./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/protection/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/protection/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 [2024-06-27 17:56:56,025 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 17:56:56,091 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 17:56:56,094 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 17:56:56,095 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 17:56:56,111 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 17:56:56,113 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 17:56:56,114 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 17:56:56,114 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 17:56:56,117 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 17:56:56,117 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 17:56:56,118 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 17:56:56,118 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 17:56:56,119 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 17:56:56,120 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 17:56:56,120 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 17:56:56,120 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 17:56:56,120 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 17:56:56,120 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 17:56:56,121 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 17:56:56,121 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 17:56:56,121 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 17:56:56,121 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 17:56:56,121 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 17:56:56,122 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 17:56:56,122 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 17:56:56,122 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 17:56:56,122 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 17:56:56,123 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 17:56:56,123 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 17:56:56,124 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 17:56:56,124 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 17:56:56,124 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 17:56:56,124 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 17:56:56,124 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 17:56:56,124 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 17:56:56,125 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 17:56:56,125 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 17:56:56,125 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 17:56:56,125 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 17:56:56,125 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 17:56:56,125 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 17:56:56,126 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 17:56:56,126 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-06-27 17:56:56,295 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 17:56:56,309 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 17:56:56,311 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 17:56:56,312 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 17:56:56,312 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 17:56:56,313 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/safe031_tso.yml/witness.yml [2024-06-27 17:56:56,414 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 17:56:56,415 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 17:56:56,415 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe031_tso.i [2024-06-27 17:56:57,394 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 17:56:57,545 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 17:56:57,546 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe031_tso.i [2024-06-27 17:56:57,563 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9e757c9ba/18ff98f3a2b24648859bb9881a3d3d47/FLAGb3a3ba5f9 [2024-06-27 17:56:57,575 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9e757c9ba/18ff98f3a2b24648859bb9881a3d3d47 [2024-06-27 17:56:57,576 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 17:56:57,577 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 17:56:57,577 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 17:56:57,577 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 17:56:57,581 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 17:56:57,582 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 05:56:56" (1/2) ... [2024-06-27 17:56:57,582 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2fbbca5f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:56:57, skipping insertion in model container [2024-06-27 17:56:57,582 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 05:56:56" (1/2) ... [2024-06-27 17:56:57,583 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@15b6280f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:56:57, skipping insertion in model container [2024-06-27 17:56:57,584 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 05:56:57" (2/2) ... [2024-06-27 17:56:57,584 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2fbbca5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:56:57, skipping insertion in model container [2024-06-27 17:56:57,584 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 05:56:57" (2/2) ... [2024-06-27 17:56:57,584 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 17:56:57,613 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 17:56:57,614 INFO L97 edCorrectnessWitness]: Location invariant before [L783-L783] ((((! multithreaded || ((z == 0 || z == 1) || z == 2)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || ((y == 0 || y == 1) || y == 2)) [2024-06-27 17:56:57,614 INFO L97 edCorrectnessWitness]: Location invariant before [L781-L781] ((((! multithreaded || ((z == 0 || z == 1) || z == 2)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || ((y == 0 || y == 1) || y == 2)) [2024-06-27 17:56:57,614 INFO L97 edCorrectnessWitness]: Location invariant before [L784-L784] ((((! multithreaded || ((z == 0 || z == 1) || z == 2)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || ((y == 0 || y == 1) || y == 2)) [2024-06-27 17:56:57,614 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 17:56:57,615 INFO L106 edCorrectnessWitness]: ghost_update [L779-L779] multithreaded = 1; [2024-06-27 17:56:57,651 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 17:56:57,810 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] [2024-06-27 17:56:57,934 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 17:56:57,942 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local [2024-06-27 17:56:57,976 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 [2024-06-27 17:56:58,010 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 17:56:58,042 INFO L206 MainTranslator]: Completed translation [2024-06-27 17:56:58,043 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:56:58 WrapperNode [2024-06-27 17:56:58,043 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 17:56:58,044 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 17:56:58,044 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 17:56:58,044 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 17:56:58,050 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:56:58" (1/1) ... [2024-06-27 17:56:58,076 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:56:58" (1/1) ... [2024-06-27 17:56:58,104 INFO L138 Inliner]: procedures = 175, calls = 43, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 63 [2024-06-27 17:56:58,104 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 17:56:58,105 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 17:56:58,105 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 17:56:58,105 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 17:56:58,113 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:56:58" (1/1) ... [2024-06-27 17:56:58,114 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:56:58" (1/1) ... [2024-06-27 17:56:58,117 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:56:58" (1/1) ... [2024-06-27 17:56:58,136 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-27 17:56:58,136 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:56:58" (1/1) ... [2024-06-27 17:56:58,136 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:56:58" (1/1) ... [2024-06-27 17:56:58,148 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:56:58" (1/1) ... [2024-06-27 17:56:58,150 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:56:58" (1/1) ... [2024-06-27 17:56:58,153 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:56:58" (1/1) ... [2024-06-27 17:56:58,154 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:56:58" (1/1) ... [2024-06-27 17:56:58,158 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 17:56:58,160 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 17:56:58,160 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 17:56:58,161 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 17:56:58,161 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:56:58" (1/1) ... [2024-06-27 17:56:58,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 17:56:58,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:56:58,187 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-27 17:56:58,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-27 17:56:58,214 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 17:56:58,214 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 17:56:58,214 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 17:56:58,215 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 17:56:58,215 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 17:56:58,215 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 17:56:58,215 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 17:56:58,215 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 17:56:58,216 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 17:56:58,216 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 17:56:58,216 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 17:56:58,216 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 17:56:58,218 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 17:56:58,336 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 17:56:58,339 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 17:56:58,453 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 17:56:58,454 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 17:56:58,507 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 17:56:58,507 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 17:56:58,508 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 05:56:58 BoogieIcfgContainer [2024-06-27 17:56:58,508 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 17:56:58,509 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 17:56:58,510 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 17:56:58,512 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 17:56:58,512 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 05:56:56" (1/4) ... [2024-06-27 17:56:58,513 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49f87291 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 05:56:58, skipping insertion in model container [2024-06-27 17:56:58,513 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 05:56:57" (2/4) ... [2024-06-27 17:56:58,513 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49f87291 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 05:56:58, skipping insertion in model container [2024-06-27 17:56:58,513 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:56:58" (3/4) ... [2024-06-27 17:56:58,513 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49f87291 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 05:56:58, skipping insertion in model container [2024-06-27 17:56:58,514 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 05:56:58" (4/4) ... [2024-06-27 17:56:58,514 INFO L112 eAbstractionObserver]: Analyzing ICFG safe031_tso.i [2024-06-27 17:56:58,527 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 17:56:58,527 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-27 17:56:58,527 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 17:56:58,561 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 17:56:58,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 55 places, 46 transitions, 104 flow [2024-06-27 17:56:58,632 INFO L124 PetriNetUnfolderBase]: 1/43 cut-off events. [2024-06-27 17:56:58,633 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 17:56:58,635 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. [2024-06-27 17:56:58,635 INFO L82 GeneralOperation]: Start removeDead. Operand has 55 places, 46 transitions, 104 flow [2024-06-27 17:56:58,638 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 50 places, 40 transitions, 89 flow [2024-06-27 17:56:58,646 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 17:56:58,651 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;@502dde7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 17:56:58,651 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-06-27 17:56:58,654 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 17:56:58,655 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 17:56:58,655 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 17:56:58,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:58,655 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 17:56:58,656 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:56:58,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:58,660 INFO L85 PathProgramCache]: Analyzing trace with hash 210328679, now seen corresponding path program 1 times [2024-06-27 17:56:58,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:58,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762440351] [2024-06-27 17:56:58,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:58,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:58,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:58,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:56:58,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:58,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762440351] [2024-06-27 17:56:58,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762440351] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:58,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:58,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 17:56:58,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387495047] [2024-06-27 17:56:58,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:58,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 17:56:58,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:58,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 17:56:58,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 17:56:58,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 46 [2024-06-27 17:56:58,949 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) [2024-06-27 17:56:58,949 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:58,949 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 46 [2024-06-27 17:56:58,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:59,178 INFO L124 PetriNetUnfolderBase]: 1206/1941 cut-off events. [2024-06-27 17:56:59,179 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2024-06-27 17:56:59,183 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. [2024-06-27 17:56:59,191 INFO L140 encePairwiseOnDemand]: 39/46 looper letters, 33 selfloop transitions, 4 changer transitions 0/52 dead transitions. [2024-06-27 17:56:59,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 52 transitions, 193 flow [2024-06-27 17:56:59,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 17:56:59,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 17:56:59,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 97 transitions. [2024-06-27 17:56:59,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7028985507246377 [2024-06-27 17:56:59,201 INFO L175 Difference]: Start difference. First operand has 50 places, 40 transitions, 89 flow. Second operand 3 states and 97 transitions. [2024-06-27 17:56:59,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 52 transitions, 193 flow [2024-06-27 17:56:59,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 52 transitions, 188 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 17:56:59,205 INFO L231 Difference]: Finished difference. Result has 50 places, 43 transitions, 116 flow [2024-06-27 17:56:59,206 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=116, PETRI_PLACES=50, PETRI_TRANSITIONS=43} [2024-06-27 17:56:59,209 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 0 predicate places. [2024-06-27 17:56:59,209 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 43 transitions, 116 flow [2024-06-27 17:56:59,209 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) [2024-06-27 17:56:59,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:59,209 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:59,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 17:56:59,210 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:56:59,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:59,210 INFO L85 PathProgramCache]: Analyzing trace with hash 263360036, now seen corresponding path program 1 times [2024-06-27 17:56:59,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:59,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026042343] [2024-06-27 17:56:59,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:59,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:59,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:59,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:56:59,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:59,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026042343] [2024-06-27 17:56:59,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026042343] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:59,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:59,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 17:56:59,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79165999] [2024-06-27 17:56:59,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:59,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 17:56:59,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:59,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 17:56:59,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 17:56:59,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 46 [2024-06-27 17:56:59,334 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) [2024-06-27 17:56:59,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:59,334 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 46 [2024-06-27 17:56:59,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:59,502 INFO L124 PetriNetUnfolderBase]: 1200/1936 cut-off events. [2024-06-27 17:56:59,503 INFO L125 PetriNetUnfolderBase]: For 352/352 co-relation queries the response was YES. [2024-06-27 17:56:59,505 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. [2024-06-27 17:56:59,513 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 42 selfloop transitions, 7 changer transitions 0/64 dead transitions. [2024-06-27 17:56:59,513 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 64 transitions, 268 flow [2024-06-27 17:56:59,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 17:56:59,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 17:56:59,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 128 transitions. [2024-06-27 17:56:59,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6956521739130435 [2024-06-27 17:56:59,517 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 116 flow. Second operand 4 states and 128 transitions. [2024-06-27 17:56:59,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 64 transitions, 268 flow [2024-06-27 17:56:59,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 64 transitions, 264 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 17:56:59,522 INFO L231 Difference]: Finished difference. Result has 53 places, 46 transitions, 152 flow [2024-06-27 17:56:59,522 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} [2024-06-27 17:56:59,523 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 3 predicate places. [2024-06-27 17:56:59,523 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 46 transitions, 152 flow [2024-06-27 17:56:59,523 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) [2024-06-27 17:56:59,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:59,526 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:59,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 17:56:59,527 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:56:59,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:59,532 INFO L85 PathProgramCache]: Analyzing trace with hash 479053769, now seen corresponding path program 1 times [2024-06-27 17:56:59,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:59,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139782758] [2024-06-27 17:56:59,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:59,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:59,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:59,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:56:59,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:59,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139782758] [2024-06-27 17:56:59,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139782758] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:59,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:59,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 17:56:59,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400069642] [2024-06-27 17:56:59,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:59,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 17:56:59,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:59,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 17:56:59,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 17:56:59,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:56:59,685 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) [2024-06-27 17:56:59,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:59,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:56:59,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:59,878 INFO L124 PetriNetUnfolderBase]: 1529/2415 cut-off events. [2024-06-27 17:56:59,878 INFO L125 PetriNetUnfolderBase]: For 1055/1055 co-relation queries the response was YES. [2024-06-27 17:56:59,882 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. [2024-06-27 17:56:59,891 INFO L140 encePairwiseOnDemand]: 39/46 looper letters, 43 selfloop transitions, 7 changer transitions 0/64 dead transitions. [2024-06-27 17:56:59,891 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 64 transitions, 300 flow [2024-06-27 17:56:59,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 17:56:59,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 17:56:59,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 121 transitions. [2024-06-27 17:56:59,894 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.657608695652174 [2024-06-27 17:56:59,894 INFO L175 Difference]: Start difference. First operand has 53 places, 46 transitions, 152 flow. Second operand 4 states and 121 transitions. [2024-06-27 17:56:59,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 64 transitions, 300 flow [2024-06-27 17:56:59,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 64 transitions, 286 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-27 17:56:59,898 INFO L231 Difference]: Finished difference. Result has 55 places, 49 transitions, 178 flow [2024-06-27 17:56:59,898 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} [2024-06-27 17:56:59,899 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 5 predicate places. [2024-06-27 17:56:59,899 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 49 transitions, 178 flow [2024-06-27 17:56:59,899 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) [2024-06-27 17:56:59,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:59,900 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:59,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 17:56:59,900 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:56:59,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:59,901 INFO L85 PathProgramCache]: Analyzing trace with hash 672983172, now seen corresponding path program 1 times [2024-06-27 17:56:59,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:59,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800715308] [2024-06-27 17:56:59,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:59,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:59,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:00,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:00,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:00,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800715308] [2024-06-27 17:57:00,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800715308] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:00,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:00,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:57:00,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026080926] [2024-06-27 17:57:00,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:00,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:57:00,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:00,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:57:00,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:57:00,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:57:00,107 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) [2024-06-27 17:57:00,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:00,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:57:00,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:00,317 INFO L124 PetriNetUnfolderBase]: 1520/2432 cut-off events. [2024-06-27 17:57:00,318 INFO L125 PetriNetUnfolderBase]: For 1854/1854 co-relation queries the response was YES. [2024-06-27 17:57:00,322 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. [2024-06-27 17:57:00,331 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 61 selfloop transitions, 12 changer transitions 0/87 dead transitions. [2024-06-27 17:57:00,332 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 87 transitions, 424 flow [2024-06-27 17:57:00,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:57:00,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:57:00,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 181 transitions. [2024-06-27 17:57:00,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6557971014492754 [2024-06-27 17:57:00,334 INFO L175 Difference]: Start difference. First operand has 55 places, 49 transitions, 178 flow. Second operand 6 states and 181 transitions. [2024-06-27 17:57:00,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 87 transitions, 424 flow [2024-06-27 17:57:00,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 87 transitions, 408 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-27 17:57:00,337 INFO L231 Difference]: Finished difference. Result has 59 places, 53 transitions, 221 flow [2024-06-27 17:57:00,338 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} [2024-06-27 17:57:00,339 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 9 predicate places. [2024-06-27 17:57:00,339 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 53 transitions, 221 flow [2024-06-27 17:57:00,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:00,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:00,339 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:00,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 17:57:00,340 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:00,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:00,341 INFO L85 PathProgramCache]: Analyzing trace with hash 1939848214, now seen corresponding path program 1 times [2024-06-27 17:57:00,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:00,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479984096] [2024-06-27 17:57:00,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:00,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:00,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:00,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:00,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:00,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479984096] [2024-06-27 17:57:00,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479984096] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:00,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:00,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:57:00,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270476151] [2024-06-27 17:57:00,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:00,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:57:00,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:00,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:57:00,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:57:00,454 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:57:00,454 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) [2024-06-27 17:57:00,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:00,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:57:00,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:00,606 INFO L124 PetriNetUnfolderBase]: 1528/2525 cut-off events. [2024-06-27 17:57:00,606 INFO L125 PetriNetUnfolderBase]: For 3108/3108 co-relation queries the response was YES. [2024-06-27 17:57:00,611 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. [2024-06-27 17:57:00,621 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 57 selfloop transitions, 16 changer transitions 0/87 dead transitions. [2024-06-27 17:57:00,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 87 transitions, 487 flow [2024-06-27 17:57:00,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:57:00,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:57:00,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 153 transitions. [2024-06-27 17:57:00,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6652173913043479 [2024-06-27 17:57:00,622 INFO L175 Difference]: Start difference. First operand has 59 places, 53 transitions, 221 flow. Second operand 5 states and 153 transitions. [2024-06-27 17:57:00,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 87 transitions, 487 flow [2024-06-27 17:57:00,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 87 transitions, 458 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-27 17:57:00,626 INFO L231 Difference]: Finished difference. Result has 63 places, 64 transitions, 311 flow [2024-06-27 17:57:00,626 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} [2024-06-27 17:57:00,626 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 13 predicate places. [2024-06-27 17:57:00,626 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 64 transitions, 311 flow [2024-06-27 17:57:00,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:00,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:00,627 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:00,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 17:57:00,627 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:00,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:00,628 INFO L85 PathProgramCache]: Analyzing trace with hash -1457380792, now seen corresponding path program 1 times [2024-06-27 17:57:00,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:00,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513923571] [2024-06-27 17:57:00,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:00,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:00,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:00,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:00,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:00,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513923571] [2024-06-27 17:57:00,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513923571] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:00,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:00,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:57:00,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565341605] [2024-06-27 17:57:00,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:00,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:57:00,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:00,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:57:00,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:57:00,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:57:00,706 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) [2024-06-27 17:57:00,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:00,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:57:00,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:00,870 INFO L124 PetriNetUnfolderBase]: 1545/2492 cut-off events. [2024-06-27 17:57:00,871 INFO L125 PetriNetUnfolderBase]: For 4917/4923 co-relation queries the response was YES. [2024-06-27 17:57:00,875 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. [2024-06-27 17:57:00,885 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 67 selfloop transitions, 15 changer transitions 0/96 dead transitions. [2024-06-27 17:57:00,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 96 transitions, 601 flow [2024-06-27 17:57:00,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:57:00,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:57:00,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 154 transitions. [2024-06-27 17:57:00,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6695652173913044 [2024-06-27 17:57:00,886 INFO L175 Difference]: Start difference. First operand has 63 places, 64 transitions, 311 flow. Second operand 5 states and 154 transitions. [2024-06-27 17:57:00,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 96 transitions, 601 flow [2024-06-27 17:57:00,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 96 transitions, 589 flow, removed 6 selfloop flow, removed 0 redundant places. [2024-06-27 17:57:00,891 INFO L231 Difference]: Finished difference. Result has 68 places, 70 transitions, 387 flow [2024-06-27 17:57:00,891 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} [2024-06-27 17:57:00,892 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 18 predicate places. [2024-06-27 17:57:00,892 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 70 transitions, 387 flow [2024-06-27 17:57:00,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:00,892 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:00,892 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:00,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 17:57:00,893 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:00,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:00,893 INFO L85 PathProgramCache]: Analyzing trace with hash 836654456, now seen corresponding path program 2 times [2024-06-27 17:57:00,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:00,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219013923] [2024-06-27 17:57:00,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:00,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:00,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:00,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:00,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:00,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219013923] [2024-06-27 17:57:00,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219013923] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:00,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:00,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:57:00,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928984479] [2024-06-27 17:57:00,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:00,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:57:00,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:00,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:57:00,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:57:00,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:57:00,980 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) [2024-06-27 17:57:00,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:00,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:57:00,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:01,169 INFO L124 PetriNetUnfolderBase]: 1540/2477 cut-off events. [2024-06-27 17:57:01,169 INFO L125 PetriNetUnfolderBase]: For 6425/6425 co-relation queries the response was YES. [2024-06-27 17:57:01,174 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. [2024-06-27 17:57:01,182 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 62 selfloop transitions, 15 changer transitions 0/91 dead transitions. [2024-06-27 17:57:01,183 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 91 transitions, 591 flow [2024-06-27 17:57:01,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:57:01,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:57:01,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 149 transitions. [2024-06-27 17:57:01,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6478260869565218 [2024-06-27 17:57:01,184 INFO L175 Difference]: Start difference. First operand has 68 places, 70 transitions, 387 flow. Second operand 5 states and 149 transitions. [2024-06-27 17:57:01,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 91 transitions, 591 flow [2024-06-27 17:57:01,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 91 transitions, 555 flow, removed 15 selfloop flow, removed 1 redundant places. [2024-06-27 17:57:01,191 INFO L231 Difference]: Finished difference. Result has 72 places, 70 transitions, 389 flow [2024-06-27 17:57:01,191 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} [2024-06-27 17:57:01,192 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 22 predicate places. [2024-06-27 17:57:01,192 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 70 transitions, 389 flow [2024-06-27 17:57:01,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:01,192 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:01,192 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:01,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 17:57:01,193 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:01,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:01,193 INFO L85 PathProgramCache]: Analyzing trace with hash -1199000425, now seen corresponding path program 1 times [2024-06-27 17:57:01,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:01,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187515578] [2024-06-27 17:57:01,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:01,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:01,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:01,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:01,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:01,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187515578] [2024-06-27 17:57:01,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187515578] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:01,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:01,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:57:01,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207758587] [2024-06-27 17:57:01,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:01,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:57:01,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:01,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:57:01,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:57:01,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:57:01,282 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) [2024-06-27 17:57:01,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:01,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:57:01,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:01,512 INFO L124 PetriNetUnfolderBase]: 1667/2699 cut-off events. [2024-06-27 17:57:01,513 INFO L125 PetriNetUnfolderBase]: For 7383/7383 co-relation queries the response was YES. [2024-06-27 17:57:01,518 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. [2024-06-27 17:57:01,531 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 81 selfloop transitions, 32 changer transitions 0/127 dead transitions. [2024-06-27 17:57:01,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 127 transitions, 883 flow [2024-06-27 17:57:01,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:57:01,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:57:01,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 195 transitions. [2024-06-27 17:57:01,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7065217391304348 [2024-06-27 17:57:01,534 INFO L175 Difference]: Start difference. First operand has 72 places, 70 transitions, 389 flow. Second operand 6 states and 195 transitions. [2024-06-27 17:57:01,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 127 transitions, 883 flow [2024-06-27 17:57:01,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 127 transitions, 841 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-27 17:57:01,544 INFO L231 Difference]: Finished difference. Result has 76 places, 89 transitions, 569 flow [2024-06-27 17:57:01,544 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} [2024-06-27 17:57:01,546 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 26 predicate places. [2024-06-27 17:57:01,546 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 89 transitions, 569 flow [2024-06-27 17:57:01,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:01,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:01,546 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:01,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 17:57:01,547 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:01,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:01,547 INFO L85 PathProgramCache]: Analyzing trace with hash 146831173, now seen corresponding path program 2 times [2024-06-27 17:57:01,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:01,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232270992] [2024-06-27 17:57:01,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:01,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:01,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:01,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:01,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:01,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232270992] [2024-06-27 17:57:01,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232270992] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:01,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:01,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:57:01,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051352141] [2024-06-27 17:57:01,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:01,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:57:01,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:01,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:57:01,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:57:01,641 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:57:01,641 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) [2024-06-27 17:57:01,641 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:01,641 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:57:01,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:01,874 INFO L124 PetriNetUnfolderBase]: 1766/2911 cut-off events. [2024-06-27 17:57:01,874 INFO L125 PetriNetUnfolderBase]: For 11307/11307 co-relation queries the response was YES. [2024-06-27 17:57:01,881 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. [2024-06-27 17:57:01,891 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 79 selfloop transitions, 49 changer transitions 0/142 dead transitions. [2024-06-27 17:57:01,891 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 142 transitions, 1144 flow [2024-06-27 17:57:01,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:57:01,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:57:01,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 190 transitions. [2024-06-27 17:57:01,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6884057971014492 [2024-06-27 17:57:01,893 INFO L175 Difference]: Start difference. First operand has 76 places, 89 transitions, 569 flow. Second operand 6 states and 190 transitions. [2024-06-27 17:57:01,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 142 transitions, 1144 flow [2024-06-27 17:57:01,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 142 transitions, 1104 flow, removed 20 selfloop flow, removed 0 redundant places. [2024-06-27 17:57:01,907 INFO L231 Difference]: Finished difference. Result has 85 places, 108 transitions, 867 flow [2024-06-27 17:57:01,907 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} [2024-06-27 17:57:01,907 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 35 predicate places. [2024-06-27 17:57:01,908 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 108 transitions, 867 flow [2024-06-27 17:57:01,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:01,908 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:01,908 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:01,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 17:57:01,908 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:01,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:01,909 INFO L85 PathProgramCache]: Analyzing trace with hash 178097239, now seen corresponding path program 3 times [2024-06-27 17:57:01,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:01,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316002757] [2024-06-27 17:57:01,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:01,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:01,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:01,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:01,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:01,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316002757] [2024-06-27 17:57:01,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316002757] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:01,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:01,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:57:01,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612210540] [2024-06-27 17:57:01,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:01,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:57:01,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:01,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:57:01,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:57:02,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:57:02,016 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) [2024-06-27 17:57:02,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:02,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:57:02,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:02,260 INFO L124 PetriNetUnfolderBase]: 1759/2837 cut-off events. [2024-06-27 17:57:02,260 INFO L125 PetriNetUnfolderBase]: For 14515/14515 co-relation queries the response was YES. [2024-06-27 17:57:02,269 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. [2024-06-27 17:57:02,280 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 81 selfloop transitions, 47 changer transitions 0/142 dead transitions. [2024-06-27 17:57:02,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 142 transitions, 1291 flow [2024-06-27 17:57:02,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:57:02,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:57:02,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 189 transitions. [2024-06-27 17:57:02,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6847826086956522 [2024-06-27 17:57:02,281 INFO L175 Difference]: Start difference. First operand has 85 places, 108 transitions, 867 flow. Second operand 6 states and 189 transitions. [2024-06-27 17:57:02,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 142 transitions, 1291 flow [2024-06-27 17:57:02,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 142 transitions, 1263 flow, removed 14 selfloop flow, removed 0 redundant places. [2024-06-27 17:57:02,303 INFO L231 Difference]: Finished difference. Result has 93 places, 112 transitions, 1039 flow [2024-06-27 17:57:02,304 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} [2024-06-27 17:57:02,304 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 43 predicate places. [2024-06-27 17:57:02,304 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 112 transitions, 1039 flow [2024-06-27 17:57:02,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:02,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:02,305 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:02,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 17:57:02,305 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:02,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:02,305 INFO L85 PathProgramCache]: Analyzing trace with hash 178374069, now seen corresponding path program 1 times [2024-06-27 17:57:02,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:02,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154541895] [2024-06-27 17:57:02,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:02,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:02,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:02,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:02,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:02,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154541895] [2024-06-27 17:57:02,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154541895] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:02,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:02,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:57:02,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876733124] [2024-06-27 17:57:02,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:02,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:57:02,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:02,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:57:02,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:57:02,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:57:02,409 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) [2024-06-27 17:57:02,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:02,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:57:02,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:02,667 INFO L124 PetriNetUnfolderBase]: 1772/2906 cut-off events. [2024-06-27 17:57:02,667 INFO L125 PetriNetUnfolderBase]: For 16530/16530 co-relation queries the response was YES. [2024-06-27 17:57:02,677 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. [2024-06-27 17:57:02,689 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 112 selfloop transitions, 19 changer transitions 0/145 dead transitions. [2024-06-27 17:57:02,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 145 transitions, 1445 flow [2024-06-27 17:57:02,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:57:02,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:57:02,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 181 transitions. [2024-06-27 17:57:02,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6557971014492754 [2024-06-27 17:57:02,690 INFO L175 Difference]: Start difference. First operand has 93 places, 112 transitions, 1039 flow. Second operand 6 states and 181 transitions. [2024-06-27 17:57:02,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 145 transitions, 1445 flow [2024-06-27 17:57:02,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 145 transitions, 1385 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-27 17:57:02,713 INFO L231 Difference]: Finished difference. Result has 97 places, 115 transitions, 1065 flow [2024-06-27 17:57:02,714 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} [2024-06-27 17:57:02,714 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 47 predicate places. [2024-06-27 17:57:02,714 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 115 transitions, 1065 flow [2024-06-27 17:57:02,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:02,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:02,715 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:02,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 17:57:02,715 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)] === [2024-06-27 17:57:02,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:02,715 INFO L85 PathProgramCache]: Analyzing trace with hash -894635023, now seen corresponding path program 1 times [2024-06-27 17:57:02,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:02,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168287374] [2024-06-27 17:57:02,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:02,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:02,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:02,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:02,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:02,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168287374] [2024-06-27 17:57:02,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168287374] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:02,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:02,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 17:57:02,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612558634] [2024-06-27 17:57:02,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:02,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 17:57:02,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:02,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 17:57:02,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 17:57:02,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 46 [2024-06-27 17:57:02,792 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) [2024-06-27 17:57:02,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:02,792 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 46 [2024-06-27 17:57:02,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:03,014 INFO L124 PetriNetUnfolderBase]: 1715/2870 cut-off events. [2024-06-27 17:57:03,014 INFO L125 PetriNetUnfolderBase]: For 17689/17689 co-relation queries the response was YES. [2024-06-27 17:57:03,025 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. [2024-06-27 17:57:03,036 INFO L140 encePairwiseOnDemand]: 40/46 looper letters, 93 selfloop transitions, 7 changer transitions 0/127 dead transitions. [2024-06-27 17:57:03,037 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 127 transitions, 1293 flow [2024-06-27 17:57:03,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 17:57:03,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 17:57:03,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 119 transitions. [2024-06-27 17:57:03,038 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6467391304347826 [2024-06-27 17:57:03,038 INFO L175 Difference]: Start difference. First operand has 97 places, 115 transitions, 1065 flow. Second operand 4 states and 119 transitions. [2024-06-27 17:57:03,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 127 transitions, 1293 flow [2024-06-27 17:57:03,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 127 transitions, 1225 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-27 17:57:03,060 INFO L231 Difference]: Finished difference. Result has 97 places, 115 transitions, 1017 flow [2024-06-27 17:57:03,060 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} [2024-06-27 17:57:03,060 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 47 predicate places. [2024-06-27 17:57:03,061 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 115 transitions, 1017 flow [2024-06-27 17:57:03,061 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) [2024-06-27 17:57:03,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:03,061 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:03,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 17:57:03,061 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:03,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:03,062 INFO L85 PathProgramCache]: Analyzing trace with hash -885425341, now seen corresponding path program 1 times [2024-06-27 17:57:03,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:03,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231654378] [2024-06-27 17:57:03,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:03,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:03,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:03,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:03,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:03,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231654378] [2024-06-27 17:57:03,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231654378] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:03,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:03,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:57:03,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99259636] [2024-06-27 17:57:03,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:03,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:57:03,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:03,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:57:03,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:57:03,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:57:03,160 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) [2024-06-27 17:57:03,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:03,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:57:03,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:03,447 INFO L124 PetriNetUnfolderBase]: 1786/3066 cut-off events. [2024-06-27 17:57:03,447 INFO L125 PetriNetUnfolderBase]: For 18959/18959 co-relation queries the response was YES. [2024-06-27 17:57:03,456 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. [2024-06-27 17:57:03,467 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 124 selfloop transitions, 13 changer transitions 0/151 dead transitions. [2024-06-27 17:57:03,467 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 151 transitions, 1403 flow [2024-06-27 17:57:03,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:57:03,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:57:03,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 180 transitions. [2024-06-27 17:57:03,468 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6521739130434783 [2024-06-27 17:57:03,468 INFO L175 Difference]: Start difference. First operand has 97 places, 115 transitions, 1017 flow. Second operand 6 states and 180 transitions. [2024-06-27 17:57:03,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 151 transitions, 1403 flow [2024-06-27 17:57:03,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 151 transitions, 1383 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-27 17:57:03,490 INFO L231 Difference]: Finished difference. Result has 100 places, 118 transitions, 1069 flow [2024-06-27 17:57:03,490 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} [2024-06-27 17:57:03,490 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 50 predicate places. [2024-06-27 17:57:03,490 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 118 transitions, 1069 flow [2024-06-27 17:57:03,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:03,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:03,491 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:03,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 17:57:03,491 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:03,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:03,491 INFO L85 PathProgramCache]: Analyzing trace with hash -885247711, now seen corresponding path program 2 times [2024-06-27 17:57:03,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:03,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778993013] [2024-06-27 17:57:03,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:03,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:03,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:03,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:03,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:03,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778993013] [2024-06-27 17:57:03,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778993013] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:03,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:03,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:57:03,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300914341] [2024-06-27 17:57:03,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:03,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:57:03,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:03,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:57:03,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:57:03,577 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:57:03,578 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) [2024-06-27 17:57:03,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:03,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:57:03,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:03,833 INFO L124 PetriNetUnfolderBase]: 1803/2935 cut-off events. [2024-06-27 17:57:03,833 INFO L125 PetriNetUnfolderBase]: For 21509/21512 co-relation queries the response was YES. [2024-06-27 17:57:03,842 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. [2024-06-27 17:57:03,852 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 117 selfloop transitions, 25 changer transitions 0/156 dead transitions. [2024-06-27 17:57:03,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 156 transitions, 1555 flow [2024-06-27 17:57:03,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:57:03,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:57:03,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 183 transitions. [2024-06-27 17:57:03,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6630434782608695 [2024-06-27 17:57:03,854 INFO L175 Difference]: Start difference. First operand has 100 places, 118 transitions, 1069 flow. Second operand 6 states and 183 transitions. [2024-06-27 17:57:03,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 156 transitions, 1555 flow [2024-06-27 17:57:03,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 156 transitions, 1507 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-27 17:57:03,879 INFO L231 Difference]: Finished difference. Result has 102 places, 124 transitions, 1161 flow [2024-06-27 17:57:03,879 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} [2024-06-27 17:57:03,880 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 52 predicate places. [2024-06-27 17:57:03,880 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 124 transitions, 1161 flow [2024-06-27 17:57:03,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:03,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:03,880 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:03,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 17:57:03,880 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:03,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:03,881 INFO L85 PathProgramCache]: Analyzing trace with hash 256562947, now seen corresponding path program 3 times [2024-06-27 17:57:03,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:03,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394251117] [2024-06-27 17:57:03,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:03,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:03,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:03,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:03,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:03,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394251117] [2024-06-27 17:57:03,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394251117] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:03,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:03,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:57:03,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698675459] [2024-06-27 17:57:03,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:03,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:57:03,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:03,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:57:03,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:57:03,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:57:03,964 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) [2024-06-27 17:57:03,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:03,965 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:57:03,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:04,249 INFO L124 PetriNetUnfolderBase]: 1798/2944 cut-off events. [2024-06-27 17:57:04,249 INFO L125 PetriNetUnfolderBase]: For 24539/24539 co-relation queries the response was YES. [2024-06-27 17:57:04,258 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. [2024-06-27 17:57:04,271 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 112 selfloop transitions, 25 changer transitions 0/151 dead transitions. [2024-06-27 17:57:04,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 151 transitions, 1499 flow [2024-06-27 17:57:04,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:57:04,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:57:04,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 178 transitions. [2024-06-27 17:57:04,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.644927536231884 [2024-06-27 17:57:04,272 INFO L175 Difference]: Start difference. First operand has 102 places, 124 transitions, 1161 flow. Second operand 6 states and 178 transitions. [2024-06-27 17:57:04,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 151 transitions, 1499 flow [2024-06-27 17:57:04,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 151 transitions, 1433 flow, removed 26 selfloop flow, removed 2 redundant places. [2024-06-27 17:57:04,301 INFO L231 Difference]: Finished difference. Result has 106 places, 124 transitions, 1153 flow [2024-06-27 17:57:04,301 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} [2024-06-27 17:57:04,302 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 56 predicate places. [2024-06-27 17:57:04,302 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 124 transitions, 1153 flow [2024-06-27 17:57:04,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:04,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:04,302 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:04,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 17:57:04,302 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)] === [2024-06-27 17:57:04,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:04,302 INFO L85 PathProgramCache]: Analyzing trace with hash -1986973598, now seen corresponding path program 1 times [2024-06-27 17:57:04,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:04,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407327673] [2024-06-27 17:57:04,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:04,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:04,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:04,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:04,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:04,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407327673] [2024-06-27 17:57:04,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407327673] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:04,372 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:04,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:57:04,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316495838] [2024-06-27 17:57:04,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:04,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:57:04,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:04,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:57:04,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:57:04,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 46 [2024-06-27 17:57:04,402 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) [2024-06-27 17:57:04,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:04,402 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 46 [2024-06-27 17:57:04,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:04,650 INFO L124 PetriNetUnfolderBase]: 1737/2871 cut-off events. [2024-06-27 17:57:04,650 INFO L125 PetriNetUnfolderBase]: For 25442/25456 co-relation queries the response was YES. [2024-06-27 17:57:04,661 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. [2024-06-27 17:57:04,673 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 97 selfloop transitions, 23 changer transitions 0/147 dead transitions. [2024-06-27 17:57:04,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 147 transitions, 1515 flow [2024-06-27 17:57:04,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:57:04,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:57:04,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 149 transitions. [2024-06-27 17:57:04,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6478260869565218 [2024-06-27 17:57:04,675 INFO L175 Difference]: Start difference. First operand has 106 places, 124 transitions, 1153 flow. Second operand 5 states and 149 transitions. [2024-06-27 17:57:04,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 147 transitions, 1515 flow [2024-06-27 17:57:04,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 147 transitions, 1445 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-27 17:57:04,708 INFO L231 Difference]: Finished difference. Result has 107 places, 131 transitions, 1217 flow [2024-06-27 17:57:04,709 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} [2024-06-27 17:57:04,709 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 57 predicate places. [2024-06-27 17:57:04,709 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 131 transitions, 1217 flow [2024-06-27 17:57:04,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:04,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:04,710 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:04,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 17:57:04,710 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:04,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:04,710 INFO L85 PathProgramCache]: Analyzing trace with hash 2042416114, now seen corresponding path program 1 times [2024-06-27 17:57:04,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:04,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572684636] [2024-06-27 17:57:04,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:04,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:04,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:04,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:04,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:04,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572684636] [2024-06-27 17:57:04,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572684636] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:04,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:04,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:57:04,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421708468] [2024-06-27 17:57:04,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:04,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:57:04,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:04,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:57:04,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:57:04,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:57:04,818 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) [2024-06-27 17:57:04,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:04,818 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:57:04,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:05,121 INFO L124 PetriNetUnfolderBase]: 1892/3150 cut-off events. [2024-06-27 17:57:05,122 INFO L125 PetriNetUnfolderBase]: For 29453/29453 co-relation queries the response was YES. [2024-06-27 17:57:05,132 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. [2024-06-27 17:57:05,143 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 134 selfloop transitions, 35 changer transitions 0/183 dead transitions. [2024-06-27 17:57:05,143 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 183 transitions, 1851 flow [2024-06-27 17:57:05,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:57:05,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:57:05,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 223 transitions. [2024-06-27 17:57:05,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6925465838509317 [2024-06-27 17:57:05,145 INFO L175 Difference]: Start difference. First operand has 107 places, 131 transitions, 1217 flow. Second operand 7 states and 223 transitions. [2024-06-27 17:57:05,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 183 transitions, 1851 flow [2024-06-27 17:57:05,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 183 transitions, 1771 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-27 17:57:05,176 INFO L231 Difference]: Finished difference. Result has 112 places, 141 transitions, 1340 flow [2024-06-27 17:57:05,176 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} [2024-06-27 17:57:05,177 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 62 predicate places. [2024-06-27 17:57:05,177 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 141 transitions, 1340 flow [2024-06-27 17:57:05,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:05,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:05,177 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:05,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 17:57:05,177 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:05,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:05,178 INFO L85 PathProgramCache]: Analyzing trace with hash -1672873832, now seen corresponding path program 2 times [2024-06-27 17:57:05,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:05,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97815813] [2024-06-27 17:57:05,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:05,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:05,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:05,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:05,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:05,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97815813] [2024-06-27 17:57:05,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97815813] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:05,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:05,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:57:05,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67264632] [2024-06-27 17:57:05,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:05,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:57:05,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:05,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:57:05,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:57:05,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:57:05,278 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) [2024-06-27 17:57:05,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:05,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:57:05,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:05,573 INFO L124 PetriNetUnfolderBase]: 2041/3373 cut-off events. [2024-06-27 17:57:05,573 INFO L125 PetriNetUnfolderBase]: For 36174/36174 co-relation queries the response was YES. [2024-06-27 17:57:05,585 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. [2024-06-27 17:57:05,633 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 115 selfloop transitions, 75 changer transitions 0/204 dead transitions. [2024-06-27 17:57:05,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 204 transitions, 2282 flow [2024-06-27 17:57:05,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:57:05,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:57:05,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 230 transitions. [2024-06-27 17:57:05,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7142857142857143 [2024-06-27 17:57:05,635 INFO L175 Difference]: Start difference. First operand has 112 places, 141 transitions, 1340 flow. Second operand 7 states and 230 transitions. [2024-06-27 17:57:05,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 204 transitions, 2282 flow [2024-06-27 17:57:05,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 204 transitions, 2143 flow, removed 43 selfloop flow, removed 3 redundant places. [2024-06-27 17:57:05,683 INFO L231 Difference]: Finished difference. Result has 117 places, 158 transitions, 1573 flow [2024-06-27 17:57:05,683 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} [2024-06-27 17:57:05,684 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 67 predicate places. [2024-06-27 17:57:05,684 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 158 transitions, 1573 flow [2024-06-27 17:57:05,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:05,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:05,684 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:05,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 17:57:05,684 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:05,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:05,685 INFO L85 PathProgramCache]: Analyzing trace with hash -1672666442, now seen corresponding path program 3 times [2024-06-27 17:57:05,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:05,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898929824] [2024-06-27 17:57:05,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:05,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:05,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:05,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:05,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:05,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898929824] [2024-06-27 17:57:05,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898929824] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:05,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:05,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:57:05,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426808487] [2024-06-27 17:57:05,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:05,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:57:05,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:05,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:57:05,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:57:05,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:57:05,780 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) [2024-06-27 17:57:05,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:05,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:57:05,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:06,082 INFO L124 PetriNetUnfolderBase]: 2048/3388 cut-off events. [2024-06-27 17:57:06,083 INFO L125 PetriNetUnfolderBase]: For 41127/41127 co-relation queries the response was YES. [2024-06-27 17:57:06,095 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. [2024-06-27 17:57:06,110 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 108 selfloop transitions, 84 changer transitions 0/206 dead transitions. [2024-06-27 17:57:06,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 206 transitions, 2329 flow [2024-06-27 17:57:06,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:57:06,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:57:06,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 228 transitions. [2024-06-27 17:57:06,111 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7080745341614907 [2024-06-27 17:57:06,111 INFO L175 Difference]: Start difference. First operand has 117 places, 158 transitions, 1573 flow. Second operand 7 states and 228 transitions. [2024-06-27 17:57:06,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 206 transitions, 2329 flow [2024-06-27 17:57:06,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 206 transitions, 2193 flow, removed 57 selfloop flow, removed 1 redundant places. [2024-06-27 17:57:06,163 INFO L231 Difference]: Finished difference. Result has 123 places, 163 transitions, 1695 flow [2024-06-27 17:57:06,164 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} [2024-06-27 17:57:06,164 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 73 predicate places. [2024-06-27 17:57:06,164 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 163 transitions, 1695 flow [2024-06-27 17:57:06,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:06,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:06,165 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:06,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 17:57:06,165 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:06,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:06,165 INFO L85 PathProgramCache]: Analyzing trace with hash 877800660, now seen corresponding path program 1 times [2024-06-27 17:57:06,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:06,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890571358] [2024-06-27 17:57:06,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:06,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:06,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:06,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:06,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:06,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890571358] [2024-06-27 17:57:06,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890571358] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:06,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:06,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:57:06,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417534215] [2024-06-27 17:57:06,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:06,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:57:06,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:06,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:57:06,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:57:06,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:57:06,262 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) [2024-06-27 17:57:06,262 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:06,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:57:06,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:06,606 INFO L124 PetriNetUnfolderBase]: 2170/3549 cut-off events. [2024-06-27 17:57:06,606 INFO L125 PetriNetUnfolderBase]: For 46412/46412 co-relation queries the response was YES. [2024-06-27 17:57:06,620 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. [2024-06-27 17:57:06,633 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 142 selfloop transitions, 53 changer transitions 0/209 dead transitions. [2024-06-27 17:57:06,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 209 transitions, 2357 flow [2024-06-27 17:57:06,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:57:06,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:57:06,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 225 transitions. [2024-06-27 17:57:06,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6987577639751553 [2024-06-27 17:57:06,635 INFO L175 Difference]: Start difference. First operand has 123 places, 163 transitions, 1695 flow. Second operand 7 states and 225 transitions. [2024-06-27 17:57:06,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 209 transitions, 2357 flow [2024-06-27 17:57:06,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 209 transitions, 2188 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-27 17:57:06,685 INFO L231 Difference]: Finished difference. Result has 126 places, 166 transitions, 1693 flow [2024-06-27 17:57:06,686 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} [2024-06-27 17:57:06,686 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 76 predicate places. [2024-06-27 17:57:06,686 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 166 transitions, 1693 flow [2024-06-27 17:57:06,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:06,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:06,686 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:06,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 17:57:06,687 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)] === [2024-06-27 17:57:06,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:06,687 INFO L85 PathProgramCache]: Analyzing trace with hash -1479033234, now seen corresponding path program 1 times [2024-06-27 17:57:06,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:06,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105367399] [2024-06-27 17:57:06,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:06,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:06,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:06,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:06,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:06,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105367399] [2024-06-27 17:57:06,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105367399] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:06,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:06,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:57:06,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696212999] [2024-06-27 17:57:06,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:06,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:57:06,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:06,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:57:06,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:57:06,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 46 [2024-06-27 17:57:06,782 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) [2024-06-27 17:57:06,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:06,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 46 [2024-06-27 17:57:06,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:07,085 INFO L124 PetriNetUnfolderBase]: 2062/3437 cut-off events. [2024-06-27 17:57:07,086 INFO L125 PetriNetUnfolderBase]: For 45783/45807 co-relation queries the response was YES. [2024-06-27 17:57:07,099 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. [2024-06-27 17:57:07,111 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 137 selfloop transitions, 28 changer transitions 0/193 dead transitions. [2024-06-27 17:57:07,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 193 transitions, 2191 flow [2024-06-27 17:57:07,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:57:07,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:57:07,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 156 transitions. [2024-06-27 17:57:07,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6782608695652174 [2024-06-27 17:57:07,113 INFO L175 Difference]: Start difference. First operand has 126 places, 166 transitions, 1693 flow. Second operand 5 states and 156 transitions. [2024-06-27 17:57:07,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 193 transitions, 2191 flow [2024-06-27 17:57:07,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 193 transitions, 2052 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-27 17:57:07,175 INFO L231 Difference]: Finished difference. Result has 126 places, 171 transitions, 1695 flow [2024-06-27 17:57:07,175 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} [2024-06-27 17:57:07,175 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 76 predicate places. [2024-06-27 17:57:07,176 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 171 transitions, 1695 flow [2024-06-27 17:57:07,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:07,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:07,176 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:07,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 17:57:07,176 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:07,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:07,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1088095172, now seen corresponding path program 4 times [2024-06-27 17:57:07,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:07,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49750391] [2024-06-27 17:57:07,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:07,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:07,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:07,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:07,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:07,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49750391] [2024-06-27 17:57:07,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49750391] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:07,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:07,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:57:07,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345700542] [2024-06-27 17:57:07,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:07,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:57:07,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:07,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:57:07,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:57:07,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:57:07,272 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) [2024-06-27 17:57:07,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:07,272 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:57:07,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:07,665 INFO L124 PetriNetUnfolderBase]: 2277/3719 cut-off events. [2024-06-27 17:57:07,665 INFO L125 PetriNetUnfolderBase]: For 50302/50302 co-relation queries the response was YES. [2024-06-27 17:57:07,678 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. [2024-06-27 17:57:07,692 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 113 selfloop transitions, 95 changer transitions 0/222 dead transitions. [2024-06-27 17:57:07,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 222 transitions, 2557 flow [2024-06-27 17:57:07,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:57:07,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:57:07,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 222 transitions. [2024-06-27 17:57:07,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6894409937888198 [2024-06-27 17:57:07,694 INFO L175 Difference]: Start difference. First operand has 126 places, 171 transitions, 1695 flow. Second operand 7 states and 222 transitions. [2024-06-27 17:57:07,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 222 transitions, 2557 flow [2024-06-27 17:57:07,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 222 transitions, 2503 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-06-27 17:57:07,748 INFO L231 Difference]: Finished difference. Result has 132 places, 184 transitions, 2089 flow [2024-06-27 17:57:07,748 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} [2024-06-27 17:57:07,748 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 82 predicate places. [2024-06-27 17:57:07,748 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 184 transitions, 2089 flow [2024-06-27 17:57:07,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:07,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:07,749 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:07,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 17:57:07,749 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)] === [2024-06-27 17:57:07,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:07,749 INFO L85 PathProgramCache]: Analyzing trace with hash -525670256, now seen corresponding path program 5 times [2024-06-27 17:57:07,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:07,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365169984] [2024-06-27 17:57:07,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:07,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:07,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:07,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:07,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:07,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365169984] [2024-06-27 17:57:07,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365169984] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:07,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:07,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:57:07,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566946447] [2024-06-27 17:57:07,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:07,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:57:07,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:07,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:57:07,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:57:07,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:57:07,842 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) [2024-06-27 17:57:07,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:07,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:57:07,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:08,255 INFO L124 PetriNetUnfolderBase]: 2320/3815 cut-off events. [2024-06-27 17:57:08,256 INFO L125 PetriNetUnfolderBase]: For 58732/58732 co-relation queries the response was YES. [2024-06-27 17:57:08,271 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. [2024-06-27 17:57:08,287 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 124 selfloop transitions, 91 changer transitions 0/229 dead transitions. [2024-06-27 17:57:08,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 229 transitions, 2937 flow [2024-06-27 17:57:08,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:57:08,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:57:08,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 224 transitions. [2024-06-27 17:57:08,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6956521739130435 [2024-06-27 17:57:08,289 INFO L175 Difference]: Start difference. First operand has 132 places, 184 transitions, 2089 flow. Second operand 7 states and 224 transitions. [2024-06-27 17:57:08,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 229 transitions, 2937 flow [2024-06-27 17:57:08,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 229 transitions, 2815 flow, removed 48 selfloop flow, removed 2 redundant places. [2024-06-27 17:57:08,366 INFO L231 Difference]: Finished difference. Result has 138 places, 191 transitions, 2304 flow [2024-06-27 17:57:08,366 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} [2024-06-27 17:57:08,366 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 88 predicate places. [2024-06-27 17:57:08,367 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 191 transitions, 2304 flow [2024-06-27 17:57:08,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:08,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:08,367 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:08,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 17:57:08,367 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)] === [2024-06-27 17:57:08,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:08,368 INFO L85 PathProgramCache]: Analyzing trace with hash -525877646, now seen corresponding path program 6 times [2024-06-27 17:57:08,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:08,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917983986] [2024-06-27 17:57:08,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:08,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:08,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:08,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:08,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:08,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917983986] [2024-06-27 17:57:08,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917983986] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:08,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:08,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:57:08,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704552762] [2024-06-27 17:57:08,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:08,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:57:08,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:08,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:57:08,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:57:08,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:57:08,456 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) [2024-06-27 17:57:08,456 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:08,456 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:57:08,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:08,839 INFO L124 PetriNetUnfolderBase]: 2313/3786 cut-off events. [2024-06-27 17:57:08,840 INFO L125 PetriNetUnfolderBase]: For 59794/59794 co-relation queries the response was YES. [2024-06-27 17:57:08,853 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. [2024-06-27 17:57:08,866 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 124 selfloop transitions, 90 changer transitions 0/228 dead transitions. [2024-06-27 17:57:08,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 228 transitions, 3002 flow [2024-06-27 17:57:08,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:57:08,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:57:08,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 222 transitions. [2024-06-27 17:57:08,868 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6894409937888198 [2024-06-27 17:57:08,868 INFO L175 Difference]: Start difference. First operand has 138 places, 191 transitions, 2304 flow. Second operand 7 states and 222 transitions. [2024-06-27 17:57:08,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 228 transitions, 3002 flow [2024-06-27 17:57:08,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 228 transitions, 2773 flow, removed 50 selfloop flow, removed 3 redundant places. [2024-06-27 17:57:08,957 INFO L231 Difference]: Finished difference. Result has 142 places, 191 transitions, 2266 flow [2024-06-27 17:57:08,957 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} [2024-06-27 17:57:08,957 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 92 predicate places. [2024-06-27 17:57:08,957 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 191 transitions, 2266 flow [2024-06-27 17:57:08,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:08,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:08,958 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:08,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 17:57:08,958 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:08,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:08,958 INFO L85 PathProgramCache]: Analyzing trace with hash -390697772, now seen corresponding path program 2 times [2024-06-27 17:57:08,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:08,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361024948] [2024-06-27 17:57:08,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:08,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:08,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:09,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:09,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:09,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361024948] [2024-06-27 17:57:09,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361024948] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:09,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:09,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:57:09,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219354516] [2024-06-27 17:57:09,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:09,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:57:09,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:09,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:57:09,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:57:09,063 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:57:09,063 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) [2024-06-27 17:57:09,063 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:09,063 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:57:09,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:09,457 INFO L124 PetriNetUnfolderBase]: 2435/3970 cut-off events. [2024-06-27 17:57:09,457 INFO L125 PetriNetUnfolderBase]: For 66708/66708 co-relation queries the response was YES. [2024-06-27 17:57:09,472 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. [2024-06-27 17:57:09,486 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 166 selfloop transitions, 54 changer transitions 0/234 dead transitions. [2024-06-27 17:57:09,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 234 transitions, 3006 flow [2024-06-27 17:57:09,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:57:09,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:57:09,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 220 transitions. [2024-06-27 17:57:09,495 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6832298136645962 [2024-06-27 17:57:09,495 INFO L175 Difference]: Start difference. First operand has 142 places, 191 transitions, 2266 flow. Second operand 7 states and 220 transitions. [2024-06-27 17:57:09,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 234 transitions, 3006 flow [2024-06-27 17:57:09,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 234 transitions, 2790 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-27 17:57:09,571 INFO L231 Difference]: Finished difference. Result has 143 places, 194 transitions, 2225 flow [2024-06-27 17:57:09,572 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} [2024-06-27 17:57:09,572 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 93 predicate places. [2024-06-27 17:57:09,572 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 194 transitions, 2225 flow [2024-06-27 17:57:09,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:09,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:09,572 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:09,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 17:57:09,573 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:09,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:09,573 INFO L85 PathProgramCache]: Analyzing trace with hash -525662320, now seen corresponding path program 3 times [2024-06-27 17:57:09,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:09,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663050252] [2024-06-27 17:57:09,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:09,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:09,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:09,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:09,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:09,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663050252] [2024-06-27 17:57:09,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663050252] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:09,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:09,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:57:09,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803916567] [2024-06-27 17:57:09,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:09,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:57:09,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:09,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:57:09,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:57:09,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:57:09,668 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) [2024-06-27 17:57:09,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:09,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:57:09,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:10,106 INFO L124 PetriNetUnfolderBase]: 2557/4286 cut-off events. [2024-06-27 17:57:10,107 INFO L125 PetriNetUnfolderBase]: For 72380/72380 co-relation queries the response was YES. [2024-06-27 17:57:10,124 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. [2024-06-27 17:57:10,139 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 172 selfloop transitions, 51 changer transitions 0/237 dead transitions. [2024-06-27 17:57:10,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 237 transitions, 2983 flow [2024-06-27 17:57:10,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:57:10,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:57:10,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 220 transitions. [2024-06-27 17:57:10,140 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6832298136645962 [2024-06-27 17:57:10,140 INFO L175 Difference]: Start difference. First operand has 143 places, 194 transitions, 2225 flow. Second operand 7 states and 220 transitions. [2024-06-27 17:57:10,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 237 transitions, 2983 flow [2024-06-27 17:57:10,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 237 transitions, 2842 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-27 17:57:10,226 INFO L231 Difference]: Finished difference. Result has 145 places, 197 transitions, 2259 flow [2024-06-27 17:57:10,226 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} [2024-06-27 17:57:10,227 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 95 predicate places. [2024-06-27 17:57:10,227 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 197 transitions, 2259 flow [2024-06-27 17:57:10,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:10,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:10,227 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:10,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 17:57:10,227 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:10,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:10,228 INFO L85 PathProgramCache]: Analyzing trace with hash -259638610, now seen corresponding path program 4 times [2024-06-27 17:57:10,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:10,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623709819] [2024-06-27 17:57:10,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:10,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:10,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:10,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:10,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:10,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623709819] [2024-06-27 17:57:10,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623709819] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:10,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:10,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:57:10,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847087916] [2024-06-27 17:57:10,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:10,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:57:10,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:10,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:57:10,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:57:10,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:57:10,332 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) [2024-06-27 17:57:10,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:10,336 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:57:10,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:10,776 INFO L124 PetriNetUnfolderBase]: 2808/4617 cut-off events. [2024-06-27 17:57:10,777 INFO L125 PetriNetUnfolderBase]: For 80900/80900 co-relation queries the response was YES. [2024-06-27 17:57:10,795 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. [2024-06-27 17:57:10,866 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 172 selfloop transitions, 61 changer transitions 0/247 dead transitions. [2024-06-27 17:57:10,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 247 transitions, 3147 flow [2024-06-27 17:57:10,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:57:10,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:57:10,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 224 transitions. [2024-06-27 17:57:10,867 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6956521739130435 [2024-06-27 17:57:10,867 INFO L175 Difference]: Start difference. First operand has 145 places, 197 transitions, 2259 flow. Second operand 7 states and 224 transitions. [2024-06-27 17:57:10,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 247 transitions, 3147 flow [2024-06-27 17:57:10,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 247 transitions, 3006 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-27 17:57:10,980 INFO L231 Difference]: Finished difference. Result has 148 places, 202 transitions, 2365 flow [2024-06-27 17:57:10,980 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} [2024-06-27 17:57:10,980 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 98 predicate places. [2024-06-27 17:57:10,981 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 202 transitions, 2365 flow [2024-06-27 17:57:10,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:10,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:10,981 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:10,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 17:57:10,981 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:10,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:10,981 INFO L85 PathProgramCache]: Analyzing trace with hash -750775344, now seen corresponding path program 2 times [2024-06-27 17:57:10,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:10,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740975130] [2024-06-27 17:57:10,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:10,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:10,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:11,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:11,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:11,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740975130] [2024-06-27 17:57:11,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740975130] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:11,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:11,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:57:11,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116147089] [2024-06-27 17:57:11,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:11,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:57:11,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:11,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:57:11,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:57:11,052 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 46 [2024-06-27 17:57:11,053 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) [2024-06-27 17:57:11,053 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:11,053 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 46 [2024-06-27 17:57:11,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:11,431 INFO L124 PetriNetUnfolderBase]: 2565/4318 cut-off events. [2024-06-27 17:57:11,431 INFO L125 PetriNetUnfolderBase]: For 77502/77512 co-relation queries the response was YES. [2024-06-27 17:57:11,452 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. [2024-06-27 17:57:11,468 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 159 selfloop transitions, 26 changer transitions 0/217 dead transitions. [2024-06-27 17:57:11,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 217 transitions, 2769 flow [2024-06-27 17:57:11,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:57:11,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:57:11,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 148 transitions. [2024-06-27 17:57:11,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6434782608695652 [2024-06-27 17:57:11,469 INFO L175 Difference]: Start difference. First operand has 148 places, 202 transitions, 2365 flow. Second operand 5 states and 148 transitions. [2024-06-27 17:57:11,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 217 transitions, 2769 flow [2024-06-27 17:57:11,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 217 transitions, 2630 flow, removed 37 selfloop flow, removed 3 redundant places. [2024-06-27 17:57:11,595 INFO L231 Difference]: Finished difference. Result has 150 places, 202 transitions, 2289 flow [2024-06-27 17:57:11,595 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} [2024-06-27 17:57:11,596 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 100 predicate places. [2024-06-27 17:57:11,596 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 202 transitions, 2289 flow [2024-06-27 17:57:11,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:11,596 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:11,596 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:11,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 17:57:11,597 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)] === [2024-06-27 17:57:11,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:11,597 INFO L85 PathProgramCache]: Analyzing trace with hash -1472360050, now seen corresponding path program 1 times [2024-06-27 17:57:11,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:11,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670291991] [2024-06-27 17:57:11,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:11,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:11,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:11,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:11,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:11,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670291991] [2024-06-27 17:57:11,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670291991] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:11,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:11,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:57:11,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184170766] [2024-06-27 17:57:11,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:11,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:57:11,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:11,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:57:11,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:57:11,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:57:11,665 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) [2024-06-27 17:57:11,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:11,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:57:11,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:12,135 INFO L124 PetriNetUnfolderBase]: 2800/4650 cut-off events. [2024-06-27 17:57:12,135 INFO L125 PetriNetUnfolderBase]: For 79673/79673 co-relation queries the response was YES. [2024-06-27 17:57:12,156 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. [2024-06-27 17:57:12,175 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 192 selfloop transitions, 18 changer transitions 0/224 dead transitions. [2024-06-27 17:57:12,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 224 transitions, 2848 flow [2024-06-27 17:57:12,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:57:12,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:57:12,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 148 transitions. [2024-06-27 17:57:12,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6434782608695652 [2024-06-27 17:57:12,177 INFO L175 Difference]: Start difference. First operand has 150 places, 202 transitions, 2289 flow. Second operand 5 states and 148 transitions. [2024-06-27 17:57:12,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 224 transitions, 2848 flow [2024-06-27 17:57:12,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 224 transitions, 2772 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-27 17:57:12,285 INFO L231 Difference]: Finished difference. Result has 150 places, 205 transitions, 2298 flow [2024-06-27 17:57:12,285 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} [2024-06-27 17:57:12,285 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 100 predicate places. [2024-06-27 17:57:12,286 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 205 transitions, 2298 flow [2024-06-27 17:57:12,286 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) [2024-06-27 17:57:12,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:12,286 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:12,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 17:57:12,286 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:12,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:12,287 INFO L85 PathProgramCache]: Analyzing trace with hash -750768400, now seen corresponding path program 2 times [2024-06-27 17:57:12,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:12,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109236582] [2024-06-27 17:57:12,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:12,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:12,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:12,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:12,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:12,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109236582] [2024-06-27 17:57:12,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109236582] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:12,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:12,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:57:12,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781713227] [2024-06-27 17:57:12,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:12,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:57:12,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:12,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:57:12,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:57:12,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:57:12,360 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) [2024-06-27 17:57:12,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:12,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:57:12,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:12,835 INFO L124 PetriNetUnfolderBase]: 2782/4547 cut-off events. [2024-06-27 17:57:12,835 INFO L125 PetriNetUnfolderBase]: For 81976/81976 co-relation queries the response was YES. [2024-06-27 17:57:12,859 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. [2024-06-27 17:57:12,877 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 187 selfloop transitions, 19 changer transitions 0/220 dead transitions. [2024-06-27 17:57:12,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 220 transitions, 2744 flow [2024-06-27 17:57:12,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:57:12,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:57:12,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 145 transitions. [2024-06-27 17:57:12,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6304347826086957 [2024-06-27 17:57:12,878 INFO L175 Difference]: Start difference. First operand has 150 places, 205 transitions, 2298 flow. Second operand 5 states and 145 transitions. [2024-06-27 17:57:12,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 220 transitions, 2744 flow [2024-06-27 17:57:13,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 220 transitions, 2717 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-27 17:57:13,010 INFO L231 Difference]: Finished difference. Result has 153 places, 205 transitions, 2315 flow [2024-06-27 17:57:13,010 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} [2024-06-27 17:57:13,011 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 103 predicate places. [2024-06-27 17:57:13,011 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 205 transitions, 2315 flow [2024-06-27 17:57:13,011 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) [2024-06-27 17:57:13,011 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:13,011 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:13,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 17:57:13,012 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)] === [2024-06-27 17:57:13,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:13,013 INFO L85 PathProgramCache]: Analyzing trace with hash -59249160, now seen corresponding path program 1 times [2024-06-27 17:57:13,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:13,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826054448] [2024-06-27 17:57:13,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:13,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:13,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:13,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:13,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:13,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826054448] [2024-06-27 17:57:13,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826054448] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:13,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:13,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:57:13,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556892744] [2024-06-27 17:57:13,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:13,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:57:13,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:13,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:57:13,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:57:13,113 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:57:13,113 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) [2024-06-27 17:57:13,113 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:13,113 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:57:13,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:13,635 INFO L124 PetriNetUnfolderBase]: 2844/4718 cut-off events. [2024-06-27 17:57:13,636 INFO L125 PetriNetUnfolderBase]: For 91792/91792 co-relation queries the response was YES. [2024-06-27 17:57:13,655 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. [2024-06-27 17:57:13,671 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 225 selfloop transitions, 19 changer transitions 0/258 dead transitions. [2024-06-27 17:57:13,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 258 transitions, 3131 flow [2024-06-27 17:57:13,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:57:13,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:57:13,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 237 transitions. [2024-06-27 17:57:13,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6440217391304348 [2024-06-27 17:57:13,672 INFO L175 Difference]: Start difference. First operand has 153 places, 205 transitions, 2315 flow. Second operand 8 states and 237 transitions. [2024-06-27 17:57:13,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 258 transitions, 3131 flow [2024-06-27 17:57:13,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 258 transitions, 3068 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-27 17:57:13,786 INFO L231 Difference]: Finished difference. Result has 156 places, 209 transitions, 2405 flow [2024-06-27 17:57:13,786 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} [2024-06-27 17:57:13,787 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 106 predicate places. [2024-06-27 17:57:13,787 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 209 transitions, 2405 flow [2024-06-27 17:57:13,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:13,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:13,787 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:13,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 17:57:13,787 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)] === [2024-06-27 17:57:13,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:13,788 INFO L85 PathProgramCache]: Analyzing trace with hash 478811816, now seen corresponding path program 2 times [2024-06-27 17:57:13,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:13,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830541225] [2024-06-27 17:57:13,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:13,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:13,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:13,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:13,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:13,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830541225] [2024-06-27 17:57:13,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830541225] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:13,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:13,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:57:13,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871150630] [2024-06-27 17:57:13,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:13,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:57:13,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:13,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:57:13,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:57:13,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:57:13,885 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) [2024-06-27 17:57:13,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:13,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:57:13,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:14,376 INFO L124 PetriNetUnfolderBase]: 2836/4690 cut-off events. [2024-06-27 17:57:14,377 INFO L125 PetriNetUnfolderBase]: For 94927/94927 co-relation queries the response was YES. [2024-06-27 17:57:14,397 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. [2024-06-27 17:57:14,414 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 220 selfloop transitions, 15 changer transitions 0/249 dead transitions. [2024-06-27 17:57:14,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 249 transitions, 2971 flow [2024-06-27 17:57:14,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:57:14,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:57:14,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 207 transitions. [2024-06-27 17:57:14,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2024-06-27 17:57:14,415 INFO L175 Difference]: Start difference. First operand has 156 places, 209 transitions, 2405 flow. Second operand 7 states and 207 transitions. [2024-06-27 17:57:14,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 249 transitions, 2971 flow [2024-06-27 17:57:14,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 249 transitions, 2861 flow, removed 47 selfloop flow, removed 4 redundant places. [2024-06-27 17:57:14,555 INFO L231 Difference]: Finished difference. Result has 159 places, 209 transitions, 2332 flow [2024-06-27 17:57:14,555 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} [2024-06-27 17:57:14,556 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 109 predicate places. [2024-06-27 17:57:14,556 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 209 transitions, 2332 flow [2024-06-27 17:57:14,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:14,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:14,556 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:14,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 17:57:14,556 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)] === [2024-06-27 17:57:14,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:14,557 INFO L85 PathProgramCache]: Analyzing trace with hash 762538630, now seen corresponding path program 3 times [2024-06-27 17:57:14,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:14,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097146275] [2024-06-27 17:57:14,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:14,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:14,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:14,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:14,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:14,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097146275] [2024-06-27 17:57:14,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097146275] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:14,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:14,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:57:14,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186736719] [2024-06-27 17:57:14,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:14,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:57:14,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:14,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:57:14,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:57:14,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:57:14,647 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) [2024-06-27 17:57:14,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:14,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:57:14,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:15,189 INFO L124 PetriNetUnfolderBase]: 2863/4786 cut-off events. [2024-06-27 17:57:15,190 INFO L125 PetriNetUnfolderBase]: For 100237/100240 co-relation queries the response was YES. [2024-06-27 17:57:15,209 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. [2024-06-27 17:57:15,224 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 207 selfloop transitions, 27 changer transitions 0/248 dead transitions. [2024-06-27 17:57:15,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 248 transitions, 2944 flow [2024-06-27 17:57:15,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:57:15,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:57:15,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 208 transitions. [2024-06-27 17:57:15,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6459627329192547 [2024-06-27 17:57:15,225 INFO L175 Difference]: Start difference. First operand has 159 places, 209 transitions, 2332 flow. Second operand 7 states and 208 transitions. [2024-06-27 17:57:15,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 248 transitions, 2944 flow [2024-06-27 17:57:15,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 248 transitions, 2909 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-27 17:57:15,347 INFO L231 Difference]: Finished difference. Result has 160 places, 211 transitions, 2418 flow [2024-06-27 17:57:15,347 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} [2024-06-27 17:57:15,347 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 110 predicate places. [2024-06-27 17:57:15,347 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 211 transitions, 2418 flow [2024-06-27 17:57:15,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:15,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:15,348 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:15,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 17:57:15,348 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)] === [2024-06-27 17:57:15,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:15,348 INFO L85 PathProgramCache]: Analyzing trace with hash -967469818, now seen corresponding path program 4 times [2024-06-27 17:57:15,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:15,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800861530] [2024-06-27 17:57:15,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:15,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:15,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:15,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:15,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:15,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800861530] [2024-06-27 17:57:15,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800861530] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:15,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:15,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:57:15,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622175738] [2024-06-27 17:57:15,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:15,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:57:15,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:15,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:57:15,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:57:15,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:57:15,449 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) [2024-06-27 17:57:15,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:15,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:57:15,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:15,917 INFO L124 PetriNetUnfolderBase]: 2855/4769 cut-off events. [2024-06-27 17:57:15,917 INFO L125 PetriNetUnfolderBase]: For 104518/104518 co-relation queries the response was YES. [2024-06-27 17:57:15,939 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. [2024-06-27 17:57:15,957 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 206 selfloop transitions, 27 changer transitions 0/247 dead transitions. [2024-06-27 17:57:15,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 247 transitions, 3024 flow [2024-06-27 17:57:15,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:57:15,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:57:15,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 205 transitions. [2024-06-27 17:57:15,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6366459627329193 [2024-06-27 17:57:15,958 INFO L175 Difference]: Start difference. First operand has 160 places, 211 transitions, 2418 flow. Second operand 7 states and 205 transitions. [2024-06-27 17:57:15,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 247 transitions, 3024 flow [2024-06-27 17:57:16,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 247 transitions, 2921 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-27 17:57:16,093 INFO L231 Difference]: Finished difference. Result has 162 places, 213 transitions, 2440 flow [2024-06-27 17:57:16,093 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} [2024-06-27 17:57:16,093 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 112 predicate places. [2024-06-27 17:57:16,093 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 213 transitions, 2440 flow [2024-06-27 17:57:16,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:16,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:16,093 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:16,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 17:57:16,093 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:16,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:16,094 INFO L85 PathProgramCache]: Analyzing trace with hash 1601479875, now seen corresponding path program 1 times [2024-06-27 17:57:16,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:16,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983723974] [2024-06-27 17:57:16,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:16,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:16,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:16,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:16,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:16,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983723974] [2024-06-27 17:57:16,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983723974] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:16,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:16,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:57:16,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179070918] [2024-06-27 17:57:16,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:16,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:57:16,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:16,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:57:16,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:57:16,160 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:57:16,161 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) [2024-06-27 17:57:16,161 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:16,161 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:57:16,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:16,666 INFO L124 PetriNetUnfolderBase]: 2917/4756 cut-off events. [2024-06-27 17:57:16,666 INFO L125 PetriNetUnfolderBase]: For 109112/109112 co-relation queries the response was YES. [2024-06-27 17:57:16,685 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. [2024-06-27 17:57:16,700 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 176 selfloop transitions, 57 changer transitions 0/247 dead transitions. [2024-06-27 17:57:16,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 247 transitions, 3258 flow [2024-06-27 17:57:16,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:57:16,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:57:16,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 181 transitions. [2024-06-27 17:57:16,701 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6557971014492754 [2024-06-27 17:57:16,701 INFO L175 Difference]: Start difference. First operand has 162 places, 213 transitions, 2440 flow. Second operand 6 states and 181 transitions. [2024-06-27 17:57:16,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 247 transitions, 3258 flow [2024-06-27 17:57:16,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 247 transitions, 3151 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-27 17:57:16,829 INFO L231 Difference]: Finished difference. Result has 164 places, 224 transitions, 2653 flow [2024-06-27 17:57:16,829 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} [2024-06-27 17:57:16,829 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 114 predicate places. [2024-06-27 17:57:16,829 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 224 transitions, 2653 flow [2024-06-27 17:57:16,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:16,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:16,829 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:16,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 17:57:16,830 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)] === [2024-06-27 17:57:16,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:16,830 INFO L85 PathProgramCache]: Analyzing trace with hash -1798982751, now seen corresponding path program 2 times [2024-06-27 17:57:16,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:16,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941421683] [2024-06-27 17:57:16,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:16,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:16,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:16,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:16,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:16,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941421683] [2024-06-27 17:57:16,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941421683] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:16,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:16,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:57:16,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347406398] [2024-06-27 17:57:16,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:16,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:57:16,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:16,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:57:16,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:57:16,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:57:16,914 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) [2024-06-27 17:57:16,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:16,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:57:16,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:17,363 INFO L124 PetriNetUnfolderBase]: 2941/4884 cut-off events. [2024-06-27 17:57:17,363 INFO L125 PetriNetUnfolderBase]: For 114189/114189 co-relation queries the response was YES. [2024-06-27 17:57:17,387 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. [2024-06-27 17:57:17,404 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 171 selfloop transitions, 64 changer transitions 0/249 dead transitions. [2024-06-27 17:57:17,405 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 249 transitions, 3452 flow [2024-06-27 17:57:17,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:57:17,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:57:17,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 179 transitions. [2024-06-27 17:57:17,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6485507246376812 [2024-06-27 17:57:17,405 INFO L175 Difference]: Start difference. First operand has 164 places, 224 transitions, 2653 flow. Second operand 6 states and 179 transitions. [2024-06-27 17:57:17,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 249 transitions, 3452 flow [2024-06-27 17:57:17,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 249 transitions, 3372 flow, removed 15 selfloop flow, removed 2 redundant places. [2024-06-27 17:57:17,560 INFO L231 Difference]: Finished difference. Result has 168 places, 228 transitions, 2785 flow [2024-06-27 17:57:17,560 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} [2024-06-27 17:57:17,560 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 118 predicate places. [2024-06-27 17:57:17,560 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 228 transitions, 2785 flow [2024-06-27 17:57:17,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:17,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:17,561 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:17,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 17:57:17,561 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)] === [2024-06-27 17:57:17,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:17,561 INFO L85 PathProgramCache]: Analyzing trace with hash 1091102345, now seen corresponding path program 3 times [2024-06-27 17:57:17,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:17,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735986839] [2024-06-27 17:57:17,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:17,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:17,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:17,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:17,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:17,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735986839] [2024-06-27 17:57:17,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735986839] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:17,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:17,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:57:17,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028810483] [2024-06-27 17:57:17,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:17,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:57:17,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:17,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:57:17,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:57:17,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:57:17,629 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) [2024-06-27 17:57:17,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:17,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:57:17,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:18,184 INFO L124 PetriNetUnfolderBase]: 2935/4883 cut-off events. [2024-06-27 17:57:18,184 INFO L125 PetriNetUnfolderBase]: For 118844/118844 co-relation queries the response was YES. [2024-06-27 17:57:18,206 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. [2024-06-27 17:57:18,226 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 164 selfloop transitions, 70 changer transitions 0/248 dead transitions. [2024-06-27 17:57:18,227 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 248 transitions, 3441 flow [2024-06-27 17:57:18,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:57:18,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:57:18,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 179 transitions. [2024-06-27 17:57:18,228 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6485507246376812 [2024-06-27 17:57:18,228 INFO L175 Difference]: Start difference. First operand has 168 places, 228 transitions, 2785 flow. Second operand 6 states and 179 transitions. [2024-06-27 17:57:18,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 248 transitions, 3441 flow [2024-06-27 17:57:18,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 248 transitions, 3219 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-27 17:57:18,426 INFO L231 Difference]: Finished difference. Result has 169 places, 228 transitions, 2710 flow [2024-06-27 17:57:18,426 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} [2024-06-27 17:57:18,427 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 119 predicate places. [2024-06-27 17:57:18,427 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 228 transitions, 2710 flow [2024-06-27 17:57:18,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:18,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:18,427 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:18,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 17:57:18,427 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)] === [2024-06-27 17:57:18,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:18,428 INFO L85 PathProgramCache]: Analyzing trace with hash 1778857473, now seen corresponding path program 1 times [2024-06-27 17:57:18,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:18,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238834167] [2024-06-27 17:57:18,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:18,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:18,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:18,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:18,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:18,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238834167] [2024-06-27 17:57:18,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238834167] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:18,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:18,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:57:18,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935785140] [2024-06-27 17:57:18,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:18,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:57:18,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:18,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:57:18,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:57:18,517 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 46 [2024-06-27 17:57:18,518 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) [2024-06-27 17:57:18,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:18,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 46 [2024-06-27 17:57:18,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:19,084 INFO L124 PetriNetUnfolderBase]: 2770/4692 cut-off events. [2024-06-27 17:57:19,084 INFO L125 PetriNetUnfolderBase]: For 123083/123109 co-relation queries the response was YES. [2024-06-27 17:57:19,111 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. [2024-06-27 17:57:19,133 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 186 selfloop transitions, 30 changer transitions 0/252 dead transitions. [2024-06-27 17:57:19,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 252 transitions, 3232 flow [2024-06-27 17:57:19,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:57:19,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:57:19,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 176 transitions. [2024-06-27 17:57:19,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6376811594202898 [2024-06-27 17:57:19,134 INFO L175 Difference]: Start difference. First operand has 169 places, 228 transitions, 2710 flow. Second operand 6 states and 176 transitions. [2024-06-27 17:57:19,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 252 transitions, 3232 flow [2024-06-27 17:57:19,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 252 transitions, 3059 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-27 17:57:19,287 INFO L231 Difference]: Finished difference. Result has 169 places, 230 transitions, 2634 flow [2024-06-27 17:57:19,287 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} [2024-06-27 17:57:19,288 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 119 predicate places. [2024-06-27 17:57:19,288 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 230 transitions, 2634 flow [2024-06-27 17:57:19,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:19,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:19,288 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:19,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 17:57:19,288 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:19,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:19,289 INFO L85 PathProgramCache]: Analyzing trace with hash 1929423699, now seen corresponding path program 1 times [2024-06-27 17:57:19,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:19,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551907434] [2024-06-27 17:57:19,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:19,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:19,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:19,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:19,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:19,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551907434] [2024-06-27 17:57:19,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551907434] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:19,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:19,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:57:19,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92945493] [2024-06-27 17:57:19,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:19,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:57:19,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:19,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:57:19,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:57:19,399 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:57:19,400 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) [2024-06-27 17:57:19,400 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:19,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:57:19,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:20,200 INFO L124 PetriNetUnfolderBase]: 4098/6636 cut-off events. [2024-06-27 17:57:20,200 INFO L125 PetriNetUnfolderBase]: For 220866/220866 co-relation queries the response was YES. [2024-06-27 17:57:20,234 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. [2024-06-27 17:57:20,258 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 252 selfloop transitions, 45 changer transitions 0/311 dead transitions. [2024-06-27 17:57:20,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 311 transitions, 3940 flow [2024-06-27 17:57:20,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:57:20,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:57:20,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 294 transitions. [2024-06-27 17:57:20,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7101449275362319 [2024-06-27 17:57:20,261 INFO L175 Difference]: Start difference. First operand has 169 places, 230 transitions, 2634 flow. Second operand 9 states and 294 transitions. [2024-06-27 17:57:20,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 311 transitions, 3940 flow [2024-06-27 17:57:20,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 311 transitions, 3867 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-27 17:57:20,498 INFO L231 Difference]: Finished difference. Result has 176 places, 236 transitions, 2819 flow [2024-06-27 17:57:20,498 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} [2024-06-27 17:57:20,499 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 126 predicate places. [2024-06-27 17:57:20,499 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 236 transitions, 2819 flow [2024-06-27 17:57:20,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:20,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:20,499 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:20,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 17:57:20,499 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:20,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:20,500 INFO L85 PathProgramCache]: Analyzing trace with hash 2045105521, now seen corresponding path program 2 times [2024-06-27 17:57:20,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:20,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877102827] [2024-06-27 17:57:20,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:20,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:20,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:20,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:20,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:20,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877102827] [2024-06-27 17:57:20,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877102827] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:20,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:20,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:57:20,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579712599] [2024-06-27 17:57:20,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:20,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:57:20,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:20,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:57:20,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:57:20,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:57:20,618 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) [2024-06-27 17:57:20,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:20,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:57:20,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:21,422 INFO L124 PetriNetUnfolderBase]: 4411/7214 cut-off events. [2024-06-27 17:57:21,422 INFO L125 PetriNetUnfolderBase]: For 247023/247023 co-relation queries the response was YES. [2024-06-27 17:57:21,461 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. [2024-06-27 17:57:21,488 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 234 selfloop transitions, 42 changer transitions 0/290 dead transitions. [2024-06-27 17:57:21,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 290 transitions, 3660 flow [2024-06-27 17:57:21,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:57:21,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:57:21,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 253 transitions. [2024-06-27 17:57:21,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6875 [2024-06-27 17:57:21,489 INFO L175 Difference]: Start difference. First operand has 176 places, 236 transitions, 2819 flow. Second operand 8 states and 253 transitions. [2024-06-27 17:57:21,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 290 transitions, 3660 flow [2024-06-27 17:57:21,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 290 transitions, 3557 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-27 17:57:21,814 INFO L231 Difference]: Finished difference. Result has 180 places, 238 transitions, 2880 flow [2024-06-27 17:57:21,814 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} [2024-06-27 17:57:21,814 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 130 predicate places. [2024-06-27 17:57:21,815 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 238 transitions, 2880 flow [2024-06-27 17:57:21,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:21,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:21,815 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:21,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 17:57:21,815 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:21,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:21,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1432995623, now seen corresponding path program 3 times [2024-06-27 17:57:21,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:21,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970041617] [2024-06-27 17:57:21,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:21,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:21,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:21,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:21,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:21,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970041617] [2024-06-27 17:57:21,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970041617] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:21,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:21,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:57:21,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956953560] [2024-06-27 17:57:21,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:21,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:57:21,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:21,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:57:21,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:57:21,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:57:21,935 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) [2024-06-27 17:57:21,935 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:21,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:57:21,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:22,808 INFO L124 PetriNetUnfolderBase]: 4420/7244 cut-off events. [2024-06-27 17:57:22,808 INFO L125 PetriNetUnfolderBase]: For 218960/218960 co-relation queries the response was YES. [2024-06-27 17:57:22,850 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. [2024-06-27 17:57:22,878 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 244 selfloop transitions, 43 changer transitions 0/301 dead transitions. [2024-06-27 17:57:22,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 301 transitions, 3910 flow [2024-06-27 17:57:22,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:57:22,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:57:22,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 258 transitions. [2024-06-27 17:57:22,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7010869565217391 [2024-06-27 17:57:22,881 INFO L175 Difference]: Start difference. First operand has 180 places, 238 transitions, 2880 flow. Second operand 8 states and 258 transitions. [2024-06-27 17:57:22,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 301 transitions, 3910 flow [2024-06-27 17:57:23,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 301 transitions, 3783 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-27 17:57:23,294 INFO L231 Difference]: Finished difference. Result has 183 places, 242 transitions, 2981 flow [2024-06-27 17:57:23,294 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} [2024-06-27 17:57:23,294 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 133 predicate places. [2024-06-27 17:57:23,295 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 242 transitions, 2981 flow [2024-06-27 17:57:23,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:23,295 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:23,295 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:23,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 17:57:23,295 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)] === [2024-06-27 17:57:23,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:23,295 INFO L85 PathProgramCache]: Analyzing trace with hash -1917067921, now seen corresponding path program 4 times [2024-06-27 17:57:23,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:23,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991135015] [2024-06-27 17:57:23,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:23,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:23,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:23,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:23,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:23,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991135015] [2024-06-27 17:57:23,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991135015] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:23,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:23,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:57:23,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665967275] [2024-06-27 17:57:23,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:23,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:57:23,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:23,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:57:23,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:57:23,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:57:23,400 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) [2024-06-27 17:57:23,400 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:23,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:57:23,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:24,302 INFO L124 PetriNetUnfolderBase]: 4791/7900 cut-off events. [2024-06-27 17:57:24,302 INFO L125 PetriNetUnfolderBase]: For 251645/251645 co-relation queries the response was YES. [2024-06-27 17:57:24,346 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. [2024-06-27 17:57:24,376 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 172 selfloop transitions, 110 changer transitions 0/296 dead transitions. [2024-06-27 17:57:24,376 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 296 transitions, 4085 flow [2024-06-27 17:57:24,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:57:24,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:57:24,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 260 transitions. [2024-06-27 17:57:24,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7065217391304348 [2024-06-27 17:57:24,377 INFO L175 Difference]: Start difference. First operand has 183 places, 242 transitions, 2981 flow. Second operand 8 states and 260 transitions. [2024-06-27 17:57:24,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 296 transitions, 4085 flow [2024-06-27 17:57:24,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 296 transitions, 3976 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-27 17:57:24,797 INFO L231 Difference]: Finished difference. Result has 187 places, 244 transitions, 3175 flow [2024-06-27 17:57:24,797 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} [2024-06-27 17:57:24,798 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 137 predicate places. [2024-06-27 17:57:24,798 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 244 transitions, 3175 flow [2024-06-27 17:57:24,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:24,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:24,798 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:24,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 17:57:24,798 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)] === [2024-06-27 17:57:24,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:24,799 INFO L85 PathProgramCache]: Analyzing trace with hash -1314090791, now seen corresponding path program 5 times [2024-06-27 17:57:24,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:24,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583587867] [2024-06-27 17:57:24,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:24,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:24,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:24,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:24,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:24,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583587867] [2024-06-27 17:57:24,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583587867] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:24,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:24,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:57:24,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103493056] [2024-06-27 17:57:24,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:24,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:57:24,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:24,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:57:24,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:57:24,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:57:24,896 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) [2024-06-27 17:57:24,896 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:24,896 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:57:24,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:26,079 INFO L124 PetriNetUnfolderBase]: 5631/9321 cut-off events. [2024-06-27 17:57:26,079 INFO L125 PetriNetUnfolderBase]: For 311853/311853 co-relation queries the response was YES. [2024-06-27 17:57:26,121 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. [2024-06-27 17:57:26,152 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 184 selfloop transitions, 111 changer transitions 0/309 dead transitions. [2024-06-27 17:57:26,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 309 transitions, 4601 flow [2024-06-27 17:57:26,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:57:26,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:57:26,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 266 transitions. [2024-06-27 17:57:26,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7228260869565217 [2024-06-27 17:57:26,153 INFO L175 Difference]: Start difference. First operand has 187 places, 244 transitions, 3175 flow. Second operand 8 states and 266 transitions. [2024-06-27 17:57:26,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 309 transitions, 4601 flow [2024-06-27 17:57:26,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 309 transitions, 4332 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-27 17:57:26,707 INFO L231 Difference]: Finished difference. Result has 190 places, 248 transitions, 3277 flow [2024-06-27 17:57:26,707 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} [2024-06-27 17:57:26,707 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 140 predicate places. [2024-06-27 17:57:26,707 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 248 transitions, 3277 flow [2024-06-27 17:57:26,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:26,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:26,708 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:26,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 17:57:26,708 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:26,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:26,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1114641131, now seen corresponding path program 6 times [2024-06-27 17:57:26,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:26,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237580515] [2024-06-27 17:57:26,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:26,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:26,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:26,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:26,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:26,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237580515] [2024-06-27 17:57:26,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237580515] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:26,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:26,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:57:26,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757697664] [2024-06-27 17:57:26,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:26,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:57:26,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:26,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:57:26,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:57:26,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:57:26,819 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) [2024-06-27 17:57:26,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:26,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:57:26,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:27,897 INFO L124 PetriNetUnfolderBase]: 5651/9331 cut-off events. [2024-06-27 17:57:27,897 INFO L125 PetriNetUnfolderBase]: For 296732/296732 co-relation queries the response was YES. [2024-06-27 17:57:27,963 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. [2024-06-27 17:57:28,002 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 172 selfloop transitions, 115 changer transitions 0/301 dead transitions. [2024-06-27 17:57:28,002 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 301 transitions, 4328 flow [2024-06-27 17:57:28,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:57:28,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:57:28,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 259 transitions. [2024-06-27 17:57:28,003 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7038043478260869 [2024-06-27 17:57:28,003 INFO L175 Difference]: Start difference. First operand has 190 places, 248 transitions, 3277 flow. Second operand 8 states and 259 transitions. [2024-06-27 17:57:28,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 301 transitions, 4328 flow [2024-06-27 17:57:28,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 301 transitions, 4112 flow, removed 35 selfloop flow, removed 4 redundant places. [2024-06-27 17:57:28,557 INFO L231 Difference]: Finished difference. Result has 194 places, 250 transitions, 3383 flow [2024-06-27 17:57:28,557 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} [2024-06-27 17:57:28,557 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 144 predicate places. [2024-06-27 17:57:28,557 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 250 transitions, 3383 flow [2024-06-27 17:57:28,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:28,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:28,561 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:28,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 17:57:28,561 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:28,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:28,561 INFO L85 PathProgramCache]: Analyzing trace with hash -1924030641, now seen corresponding path program 1 times [2024-06-27 17:57:28,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:28,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333491118] [2024-06-27 17:57:28,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:28,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:28,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:28,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:28,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:28,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333491118] [2024-06-27 17:57:28,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333491118] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:28,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:28,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:57:28,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432693602] [2024-06-27 17:57:28,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:28,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:57:28,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:28,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:57:28,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:57:28,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:57:28,678 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) [2024-06-27 17:57:28,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:28,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:57:28,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:29,822 INFO L124 PetriNetUnfolderBase]: 5953/9919 cut-off events. [2024-06-27 17:57:29,822 INFO L125 PetriNetUnfolderBase]: For 306451/306451 co-relation queries the response was YES. [2024-06-27 17:57:29,883 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. [2024-06-27 17:57:29,921 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 172 selfloop transitions, 123 changer transitions 0/309 dead transitions. [2024-06-27 17:57:29,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 309 transitions, 4491 flow [2024-06-27 17:57:29,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:57:29,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:57:29,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 263 transitions. [2024-06-27 17:57:29,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7146739130434783 [2024-06-27 17:57:29,924 INFO L175 Difference]: Start difference. First operand has 194 places, 250 transitions, 3383 flow. Second operand 8 states and 263 transitions. [2024-06-27 17:57:29,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 309 transitions, 4491 flow [2024-06-27 17:57:30,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 309 transitions, 4208 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-27 17:57:30,582 INFO L231 Difference]: Finished difference. Result has 196 places, 252 transitions, 3437 flow [2024-06-27 17:57:30,582 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} [2024-06-27 17:57:30,582 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 146 predicate places. [2024-06-27 17:57:30,582 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 252 transitions, 3437 flow [2024-06-27 17:57:30,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:30,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:30,582 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:30,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 17:57:30,583 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)] === [2024-06-27 17:57:30,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:30,583 INFO L85 PathProgramCache]: Analyzing trace with hash 277552685, now seen corresponding path program 1 times [2024-06-27 17:57:30,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:30,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19358440] [2024-06-27 17:57:30,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:30,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:30,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:30,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:30,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:30,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19358440] [2024-06-27 17:57:30,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19358440] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:30,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:30,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:57:30,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628097103] [2024-06-27 17:57:30,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:30,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:57:30,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:30,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:57:30,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:57:30,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:57:30,659 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) [2024-06-27 17:57:30,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:30,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:57:30,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:31,786 INFO L124 PetriNetUnfolderBase]: 5947/9958 cut-off events. [2024-06-27 17:57:31,786 INFO L125 PetriNetUnfolderBase]: For 261079/261079 co-relation queries the response was YES. [2024-06-27 17:57:31,847 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. [2024-06-27 17:57:31,885 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 204 selfloop transitions, 64 changer transitions 0/282 dead transitions. [2024-06-27 17:57:31,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 282 transitions, 4313 flow [2024-06-27 17:57:31,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:57:31,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:57:31,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 189 transitions. [2024-06-27 17:57:31,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6847826086956522 [2024-06-27 17:57:31,886 INFO L175 Difference]: Start difference. First operand has 196 places, 252 transitions, 3437 flow. Second operand 6 states and 189 transitions. [2024-06-27 17:57:31,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 282 transitions, 4313 flow [2024-06-27 17:57:32,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 282 transitions, 4002 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-27 17:57:32,455 INFO L231 Difference]: Finished difference. Result has 196 places, 252 transitions, 3262 flow [2024-06-27 17:57:32,455 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} [2024-06-27 17:57:32,455 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 146 predicate places. [2024-06-27 17:57:32,455 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 252 transitions, 3262 flow [2024-06-27 17:57:32,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:32,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:32,456 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:32,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 17:57:32,456 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)] === [2024-06-27 17:57:32,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:32,456 INFO L85 PathProgramCache]: Analyzing trace with hash 283266605, now seen corresponding path program 2 times [2024-06-27 17:57:32,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:32,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141973839] [2024-06-27 17:57:32,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:32,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:32,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:32,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:32,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:32,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141973839] [2024-06-27 17:57:32,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141973839] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:32,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:32,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:57:32,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655357293] [2024-06-27 17:57:32,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:32,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:57:32,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:32,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:57:32,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:57:32,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:57:32,539 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) [2024-06-27 17:57:32,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:32,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:57:32,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:33,665 INFO L124 PetriNetUnfolderBase]: 5986/10229 cut-off events. [2024-06-27 17:57:33,665 INFO L125 PetriNetUnfolderBase]: For 263971/263971 co-relation queries the response was YES. [2024-06-27 17:57:33,878 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. [2024-06-27 17:57:33,912 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 199 selfloop transitions, 74 changer transitions 0/287 dead transitions. [2024-06-27 17:57:33,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 287 transitions, 4270 flow [2024-06-27 17:57:33,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:57:33,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:57:33,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 184 transitions. [2024-06-27 17:57:33,913 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-27 17:57:33,913 INFO L175 Difference]: Start difference. First operand has 196 places, 252 transitions, 3262 flow. Second operand 6 states and 184 transitions. [2024-06-27 17:57:33,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 287 transitions, 4270 flow [2024-06-27 17:57:34,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 287 transitions, 4150 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-06-27 17:57:34,369 INFO L231 Difference]: Finished difference. Result has 200 places, 260 transitions, 3441 flow [2024-06-27 17:57:34,369 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} [2024-06-27 17:57:34,369 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 150 predicate places. [2024-06-27 17:57:34,369 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 260 transitions, 3441 flow [2024-06-27 17:57:34,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:34,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:34,370 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:34,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 17:57:34,370 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:34,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:34,370 INFO L85 PathProgramCache]: Analyzing trace with hash 1924240095, now seen corresponding path program 7 times [2024-06-27 17:57:34,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:34,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829107342] [2024-06-27 17:57:34,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:34,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:34,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:34,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:34,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:34,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829107342] [2024-06-27 17:57:34,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829107342] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:34,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:34,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:57:34,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481698778] [2024-06-27 17:57:34,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:34,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:57:34,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:34,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:57:34,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:57:34,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:57:34,488 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) [2024-06-27 17:57:34,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:34,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:57:34,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:36,024 INFO L124 PetriNetUnfolderBase]: 6357/10475 cut-off events. [2024-06-27 17:57:36,024 INFO L125 PetriNetUnfolderBase]: For 337866/337866 co-relation queries the response was YES. [2024-06-27 17:57:36,086 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. [2024-06-27 17:57:36,127 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 191 selfloop transitions, 104 changer transitions 0/309 dead transitions. [2024-06-27 17:57:36,127 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 309 transitions, 4433 flow [2024-06-27 17:57:36,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:57:36,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:57:36,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 253 transitions. [2024-06-27 17:57:36,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6875 [2024-06-27 17:57:36,129 INFO L175 Difference]: Start difference. First operand has 200 places, 260 transitions, 3441 flow. Second operand 8 states and 253 transitions. [2024-06-27 17:57:36,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 309 transitions, 4433 flow [2024-06-27 17:57:36,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 309 transitions, 4389 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-06-27 17:57:36,775 INFO L231 Difference]: Finished difference. Result has 207 places, 262 transitions, 3702 flow [2024-06-27 17:57:36,775 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} [2024-06-27 17:57:36,775 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 157 predicate places. [2024-06-27 17:57:36,775 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 262 transitions, 3702 flow [2024-06-27 17:57:36,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:36,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:36,775 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:36,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 17:57:36,775 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)] === [2024-06-27 17:57:36,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:36,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1437764049, now seen corresponding path program 8 times [2024-06-27 17:57:36,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:36,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849260902] [2024-06-27 17:57:36,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:36,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:36,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:36,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:36,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:36,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849260902] [2024-06-27 17:57:36,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849260902] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:36,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:36,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:57:36,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129351353] [2024-06-27 17:57:36,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:36,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:57:36,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:36,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:57:36,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:57:36,884 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:57:36,884 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) [2024-06-27 17:57:36,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:36,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:57:36,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:38,688 INFO L124 PetriNetUnfolderBase]: 6728/11114 cut-off events. [2024-06-27 17:57:38,688 INFO L125 PetriNetUnfolderBase]: For 373572/373572 co-relation queries the response was YES. [2024-06-27 17:57:38,750 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. [2024-06-27 17:57:38,790 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 195 selfloop transitions, 103 changer transitions 0/312 dead transitions. [2024-06-27 17:57:38,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 312 transitions, 4806 flow [2024-06-27 17:57:38,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:57:38,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:57:38,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 253 transitions. [2024-06-27 17:57:38,792 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6875 [2024-06-27 17:57:38,792 INFO L175 Difference]: Start difference. First operand has 207 places, 262 transitions, 3702 flow. Second operand 8 states and 253 transitions. [2024-06-27 17:57:38,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 312 transitions, 4806 flow [2024-06-27 17:57:39,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 312 transitions, 4535 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-27 17:57:39,474 INFO L231 Difference]: Finished difference. Result has 209 places, 264 transitions, 3738 flow [2024-06-27 17:57:39,475 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} [2024-06-27 17:57:39,475 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 159 predicate places. [2024-06-27 17:57:39,475 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 264 transitions, 3738 flow [2024-06-27 17:57:39,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:39,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:39,475 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:39,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 17:57:39,475 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)] === [2024-06-27 17:57:39,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:39,476 INFO L85 PathProgramCache]: Analyzing trace with hash -974047219, now seen corresponding path program 9 times [2024-06-27 17:57:39,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:39,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232642880] [2024-06-27 17:57:39,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:39,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:39,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:39,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:39,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:39,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232642880] [2024-06-27 17:57:39,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232642880] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:39,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:39,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:57:39,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79381074] [2024-06-27 17:57:39,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:39,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:57:39,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:39,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:57:39,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:57:39,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:57:39,573 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) [2024-06-27 17:57:39,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:39,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:57:39,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:41,387 INFO L124 PetriNetUnfolderBase]: 7089/11665 cut-off events. [2024-06-27 17:57:41,387 INFO L125 PetriNetUnfolderBase]: For 390343/390343 co-relation queries the response was YES. [2024-06-27 17:57:41,454 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. [2024-06-27 17:57:41,496 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 186 selfloop transitions, 113 changer transitions 0/313 dead transitions. [2024-06-27 17:57:41,496 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 313 transitions, 4754 flow [2024-06-27 17:57:41,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:57:41,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:57:41,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 252 transitions. [2024-06-27 17:57:41,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6847826086956522 [2024-06-27 17:57:41,497 INFO L175 Difference]: Start difference. First operand has 209 places, 264 transitions, 3738 flow. Second operand 8 states and 252 transitions. [2024-06-27 17:57:41,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 313 transitions, 4754 flow [2024-06-27 17:57:42,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 313 transitions, 4481 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-27 17:57:42,132 INFO L231 Difference]: Finished difference. Result has 211 places, 266 transitions, 3796 flow [2024-06-27 17:57:42,132 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} [2024-06-27 17:57:42,133 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 161 predicate places. [2024-06-27 17:57:42,133 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 266 transitions, 3796 flow [2024-06-27 17:57:42,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:42,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:42,133 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:42,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 17:57:42,134 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)] === [2024-06-27 17:57:42,134 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:42,134 INFO L85 PathProgramCache]: Analyzing trace with hash 1437616179, now seen corresponding path program 10 times [2024-06-27 17:57:42,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:42,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959142908] [2024-06-27 17:57:42,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:42,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:42,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:42,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:42,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:42,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959142908] [2024-06-27 17:57:42,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959142908] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:42,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:42,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:57:42,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113599413] [2024-06-27 17:57:42,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:42,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:57:42,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:42,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:57:42,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:57:42,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:57:42,240 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) [2024-06-27 17:57:42,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:42,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:57:42,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:44,301 INFO L124 PetriNetUnfolderBase]: 7726/12779 cut-off events. [2024-06-27 17:57:44,301 INFO L125 PetriNetUnfolderBase]: For 443219/443219 co-relation queries the response was YES. [2024-06-27 17:57:44,375 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. [2024-06-27 17:57:44,420 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 205 selfloop transitions, 106 changer transitions 0/325 dead transitions. [2024-06-27 17:57:44,420 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 325 transitions, 5140 flow [2024-06-27 17:57:44,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:57:44,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:57:44,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 258 transitions. [2024-06-27 17:57:44,421 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7010869565217391 [2024-06-27 17:57:44,421 INFO L175 Difference]: Start difference. First operand has 211 places, 266 transitions, 3796 flow. Second operand 8 states and 258 transitions. [2024-06-27 17:57:44,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 325 transitions, 5140 flow [2024-06-27 17:57:45,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 325 transitions, 4843 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-27 17:57:45,192 INFO L231 Difference]: Finished difference. Result has 214 places, 270 transitions, 3899 flow [2024-06-27 17:57:45,192 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} [2024-06-27 17:57:45,192 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 164 predicate places. [2024-06-27 17:57:45,192 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 270 transitions, 3899 flow [2024-06-27 17:57:45,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:45,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:45,193 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:45,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 17:57:45,193 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)] === [2024-06-27 17:57:45,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:45,193 INFO L85 PathProgramCache]: Analyzing trace with hash 1644690351, now seen corresponding path program 2 times [2024-06-27 17:57:45,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:45,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804683600] [2024-06-27 17:57:45,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:45,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:45,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:45,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:45,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:45,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804683600] [2024-06-27 17:57:45,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804683600] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:45,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:45,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:57:45,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358632229] [2024-06-27 17:57:45,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:45,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:57:45,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:45,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:57:45,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:57:45,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:57:45,296 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) [2024-06-27 17:57:45,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:45,296 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:57:45,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:47,266 INFO L124 PetriNetUnfolderBase]: 8028/13284 cut-off events. [2024-06-27 17:57:47,266 INFO L125 PetriNetUnfolderBase]: For 459387/459387 co-relation queries the response was YES. [2024-06-27 17:57:47,359 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. [2024-06-27 17:57:47,418 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 201 selfloop transitions, 110 changer transitions 0/325 dead transitions. [2024-06-27 17:57:47,419 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 325 transitions, 4989 flow [2024-06-27 17:57:47,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:57:47,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:57:47,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 257 transitions. [2024-06-27 17:57:47,420 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6983695652173914 [2024-06-27 17:57:47,420 INFO L175 Difference]: Start difference. First operand has 214 places, 270 transitions, 3899 flow. Second operand 8 states and 257 transitions. [2024-06-27 17:57:47,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 325 transitions, 4989 flow [2024-06-27 17:57:48,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 325 transitions, 4760 flow, removed 49 selfloop flow, removed 4 redundant places. [2024-06-27 17:57:48,373 INFO L231 Difference]: Finished difference. Result has 218 places, 272 transitions, 4001 flow [2024-06-27 17:57:48,373 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} [2024-06-27 17:57:48,373 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 168 predicate places. [2024-06-27 17:57:48,373 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 272 transitions, 4001 flow [2024-06-27 17:57:48,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:48,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:48,374 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:48,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 17:57:48,374 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)] === [2024-06-27 17:57:48,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:48,374 INFO L85 PathProgramCache]: Analyzing trace with hash -1550203819, now seen corresponding path program 3 times [2024-06-27 17:57:48,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:48,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749374409] [2024-06-27 17:57:48,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:48,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:48,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:48,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:48,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:48,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749374409] [2024-06-27 17:57:48,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749374409] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:48,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:48,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:57:48,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983695736] [2024-06-27 17:57:48,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:48,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:57:48,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:48,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:57:48,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:57:48,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:57:48,599 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) [2024-06-27 17:57:48,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:48,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:57:48,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:50,616 INFO L124 PetriNetUnfolderBase]: 8323/13795 cut-off events. [2024-06-27 17:57:50,617 INFO L125 PetriNetUnfolderBase]: For 473275/473275 co-relation queries the response was YES. [2024-06-27 17:57:50,708 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. [2024-06-27 17:57:50,757 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 196 selfloop transitions, 117 changer transitions 0/327 dead transitions. [2024-06-27 17:57:50,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 327 transitions, 5103 flow [2024-06-27 17:57:50,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:57:50,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:57:50,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 257 transitions. [2024-06-27 17:57:50,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6983695652173914 [2024-06-27 17:57:50,759 INFO L175 Difference]: Start difference. First operand has 218 places, 272 transitions, 4001 flow. Second operand 8 states and 257 transitions. [2024-06-27 17:57:50,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 327 transitions, 5103 flow [2024-06-27 17:57:51,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 327 transitions, 4802 flow, removed 42 selfloop flow, removed 6 redundant places. [2024-06-27 17:57:51,712 INFO L231 Difference]: Finished difference. Result has 220 places, 274 transitions, 4049 flow [2024-06-27 17:57:51,712 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} [2024-06-27 17:57:51,713 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 170 predicate places. [2024-06-27 17:57:51,713 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 274 transitions, 4049 flow [2024-06-27 17:57:51,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:51,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:51,713 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:51,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 17:57:51,713 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)] === [2024-06-27 17:57:51,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:51,714 INFO L85 PathProgramCache]: Analyzing trace with hash -1236504589, now seen corresponding path program 4 times [2024-06-27 17:57:51,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:51,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438181480] [2024-06-27 17:57:51,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:51,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:51,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:51,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:51,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:51,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438181480] [2024-06-27 17:57:51,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438181480] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:51,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:51,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:57:51,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066939080] [2024-06-27 17:57:51,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:51,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:57:51,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:51,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:57:51,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:57:51,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:57:51,946 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) [2024-06-27 17:57:51,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:51,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:57:51,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:54,193 INFO L124 PetriNetUnfolderBase]: 8760/14615 cut-off events. [2024-06-27 17:57:54,193 INFO L125 PetriNetUnfolderBase]: For 508438/508438 co-relation queries the response was YES. [2024-06-27 17:57:54,276 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. [2024-06-27 17:57:54,327 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 192 selfloop transitions, 126 changer transitions 0/332 dead transitions. [2024-06-27 17:57:54,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 332 transitions, 5143 flow [2024-06-27 17:57:54,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:57:54,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:57:54,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 259 transitions. [2024-06-27 17:57:54,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7038043478260869 [2024-06-27 17:57:54,328 INFO L175 Difference]: Start difference. First operand has 220 places, 274 transitions, 4049 flow. Second operand 8 states and 259 transitions. [2024-06-27 17:57:54,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 332 transitions, 5143 flow [2024-06-27 17:57:55,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 332 transitions, 4824 flow, removed 44 selfloop flow, removed 6 redundant places. [2024-06-27 17:57:55,500 INFO L231 Difference]: Finished difference. Result has 221 places, 274 transitions, 3943 flow [2024-06-27 17:57:55,500 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} [2024-06-27 17:57:55,501 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 171 predicate places. [2024-06-27 17:57:55,501 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 274 transitions, 3943 flow [2024-06-27 17:57:55,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:55,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:55,501 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:55,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-27 17:57:55,501 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:55,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:55,502 INFO L85 PathProgramCache]: Analyzing trace with hash -692051853, now seen corresponding path program 3 times [2024-06-27 17:57:55,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:55,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819333424] [2024-06-27 17:57:55,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:55,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:55,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:55,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:55,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:55,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819333424] [2024-06-27 17:57:55,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819333424] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:55,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:55,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:57:55,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424962975] [2024-06-27 17:57:55,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:55,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:57:55,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:55,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:57:55,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:57:55,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:57:55,581 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) [2024-06-27 17:57:55,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:55,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:57:55,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:57,667 INFO L124 PetriNetUnfolderBase]: 8754/14555 cut-off events. [2024-06-27 17:57:57,668 INFO L125 PetriNetUnfolderBase]: For 445482/445482 co-relation queries the response was YES. [2024-06-27 17:57:57,770 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. [2024-06-27 17:57:57,830 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 221 selfloop transitions, 65 changer transitions 0/300 dead transitions. [2024-06-27 17:57:57,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 300 transitions, 4791 flow [2024-06-27 17:57:57,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:57:57,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:57:57,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 182 transitions. [2024-06-27 17:57:57,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6594202898550725 [2024-06-27 17:57:57,831 INFO L175 Difference]: Start difference. First operand has 221 places, 274 transitions, 3943 flow. Second operand 6 states and 182 transitions. [2024-06-27 17:57:57,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 300 transitions, 4791 flow [2024-06-27 17:57:59,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 300 transitions, 4381 flow, removed 48 selfloop flow, removed 7 redundant places. [2024-06-27 17:57:59,090 INFO L231 Difference]: Finished difference. Result has 220 places, 274 transitions, 3672 flow [2024-06-27 17:57:59,090 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} [2024-06-27 17:57:59,090 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 170 predicate places. [2024-06-27 17:57:59,091 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 274 transitions, 3672 flow [2024-06-27 17:57:59,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:59,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:59,091 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:59,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-27 17:57:59,091 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:59,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:59,091 INFO L85 PathProgramCache]: Analyzing trace with hash -896937073, now seen corresponding path program 4 times [2024-06-27 17:57:59,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:59,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115903888] [2024-06-27 17:57:59,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:59,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:59,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:59,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:59,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:59,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115903888] [2024-06-27 17:57:59,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115903888] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:59,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:59,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:57:59,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337079710] [2024-06-27 17:57:59,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:59,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:57:59,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:59,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:57:59,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:57:59,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:57:59,164 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) [2024-06-27 17:57:59,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:59,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:57:59,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:01,157 INFO L124 PetriNetUnfolderBase]: 8509/14650 cut-off events. [2024-06-27 17:58:01,158 INFO L125 PetriNetUnfolderBase]: For 397614/397614 co-relation queries the response was YES. [2024-06-27 17:58:01,251 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. [2024-06-27 17:58:01,300 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 219 selfloop transitions, 63 changer transitions 0/296 dead transitions. [2024-06-27 17:58:01,300 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 296 transitions, 4396 flow [2024-06-27 17:58:01,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:58:01,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:58:01,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 179 transitions. [2024-06-27 17:58:01,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6485507246376812 [2024-06-27 17:58:01,301 INFO L175 Difference]: Start difference. First operand has 220 places, 274 transitions, 3672 flow. Second operand 6 states and 179 transitions. [2024-06-27 17:58:01,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 296 transitions, 4396 flow [2024-06-27 17:58:01,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 296 transitions, 4297 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-27 17:58:01,946 INFO L231 Difference]: Finished difference. Result has 223 places, 274 transitions, 3708 flow [2024-06-27 17:58:01,947 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} [2024-06-27 17:58:01,947 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 173 predicate places. [2024-06-27 17:58:01,947 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 274 transitions, 3708 flow [2024-06-27 17:58:01,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:01,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:01,947 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:01,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-27 17:58:01,947 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:58:01,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:01,948 INFO L85 PathProgramCache]: Analyzing trace with hash -91971583, now seen corresponding path program 5 times [2024-06-27 17:58:01,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:01,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700100808] [2024-06-27 17:58:01,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:01,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:01,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:02,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:58:02,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:02,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700100808] [2024-06-27 17:58:02,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700100808] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:02,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:02,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:58:02,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234332863] [2024-06-27 17:58:02,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:02,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:58:02,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:02,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:58:02,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:58:02,036 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:58:02,036 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) [2024-06-27 17:58:02,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:02,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:58:02,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:04,239 INFO L124 PetriNetUnfolderBase]: 8418/14118 cut-off events. [2024-06-27 17:58:04,239 INFO L125 PetriNetUnfolderBase]: For 403046/403046 co-relation queries the response was YES. [2024-06-27 17:58:04,330 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. [2024-06-27 17:58:04,382 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 206 selfloop transitions, 74 changer transitions 0/294 dead transitions. [2024-06-27 17:58:04,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 294 transitions, 4536 flow [2024-06-27 17:58:04,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:58:04,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:58:04,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 178 transitions. [2024-06-27 17:58:04,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.644927536231884 [2024-06-27 17:58:04,383 INFO L175 Difference]: Start difference. First operand has 223 places, 274 transitions, 3708 flow. Second operand 6 states and 178 transitions. [2024-06-27 17:58:04,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 294 transitions, 4536 flow [2024-06-27 17:58:05,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 294 transitions, 4372 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-27 17:58:05,416 INFO L231 Difference]: Finished difference. Result has 223 places, 274 transitions, 3699 flow [2024-06-27 17:58:05,417 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} [2024-06-27 17:58:05,417 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 173 predicate places. [2024-06-27 17:58:05,417 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 274 transitions, 3699 flow [2024-06-27 17:58:05,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:05,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:05,417 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:05,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-27 17:58:05,417 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:58:05,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:05,418 INFO L85 PathProgramCache]: Analyzing trace with hash -697635283, now seen corresponding path program 6 times [2024-06-27 17:58:05,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:05,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536819311] [2024-06-27 17:58:05,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:05,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:05,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:05,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:58:05,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:05,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536819311] [2024-06-27 17:58:05,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536819311] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:05,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:05,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:58:05,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632482551] [2024-06-27 17:58:05,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:05,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:58:05,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:05,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:58:05,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:58:05,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:58:05,494 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) [2024-06-27 17:58:05,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:05,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:58:05,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:07,524 INFO L124 PetriNetUnfolderBase]: 8325/13934 cut-off events. [2024-06-27 17:58:07,524 INFO L125 PetriNetUnfolderBase]: For 410252/410252 co-relation queries the response was YES. [2024-06-27 17:58:07,622 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. [2024-06-27 17:58:07,672 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 209 selfloop transitions, 70 changer transitions 0/293 dead transitions. [2024-06-27 17:58:07,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 293 transitions, 4413 flow [2024-06-27 17:58:07,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:58:07,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:58:07,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 176 transitions. [2024-06-27 17:58:07,673 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6376811594202898 [2024-06-27 17:58:07,673 INFO L175 Difference]: Start difference. First operand has 223 places, 274 transitions, 3699 flow. Second operand 6 states and 176 transitions. [2024-06-27 17:58:07,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 293 transitions, 4413 flow [2024-06-27 17:58:08,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 293 transitions, 4155 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-27 17:58:08,513 INFO L231 Difference]: Finished difference. Result has 222 places, 274 transitions, 3590 flow [2024-06-27 17:58:08,513 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} [2024-06-27 17:58:08,514 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 172 predicate places. [2024-06-27 17:58:08,514 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 274 transitions, 3590 flow [2024-06-27 17:58:08,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:08,514 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:08,514 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:08,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-27 17:58:08,514 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:58:08,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:08,514 INFO L85 PathProgramCache]: Analyzing trace with hash -703347776, now seen corresponding path program 1 times [2024-06-27 17:58:08,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:08,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273102748] [2024-06-27 17:58:08,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:08,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:08,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:08,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:58:08,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:08,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273102748] [2024-06-27 17:58:08,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273102748] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:08,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:08,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:58:08,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544099425] [2024-06-27 17:58:08,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:08,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:58:08,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:08,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:58:08,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:58:08,816 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:58:08,817 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) [2024-06-27 17:58:08,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:08,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:58:08,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:10,790 INFO L124 PetriNetUnfolderBase]: 8347/13789 cut-off events. [2024-06-27 17:58:10,790 INFO L125 PetriNetUnfolderBase]: For 418876/418876 co-relation queries the response was YES. [2024-06-27 17:58:10,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71416 conditions, 13789 events. 8347/13789 cut-off events. For 418876/418876 co-relation queries the response was YES. Maximal size of possible extension queue 958. Compared 110907 event pairs, 2693 based on Foata normal form. 2/13782 useless extension candidates. Maximal degree in co-relation 71315. Up to 12397 conditions per place. [2024-06-27 17:58:10,938 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 215 selfloop transitions, 74 changer transitions 0/303 dead transitions. [2024-06-27 17:58:10,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 303 transitions, 4414 flow [2024-06-27 17:58:10,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:58:10,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:58:10,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 181 transitions. [2024-06-27 17:58:10,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6557971014492754 [2024-06-27 17:58:10,939 INFO L175 Difference]: Start difference. First operand has 222 places, 274 transitions, 3590 flow. Second operand 6 states and 181 transitions. [2024-06-27 17:58:10,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 303 transitions, 4414 flow [2024-06-27 17:58:12,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 303 transitions, 4196 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 17:58:12,073 INFO L231 Difference]: Finished difference. Result has 221 places, 278 transitions, 3604 flow [2024-06-27 17:58:12,073 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3380, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3604, PETRI_PLACES=221, PETRI_TRANSITIONS=278} [2024-06-27 17:58:12,074 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 171 predicate places. [2024-06-27 17:58:12,074 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 278 transitions, 3604 flow [2024-06-27 17:58:12,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.333333333333332) internal successors, (122), 6 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:12,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:12,074 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:12,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-27 17:58:12,074 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:58:12,074 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:12,074 INFO L85 PathProgramCache]: Analyzing trace with hash -1893730444, now seen corresponding path program 2 times [2024-06-27 17:58:12,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:12,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678168228] [2024-06-27 17:58:12,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:12,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:12,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:12,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:58:12,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:12,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678168228] [2024-06-27 17:58:12,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678168228] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:12,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:12,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:58:12,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828282316] [2024-06-27 17:58:12,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:12,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:58:12,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:12,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:58:12,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:58:12,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:58:12,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 278 transitions, 3604 flow. Second operand has 6 states, 6 states have (on average 20.333333333333332) internal successors, (122), 6 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:12,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:12,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:58:12,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:14,019 INFO L124 PetriNetUnfolderBase]: 8369/14359 cut-off events. [2024-06-27 17:58:14,019 INFO L125 PetriNetUnfolderBase]: For 433371/433371 co-relation queries the response was YES. [2024-06-27 17:58:14,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72306 conditions, 14359 events. 8369/14359 cut-off events. For 433371/433371 co-relation queries the response was YES. Maximal size of possible extension queue 991. Compared 119618 event pairs, 3327 based on Foata normal form. 2/14343 useless extension candidates. Maximal degree in co-relation 72204. Up to 12417 conditions per place. [2024-06-27 17:58:14,179 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 218 selfloop transitions, 72 changer transitions 0/304 dead transitions. [2024-06-27 17:58:14,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 304 transitions, 4424 flow [2024-06-27 17:58:14,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:58:14,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:58:14,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 177 transitions. [2024-06-27 17:58:14,180 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6413043478260869 [2024-06-27 17:58:14,180 INFO L175 Difference]: Start difference. First operand has 221 places, 278 transitions, 3604 flow. Second operand 6 states and 177 transitions. [2024-06-27 17:58:14,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 304 transitions, 4424 flow [2024-06-27 17:58:15,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 304 transitions, 4309 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-27 17:58:15,474 INFO L231 Difference]: Finished difference. Result has 224 places, 282 transitions, 3715 flow [2024-06-27 17:58:15,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3492, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3715, PETRI_PLACES=224, PETRI_TRANSITIONS=282} [2024-06-27 17:58:15,474 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 174 predicate places. [2024-06-27 17:58:15,474 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 282 transitions, 3715 flow [2024-06-27 17:58:15,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.333333333333332) internal successors, (122), 6 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:15,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:15,475 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:15,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-27 17:58:15,475 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:58:15,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:15,475 INFO L85 PathProgramCache]: Analyzing trace with hash 73462200, now seen corresponding path program 3 times [2024-06-27 17:58:15,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:15,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71385398] [2024-06-27 17:58:15,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:15,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:15,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:15,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:58:15,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:15,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71385398] [2024-06-27 17:58:15,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71385398] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:15,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:15,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:58:15,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533865178] [2024-06-27 17:58:15,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:15,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:58:15,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:15,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:58:15,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:58:15,556 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:58:15,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 282 transitions, 3715 flow. Second operand has 6 states, 6 states have (on average 20.333333333333332) internal successors, (122), 6 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:15,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:15,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:58:15,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand