions 0/64 dead transitions. [2024-06-28 01:01:45,220 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 64 transitions, 300 flow [2024-06-28 01:01:45,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 01:01:45,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 01:01:45,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 121 transitions. [2024-06-28 01:01:45,223 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.657608695652174 [2024-06-28 01:01:45,223 INFO L175 Difference]: Start difference. First operand has 53 places, 46 transitions, 152 flow. Second operand 4 states and 121 transitions. [2024-06-28 01:01:45,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 64 transitions, 300 flow [2024-06-28 01:01:45,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 64 transitions, 286 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-28 01:01:45,226 INFO L231 Difference]: Finished difference. Result has 55 places, 49 transitions, 178 flow [2024-06-28 01:01:45,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=178, PETRI_PLACES=55, PETRI_TRANSITIONS=49} [2024-06-28 01:01:45,227 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 5 predicate places. [2024-06-28 01:01:45,227 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 49 transitions, 178 flow [2024-06-28 01:01:45,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:45,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:01:45,229 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:01:45,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-28 01:01:45,229 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:01:45,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:01:45,230 INFO L85 PathProgramCache]: Analyzing trace with hash 672983172, now seen corresponding path program 1 times [2024-06-28 01:01:45,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:01:45,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966898707] [2024-06-28 01:01:45,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:01:45,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:01:45,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:01:45,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:01:45,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:01:45,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966898707] [2024-06-28 01:01:45,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966898707] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:01:45,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:01:45,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 01:01:45,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866506528] [2024-06-28 01:01:45,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:01:45,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 01:01:45,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:01:45,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 01:01:45,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 01:01:45,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 01:01:45,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 49 transitions, 178 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:45,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:01:45,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 01:01:45,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:01:45,663 INFO L124 PetriNetUnfolderBase]: 1520/2432 cut-off events. [2024-06-28 01:01:45,664 INFO L125 PetriNetUnfolderBase]: For 1854/1854 co-relation queries the response was YES. [2024-06-28 01:01:45,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6363 conditions, 2432 events. 1520/2432 cut-off events. For 1854/1854 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 13759 event pairs, 446 based on Foata normal form. 6/2407 useless extension candidates. Maximal degree in co-relation 6348. Up to 2163 conditions per place. [2024-06-28 01:01:45,678 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 61 selfloop transitions, 12 changer transitions 0/87 dead transitions. [2024-06-28 01:01:45,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 87 transitions, 424 flow [2024-06-28 01:01:45,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 01:01:45,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 01:01:45,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 181 transitions. [2024-06-28 01:01:45,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6557971014492754 [2024-06-28 01:01:45,680 INFO L175 Difference]: Start difference. First operand has 55 places, 49 transitions, 178 flow. Second operand 6 states and 181 transitions. [2024-06-28 01:01:45,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 87 transitions, 424 flow [2024-06-28 01:01:45,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 87 transitions, 408 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-28 01:01:45,684 INFO L231 Difference]: Finished difference. Result has 59 places, 53 transitions, 221 flow [2024-06-28 01:01:45,684 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=221, PETRI_PLACES=59, PETRI_TRANSITIONS=53} [2024-06-28 01:01:45,686 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 9 predicate places. [2024-06-28 01:01:45,686 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 53 transitions, 221 flow [2024-06-28 01:01:45,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:45,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:01:45,686 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:01:45,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-28 01:01:45,686 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:01:45,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:01:45,687 INFO L85 PathProgramCache]: Analyzing trace with hash 1939848214, now seen corresponding path program 1 times [2024-06-28 01:01:45,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:01:45,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030209973] [2024-06-28 01:01:45,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:01:45,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:01:45,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:01:45,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:01:45,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:01:45,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030209973] [2024-06-28 01:01:45,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030209973] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:01:45,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:01:45,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 01:01:45,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274406222] [2024-06-28 01:01:45,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:01:45,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 01:01:45,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:01:45,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 01:01:45,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-28 01:01:45,810 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 01:01:45,810 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 53 transitions, 221 flow. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:45,810 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:01:45,810 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 01:01:45,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:01:46,002 INFO L124 PetriNetUnfolderBase]: 1528/2525 cut-off events. [2024-06-28 01:01:46,002 INFO L125 PetriNetUnfolderBase]: For 3108/3108 co-relation queries the response was YES. [2024-06-28 01:01:46,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7013 conditions, 2525 events. 1528/2525 cut-off events. For 3108/3108 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 14553 event pairs, 732 based on Foata normal form. 3/2508 useless extension candidates. Maximal degree in co-relation 6996. Up to 2187 conditions per place. [2024-06-28 01:01:46,014 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 57 selfloop transitions, 16 changer transitions 0/87 dead transitions. [2024-06-28 01:01:46,015 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 87 transitions, 487 flow [2024-06-28 01:01:46,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 01:01:46,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 01:01:46,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 153 transitions. [2024-06-28 01:01:46,016 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6652173913043479 [2024-06-28 01:01:46,016 INFO L175 Difference]: Start difference. First operand has 59 places, 53 transitions, 221 flow. Second operand 5 states and 153 transitions. [2024-06-28 01:01:46,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 87 transitions, 487 flow [2024-06-28 01:01:46,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 87 transitions, 458 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-28 01:01:46,019 INFO L231 Difference]: Finished difference. Result has 63 places, 64 transitions, 311 flow [2024-06-28 01:01:46,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=311, PETRI_PLACES=63, PETRI_TRANSITIONS=64} [2024-06-28 01:01:46,020 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 13 predicate places. [2024-06-28 01:01:46,020 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 64 transitions, 311 flow [2024-06-28 01:01:46,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:46,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:01:46,020 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:01:46,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-28 01:01:46,021 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:01:46,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:01:46,021 INFO L85 PathProgramCache]: Analyzing trace with hash -1457380792, now seen corresponding path program 1 times [2024-06-28 01:01:46,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:01:46,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121438192] [2024-06-28 01:01:46,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:01:46,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:01:46,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:01:46,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:01:46,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:01:46,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121438192] [2024-06-28 01:01:46,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121438192] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:01:46,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:01:46,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 01:01:46,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006199698] [2024-06-28 01:01:46,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:01:46,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 01:01:46,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:01:46,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 01:01:46,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-28 01:01:46,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 01:01:46,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 64 transitions, 311 flow. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:46,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:01:46,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 01:01:46,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:01:46,384 INFO L124 PetriNetUnfolderBase]: 1545/2492 cut-off events. [2024-06-28 01:01:46,384 INFO L125 PetriNetUnfolderBase]: For 4917/4923 co-relation queries the response was YES. [2024-06-28 01:01:46,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7947 conditions, 2492 events. 1545/2492 cut-off events. For 4917/4923 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 14090 event pairs, 498 based on Foata normal form. 6/2493 useless extension candidates. Maximal degree in co-relation 7927. Up to 2214 conditions per place. [2024-06-28 01:01:46,399 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 67 selfloop transitions, 15 changer transitions 0/96 dead transitions. [2024-06-28 01:01:46,399 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 96 transitions, 601 flow [2024-06-28 01:01:46,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 01:01:46,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 01:01:46,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 154 transitions. [2024-06-28 01:01:46,400 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6695652173913044 [2024-06-28 01:01:46,400 INFO L175 Difference]: Start difference. First operand has 63 places, 64 transitions, 311 flow. Second operand 5 states and 154 transitions. [2024-06-28 01:01:46,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 96 transitions, 601 flow [2024-06-28 01:01:46,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 96 transitions, 589 flow, removed 6 selfloop flow, removed 0 redundant places. [2024-06-28 01:01:46,408 INFO L231 Difference]: Finished difference. Result has 68 places, 70 transitions, 387 flow [2024-06-28 01:01:46,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=299, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=387, PETRI_PLACES=68, PETRI_TRANSITIONS=70} [2024-06-28 01:01:46,410 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 18 predicate places. [2024-06-28 01:01:46,410 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 70 transitions, 387 flow [2024-06-28 01:01:46,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:46,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:01:46,410 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:01:46,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-28 01:01:46,411 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:01:46,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:01:46,411 INFO L85 PathProgramCache]: Analyzing trace with hash 836654456, now seen corresponding path program 2 times [2024-06-28 01:01:46,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:01:46,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354991941] [2024-06-28 01:01:46,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:01:46,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:01:46,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:01:46,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:01:46,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:01:46,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354991941] [2024-06-28 01:01:46,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354991941] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:01:46,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:01:46,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 01:01:46,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040016085] [2024-06-28 01:01:46,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:01:46,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 01:01:46,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:01:46,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 01:01:46,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-28 01:01:46,536 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 01:01:46,536 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 70 transitions, 387 flow. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:46,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:01:46,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 01:01:46,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:01:46,753 INFO L124 PetriNetUnfolderBase]: 1540/2477 cut-off events. [2024-06-28 01:01:46,753 INFO L125 PetriNetUnfolderBase]: For 6425/6425 co-relation queries the response was YES. [2024-06-28 01:01:46,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8442 conditions, 2477 events. 1540/2477 cut-off events. For 6425/6425 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 13989 event pairs, 501 based on Foata normal form. 2/2473 useless extension candidates. Maximal degree in co-relation 8419. Up to 2209 conditions per place. [2024-06-28 01:01:46,772 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 62 selfloop transitions, 15 changer transitions 0/91 dead transitions. [2024-06-28 01:01:46,773 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 91 transitions, 591 flow [2024-06-28 01:01:46,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 01:01:46,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 01:01:46,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 149 transitions. [2024-06-28 01:01:46,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6478260869565218 [2024-06-28 01:01:46,774 INFO L175 Difference]: Start difference. First operand has 68 places, 70 transitions, 387 flow. Second operand 5 states and 149 transitions. [2024-06-28 01:01:46,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 91 transitions, 591 flow [2024-06-28 01:01:46,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 91 transitions, 555 flow, removed 15 selfloop flow, removed 1 redundant places. [2024-06-28 01:01:46,782 INFO L231 Difference]: Finished difference. Result has 72 places, 70 transitions, 389 flow [2024-06-28 01:01:46,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=351, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=389, PETRI_PLACES=72, PETRI_TRANSITIONS=70} [2024-06-28 01:01:46,784 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 22 predicate places. [2024-06-28 01:01:46,784 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 70 transitions, 389 flow [2024-06-28 01:01:46,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:46,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:01:46,785 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:01:46,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-28 01:01:46,785 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:01:46,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:01:46,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1199000425, now seen corresponding path program 1 times [2024-06-28 01:01:46,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:01:46,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445653370] [2024-06-28 01:01:46,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:01:46,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:01:46,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:01:46,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:01:46,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:01:46,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445653370] [2024-06-28 01:01:46,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445653370] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:01:46,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:01:46,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 01:01:46,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716040557] [2024-06-28 01:01:46,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:01:46,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 01:01:46,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:01:46,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 01:01:46,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 01:01:46,909 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 01:01:46,910 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 70 transitions, 389 flow. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:46,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:01:46,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 01:01:46,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:01:47,183 INFO L124 PetriNetUnfolderBase]: 1667/2699 cut-off events. [2024-06-28 01:01:47,183 INFO L125 PetriNetUnfolderBase]: For 7383/7383 co-relation queries the response was YES. [2024-06-28 01:01:47,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9102 conditions, 2699 events. 1667/2699 cut-off events. For 7383/7383 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 15456 event pairs, 497 based on Foata normal form. 4/2687 useless extension candidates. Maximal degree in co-relation 9077. Up to 2076 conditions per place. [2024-06-28 01:01:47,198 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 81 selfloop transitions, 32 changer transitions 0/127 dead transitions. [2024-06-28 01:01:47,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 127 transitions, 883 flow [2024-06-28 01:01:47,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 01:01:47,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 01:01:47,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 195 transitions. [2024-06-28 01:01:47,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7065217391304348 [2024-06-28 01:01:47,199 INFO L175 Difference]: Start difference. First operand has 72 places, 70 transitions, 389 flow. Second operand 6 states and 195 transitions. [2024-06-28 01:01:47,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 127 transitions, 883 flow [2024-06-28 01:01:47,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 127 transitions, 841 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-28 01:01:47,208 INFO L231 Difference]: Finished difference. Result has 76 places, 89 transitions, 569 flow [2024-06-28 01:01:47,208 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=347, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=569, PETRI_PLACES=76, PETRI_TRANSITIONS=89} [2024-06-28 01:01:47,209 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 26 predicate places. [2024-06-28 01:01:47,209 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 89 transitions, 569 flow [2024-06-28 01:01:47,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:47,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:01:47,209 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:01:47,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-28 01:01:47,209 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:01:47,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:01:47,210 INFO L85 PathProgramCache]: Analyzing trace with hash 146831173, now seen corresponding path program 2 times [2024-06-28 01:01:47,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:01:47,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087832547] [2024-06-28 01:01:47,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:01:47,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:01:47,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:01:47,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:01:47,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:01:47,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087832547] [2024-06-28 01:01:47,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087832547] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:01:47,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:01:47,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 01:01:47,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495363043] [2024-06-28 01:01:47,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:01:47,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 01:01:47,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:01:47,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 01:01:47,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 01:01:47,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 01:01:47,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 89 transitions, 569 flow. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:47,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:01:47,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 01:01:47,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:01:47,615 INFO L124 PetriNetUnfolderBase]: 1766/2911 cut-off events. [2024-06-28 01:01:47,615 INFO L125 PetriNetUnfolderBase]: For 11307/11307 co-relation queries the response was YES. [2024-06-28 01:01:47,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11324 conditions, 2911 events. 1766/2911 cut-off events. For 11307/11307 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 17222 event pairs, 532 based on Foata normal form. 4/2904 useless extension candidates. Maximal degree in co-relation 11296. Up to 2165 conditions per place. [2024-06-28 01:01:47,633 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 79 selfloop transitions, 49 changer transitions 0/142 dead transitions. [2024-06-28 01:01:47,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 142 transitions, 1144 flow [2024-06-28 01:01:47,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 01:01:47,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 01:01:47,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 190 transitions. [2024-06-28 01:01:47,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6884057971014492 [2024-06-28 01:01:47,634 INFO L175 Difference]: Start difference. First operand has 76 places, 89 transitions, 569 flow. Second operand 6 states and 190 transitions. [2024-06-28 01:01:47,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 142 transitions, 1144 flow [2024-06-28 01:01:47,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 142 transitions, 1104 flow, removed 20 selfloop flow, removed 0 redundant places. [2024-06-28 01:01:47,650 INFO L231 Difference]: Finished difference. Result has 85 places, 108 transitions, 867 flow [2024-06-28 01:01:47,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=539, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=867, PETRI_PLACES=85, PETRI_TRANSITIONS=108} [2024-06-28 01:01:47,651 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 35 predicate places. [2024-06-28 01:01:47,651 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 108 transitions, 867 flow [2024-06-28 01:01:47,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:47,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:01:47,651 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:01:47,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-28 01:01:47,652 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:01:47,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:01:47,652 INFO L85 PathProgramCache]: Analyzing trace with hash 178097239, now seen corresponding path program 3 times [2024-06-28 01:01:47,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:01:47,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454374409] [2024-06-28 01:01:47,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:01:47,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:01:47,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:01:47,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:01:47,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:01:47,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454374409] [2024-06-28 01:01:47,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454374409] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:01:47,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:01:47,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 01:01:47,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848254985] [2024-06-28 01:01:47,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:01:47,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 01:01:47,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:01:47,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 01:01:47,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 01:01:47,765 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 01:01:47,766 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 108 transitions, 867 flow. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:47,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:01:47,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 01:01:47,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:01:48,008 INFO L124 PetriNetUnfolderBase]: 1759/2837 cut-off events. [2024-06-28 01:01:48,008 INFO L125 PetriNetUnfolderBase]: For 14515/14515 co-relation queries the response was YES. [2024-06-28 01:01:48,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12373 conditions, 2837 events. 1759/2837 cut-off events. For 14515/14515 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 16441 event pairs, 484 based on Foata normal form. 4/2833 useless extension candidates. Maximal degree in co-relation 12339. Up to 2161 conditions per place. [2024-06-28 01:01:48,054 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 81 selfloop transitions, 47 changer transitions 0/142 dead transitions. [2024-06-28 01:01:48,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 142 transitions, 1291 flow [2024-06-28 01:01:48,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 01:01:48,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 01:01:48,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 189 transitions. [2024-06-28 01:01:48,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6847826086956522 [2024-06-28 01:01:48,056 INFO L175 Difference]: Start difference. First operand has 85 places, 108 transitions, 867 flow. Second operand 6 states and 189 transitions. [2024-06-28 01:01:48,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 142 transitions, 1291 flow [2024-06-28 01:01:48,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 142 transitions, 1263 flow, removed 14 selfloop flow, removed 0 redundant places. [2024-06-28 01:01:48,076 INFO L231 Difference]: Finished difference. Result has 93 places, 112 transitions, 1039 flow [2024-06-28 01:01:48,076 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=839, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1039, PETRI_PLACES=93, PETRI_TRANSITIONS=112} [2024-06-28 01:01:48,077 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 43 predicate places. [2024-06-28 01:01:48,077 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 112 transitions, 1039 flow [2024-06-28 01:01:48,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:48,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:01:48,077 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:01:48,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-28 01:01:48,078 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:01:48,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:01:48,078 INFO L85 PathProgramCache]: Analyzing trace with hash 178374069, now seen corresponding path program 1 times [2024-06-28 01:01:48,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:01:48,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202829736] [2024-06-28 01:01:48,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:01:48,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:01:48,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:01:48,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:01:48,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:01:48,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202829736] [2024-06-28 01:01:48,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202829736] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:01:48,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:01:48,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 01:01:48,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994813758] [2024-06-28 01:01:48,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:01:48,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 01:01:48,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:01:48,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 01:01:48,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 01:01:48,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 01:01:48,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 112 transitions, 1039 flow. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:48,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:01:48,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 01:01:48,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:01:48,620 INFO L124 PetriNetUnfolderBase]: 1772/2906 cut-off events. [2024-06-28 01:01:48,620 INFO L125 PetriNetUnfolderBase]: For 16530/16530 co-relation queries the response was YES. [2024-06-28 01:01:48,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13054 conditions, 2906 events. 1772/2906 cut-off events. For 16530/16530 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 17081 event pairs, 468 based on Foata normal form. 6/2910 useless extension candidates. Maximal degree in co-relation 13015. Up to 2482 conditions per place. [2024-06-28 01:01:48,648 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 112 selfloop transitions, 19 changer transitions 0/145 dead transitions. [2024-06-28 01:01:48,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 145 transitions, 1445 flow [2024-06-28 01:01:48,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 01:01:48,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 01:01:48,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 181 transitions. [2024-06-28 01:01:48,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6557971014492754 [2024-06-28 01:01:48,650 INFO L175 Difference]: Start difference. First operand has 93 places, 112 transitions, 1039 flow. Second operand 6 states and 181 transitions. [2024-06-28 01:01:48,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 145 transitions, 1445 flow [2024-06-28 01:01:48,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 145 transitions, 1385 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-28 01:01:48,686 INFO L231 Difference]: Finished difference. Result has 97 places, 115 transitions, 1065 flow [2024-06-28 01:01:48,686 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=979, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1065, PETRI_PLACES=97, PETRI_TRANSITIONS=115} [2024-06-28 01:01:48,687 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 47 predicate places. [2024-06-28 01:01:48,687 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 115 transitions, 1065 flow [2024-06-28 01:01:48,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:48,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:01:48,687 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:01:48,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-28 01:01:48,688 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:01:48,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:01:48,689 INFO L85 PathProgramCache]: Analyzing trace with hash -894635023, now seen corresponding path program 1 times [2024-06-28 01:01:48,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:01:48,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704965556] [2024-06-28 01:01:48,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:01:48,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:01:48,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:01:48,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:01:48,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:01:48,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704965556] [2024-06-28 01:01:48,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704965556] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:01:48,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:01:48,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-28 01:01:48,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302768549] [2024-06-28 01:01:48,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:01:48,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-28 01:01:48,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:01:48,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-28 01:01:48,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-28 01:01:48,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 46 [2024-06-28 01:01:48,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 115 transitions, 1065 flow. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 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) [2024-06-28 01:01:48,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:01:48,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 46 [2024-06-28 01:01:48,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:01:49,141 INFO L124 PetriNetUnfolderBase]: 1715/2870 cut-off events. [2024-06-28 01:01:49,141 INFO L125 PetriNetUnfolderBase]: For 17689/17689 co-relation queries the response was YES. [2024-06-28 01:01:49,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12810 conditions, 2870 events. 1715/2870 cut-off events. For 17689/17689 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 17154 event pairs, 748 based on Foata normal form. 1/2847 useless extension candidates. Maximal degree in co-relation 12770. Up to 2339 conditions per place. [2024-06-28 01:01:49,172 INFO L140 encePairwiseOnDemand]: 40/46 looper letters, 93 selfloop transitions, 7 changer transitions 0/127 dead transitions. [2024-06-28 01:01:49,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 127 transitions, 1293 flow [2024-06-28 01:01:49,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 01:01:49,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 01:01:49,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 119 transitions. [2024-06-28 01:01:49,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6467391304347826 [2024-06-28 01:01:49,173 INFO L175 Difference]: Start difference. First operand has 97 places, 115 transitions, 1065 flow. Second operand 4 states and 119 transitions. [2024-06-28 01:01:49,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 127 transitions, 1293 flow [2024-06-28 01:01:49,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 127 transitions, 1225 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-28 01:01:49,209 INFO L231 Difference]: Finished difference. Result has 97 places, 115 transitions, 1017 flow [2024-06-28 01:01:49,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=997, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1017, PETRI_PLACES=97, PETRI_TRANSITIONS=115} [2024-06-28 01:01:49,211 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 47 predicate places. [2024-06-28 01:01:49,211 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 115 transitions, 1017 flow [2024-06-28 01:01:49,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 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) [2024-06-28 01:01:49,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:01:49,212 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:01:49,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-28 01:01:49,212 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:01:49,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:01:49,212 INFO L85 PathProgramCache]: Analyzing trace with hash -885425341, now seen corresponding path program 1 times [2024-06-28 01:01:49,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:01:49,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190764556] [2024-06-28 01:01:49,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:01:49,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:01:49,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:01:49,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:01:49,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:01:49,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190764556] [2024-06-28 01:01:49,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190764556] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:01:49,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:01:49,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 01:01:49,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113762913] [2024-06-28 01:01:49,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:01:49,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 01:01:49,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:01:49,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 01:01:49,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-28 01:01:49,346 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 01:01:49,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 115 transitions, 1017 flow. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:49,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:01:49,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 01:01:49,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:01:49,743 INFO L124 PetriNetUnfolderBase]: 1786/3066 cut-off events. [2024-06-28 01:01:49,744 INFO L125 PetriNetUnfolderBase]: For 18959/18959 co-relation queries the response was YES. [2024-06-28 01:01:49,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13307 conditions, 3066 events. 1786/3066 cut-off events. For 18959/18959 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 18465 event pairs, 581 based on Foata normal form. 2/3065 useless extension candidates. Maximal degree in co-relation 13266. Up to 2556 conditions per place. [2024-06-28 01:01:49,773 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 124 selfloop transitions, 13 changer transitions 0/151 dead transitions. [2024-06-28 01:01:49,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 151 transitions, 1403 flow [2024-06-28 01:01:49,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 01:01:49,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 01:01:49,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 180 transitions. [2024-06-28 01:01:49,775 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6521739130434783 [2024-06-28 01:01:49,776 INFO L175 Difference]: Start difference. First operand has 97 places, 115 transitions, 1017 flow. Second operand 6 states and 180 transitions. [2024-06-28 01:01:49,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 151 transitions, 1403 flow [2024-06-28 01:01:49,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 151 transitions, 1383 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-28 01:01:49,813 INFO L231 Difference]: Finished difference. Result has 100 places, 118 transitions, 1069 flow [2024-06-28 01:01:49,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=997, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1069, PETRI_PLACES=100, PETRI_TRANSITIONS=118} [2024-06-28 01:01:49,813 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 50 predicate places. [2024-06-28 01:01:49,814 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 118 transitions, 1069 flow [2024-06-28 01:01:49,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:49,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:01:49,814 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:01:49,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-28 01:01:49,814 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:01:49,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:01:49,815 INFO L85 PathProgramCache]: Analyzing trace with hash -885247711, now seen corresponding path program 2 times [2024-06-28 01:01:49,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:01:49,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047325254] [2024-06-28 01:01:49,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:01:49,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:01:49,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:01:49,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:01:49,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:01:49,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047325254] [2024-06-28 01:01:49,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047325254] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:01:49,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:01:49,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 01:01:49,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128909631] [2024-06-28 01:01:49,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:01:49,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 01:01:49,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:01:49,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 01:01:49,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 01:01:49,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 01:01:49,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 118 transitions, 1069 flow. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:49,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:01:49,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 01:01:49,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:01:50,273 INFO L124 PetriNetUnfolderBase]: 1803/2935 cut-off events. [2024-06-28 01:01:50,273 INFO L125 PetriNetUnfolderBase]: For 21509/21512 co-relation queries the response was YES. [2024-06-28 01:01:50,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13794 conditions, 2935 events. 1803/2935 cut-off events. For 21509/21512 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 17273 event pairs, 455 based on Foata normal form. 4/2935 useless extension candidates. Maximal degree in co-relation 13753. Up to 2513 conditions per place. [2024-06-28 01:01:50,300 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 117 selfloop transitions, 25 changer transitions 0/156 dead transitions. [2024-06-28 01:01:50,300 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 156 transitions, 1555 flow [2024-06-28 01:01:50,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 01:01:50,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 01:01:50,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 183 transitions. [2024-06-28 01:01:50,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6630434782608695 [2024-06-28 01:01:50,302 INFO L175 Difference]: Start difference. First operand has 100 places, 118 transitions, 1069 flow. Second operand 6 states and 183 transitions. [2024-06-28 01:01:50,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 156 transitions, 1555 flow [2024-06-28 01:01:50,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 156 transitions, 1507 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-28 01:01:50,348 INFO L231 Difference]: Finished difference. Result has 102 places, 124 transitions, 1161 flow [2024-06-28 01:01:50,348 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1021, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1161, PETRI_PLACES=102, PETRI_TRANSITIONS=124} [2024-06-28 01:01:50,349 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 52 predicate places. [2024-06-28 01:01:50,349 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 124 transitions, 1161 flow [2024-06-28 01:01:50,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:50,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:01:50,349 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:01:50,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-28 01:01:50,350 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:01:50,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:01:50,350 INFO L85 PathProgramCache]: Analyzing trace with hash 256562947, now seen corresponding path program 3 times [2024-06-28 01:01:50,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:01:50,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568161464] [2024-06-28 01:01:50,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:01:50,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:01:50,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:01:50,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:01:50,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:01:50,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568161464] [2024-06-28 01:01:50,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568161464] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:01:50,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:01:50,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 01:01:50,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018662703] [2024-06-28 01:01:50,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:01:50,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 01:01:50,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:01:50,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 01:01:50,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 01:01:50,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 01:01:50,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 124 transitions, 1161 flow. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:50,480 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:01:50,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 01:01:50,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:01:50,848 INFO L124 PetriNetUnfolderBase]: 1798/2944 cut-off events. [2024-06-28 01:01:50,848 INFO L125 PetriNetUnfolderBase]: For 24539/24539 co-relation queries the response was YES. [2024-06-28 01:01:50,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14200 conditions, 2944 events. 1798/2944 cut-off events. For 24539/24539 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 17458 event pairs, 589 based on Foata normal form. 2/2930 useless extension candidates. Maximal degree in co-relation 14158. Up to 2508 conditions per place. [2024-06-28 01:01:50,873 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 112 selfloop transitions, 25 changer transitions 0/151 dead transitions. [2024-06-28 01:01:50,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 151 transitions, 1499 flow [2024-06-28 01:01:50,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 01:01:50,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 01:01:50,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 178 transitions. [2024-06-28 01:01:50,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.644927536231884 [2024-06-28 01:01:50,874 INFO L175 Difference]: Start difference. First operand has 102 places, 124 transitions, 1161 flow. Second operand 6 states and 178 transitions. [2024-06-28 01:01:50,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 151 transitions, 1499 flow [2024-06-28 01:01:50,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 151 transitions, 1433 flow, removed 26 selfloop flow, removed 2 redundant places. [2024-06-28 01:01:50,905 INFO L231 Difference]: Finished difference. Result has 106 places, 124 transitions, 1153 flow [2024-06-28 01:01:50,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1095, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1153, PETRI_PLACES=106, PETRI_TRANSITIONS=124} [2024-06-28 01:01:50,906 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 56 predicate places. [2024-06-28 01:01:50,906 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 124 transitions, 1153 flow [2024-06-28 01:01:50,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:50,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:01:50,907 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:01:50,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-28 01:01:50,907 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:01:50,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:01:50,907 INFO L85 PathProgramCache]: Analyzing trace with hash -1986973598, now seen corresponding path program 1 times [2024-06-28 01:01:50,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:01:50,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293139133] [2024-06-28 01:01:50,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:01:50,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:01:50,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:01:50,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:01:50,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:01:50,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293139133] [2024-06-28 01:01:50,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293139133] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:01:50,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:01:50,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 01:01:50,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147393326] [2024-06-28 01:01:50,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:01:50,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 01:01:50,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:01:50,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 01:01:50,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-28 01:01:51,011 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 46 [2024-06-28 01:01:51,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 124 transitions, 1153 flow. Second operand has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:51,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:01:51,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 46 [2024-06-28 01:01:51,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:01:51,272 INFO L124 PetriNetUnfolderBase]: 1737/2871 cut-off events. [2024-06-28 01:01:51,272 INFO L125 PetriNetUnfolderBase]: For 25442/25456 co-relation queries the response was YES. [2024-06-28 01:01:51,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13820 conditions, 2871 events. 1737/2871 cut-off events. For 25442/25456 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 17229 event pairs, 701 based on Foata normal form. 7/2855 useless extension candidates. Maximal degree in co-relation 13776. Up to 2307 conditions per place. [2024-06-28 01:01:51,298 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 97 selfloop transitions, 23 changer transitions 0/147 dead transitions. [2024-06-28 01:01:51,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 147 transitions, 1515 flow [2024-06-28 01:01:51,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 01:01:51,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 01:01:51,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 149 transitions. [2024-06-28 01:01:51,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6478260869565218 [2024-06-28 01:01:51,299 INFO L175 Difference]: Start difference. First operand has 106 places, 124 transitions, 1153 flow. Second operand 5 states and 149 transitions. [2024-06-28 01:01:51,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 147 transitions, 1515 flow [2024-06-28 01:01:51,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 147 transitions, 1445 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-28 01:01:51,338 INFO L231 Difference]: Finished difference. Result has 107 places, 131 transitions, 1217 flow [2024-06-28 01:01:51,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1083, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1217, PETRI_PLACES=107, PETRI_TRANSITIONS=131} [2024-06-28 01:01:51,338 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 57 predicate places. [2024-06-28 01:01:51,339 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 131 transitions, 1217 flow [2024-06-28 01:01:51,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:51,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:01:51,339 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:01:51,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-28 01:01:51,339 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:01:51,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:01:51,340 INFO L85 PathProgramCache]: Analyzing trace with hash 2042416114, now seen corresponding path program 1 times [2024-06-28 01:01:51,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:01:51,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382409625] [2024-06-28 01:01:51,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:01:51,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:01:51,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:01:51,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:01:51,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:01:51,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382409625] [2024-06-28 01:01:51,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382409625] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:01:51,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:01:51,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 01:01:51,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561412392] [2024-06-28 01:01:51,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:01:51,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 01:01:51,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:01:51,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 01:01:51,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 01:01:51,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 01:01:51,516 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 131 transitions, 1217 flow. Second operand has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:51,516 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:01:51,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 01:01:51,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:01:51,894 INFO L124 PetriNetUnfolderBase]: 1892/3150 cut-off events. [2024-06-28 01:01:51,894 INFO L125 PetriNetUnfolderBase]: For 29453/29453 co-relation queries the response was YES. [2024-06-28 01:01:51,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15613 conditions, 3150 events. 1892/3150 cut-off events. For 29453/29453 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 19109 event pairs, 679 based on Foata normal form. 4/3126 useless extension candidates. Maximal degree in co-relation 15567. Up to 2567 conditions per place. [2024-06-28 01:01:51,921 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 134 selfloop transitions, 35 changer transitions 0/183 dead transitions. [2024-06-28 01:01:51,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 183 transitions, 1851 flow [2024-06-28 01:01:51,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 01:01:51,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 01:01:51,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 223 transitions. [2024-06-28 01:01:51,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6925465838509317 [2024-06-28 01:01:51,923 INFO L175 Difference]: Start difference. First operand has 107 places, 131 transitions, 1217 flow. Second operand 7 states and 223 transitions. [2024-06-28 01:01:51,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 183 transitions, 1851 flow [2024-06-28 01:01:51,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 183 transitions, 1771 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-28 01:01:51,963 INFO L231 Difference]: Finished difference. Result has 112 places, 141 transitions, 1340 flow [2024-06-28 01:01:51,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1137, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1340, PETRI_PLACES=112, PETRI_TRANSITIONS=141} [2024-06-28 01:01:51,963 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 62 predicate places. [2024-06-28 01:01:51,963 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 141 transitions, 1340 flow [2024-06-28 01:01:51,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:51,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:01:51,964 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:01:51,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-28 01:01:51,964 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:01:51,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:01:51,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1672873832, now seen corresponding path program 2 times [2024-06-28 01:01:51,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:01:51,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363176271] [2024-06-28 01:01:51,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:01:51,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:01:51,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:01:52,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:01:52,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:01:52,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363176271] [2024-06-28 01:01:52,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363176271] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:01:52,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:01:52,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 01:01:52,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27558744] [2024-06-28 01:01:52,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:01:52,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 01:01:52,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:01:52,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 01:01:52,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-28 01:01:52,092 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 01:01:52,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 141 transitions, 1340 flow. Second operand has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:52,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:01:52,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 01:01:52,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:01:52,429 INFO L124 PetriNetUnfolderBase]: 2041/3373 cut-off events. [2024-06-28 01:01:52,429 INFO L125 PetriNetUnfolderBase]: For 36174/36174 co-relation queries the response was YES. [2024-06-28 01:01:52,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17596 conditions, 3373 events. 2041/3373 cut-off events. For 36174/36174 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 20579 event pairs, 475 based on Foata normal form. 4/3351 useless extension candidates. Maximal degree in co-relation 17549. Up to 2133 conditions per place. [2024-06-28 01:01:52,452 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 115 selfloop transitions, 75 changer transitions 0/204 dead transitions. [2024-06-28 01:01:52,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 204 transitions, 2282 flow [2024-06-28 01:01:52,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 01:01:52,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 01:01:52,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 230 transitions. [2024-06-28 01:01:52,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7142857142857143 [2024-06-28 01:01:52,453 INFO L175 Difference]: Start difference. First operand has 112 places, 141 transitions, 1340 flow. Second operand 7 states and 230 transitions. [2024-06-28 01:01:52,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 204 transitions, 2282 flow [2024-06-28 01:01:52,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 204 transitions, 2143 flow, removed 43 selfloop flow, removed 3 redundant places. [2024-06-28 01:01:52,507 INFO L231 Difference]: Finished difference. Result has 117 places, 158 transitions, 1573 flow [2024-06-28 01:01:52,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1207, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1573, PETRI_PLACES=117, PETRI_TRANSITIONS=158} [2024-06-28 01:01:52,508 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 67 predicate places. [2024-06-28 01:01:52,508 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 158 transitions, 1573 flow [2024-06-28 01:01:52,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:52,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:01:52,509 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:01:52,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-28 01:01:52,509 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:01:52,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:01:52,509 INFO L85 PathProgramCache]: Analyzing trace with hash -1672666442, now seen corresponding path program 3 times [2024-06-28 01:01:52,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:01:52,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977832011] [2024-06-28 01:01:52,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:01:52,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:01:52,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:01:52,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:01:52,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:01:52,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977832011] [2024-06-28 01:01:52,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977832011] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:01:52,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:01:52,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 01:01:52,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131313426] [2024-06-28 01:01:52,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:01:52,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 01:01:52,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:01:52,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 01:01:52,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-28 01:01:52,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 01:01:52,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 158 transitions, 1573 flow. Second operand has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:52,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:01:52,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 01:01:52,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:01:52,981 INFO L124 PetriNetUnfolderBase]: 2048/3388 cut-off events. [2024-06-28 01:01:52,981 INFO L125 PetriNetUnfolderBase]: For 41127/41127 co-relation queries the response was YES. [2024-06-28 01:01:52,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18597 conditions, 3388 events. 2048/3388 cut-off events. For 41127/41127 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 20666 event pairs, 475 based on Foata normal form. 4/3366 useless extension candidates. Maximal degree in co-relation 18548. Up to 2139 conditions per place. [2024-06-28 01:01:53,004 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 108 selfloop transitions, 84 changer transitions 0/206 dead transitions. [2024-06-28 01:01:53,004 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 206 transitions, 2329 flow [2024-06-28 01:01:53,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 01:01:53,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 01:01:53,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 228 transitions. [2024-06-28 01:01:53,006 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7080745341614907 [2024-06-28 01:01:53,006 INFO L175 Difference]: Start difference. First operand has 117 places, 158 transitions, 1573 flow. Second operand 7 states and 228 transitions. [2024-06-28 01:01:53,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 206 transitions, 2329 flow [2024-06-28 01:01:53,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 206 transitions, 2193 flow, removed 57 selfloop flow, removed 1 redundant places. [2024-06-28 01:01:53,060 INFO L231 Difference]: Finished difference. Result has 123 places, 163 transitions, 1695 flow [2024-06-28 01:01:53,061 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1459, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1695, PETRI_PLACES=123, PETRI_TRANSITIONS=163} [2024-06-28 01:01:53,061 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 73 predicate places. [2024-06-28 01:01:53,061 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 163 transitions, 1695 flow [2024-06-28 01:01:53,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:53,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:01:53,061 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:01:53,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-28 01:01:53,061 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:01:53,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:01:53,062 INFO L85 PathProgramCache]: Analyzing trace with hash 877800660, now seen corresponding path program 1 times [2024-06-28 01:01:53,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:01:53,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603014235] [2024-06-28 01:01:53,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:01:53,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:01:53,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:01:53,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:01:53,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:01:53,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603014235] [2024-06-28 01:01:53,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603014235] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:01:53,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:01:53,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 01:01:53,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885620418] [2024-06-28 01:01:53,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:01:53,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 01:01:53,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:01:53,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 01:01:53,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 01:01:53,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 01:01:53,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 163 transitions, 1695 flow. Second operand has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:53,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:01:53,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 01:01:53,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:01:53,527 INFO L124 PetriNetUnfolderBase]: 2170/3549 cut-off events. [2024-06-28 01:01:53,527 INFO L125 PetriNetUnfolderBase]: For 46412/46412 co-relation queries the response was YES. [2024-06-28 01:01:53,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19453 conditions, 3549 events. 2170/3549 cut-off events. For 46412/46412 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 21681 event pairs, 458 based on Foata normal form. 14/3545 useless extension candidates. Maximal degree in co-relation 19401. Up to 2630 conditions per place. [2024-06-28 01:01:53,551 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 142 selfloop transitions, 53 changer transitions 0/209 dead transitions. [2024-06-28 01:01:53,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 209 transitions, 2357 flow [2024-06-28 01:01:53,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 01:01:53,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 01:01:53,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 225 transitions. [2024-06-28 01:01:53,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6987577639751553 [2024-06-28 01:01:53,553 INFO L175 Difference]: Start difference. First operand has 123 places, 163 transitions, 1695 flow. Second operand 7 states and 225 transitions. [2024-06-28 01:01:53,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 209 transitions, 2357 flow [2024-06-28 01:01:53,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 209 transitions, 2188 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-28 01:01:53,602 INFO L231 Difference]: Finished difference. Result has 126 places, 166 transitions, 1693 flow [2024-06-28 01:01:53,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1526, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1693, PETRI_PLACES=126, PETRI_TRANSITIONS=166} [2024-06-28 01:01:53,603 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 76 predicate places. [2024-06-28 01:01:53,603 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 166 transitions, 1693 flow [2024-06-28 01:01:53,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:53,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:01:53,603 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:01:53,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-28 01:01:53,603 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:01:53,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:01:53,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1479033234, now seen corresponding path program 1 times [2024-06-28 01:01:53,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:01:53,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306304917] [2024-06-28 01:01:53,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:01:53,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:01:53,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:01:53,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:01:53,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:01:53,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306304917] [2024-06-28 01:01:53,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306304917] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:01:53,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:01:53,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 01:01:53,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561085591] [2024-06-28 01:01:53,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:01:53,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 01:01:53,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:01:53,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 01:01:53,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-28 01:01:53,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 46 [2024-06-28 01:01:53,709 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 166 transitions, 1693 flow. Second operand has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:53,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:01:53,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 46 [2024-06-28 01:01:53,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:01:54,030 INFO L124 PetriNetUnfolderBase]: 2062/3437 cut-off events. [2024-06-28 01:01:54,030 INFO L125 PetriNetUnfolderBase]: For 45783/45807 co-relation queries the response was YES. [2024-06-28 01:01:54,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18931 conditions, 3437 events. 2062/3437 cut-off events. For 45783/45807 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 21284 event pairs, 512 based on Foata normal form. 2/3424 useless extension candidates. Maximal degree in co-relation 18878. Up to 2743 conditions per place. [2024-06-28 01:01:54,053 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 137 selfloop transitions, 28 changer transitions 0/193 dead transitions. [2024-06-28 01:01:54,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 193 transitions, 2191 flow [2024-06-28 01:01:54,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 01:01:54,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 01:01:54,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 156 transitions. [2024-06-28 01:01:54,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6782608695652174 [2024-06-28 01:01:54,054 INFO L175 Difference]: Start difference. First operand has 126 places, 166 transitions, 1693 flow. Second operand 5 states and 156 transitions. [2024-06-28 01:01:54,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 193 transitions, 2191 flow [2024-06-28 01:01:54,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 193 transitions, 2052 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-28 01:01:54,116 INFO L231 Difference]: Finished difference. Result has 126 places, 171 transitions, 1695 flow [2024-06-28 01:01:54,116 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1558, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1695, PETRI_PLACES=126, PETRI_TRANSITIONS=171} [2024-06-28 01:01:54,116 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 76 predicate places. [2024-06-28 01:01:54,117 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 171 transitions, 1695 flow [2024-06-28 01:01:54,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:54,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:01:54,117 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:01:54,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-28 01:01:54,117 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:01:54,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:01:54,117 INFO L85 PathProgramCache]: Analyzing trace with hash 1088095172, now seen corresponding path program 4 times [2024-06-28 01:01:54,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:01:54,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085153207] [2024-06-28 01:01:54,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:01:54,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:01:54,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:01:54,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:01:54,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:01:54,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085153207] [2024-06-28 01:01:54,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085153207] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:01:54,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:01:54,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 01:01:54,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753851634] [2024-06-28 01:01:54,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:01:54,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 01:01:54,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:01:54,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 01:01:54,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-28 01:01:54,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 01:01:54,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 171 transitions, 1695 flow. Second operand has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:54,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:01:54,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 01:01:54,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:01:54,605 INFO L124 PetriNetUnfolderBase]: 2277/3719 cut-off events. [2024-06-28 01:01:54,605 INFO L125 PetriNetUnfolderBase]: For 50302/50302 co-relation queries the response was YES. [2024-06-28 01:01:54,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20230 conditions, 3719 events. 2277/3719 cut-off events. For 50302/50302 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 22970 event pairs, 463 based on Foata normal form. 4/3710 useless extension candidates. Maximal degree in co-relation 20176. Up to 2408 conditions per place. [2024-06-28 01:01:54,631 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 113 selfloop transitions, 95 changer transitions 0/222 dead transitions. [2024-06-28 01:01:54,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 222 transitions, 2557 flow [2024-06-28 01:01:54,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 01:01:54,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 01:01:54,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 222 transitions. [2024-06-28 01:01:54,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6894409937888198 [2024-06-28 01:01:54,633 INFO L175 Difference]: Start difference. First operand has 126 places, 171 transitions, 1695 flow. Second operand 7 states and 222 transitions. [2024-06-28 01:01:54,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 222 transitions, 2557 flow [2024-06-28 01:01:54,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 222 transitions, 2503 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-06-28 01:01:54,689 INFO L231 Difference]: Finished difference. Result has 132 places, 184 transitions, 2089 flow [2024-06-28 01:01:54,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1641, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2089, PETRI_PLACES=132, PETRI_TRANSITIONS=184} [2024-06-28 01:01:54,689 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 82 predicate places. [2024-06-28 01:01:54,690 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 184 transitions, 2089 flow [2024-06-28 01:01:54,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:54,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:01:54,690 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:01:54,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-28 01:01:54,690 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:01:54,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:01:54,691 INFO L85 PathProgramCache]: Analyzing trace with hash -525670256, now seen corresponding path program 5 times [2024-06-28 01:01:54,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:01:54,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327758823] [2024-06-28 01:01:54,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:01:54,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:01:54,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:01:54,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:01:54,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:01:54,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327758823] [2024-06-28 01:01:54,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327758823] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:01:54,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:01:54,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 01:01:54,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666962756] [2024-06-28 01:01:54,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:01:54,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 01:01:54,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:01:54,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 01:01:54,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-28 01:01:54,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 01:01:54,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 184 transitions, 2089 flow. Second operand has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:54,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:01:54,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 01:01:54,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:01:55,196 INFO L124 PetriNetUnfolderBase]: 2320/3815 cut-off events. [2024-06-28 01:01:55,196 INFO L125 PetriNetUnfolderBase]: For 58732/58732 co-relation queries the response was YES. [2024-06-28 01:01:55,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22005 conditions, 3815 events. 2320/3815 cut-off events. For 58732/58732 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 23777 event pairs, 528 based on Foata normal form. 4/3796 useless extension candidates. Maximal degree in co-relation 21949. Up to 2447 conditions per place. [2024-06-28 01:01:55,222 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 124 selfloop transitions, 91 changer transitions 0/229 dead transitions. [2024-06-28 01:01:55,222 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 229 transitions, 2937 flow [2024-06-28 01:01:55,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 01:01:55,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 01:01:55,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 224 transitions. [2024-06-28 01:01:55,223 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6956521739130435 [2024-06-28 01:01:55,223 INFO L175 Difference]: Start difference. First operand has 132 places, 184 transitions, 2089 flow. Second operand 7 states and 224 transitions. [2024-06-28 01:01:55,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 229 transitions, 2937 flow [2024-06-28 01:01:55,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 229 transitions, 2815 flow, removed 48 selfloop flow, removed 2 redundant places. [2024-06-28 01:01:55,303 INFO L231 Difference]: Finished difference. Result has 138 places, 191 transitions, 2304 flow [2024-06-28 01:01:55,303 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1977, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2304, PETRI_PLACES=138, PETRI_TRANSITIONS=191} [2024-06-28 01:01:55,304 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 88 predicate places. [2024-06-28 01:01:55,304 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 191 transitions, 2304 flow [2024-06-28 01:01:55,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:55,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:01:55,304 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:01:55,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-28 01:01:55,304 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:01:55,304 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:01:55,304 INFO L85 PathProgramCache]: Analyzing trace with hash -525877646, now seen corresponding path program 6 times [2024-06-28 01:01:55,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:01:55,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437900403] [2024-06-28 01:01:55,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:01:55,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:01:55,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:01:55,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:01:55,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:01:55,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437900403] [2024-06-28 01:01:55,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437900403] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:01:55,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:01:55,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 01:01:55,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274715069] [2024-06-28 01:01:55,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:01:55,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 01:01:55,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:01:55,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 01:01:55,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-28 01:01:55,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 01:01:55,400 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 191 transitions, 2304 flow. Second operand has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:55,400 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:01:55,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 01:01:55,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:01:55,777 INFO L124 PetriNetUnfolderBase]: 2313/3786 cut-off events. [2024-06-28 01:01:55,777 INFO L125 PetriNetUnfolderBase]: For 59794/59794 co-relation queries the response was YES. [2024-06-28 01:01:55,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22429 conditions, 3786 events. 2313/3786 cut-off events. For 59794/59794 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 23423 event pairs, 462 based on Foata normal form. 4/3777 useless extension candidates. Maximal degree in co-relation 22370. Up to 2443 conditions per place. [2024-06-28 01:01:55,805 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 124 selfloop transitions, 90 changer transitions 0/228 dead transitions. [2024-06-28 01:01:55,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 228 transitions, 3002 flow [2024-06-28 01:01:55,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 01:01:55,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 01:01:55,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 222 transitions. [2024-06-28 01:01:55,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6894409937888198 [2024-06-28 01:01:55,807 INFO L175 Difference]: Start difference. First operand has 138 places, 191 transitions, 2304 flow. Second operand 7 states and 222 transitions. [2024-06-28 01:01:55,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 228 transitions, 3002 flow [2024-06-28 01:01:55,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 228 transitions, 2773 flow, removed 50 selfloop flow, removed 3 redundant places. [2024-06-28 01:01:55,904 INFO L231 Difference]: Finished difference. Result has 142 places, 191 transitions, 2266 flow [2024-06-28 01:01:55,904 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2075, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2266, PETRI_PLACES=142, PETRI_TRANSITIONS=191} [2024-06-28 01:01:55,904 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 92 predicate places. [2024-06-28 01:01:55,904 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 191 transitions, 2266 flow [2024-06-28 01:01:55,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:55,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:01:55,905 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:01:55,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-28 01:01:55,905 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:01:55,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:01:55,905 INFO L85 PathProgramCache]: Analyzing trace with hash -390697772, now seen corresponding path program 2 times [2024-06-28 01:01:55,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:01:55,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457550000] [2024-06-28 01:01:55,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:01:55,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:01:55,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:01:55,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:01:55,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:01:55,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457550000] [2024-06-28 01:01:55,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457550000] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:01:55,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:01:55,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 01:01:55,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132286494] [2024-06-28 01:01:55,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:01:55,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 01:01:55,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:01:55,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 01:01:55,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 01:01:56,013 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 01:01:56,014 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 191 transitions, 2266 flow. Second operand has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:56,014 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:01:56,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 01:01:56,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:01:56,417 INFO L124 PetriNetUnfolderBase]: 2435/3970 cut-off events. [2024-06-28 01:01:56,417 INFO L125 PetriNetUnfolderBase]: For 66708/66708 co-relation queries the response was YES. [2024-06-28 01:01:56,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23215 conditions, 3970 events. 2435/3970 cut-off events. For 66708/66708 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 24719 event pairs, 453 based on Foata normal form. 14/3975 useless extension candidates. Maximal degree in co-relation 23155. Up to 3003 conditions per place. [2024-06-28 01:01:56,447 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 166 selfloop transitions, 54 changer transitions 0/234 dead transitions. [2024-06-28 01:01:56,447 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 234 transitions, 3006 flow [2024-06-28 01:01:56,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 01:01:56,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 01:01:56,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 220 transitions. [2024-06-28 01:01:56,448 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6832298136645962 [2024-06-28 01:01:56,448 INFO L175 Difference]: Start difference. First operand has 142 places, 191 transitions, 2266 flow. Second operand 7 states and 220 transitions. [2024-06-28 01:01:56,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 234 transitions, 3006 flow [2024-06-28 01:01:56,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 234 transitions, 2790 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-28 01:01:56,574 INFO L231 Difference]: Finished difference. Result has 143 places, 194 transitions, 2225 flow [2024-06-28 01:01:56,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2050, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2225, PETRI_PLACES=143, PETRI_TRANSITIONS=194} [2024-06-28 01:01:56,575 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 93 predicate places. [2024-06-28 01:01:56,575 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 194 transitions, 2225 flow [2024-06-28 01:01:56,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:56,575 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:01:56,575 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:01:56,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-28 01:01:56,575 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:01:56,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:01:56,576 INFO L85 PathProgramCache]: Analyzing trace with hash -525662320, now seen corresponding path program 3 times [2024-06-28 01:01:56,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:01:56,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475173690] [2024-06-28 01:01:56,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:01:56,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:01:56,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:01:56,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:01:56,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:01:56,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475173690] [2024-06-28 01:01:56,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475173690] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:01:56,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:01:56,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 01:01:56,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66819340] [2024-06-28 01:01:56,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:01:56,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 01:01:56,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:01:56,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 01:01:56,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 01:01:56,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 01:01:56,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 194 transitions, 2225 flow. Second operand has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:56,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:01:56,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 01:01:56,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:01:57,148 INFO L124 PetriNetUnfolderBase]: 2557/4286 cut-off events. [2024-06-28 01:01:57,148 INFO L125 PetriNetUnfolderBase]: For 72380/72380 co-relation queries the response was YES. [2024-06-28 01:01:57,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24018 conditions, 4286 events. 2557/4286 cut-off events. For 72380/72380 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 27496 event pairs, 552 based on Foata normal form. 14/4286 useless extension candidates. Maximal degree in co-relation 23958. Up to 3189 conditions per place. [2024-06-28 01:01:57,182 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 172 selfloop transitions, 51 changer transitions 0/237 dead transitions. [2024-06-28 01:01:57,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 237 transitions, 2983 flow [2024-06-28 01:01:57,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 01:01:57,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 01:01:57,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 220 transitions. [2024-06-28 01:01:57,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6832298136645962 [2024-06-28 01:01:57,183 INFO L175 Difference]: Start difference. First operand has 143 places, 194 transitions, 2225 flow. Second operand 7 states and 220 transitions. [2024-06-28 01:01:57,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 237 transitions, 2983 flow [2024-06-28 01:01:57,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 237 transitions, 2842 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-28 01:01:57,274 INFO L231 Difference]: Finished difference. Result has 145 places, 197 transitions, 2259 flow [2024-06-28 01:01:57,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2084, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2259, PETRI_PLACES=145, PETRI_TRANSITIONS=197} [2024-06-28 01:01:57,275 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 95 predicate places. [2024-06-28 01:01:57,275 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 197 transitions, 2259 flow [2024-06-28 01:01:57,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:57,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:01:57,275 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:01:57,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-28 01:01:57,275 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:01:57,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:01:57,275 INFO L85 PathProgramCache]: Analyzing trace with hash -259638610, now seen corresponding path program 4 times [2024-06-28 01:01:57,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:01:57,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482645508] [2024-06-28 01:01:57,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:01:57,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:01:57,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:01:57,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:01:57,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:01:57,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482645508] [2024-06-28 01:01:57,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482645508] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:01:57,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:01:57,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 01:01:57,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669775964] [2024-06-28 01:01:57,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:01:57,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 01:01:57,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:01:57,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 01:01:57,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 01:01:57,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 01:01:57,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 197 transitions, 2259 flow. Second operand has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:57,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:01:57,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 01:01:57,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:01:57,815 INFO L124 PetriNetUnfolderBase]: 2808/4617 cut-off events. [2024-06-28 01:01:57,815 INFO L125 PetriNetUnfolderBase]: For 80900/80900 co-relation queries the response was YES. [2024-06-28 01:01:57,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26084 conditions, 4617 events. 2808/4617 cut-off events. For 80900/80900 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 29943 event pairs, 451 based on Foata normal form. 14/4622 useless extension candidates. Maximal degree in co-relation 26023. Up to 2870 conditions per place. [2024-06-28 01:01:57,846 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 172 selfloop transitions, 61 changer transitions 0/247 dead transitions. [2024-06-28 01:01:57,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 247 transitions, 3147 flow [2024-06-28 01:01:57,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 01:01:57,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 01:01:57,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 224 transitions. [2024-06-28 01:01:57,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6956521739130435 [2024-06-28 01:01:57,847 INFO L175 Difference]: Start difference. First operand has 145 places, 197 transitions, 2259 flow. Second operand 7 states and 224 transitions. [2024-06-28 01:01:57,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 247 transitions, 3147 flow [2024-06-28 01:01:57,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 247 transitions, 3006 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-28 01:01:57,965 INFO L231 Difference]: Finished difference. Result has 148 places, 202 transitions, 2365 flow [2024-06-28 01:01:57,966 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2118, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2365, PETRI_PLACES=148, PETRI_TRANSITIONS=202} [2024-06-28 01:01:57,966 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 98 predicate places. [2024-06-28 01:01:57,966 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 202 transitions, 2365 flow [2024-06-28 01:01:57,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:57,966 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:01:57,966 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:01:57,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-28 01:01:57,966 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:01:57,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:01:57,967 INFO L85 PathProgramCache]: Analyzing trace with hash -750775344, now seen corresponding path program 2 times [2024-06-28 01:01:57,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:01:57,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321817460] [2024-06-28 01:01:57,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:01:57,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:01:57,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:01:58,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:01:58,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:01:58,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321817460] [2024-06-28 01:01:58,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321817460] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:01:58,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:01:58,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 01:01:58,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307750447] [2024-06-28 01:01:58,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:01:58,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 01:01:58,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:01:58,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 01:01:58,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-28 01:01:58,053 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 46 [2024-06-28 01:01:58,053 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 202 transitions, 2365 flow. Second operand has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:58,054 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:01:58,054 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 46 [2024-06-28 01:01:58,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:01:58,489 INFO L124 PetriNetUnfolderBase]: 2565/4318 cut-off events. [2024-06-28 01:01:58,489 INFO L125 PetriNetUnfolderBase]: For 77502/77512 co-relation queries the response was YES. [2024-06-28 01:01:58,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24851 conditions, 4318 events. 2565/4318 cut-off events. For 77502/77512 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 28563 event pairs, 551 based on Foata normal form. 2/4311 useless extension candidates. Maximal degree in co-relation 24788. Up to 3415 conditions per place. [2024-06-28 01:01:58,525 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 159 selfloop transitions, 26 changer transitions 0/217 dead transitions. [2024-06-28 01:01:58,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 217 transitions, 2769 flow [2024-06-28 01:01:58,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 01:01:58,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 01:01:58,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 148 transitions. [2024-06-28 01:01:58,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6434782608695652 [2024-06-28 01:01:58,526 INFO L175 Difference]: Start difference. First operand has 148 places, 202 transitions, 2365 flow. Second operand 5 states and 148 transitions. [2024-06-28 01:01:58,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 217 transitions, 2769 flow [2024-06-28 01:01:58,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 217 transitions, 2630 flow, removed 37 selfloop flow, removed 3 redundant places. [2024-06-28 01:01:58,670 INFO L231 Difference]: Finished difference. Result has 150 places, 202 transitions, 2289 flow [2024-06-28 01:01:58,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2226, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2289, PETRI_PLACES=150, PETRI_TRANSITIONS=202} [2024-06-28 01:01:58,671 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 100 predicate places. [2024-06-28 01:01:58,671 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 202 transitions, 2289 flow [2024-06-28 01:01:58,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:58,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:01:58,671 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:01:58,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-28 01:01:58,672 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:01:58,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:01:58,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1472360050, now seen corresponding path program 1 times [2024-06-28 01:01:58,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:01:58,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723564781] [2024-06-28 01:01:58,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:01:58,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:01:58,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:01:58,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:01:58,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:01:58,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723564781] [2024-06-28 01:01:58,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723564781] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:01:58,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:01:58,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 01:01:58,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636116815] [2024-06-28 01:01:58,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:01:58,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 01:01:58,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:01:58,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 01:01:58,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-28 01:01:58,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 01:01:58,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 202 transitions, 2289 flow. Second operand has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:58,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:01:58,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 01:01:58,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:01:59,247 INFO L124 PetriNetUnfolderBase]: 2800/4650 cut-off events. [2024-06-28 01:01:59,247 INFO L125 PetriNetUnfolderBase]: For 79673/79673 co-relation queries the response was YES. [2024-06-28 01:01:59,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26326 conditions, 4650 events. 2800/4650 cut-off events. For 79673/79673 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 30448 event pairs, 626 based on Foata normal form. 2/4648 useless extension candidates. Maximal degree in co-relation 26261. Up to 4024 conditions per place. [2024-06-28 01:01:59,280 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 192 selfloop transitions, 18 changer transitions 0/224 dead transitions. [2024-06-28 01:01:59,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 224 transitions, 2848 flow [2024-06-28 01:01:59,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 01:01:59,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 01:01:59,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 148 transitions. [2024-06-28 01:01:59,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6434782608695652 [2024-06-28 01:01:59,281 INFO L175 Difference]: Start difference. First operand has 150 places, 202 transitions, 2289 flow. Second operand 5 states and 148 transitions. [2024-06-28 01:01:59,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 224 transitions, 2848 flow [2024-06-28 01:01:59,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 224 transitions, 2772 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-28 01:01:59,391 INFO L231 Difference]: Finished difference. Result has 150 places, 205 transitions, 2298 flow [2024-06-28 01:01:59,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2213, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2298, PETRI_PLACES=150, PETRI_TRANSITIONS=205} [2024-06-28 01:01:59,393 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 100 predicate places. [2024-06-28 01:01:59,393 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 205 transitions, 2298 flow [2024-06-28 01:01:59,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:59,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:01:59,393 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:01:59,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-28 01:01:59,393 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:01:59,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:01:59,393 INFO L85 PathProgramCache]: Analyzing trace with hash -750768400, now seen corresponding path program 2 times [2024-06-28 01:01:59,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:01:59,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674146969] [2024-06-28 01:01:59,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:01:59,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:01:59,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:01:59,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:01:59,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:01:59,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674146969] [2024-06-28 01:01:59,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674146969] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:01:59,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:01:59,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 01:01:59,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800214749] [2024-06-28 01:01:59,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:01:59,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 01:01:59,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:01:59,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 01:01:59,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-28 01:01:59,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 01:01:59,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 205 transitions, 2298 flow. Second operand has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:59,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:01:59,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 01:01:59,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:01:59,919 INFO L124 PetriNetUnfolderBase]: 2782/4547 cut-off events. [2024-06-28 01:01:59,920 INFO L125 PetriNetUnfolderBase]: For 81976/81976 co-relation queries the response was YES. [2024-06-28 01:01:59,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26158 conditions, 4547 events. 2782/4547 cut-off events. For 81976/81976 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 29212 event pairs, 555 based on Foata normal form. 1/4540 useless extension candidates. Maximal degree in co-relation 26092. Up to 3998 conditions per place. [2024-06-28 01:01:59,953 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 187 selfloop transitions, 19 changer transitions 0/220 dead transitions. [2024-06-28 01:01:59,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 220 transitions, 2744 flow [2024-06-28 01:01:59,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 01:01:59,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 01:01:59,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 145 transitions. [2024-06-28 01:01:59,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6304347826086957 [2024-06-28 01:01:59,954 INFO L175 Difference]: Start difference. First operand has 150 places, 205 transitions, 2298 flow. Second operand 5 states and 145 transitions. [2024-06-28 01:01:59,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 220 transitions, 2744 flow [2024-06-28 01:02:00,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 220 transitions, 2717 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-28 01:02:00,103 INFO L231 Difference]: Finished difference. Result has 153 places, 205 transitions, 2315 flow [2024-06-28 01:02:00,103 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2271, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2315, PETRI_PLACES=153, PETRI_TRANSITIONS=205} [2024-06-28 01:02:00,103 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 103 predicate places. [2024-06-28 01:02:00,103 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 205 transitions, 2315 flow [2024-06-28 01:02:00,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:00,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:00,104 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:00,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-28 01:02:00,104 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:02:00,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:00,104 INFO L85 PathProgramCache]: Analyzing trace with hash -59249160, now seen corresponding path program 1 times [2024-06-28 01:02:00,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:00,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141567237] [2024-06-28 01:02:00,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:00,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:00,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:00,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:00,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:00,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141567237] [2024-06-28 01:02:00,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141567237] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:00,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:00,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 01:02:00,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400540281] [2024-06-28 01:02:00,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:00,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 01:02:00,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:00,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 01:02:00,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 01:02:00,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 01:02:00,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 205 transitions, 2315 flow. Second operand has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:00,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:00,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 01:02:00,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:00,752 INFO L124 PetriNetUnfolderBase]: 2844/4718 cut-off events. [2024-06-28 01:02:00,752 INFO L125 PetriNetUnfolderBase]: For 91792/91792 co-relation queries the response was YES. [2024-06-28 01:02:00,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27202 conditions, 4718 events. 2844/4718 cut-off events. For 91792/91792 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 30861 event pairs, 801 based on Foata normal form. 4/4690 useless extension candidates. Maximal degree in co-relation 27135. Up to 4003 conditions per place. [2024-06-28 01:02:00,789 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 225 selfloop transitions, 19 changer transitions 0/258 dead transitions. [2024-06-28 01:02:00,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 258 transitions, 3131 flow [2024-06-28 01:02:00,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 01:02:00,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 01:02:00,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 237 transitions. [2024-06-28 01:02:00,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6440217391304348 [2024-06-28 01:02:00,790 INFO L175 Difference]: Start difference. First operand has 153 places, 205 transitions, 2315 flow. Second operand 8 states and 237 transitions. [2024-06-28 01:02:00,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 258 transitions, 3131 flow [2024-06-28 01:02:00,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 258 transitions, 3068 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-28 01:02:00,917 INFO L231 Difference]: Finished difference. Result has 156 places, 209 transitions, 2405 flow [2024-06-28 01:02:00,917 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2252, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2405, PETRI_PLACES=156, PETRI_TRANSITIONS=209} [2024-06-28 01:02:00,917 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 106 predicate places. [2024-06-28 01:02:00,917 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 209 transitions, 2405 flow [2024-06-28 01:02:00,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:00,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:00,918 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:00,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-28 01:02:00,918 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:02:00,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:00,918 INFO L85 PathProgramCache]: Analyzing trace with hash 478811816, now seen corresponding path program 2 times [2024-06-28 01:02:00,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:00,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881703706] [2024-06-28 01:02:00,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:00,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:00,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:01,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:01,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:01,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881703706] [2024-06-28 01:02:01,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881703706] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:01,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:01,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 01:02:01,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686101082] [2024-06-28 01:02:01,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:01,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 01:02:01,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:01,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 01:02:01,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 01:02:01,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 01:02:01,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 209 transitions, 2405 flow. Second operand has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:01,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:01,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 01:02:01,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:01,572 INFO L124 PetriNetUnfolderBase]: 2836/4690 cut-off events. [2024-06-28 01:02:01,572 INFO L125 PetriNetUnfolderBase]: For 94927/94927 co-relation queries the response was YES. [2024-06-28 01:02:01,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27305 conditions, 4690 events. 2836/4690 cut-off events. For 94927/94927 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 30607 event pairs, 951 based on Foata normal form. 4/4667 useless extension candidates. Maximal degree in co-relation 27237. Up to 4068 conditions per place. [2024-06-28 01:02:01,606 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 220 selfloop transitions, 15 changer transitions 0/249 dead transitions. [2024-06-28 01:02:01,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 249 transitions, 2971 flow [2024-06-28 01:02:01,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 01:02:01,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 01:02:01,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 207 transitions. [2024-06-28 01:02:01,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2024-06-28 01:02:01,608 INFO L175 Difference]: Start difference. First operand has 156 places, 209 transitions, 2405 flow. Second operand 7 states and 207 transitions. [2024-06-28 01:02:01,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 249 transitions, 2971 flow [2024-06-28 01:02:01,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 249 transitions, 2861 flow, removed 47 selfloop flow, removed 4 redundant places. [2024-06-28 01:02:01,769 INFO L231 Difference]: Finished difference. Result has 159 places, 209 transitions, 2332 flow [2024-06-28 01:02:01,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2295, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2332, PETRI_PLACES=159, PETRI_TRANSITIONS=209} [2024-06-28 01:02:01,769 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 109 predicate places. [2024-06-28 01:02:01,770 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 209 transitions, 2332 flow [2024-06-28 01:02:01,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:01,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:01,770 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:01,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-28 01:02:01,770 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:02:01,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:01,770 INFO L85 PathProgramCache]: Analyzing trace with hash 762538630, now seen corresponding path program 3 times [2024-06-28 01:02:01,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:01,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039686161] [2024-06-28 01:02:01,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:01,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:01,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:01,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:01,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:01,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039686161] [2024-06-28 01:02:01,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039686161] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:01,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:01,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 01:02:01,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905597111] [2024-06-28 01:02:01,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:01,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 01:02:01,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:01,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 01:02:01,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 01:02:01,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 01:02:01,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 209 transitions, 2332 flow. Second operand has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:01,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:01,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 01:02:01,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:02,411 INFO L124 PetriNetUnfolderBase]: 2863/4786 cut-off events. [2024-06-28 01:02:02,412 INFO L125 PetriNetUnfolderBase]: For 100237/100240 co-relation queries the response was YES. [2024-06-28 01:02:02,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27492 conditions, 4786 events. 2863/4786 cut-off events. For 100237/100240 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 31648 event pairs, 931 based on Foata normal form. 6/4757 useless extension candidates. Maximal degree in co-relation 27422. Up to 4044 conditions per place. [2024-06-28 01:02:02,451 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 207 selfloop transitions, 27 changer transitions 0/248 dead transitions. [2024-06-28 01:02:02,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 248 transitions, 2944 flow [2024-06-28 01:02:02,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 01:02:02,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 01:02:02,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 208 transitions. [2024-06-28 01:02:02,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6459627329192547 [2024-06-28 01:02:02,453 INFO L175 Difference]: Start difference. First operand has 159 places, 209 transitions, 2332 flow. Second operand 7 states and 208 transitions. [2024-06-28 01:02:02,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 248 transitions, 2944 flow [2024-06-28 01:02:02,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 248 transitions, 2909 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-28 01:02:02,596 INFO L231 Difference]: Finished difference. Result has 160 places, 211 transitions, 2418 flow [2024-06-28 01:02:02,596 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2297, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2418, PETRI_PLACES=160, PETRI_TRANSITIONS=211} [2024-06-28 01:02:02,596 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 110 predicate places. [2024-06-28 01:02:02,596 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 211 transitions, 2418 flow [2024-06-28 01:02:02,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:02,596 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:02,596 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:02,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-28 01:02:02,597 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:02:02,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:02,597 INFO L85 PathProgramCache]: Analyzing trace with hash -967469818, now seen corresponding path program 4 times [2024-06-28 01:02:02,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:02,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617767454] [2024-06-28 01:02:02,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:02,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:02,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:02,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:02,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:02,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617767454] [2024-06-28 01:02:02,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617767454] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:02,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:02,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 01:02:02,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649191800] [2024-06-28 01:02:02,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:02,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 01:02:02,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:02,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 01:02:02,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 01:02:02,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 01:02:02,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 211 transitions, 2418 flow. Second operand has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:02,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:02,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 01:02:02,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:03,231 INFO L124 PetriNetUnfolderBase]: 2855/4769 cut-off events. [2024-06-28 01:02:03,232 INFO L125 PetriNetUnfolderBase]: For 104518/104518 co-relation queries the response was YES. [2024-06-28 01:02:03,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27624 conditions, 4769 events. 2855/4769 cut-off events. For 104518/104518 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 31589 event pairs, 941 based on Foata normal form. 4/4737 useless extension candidates. Maximal degree in co-relation 27553. Up to 4032 conditions per place. [2024-06-28 01:02:03,271 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 206 selfloop transitions, 27 changer transitions 0/247 dead transitions. [2024-06-28 01:02:03,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 247 transitions, 3024 flow [2024-06-28 01:02:03,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 01:02:03,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 01:02:03,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 205 transitions. [2024-06-28 01:02:03,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6366459627329193 [2024-06-28 01:02:03,272 INFO L175 Difference]: Start difference. First operand has 160 places, 211 transitions, 2418 flow. Second operand 7 states and 205 transitions. [2024-06-28 01:02:03,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 247 transitions, 3024 flow [2024-06-28 01:02:03,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 247 transitions, 2921 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-28 01:02:03,437 INFO L231 Difference]: Finished difference. Result has 162 places, 213 transitions, 2440 flow [2024-06-28 01:02:03,437 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2315, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2440, PETRI_PLACES=162, PETRI_TRANSITIONS=213} [2024-06-28 01:02:03,437 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 112 predicate places. [2024-06-28 01:02:03,437 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 213 transitions, 2440 flow [2024-06-28 01:02:03,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:03,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:03,437 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:03,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-28 01:02:03,444 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:02:03,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:03,445 INFO L85 PathProgramCache]: Analyzing trace with hash 1601479875, now seen corresponding path program 1 times [2024-06-28 01:02:03,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:03,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291578262] [2024-06-28 01:02:03,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:03,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:03,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:03,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:03,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:03,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291578262] [2024-06-28 01:02:03,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291578262] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:03,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:03,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 01:02:03,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603046938] [2024-06-28 01:02:03,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:03,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 01:02:03,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:03,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 01:02:03,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 01:02:03,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 01:02:03,525 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 213 transitions, 2440 flow. Second operand has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:03,525 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:03,525 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 01:02:03,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:04,070 INFO L124 PetriNetUnfolderBase]: 2917/4756 cut-off events. [2024-06-28 01:02:04,070 INFO L125 PetriNetUnfolderBase]: For 109112/109112 co-relation queries the response was YES. [2024-06-28 01:02:04,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28262 conditions, 4756 events. 2917/4756 cut-off events. For 109112/109112 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 30645 event pairs, 501 based on Foata normal form. 4/4751 useless extension candidates. Maximal degree in co-relation 28190. Up to 3797 conditions per place. [2024-06-28 01:02:04,113 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 176 selfloop transitions, 57 changer transitions 0/247 dead transitions. [2024-06-28 01:02:04,113 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 247 transitions, 3258 flow [2024-06-28 01:02:04,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 01:02:04,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 01:02:04,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 181 transitions. [2024-06-28 01:02:04,114 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6557971014492754 [2024-06-28 01:02:04,114 INFO L175 Difference]: Start difference. First operand has 162 places, 213 transitions, 2440 flow. Second operand 6 states and 181 transitions. [2024-06-28 01:02:04,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 247 transitions, 3258 flow [2024-06-28 01:02:04,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 247 transitions, 3151 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-28 01:02:04,341 INFO L231 Difference]: Finished difference. Result has 164 places, 224 transitions, 2653 flow [2024-06-28 01:02:04,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2333, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2653, PETRI_PLACES=164, PETRI_TRANSITIONS=224} [2024-06-28 01:02:04,342 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 114 predicate places. [2024-06-28 01:02:04,342 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 224 transitions, 2653 flow [2024-06-28 01:02:04,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:04,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:04,342 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:04,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-28 01:02:04,342 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:02:04,343 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:04,343 INFO L85 PathProgramCache]: Analyzing trace with hash -1798982751, now seen corresponding path program 2 times [2024-06-28 01:02:04,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:04,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973830134] [2024-06-28 01:02:04,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:04,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:04,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:04,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:04,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:04,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973830134] [2024-06-28 01:02:04,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973830134] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:04,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:04,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 01:02:04,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306238882] [2024-06-28 01:02:04,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:04,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 01:02:04,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:04,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 01:02:04,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 01:02:04,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 01:02:04,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 224 transitions, 2653 flow. Second operand has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:04,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:04,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 01:02:04,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:04,914 INFO L124 PetriNetUnfolderBase]: 2941/4884 cut-off events. [2024-06-28 01:02:04,914 INFO L125 PetriNetUnfolderBase]: For 114189/114189 co-relation queries the response was YES. [2024-06-28 01:02:04,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29030 conditions, 4884 events. 2941/4884 cut-off events. For 114189/114189 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 32198 event pairs, 569 based on Foata normal form. 2/4858 useless extension candidates. Maximal degree in co-relation 28956. Up to 3811 conditions per place. [2024-06-28 01:02:04,955 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 171 selfloop transitions, 64 changer transitions 0/249 dead transitions. [2024-06-28 01:02:04,955 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 249 transitions, 3452 flow [2024-06-28 01:02:04,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 01:02:04,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 01:02:04,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 179 transitions. [2024-06-28 01:02:04,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6485507246376812 [2024-06-28 01:02:04,956 INFO L175 Difference]: Start difference. First operand has 164 places, 224 transitions, 2653 flow. Second operand 6 states and 179 transitions. [2024-06-28 01:02:04,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 249 transitions, 3452 flow [2024-06-28 01:02:05,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 249 transitions, 3372 flow, removed 15 selfloop flow, removed 2 redundant places. [2024-06-28 01:02:05,121 INFO L231 Difference]: Finished difference. Result has 168 places, 228 transitions, 2785 flow [2024-06-28 01:02:05,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2575, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2785, PETRI_PLACES=168, PETRI_TRANSITIONS=228} [2024-06-28 01:02:05,122 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 118 predicate places. [2024-06-28 01:02:05,122 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 228 transitions, 2785 flow [2024-06-28 01:02:05,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:05,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:05,122 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:05,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-28 01:02:05,122 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:02:05,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:05,122 INFO L85 PathProgramCache]: Analyzing trace with hash 1091102345, now seen corresponding path program 3 times [2024-06-28 01:02:05,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:05,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704977594] [2024-06-28 01:02:05,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:05,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:05,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:05,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:05,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:05,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704977594] [2024-06-28 01:02:05,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704977594] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:05,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:05,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 01:02:05,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678346399] [2024-06-28 01:02:05,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:05,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 01:02:05,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:05,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 01:02:05,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 01:02:05,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 01:02:05,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 228 transitions, 2785 flow. Second operand has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:05,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:05,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 01:02:05,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:05,813 INFO L124 PetriNetUnfolderBase]: 2935/4883 cut-off events. [2024-06-28 01:02:05,813 INFO L125 PetriNetUnfolderBase]: For 118844/118844 co-relation queries the response was YES. [2024-06-28 01:02:05,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29070 conditions, 4883 events. 2935/4883 cut-off events. For 118844/118844 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 32257 event pairs, 561 based on Foata normal form. 2/4861 useless extension candidates. Maximal degree in co-relation 28995. Up to 3808 conditions per place. [2024-06-28 01:02:05,858 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 164 selfloop transitions, 70 changer transitions 0/248 dead transitions. [2024-06-28 01:02:05,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 248 transitions, 3441 flow [2024-06-28 01:02:05,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 01:02:05,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 01:02:05,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 179 transitions. [2024-06-28 01:02:05,859 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6485507246376812 [2024-06-28 01:02:05,859 INFO L175 Difference]: Start difference. First operand has 168 places, 228 transitions, 2785 flow. Second operand 6 states and 179 transitions. [2024-06-28 01:02:05,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 248 transitions, 3441 flow [2024-06-28 01:02:06,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 248 transitions, 3219 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-28 01:02:06,087 INFO L231 Difference]: Finished difference. Result has 169 places, 228 transitions, 2710 flow [2024-06-28 01:02:06,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2563, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2710, PETRI_PLACES=169, PETRI_TRANSITIONS=228} [2024-06-28 01:02:06,087 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 119 predicate places. [2024-06-28 01:02:06,087 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 228 transitions, 2710 flow [2024-06-28 01:02:06,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:06,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:06,088 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:06,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-28 01:02:06,088 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:02:06,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:06,088 INFO L85 PathProgramCache]: Analyzing trace with hash 1778857473, now seen corresponding path program 1 times [2024-06-28 01:02:06,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:06,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149038270] [2024-06-28 01:02:06,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:06,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:06,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:06,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:06,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:06,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149038270] [2024-06-28 01:02:06,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149038270] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:06,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:06,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 01:02:06,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498605862] [2024-06-28 01:02:06,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:06,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 01:02:06,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:06,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 01:02:06,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 01:02:06,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 46 [2024-06-28 01:02:06,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 228 transitions, 2710 flow. Second operand has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:06,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:06,193 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 46 [2024-06-28 01:02:06,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:06,802 INFO L124 PetriNetUnfolderBase]: 2770/4692 cut-off events. [2024-06-28 01:02:06,802 INFO L125 PetriNetUnfolderBase]: For 123083/123109 co-relation queries the response was YES. [2024-06-28 01:02:06,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27443 conditions, 4692 events. 2770/4692 cut-off events. For 123083/123109 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 31778 event pairs, 923 based on Foata normal form. 14/4671 useless extension candidates. Maximal degree in co-relation 27368. Up to 3607 conditions per place. [2024-06-28 01:02:06,842 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 186 selfloop transitions, 30 changer transitions 0/252 dead transitions. [2024-06-28 01:02:06,842 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 252 transitions, 3232 flow [2024-06-28 01:02:06,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 01:02:06,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 01:02:06,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 176 transitions. [2024-06-28 01:02:06,843 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6376811594202898 [2024-06-28 01:02:06,844 INFO L175 Difference]: Start difference. First operand has 169 places, 228 transitions, 2710 flow. Second operand 6 states and 176 transitions. [2024-06-28 01:02:06,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 252 transitions, 3232 flow [2024-06-28 01:02:07,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 252 transitions, 3059 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-28 01:02:07,018 INFO L231 Difference]: Finished difference. Result has 169 places, 230 transitions, 2634 flow [2024-06-28 01:02:07,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2537, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2634, PETRI_PLACES=169, PETRI_TRANSITIONS=230} [2024-06-28 01:02:07,018 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 119 predicate places. [2024-06-28 01:02:07,018 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 230 transitions, 2634 flow [2024-06-28 01:02:07,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:07,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:07,019 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:07,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-28 01:02:07,019 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:02:07,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:07,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1929423699, now seen corresponding path program 1 times [2024-06-28 01:02:07,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:07,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723678481] [2024-06-28 01:02:07,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:07,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:07,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:07,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:07,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:07,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723678481] [2024-06-28 01:02:07,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723678481] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:07,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:07,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:02:07,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401487997] [2024-06-28 01:02:07,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:07,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:02:07,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:07,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:02:07,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:02:07,149 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 01:02:07,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 230 transitions, 2634 flow. Second operand has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:07,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:07,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 01:02:07,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:08,065 INFO L124 PetriNetUnfolderBase]: 4098/6636 cut-off events. [2024-06-28 01:02:08,065 INFO L125 PetriNetUnfolderBase]: For 220866/220866 co-relation queries the response was YES. [2024-06-28 01:02:08,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40266 conditions, 6636 events. 4098/6636 cut-off events. For 220866/220866 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 45213 event pairs, 779 based on Foata normal form. 42/6660 useless extension candidates. Maximal degree in co-relation 40194. Up to 4069 conditions per place. [2024-06-28 01:02:08,118 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 252 selfloop transitions, 45 changer transitions 0/311 dead transitions. [2024-06-28 01:02:08,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 311 transitions, 3940 flow [2024-06-28 01:02:08,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 01:02:08,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 01:02:08,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 294 transitions. [2024-06-28 01:02:08,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7101449275362319 [2024-06-28 01:02:08,120 INFO L175 Difference]: Start difference. First operand has 169 places, 230 transitions, 2634 flow. Second operand 9 states and 294 transitions. [2024-06-28 01:02:08,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 311 transitions, 3940 flow [2024-06-28 01:02:08,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 311 transitions, 3867 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-28 01:02:08,361 INFO L231 Difference]: Finished difference. Result has 176 places, 236 transitions, 2819 flow [2024-06-28 01:02:08,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2561, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2819, PETRI_PLACES=176, PETRI_TRANSITIONS=236} [2024-06-28 01:02:08,362 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 126 predicate places. [2024-06-28 01:02:08,362 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 236 transitions, 2819 flow [2024-06-28 01:02:08,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:08,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:08,362 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:08,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-28 01:02:08,362 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:02:08,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:08,362 INFO L85 PathProgramCache]: Analyzing trace with hash 2045105521, now seen corresponding path program 2 times [2024-06-28 01:02:08,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:08,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527357523] [2024-06-28 01:02:08,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:08,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:08,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:08,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:08,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:08,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527357523] [2024-06-28 01:02:08,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527357523] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:08,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:08,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:02:08,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51407118] [2024-06-28 01:02:08,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:08,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:02:08,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:08,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:02:08,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:02:08,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 01:02:08,509 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 236 transitions, 2819 flow. Second operand has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:08,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:08,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 01:02:08,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:09,395 INFO L124 PetriNetUnfolderBase]: 4411/7214 cut-off events. [2024-06-28 01:02:09,395 INFO L125 PetriNetUnfolderBase]: For 247023/247023 co-relation queries the response was YES. [2024-06-28 01:02:09,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43481 conditions, 7214 events. 4411/7214 cut-off events. For 247023/247023 co-relation queries the response was YES. Maximal size of possible extension queue 456. Compared 50548 event pairs, 1085 based on Foata normal form. 50/7257 useless extension candidates. Maximal degree in co-relation 43406. Up to 5838 conditions per place. [2024-06-28 01:02:09,457 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 234 selfloop transitions, 42 changer transitions 0/290 dead transitions. [2024-06-28 01:02:09,457 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 290 transitions, 3660 flow [2024-06-28 01:02:09,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 01:02:09,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 01:02:09,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 253 transitions. [2024-06-28 01:02:09,458 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6875 [2024-06-28 01:02:09,458 INFO L175 Difference]: Start difference. First operand has 176 places, 236 transitions, 2819 flow. Second operand 8 states and 253 transitions. [2024-06-28 01:02:09,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 290 transitions, 3660 flow [2024-06-28 01:02:09,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 290 transitions, 3557 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-28 01:02:09,802 INFO L231 Difference]: Finished difference. Result has 180 places, 238 transitions, 2880 flow [2024-06-28 01:02:09,802 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2716, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2880, PETRI_PLACES=180, PETRI_TRANSITIONS=238} [2024-06-28 01:02:09,802 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 130 predicate places. [2024-06-28 01:02:09,802 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 238 transitions, 2880 flow [2024-06-28 01:02:09,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:09,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:09,803 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:09,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-28 01:02:09,803 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:02:09,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:09,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1432995623, now seen corresponding path program 3 times [2024-06-28 01:02:09,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:09,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40917099] [2024-06-28 01:02:09,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:09,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:09,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:09,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:09,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:09,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40917099] [2024-06-28 01:02:09,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40917099] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:09,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:09,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:02:09,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030022875] [2024-06-28 01:02:09,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:09,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:02:09,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:09,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:02:09,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:02:09,909 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 01:02:09,910 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 238 transitions, 2880 flow. Second operand has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:09,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:09,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 01:02:09,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:10,782 INFO L124 PetriNetUnfolderBase]: 4420/7244 cut-off events. [2024-06-28 01:02:10,782 INFO L125 PetriNetUnfolderBase]: For 218960/218960 co-relation queries the response was YES. [2024-06-28 01:02:10,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42272 conditions, 7244 events. 4420/7244 cut-off events. For 218960/218960 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 50935 event pairs, 923 based on Foata normal form. 42/7275 useless extension candidates. Maximal degree in co-relation 42195. Up to 5069 conditions per place. [2024-06-28 01:02:10,853 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 244 selfloop transitions, 43 changer transitions 0/301 dead transitions. [2024-06-28 01:02:10,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 301 transitions, 3910 flow [2024-06-28 01:02:10,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 01:02:10,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 01:02:10,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 258 transitions. [2024-06-28 01:02:10,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7010869565217391 [2024-06-28 01:02:10,854 INFO L175 Difference]: Start difference. First operand has 180 places, 238 transitions, 2880 flow. Second operand 8 states and 258 transitions. [2024-06-28 01:02:10,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 301 transitions, 3910 flow [2024-06-28 01:02:11,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 301 transitions, 3783 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-28 01:02:11,359 INFO L231 Difference]: Finished difference. Result has 183 places, 242 transitions, 2981 flow [2024-06-28 01:02:11,359 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2753, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2981, PETRI_PLACES=183, PETRI_TRANSITIONS=242} [2024-06-28 01:02:11,359 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 133 predicate places. [2024-06-28 01:02:11,360 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 242 transitions, 2981 flow [2024-06-28 01:02:11,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:11,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:11,360 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:11,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-28 01:02:11,360 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:02:11,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:11,361 INFO L85 PathProgramCache]: Analyzing trace with hash -1917067921, now seen corresponding path program 4 times [2024-06-28 01:02:11,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:11,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391724043] [2024-06-28 01:02:11,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:11,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:11,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:11,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:11,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:11,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391724043] [2024-06-28 01:02:11,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391724043] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:11,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:11,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:02:11,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280410939] [2024-06-28 01:02:11,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:11,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:02:11,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:11,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:02:11,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:02:11,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 01:02:11,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 242 transitions, 2981 flow. Second operand has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:11,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:11,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 01:02:11,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:12,568 INFO L124 PetriNetUnfolderBase]: 4791/7900 cut-off events. [2024-06-28 01:02:12,568 INFO L125 PetriNetUnfolderBase]: For 251645/251645 co-relation queries the response was YES. [2024-06-28 01:02:12,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45156 conditions, 7900 events. 4791/7900 cut-off events. For 251645/251645 co-relation queries the response was YES. Maximal size of possible extension queue 505. Compared 56811 event pairs, 1217 based on Foata normal form. 50/7922 useless extension candidates. Maximal degree in co-relation 45077. Up to 5671 conditions per place. [2024-06-28 01:02:12,624 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 172 selfloop transitions, 110 changer transitions 0/296 dead transitions. [2024-06-28 01:02:12,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 296 transitions, 4085 flow [2024-06-28 01:02:12,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 01:02:12,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 01:02:12,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 260 transitions. [2024-06-28 01:02:12,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7065217391304348 [2024-06-28 01:02:12,625 INFO L175 Difference]: Start difference. First operand has 183 places, 242 transitions, 2981 flow. Second operand 8 states and 260 transitions. [2024-06-28 01:02:12,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 296 transitions, 4085 flow [2024-06-28 01:02:13,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 296 transitions, 3976 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-28 01:02:13,050 INFO L231 Difference]: Finished difference. Result has 187 places, 244 transitions, 3175 flow [2024-06-28 01:02:13,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2872, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3175, PETRI_PLACES=187, PETRI_TRANSITIONS=244} [2024-06-28 01:02:13,050 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 137 predicate places. [2024-06-28 01:02:13,050 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 244 transitions, 3175 flow [2024-06-28 01:02:13,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:13,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:13,051 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:13,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-28 01:02:13,051 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:02:13,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:13,051 INFO L85 PathProgramCache]: Analyzing trace with hash -1314090791, now seen corresponding path program 5 times [2024-06-28 01:02:13,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:13,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397354004] [2024-06-28 01:02:13,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:13,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:13,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:13,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:13,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:13,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397354004] [2024-06-28 01:02:13,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397354004] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:13,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:13,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:02:13,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126853490] [2024-06-28 01:02:13,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:13,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:02:13,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:13,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:02:13,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:02:13,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 01:02:13,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 244 transitions, 3175 flow. Second operand has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:13,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:13,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 01:02:13,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:14,259 INFO L124 PetriNetUnfolderBase]: 5631/9321 cut-off events. [2024-06-28 01:02:14,259 INFO L125 PetriNetUnfolderBase]: For 311853/311853 co-relation queries the response was YES. [2024-06-28 01:02:14,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54894 conditions, 9321 events. 5631/9321 cut-off events. For 311853/311853 co-relation queries the response was YES. Maximal size of possible extension queue 611. Compared 69467 event pairs, 1455 based on Foata normal form. 42/9328 useless extension candidates. Maximal degree in co-relation 54813. Up to 5607 conditions per place. [2024-06-28 01:02:14,344 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 184 selfloop transitions, 111 changer transitions 0/309 dead transitions. [2024-06-28 01:02:14,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 309 transitions, 4601 flow [2024-06-28 01:02:14,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 01:02:14,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 01:02:14,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 266 transitions. [2024-06-28 01:02:14,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7228260869565217 [2024-06-28 01:02:14,345 INFO L175 Difference]: Start difference. First operand has 187 places, 244 transitions, 3175 flow. Second operand 8 states and 266 transitions. [2024-06-28 01:02:14,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 309 transitions, 4601 flow [2024-06-28 01:02:15,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 309 transitions, 4332 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-28 01:02:15,256 INFO L231 Difference]: Finished difference. Result has 190 places, 248 transitions, 3277 flow [2024-06-28 01:02:15,257 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2906, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3277, PETRI_PLACES=190, PETRI_TRANSITIONS=248} [2024-06-28 01:02:15,258 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 140 predicate places. [2024-06-28 01:02:15,258 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 248 transitions, 3277 flow [2024-06-28 01:02:15,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:15,258 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:15,258 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:15,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-28 01:02:15,258 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:02:15,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:15,258 INFO L85 PathProgramCache]: Analyzing trace with hash -1114641131, now seen corresponding path program 6 times [2024-06-28 01:02:15,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:15,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195228888] [2024-06-28 01:02:15,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:15,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:15,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:15,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:15,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:15,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195228888] [2024-06-28 01:02:15,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195228888] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:15,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:15,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:02:15,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606353048] [2024-06-28 01:02:15,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:15,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:02:15,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:15,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:02:15,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:02:15,380 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 01:02:15,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 248 transitions, 3277 flow. Second operand has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:15,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:15,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 01:02:15,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:16,723 INFO L124 PetriNetUnfolderBase]: 5651/9331 cut-off events. [2024-06-28 01:02:16,723 INFO L125 PetriNetUnfolderBase]: For 296732/296732 co-relation queries the response was YES. [2024-06-28 01:02:16,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53453 conditions, 9331 events. 5651/9331 cut-off events. For 296732/296732 co-relation queries the response was YES. Maximal size of possible extension queue 616. Compared 69424 event pairs, 1575 based on Foata normal form. 50/9353 useless extension candidates. Maximal degree in co-relation 53370. Up to 7039 conditions per place. [2024-06-28 01:02:16,803 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 172 selfloop transitions, 115 changer transitions 0/301 dead transitions. [2024-06-28 01:02:16,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 301 transitions, 4328 flow [2024-06-28 01:02:16,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 01:02:16,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 01:02:16,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 259 transitions. [2024-06-28 01:02:16,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7038043478260869 [2024-06-28 01:02:16,804 INFO L175 Difference]: Start difference. First operand has 190 places, 248 transitions, 3277 flow. Second operand 8 states and 259 transitions. [2024-06-28 01:02:16,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 301 transitions, 4328 flow [2024-06-28 01:02:17,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 301 transitions, 4112 flow, removed 35 selfloop flow, removed 4 redundant places. [2024-06-28 01:02:17,359 INFO L231 Difference]: Finished difference. Result has 194 places, 250 transitions, 3383 flow [2024-06-28 01:02:17,359 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3063, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3383, PETRI_PLACES=194, PETRI_TRANSITIONS=250} [2024-06-28 01:02:17,359 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 144 predicate places. [2024-06-28 01:02:17,359 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 250 transitions, 3383 flow [2024-06-28 01:02:17,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:17,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:17,360 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:17,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-28 01:02:17,360 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:02:17,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:17,361 INFO L85 PathProgramCache]: Analyzing trace with hash -1924030641, now seen corresponding path program 1 times [2024-06-28 01:02:17,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:17,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832182537] [2024-06-28 01:02:17,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:17,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:17,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:17,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:17,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:17,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832182537] [2024-06-28 01:02:17,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832182537] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:17,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:17,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:02:17,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228576459] [2024-06-28 01:02:17,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:17,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:02:17,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:17,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:02:17,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:02:17,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 01:02:17,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 250 transitions, 3383 flow. Second operand has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:17,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:17,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 01:02:17,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:18,850 INFO L124 PetriNetUnfolderBase]: 5953/9919 cut-off events. [2024-06-28 01:02:18,851 INFO L125 PetriNetUnfolderBase]: For 306451/306451 co-relation queries the response was YES. [2024-06-28 01:02:19,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56083 conditions, 9919 events. 5953/9919 cut-off events. For 306451/306451 co-relation queries the response was YES. Maximal size of possible extension queue 660. Compared 75519 event pairs, 1504 based on Foata normal form. 42/9919 useless extension candidates. Maximal degree in co-relation 55998. Up to 5775 conditions per place. [2024-06-28 01:02:19,110 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 172 selfloop transitions, 123 changer transitions 0/309 dead transitions. [2024-06-28 01:02:19,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 309 transitions, 4491 flow [2024-06-28 01:02:19,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 01:02:19,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 01:02:19,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 263 transitions. [2024-06-28 01:02:19,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7146739130434783 [2024-06-28 01:02:19,113 INFO L175 Difference]: Start difference. First operand has 194 places, 250 transitions, 3383 flow. Second operand 8 states and 263 transitions. [2024-06-28 01:02:19,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 309 transitions, 4491 flow [2024-06-28 01:02:19,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 309 transitions, 4208 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-28 01:02:19,784 INFO L231 Difference]: Finished difference. Result has 196 places, 252 transitions, 3437 flow [2024-06-28 01:02:19,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3100, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3437, PETRI_PLACES=196, PETRI_TRANSITIONS=252} [2024-06-28 01:02:19,784 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 146 predicate places. [2024-06-28 01:02:19,785 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 252 transitions, 3437 flow [2024-06-28 01:02:19,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:19,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:19,785 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:19,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-28 01:02:19,785 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:02:19,786 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:19,786 INFO L85 PathProgramCache]: Analyzing trace with hash 277552685, now seen corresponding path program 1 times [2024-06-28 01:02:19,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:19,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017033686] [2024-06-28 01:02:19,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:19,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:19,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:19,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:19,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:19,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017033686] [2024-06-28 01:02:19,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017033686] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:19,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:19,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 01:02:19,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689926316] [2024-06-28 01:02:19,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:19,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 01:02:19,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:19,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 01:02:19,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 01:02:19,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 01:02:19,883 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 252 transitions, 3437 flow. Second operand has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:19,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:19,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 01:02:19,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:21,172 INFO L124 PetriNetUnfolderBase]: 5947/9958 cut-off events. [2024-06-28 01:02:21,172 INFO L125 PetriNetUnfolderBase]: For 261079/261079 co-relation queries the response was YES. [2024-06-28 01:02:21,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55679 conditions, 9958 events. 5947/9958 cut-off events. For 261079/261079 co-relation queries the response was YES. Maximal size of possible extension queue 663. Compared 76158 event pairs, 1998 based on Foata normal form. 2/9929 useless extension candidates. Maximal degree in co-relation 55593. Up to 8607 conditions per place. [2024-06-28 01:02:21,259 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 204 selfloop transitions, 64 changer transitions 0/282 dead transitions. [2024-06-28 01:02:21,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 282 transitions, 4313 flow [2024-06-28 01:02:21,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 01:02:21,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 01:02:21,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 189 transitions. [2024-06-28 01:02:21,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6847826086956522 [2024-06-28 01:02:21,261 INFO L175 Difference]: Start difference. First operand has 196 places, 252 transitions, 3437 flow. Second operand 6 states and 189 transitions. [2024-06-28 01:02:21,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 282 transitions, 4313 flow [2024-06-28 01:02:21,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 282 transitions, 4002 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-28 01:02:21,967 INFO L231 Difference]: Finished difference. Result has 196 places, 252 transitions, 3262 flow [2024-06-28 01:02:21,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3126, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3262, PETRI_PLACES=196, PETRI_TRANSITIONS=252} [2024-06-28 01:02:21,967 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 146 predicate places. [2024-06-28 01:02:21,967 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 252 transitions, 3262 flow [2024-06-28 01:02:21,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:21,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:21,968 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:21,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-28 01:02:21,968 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:02:21,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:21,968 INFO L85 PathProgramCache]: Analyzing trace with hash 283266605, now seen corresponding path program 2 times [2024-06-28 01:02:21,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:21,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28319887] [2024-06-28 01:02:21,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:21,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:21,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:22,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:22,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:22,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28319887] [2024-06-28 01:02:22,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28319887] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:22,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:22,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 01:02:22,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253371033] [2024-06-28 01:02:22,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:22,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 01:02:22,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:22,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 01:02:22,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 01:02:22,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 01:02:22,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 252 transitions, 3262 flow. Second operand has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:22,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:22,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 01:02:22,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:23,454 INFO L124 PetriNetUnfolderBase]: 5986/10229 cut-off events. [2024-06-28 01:02:23,454 INFO L125 PetriNetUnfolderBase]: For 263971/263971 co-relation queries the response was YES. [2024-06-28 01:02:23,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55012 conditions, 10229 events. 5986/10229 cut-off events. For 263971/263971 co-relation queries the response was YES. Maximal size of possible extension queue 668. Compared 79519 event pairs, 2201 based on Foata normal form. 1/10199 useless extension candidates. Maximal degree in co-relation 54925. Up to 8626 conditions per place. [2024-06-28 01:02:23,536 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 199 selfloop transitions, 74 changer transitions 0/287 dead transitions. [2024-06-28 01:02:23,536 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 287 transitions, 4270 flow [2024-06-28 01:02:23,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 01:02:23,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 01:02:23,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 184 transitions. [2024-06-28 01:02:23,537 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-28 01:02:23,537 INFO L175 Difference]: Start difference. First operand has 196 places, 252 transitions, 3262 flow. Second operand 6 states and 184 transitions. [2024-06-28 01:02:23,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 287 transitions, 4270 flow [2024-06-28 01:02:24,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 287 transitions, 4150 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-06-28 01:02:24,039 INFO L231 Difference]: Finished difference. Result has 200 places, 260 transitions, 3441 flow [2024-06-28 01:02:24,039 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3152, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3441, PETRI_PLACES=200, PETRI_TRANSITIONS=260} [2024-06-28 01:02:24,039 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 150 predicate places. [2024-06-28 01:02:24,039 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 260 transitions, 3441 flow [2024-06-28 01:02:24,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:24,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:24,039 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:24,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-28 01:02:24,040 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:02:24,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:24,040 INFO L85 PathProgramCache]: Analyzing trace with hash 1924240095, now seen corresponding path program 7 times [2024-06-28 01:02:24,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:24,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504034722] [2024-06-28 01:02:24,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:24,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:24,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:24,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:24,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:24,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504034722] [2024-06-28 01:02:24,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504034722] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:24,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:24,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:02:24,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912498487] [2024-06-28 01:02:24,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:24,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:02:24,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:24,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:02:24,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:02:24,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 01:02:24,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 260 transitions, 3441 flow. Second operand has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:24,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:24,272 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 01:02:24,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:25,759 INFO L124 PetriNetUnfolderBase]: 6357/10475 cut-off events. [2024-06-28 01:02:25,760 INFO L125 PetriNetUnfolderBase]: For 337866/337866 co-relation queries the response was YES. [2024-06-28 01:02:25,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58205 conditions, 10475 events. 6357/10475 cut-off events. For 337866/337866 co-relation queries the response was YES. Maximal size of possible extension queue 703. Compared 79734 event pairs, 1815 based on Foata normal form. 50/10512 useless extension candidates. Maximal degree in co-relation 58116. Up to 8134 conditions per place. [2024-06-28 01:02:26,038 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 191 selfloop transitions, 104 changer transitions 0/309 dead transitions. [2024-06-28 01:02:26,039 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 309 transitions, 4433 flow [2024-06-28 01:02:26,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 01:02:26,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 01:02:26,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 253 transitions. [2024-06-28 01:02:26,040 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6875 [2024-06-28 01:02:26,040 INFO L175 Difference]: Start difference. First operand has 200 places, 260 transitions, 3441 flow. Second operand 8 states and 253 transitions. [2024-06-28 01:02:26,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 309 transitions, 4433 flow [2024-06-28 01:02:26,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 309 transitions, 4389 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-06-28 01:02:26,690 INFO L231 Difference]: Finished difference. Result has 207 places, 262 transitions, 3702 flow [2024-06-28 01:02:26,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3397, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3702, PETRI_PLACES=207, PETRI_TRANSITIONS=262} [2024-06-28 01:02:26,691 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 157 predicate places. [2024-06-28 01:02:26,691 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 262 transitions, 3702 flow [2024-06-28 01:02:26,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:26,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:26,691 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:26,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-28 01:02:26,691 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:02:26,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:26,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1437764049, now seen corresponding path program 8 times [2024-06-28 01:02:26,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:26,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733109131] [2024-06-28 01:02:26,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:26,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:26,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:26,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:26,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:26,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733109131] [2024-06-28 01:02:26,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733109131] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:26,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:26,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:02:26,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474598825] [2024-06-28 01:02:26,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:26,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:02:26,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:26,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:02:26,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:02:26,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 01:02:26,800 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 262 transitions, 3702 flow. Second operand has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:26,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:26,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 01:02:26,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:28,547 INFO L124 PetriNetUnfolderBase]: 6728/11114 cut-off events. [2024-06-28 01:02:28,547 INFO L125 PetriNetUnfolderBase]: For 373572/373572 co-relation queries the response was YES. [2024-06-28 01:02:28,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62475 conditions, 11114 events. 6728/11114 cut-off events. For 373572/373572 co-relation queries the response was YES. Maximal size of possible extension queue 754. Compared 85750 event pairs, 2003 based on Foata normal form. 50/11138 useless extension candidates. Maximal degree in co-relation 62384. Up to 8731 conditions per place. [2024-06-28 01:02:28,640 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 195 selfloop transitions, 103 changer transitions 0/312 dead transitions. [2024-06-28 01:02:28,640 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 312 transitions, 4806 flow [2024-06-28 01:02:28,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 01:02:28,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 01:02:28,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 253 transitions. [2024-06-28 01:02:28,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6875 [2024-06-28 01:02:28,641 INFO L175 Difference]: Start difference. First operand has 207 places, 262 transitions, 3702 flow. Second operand 8 states and 253 transitions. [2024-06-28 01:02:28,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 312 transitions, 4806 flow [2024-06-28 01:02:29,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 312 transitions, 4535 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-28 01:02:29,368 INFO L231 Difference]: Finished difference. Result has 209 places, 264 transitions, 3738 flow [2024-06-28 01:02:29,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3431, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3738, PETRI_PLACES=209, PETRI_TRANSITIONS=264} [2024-06-28 01:02:29,368 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 159 predicate places. [2024-06-28 01:02:29,369 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 264 transitions, 3738 flow [2024-06-28 01:02:29,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:29,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:29,369 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:29,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-28 01:02:29,369 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:02:29,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:29,369 INFO L85 PathProgramCache]: Analyzing trace with hash -974047219, now seen corresponding path program 9 times [2024-06-28 01:02:29,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:29,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591758069] [2024-06-28 01:02:29,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:29,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:29,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:29,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:29,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:29,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591758069] [2024-06-28 01:02:29,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591758069] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:29,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:29,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:02:29,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189079528] [2024-06-28 01:02:29,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:29,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:02:29,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:29,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:02:29,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:02:29,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 01:02:29,508 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 264 transitions, 3738 flow. Second operand has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:29,508 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:29,508 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 01:02:29,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:31,462 INFO L124 PetriNetUnfolderBase]: 7089/11665 cut-off events. [2024-06-28 01:02:31,462 INFO L125 PetriNetUnfolderBase]: For 390343/390343 co-relation queries the response was YES. [2024-06-28 01:02:31,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64927 conditions, 11665 events. 7089/11665 cut-off events. For 390343/390343 co-relation queries the response was YES. Maximal size of possible extension queue 795. Compared 90378 event pairs, 2047 based on Foata normal form. 50/11702 useless extension candidates. Maximal degree in co-relation 64835. Up to 9322 conditions per place. [2024-06-28 01:02:31,563 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 186 selfloop transitions, 113 changer transitions 0/313 dead transitions. [2024-06-28 01:02:31,564 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 313 transitions, 4754 flow [2024-06-28 01:02:31,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 01:02:31,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 01:02:31,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 252 transitions. [2024-06-28 01:02:31,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6847826086956522 [2024-06-28 01:02:31,565 INFO L175 Difference]: Start difference. First operand has 209 places, 264 transitions, 3738 flow. Second operand 8 states and 252 transitions. [2024-06-28 01:02:31,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 313 transitions, 4754 flow [2024-06-28 01:02:32,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 313 transitions, 4481 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-28 01:02:32,223 INFO L231 Difference]: Finished difference. Result has 211 places, 266 transitions, 3796 flow [2024-06-28 01:02:32,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3465, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3796, PETRI_PLACES=211, PETRI_TRANSITIONS=266} [2024-06-28 01:02:32,224 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 161 predicate places. [2024-06-28 01:02:32,224 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 266 transitions, 3796 flow [2024-06-28 01:02:32,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:32,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:32,224 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:32,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-28 01:02:32,225 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:02:32,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:32,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1437616179, now seen corresponding path program 10 times [2024-06-28 01:02:32,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:32,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268914197] [2024-06-28 01:02:32,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:32,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:32,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:32,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:32,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:32,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268914197] [2024-06-28 01:02:32,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268914197] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:32,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:32,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:02:32,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622060947] [2024-06-28 01:02:32,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:32,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:02:32,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:32,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:02:32,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:02:32,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 01:02:32,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 266 transitions, 3796 flow. Second operand has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:32,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:32,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 01:02:32,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:34,169 INFO L124 PetriNetUnfolderBase]: 7726/12779 cut-off events. [2024-06-28 01:02:34,169 INFO L125 PetriNetUnfolderBase]: For 443219/443219 co-relation queries the response was YES. [2024-06-28 01:02:34,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70841 conditions, 12779 events. 7726/12779 cut-off events. For 443219/443219 co-relation queries the response was YES. Maximal size of possible extension queue 887. Compared 101241 event pairs, 2251 based on Foata normal form. 42/12795 useless extension candidates. Maximal degree in co-relation 70748. Up to 7971 conditions per place. [2024-06-28 01:02:34,283 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 205 selfloop transitions, 106 changer transitions 0/325 dead transitions. [2024-06-28 01:02:34,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 325 transitions, 5140 flow [2024-06-28 01:02:34,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 01:02:34,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 01:02:34,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 258 transitions. [2024-06-28 01:02:34,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7010869565217391 [2024-06-28 01:02:34,284 INFO L175 Difference]: Start difference. First operand has 211 places, 266 transitions, 3796 flow. Second operand 8 states and 258 transitions. [2024-06-28 01:02:34,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 325 transitions, 5140 flow [2024-06-28 01:02:35,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 325 transitions, 4843 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-28 01:02:35,309 INFO L231 Difference]: Finished difference. Result has 214 places, 270 transitions, 3899 flow [2024-06-28 01:02:35,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3499, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3899, PETRI_PLACES=214, PETRI_TRANSITIONS=270} [2024-06-28 01:02:35,310 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 164 predicate places. [2024-06-28 01:02:35,310 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 270 transitions, 3899 flow [2024-06-28 01:02:35,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:35,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:35,310 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:35,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-28 01:02:35,311 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:02:35,311 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:35,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1644690351, now seen corresponding path program 2 times [2024-06-28 01:02:35,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:35,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937454304] [2024-06-28 01:02:35,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:35,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:35,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:35,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:35,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:35,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937454304] [2024-06-28 01:02:35,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937454304] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:35,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:35,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:02:35,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362410400] [2024-06-28 01:02:35,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:35,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:02:35,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:35,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:02:35,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:02:35,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 01:02:35,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 270 transitions, 3899 flow. Second operand has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:35,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:35,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 01:02:35,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:37,606 INFO L124 PetriNetUnfolderBase]: 8028/13284 cut-off events. [2024-06-28 01:02:37,607 INFO L125 PetriNetUnfolderBase]: For 459387/459387 co-relation queries the response was YES. [2024-06-28 01:02:37,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73247 conditions, 13284 events. 8028/13284 cut-off events. For 459387/459387 co-relation queries the response was YES. Maximal size of possible extension queue 919. Compared 106098 event pairs, 2334 based on Foata normal form. 42/13313 useless extension candidates. Maximal degree in co-relation 73152. Up to 9621 conditions per place. [2024-06-28 01:02:37,712 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 201 selfloop transitions, 110 changer transitions 0/325 dead transitions. [2024-06-28 01:02:37,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 325 transitions, 4989 flow [2024-06-28 01:02:37,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 01:02:37,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 01:02:37,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 257 transitions. [2024-06-28 01:02:37,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6983695652173914 [2024-06-28 01:02:37,714 INFO L175 Difference]: Start difference. First operand has 214 places, 270 transitions, 3899 flow. Second operand 8 states and 257 transitions. [2024-06-28 01:02:37,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 325 transitions, 4989 flow [2024-06-28 01:02:38,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 325 transitions, 4760 flow, removed 49 selfloop flow, removed 4 redundant places. [2024-06-28 01:02:38,629 INFO L231 Difference]: Finished difference. Result has 218 places, 272 transitions, 4001 flow [2024-06-28 01:02:38,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3670, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4001, PETRI_PLACES=218, PETRI_TRANSITIONS=272} [2024-06-28 01:02:38,630 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 168 predicate places. [2024-06-28 01:02:38,630 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 272 transitions, 4001 flow [2024-06-28 01:02:38,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:38,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:38,630 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:38,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-28 01:02:38,630 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:02:38,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:38,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1550203819, now seen corresponding path program 3 times [2024-06-28 01:02:38,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:38,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786912077] [2024-06-28 01:02:38,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:38,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:38,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:38,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:38,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:38,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786912077] [2024-06-28 01:02:38,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786912077] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:38,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:38,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:02:38,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656931285] [2024-06-28 01:02:38,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:38,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:02:38,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:38,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:02:38,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:02:38,732 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 01:02:38,733 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 272 transitions, 4001 flow. Second operand has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:38,733 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:38,733 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 01:02:38,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:40,841 INFO L124 PetriNetUnfolderBase]: 8323/13795 cut-off events. [2024-06-28 01:02:40,841 INFO L125 PetriNetUnfolderBase]: For 473275/473275 co-relation queries the response was YES. [2024-06-28 01:02:40,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75701 conditions, 13795 events. 8323/13795 cut-off events. For 473275/473275 co-relation queries the response was YES. Maximal size of possible extension queue 954. Compared 110951 event pairs, 2489 based on Foata normal form. 42/13824 useless extension candidates. Maximal degree in co-relation 75604. Up to 10689 conditions per place. [2024-06-28 01:02:40,980 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 196 selfloop transitions, 117 changer transitions 0/327 dead transitions. [2024-06-28 01:02:40,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 327 transitions, 5103 flow [2024-06-28 01:02:40,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 01:02:40,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 01:02:40,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 257 transitions. [2024-06-28 01:02:40,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6983695652173914 [2024-06-28 01:02:40,981 INFO L175 Difference]: Start difference. First operand has 218 places, 272 transitions, 4001 flow. Second operand 8 states and 257 transitions. [2024-06-28 01:02:40,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 327 transitions, 5103 flow [2024-06-28 01:02:42,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 327 transitions, 4802 flow, removed 42 selfloop flow, removed 6 redundant places. [2024-06-28 01:02:42,059 INFO L231 Difference]: Finished difference. Result has 220 places, 274 transitions, 4049 flow [2024-06-28 01:02:42,059 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3700, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4049, PETRI_PLACES=220, PETRI_TRANSITIONS=274} [2024-06-28 01:02:42,059 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 170 predicate places. [2024-06-28 01:02:42,059 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 274 transitions, 4049 flow [2024-06-28 01:02:42,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:42,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:42,059 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:42,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-28 01:02:42,060 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:02:42,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:42,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1236504589, now seen corresponding path program 4 times [2024-06-28 01:02:42,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:42,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287424626] [2024-06-28 01:02:42,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:42,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:42,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:42,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:42,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:42,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287424626] [2024-06-28 01:02:42,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287424626] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:42,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:42,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:02:42,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601233249] [2024-06-28 01:02:42,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:42,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:02:42,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:42,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:02:42,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:02:42,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 01:02:42,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 274 transitions, 4049 flow. Second operand has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:42,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:42,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 01:02:42,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:44,331 INFO L124 PetriNetUnfolderBase]: 8760/14615 cut-off events. [2024-06-28 01:02:44,331 INFO L125 PetriNetUnfolderBase]: For 508438/508438 co-relation queries the response was YES. [2024-06-28 01:02:44,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78400 conditions, 14615 events. 8760/14615 cut-off events. For 508438/508438 co-relation queries the response was YES. Maximal size of possible extension queue 1035. Compared 119268 event pairs, 2541 based on Foata normal form. 42/14633 useless extension candidates. Maximal degree in co-relation 78302. Up to 6273 conditions per place. [2024-06-28 01:02:44,468 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 192 selfloop transitions, 126 changer transitions 0/332 dead transitions. [2024-06-28 01:02:44,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 332 transitions, 5143 flow [2024-06-28 01:02:44,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 01:02:44,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 01:02:44,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 259 transitions. [2024-06-28 01:02:44,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7038043478260869 [2024-06-28 01:02:44,469 INFO L175 Difference]: Start difference. First operand has 220 places, 274 transitions, 4049 flow. Second operand 8 states and 259 transitions. [2024-06-28 01:02:44,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 332 transitions, 5143 flow [2024-06-28 01:02:45,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 332 transitions, 4824 flow, removed 44 selfloop flow, removed 6 redundant places. [2024-06-28 01:02:45,932 INFO L231 Difference]: Finished difference. Result has 221 places, 274 transitions, 3943 flow [2024-06-28 01:02:45,932 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3646, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3943, PETRI_PLACES=221, PETRI_TRANSITIONS=274} [2024-06-28 01:02:45,932 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 171 predicate places. [2024-06-28 01:02:45,932 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 274 transitions, 3943 flow [2024-06-28 01:02:45,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:45,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:45,932 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:45,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-28 01:02:45,933 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:02:45,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:45,933 INFO L85 PathProgramCache]: Analyzing trace with hash -692051853, now seen corresponding path program 3 times [2024-06-28 01:02:45,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:45,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413380059] [2024-06-28 01:02:45,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:45,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:45,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:45,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:45,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:45,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413380059] [2024-06-28 01:02:45,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413380059] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:45,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:45,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 01:02:45,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8909802] [2024-06-28 01:02:45,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:45,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 01:02:45,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:45,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 01:02:45,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 01:02:46,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 01:02:46,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 274 transitions, 3943 flow. Second operand has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:46,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:46,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 01:02:46,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:48,100 INFO L124 PetriNetUnfolderBase]: 8754/14555 cut-off events. [2024-06-28 01:02:48,100 INFO L125 PetriNetUnfolderBase]: For 445482/445482 co-relation queries the response was YES. [2024-06-28 01:02:48,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77790 conditions, 14555 events. 8754/14555 cut-off events. For 445482/445482 co-relation queries the response was YES. Maximal size of possible extension queue 1033. Compared 119052 event pairs, 2895 based on Foata normal form. 2/14548 useless extension candidates. Maximal degree in co-relation 77691. Up to 13081 conditions per place. [2024-06-28 01:02:48,252 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 221 selfloop transitions, 65 changer transitions 0/300 dead transitions. [2024-06-28 01:02:48,252 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 300 transitions, 4791 flow [2024-06-28 01:02:48,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 01:02:48,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 01:02:48,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 182 transitions. [2024-06-28 01:02:48,253 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6594202898550725 [2024-06-28 01:02:48,253 INFO L175 Difference]: Start difference. First operand has 221 places, 274 transitions, 3943 flow. Second operand 6 states and 182 transitions. [2024-06-28 01:02:48,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 300 transitions, 4791 flow [2024-06-28 01:02:49,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 300 transitions, 4381 flow, removed 48 selfloop flow, removed 7 redundant places. [2024-06-28 01:02:49,610 INFO L231 Difference]: Finished difference. Result has 220 places, 274 transitions, 3672 flow [2024-06-28 01:02:49,610 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3533, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3672, PETRI_PLACES=220, PETRI_TRANSITIONS=274} [2024-06-28 01:02:49,610 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 170 predicate places. [2024-06-28 01:02:49,610 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 274 transitions, 3672 flow [2024-06-28 01:02:49,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:49,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:49,611 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:49,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-28 01:02:49,611 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:02:49,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:49,611 INFO L85 PathProgramCache]: Analyzing trace with hash -896937073, now seen corresponding path program 4 times [2024-06-28 01:02:49,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:49,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346513444] [2024-06-28 01:02:49,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:49,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:49,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:49,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:49,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:49,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346513444] [2024-06-28 01:02:49,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346513444] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:49,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:49,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 01:02:49,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413750385] [2024-06-28 01:02:49,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:49,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 01:02:49,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:49,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 01:02:49,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 01:02:49,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 01:02:49,695 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 274 transitions, 3672 flow. Second operand has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:49,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:49,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 01:02:49,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:51,832 INFO L124 PetriNetUnfolderBase]: 8509/14650 cut-off events. [2024-06-28 01:02:51,832 INFO L125 PetriNetUnfolderBase]: For 397614/397614 co-relation queries the response was YES. [2024-06-28 01:02:51,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73025 conditions, 14650 events. 8509/14650 cut-off events. For 397614/397614 co-relation queries the response was YES. Maximal size of possible extension queue 1026. Compared 122885 event pairs, 3399 based on Foata normal form. 4/14637 useless extension candidates. Maximal degree in co-relation 72926. Up to 12709 conditions per place. [2024-06-28 01:02:51,956 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 219 selfloop transitions, 63 changer transitions 0/296 dead transitions. [2024-06-28 01:02:51,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 296 transitions, 4396 flow [2024-06-28 01:02:51,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 01:02:51,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 01:02:51,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 179 transitions. [2024-06-28 01:02:51,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6485507246376812 [2024-06-28 01:02:51,961 INFO L175 Difference]: Start difference. First operand has 220 places, 274 transitions, 3672 flow. Second operand 6 states and 179 transitions. [2024-06-28 01:02:51,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 296 transitions, 4396 flow [2024-06-28 01:02:52,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 296 transitions, 4297 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-28 01:02:52,656 INFO L231 Difference]: Finished difference. Result has 223 places, 274 transitions, 3708 flow [2024-06-28 01:02:52,656 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3573, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3708, PETRI_PLACES=223, PETRI_TRANSITIONS=274} [2024-06-28 01:02:52,656 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 173 predicate places. [2024-06-28 01:02:52,656 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 274 transitions, 3708 flow [2024-06-28 01:02:52,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:52,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:52,657 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:52,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-28 01:02:52,657 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:02:52,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:52,657 INFO L85 PathProgramCache]: Analyzing trace with hash -91971583, now seen corresponding path program 5 times [2024-06-28 01:02:52,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:52,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349624767] [2024-06-28 01:02:52,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:52,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:52,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:52,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:52,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:52,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349624767] [2024-06-28 01:02:52,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349624767] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:52,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:52,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 01:02:52,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719700277] [2024-06-28 01:02:52,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:52,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 01:02:52,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:52,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 01:02:52,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 01:02:52,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 01:02:52,741 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 274 transitions, 3708 flow. Second operand has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:52,741 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:52,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 01:02:52,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:54,954 INFO L124 PetriNetUnfolderBase]: 8418/14118 cut-off events. [2024-06-28 01:02:54,954 INFO L125 PetriNetUnfolderBase]: For 403046/403046 co-relation queries the response was YES. [2024-06-28 01:02:55,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72066 conditions, 14118 events. 8418/14118 cut-off events. For 403046/403046 co-relation queries the response was YES. Maximal size of possible extension queue 986. Compared 115457 event pairs, 3055 based on Foata normal form. 2/14091 useless extension candidates. Maximal degree in co-relation 71966. Up to 12544 conditions per place. [2024-06-28 01:02:55,067 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 206 selfloop transitions, 74 changer transitions 0/294 dead transitions. [2024-06-28 01:02:55,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 294 transitions, 4536 flow [2024-06-28 01:02:55,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 01:02:55,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 01:02:55,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 178 transitions. [2024-06-28 01:02:55,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.644927536231884 [2024-06-28 01:02:55,068 INFO L175 Difference]: Start difference. First operand has 223 places, 274 transitions, 3708 flow. Second operand 6 states and 178 transitions. [2024-06-28 01:02:55,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 294 transitions, 4536 flow [2024-06-28 01:02:56,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 294 transitions, 4372 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-28 01:02:56,142 INFO L231 Difference]: Finished difference. Result has 223 places, 274 transitions, 3699 flow [2024-06-28 01:02:56,142 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3544, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3699, PETRI_PLACES=223, PETRI_TRANSITIONS=274} [2024-06-28 01:02:56,143 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 173 predicate places. [2024-06-28 01:02:56,143 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 274 transitions, 3699 flow [2024-06-28 01:02:56,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:56,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:56,143 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:56,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-28 01:02:56,143 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:02:56,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:56,143 INFO L85 PathProgramCache]: Analyzing trace with hash -697635283, now seen corresponding path program 6 times [2024-06-28 01:02:56,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:56,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058254535] [2024-06-28 01:02:56,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:56,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:56,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:56,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:56,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:56,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058254535] [2024-06-28 01:02:56,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058254535] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:56,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:56,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 01:02:56,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476381039] [2024-06-28 01:02:56,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:56,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 01:02:56,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:56,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 01:02:56,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 01:02:56,224 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 01:02:56,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 274 transitions, 3699 flow. Second operand has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:56,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:56,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 01:02:56,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:58,262 INFO L124 PetriNetUnfolderBase]: 8325/13934 cut-off events. [2024-06-28 01:02:58,263 INFO L125 PetriNetUnfolderBase]: For 410252/410252 co-relation queries the response was YES. [2024-06-28 01:02:58,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71310 conditions, 13934 events. 8325/13934 cut-off events. For 410252/410252 co-relation queries the response was YES. Maximal size of possible extension queue 969. Compared 113314 event pairs, 3006 based on Foata normal form. 2/13906 useless extension candidates. Maximal degree in co-relation 71210. Up to 12377 conditions per place. [2024-06-28 01:02:58,367 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 209 selfloop transitions, 70 changer transitions 0/293 dead transitions. [2024-06-28 01:02:58,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 293 transitions, 4413 flow [2024-06-28 01:02:58,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 01:02:58,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 01:02:58,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 176 transitions. [2024-06-28 01:02:58,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6376811594202898 [2024-06-28 01:02:58,368 INFO L175 Difference]: Start difference. First operand has 223 places, 274 transitions, 3699 flow. Second operand 6 states and 176 transitions. [2024-06-28 01:02:58,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 293 transitions, 4413 flow [2024-06-28 01:02:59,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 293 transitions, 4155 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-28 01:02:59,235 INFO L231 Difference]: Finished difference. Result has 222 places, 274 transitions, 3590 flow [2024-06-28 01:02:59,236 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3441, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3590, PETRI_PLACES=222, PETRI_TRANSITIONS=274} [2024-06-28 01:02:59,236 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 172 predicate places. [2024-06-28 01:02:59,236 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 274 transitions, 3590 flow [2024-06-28 01:02:59,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:59,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:59,236 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:59,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-28 01:02:59,236 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:02:59,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:59,238 INFO L85 PathProgramCache]: Analyzing trace with hash -703347776, now seen corresponding path program 1 times [2024-06-28 01:02:59,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:59,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125236231] [2024-06-28 01:02:59,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:59,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:59,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:59,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:59,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:59,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125236231] [2024-06-28 01:02:59,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125236231] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:59,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:59,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 01:02:59,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363971560] [2024-06-28 01:02:59,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:59,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 01:02:59,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:59,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 01:02:59,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 01:02:59,328 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 01:02:59,328 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 274 transitions, 3590 flow. Second operand has 6 states, 6 states have (on average 20.333333333333332) internal successors, (122), 6 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:59,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:59,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 01:02:59,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand